CN100485840C - Arc arrester and switch having same - Google Patents

Abstract

Provided is an arc extinguishing device capable of extinguishing an arc not only at a high-current zone but also at a low-current zone by improving an arc extinguishing performance. A grid 110 having grid channels 111a, 111b and an arc extinguishing member 120 having arc extinguishing member channels 121a, 121b are alternately arrayed at a given interval in a moving direction of a movable electrode. The movable electrode is made to pass the grid channels 111a, 111b and the arc extinguishing member channels 121a, 121b sequentially at open channels. Narrow grooves 112a, 112b are formed at the innermost part of the grid channels 111a, 111b. When the channels are opened, the arc is attracted and fixed to (restrained by) the narrow grooves 112a, 112b. Especially, by restraining the arc of the low-current zone in the circuit interrupter 100, a contact time of the arc with an arc extinguishing decomposition gas generated from the arc extinguishing member 120 is secured. As a result, an arc of the low current zone can also be promptly extinguished.

Description

Arc-extinction device and have the derailing switch of this device

Technical field

The present invention relates to a kind of arc-extinction device and have the derailing switch of this device, when open circuit, this arc-extinction device can be eliminated the electric arc that is produced between fixed electrode and the movable electrode.

Background technology

For example, open day is the Japanese special fair 6-77417 patent " arc-extinction device " on August 8th, 1987, and this arc-extinction device has a plurality of switch-in parts that electric arc attracts to be installed in respectively with a plurality of grids (grid) (magnetic) of recess the rear side that is formed at insulator (extinguishing arc member).The part of grid is exposed from the stria that is formed at insulator inner face central authorities.During open circuit, around arc column, because the existence of grid, the flux that produces deflection distributes, and electric arc is driven the inboard toward grid breach recess.Therefore, cut off by each magnetic when electric arc extends, the negative electrode drop-out voltage raises.By arc heat, promote the cooling of electric arc from the thermal decomposition gas of insulator generation.As a result, arc voltage raises hastily, thereby eliminates electric arc.

And for example, open day is the real clear 63-84822 patent " extinguishing arc grid " of opening of Japan on June 3rd, 1988, arc-extinction device wherein comprises that the electric arc that has that is supporting by maintaining part induces with breach and with the stacked a plurality of flase floors (magnetic sheet) in set interval, and with the insulation board (extinguishing arc member) of set interval between each magnetic sheet.During open circuit, electric arc is driven the inboard toward the magnetic sheet breach, and electric arc is blocked by each magnetic sheet, thereby makes the cathode fall voltage of electric arc raise.In addition, arc heat is passed to flase floor, makes electric arc be cooled.Promote the cooling of this electric arc more from the thermal decomposition gas that insulation board produced by arc heat.As a result, arc voltage raises and finishes the elimination of electric arc.

Yet, the arc-extinction device of grid mode in the prior art, blocking is promptly eliminated the electric arc of little electric current and the generation of littler electric current and is had any problem as several little electric currents below 10 amperes of exciting curent in the high-voltage alternating load switch device more than the 3.6/7.2KV and charging current etc.Owing to a little less than the energy shortage of arc current results from the electromagnetic force of grid, make electric arc can't be contacted with extinguishing arc member (above-mentioned insulator and insulation board) energetically.The another one reason is exactly that the heat that produces during open circuit is also less, makes the extinguishing arc decomposition gas also less owing to energy shortage.

Therefore, in arc-extinction device, hope can be guaranteed the blocking performance from big current range to wide zone the little current range.It is special because the electromagnetic force size that above-mentioned magnetic sheet produces is relevant with the blocking performance, therefore, when guaranteeing effective and stable electromagnetic force, wish to shorten more the breaking time of the electric arc in the electric arc in the little current range below 30 amperes, particularly the Weak current scopes below 5 amperes such as exciting curent and charging current.

Summary of the invention

The invention provides a kind of arc-extinction device, its purpose is to improve the performance of eliminating electric arc, not only can eliminate electric arc in big current range, also can eliminate electric arc in little current range.

The present invention also provides a kind of arc-extinction device and has the derailing switch of this device, its objective is the electric arc breaking time that shortens significantly the Weak current scope, for broader region from big current range to little current range, guarantee to produce stable electromagnetic force, make barrier property can stablize raising.

For achieving the above object, the invention provides a kind of arc-extinction device, its magnetic sheet is formed by magnetic and has a magnetic sheet path that can allow movable electrode pass through; Its extinguishing arc member by have insulating properties, formed and had an extinguishing arc member path that can allow movable electrode pass through by contact the synthetic resin that produces the extinguishing arc decomposition gas with electric arc; Magnetic sheet and extinguishing arc member are interconnected on the moving direction of movable electrode, in when open circuit, allow the movable electrode that separates from fixed electrode successively by above-mentioned magnetic sheet path and extinguishing arc member path.

By above-mentioned each magnetic sheet path and each extinguishing arc member path, constitute the movable electrode that passes through for movable electrode and pass through portion; Above-mentioned magnetic sheet path in portion, form the width grooving narrow than this magnetic sheet path, constitute by each grooving and when opening a way, induce the electric arc of the electric arc that between fixed electrode and movable electrode, produces to induce portion; Induce at above-mentioned electric arc on the extended line of portion, be provided with and fixing induce the electric arc of the electric arc that portion induces to restrain portion by this electric arc; Above-mentioned extinguishing arc member path in portion, form width than the narrow deep slotting of this extinguishing arc member path, allow the electric arc of each magnetic sheet induce portion and the contained portion of electric arc to be exposed to respectively in each deep slotting.

In when open circuit, be accompanied by the little electric current below the severals 10A (ampere) that produce between fixed electrode and the movable electrode and the electric arc that produces is induced inside to each grid by the electric arc portion of inducing, induce in the portion at electric arc to be fixed.Then, actively promote the generation of extinguishing arc decomposition gas, and eliminate electric arc by this extinguishing arc decomposition gas.

For guaranteeing the creepage distance of extinguishing arc member side, with the side edge part of the above-mentioned extinguishing arc member path adjacency of above-mentioned extinguishing arc member on, be provided with guarantee this extinguishing arc member side edge identity distance from creepage distance increase structure.

Further, on above-mentioned extinguishing arc member, be provided with the configuration space that allows between magnetic sheet and keep certain interval retaining member; Above-mentioned creepage distance increases structure, be by with the side edge part of described extinguishing arc member path adjacency on, along the formed wall member of this extinguishing arc member path, with the surface and the inner face of extinguishing arc member, and the formed recess of retaining member constitutes at interval.

Simultaneously, the deep slotting of above-mentioned extinguishing arc member is opened to the inboard of this extinguishing arc member, by contacting of extinguishing arc member and electric arc, the extinguishing arc decomposition gas that is produced is rearward derived by extinguishing arc member path and deep slotting.

Side edge part at above-mentioned extinguishing arc member is provided with protuberance, and the relative magnetic sheet side edge part of this protuberance is outstanding, makes the generation that is suppressed at electric arc between each magnetic sheet side edge part.

At above-mentioned magnetic sheet path medial margin in opposite directions, making is parallel to each other corresponding to the position by the movable electrode when this magnetic sheet path at least forms this magnetic sheet path.

In the above-mentioned arc-extinction device, the width setup of grooving also can be set in greater than 0 less than below 1.5 millimeters in 0.5～2 millimeter scope, thereby guarantees the electromagnetic force toward this magnetic sheet inside.

Above-mentioned extinguishing arc member path in portion, also can form the balancing gate pit that allows the extinguishing arc decomposition gas be detained, this balancing gate pit can be provided with a plurality of.

Further, at above-mentioned extinguishing arc member path midway, be provided with to move and suppress structure, the open side that suppresses the past extinguishing arc member of above-mentioned extinguishing arc decomposition gas moves.Therefore, the extinguishing arc decomposition gas also is stranded in the inboard by the mobile inhibition structure in the extinguishing arc member path, improves at this inboard extinguishing arc decomposition gas pressure.

When the thickness of above-mentioned magnetic sheet is d1, the thickness of extinguishing arc member is d2, when the configuration space of extinguishing arc member is d3, forms and configuration extinguishing arc member and magnetic sheet and make d1＜d3＜d2.Then, with set arranged spaced, movable electrode by when each extinguishing arc member path, obtains the effect of areolar successively by these a plurality of extinguishing arc members, thereby promotes the elimination of electric arc.

A kind of derailing switch of the present invention comprises: (1) a pair of sleeve pipe, and each phase place relatively connects support on the two side of body housing; (2) one fixed electrodes are located at the inner end of a sleeve pipe; (3) one movable electrodes are located at the inner end of another sleeve pipe rotationally, can engage separation with respect to the said fixing electrode; And (4) one arc-extinction devices, be located at the inner end of above-mentioned this sleeve pipe.Its magnetic sheet is formed by magnetic and has a magnetic sheet path that can allow movable electrode pass through; Its extinguishing arc member by have insulating properties, formed and had an extinguishing arc member path that can allow movable electrode pass through by contact the synthetic resin that produces the extinguishing arc decomposition gas with electric arc; Magnetic sheet and extinguishing arc member are interconnected on the moving direction of movable electrode, in when open circuit, allow the movable electrode that separates from fixed electrode successively by above-mentioned magnetic sheet path and extinguishing arc member path; By above-mentioned each magnetic sheet path and each extinguishing arc member path, constitute the movable electrode that passes through for movable electrode and pass through portion; Above-mentioned magnetic sheet path in portion, form the width grooving narrow than this magnetic sheet path, constitute by each grooving and when opening a way, induce the electric arc of the electric arc that between fixed electrode and movable electrode, produces to induce portion; Induce at above-mentioned electric arc on the extended line of portion, be provided with and fixing induce the electric arc of the electric arc that portion induces to restrain portion by this electric arc; Above-mentioned extinguishing arc member path in portion, form width than the narrow deep slotting of this extinguishing arc member path, allow the electric arc of each magnetic sheet induce portion and the contained portion of electric arc to be exposed to respectively in each deep slotting.

Further, above-mentioned extinguishing arc member path in portion, formation ends wall portion with the electric arc of this extinguishing arc member path orthogonal, formation ends more inside and parallel with the above-mentioned grooving deep slotting of wall portion from this electric arc, this deep slotting in portion and above-mentioned electric arc end the periphery of wall portion, the part of magnetic sheet is exposed to when reaching in the extinguishing arc member path in the above-mentioned deep slotting, forms opening at this extinguishing arc member path.

End the periphery of wall portion at electric arc, the part of magnetic sheet is exposed in the extinguishing arc member path.Therefore, producing for example electric arc of the Weak current scope below 5 amperes (Weak current electric arc) between fixed electrode and the movable electrode, centrifugal force when following the movable electrode opening operation and induce inboard toward each magnetic sheet path, be located between the exposed division of each magnetic sheet that each electric arc ends wall portion periphery by the electric arc portion of inducing is fixed with the state of short circuit.Therefore, fully guaranteed the time of contact of electric arc and extinguishing arc member.Then, promote also stable simultaneously the generation to end the arc gas of wall portion from electric arc.Simultaneously, the deep slotting of extinguishing arc member is opened to the side of this extinguishing arc member.Therefore, end the periphery of wall portion at electric arc, extinguishing arc gas is successfully discharged to the side, and fresh extinguishing arc gas is supplied with the periphery that electric arc ends wall portion constantly.

Above-mentioned magnetic sheet and extinguishing arc member supports are between pair of supporting members, and two supporting members are located at the open side of movable electrode path.

Above-mentioned supporting member comprises the base portion that is fixed in fixed electrode and supports above-mentioned magnetic sheet and the support portion of extinguishing arc member; Undermost extinguishing arc member connects airtight above above-mentioned base portion.

Inner face at above-mentioned base portion forms single or multiple insulation walls, makes this insulation wall and undermost extinguishing arc member overlapping.

Further, sidepiece at above-mentioned extinguishing arc member is provided with the engaging teat that usefulness is installed, should engage teat inserts from the inboard by the formed extinguishing arc member of above-mentioned supporting member supported hole, by this with this extinguishing arc member supports between two supporting members, at the leading section of above-mentioned engaging teat, be provided with and prevent extracting apparatus.

In the undermost extinguishing arc member in each extinguishing arc member, be provided with the finedraw arc-extinction device at the periphery of extinguishing arc member path.

Sidepiece at above-mentioned extinguishing arc member also is provided with for keeping magnetic sheet to reach the space keeping of configuration space up and down, by the space keeping of the orlop extinguishing arc member in each extinguishing arc member, covers the base portion inner face of above-mentioned supporting member.

The magnetic of above-mentioned two kinds of arc-extinction devices is that ferrite (ferrite) the stainless steel steel by the carbon of chromium that contains 9.0-16.0 weight % and 0.006-0.020 weight % are formed.Therefore both obtained antirust effect, can pass through annealing etc. again,, improved the magnetic of magnetic sheet even obtain the also stable ferrite homogeneous structure of high temperatureization.

Another kind of derailing switch among the present invention comprises: (1) mains side sleeve pipe and load-side sleeve pipe, and each phase place relatively connects support on the two side of body housing; (2) one fixed electrodes are located at the inner end of above-mentioned power supply sleeve pipe; (3) one movable electrodes are located at the inner end of above-mentioned load sleeve rotationally, can engage separation with respect to the said fixing electrode; (4) one arc-extinction devices are located at the inner end of above-mentioned mains side sleeve pipe.Its magnetic sheet is formed by magnetic and has a magnetic sheet path that can allow movable electrode pass through; Its extinguishing arc member by have insulating properties, formed and had an extinguishing arc member path that can allow movable electrode pass through by contact the synthetic resin that produces the extinguishing arc decomposition gas with electric arc; Magnetic sheet and extinguishing arc member are interconnected on the moving direction of movable electrode, in when open circuit, allow the movable electrode that separates from fixed electrode successively by above-mentioned magnetic sheet path and extinguishing arc member path; Above-mentioned magnetic sheet path in portion, form electric arc and induce portion by forming the width grooving narrow than this magnetic sheet path, simultaneously this electric arc induce portion in portion, be provided with the contained portion of electric arc, be used for fixing the electric arc of inducing portion to induce by this electric arc;

Above-mentioned extinguishing arc member path in portion, formation ends wall portion with the electric arc of this extinguishing arc member path orthogonal, formation ends more inside and parallel with the above-mentioned grooving deep slotting of wall portion from this electric arc, this deep slotting in portion and above-mentioned electric arc end the periphery of wall portion, the part of magnetic sheet is exposed to when reaching in the extinguishing arc member path in the above-mentioned deep slotting, and this extinguishing arc member path or deep slotting are opened to side surface direction.(5) drive link, action is linked to above-mentioned movable electrode, and by the driving of this drive link, above-mentioned movable electrode engages with respect to fixed electrode and separates; (6) movable electrode is made of above-mentioned each magnetic path and each extinguishing arc member path by portion, and movable electrode is passed through; (7) air-supply member, its close movable electrode that is arranged on above-mentioned drive link by portion a side or movable electrode originally on one's body, when opening a way, be pressed into above-mentioned movable electrode and pass through in the portion resulting from electric arc between movable electrode and the fixed electrode.

The opening operation of the movable electrode of following the driving of drive link and doing, between fixed electrode and movable electrode, produce electric arc, by following the mobile blast that produces of the air-supply member of being located at drive link or movable electrode itself, promote electric arc to induce to inside by portion through the movable electrode of arc-extinction device.

In addition, in this arc-extinction device, above-mentioned air-supply member and drive link are monolithic moldings.

The present invention also refers to a kind of magnetic sheet formula arc-extinction device, when disposing the magnetic sheet that plural pieces is made of magnetic at certain intervals, with its orthogonal direction on the movable electrode that forms by movable electrode pass through portion; It is characterized by: above-mentioned magnetic is that ferrite (ferrite) the stainless steel steel by the carbon of chromium that contains 9.0～16.0 weight % and 0.006～0.020 weight % are formed.

Compared with prior art, the present invention can eliminate the electric arc of big current range and little current range, has improved the performance of extinguishing arc.The breaking time that significantly shortens the electric arc of Weak current scope, for from big electric current to little electric current in a big way in, guarantee to produce stable electromagnetic force, thereby guarantee stable blocking performance.

