CN104576121B - Magnetic blowing arc extinguishing switch - Google Patents
Magnetic blowing arc extinguishing switch Download PDFInfo
- Publication number
- CN104576121B CN104576121B CN201510030473.0A CN201510030473A CN104576121B CN 104576121 B CN104576121 B CN 104576121B CN 201510030473 A CN201510030473 A CN 201510030473A CN 104576121 B CN104576121 B CN 104576121B
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- CN
- China
- Prior art keywords
- magnetic
- arc
- arc extinguishing
- static contact
- electric
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- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention provides a kind of magnetic blowing arc extinguishing switch, the magnetic blowing arc extinguishing switch includes static contact and the moving contact coordinated with static contact, static contact is connected by the first electric-conductor with first line, and moving contact is also included by the second electric-conductor and the second connection, magnetic blowing arc extinguishing switch：Magnetic blow-out part, magnetic blow-out part are arranged at static contact, and are connected between static contact and the first electric-conductor；Arc-extinguishing unit, it is arranged on the junction of moving contact and static contact.Apply the technical scheme of the present invention the problem of efficiently solving on-load switch arc-control device arc quenching characteristic difference in the prior art.
Description
Technical field
The present invention relates to switching technique field, in particular to a kind of magnetic blowing arc extinguishing switch.
Background technology
With the construction and transformation of China's urban distribution network, power load switch is widely used in 12~40.5kV switch
In cabinet, ring network power supplying units and box-type substation.On-load switch is except needing with the function of cut-offfing load current, it is also necessary to
Possess the function of cut-offfing of certain fault current, including the function of transfer current and take-over current when being combined with fuse.These
Error protection of the function especially suitable for transformer.
On-load switch is varied, and its arc extinction performance can be all considered when design.From the point of view of arc quenching principle, it is divided into and goes out
Arc grid formula, permanent magnetism rotation arc formula or air pressing type etc..Wherein arc extinguishing grating structure type is the simplest, has achieved more next extensive
Using.During arc extinguishing, moving contact separating brake electric arc moves arc extinguishing grating structure into grid, is cut using grid and extinguishes electricity
Arc, reach the purpose that electric current cut-offs.But only acted at present during traditional arc extinguishing grating structure arcing by electric arc self-field power, magnetic
The effect of blowing is very weak, and arc motion speed is slow, and burning position concentrates on former grid, causes static contact, arc extinguishing grid pieces
Ablation is serious, punctures after arc and is easy to occur.
Simultaneously, with the raising of load capacity in system, the requirement to on-load switch current breaking capacity is also continuous
Improve, arc extinguishing grating structure transfer current traditional at present and cut-offfing for take-over current become more difficult, it is therefore desirable to improve
The arc extinguishing ability of on-load switch meets various requirement.
The content of the invention
It is a primary object of the present invention to provide a kind of magnetic blowing arc extinguishing switch, to solve on-load switch arc extinguishing in the prior art
The problem of device arc quenching characteristic difference.
To achieve these goals, the invention provides a kind of magnetic blowing arc extinguishing switch, including static contact and match somebody with somebody with static contact
The moving contact of conjunction, static contact are connected by the first electric-conductor with first line, and moving contact passes through the second electric-conductor and the second circuit
Connection, magnetic blowing arc extinguishing switch also include：Magnetic blow-out part, magnetic blow-out part is arranged at static contact, and is connected to static contact and first
Between electric-conductor；Arc-extinguishing unit, it is arranged on the junction of moving contact and static contact.
Further, magnetic blow-out part includes installation portion and connecting portion, and installation portion is connected with static contact, and connecting portion is led with first
Electric part connection, is electrically connected with the coil portion that can generate magnetic field between installation portion and connecting portion.
Further, coil portion includes first coil portion and the second coil portion, and first coil portion and the second coil portion are arranged side by side
Generation magnetic direction opposite the first magnetic field and the second magnetic field are set, form dipole magnetic field.
Further, magnetic blow-out part is concave character type structure, is formed as installation portion, character cut in bas-relief in the recess bottom of concave character type structure
Be formed as connecting portion in the relative a line in the recess bottom of type structure, right one side of something of concave character type structure is formed as first coil
Portion, left one side of something of concave character type structure are formed as the second coil portion.