Description of drawings

Fig. 1 is the positive view of the first embodiment derailing switch.

Fig. 2 is the plane graph of the first embodiment arc-extinction device.

Fig. 3 is the front view of the first embodiment arc-extinction device.

Fig. 4 is the exploded perspective view of the first embodiment arc-extinction device.

Fig. 5 is the exploded perspective view of arc-extinction device other direction shown in Figure 4.

Fig. 6 is along the direction view of 1-1 line among the 2nd figure of the first embodiment arc-extinction device.

Fig. 7 is the plane graph of the first embodiment magnetic sheet.

Fig. 8 a is the upward view of extinguishing arc member among first embodiment.

Fig. 8 b is the cutaway view of 8a figure along the 2-2 line.

Fig. 9 is the flux distribution schematic diagram of magnetic sheet shown in Figure 7.

Figure 10 is the stereogram of the second embodiment arc-extinction device.

Figure 11 is the stereogram of arc-extinction device other direction shown in Figure 10 among second embodiment.

Figure 12 is the exploded perspective view of the second embodiment arc-extinction device.

Figure 13 is the plane graph of the second embodiment arc-extinction device.

Figure 14 is the stereogram of another embodiment arc-extinction device.

Figure 15 is the front view of another embodiment arc-extinction device.

Figure 16 is the plane graph of another embodiment arc-extinction device.

Figure 17 is the front view of another embodiment arc-extinction device.

Figure 18 is the plane graph of another embodiment arc-extinction device.

Figure 19 is translot 53a in the arc-extinction device shown in Figure 180, second kind of structure of 53b.

Figure 20 a is the plane graph of another embodiment extinguishing arc member.

Figure 20 b is the cutaway view of Figure 12 a along the 3-3 line.

Figure 21 is translot 53a in the arc-extinction device shown in Figure 180, the replacement structure of 53b.

Figure 22 is the significant points plane graph of magnetic sheet among another embodiment.

Figure 23 is the vertical view of extinguishing arc member among another embodiment.

Figure 24 a is magnetic sheet and the incorporate plane graph of extinguishing arc member among another embodiment.

Figure 24 b is the cutaway view of Figure 24 a along the 4-4 line.

Figure 25 is the positive view of the 3rd embodiment derailing switch.

Figure 26 is the plane graph of the 3rd embodiment arc-extinction device.

Figure 27 is the front view of the 3rd embodiment arc-extinction device.

Figure 28 is the A direction view of the 3rd embodiment arc-extinction device.

Figure 29 is the exploded perspective view of the 3rd embodiment arc-extinction device.

Figure 30 is the other direction exploded perspective view of arc-extinction device shown in Figure 29.

Figure 31 is the B direction view of the 3rd embodiment arc-extinction device.

Figure 32 is the plane graph of the 3rd embodiment magnetic sheet.

Figure 33 is the upward view of the 3rd embodiment extinguishing arc member.

Figure 34 a is that Figure 33 is along 1-1 line profile.

Figure 34 b is that Figure 33 is along 2-2 line profile.

Figure 35 is the enlarged drawing of C part among Figure 27.

Figure 36 is along the cutaway view of 3-3 line among Figure 33.

Figure 37 is the front view of drive link among the 3rd embodiment.

Figure 38 is the end view of drive link among the 3rd embodiment.

Figure 39 is the upward view of extinguishing arc member significant points among the 3rd embodiment.

Figure 40 is the end view of arc-extinction device significant points among another embodiment.

Symbol description

11～derailing switch; 12～body housing; 12a, 12b～sidewall; 13～mains side sleeve; 14～load-side sleeve; 15～fixed electrode; 16～contact rod; 17～axle; 19～rotating shaft; 18,21,73,74,75,78～movable electrode; 18a, 18b, 21a, 21b～contact edge; 24～drive link; 30,100,100A～arc-extinction device; 33～air-supply arrangement; 40,110～magnetic sheet (grid); 41a, 41b, 111a, 111b～magnetic sheet path; 42a, 42b, 112a, 112b～electric current are restrained portion and grooving; 50,120～extinguishing arc member; 51a, 51b, 76b, 121a, 121b～extinguishing arc member path; 52a, 52b～connection ditch; The translot of 53a, 53b～formation balancing gate pit; 70a, 123～wall member (electric arc contact wall); 122a, 122b～deep trouth (deep slotting); 123b～opening port; 122e, 128b～awl pull out face; 124～at interval retaining members; 125～formation creepage distance increases the recess of structure; 126～diffusion teat; 127～protuberance; 130～supporting member; 131～base portion, 132～support portion; 134～extinguishing arc member supported hole; 135～insulation wall; 140～engaging teat; 141～sidepiece pulls out only teat; Only teat is pulled out on 142～top; 150～electric arc fixed part; 151～areola wall; 324a～electric arc ends wall portion; D1～magnetic sheet thickness; The thickness of d2～extinguishing arc member; The configuration gap of d3～extinguishing arc member; The width of D1～magnetic sheet path; The width of D2～stria; I～electric arc; W～narrow portion; The width of W1～extinguishing arc member path; The width of W2～stria; α～movable electrode passes through portion; β～electric arc is induced portion; γ～electric arc is restrained portion; δ～space part.

Embodiment

First embodiment

Below, first embodiment at the arc-extinction device that the present invention is embodied as derailing switch describes according to Fig. 1 to Fig. 9.

As shown in Figure 1, on body housing 12 two side in opposite directions of derailing switch 11, mains side sleeve pipe 13 and load-side sleeve pipe 14 are that the every phase of three-phase relatively connects support (expression one divides mutually among Fig. 1) separately.On the inner end of mains side sleeve pipe 13, be equipped with bar-shaped fixed electrode 15, be fixed with the metal 15a of anti-electric arc in the upper front end of same fixed electrode 15.On the inner end of load-side sleeve pipe 14, be equipped with contact rod 16, on same contact rod 16,, rotatably be supported on the base end part of movable electrode 18 by axle 17.Shown in double dot dash line among Fig. 2, movable electrode 18 is a pair of contact edge 18a, the 18b with parallel flat shape.In the present embodiment, the thickness of contact edge 18a, 18b is respectively 4 millimeters.

On the one hand, as shown in Figure 1, bottom in body housing 12, by the linkage (graphic omission) that a plurality of connecting rod constituted, be provided with the rotating shaft 19 on the operating handle (graphic omission) that start is linked to body housing 12 outsides, but lever 20 one are fixed in rotatably on the same rotating shaft 19.One end of drive link 24 rotatably is connected in the front end of lever 20, and the other end of same drive link 24 rotatably is connected near the central authorities of movable electrode 18.Then, during operation aforesaid operations handle, movable electrode 18 is via aforementioned link mechanism, rotating shaft 19, lever 20 and drive link 24, be the center mobile between the input position shown in Fig. 1 solid line and the release position shown in the identical double dot dash line with axle 17.

Arc-extinction device

As shown in Figure 1, arc-extinction device 100 is the inners that are fixed on mains side sleeve pipe 13 with accessory 318 via fixing.Shown in Fig. 3～5, arc-extinction device 100 is the plural grids (magnetic sheet) 110 that formed plate body by magnetic, and by the formed a plurality of extinguishing arc members 120 of the synthetic resin material with insulating properties and extinguishing arc, on the moving direction of movable electrode 18, form with set interleaved ground configuration.Shown in Fig. 4～6, each magnetic sheet 110 and each extinguishing arc member 120 are disposed at respectively between the pair of supporting members 130 and are supporting in the lump.

Supporting member

Shown in Fig. 3～6, supporting member 130 is to be formed by synthetic resin material that contains insulating properties or inorganic material monolithic molding, and has the base portion 131 that is fixed in fixed electrode 15 and support portion 132 with respect to 131 one-tenth oblique shapes of same base portion.On support portion 132, two is many groups magnetic sheet supported hole 133 of one group, on the length direction of same support portion 132, every forming with set interval.Simultaneously, between each group of the magnetic sheet supported hole 133 in support portion 132, form extinguishing arc member supported hole 134.

As shown in Figure 5, the extinguishing arc member is interconnected with supported hole 133 with supported hole 134 and magnetic sheet.Then, at extinguishing arc member 120 during, the engaging teat 140 described later of extinguishing arc member 120 is inserted in the extinguishing arc member with supported hole 134 from the inboard with magnetic sheet 110 combinations.Same method, the projection 113 of magnetic sheet 110 can be fixed in supporting member 130 simultaneously.

Magnetic sheet

As shown in Figure 7, magnetic sheet 110 is the W letter stencil shapes that formed by magnetic (being magnetic mild steel in the present embodiment).At the front-end edge (lateral margins of load-side sleeve pipe 14 sides) of magnetic sheet 110, as can forming with set interval by pair of magnetic plate path 111a, the 111b of contact edge 18a, 18b respectively.At magnetic sheet path 111a, 111b medial margin in opposite directions, the position that corresponds respectively at least by contact edge 18a, 18b when this magnetic sheet path 111a, the 111b becomes to be parallel to each other, and forms magnetic sheet path 111a, 111b.From the viewpoint that the electromagnetic attraction that results from magnetic sheet 110 increases, the width D 1 of magnetic sheet path 111a, 111b is preferably extremely narrow, and in the present embodiment, width D 1 is 8 millimeters, and is wideer slightly than the thickness of contact edge 18a, 18b.

Two magnetic sheet path 111a, 111b in portion, form stria 112a, 112b as grooving.The width D 2 of stria 112a, 112b is narrower than the width D 1 of magnetic sheet path 111a, 111b, is 0.5 millimeter in the present embodiment.Stria 112a, 112b on the direction identical with magnetic sheet path 111a, 111b to the inside (that is the end edge side of magnetic sheet 110) extend and form set length L (L=10 millimeter in the present embodiment).Stria 112a, 112b are in the scope of above-mentioned set length L, and width D 2 is certain parallel slot.Width D 2 for this stria 112a, 112b will describe in detail in the back.At the front end of the both side edges of leaning on magnetic sheet 110, form a pair of projection 113,113, two projections 113,113 are sticked in two supporting members 130 respectively from the inboard magnetic sheet supported hole 133 respectively.

The extinguishing arc member

As Fig. 2 and shown in Figure 4, extinguishing arc member 120 has insulating properties, and forms W letter stencil shape by the synthetic resin material (for example tetrafluoroethene co-polymer fluoroplasts such as (PFA)) of the thermogenetic extinguishing arc decomposition gas of electric arc.Then, extinguishing arc member 120 produces the extinguishing arc decomposition gas by contacting with electric arc.

On the front-end edge (sides of load-side sleeve pipe 14 sides) of extinguishing arc member 120, as can forming with set interval by a pair of extinguishing arc member path 121a, the 121b of contact edge 18a, 18b respectively.The shape of extinguishing arc member path 121a, 121b substantially with magnetic sheet path 111a, 111b consistent (with reference to Fig. 2).

Two extinguishing arc member path 121a, 121b in portion, form deep trouth 122a, 122b respectively as deep slotting.Deep trouth 122a, 122b extend towards inner (that is the end edge of extinguishing arc member 120) with extinguishing arc member path 121a, 121b are equidirectional.The width of deep trouth 122a, 122b is also narrow than the width of extinguishing arc member path 121a, 121b.

Between supporting member 130,130, extinguishing arc member 120 and magnetic sheet 110 stow configuration alternately, with reference to Fig. 3, as seen arc-extinction device 100 is at the stacked direction of extinguishing arc member 120 and magnetic sheet 110, the position of deep trouth 122a, 122b and stria 112a, 112b concerns that as shown in Figure 2 stria 112a, 112b all are positioned at deep trouth 122a, 122b.

As Fig. 4 and shown in Figure 6, on extinguishing arc member path 121a, 121b and deep trouth 122a, 122b medial margin in opposite directions, wall member 123 protrudes in the inner face (omitting among Fig. 2) of extinguishing arc member 120.The inner face that protrudes in the wall member 123 of extinguishing arc member 120 inner faces forms continuous plane 123a.Wall member 123 (speaking by the book the plane 123a of wall member 123) contacts and the electric arc contact member of conduct generation extinguishing arc decomposition gas with this large-current electric arc when big electric current is open.

In addition, in each wall member 123, between outermost two wall members 123 and extinguishing arc member 120 outer side edges, retaining member 124 protrudes in the surface and the inside of extinguishing arc member 120 at interval.This is retaining member 124 at interval, when 130,130 extinguishing arc members of supporting member 120 dispose with magnetic sheet 110 intersectings, by being connected to each magnetic sheet 110, makes the configuration space of this each magnetic sheet 110 keep certain.

The length that interval retaining member 124 is given prominence to from extinguishing arc member 120 the insides, the length of giving prominence to from extinguishing arc member 120 the insides than wall member 123 is big.Therefore, retaining member 124 at interval, when 130 extinguishing arc members of supporting member 120 during with the configuration of magnetic sheet 110 intersectings, each does not contact with magnetic sheet 110 to make the surface of wall member 123, extinguishing arc member 120 and identical the inside.Then, between the surface of wall member 123, extinguishing arc member 120 and the identical the inside and magnetic sheet 110, form set gap.In other words, the height that interval retaining member 124 is given prominence to from the surface and the inside of extinguishing arc member 120 by the degree that contact with magnetic sheet 110, is set in the surface and the identical the inside of wall member 123 and extinguishing arc member 120.

As Fig. 3 and shown in Figure 6, retaining member 124 is held concurrently as the insulated barriers thing that makes insulation between each magnetic sheet 110 in the both sides (left side among the 6th figure and right side) of each extinguishing arc member 120 when extinguishing arc member 120 disposes with magnetic sheet 110 intersectings at interval.When interval retaining member 124 disposes with magnetic sheet 110 intersectings at extinguishing arc member 120, the both sides that inaccessible each extinguishing arc member is 120, and form clearance gap S (with reference to Fig. 6) respectively.

In the inside of extinguishing arc member 120,, form recess 125 from the inside of wall member 123 with interval retaining member 124 and extinguishing arc member 120.By this, the side of extinguishing arc member 120 (length direction with respect to extinguishing arc member path 121a, 121b becomes the direction of orthogonal) attempts to increase creepage distance.

As shown in Figure 2, the rear side end in the both side edges of extinguishing arc member 120 forms protuberance 127 respectively.Extinguishing arc member 120 is supported between the support portion 132 of supporting member 130, makes protuberance 127 outstanding respectively from the dual-side of magnetic sheet 110.By this protuberance 127, guarantee the creepage distance of arc-extinction device 100 sidepieces.

In the front of the both side edges of extinguishing arc member 120, form engaging teat 140 respectively.Protuberance 127 and engaging teat 140, its each external end edge is in the same plane.Two holding sections 140,140 are sticked in the extinguishing arc member of two supporting members 130,130 respectively with the supported hole 134 from the inboard.

In addition, extinguishing arc member 120 is described.Deep trouth 122a, 122b pass through space 122c, 122d to the rear of arc-extinction device 100 opening.In the rear end side of wall member 123, form heavy section 122g, 122h.Shown in Fig. 8 b, in intercepting face 122j up and down,, form heavy section 122f in the rear end side of wall member 123.This heavy section 122f diminishes to the rear end side wall thickness of extinguishing arc member 120, the surface of this heavy section 122f with intercept face 122j up and down and pull out face 122e by awl and be connected.By this structure, when handling the consumption that electric arc causes, the extinguishing arc decomposition gas can successfully be emitted.

With reference to shown in Figure 2, outstanding widely by intercepting face 122j up and down from the end edge of magnetic sheet 110, successfully in the time of the guiding of the rear of arc-extinction device 100, avoid making the atmosphere pneumatolytic of 110 of magnetic sheets by returning of extinguishing arc decomposition gas is the atmosphere gas of easy short circuit to the extinguishing arc decomposition gas during blocking.Intercept the rear that arc-extinction device 100 is approached at outstanding position (scope of representing with ε among Fig. 2), face 122j rear up and down to this, under the situation that does not have member obstruction extinguishing arc decomposition gas to emit, the end edge of magnetic sheet 110 arrives the degree of hiding, and also can even omit.That is, the end edge of magnetic sheet 110 becomes with one side with the end edge that intercepts face 122j up and down.