Further, arc-extinguishing unit includes the arc-chute that multi-disc forms apart from one another by stacked arc extinguishing grid pieces, and arc-chute is set
Put in the top of magnetic blow-out part.
Further, arc-extinguishing unit also includes the fixed plate of fixed setting and the fixed column being arranged in fixed plate, goes out
Arc grid are arranged in fixed column.
Further, arc extinguishing grid pieces are U-shaped, and the activity space of moving contact is corresponded at the U mouths of arc extinguishing grid pieces.
Further, static contact is tabular, and moving contact is the double-gate blade that shape is adapted with static contact.
Further, magnetic blowing arc extinguishing switch also includes driving part, and driving part driving moving contact rotates.
Further, driving part includes drive rod, connecting lever and helped pull a cart.Help pull a cart and be set on moving contact, the of connecting lever
One end is connected with helping pull a cart, and the second end of connecting lever is connected with drive rod.
Apply the technical scheme of the present invention, magnetic blow-out switch cut-offs, during sub-switching operation in progress electric current, and static contact is with moving
Contact gap forms arcing.Because magnetic blow-out part electrically connects with static contact, arc current will flow through magnetic blow-out part and form electric current
Loop, then produces self-generated magnetic field on magnetic blow-out part, and the electric arc in contact gap is directed to arc extinguishing under the action of a magnetic force
Part carries out fast arc extinction, reaches the purpose that electric current cut-offs.The magnetic blowing arc extinguishing switch of the present embodiment does not simultaneously need additional electricity
Source powers to magnetic blow-out part, carries out magnetic blow-out effect to electric arc using self-generated magnetic field caused by arc current loop, realizes self energy magnetic
The effect blown, solving that conventional on-load switch arc-control device arc motion speed is slow, arc quenching characteristic is poor, current breaking capacity is low etc. asks
Topic.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to figure, the present invention is further detailed explanation.
Brief description of the drawings
The Figure of description for forming the part of the present invention is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the structural representation of the embodiment of the magnetic blowing arc extinguishing switch according to the present invention；
Fig. 2 shows the structural representation of the magnetic blow-out part of Fig. 1 magnetic blowing arc extinguishing switch；
Fig. 3 shows the magnetic blow-out effect analysis figure at the magnetic blow-out part of Fig. 1 magnetic blowing arc extinguishing switch.
Wherein, above-mentioned accompanying drawing marks including the following drawings：
10th, static contact；20th, moving contact；30th, the first electric-conductor；40th, the second electric-conductor；50th, magnetic blow-out part；51st, install
Portion；52nd, connecting portion；53rd, first coil portion；54th, the second coil portion；60th, arc-extinguishing unit；61st, arc extinguishing grid pieces；62nd, fixed plate；
63rd, fixed column；70th, driving part；71st, drive rod；72nd, connecting lever；73rd, help pull a cart.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, it should all belong to the model that the present invention protects
Enclose.
Fig. 1 shows the magnetic blowing arc extinguishing switch of the present embodiment, and the magnetic blowing arc extinguishing switch includes static contact 10 and and static contact
10 moving contacts 20 coordinated.Static contact 10 is connected by the first electric-conductor 30 with first line, and moving contact 20 is conductive by second
The connection of part 40 and second.Magnetic blowing arc extinguishing switch also includes：Magnetic blow-out part 50 and arc-extinguishing unit 60.Wherein, magnetic blow-out part 50
It is arranged at static contact 10, and is connected between the electric-conductor 30 of static contact 10 and first.Arc-extinguishing unit 60 is arranged on moving contact 20
With the junction of static contact 10.
Using the technical scheme of the present embodiment, during magnetic blow-out switch sub-switching operation, static contact 10 and the gap of moving contact 20
Form arcing.Because magnetic blow-out part 50 electrically connects with static contact 10, arc current will flow through magnetic blow-out part 50 and form electric current loop
Road, then produces self-generated magnetic field on magnetic blow-out part 50, and the electric arc in contact gap is directed to arc extinguishing under the action of a magnetic force
Part 60 carries out fast arc extinction.The magnetic blowing arc extinguishing switch of the present embodiment does not simultaneously need additional power supply to be supplied to magnetic blow-out part 50
Electricity, magnetic blow-out effect is carried out to electric arc using self-generated magnetic field caused by arc current loop, realizes the effect of self energy magnetic blow-out, solve with
The problems such as past on-load switch arc-control device arc motion speed is slow, arc quenching characteristic is poor, current breaking capacity is low.