The size of stria

Secondly, the width D 2 at stria 112a, 112b in the above-mentioned magnetic sheet 110 describes.

Size for the width D 2 that determines stria 112a, 112b, form magnetic sheet 110 by magnetic stainless steel steel and magnetic soft iron, respectively to this, change the width D 2 of stria 112a, 112b and carry out the blocking experiment of little electric current (exciting curent described later and charging current, JIS 4605 criterions).Its result is shown in table one and table two.

Experiment condition is as follows.That is, experimental electrode is stick electrode (fixed electrode 15).Movable electrode is that two of straight swords made of copper ( contact edge 18a, 18b) are the clamping contact-type.The thickness of contact edge 18a, 18b is 4 millimeters.For arc-extinction device, it is stacked that 7 magnetic sheets 110 and 8 extinguishing arc members 120 are cross-bedding.The thickness of magnetic sheet 110 is 1 millimeter, and the thickness of extinguishing arc member 120 is 6.5 millimeters.

The load switch device (3.6/7.2V) that additional disclosure, high-voltage alternating are used is requirement rated value and a performance (JIS JIS 4605 criterions) as shown in Table 3.For example rated current is under the situation of 600A (ampere), and requirement can be interdicted the load current 200 times of 600A, can interdict the charging current each 10 times of 30A exciting curent and 10A respectively.Simultaneously, in the present embodiment, load current is called big electric current, in exciting curent and the charging current, surpasses 5A and be called little electric current below 30A.In exciting curent and charging current, less than the Weak current that is called of 5A.

From the experimental result shown in the table one as seen, be under the situation of magnetic stainless steel steel at magnetic sheet 110, the scope of choosing of the width D 2 of stria 112a, 112b is 0～1.5 millimeter.If the width D 2 of stria 112a, 112b can be interdicted electric arc below 0.3 millimeter corresponding to the full experiment current range (with reference to table three) of JIS (JIS).That is to say, electric arc can be attracted to be fixed in stria 112a, the 112b of magnetic sheet 110.Thereby can draw, the width D 2 of stria 112a, 112b is more little, and is just strong more to the electromagnetic attraction of this stria 112a, 112b inside.

From the experimental result of table two as seen, be under the situation of magnetic soft iron at magnetic sheet 110, the width D 2 of stria 112a, 112b is preferably between 0～1.5 millimeter.

If surpass this scope, stria 112a, 112b can can't fully produce the electromagnetic attraction that drives to this stria 112a, 112b inside, will be difficult to electric arc attraction is fixed on the inside of stria 112a, 112b.In other words, the electric arc in the full experiment current range of JIS (JIS) will attract the stria 112a, the 112b that are fixed in magnetic sheet 110 can become difficult.Though the width D 2 of stria 112a, 112b diminishes, can make the electromagnetic attraction grow that drives to this stria 112a, 112b inside, but the width D 2 of stria 112a, 112b is below 0.3 millimeter the time, is 1 millimeter magnetic sheet 110 for thickness, forms stria 112a, 112b and has any problem.Therefore, the operation along with the electric current blocking may cause stria 112a, 112b obturation.

In the present embodiment, magnetic sheet 110 is formed by magnetic stainless steel steel.Magnetic stainless steel steel are compared with the magnetic soft iron, though electromagnetic attraction is relatively poor, corrosion resistance is preferable.The width D 2 of stria 112a, 112b is 0.5 millimeter.

In addition, in the present embodiment, stria 112a, 112b constitute electric arc described later and induce portion.Stria 112a, 112b constitute grooving.Recess 125 constitutes creepage distance and increases structure.

Further, magnetic sheet path 111a, 111b and extinguishing arc member path 121a, 121b constitute movable electrode by the α of portion.Width constitutes and both has the electric arc of measured length and induce the β of portion than deep trouth 122a, 122b and stria 112a, the 112b of magnetic sheet 110 of movable electrode by the narrow extinguishing arc member 120 of the α of portion.Stria 112a, the 112b of magnetic sheet 110 among flat part 112c, the 112d of portion, be exposed to position in deep trouth 122a, the 122b of extinguishing arc member 120 and this deep trouth 122a, the 122b arcing is restrained the γ of portion.The inside (following obstruct face) of surface of a pair of interval retaining member 124,124 and extinguishing arc member 120 (going up obstruct face) and extinguishing arc member 120, with space 122c, when 122d is communicated with, constitute space part δ via deep trouth 122a, the 122b of extinguishing arc member 120 to the rear of arc-extinction device 100 opening.Then, as shown in Figure 2, in arc-extinction device 100, the α of movable electrode portion, electric arc induce the β of portion, electric arc to restrain the γ of portion and space part δ disposes from movable electrode 18 sides are in upright arrangement in regular turn respectively.

Arcing is induced the stria 122a of the magnetic sheet 110 of the β of portion, the both sides of 122b, keeps set width and is exposed in deep trouth 122a, the 122b of extinguishing arc member 120.For the electric arc of little current range, particularly act on the weak occasion of electric power effectively.That is, by resulting from the flux of magnetic sheet 110 stria 112a, 112b, when electric arc was lured the bosom of guiding to stria 112a, 112b, electric arc was not easy to touch extinguishing arc member 120, suppressed this part and produced the extinguishing arc decomposition gas.Therefore, avoid among stria 112a, the 112b in press liter.For example, though the weak actuating force that produces for electromagnetic force in the little current range, also can suppress to become counter-force in press liter.Therefore, can not hinder the action of electric arc electromagnetic force, this electric arc successfully travels to electric arc and restrains the γ of portion.

The effect of embodiment

Below, at as the extinguishing arc action of the derailing switch of above-mentioned structure describe.

In the input state that Fig. 1 represents with solid line, when the aforesaid operations handle is done open circuit operation, turn right via rotation axis 19 levers 20.Drive link 24 is moved upward thereupon, and movable electrode 18 is that the center turns right with axle 17.When movable electrode 18 separates from fixed electrode 15, between two electrodes 15,18, promptly produce electric arc I respectively between fixed electrode 15 and two contact edge 18a, the 18b.

As shown in Figure 9, around this arc column, because the existence of magnetic sheet 110 distributes one side produce to the flux of drawing close.According to right-hand screw rule and left hand rule, by resulting from the electromagnetic force of magnetic sheet 110, electric arc I is driven the inside (direction of arrow of Fig. 9) of magnetropism plate 110 constantly, through two magnetic sheet path 111a, 111b (with reference to Fig. 2) in portion, and fixed set is in the inside of stria 112a, 112b.

As shown in Figure 2, in extinguishing arc member path 121a, 121b, because magnetic sheet path 111a, 111b all expose, electric arc I can not disturbed by extinguishing arc member 120, and the internal drive of magnetropism plate 110 (speaking by the book stria 112a, 112b) successfully.

In magnetic sheet path 111a, 111b medial margin in opposite directions, at least corresponding to (speaking by the book by the movable electrode 18 when this magnetic sheet path 111a, the 111b, contact edge 18a, 18b) position cause parallel to each other, the electromagnetism intensity of force that results between this position becomes identical.Therefore, electric arc I stably drives the inside of magnetropism plate path 111a, 111b.

The width D 1 of magnetic sheet path 111a, 111b is because when opening and closing, as far as possible little in the hands-off scope of contact edge 18a, 18b, contact edge 18a, 18b are compared by the situation in the notch part that is formed at magnetic sheet 110 front-end edges, and the electromagnetic attraction of magnetropism plate 110 inside increases.The width D 1 of magnetic sheet path 111a, 111b is narrower, and this electromagnetic attraction intensity of force is big more.That is, can pass through in the lump for 2 contact edge 18a, 18b for the width of notch part, the width D 1 of magnetic sheet path 111a, 111b is respectively can be by contact edge 18a, the 18b of a slice.Therefore, attempt to increase electromagnetic attraction.When particularly, the Weak current of 5A degree is open is effective.

Again because the width D 2 of stria 112a, 112b is narrower than the width D 1 of magnetic sheet path 111a, 111b, produce than magnetic sheet path 111a, electromagnetic attraction that 111b is strong at stria 112a, 112b.Therefore, for example, when little electric current such as exciting curent and charging current is open, even arc duration is elongated, constitute magnetic sheet path 111a, 111b and electric arc and induce powerful electromagnetic power on stria 112a, the 112b of the β of portion by being created in respectively, exciting curent electric arc and charging current electric arc are attracted to the depths of this stria 112a, 112b.Then, the contained γ of portion of electric arc that is positioned at this stria 112a, 112b depths fixes (restraining), forms arc zone.

Additional disclosure does not form under the situation of stria 112a, 112b, can't implement the fixedly control of little arc currents such as exciting curent electric arc and charging current electric arc.Because energy shortage makes electric arc I very weak toward the electromagnetic attraction of the depths driving of magnetic sheet path 111a, 111b, along with extinguishing arc decomposition gas pressure in magnetic sheet path 111a, the 111b raises, the front of electric arc I magnetropism plate path 111a, 111b pushes back.Therefore, can't obtain the blocking action of arc stability.

So, electric arc I, is blocked by each magnetic sheet 110 when extending under the fixing state in the bosom that is concentrated to stria 112a, 112b.Effects effectively such as anode, negative electrode decline and cooling, arc voltage sharply raises.The electric arc of arc stability in magnetic sheet 110 is restrained near the γ of portion.

On the one hand, be disposed at alternately on the moving direction of movable electrode 18 by magnetic sheet 110 and extinguishing arc member 120, electric arc I electric arc is contacted with top (surface) and following (the inside) that extinguishing arc member 120 intercepts face 122j up and down, and more the depths of magnetropism plate 110 drives.At this moment, by arc heat, on extinguishing arc member 120 down obstruct face 122j above and below and wall member 123 produce the extinguishing arc decomposition gases, by the elimination of this extinguishing arc decomposition gas promotion electric arc.Particularly when the big electric current that surpasses 30A is open, can more effective playing a role.

That is, to result from the electromagnetic attraction of each big magnetic sheet 110 of energy also strong for the large-current electric arc.Therefore, electric arc I is without a break to the depths of stria 112a, 112b, until the rear side driving of extinguishing arc member 120.Compare with little arc current with Weak current electric arc, because the heat that produces is also many, so the extinguishing arc decomposition gas generation below coming to reach above the self-extinction of arc member 120 is also guaranteed fully.And formation is positioned at electric arc and induces the wall member 123 of deep trouth 122a, the 122b of the β of portion also the generation of extinguishing arc decomposition gas to be had contribution.

Extinguishing arc member 120 is owing to formed by the synthetic resin (being PFA in the present embodiment) that comprises as a kind of fluorine element of negative atom, in the extinguishing arc decomposition gas that arc heat produced, contain the fluorine atom of a kind of negative atom of electronics in the easy absorption electric arc.By the electronics in this fluorine atom absorption electric arc, arc performance (electric current blocking performance) is improved.

When contact edge 18a, 18b passed through extinguishing arc member path 121a, 121b, the inner face of extinguishing arc member path 121a, 121b was exposed under the electric arc.By arc heat, the inner face generation extinguishing arc decomposition gas from extinguishing arc member path 121a, 121b is promoted the elimination of electric arc by this extinguishing arc decomposition gas.Particularly when Weak current is open, act on effectively.

Owing to compare with the large-current electric arc, the Weak current arc energy is considerably less, the magnetic that results from each magnetic sheet 110 also a little less than.Therefore, electric arc can not be driven to the depths of stria 112a, 112b.In this case, come the top generation that reaches following extinguishing arc decomposition gas of self-extinction of arc member 120, low when more open than big electric current.But the caloric value of extinguishing arc decomposition gas reduced when this Weak current was open, and the extinguishing arc decomposition gas that is produced by near the inner face that is positioned at Weak current electric arc point extinguishing arc member path 121a, 121b replenishes.

The extinguishing arc decomposition gas that produces owing to the inner face from extinguishing arc member path 121a, 121b is stranded in deep trouth 122a, the 122b of extinguishing arc member 120.Therefore, the pressure of the extinguishing arc decomposition gas in deep trouth 122a, the 122b raises.Extinguishing arc decomposition gas by rising pressure is contacted with the elimination that electric arc I promotes electric arc.For example can act on effectively in the elongated situation of the arc duration when little electric current such as exciting curent and charging current is open.Exciting curent electric arc and charging current electric arc are the powerful electromagnetic power by stria 112a, 112b, are induced to the depths of this stria 112a, 112b.

That is, common load current is because current waveform and voltage waveform about same one-period, and during electric current 0A, voltage also becomes 0V.Therefore, blocking is easy.But owing to the voltage-phase of exciting curent is spent than current phase slow 90, and the voltage-phase of charging current is spent than current phase leading 90, and voltage reached peak value when promptly electric current was 0A, and therefore blocking is very difficult.In deep trouth 122a, the 122b of extinguishing arc member 120, be contacted with exciting curent electric arc and charging current electric arc by the extinguishing arc decomposition gas that pressure is raise, even being peak value and electric current, voltage also can eliminate electric arc when being at 0.

Further, the width of extinguishing arc member path 121a, 121b is very narrow, the two sides that the inner face (that is plane 123a) of this extinguishing arc member path 121a, 121b approaches contact edge 18a, 18b respectively.Therefore, pass through each extinguishing arc member path 121a, 121b successively by two contact edge 18a, 18b, and obtain the finedraw effect.That is, electric arc I is put between the plane 123a that constitutes extinguishing arc member path 121a, 121b and is become the high state of density, and this kind what is called promotes to eliminate electric arc by the finedraw effect.Occasion at Weak current is effective.

By magnetic sheet 110 and extinguishing arc member 120 on the moving direction of movable electrode 18 with set interleaved ground configuration, prevent that carbide adheres to continuously between the inner face of each extinguishing arc member 120.Therefore, the inner face of extinguishing arc member 120 can not form continuous carbonization face, suppresses the deterioration of arc performance.Further, the surface of extinguishing arc member 120 and the inside form recess 125 respectively, guarantee towards the creepage distance of these extinguishing arc member 120 sides.In addition, the sidepiece at extinguishing arc member 120 forms protuberance 127.Therefore, inhibition electric arc I changes over to towards the side of each magnetic sheet 110, and prevents to take place between the both sides of each magnetic sheet 110 electric arc I.

The extinguishing arc decomposition gas that is produced in extinguishing arc member path 121a, 121b is directed into plane 123a, and derives towards the rear of extinguishing arc member 120.Particularly when big electric current was open, the generation extinguishing arc decomposition gas of following electric current was mainly to flow towards the rear of magnetic sheet 110 and extinguishing arc member 120.By this extinguishing arc decomposition gas, electric arc I dispels towards the rear of magnetic sheet 110 and extinguishing arc member 120, and this electric arc I is diluted more.That is, the effect by the extinguishing arc decomposition gas that flows towards the rear of magnetic sheet 110 and extinguishing arc member 120 dispels electric arc promotes the elimination of electric arc.The outside of wall member 123a (opposing face of plane 123a) becomes the back side that electric arc produces the position, and the metal vapors etc. that is contained in the extinguishing arc decomposition gas adheres to.Therefore, can not form continuous stained, and guarantee the creepage distance of 110 of each magnetic sheets.

Shown in arrow among Fig. 8 a, the extinguishing arc decomposition gas that can derive to extinguishing arc member 120 rears, via the space S (with reference to Fig. 6) of big opening, and the rear of guiding arc-extinction device 100.Simultaneously, the extinguishing arc decomposition gas can not be detained, and when extracted out at extinguishing arc member 120 rears, new atmosphere gas (air) imported.As a result, uprise at the insulation impedance of the atmosphere gas at the deep trouth 122a of extinguishing arc member 120,122b rear and help to eliminate electric arc.Further, by the atmosphere gas (air) of new importing, cooling magnetic sheet 110 also promotes the elimination of electric arc.