It should be noted that in the present embodiment, static contact 10 is using the copper tungsten material of resistance to ablation, the He of the first electric-conductor 30
Second electric-conductor 40 all joins part for copper.In order to strengthen the insulating properties at the first electric-conductor 30 and the second electric-conductor 40, first leads
Insulated terminal is provided with outside the electric electric-conductor 40 of part 30 and second.
Specifically, Fig. 2 shows the magnetic blow-out part 50 of the present embodiment, and the magnetic blow-out part 50 includes installation portion 51 and connecting portion
52, installation portion 51 is connected with static contact 10, and connecting portion 52 is connected with the first electric-conductor 30, electric between installation portion 51 and connecting portion 52
The coil portion in magnetic field can be generated by being connected with.Because arc current value is very high, coil portion should meet the use of transient high-current, together
When consider certain mechanical strength to meet impact during breaking-closing operating between static contact 10 and moving contact 20.
In the present embodiment, in order to strengthen the magnetic blow-out of magnetic blow-out part 50 effect, coil portion includes first coil portion 53 and the
Two coil portion 54, the coil portion 54 of first coil portion 53 and second are set up in parallel opposite the first magnetic field and second of generation magnetic direction
Magnetic field, form dipole magnetic field.Specifically, Fig. 2 shows the structural representation of the present embodiment magnetic blow-out part 50.Magnetic blow-out part 50
For concave character type structure, be formed as installation portion 51 in the recess bottom of concave character type structure, the recess bottom of concave character type structure is relative
Be formed as connecting portion 52 in a line, right one side of something of concave character type structure is formed as first coil portion 53, a left side half for concave character type structure
While be formed as the second coil portion 54.In the present embodiment, magnetic blow-out part 50 can use the excellent copper product of electric conductivity, loop
Resistance is small, and temperature rise is low, and excitation effect is strong.Certainly, the concrete structure of magnetic blow-out part 50 is not limited to the present embodiment in the present invention
Described in concave character type structure, as long as the structure that can generate above-mentioned dipole magnetic field is all feasible, it should also belong to this hair
The scope of bright protection.
Assuming that moving contact is pointed in arc current direction by static contact during arcing, then the magnetic blow-out part 50 of concave character type is just
Can along first coil portion 53 and the second coil portion 54 by current separation into two galvanic circles, the caused by first coil portion 53
One magnetic field B1Direction upward, the second magnetic field B caused by the second coil portion 542It is directed downward.Electric arc will be by ambipolar magnetic field B1With
B2Common magnetic blow-out act on quick blow-out.
Detailed process is：As shown in figure 3, relative to the direction of motion of electric arc, the first magnetic field B1With the second magnetic field B2It can distinguish
It is decomposed into longitudinal component and cross stream component.Electric arc is by the first magnetic field B1Longitudinal component B1aEffect, produce a longitudinal direction magnetic
Constriction power F1a, in magnetic pinch power F1aMagnetic blow-out effect under, electric arc between static contact 10 and moving contact 20 is by quick striking to going out
On arc portion part 60 and it is elongated, separates arcing, improves arc voltage during arcing, be advantageous to gap arc.Cause arcing more simultaneously
Uniformly, reduce the concentration ablation on static contact 10, moving contact 20 and arc-extinguishing unit 60, be advantageous to cut-off success.