In case the extinguishing arc decomposition gas of performance arc eliminator contains metal vapors and free elemental carbon, though the reason that it is lighted for electric arc again, but derive at the rear of magnetropism plate 110 and extinguishing arc member 120 apace by the extinguishing arc decomposition gas, and prevent that electric arc from lighting again.When movable electrode 18 moved to the release position of representing with double dot dash line among the 1st figure, electric arc fully was eliminated, the open circuit release.When closed circuit, the action during with above-mentioned open circuit is gone mutually on the contrary.

The effect of first embodiment

(1) magnetic sheet path 111a, 111b in portion, when open circuit, between fixed electrode 15 and movable electrode 18, be provided with electric arc and induce the β of portion, the electric arc that produces is induced to being formed at the contained γ of portion of arc-extinction device 100 innermost electric arcs.Particularly, in magnetic sheet path 111a, 111b bosom, have among stria 112a, the 112b that both measured length (10mm) cutting had formed, even little electric current also produces powerful electromagnetic force, electric arc is induced to electric arc to restrain the γ of portion apace.Particularly be bound in the arc-extinction device 100, guarantee the time of contact of this electric arc I and the extinguishing arc decomposition gas that produces from extinguishing arc member 120 by electric arc I with little current range.As a result, the electric arc I of little current range also can eliminate apace.So, no matter the electric arc I of big current range and little current range all can be eliminated.In other words, the blocking performance (JIS4650 criterion) of big current range and little current range all can be guaranteed.

(2) extinguishing arc member path 121a, 121b side edge part in opposite directions are provided with the creepage distance increase structure of the creepage distance of guaranteeing extinguishing arc member 120 sides.Particularly, at extinguishing arc member path 121a, 121b side edge part in opposite directions, by surface and the inside along formed wall member 123 of extinguishing arc member path 121a, 121b and extinguishing arc member 120, and the recess 125 that constituted of retaining member 124 at interval, guarantee the creepage distance of extinguishing arc member 120 sides.That is, guarantee creepage distance between each magnetic sheet 110.

(3) bosom of extinguishing arc member path 121a, 121b when forming deep trouth 122a, the 122b with both measured lengths, makes this deep trouth 122a, 122b open at the inboard of extinguishing arc member 120.Therefore, contacting the extinguishing arc decomposition gas that is produced with electric arc I by extinguishing arc member 120 is by extinguishing arc member path 121a, 121b and deep trouth 122a, 122b, and to extinguishing arc member 120, promptly derive at the rear of arc-extinction device 100.At this moment, the extinguishing arc decomposition gas is because by plane 123a guiding, the rear of the extinguishing arc that successfully leads member 120.

(4) extinguishing arc member 120 is provided with the certain retaining member 124 of configuration space maintenance that makes 110 of magnetic sheets.Simultaneously, at extinguishing arc member path 121a, 121b side edge part in opposite directions, by along surface and the inside of the formed wall member of extinguishing arc member path 121a, 121b 123 with extinguishing arc member 120, and the recess 125 that constituted of retaining member 124 at interval, guarantee the creepage distance of extinguishing arc member 120 sides.Then, wall member 123 and the degree that the surface and the inside of extinguishing arc member 120 do not contact with magnetic sheet 110 are respectively set respectively from the outstanding height in surface and the inside of the extinguishing arc member 120 of interval retaining member 124.Therefore, the creepage distance between each magnetic sheet 110 determine become easy.

(5), be provided with protuberance 127 at the side edge part of extinguishing arc member 120.Therefore, can be suppressed at the generation of electric arc between the side edge part of each magnetic sheet 110.

(6) width of above-mentioned stria 112a, 112b is above 0 and below 1.5mm.Therefore, guarantee the electromagnetic attraction of the depths of magnetropism plate 110, even the electric arc I of little current range also can guarantee in stria 112a, 112b.

Second embodiment

Below, describe according to Figure 10～13 pair second embodiment of the present invention.

As Figure 10 and shown in Figure 11, the inner at power supply survey sleeve pipe 13 is provided with arc-extinction device 30.Arc-extinction device 30 be by the formed a plurality of laminal magnetic sheets 40 of magnetic with by the formed a plurality of extinguishing arc members 50 of the synthetic resin material with insulating properties and extinguishing arc, form with set interleaved configuration at the moving direction of movable electrode 18.

Magnetic sheet

As shown in figure 12, magnetic sheet 40 forms W letter stencil shape by magnetics such as steel.In the present embodiment, the thickness d 1 of magnetic sheet 40 is 1 millimeter.At the front-end edge (lateral margins of load-side sleeve pipe 14 sides) of magnetic sheet 40, as can forming with set interval by pair of magnetic plate path 41a, the 41b of contact edge 18a, 18b respectively.

As shown in figure 13, at magnetic sheet path 41a, 41b medial margin in opposite directions, the position that corresponds respectively at least by contact edge 18a, 18b when this magnetic sheet path 41a, the 41b becomes to be parallel to each other, and forms magnetic sheet path 41a, 41b.For the electromagnetic attraction that results from magnetic sheet 40 is increased, the width D 1 of magnetic sheet path 41a, 41b is preferably extremely narrow, in the present embodiment, is wide a little 8 millimeters of thickness (4 millimeters) than contact edge 18a, 18b.

Two magnetic sheet path 41a, 41b in portion, form stria 42a, 42b respectively as grooving.The width D 2 of stria 42a, 42b (with reference to the 13rd figure) is narrower than the width D 1 of magnetic sheet path 41a, 41b, extends to the inside on the direction identical with magnetic sheet path 111a, 111b.The scope of choosing of stria 42a, 42b width D 2 is 0.5 millimeter～2.0 millimeters, and preferably at 0.8 millimeter～1.8 millimeters, optimal scope is 0.8 millimeter～1.2 millimeters.In the present embodiment, the width D 2 of stria 42a, 42b is respectively 1.0 millimeters.

If surpass this scope, the electromagnetic attraction to this stria 42a, 42b depths that results from stria 42a, 42b can't fully obtain, and electric arc can't stably attract to be fixed on the depths of stria 42a, 42b.Under the situation less than this scope, the assembly precision of magnetic sheet 40 has necessity of strict control, reduces to prevent assembling operation efficient.Four jiaos at magnetic sheet 40 form inserting hole 44 respectively.In the rear end of magnetic sheet 40, two 44 of inserting holes form notch part 45.In the present embodiment, stria 42a, 42b constitute the contained portion of electric current.

The extinguishing arc member

As shown in figure 12, extinguishing arc member 50 is to form W word thick plate-like by the synthetic resin material with insulating properties and extinguishing arc (for example tetrafluoroethene co-polymer fluoroplasts such as (PFA)).Then, produce the extinguishing arc decomposition gas by contacting with electric arc.In the present embodiment, the thickness of extinguishing arc member 50 is 6 millimeters.

On the front-end edge (sides of load-side sleeve pipe 14 sides) of extinguishing arc member 50, as can forming with set interval by a pair of extinguishing arc member path 121a, the 121b of contact edge 18a, 18b respectively.The shape of extinguishing arc member path 51a, 51b is consistent with magnetic sheet path 41a, 41b substantially, and its width W 1 is 7 millimeters, and is narrower slightly than the width of magnetic sheet path 41a, 41b.

Two extinguishing arc member path 51a, 51b in portion, form translot 53a, 53b via connectivity slot 52a, 52b respectively.In other words, extinguishing arc member path 51a, 51b be provided with narrow W midway, this narrow W constitutes to move and suppresses structure, is used for suppressing above-mentioned extinguishing arc decomposition gas and moves to the open side of extinguishing arc member 50.

The width W 2 of connectivity slot 52a, 52b is narrower than the width W 1 of extinguishing arc member path 51a, 51b.In the present embodiment, be set at 2.5 millimeters.Translot 53a, 53b are that the bearing of trend that forms with respect to connectivity slot 52a, 52b is the slotted hole shape that the orthogonal direction is extended.Connectivity slot 52a, 52b are communicated with near the central authorities of translot 53a, 53b.Two translot 53a, 53b constitute the balancing gate pit that the thermogenetic extinguishing arc decomposition gas of power supply arc is detained.

Four jiaos at the upper and lower surface of extinguishing arc member 50 form teat 54 respectively, form through hole 55 respectively on each teats 54.The function of each teat 54 is to keep certain as the interval that makes magnetic sheet 40 with extinguishing arc member 50, and remains on the interval of the extinguishing arc member 50,50 that adjoins each other on the moving direction of movable electrode 18.Under magnetic sheet 40 and the stacked mutually state of extinguishing arc member 50, set the projecting height of each teat 54, make the configuration space d3 of the extinguishing arc member 50,50 that on the moving direction of movable electrode 18, adjoins each other become set value (being 3 millimeters in the present embodiment).

Fixture construction

As shown in figure 11, arc-extinction device 30 is for above the fixed electrode 15, and is fixing by supporting member 60.Be arc-extinction device 30 be arranged at supporting member 60 above, and be arranged at above the supporting member 60, in the time of between the prominent a pair of fixed component of establishing 61,61 in set interval,, be pressed into from the top by be based in the pressure member 62,62 of two fixed components, 61,61 upper ends respectively in the inboard.Under the through hole 55 of inserting hole 44 that makes each magnetic sheet 40 and extinguishing arc member 50 state consistent with each other, four jiaos of tops from arc-extinction device 30, insert logical set bolt 63 (with reference to Figure 12) respectively with insulating properties, lock onto on the supporting member 60, by this, arc-extinction device 30 be fixed on supporting member 60 above.

The effect of embodiment

Secondly, the effect to the arc-extinction device of the derailing switch that constituted as described above describes.

Open circuit operation by the aforesaid operations handle makes movable electrode 18 when fixed electrode 15 separates, and between two electrodes 15,18, promptly produces electric arc respectively between fixed electrode 15 and two contact edge 18a, the 18b.Around this arc column, because the existence of magnetic sheet 40 produces the flux distribution that relies on one side.According to right-hand screw rule and left hand rule, by the electromagnetic force that magnetic sheet 40 produces, electric arc is by the internal drive of magnetropism plate 40 constantly, through two magnetic sheet path 41a, 41b (with reference to Figure 12) in portion, and fixed set is in the inside of stria 42a, 42b.

In magnetic sheet path 41a, 41b medial margin in opposite directions, at least corresponding to (strictly speaking by the movable electrode 18 when this magnetic sheet path 41a, the 41b, contact edge 18a, 18b) position cause parallel to each other, the electromagnetism intensity of force that results between this position becomes identical.Therefore, the internal drive of arc stability ground magnetropism plate path 41a, 41b.

The width D 1 of magnetic sheet path 41a, 41b is because when opening and closing, as far as possible little in the hands-off scope of contact edge 18a, 18b, contact edge 18a, 18b are compared by the situation in the notch part that is formed at magnetic sheet 40 front-end edges, and the electromagnetic attraction of magnetropism plate 40 inside increases.The width D 1 of magnetic sheet path 41a, 41b is narrower, and this electromagnetic attraction intensity of force is big more.That is, can pass through in the lump for 2 contact edge 18a, 18b for the width of notch part, the width D 1 of magnetic sheet path 41a, 41b is respectively can be by contact edge 18a, the 18b of a slice.Therefore, attempt to increase electromagnetic attraction.When particularly, the Weak current of 5A degree is open is effective.

Because the width D 2 of stria 42a, 42b is narrower than the width D 1 of magnetic sheet path 41a, 41b, produce than magnetic sheet path 41a, electromagnetic attraction that 41b is strong at stria 42a, 42b.Therefore, for example, when little electric current such as exciting curent and charging current is open, even arc duration is elongated, by resulting from the powerful electromagnetic power on stria 42a, the 42b respectively, exciting curent electric arc and charging current electric arc attract to be fixed to the depths of this stria 42a, 42b, and form arc zone in the depths of this stria 42a, 42b.Additional disclosure does not form under the state of stria 42a, 42b, can't implement the electric arc control of exciting curent electric arc and charging current electric arc etc.

So, electric arc, is blocked by each magnetic sheet 40 when extending under the fixing state in the bosom that is concentrated to stria 42a, 42b.Effects effectively such as anode, negative electrode decline and cooling, arc voltage sharply raises.Near the central authorities of stria 42a, 42b bosom and the back acies of arc stability in magnetic sheet 40.

Interconnected on the moving direction of movable electrode 18 by magnetic sheet 40 and extinguishing arc member 50, electric arc be contacted with the top of extinguishing arc member 50 and below, and more the depths of magnetropism plate 40 drives.At this moment,, produce the extinguishing arc decomposition gas below above extinguishing arc member 50, reaching, promote to eliminate preventing electric arc by this extinguishing arc decomposition gas by arc heat.Particularly when the big electric current that surpasses 30A is open, can act on effectively.

That is, to result from the electromagnetic attraction of each big magnetic sheet 40 of energy also strong for the large-current electric arc.Therefore, electric arc is without a break to the depths of stria 42a, 42b, even the rear side of extinguishing arc member 50 drives, and energetically with the top of extinguishing arc member 50 and below contact.Because compare with little arc current with Weak current electric arc, the heat of generation is also many again, so the extinguishing arc decomposition gas generation below coming to reach above the self-extinction of arc member 50 is also guaranteed fully.

Contact edge 18a, 18b are by when extinguishing arc member path 51a, the 51b, and the inner face of extinguishing arc member path 51a, 51b is exposed under the electric arc.By arc heat, the inner face generation extinguishing arc decomposition gas from extinguishing arc member path 51a, 51b is promoted the elimination of electric arc by this extinguishing arc decomposition gas.Particularly when Weak current is open, can act on effectively.

Compare with the large-current electric arc, the Weak current arc energy is considerably less, the magnetic that results from each magnetic sheet 40 also a little less than.Therefore, electric arc can not be driven to the depths of stria 42a, 42b.In this case, come the top generation that reaches following extinguishing arc decomposition gas of self-extinction of arc member 50, low when more open than big electric current.But the caloric value of extinguishing arc decomposition gas reduced when this Weak current was open, and the extinguishing arc decomposition gas that is produced by near the inner face that is positioned at Weak current electric arc point extinguishing arc member path 51a, 51b replenishes.

When electric arc when the arc zone of the stria 42a of each magnetic sheet 40,42b depths is removed, from the connectivity slot 52a of each extinguishing arc member 50, the end of 52b, promptly the part (to call end wall in the following text) corresponding to connectivity slot 52a, 52b also produces the extinguishing arc decomposition gas from the inwall of translot 53a, 53b.Also promote the elimination of electric arc by this extinguishing arc decomposition gas.For example, when little electric current such as exciting curent and charging current was open, even arc duration is elongated, by resulting from the powerful electromagnetic power on stria 42a, the 42b respectively, exciting curent electric arc and charging current electric arc were attracted the depths that is fixed to this stria 42a, 42b.

The extinguishing arc decomposition gas that produces from above-mentioned end wall is that width W 2 by connectivity slot 52a, 52b is than 1 narrow inhibition of width W of extinguishing arc member path 51a, 51b to extinguishing arc member 50 open side (inboard opposition side) mobile.That is, the extinguishing arc decomposition gas in translot 53a, the 53b produces from this translot 53a, 53b.Therefore, the extinguishing arc decomposition gas storage that is present in translot 53a, the 53b is trapped in translot 53a, the 53b, and by this, the extinguishing arc decomposition gas pressure in translot 53a, the 53b raises.Contact the elimination that promotes electric arc with electric arc by the extinguishing arc decomposition gas that pressure is raise.Particularly effective when exciting curent and charging current opening.

Common load current is because current waveform and voltage waveform about same one-period, and electric current is 0 ampere-hour, and voltage also becomes 0.Therefore, blocking is easy.But exciting curent is because voltage-phase than slow 90 degree of current phase, is spent than current phase leading 90 because of the voltage-phase of charging current again, and voltage was peak value when electric current was 0A, and blocking is difficult.In translot 53a, 53b, be contacted with exciting curent electric arc and charging current electric arc by the extinguishing arc decomposition gas that pressure is raise, be at 0 and also can eliminate electric arc even voltage is peak value and electric current.