Similarly, electric arc is by the second magnetic field B2Longitudinal component B2aEffect, produce longitudinal magnetic pinch power F2a, direction with
F1aOn the contrary, the same F of electric arc magnetic blow-out effect1a.Electric arc is by magnetic field B1Cross stream component B1tEffect, produce the vertical electricity of a transverse direction
Magnetic force F1t, in electromagnetic force F1tUnder magnetic blow-out effect, cause electric arc rapid spiral type into side arc-extinguishing unit 60 to run arc, increase
Effective arc extinguishing area of arc-extinguishing unit 60, improve the arc extinguishing ability of arc-extinguishing unit 60.Similarly, electric arc is by the second magnetic field B2It is horizontal
To component B2tEffect, produce laterally vertical electromagnetic force F2t, direction and F1tOn the contrary, electric arc is quickly run into arc-extinguishing unit 60
Arc, the same F of electric arc magnetic blow-out effect1t。
In addition, when arc current is in opposite direction in arc current direction and Fig. 2, ambipolar the first magnetic field of magnetic field B1With
Two magnetic field B2Electric arc magnetic blow-out effect be still same as above.
As shown in figure 1, in the present embodiment, arc-extinguishing unit 60 includes going out for the composition of arc extinguishing grid pieces 61 that multi-disc is stacked mutually
Arc grid, arc-chute are arranged on the top of magnetic blow-out part 50.Multi-disc arc extinguishing grid pieces 61 increase arc extinguishing area apart from one another by being stacked,
Arcing can effectively be separated, improve arc voltage during arcing, enhance the arc extinction performance of arc-chute.Meanwhile coordinate above-mentioned
Magnetic blow-out part 50 can effectively strengthen the service life of magnetic blowing arc extinguishing switch.
As shown in figure 1, arc-extinguishing unit 60 also includes the fixed plate 62 of fixed setting and is arranged on consolidating in fixed plate 62
Fixed column 63, arc-chute are arranged in fixed column 63.Arc-extinguishing unit 60 can firmly be fixed by fixed plate 62 and fixed column 63.
In the present embodiment, fixed plate 62 and fixed column 63 use nonmetallic materials.
In the present embodiment, arc extinguishing grid pieces 61 are U-shaped, and the activity that moving contact 20 is corresponded at the U mouths of arc extinguishing grid pieces 61 is empty
Between.So, arc extinguishing area is increased, coordinates above-mentioned magnetic blow-out part 50 effectively to strengthen arc quenching effect.Preferably, arc extinguishing
Grid 61 is using magnetic property good silicon steel sheet or stainless steel material, to increase electric arc magnetic blow-out effect.
As shown in figure 1, static contact 10 is tabular, moving contact 20 is the double-gate blade that shape is adapted with static contact 10.When
So, static contact 10 is also not limited to also be not limited to double-gate blade for tabular, moving contact 20.The He of static contact 10 of other shapes
As long as moving contact 20 meets that requirement is all feasible.
In the present embodiment, magnetic blowing arc extinguishing switch also includes driving part 70, and driving part 70 drives moving contact 20 to rotate.
Moving contact 20 coordinates the conjunction point for realizing galvanic circle with static contact 10 by rotating.Specifically, Fig. 1 shows the drive of the present embodiment
Dynamic component 70, the driving part 70 include drive rod 71, connecting lever 72 and help pull a cart 73.Help pull a cart and 73 be set on moving contact 20, turn
The first end of arm 72 73 is connected with helping pull a cart, and the second end of connecting lever 72 is connected with drive rod 71.Drive rod 71 is driven by power-equipment
Dynamic, drive rod 71, which rotates, drives connecting lever 72 to move, and connecting lever 72 rotates with 73 driving moving contacts 20 of helping pull a cart.As shown in figure 1, at this
In embodiment, the square hole that can be connected with square shaft is provided with drive rod 71, drive rod 71 is driven by square shaft.Preferably, drive
Part 70 uses nonmetallic materials, ensures insulation characterisitic.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (8)
1. a kind of magnetic blowing arc extinguishing switch, including static contact (10) and the moving contact (20) with the static contact (10) cooperation, described
Static contact (10) is connected by the first electric-conductor (30) with first line, the moving contact (20) by the second electric-conductor (40) with
Second connection, it is characterised in that the magnetic blowing arc extinguishing switch also includes：
Magnetic blow-out part (50), the magnetic blow-out part (50) is arranged on the static contact (10) place, and is connected to the static contact
(10) between first electric-conductor (30)；
Arc-extinguishing unit (60), it is arranged on the junction of the moving contact (20) and the static contact (10)；
The magnetic blow-out part (50) also includes installation portion (51) and connecting portion (52), the installation portion (51) and the static contact
(10) connect, the connecting portion (52) is connected with first electric-conductor (30), the installation portion (51) and the connecting portion
(52) coil portion in magnetic field can be generated by being electrically connected between, and the coil portion includes first coil portion (53) and the second coil portion
(54), the first coil portion (53) and second coil portion (54) are set up in parallel the first opposite magnetic field of generation magnetic direction
With the second magnetic field, dipole magnetic field is formed.