Further, the width of extinguishing arc member path 51a, 51b is very narrow, the two sides that the inner face of this extinguishing arc member path 51a, 51b approaches contact edge 18a, 18b respectively.The thickness d 2 of the configuration space d3＜extinguishing arc member of thickness d 1＜extinguishing arc member 50 of magnetic sheet 40 is guaranteed the thickness d 2 more than certain value (with reference to Figure 12) of this extinguishing arc member 50.Therefore, pass through each extinguishing arc member path 51a, 51b successively by two contact edge 18a, 18b, and get the finedraw effect.That is, electric arc is put into to be constituted between extinguishing arc member path 51a, the 5b and becomes the high state of density, and Here it is so-calledly promotes to eliminate electric arc by the finedraw effect.

Dispose with set interleaved ground on the moving direction of movable electrode 18 by magnetic sheet 40 and extinguishing arc member 50, prevent the inner face (inner face of extinguishing arc member path 51a, 51b of each extinguishing arc member 50, the inner face of connectivity slot 52a, 52b, the inner face of translot 53a, 53b) carbide adheres to continuously.Therefore, the inner face of extinguishing arc member 120 can not form continuous carbonization face, prevents the deterioration of arc performance.

Magnetic sheet 40 is to cross it to open on every side entirely with the gap of extinguishing arc member 50, and the extinguishing arc decomposition gas that produces in extinguishing arc member path 51a, 51b can be derived in the outside.Particularly when big electric current is open, follow the generation of electric arc, the extinguishing arc decomposition gas is mainly to flow towards the rear of magnetic sheet 40 and extinguishing arc member 50.By this extinguishing arc decomposition gas, electric arc dispels towards the rear of magnetic sheet 40 and extinguishing arc member 50, and this electric arc is diluted more.

Promptly the effect that electric arc is dispelled by the extinguishing arc decomposition gas that flows towards the rear of magnetic sheet 40 and extinguishing arc member 50 promotes the elimination of electric arc.In case the extinguishing arc decomposition gas of performance arc eliminator contains metal vapors and free elemental carbon, though the reason that it is lighted for electric arc again, but derive at the rear of magnetropism plate 40 and extinguishing arc member 50 apace by the extinguishing arc decomposition gas, and prevent that electric arc from lighting again.When movable electrode 18 moved to the release position of representing with double dot dash line among Fig. 1, electric arc fully was prevented from, the open circuit release.When closed circuit, opposite when moving with above-mentioned open circuit.

The effect of second embodiment

(1) have the magnetic sheet 40 of magnetic sheet path 41a, 41b with by electric arc member 50 with extinguishing arc member path 51a, 51b, formulated at the moving direction of movable electrode 18 with set interleaved.Then, during open circuit, the movable electrode 18 that separates from fixed electrode 15 passes through magnetic sheet path 41a, 41b and extinguishing arc member path 51a, 51b successively.Therefore, electric arc be contacted with extinguishing arc member 50 top and below, and more the depths of magnetropism plate 40 drives.At this moment, because arc heat produces the extinguishing arc decomposition gas below reaching above extinguishing arc member 50, promote to eliminate electric arc by this extinguishing arc decomposition gas.And then raising arc performance.

(2) dispose with set interleaved ground on the moving direction of movable electrode 18 by magnetic sheet 40 and extinguishing arc member 50 equally, prevent the inner face (inner face of extinguishing arc member path 51a, 51b of each extinguishing arc member 50, the inner face of connectivity slot 52a, 52b, the inner face of translot 53a, 53b) carbide adheres to continuously.Therefore, the inner face of extinguishing arc member 120 can not form continuous carbonization face, suppresses the deterioration of arc performance.Even can keep the permanent of arc performance.

(3) dispose with set interleaved ground on the moving direction of movable electrode 18 by magnetic sheet 40 and extinguishing arc member 50 equally, magnetic sheet 40 is to cross it to open on every side entirely with the gap of extinguishing arc member 50, and the extinguishing arc decomposition gas that produces in extinguishing arc member path 51a, 51b can be derived in the outside.Particularly when big electric current is open, follow the generation of electric arc, the extinguishing arc decomposition gas is mainly to flow towards the rear of magnetic sheet 40 and extinguishing arc member 50.By this extinguishing arc decomposition gas, electric arc dispels towards the rear of magnetic sheet 40 and extinguishing arc member 50, and this electric arc is diluted more.Promptly the extinguishing arc decomposition gas that flows by magnetropism plate 40 rears dispels the effect of electric arc, promotes the elimination of electric arc.

(4), form the translot 53a, the 53b that are detained for the extinguishing arc decomposition gas in the bosom of extinguishing arc member path 51a, 51b.Therefore, the thermogenetic extinguishing arc decomposition gas of electric arc is trapped in translot 53a, the 53b, and by this, the pressure of the extinguishing arc decomposition gas in translot 53a, the 53b raises.The extinguishing arc decomposition gas that raises by pressure contacts the elimination that promotes electric arc with electric arc, even improves the performance of extinguishing arc.

(5) thickness of magnetic sheet 40 is d1, and the thickness of extinguishing arc member 50 is d2, when the configuration space of extinguishing arc member 50 is d3, forms magnetic sheet 40 and extinguishing arc member 50 with d1＜d3＜d2 configuration.That is, when the thickness d 2 of extinguishing arc member 50 was guaranteed more than certain value, a plurality of extinguishing arc members 50 were with set arranged spaced.Therefore, pass through each extinguishing arc member path 51a, 51b successively by two contact edge 18a, 18b, and get the finedraw effect.Then, can be to comparing the elimination that the little Weak current of actuating force is done electric arc with large-current electric arc and little arc current.Be that arc performance improves.

(6) width D 1 of magnetic sheet path 41a, 41b is because when opening and closing, as far as possible little in the hands-off scope of contact edge 18a, 18b, contact edge 18a, 18b are compared by the situation in the notch part that is formed at magnetic sheet 40 front-end edges, and the electromagnetic attraction of magnetropism plate 40 inside increases.

(7) form stria 42a, 42b in the bosom of magnetic sheet path 41a, 41b, the width D 2 of stria 42a, 42b is narrower than the width D 1 of magnetic sheet path 41a, 41b.Therefore, produce than magnetic sheet path 41a, electromagnetic attraction that 41b is strong at stria 42a, 42b.For example, when little electric current such as exciting curent and charging current was open, even arc duration is elongated, by resulting from the powerful electromagnetic power on stria 42a, the 42b respectively, exciting curent electric arc and charging current electric arc were attracted the depths that is fixed to this stria 42a, 42b.

(8) end edge at magnetic sheet 40 forms notch part 45.Under the state that magnetic sheet 40 and extinguishing arc member 50 make up, notch part 45 is in more inner position than the end edge of extinguishing arc member 50.Therefore, can prevent that electric arc from removing in the end edge of each magnetic sheet 40.

(9) twolip (doubleblade) type of movable electrode 18 for being constituted by two contact edges 18a, 18b.Therefore, for example different with the occasion of using stick electrode, make the width of magnetic sheet path 41a, 41b become narrower.Even the electromagnetic force that is produced by electric arc also becomes big.

(10) in magnetic sheet path 41a, 41b medial margin in opposite directions, corresponding to the position cause parallel to each other by the movable electrode 18 when this magnetic sheet path 41a, the 41b, the electromagnetism intensity of force that results between this position becomes identical at least.Therefore, the internal drive of arc stability ground magnetropism plate path 41a, 41b.Therefore, the arc performance of arc-extinction device 30 is improved.

(11) in the bosom of magnetic sheet path 41a, 41b, form width than this magnetic sheet path 41a, stria 42a, 42b that 41b is narrow, the width D 2 of this stria 42a, 42b is set in 0.5～2 millimeter the scope.Therefore, can obtain fully resulting from stria 42a, 42b, to the electromagnetic attraction of this stria 42a, 42b depths.Therefore, can prevent that electric arc from returning the open side of magnetic sheet 40.

(12) by extinguishing arc member path 51a, 51b narrow W be set midway, form connectivity slot 52a, 52b.Because the width W 2 of connectivity slot 52a, 52b is narrower than the width W 1 of extinguishing arc member path 51a, 51b, be trapped in the open side that the interior extinguishing arc decomposition gas of translot 53a, 53b returns extinguishing arc member 50.Therefore, be present in mobile be suppressed of extinguishing arc decomposition gas than narrow the W inside of extinguishing arc member path 51a, 51b (promptly being trapped in the extinguishing arc decomposition gas in translot 53a, the 53b) to the open side (inboard opposition side) of extinguishing arc member 50.Then, above-mentioned extinguishing arc decomposition gas is trapped in narrow W inside than extinguishing arc member path 51a, 51b, raises at this inboard extinguishing arc decomposition gas pressure.Therefore, the arc performance of arc-extinction device 30 is improved.

Above-mentioned first and second embodiment also can do following change.

In above-mentioned second embodiment,, remove between the end edge of each magnetic sheet 40 can prevent electric arc, but also can realize by the following method though form notch part 45 by end edge at magnetic sheet 40.That is, do not form the notch part 45 of magnetic sheet 40, and at the end edge of extinguishing arc member 50, form end edge than magnetic sheet 40 more to the outstanding rear end protuberance (omitting among the figure) in outside.The electric arc that also can prevent like this is removed between the end edge of each magnetic sheet 40.

In above-mentioned second embodiment, also can form notch part (omitting among the figure) respectively in the both side edges of magnetic sheet 40 as notch part 45.Or, ratio on the both side edges of extinguishing arc member 50, the more outstanding lateral margin protuberance (omitting among the figure) of both side edges that forms magnetic sheet 40 also can.So, electric arc can not return the side of magnetic sheet 40, can prevent that electric arc from removing between the both side edges of each magnetic sheet 40.When can't interdicting, can prevent that also electric arc from removing between the both side edges of each magnetic sheet 40.

In above-mentioned second embodiment, as shown in figure 14, extinguishing arc member 50 is implemented part excavate, remove unwanted part and also can.That is, extinguishing arc member 50 is main by the wall member 70a that constitutes extinguishing arc member path 51a, 51b, connectivity slot 52a, 52b and translot 53a, 53b, and the reinforcement that is formed at the outside of wall member 70a constitutes with wall 70b.So, different with the occasion of thickness d 2 homogeneous of extinguishing arc member 50, form extinguishing arc member 50 required materials and tail off.Therefore, the material cost of extinguishing arc member 50 is reduced.Even the product cost of arc-extinction device 30 is reduced.Wall member 70a is when big electric current is open, contacts with this large-current electric arc, and as having the electric arc contact member that produces extinguishing arc decomposition gas function.Reinforcement with wall 70b be as have guarantee on the above-below direction shown in Figure 14 with the magnetic sheet of 40 tool insulation functions of magnetic sheet of every set arranged spaced between insulating component.

In above-mentioned second embodiment, though arc-extinction device 30 is used in the derailing switch of twolip type, the derailing switch that is used in twolip type or single-blade formula also can.That is, as shown in figure 15, but in the start of the switch linkage by peripheral operation, with axle 71 be the center rotate rotating insulated sub 72 on, a pair of movable electrode 73,74 is dashed forward with opposite direction and is established.Movable electrode the 73, the 74th is made of each two contact edges or monolithic contact edge.So, in the derailing switch of rotator type, can obtain with second embodiment in (1)～(12) identical effect.

In above-mentioned second embodiment, as shown in figure 16, the switch that arc-extinction device 30 is used in the single-blade type also can.Under this situation, the contact edge 75a by the odd number sheet is constituted owing to movable electrode 75, and magnetic sheet path (omitting among the figure), translot 76a and extinguishing arc member path 76b form each one respectively.Fixed electrode (omitting among the figure) is a for example a pair of fixedly contact shoe with the fixed intervals phase time, can sandwich contact edge 75a between two contact shoes.So, in the derailing switch of single-blade type, can obtain with second embodiment in (1)～(12) identical effect.

In above-mentioned second embodiment, as shown in figure 17, also can in the derailing switch of movable electrode plug pattern on, use arc-extinction device 30 with alternate direction.Under this situation, configuration arc-extinction device 30 becomes with alternate direction the configuration direction of magnetic sheet 40 and extinguishing arc member 50.Flexual electric conductor 77 is fixed on the inner end of load-side sleeve pipe 14, the base portion of movable electrode 78 is fixed on the leading section of this electric conductor 77.Further, the base portion of movable electrode 78 is to be linked to rotation axis 80 via insulating properties connecting rod 79.Therefore, follow the rotation of rotation axis 80, movable electrode 78 is to move with alternate direction.So, in the derailing switch of movable electrode plug pattern on alternate direction, can obtain with second embodiment in (1)～(12) identical effect.

In the arc-extinction device 100 and arc-extinction device 30 relevant with above-mentioned first and second embodiment, also can with carbon dioxide (CO ₂) wait gas extinguishing arc medium to use together.

In above-mentioned second embodiment, extinguishing arc member 50 can use any material that contains halogen family element (electronegativity height) resin.

In above-mentioned second embodiment, with respect to extinguishing arc member path 51a, 51b translot 53a, a 53b are set respectively, as shown in figure 18, with respect to extinguishing arc member path 51a, 51b, on the direction that extinguishing arc member path 51a, 51b extend, also a plurality of translot 53a, 53b can be set respectively.

In above-mentioned second embodiment, as shown in figure 19, also can on the wall of the depths of translot 53a, 53b, form odd number or a plurality of gas extraction path 81 (Figure 19 is 2).But gas extraction path 81 is preferably avoided the above-mentioned end wall of translot 53a, 53b.Push up this end wall by electric arc, the extinguishing arc decomposition gas amount of generation can not lowered.So, the extinguishing arc decomposition gas more successfully flows to the rear of extinguishing arc member 50, thereby improves the effect that electric arc dispels.

In above-mentioned second embodiment, be formed with the translot 53a that connects extinguishing arc member 50 surfaces and inner face, 53b, but only connect translot 53a, the part of 53b also can.Such as, as Figure 20 (a), (b) shown in, translot 53a, 53b are concavity, are communicated with ditch 52a, 52b just extends to form in translot 53a, in the 53b.Nonetheless, also can obtain with second embodiment in (3) effect identical with (11).

In above-mentioned second embodiment, as shown in figure 21, also can omit translot 53a, 53b.That is, only extinguishing arc member path 51a, 51b narrow W be set midway, form connectivity slot 52a, 52b.So, can do inhibition to the open side (inboard opposition side) of extinguishing arc member 50 mobile to being present in than the extinguishing arc decomposition gas of narrow the W inside of extinguishing arc member path 51a, 51b.

In above-mentioned first embodiment,, also can be to the gradually narrow awl of insied width and pull out groove though constitute stria 112a, the 112b of magnetic sheet 110 that little electric current restrains portion for the certain parallel slot of each width D 2.For example shown in Figure 22, the inlet portion width of stria 112a, 112b is 0.8 millimeter, and innermost width is 0.5 millimeter.By from the design of the inlet portion of stria 112a, 112b, can suppress to follow the operation of electric current blocking and the stria 112a that causes, the obturation of 112b to the bosom change width.

When utilization rate uprises, at the inlet portion of stria 112a, 112b, the confusion that the surface of magnetic sheet 110 and the inside become.So because the width D 2 of stria 112a, 112b is very narrow, stria 112a, 112b can be inaccessible.The inlet portion width of stria 112a, 112b, electric arc can be made it become big by under the situation of restraining in little current range, by this, alleviates the obturation of the inlet portion of stria 112a, 112b.But the inlet portion width of stria 112a, 112b also is set in choosing in the scope of above-mentioned stria 112a, 112b width D 2.

In above-mentioned first embodiment, as shown in figure 23, on the medial margin in opposite directions of magnetic sheet path 111a, 111b the rearward end of a pair of wall member 123,123 that is provided with respectively, also guiding wall G can be set respectively.Two guiding wall G open and form to the expansion of the rear of extinguishing arc member 120 respectively.So, can make the extinguishing arc decomposition gas that contains metal vapors diffuse to the rear of extinguishing arc member 120 efficiently.

In above-mentioned first embodiment, as shown in figure 23,, also can on the extended line of deep trouth 122a, 122b, form diffusion teat 126 respectively in the inside of extinguishing arc member 120 side.In Figure 23, diffusion teat 126 forms platform shape column, and this diffusion teat 126 is configured to the rear of extinguishing arc member 120 gradually wide.So, arc gas from metal vapors to extinguishing arc member 120 rears that derive, contain is by 126 diffusions of diffusion teat, to the rear of this diffusion teat 126 return into the time, mix with fresh air and dilute, by this, recover the insulation of atmosphere gas apace.The extinguishing arc decomposition gas rear of can successfully leading.Then, by the diffusion of extinguishing arc decomposition gas, when the insulation resistance of the deep trouth 122a of extinguishing arc member 120, the atmosphere gas at 122b rear improved, the pathway insulation resistance of electric arc I improved and helps to eliminate electric arc.Diffusion teat 126 also can form quadrangular prism shape or triangle column.

In above-mentioned first embodiment, shown in the double dot dash line of Fig. 6, the support portion 132 of supporting member 130 also can be covered from the outside by insulating component Z.Speak by the book, be exposed to the projection 113 of the magnetic sheet 110 of 132 outsides, support portion, Z is covered from the outside by insulating component.So, can avoid between the both side edges of each magnetic sheet 110, producing electric arc.

In above-mentioned first embodiment, extinguishing arc member 120 is to be formed by TFE copolymer (PFA), also can to contain the material that synthetic resin material as the fluorine element of negative atom at random changes extinguishing arc member 120.For example, the material of extinguishing arc member 120 can be polytetrafluoroethylene (PTFE), perfluoroethylene-propylene (copolymer) (FEP), ethylene tetrafluoroethylene copolymer (ETFE), poly-ly fluoridizes in inferior ethene (PVdF), the daiflon (PCTFE) any.In addition, also can be polytrifluorochloroethylene, ethylene fluoride, trifluoro-ethylene, fluoridize in inferior ethene and the hexafluoro propylene any.Negative atom also has for example chlorine element, bromo element and element sulphur etc. except that aforesaid fluorine element.The material of extinguishing arc member 120 can be selected from the material that comprises these negative atoms, and arc heat makes extinguishing arc member 120 emit negative atom, by the atom in these negative atomic adsorption electric arcs, thereby improves arc performance.

In above-mentioned first embodiment, magnetic can be formed by the ferritic stainless steel steel of the carbon of chromium that contains 9.0-16.0 weight % and 0.006-0.020 weight %.

In above-mentioned first embodiment, also undermost extinguishing arc member 120 closely can be linked to each other with the top of base portion 131.

In above-mentioned first embodiment, also can form single or multiple insulation walls, and allow this insulation wall and undermost extinguishing arc member 120 overlap at the inner face of base portion.

In above-mentioned first embodiment, also can prevent extracting apparatus in the leading section setting of engaging teat 140.

In above-mentioned first embodiment, also can on the periphery of extinguishing arc member path 121a, the 121b of undermost extinguishing arc member 120, the finedraw arc-extinction device be set.

In above-mentioned first embodiment, also can cover base portion 131 inner faces of supporting member 130 by the interval retaining member 124 of undermost extinguishing arc member 120.

In above-mentioned first and second embodiment,, also can be used in the high pressure breaker though arc-extinction device 100 and arc-extinction device 30 are to be used in high-voltage alternating load switch device respectively.

In above-mentioned first and second embodiment, extinguishing arc member 120,50 and magnetic sheet the 110, the 40th fit together after being made into respectively, and shown in Figure 24 a, 24b, extinguishing arc member 120 is that integrally-built assembly also can with magnetic sheet 110.Thus, can suitably select the stacked number of extinguishing arc member 120,50 and magnetic sheet 110,40 to assemble.

The 3rd embodiment

Below, the 3rd embodiment at the arc-extinction device 100A that the present invention is embodied as derailing switch describes according to Figure 25 to Figure 39.And the member identical with first embodiment gives identical member numbering, and the repetitive description thereof will be omitted.

As shown in figure 25, on the 12a of two side in opposite directions, the 12b of the body housing 12 of derailing switch 11, mains side sleeve pipe 13 and load-side sleeve pipe 14 are that the every phase place of three phase places connects relatively respectively and supports (only representing a phase place among Figure 25).On the inner of mains side sleeve pipe 13 (front end of fixed electrode 15), arc-extinction device 100A is by fixing fixing with metal 318.The contact rod 16 of load-side sleeve pipe 14 via axle 17, rotatably is supported on the base end part of movable electrode 18.Shown in double dot dash line among Figure 26, movable electrode 21 is a pair of contact edge 21a, the 21b with parallel flat shape.

On the one hand, as shown in figure 25, an end of drive link 24 rotatably is connected in the front end of lever 20, and the other end of this drive link 24 rotatably is connected near the central authorities of movable electrode 21.Therefore, during operation aforesaid operations handle, movable electrode 21 is via aforementioned link mechanism, rotating shaft 19, lever 20 and drive link 24, be the center mobile between the input position shown in the 25th figure double dot dash line and the release position shown in the identical solid line with axle 17.

Drive link

Secondly, be described in detail at drive link 24.As shown in figure 37, drive link 24 is to be formed by for example big synthetic resin of insulation endurance of polybutene terephthalic acid (TPA) and nylon etc.At the outer peripheral face of drive link 24, on the face of the face of fixed electrode 15 sides and rotation axis 19 sides, form a plurality of recesses 31 respectively.By this, guarantee creepage distance between the linking part of the linking part of movable electrode 21 sides of drive link 24 and lever 20 sides.

As Figure 37 and shown in Figure 38, on the outer peripheral face of drive link 24, be on two faces of orthogonal with respect to the face that forms each recess 31, with alternate obstruct face 32 between out-phase on the direction (left and right directions among Figure 38) outstanding and form.On the side of drive link 24 and two with fixed electrode 15 sides of alternate obstruct face 32, in polymerization place of drive link 24 and movable electrode 21, be equipped with air-supply member 33 and cross two lateral borders with alternate obstruct face 32,32.Air-supply member 33 forms orthogonal with respect to two with alternate obstruct face 32,32.

Shown in the double dot dash line of Figure 25, in the input state (closed circuit state) of derailing switch 11, are the belows that lay respectively at arc-extinction device 100A with alternate obstruct face 32 and air-supply member 33.And for example shown in the solid line of Figure 25, in the open state (open-circuit condition) of derailing switch 11, when being positioned at fixed electrode 15 and rotation axis 19 with alternate obstruct face 32, air-supply member 33 is the central authorities corresponding to arc-extinction device 100A.Air-supply member 33 moves to the release position shown in the solid line from the input position shown in the double dot dash line of Figure 25, by this, produces the wind to arc-extinction device 100A side.By blast, when open circuit, the electric arc that is produced between fixed electrode 15 and the movable electrode 21 is urged the depths to arcing device 100A.So, set the length of drive link 24, with the position of the width and the air-supply member 33 of alternate obstruct face 32.

Arc-extinction device

Secondly be described in detail at arc-extinction device 100A.Shown in Figure 27～29, arc-extinction device 100A has a plurality of magnetic sheets 110 that magnetic forms plate body, and by the formed a plurality of extinguishing arc members 120 of the synthetic resin material with insulating properties and extinguishing arc.Each magnetic sheet 110 and each extinguishing arc member 120 form with set interleaved configuration on the moving direction of movable electrode 21.Each magnetic sheet 110 and each extinguishing arc member 120 are to be disposed at respectively between the pair of supporting members 130 supporting in the lump.Below describe according to the order of supporting member 130, magnetic sheet 110 and extinguishing arc member 120.

Supporting member

At first supporting member 130 is described.Shown in Figure 27～30, supporting member 130 also has with fixing and is fixed in the base portion 131 of fixed electrode 15 and support portion 132 with respect to 131 one-tenth oblique shapes of same base portion with metalwork 318.

As shown in figure 27, on base portion 131, form inclined plane 131a.Connect airtight on the 131a of inclined plane below the side edge part of undermost extinguishing arc member 120 (protuberance 127 described later).The front side side edge part of undermost extinguishing arc member 120 (the front side side edge part of protuberance 127 described later) connects airtight on the rear side lateral margin of support portion 132.By this, suppress to be exposed to electric arc I and the extinguishing arc decomposition gas that produces from extinguishing arc member 120 from arc-extinction device 100A internal leakage.

And for example shown in Figure 30, on the medial surface of base portion 131, form insulation wall 135.Insulation wall 135 forms parallel with two supporting members, 130,130 magnetic sheets that supported 110 and extinguishing arc member 120.As shown in figure 39, insulation wall 135 is somes of the side edge part (protuberance 127 described later) of being arranged to be overlapped in undermost extinguishing arc member 120 in the extinguishing arc member 120 that is supported in two supporting members 130,130.By this, suppress the external leaks of extinguishing arc decomposition gas to two supporting members, 130 sides of arc-extinction device 100A.Further, two supporting members 130,130 are disposed at the front face side (being the open side of aftermentioned movable electrode by the α of portion) of arc-extinction device 100A respectively.Be disposed at from position far away, arc-extinction device 100A back by two supporting members 130,130, the extinguishing arc decomposition gas that suppresses to emit to the rear of this arc-extinction device 100A returns and causes the stained of two supporting members 130,130.

Magnetic sheet

Secondly, magnetic sheet 110 is described.Shown in figure 32, magnetic sheet 110 is to form W letter stencil shape by magnetic.In the present embodiment, use the stainless steel steel of ferrite (ferrite) as magnetic.The embryo material of ferritic stainless steel steel itself has rust-proof effect, and the performance that produces electromagnetic force is also good.Magnetic sheet 110 is the sheet material of ferritic stainless steel steel system to be beaten by press pull out, and afterwards, is shaped by annealing.So-called annealing is after steel both is heated to fixed temperature, by slowly cooling, remove press add put on man-hour magnetic sheet 110 that residual stress caused was crooked.Be contained in the chromium (Cr) in the ferritic stainless steel steel and the amount of carbon (C), describe in detail in the back.

At the front-end edge (lateral margins of load-side sleeve pipe 14 sides) of magnetic sheet 110, as can forming with set interval by pair of magnetic plate path 111a, the 111b of contact edge 21a, 21b respectively.Two magnetic sheet path 111a, 111b form more distolateral width (length of the 32nd figure left and right directions) the narrow awl of healing respectively and pull out shape and form breach.

Two magnetic sheet path 111a, 111b in portion, form stria 112a, 112b respectively as grooving.Two grooving 112a, 112b are equidirectional with magnetic sheet path 111a, 111b respectively, and promptly inner (rear end side of magnetic sheet 110) extends.The bosom of two magnetic sheet path 111a, 111b and two grooving 112a, 112b are continuous smoothly.Two grooving 112a, 112b are the certain parallel slot of width.

Front end junction in the both side edges of magnetic sheet 110 forms a pair of projection 113 respectively.Shown in Figure 30 and 31, two projections 113 are the magnetic sheet supported holes 133 that are sticked in two supporting members 130 respectively from the inboard.Under this state, with the supporting member 130 of projection 113 ledge, squeeze into chisel from the outside and make plastic deformation from lateral surface, by this, this projection 113 can't be extracted from magnetic sheet supported hole 133.

The extinguishing arc member

Secondly, extinguishing arc member 120 is illustrated.As Figure 26 and shown in Figure 28, on the front-end edge (sides of load-side sleeve pipe 14 sides) of extinguishing arc member 120, as can forming with set interval by a pair of extinguishing arc member path 121a, the 121b of contact edge 21a, 21b respectively.Bosom at two extinguishing arc member path 121a, 121b forms deep trouth 122a, 122b respectively.Deep trouth 122a, 122b similarly extend in parallel with above-mentioned grooving 112a, 112b to inner (that is the end edge side of extinguishing arc member 120) with extinguishing arc member path 121a, 121b.The width of deep trouth 122a, 122b is narrower than the width of extinguishing arc member path 121a, 121b.

As shown in figure 33, in the inside of extinguishing arc member 120, on extinguishing arc member 121a, 121b medial margin in opposite directions, be equipped with electric arc contact wall (wall member) 123 respectively.The inner face of electric arc contact wall 123 forms continuous plane 123a.Electric arc contact wall 123 (strictly speaking, the plane 123a of electric arc contact wall 123) when big electric current is open, contacts with this large-current electric arc, and as having the electric arc contact member that produces extinguishing arc decomposition gas function.

Opening port

Shown in Figure 29,30 and 33,, form the opening port 123b of extinguishing arc decomposition gas respectively in the bosom of each electric arc contact wall 123.Each opening port 123b becomes same column respectively and forms breach.The extinguishing arc decomposition gas that is exposed in the electric arc to be produced by extinguishing arc member 120 is by each opening port 123b and to side dissipation.

Electric arc ends wall portion

As shown in figure 33, in the inside of extinguishing arc member 120, on deep trouth 122a, the 122b medial margin in opposite directions, form block heavy wall 324 respectively.The front side of each heavy wall 324 (side of extinguishing arc member path 121a, 121b side) is in the face of extinguishing arc member path 121a, 121b, with respect to the central shaft formation orthogonal of extinguishing arc member path 121a, 121b.Therefore, when Weak current was open, the electric arc I of this Weak current scope moving of (rear end side of extinguishing arc member 120) was to the inside limited by the side of heavy wall 324 front.That is, the front side of heavy wall 324 is to end wall portion and have the function that restriction electric arc moves to the inside as electric arc.In other words, two electric arc member path 121a, 121b in portion, form electric arc respectively and end the 324a of wall portion.Electric arc I by the Weak current scope is stranded in electric arc to be ended near the 324a of wall portion, and this electric arc ends the 324a of wall portion and fused by arc heat and produce the extinguishing arc decomposition gas.

The interval retaining member

Shown in Figure 29 and 30, identical with first embodiment, in the surface and the inside of extinguishing arc member 120, between the lateral border of outermost two electric arcs contact wall 123 and extinguishing arc member 120 in each electric arc contact wall 123, retaining member 124 is given prominence to respectively and is formed at interval.

Recess

Shown in Figure 29 and 33, in the inside of extinguishing arc member 120, the surface and the inside that are contacted wall 123 and interval retaining member 124 and extinguishing arc member 120 by electric arc form recess 125.

Blocking part up and down

In addition, extinguishing arc member 120 is described.As shown in figure 33, deep trouth 122a, the 122b of extinguishing arc member 120 are via space 127a, the 127b rear end side opening to arc-extinction device 100A.In extinguishing arc member 120, the position of heavy wall 324 rear end side is the blocking part up and down 128 for the insulation of the above-below direction of guaranteeing magnetic sheet 110.Shown in Figure 34 a, in blocking part 128 up and down, form heavy section 128a in the rear end side of electric arc contact wall 123.This heavy section 128a is gradually little and form awl and pull out face 128b to the rear end side wall thickness of extinguishing arc member 120.By this structure, when dealing with electric arc consumption, the extinguishing arc decomposition gas can rearward successfully be emitted.

Shown in Figure 26～27, under each magnetic sheet 110 and each extinguishing arc member 120 are supported on state between the supporting member 130,130, each up and down blocking part 128 become big outstanding from the end edge of magnetic sheet 110 respectively.By this, the extinguishing arc decomposition gas during blocking can successfully be guided the rear to arc-extinction device 100A.Extinguishing arc decomposition gas returning in arc-extinction device 100A is suppressed simultaneously, and avoids owing to this returns the easy short circuit of atmosphere air-capacitor that causes 110 of magnetic sheets.

Protuberance

As shown in figure 26, be positioned at the rear end side of extinguishing arc member 120 both side edges, form protuberance 127 respectively.Under magnetic sheet 110 and extinguishing arc member 120 were supported on state between the supporting member 130,130, protuberance 127 was outstanding respectively from the both side edges of magnetic sheet 110, sets the outstanding length of this protuberance 127.

The engaging teat

In the front of extinguishing arc member 120 both side edges, form engaging teat 140 respectively.As shown in figure 29, top and above-mentioned protuberance 127 top of engaging teat 140 is positioned at same plane substantially.