2. magnetic blowing arc extinguishing switch according to claim 1, it is characterised in that the magnetic blow-out part (50) is concave character type knot
Structure, be formed as the installation portion (51), the recess bottom phase of the concave character type structure in the recess bottom of the concave character type structure
To a line on be formed as the connecting portion (52), right one side of something of the concave character type structure is formed as the first coil portion
(53), left one side of something of the concave character type structure is formed as second coil portion (54).
3. magnetic blowing arc extinguishing switch according to claim 1, it is characterised in that it is mutual that the arc-extinguishing unit (60) includes multi-disc
The arc-chute of stacked arc extinguishing grid pieces (61) composition in interval, the arc-chute are arranged on the top of the magnetic blow-out part (50).
4. magnetic blowing arc extinguishing switch according to claim 3, it is characterised in that the arc-extinguishing unit (60) also includes fixation and set
The fixed plate (62) put and the fixed column (63) being arranged in the fixed plate (62), the arc-chute are arranged on the fixation
On post (63).
5. magnetic blowing arc extinguishing switch according to claim 3, it is characterised in that the arc extinguishing grid pieces (61) are U-shaped, described to go out
Correspond to the activity space of the moving contact (20) at the U mouths of arc grid (61).
6. magnetic blowing arc extinguishing switch according to claim 1, it is characterised in that the static contact (10) is tabular, described dynamic
Contact (20) is the double-gate blade that shape is adapted with the static contact (10).
7. magnetic blowing arc extinguishing switch according to claim 1, it is characterised in that the magnetic blowing arc extinguishing switch also includes drive division
Part (70), the driving part (70) drive the moving contact (20) to rotate.
8. magnetic blowing arc extinguishing switch according to claim 7, it is characterised in that the driving part (70) includes drive rod
(71), connecting lever (72) and (73) are helped pull a cart；Help pull a cart (73) are set on the moving contact (20), and the of the connecting lever (72)
One end is connected with help pull a cart (73), and the second end of the connecting lever (72) is connected with the drive rod (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510030473.0A CN104576121B (en) | 2015-01-21 | 2015-01-21 | Magnetic blowing arc extinguishing switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510030473.0A CN104576121B (en) | 2015-01-21 | 2015-01-21 | Magnetic blowing arc extinguishing switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104576121A CN104576121A (en) | 2015-04-29 |
| CN104576121B true CN104576121B (en) | 2017-12-05 |
Family
ID=53091934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510030473.0A Active CN104576121B (en) | 2015-01-21 | 2015-01-21 | Magnetic blowing arc extinguishing switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104576121B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071008A (en) * | 2019-05-21 | 2019-07-30 | 贵州电网有限责任公司 | A kind of AC circuit breaker |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5464956A (en) * | 1994-04-08 | 1995-11-07 | S&C Electric Company | Rotating arc interrupter for loadbreak switch |
| CN102074405A (en) * | 2010-12-08 | 2011-05-25 | 西安交通大学 | Rotary load switch contact arc extinguishing system of SF6 ring main unit |
| CN103560037B (en) * | 2013-10-21 | 2016-04-27 | 武汉长海电气科技开发有限公司 | A kind of load-break switch |
| CN204390941U (en) * | 2015-01-21 | 2015-06-10 | 北京双杰电气股份有限公司 | Magnetic blowing arc extinguishing switch |
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2015
- 2015-01-21 CN CN201510030473.0A patent/CN104576121B/en active Active
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| Publication number | Publication date |
|---|---|
| CN104576121A (en) | 2015-04-29 |
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