The engaging teat prevent extract

As shown in figure 35, in engaging teat 140, the top in the short side that is positioned at opposition side forms sidepiece respectively and pulls out only teat 141.With reference to shown in Figure 36, on engaging teat 140, be arranged in two long side surfaces of opposition side, the outside junction of superposed long side surface forms top and pulls out only teat 142.Engaging teat 140 inserts from the inboard when the extinguishing arc member supports hole 134, and the inner face in this extinguishing arc member supports hole 134 is led to sidepiece and pulls out that only the only taper surface 142a of teat 142 is pulled out on the taper surface 141a and the top of teat 141.Then, sidepiece pulls out only teat 141 and top and only pulls out teat 142 by extinguishing arc member supports hole 134, pull out only teat 141 and top by this sidepiece and pull out the lateral surface that teat 142 only is sticked in supporting member 130 (support portion 132), engaging teat 140 can prevent to extract from extinguishing arc member supports hole 134.

The position relation of magnetic sheet and extinguishing arc member

As shown in figure 26, when arc-extinction device 100A did the plane sight in the stacked direction of extinguishing arc member 120 and magnetic sheet 110, the position relation of deep trouth 122a, the 122b of extinguishing arc member 120 and grooving 112a, the 112b of magnetic sheet 110 was as described below.That is, in deep trouth 122a, 122b, when grooving 112a, the 112b of magnetic sheet 110 all located, the some of magnetic sheet 110 was exposed to the bosom of this deep trouth 122a, 122b.In the innermost inboard of two extinguishing arc member path 121a, 121b, magnetic sheet 110 is exposed to inboard (front of extinguishing arc member 120).Therefore, the electric arc I that results between fixed electrode 15 and the movable electrode 21 is each extending part that is bound to magnetic sheet 110 corresponding to this breaking current.That is, the electric arc I of big electric current and little current range is bound to the contained γ of portion (aftermentioned) of the electric arc that is positioned at two deep trouth 122a, the innermost magnetic sheet 110 of 122b.Weak current is bound near the electric arc fixed part 150 of the magnetic sheet 110 the bosom that is positioned at two extinguishing arc member path 121a, 121b.

The material of magnetic sheet

Secondly, the material to above-mentioned magnetic sheet 110 is described in detail.

The material of magnetic sheet generally uses iron material in the prior art.Because iron material cheapness and coercive force are little, when blocking, can produce very suitable electromagnetic force.Yet the corrosion resistance of iron material is little, does the necessity of electroplating processing because the generation surface of iron rust has.The good material of cheapness and corrosion resistance particularly, the ferritic stainless steel steel of SUS430 (JIS) representative are known by popular, but coercive force is excessive, and the blocking that is not suitable for becoming derailing switch is moved and become its shortcoming.At this, this case applicant is conceived to the chromium (Cr) of the stock of ferritic stainless steel steel and the amount of carbon (C), from the characteristic of possessing these stocks and with the slightly equal price of iron material and have the various ferritic stainless steel steel of magnetic (coercive force) selected.And for the excellent hyperloy of magnetic (permalloy) (nickel and iron are the magnetic alloy of the high magnetic susceptibility of principal component), more than price is very high and corrosion resistance is poor, so get rid of outside selected material.

At first, be the amount of decision chromium (Cr) and carbon (C), be made into the magnetic sheet 110 of same shape, carry out the blocking test of little electric current at each by the different test portion 1～test portion 9 of the amount of chromium and carbon.In this example, breaking current is 10A (ampere).Its result is shown in table four.In this table four, zero expression blocking is good, and * expression blocking is bad.

Experimental condition is as follows.That is, test electrode is configured to stick electrode (fixed electrode 15).Movable electrode is that two of straight swords made of copper ( contact edge 21a, 21b) are the clamping contact-type, and the thickness of contact edge 21a, 21b is 4 millimeters.Arc-extinction device is to use magnetic sheet 110 and the extinguishing arc member 120 board-like arc-extinction device of magnetic in four sections stacked gas alternately.The thickness of magnetic sheet 110 is 1 millimeter, and the height of extinguishing arc member 120 is 6.5 millimeters.

From the result of the test shown in the table four, the material of magnetic sheet 110 is under the situation of test portion 1～test portion 6, and little arc current is had good barrier property.The material of magnetic sheet 110 is under the situation of test portion 7～test portion 9, to little arc current is then difficult good barrier property is arranged.Therefore, magnetic sheet 110 is preferable with the former of ferritic stainless steel steel institute of the carbon of the chromium that contains 9.0～16.0 weight % and 0.006～0.030 weight %.So, can do good blocking respectively to little arc current and Weak current electric arc.

The material of magnetic sheet 110, particularly the few person of phosphorus content is preferable in the ferritic stainless steel steel.This is that along with the increase of phosphorus content, the magnetic of magnetic sheet 110 and corrosion resistance can deteriorations because the annealed high temperature processing carbon that waits forms carbide (as chromium carbide) easily.Therefore, in the present embodiment, preferable by the former of ferritic stainless steel steel institute of the carbon of chromium that contains 9.0～16.0 weight % and 0.006～0.020 weight %.

And for example shown in Figure 26, in the present embodiment, magnetic sheet path 111a, 111b and extinguishing arc member path 121a, 121b constitute movable electrode by the α of portion.Width is induced the β of portion than movable electrode by deep trouth 122a, the 122b of the narrow extinguishing arc member 120 of the α of portion and grooving 112a, the 112b arcing of magnetic sheet 110.In the innermost flat part of grooving 112a, 112b of magnetic sheet 110, the position arcing that is exposed to deep trouth 122a, the 122b of extinguishing arc member 120 is restrained the γ of portion.

The effect of embodiment

Secondly, the effect to the arc-extinction device of the derailing switch of above-mentioned structure describes.

In the input state shown in the double dot dash line shown in Figure 25, when the aforesaid operations handle is done open circuit operation, be that middle heart lever 20 is towards rotating clockwise with rotation axis 19.Then, drive link 24 is moved upward, and movable electrode 21 is that the center is towards rotating clockwise with axle 17.When movable electrode 21 separates from fixed electrode 15, between this fixed electrode 15 and the movable electrode 21, promptly produce electric arc I (with reference to the 32nd figure) between fixed electrode 15 and two contact edge 21a, the 21b respectively.

Shown in figure 32, around this arc column, because the existence of magnetic sheet 110 produces the flux distribution that relies on one side.According to right-hand screw rule and left hand rule, by the electromagnetic force that results from magnetic sheet 110, electric arc I is by the inside of magnetropism plate 110 (direction of arrow among the 32nd figure) driving constantly, through two magnetic sheet path 111a, 111b (with reference to the 26th figure) in portion, and fixed set is in the inside of stria 112a, 112b.Electric arc I, is blocked by each magnetic sheet 110 when extending under the fixing state in the bosom that is concentrated to stria 112a, 112b.Effects effectively such as anode, negative electrode decline and cooling, arc voltage sharply raises.When movable electrode 21 moved to the release position of representing with solid line among the 25th figure, electric arc fully was prevented from, and the open circuit action finishes.When closed circuit, the action during contrary above-mentioned open circuit and going.

The blocking of large-current electric arc

Secondly, blocking is for example described above the effect of the arc-extinction device when the big electric current of 30A (ampere).

Be disposed at alternately on the moving direction of movable electrode 21 by magnetic sheet 110 and extinguishing arc member 120, electric arc I electric arc is contacted with top (surface) and following (the inside) of the face that intercepts up and down 128 of extinguishing arc member 120, and more the depths of magnetropism plate 110 drives.At this moment, by arc heat, above the face that intercepts up and down 128 of extinguishing arc member 120 and below and electric arc contact wall 123 produce the extinguishing arc decomposition gases, prevent electric arc by this extinguishing arc decomposition gas promotion.

That is, to result from the electromagnetic attraction of each big magnetic sheet 110 of energy also strong for the large-current electric arc.Therefore, the electric arc I of big electric current is not fixed in electric arc fixed part 150, and without a break to the depths of stria 112a, 112b, even the rear side of extinguishing arc member 120 drives.Compare with little arc current with Weak current electric arcs such as exciting curent and charging currents, because the heat that produces is also many, so the extinguishing arc decomposition gas generation below coming to reach above the self-extinction of arc member 120 is also guaranteed fully.Simultaneously, contact wall 123 and heavy wall 324 also have contribution to the generation of extinguishing arc decomposition gas.

Extinguishing arc member 120 is owing to formed by the synthetic resin (being PFA in the present embodiment) that comprises as a kind of fluorine element of negative atom, in the extinguishing arc decomposition gas that arc heat produced, contain fluorine atom with a kind of negative atom of conduct of electronics in the easy absorption electric arc.By the electronics in this fluorine atom absorption electric arc, arc performance (electric current blocking performance) is improved.

By magnetic sheet 110 and extinguishing arc member 120 on the moving direction of movable electrode 21 with set interleaved ground configuration, prevent that carbide adheres to continuously between the inner face of each extinguishing arc member 120.Therefore, the inner face of extinguishing arc member 120 can not form continuous carbonization face, suppresses the deterioration of arc performance.Further, the surface of extinguishing arc member 120 and the inside form recess 125 respectively, guarantee fully towards the creepage distance of these extinguishing arc member 120 sides.In addition, the sidepiece at extinguishing arc member 120 forms protuberance 127.Therefore, inhibition electric arc I changes over to towards the side of each magnetic sheet 110, and prevents to take place between the both sides of each magnetic sheet 110 electric arc I.

As previously mentioned, the extinguishing arc decomposition gas that is produced in extinguishing arc member path 121a, 121b (promptly, contact the extinguishing arc decomposition gas that wall 123 is produced from the top and bottom and the electric arc that intercept face 128 up and down) be directed into contact wall 123, and derive towards the rear of extinguishing arc member 120.Particularly when big electric current is open, follow the generation of electric arc I, the extinguishing arc decomposition gas is mainly to flow towards the rear of magnetic sheet 110 and extinguishing arc member 120.By this extinguishing arc decomposition gas, electric arc I dispels towards the rear of magnetic sheet 110 and extinguishing arc member 120, and this electric arc I is more diluted.Promptly the effect that electric arc is dispelled by the extinguishing arc decomposition gas that flows towards the rear of magnetic sheet 110 and extinguishing arc member 120 promotes the elimination of electric arc.Again because the outside of contact wall 123 becomes the back side that electric arc produces the position, the metal vapors etc. that is contained in the extinguishing arc decomposition gas adheres to.Therefore, can not form continuous stained, and guarantee the creepage distance of 110 of each magnetic sheets.

Shown in arrow among Figure 33, the extinguishing arc decomposition gas that can derive to extinguishing arc member 120 rears, via the space S (with reference to the 31st figure) of big opening, and the rear of guiding arc-extinction device 100A.The extinguishing arc decomposition gas is extracted out to the rear of extinguishing arc member 120, and discharges this rear.Therefore, the discharge of extinguishing arc decomposition gas is successfully carried out, and when this extinguishing arc decomposition gas was discharged smoothly to the rear of arc-extinction device 100A, new atmosphere gas (air) imported the inside of arc-extinction device 100A.

As a result, uprise at the insulation impedance of the atmosphere gas at the deep trouth 122a of extinguishing arc member 120,122b rear and help to eliminate electric arc.Further, by the atmosphere gas (air) of new importing, cooling magnetic sheet 110 also promotes the elimination of electric arc.In case the extinguishing arc decomposition gas of performance arc eliminator contains metal vapors and free elemental carbon, though its reason of lighting again for electric arc is passed through the rear derivation of magnetropism plate 110 and extinguishing arc member 120 apace of extinguishing arc decomposition gas.Then, the atmosphere gas of the inside of arc-extinction device 100A is substituted by new atmosphere gas and recovers insulation, prevents that electric arc from lighting again.

The blocking of little arc current

Secondly, the effect of the arc-extinction device 100A during as little electric current below the 30A such as charging current and exciting curent describes to blocking.

As shown in figure 26, in extinguishing arc member path 121a, 121b, because magnetic sheet path 111a, 111b all expose, electric arc I can not hindered by extinguishing arc member 120, by following movable electrode 21 centrifugal force that rotates and the sucking action that results from the electromagnetic force of magnetic sheet 110, the inside of magnetropism plate 110 (speaking by the book magnetic sheet path 111a, 111b) drives smoothly.Again because the width of grooving 112a, 112b is narrower than the width of magnetic sheet path 111a, 111b, produce on grooving 112a, 112b than magnetic sheet path 111a, electromagnetic attraction that 111b is strong, exciting curent electric arc and charging current electric arc are attracted to the inside of this grooving 112a, 112b.

The electric arc I energy of little current range is than large-current electric arc little energy, and when blocking, extinguishing arc decomposition gas generation reduces when more open than big electric current.But the electric arc I of this little current range induces the β of portion to travel to fast to be positioned at the innermost electric arc of arc-extinction device 100A to restrain the γ of portion by above-mentioned electric arc, and restrains among the γ of portion at this electric arc and to be fixed.That is, this electric arc is restrained the γ of portion becomes arc zone.Heavy wall 324 (with reference to 33rd figure) and the heavy section 128a (with reference to 34a figure) of the electric arc I of little electric current by being contacted with the extinguishing arc member 120 of position around electric arc is restrained the γ of portion respectively will successfully emit from the extinguishing arc decomposition gas of this heavy wall 324 and this heavy section 128a.Be added in the extinguishing arc decomposition gas that electric arc induces the β of portion to be produced by the extinguishing arc decomposition gas of restraining the γ of portion generation at this electric arc, the extinguishing arc decomposition gas pressure in deep trouth 122a, the 122b of extinguishing arc member 120 raises.The extinguishing arc decomposition gas that pressure raises is contacted with the electric arc I of little galvanic areas, thereby eliminates this electric arc I.

The blocking of Weak current electric arc

Secondly, in little current range, describe at the effect of the arc-extinction device 100A of the Weak current below the blocking 5A.

The Weak current arc energy is considerably less, the electromagnetic force that results from each magnetic sheet 110 also a little less than.Therefore, the blocking key element is the stable generation that is equilibrated at the extinguishing arc decomposition gas of Weak current electric arc.Weak current electric arc, the centrifugal force by following movable electrode rotation and a small amount of and result from the flux of magnetic sheet 110 successfully drives the inside toward magnetic sheet 110 (speaking by the book grooving 112a, 112b).At this moment, follow the moving of the open direction of the air-supply member 33 of drive link 24, the help of the blast that is produced, Weak current electric arc I is pressed towards the depths of arc-extinction device 100A (movable electrode is by the α of portion).When this Weak current electric arc I is ended the 324a of wall portion restriction and moved toward the depths by electric arc, be fixed at electric arc fixed part 150.Therefore, guarantee the electric arc set time in the bosom (periphery of electric arc fixed part 150) of extinguishing arc member path 121a, 121b.As a result, guarantee the electric arc I of Weak current scope and the time of contact that electric arc ends the 324a of wall portion, even the Weak current electric arc of little energy, the extinguishing arc decomposition gas that ends the 324a of wall portion from this electric arc also can stably produce.Even, stablize the blocking characteristic of arc-extinction device 100A.

This extinguishing arc decomposition gas can not be trapped in deep trouth 122a, the 122b of extinguishing arc member 120, extracts out to side apace from the opening port 123b that is formed at electric arc contact wall 123 inboards, discharges from the rear of arc-extinction device 100A then in outside (with reference to the 33rd figure).Therefore, the old extinguishing arc decomposition gas etc. that suppresses to contain metal vapors etc. is stranded in the depths of extinguishing arc member path 121a, 121b and deep trouth 122a, 122b, the extinguishing arc decomposition gas that the sustainable supply arc performance is high.Therefore, the replacement of extinguishing arc decomposition gas becomes smoothly, suppresses electric arc and lights.

So, as the arc-extinction device 100A of present embodiment, can significantly shorten breaking time to the electric arc I of Weak current scope.For vast scope, guarantee the generation of stable electrical magnetic force, thereby improve the blocking performance from big current range to little current range.

The effect of the 3rd embodiment

(1) in the bosom of magnetic sheet path 111a, 111b, form width than this magnetic sheet path 111a, grooving 112a, 112b that 111b is narrow, by this, being formed in open circuit the time will result from the electric arc that the electric arc I between fixed electrode 15 and the movable electrode 21 induces to the depths and induce the β of portion.Induce on the depths extended line of the β of portion at electric arc simultaneously, be provided with the fixing electric arc of electric arc I of inducing the β of portion to be induced on this electric arc and restrain the γ of portion.Therefore, particularly when little electric current interdicts,, the extinguishing arc decomposition gas is produced effectively for the electric arc I of little current range.Even, can finish the blocking of little electric current fast.

Simultaneously this extinguishing arc member path 121a, 121b in portion, when forming electric arc with this extinguishing arc member path 121a, 121b orthogonal and end the 324a of wall portion, it is more inside and form deep trouth 122a, the 122b that electric arc is pressed into usefulness to end the central authorities of the 324a of wall portion from this electric arc.Then, end the 324a of wall portion periphery at the electric arc of extinguishing arc member 120, magnetic sheet 110 inboards are even be exposed in extinguishing arc member path 121a, the 121b.Therefore, when Weak current interdicts, cause the arc energy deficiency, the electric arc I of Weak current scope is bound to electric arc fixed part 150 by ending the 324a of wall portion to the confined while of the driving of depths.Therefore, the electric arc I of the Weak current scope electric arc that is stranded in extinguishing arc member 120 ends the 324a of wall portion periphery, the time of contact of guaranteeing this electric arc I and extinguishing arc member 120.Promote the generation of extinguishing arc decomposition gas energetically, by this extinguishing arc decomposition gas, the electric arc I of Weak current scope is eliminated.

Further, form opening port 123b, extinguishing arc member path 121a, 121b are opened to the side in the depths of electric arc contact wall 123.Therefore, the extinguishing arc decomposition gas that ends the 324a of wall portion periphery at electric arc is successfully discharged to the side of extinguishing arc member 120 (arc-extinction device 100A) by opening port 123b.When being suppressed at the extinguishing arc decomposition gas delay of electric arc contact wall 123 peripheries, fresh extinguishing arc decomposition gas is supplied in the periphery of electric arc contact wall 123.Therefore, the actuating force of past arc-extinction device 100A inboard is eliminated the electric arc I of little Weak current scope apace.

(2) magnetic sheet 110 is that ferritic stainless steel steel by the carbon of chromium that contains 9.0～16.0 weight % and 0.006～0.020 weight % are formed.Thus, can obtain stable ferrite homogeneous structure, the magnetic of magnetic sheet is improved.Therefore, can improve the blocking performance of the electric arc I of little current range and Weak current scope respectively.Again owing to contain chromium, make the favorable rust preventing effect of magnetic sheet 110.

Generally speaking, magnetic uses iron material more.But, must do plating processing for iron rust.Must consider that again the plating that arc heat causes peels off problem.In the present embodiment, magnetic is to use mother metal itself to have rust-proof effect, can produce the ferritic stainless steel steel of good electric magnetic force again.Therefore, magnetic sheet need not be done and electroplate processing, need not consider that also the plating that arc heat causes peels off problem.

(3) drive link 24 activities are linked to movable electrode 21, and by the driving of this drive link 24, above-mentioned movable electrode 21 constitutes for fixed electrode 15 can engage separation.Constitute the movable electrode that movable electrode 21 is passed through by magnetic sheet path 111a, 111b and extinguishing arc member path 121a, 121b and pass through the α of portion.Then, by on the α of portion, be provided with air-supply member 33, when open circuit, the electric arc I that results between fixed electrode 15 and the movable electrode 21 be pressed into movable electrode by in the portion at the movable electrode of drive link 24.Therefore, follow the open circuit action of drive link 24, air-supply member 33 moves toward the top.By this, produce blast on the direction in by the α of portion electric arc I being pressed into movable electrode.By this blast, replenish for example actuating force of Weak current electric arc in movable electrode passes through the α of portion.Then, the blocking performance is improved.

(4) air-supply member 33 and drive link 24 monolithic moldings.Also is monolithic molding in drive link 24 with alternate barriers 32.Therefore, the number of components is reduced, in body housing 12, save the space again.

(5) the top formation inclined plane 131a of base portion 131.Connect airtight on the 131a of inclined plane below the side edge part of undermost extinguishing arc member 120 (protuberance 127 described later).The front side side edge part of undermost extinguishing arc member 120 (the front side side edge part of protuberance 127 described later) connects airtight on the rear side lateral margin of base portion 131.By this, suppress the extinguishing arc decomposition gas from arc-extinction device 100A internal leakage.Leak into the surface that the outer extinguishing arc decomposition gas of arc-extinction device 100A can stained supporting member 130,113 of the projections of magnetic sheet 110 can not become idiostatic.Can not betide 113 electric arc I of protrusion of surface conducting of supporting member 130, and the situation that can't interdict.Therefore, the blocking performance is improved.

(6) medial surface at base portion 131 forms insulation wall 135.The protuberance 127 overlapping (overlap) of the orlop of this insulation wall 135 and extinguishing arc member 120 is provided with.By this, can suppress the extinguishing arc decomposition gas from arc-extinction device 100A internal leakage.

(7) two supporting members 130,130 are disposed at the front face side (movable electrode is by the open side of the α of portion) of arc-extinction device 100A respectively.Therefore, the elimination of electric arc I can successfully be carried out.

(8) be provided with the engaging teat 140 that usefulness is installed in the side of extinguishing arc member.At the front end of this engaging teat 140, be provided with the anti-locking apparatus of extracting that prevents that this engaging teat 140 from extracting.Particularly, on the fore-and-aft direction of engaging teat 140, the top in the short side that is positioned at opposition side forms sidepiece respectively and pulls out only teat 141.On the above-below direction that closes teat 140, be arranged in the long side surface of opposition side again, the outside junction of superposed long side surface forms top and pulls out only teat 142.Therefore, the extinguishing arc member that engaging teat 140 is embedded in supporting member 130 is with in the supported hole 134, sidepiece pulls out only teat 141 and top and pulls out extinguishing arc member that teat 142 only is sticked in supporting member 130 with supported hole 134 peripheries, can prevent that this engaging teat 140 from extracting from supporting member 130.

(9) magnetic sheet that magnetic sheet 110 and projection 113 inserted supporting members 130 is with behind the supported hole 133, and from the outside of this supporting member 130, the projection 113 of beaing magnetic sheet 110 with chisel by its plastic deformation, prevents that magnetic sheet 110 from extracting from supporting member 130.Therefore, the anti-structure of extracting of the projection 113 of magnetic sheet 110 need not design in addition, and structure can not complicate.

Other embodiment

Other embodiment that the also variable one-tenth of above-mentioned the 3rd embodiment is following.

As shown in figure 40, extend downwards, also can form areola wall 151 by electric arc contact wall 123 with undermost extinguishing arc member 120.So, during open circuit, contact edge 21a, 21b are clamped in 151 on areola wall respectively, obtain the areola effect, can make the blocking performance higher.Each areola wall 151 is that the areola arc-extinction device by the periphery of extinguishing arc member path 121a, the 121b of the extinguishing arc member 120 of being located at undermost extinguishing arc member in the extinguishing arc member 120 is constituted.

And for example shown in Figure 40, in undermost extinguishing arc member 120, the prolongation of interval retaining member 124 belows by following side forms lining wall 152, and by this lining wall 152, the base portion 131 that covers supporting member 130 also can.

In the 3rd embodiment, though being every sides, insulation wall 135 is provided with one, represent with double dot dash line that at the 30th figure every side is provided with two, the insulation wall 135 more than three or three all can.So, can guarantee the creepage distance of extinguishing arc member 120 sides.

In the 3rd embodiment,, omit electric arc contact wall 123 and also can though, extinguishing arc member path 121a, 121b are opened to side by on electric arc contact wall 123, forming opening port 123b.In extinguishing arc member 120, also can in the position of omitting between extinguishing arc member path 121a, 121b.That is, extinguishing arc member path becomes one.Even so, the old extinguishing arc decomposition gas that comprises metal vapors is extracted out to the side of extinguishing arc member path.Then, because the fresh extinguishing arc decomposition gas of sustainable supply can improve the blocking performance.

In the 3rd embodiment, though electric arc contact wall 123 is provided with an opening port 123b, electric arc contacts wall 123 and two, the opening port 123b more than three or three are set also can.So, can make the extinguishing arc decomposition gas to side dissipation.

In the 3rd embodiment, though air-supply member and drive link are monolithic moldings, air-supply member and drive link also can be assemblnig each member.

In the 3rd embodiment,, be located at movable electrode 21 and itself also can though air-supply member 33 is to be arranged on the drive link 24.So, by following the mobile blast that produces of the air-supply member of being located at movable electrode itself, promote movable electrode inducing by portion α inside to electric arc.

In the 3rd embodiment, though magnetic sheet 110 and extinguishing arc member 120 configuration alternately on the moving direction of movable electrode 21, following structure also can.Promptly omit each extinguishing arc member 120, plural pieces magnetic sheet 110 is configuration at certain intervals on the moving direction of movable electrode 21, and constitutes the board-like arc-extinction device of magnetic.Under this situation, magnetic sheet path 111a, the 111b of each magnetic sheet 110 constitute movable electrode by the α of portion.Movable electrode 21 is passing through the α of portion with the direction of each magnetic sheet 110 orthogonal by movable electrode.The material of magnetic sheet 110 selects representative to consist of the magnetic of low-carbon (LC) amount.Particularly, magnetic sheet 110 is formed by the ferritic stainless steel steel with the carbon of the chromium that contains 9.0～16.0 weight % and 0.006～0.020 weight %.So, compare, guarantee the magnetic of magnetic sheet 110 with the magnetic sheet arc-extinction device that magnetic sheet constituted that iron material forms.Owing to contain chromium, can guarantee the anti-corrosion rust-preventing characteristic of magnetic sheet 110 again.Therefore, can improve the blocking performance of the electric arc I that little electric current and Weak current scope are produced respectively.

In the 3rd embodiment, though air-supply member 33 is monolithic moldings with drive link 24, following structure also can.That is, air-supply member 33 also can be each member with drive link 24.Then, form air-supply member 33 by synthetic resin material (containing elastomeric material) with flexibility, follow the driving of movable electrode, the member 33 of should blowing places its base end part (drive link 24 fixation side), and also can to the opposite direction bending of the moving direction of movable electrode 21.So, follow the driving of drive link 24, crooked 33 retention times of member differences and the elastic recovery of must blowing is to original position (reset condition).Therefore, follow the driving of drive link 24 with air-supply member 33 and the situation that is moved upward is compared, the blast that is produced by this air-supply member 33 uprises.Even the electric arc I of little current range and Weak current scope more is pressed towards the inside of arc-extinction device 100A.

In the 3rd embodiment, though arc-extinction device 100A is used in the derailing switch of a bit cutting 11 of twolip type, the derailing switch of a bit cutting that is used in the single-blade type also can.Being used in twolip type or single-blade type 2 cuts derailing switch and also can.Under this situation, dispose arc-extinction device 100A on the inner of mains side sleeve 13 and load-side sleeve 14 respectively, for two anti-system arcing devices, rotary manipulation is implemented to open and close to the fixed electrode in two places by the movable electrode that contact edge constituted of two or a slice zigzag.So, can obtain the effect of present embodiment (1)～(9).

In the 3rd embodiment, though when the inner of mains side sleeve 13 is provided with fixed electrode 15 and arc-extinction device 100A, rotatably support movable electrode 21 on the inner of load-side sleeve 14, but following structure also can, promptly when movable electrode 21 is rotatably supported in the inner of mains side sleeve 13, fixed electrode 15 and arc-extinction device 100A are set on the inner of load-side sleeve 14.So, can obtain the effect of present embodiment (1)～(9).

[table]

The width of expression stria and the relation that little electric current (JIS4605 criterion) could be restrained

Zero: restrain well *: can not restrain

[table two]

The width of expression stria and the relation that little electric current (JIS4605 criterion) could be restrained

Zero: restrain well *: can not restrain

[table three]

Desired rated value of high-voltage alternating load switch device (3.6/7.2kV) and specification

[table four]

(weight %)

	Cr	C	The 10A blocking
				Test portion 1	9.78	0.014	○
Test portion 2	10.39	0.010	○
				Test portion 3	11.90	0.012	○
Test portion 4	14.32	0.009	○
				Test portion 5	16.00	0.006	○
Test portion 6	12.63	0.030	○
				Test portion 7	8.72	0.015	×
Test portion 8	12.20	0.024	×
				Test portion 9	20.01	0.012	×

Claims (23)

1. arc-extinction device, its magnetic sheet are formed by magnetic and have a magnetic sheet path that can allow movable electrode pass through; Its extinguishing arc member by have insulating properties, formed and had an extinguishing arc member path that can allow movable electrode pass through by contact the synthetic resin that produces the extinguishing arc decomposition gas with electric arc; Magnetic sheet and extinguishing arc member are interconnected on the moving direction of movable electrode, in when open circuit, allow the movable electrode that separates from fixed electrode successively by above-mentioned magnetic sheet path and extinguishing arc member path; It is characterized in that:

By above-mentioned each magnetic sheet path and each extinguishing arc member path, constitute the movable electrode that passes through for movable electrode and pass through portion;

Above-mentioned magnetic sheet path in portion, form the width grooving narrow than this magnetic sheet path, constitute by each grooving and when opening a way, induce the electric arc of the electric arc that between fixed electrode and movable electrode, produces to induce portion;

Induce at above-mentioned electric arc on the extended line of portion, be provided with and fixing induce the electric arc of the electric arc that portion induces to restrain portion by this electric arc;

Above-mentioned extinguishing arc member path in portion, form width than the narrow deep slotting of this extinguishing arc member path, allow the electric arc of each magnetic sheet induce portion and the contained portion of electric arc to be exposed to respectively in each deep slotting.

2. arc-extinction device as claimed in claim 1 is characterized in that, with the side edge part of the above-mentioned extinguishing arc member path adjacency of above-mentioned extinguishing arc member on, be provided with guarantee this extinguishing arc member side edge identity distance from creepage distance increase structure.

3. arc-extinction device as claimed in claim 2 is characterized in that, is provided with the configuration space that allows between magnetic sheet and keeps certain interval retaining member on above-mentioned extinguishing arc member; Above-mentioned creepage distance increases structure, be by with the side edge part of described extinguishing arc member path adjacency on, along the formed wall member of this extinguishing arc member path, with the surface and the inner face of extinguishing arc member, and the formed recess of retaining member constitutes at interval.

4. arc-extinction device as claimed in claim 1 or 2 is characterized in that the deep slotting of above-mentioned extinguishing arc member is opened to the inboard of this extinguishing arc member.

5. arc-extinction device as claimed in claim 1 is characterized in that, is provided with protuberance at the side edge part of above-mentioned extinguishing arc member, and the side edge part of the relative magnetic sheet of this protuberance is outstanding.

6. arc-extinction device as claimed in claim 1 is characterized in that, at above-mentioned magnetic sheet path medial margin in opposite directions, makes at least to be parallel to each other corresponding to the position by the movable electrode when this magnetic sheet path, thereby forms this magnetic sheet path.

7. arc-extinction device as claimed in claim 1 is characterized in that the width setup of above-mentioned grooving is in 0.5～2 millimeter scope.

8. arc-extinction device as claimed in claim 1 is characterized in that, the width of above-mentioned grooving greater than 0 below 1.5 millimeters.

9. arc-extinction device as claimed in claim 1 is characterized in that, above-mentioned extinguishing arc member path in portion, form the balancing gate pit that allows the extinguishing arc decomposition gas be detained.

10. arc-extinction device as claimed in claim 9 is characterized in that above-mentioned balancing gate pit is provided with a plurality of.

11. arc-extinction device as claimed in claim 1 is characterized in that, at above-mentioned extinguishing arc member path midway, is provided with to move and suppresses structure, the open side that suppresses the past extinguishing arc member of above-mentioned extinguishing arc decomposition gas moves.

12. arc-extinction device as claimed in claim 1 is characterized in that, when the thickness of above-mentioned magnetic sheet is d1, the thickness of extinguishing arc member is d2, when the configuration space of extinguishing arc member is d3, forms and configuration extinguishing arc member and magnetic sheet and make d1＜d3＜d2.

13. a derailing switch comprises:

A pair of sleeve pipe, on the two side of body housing, every phase place relatively connects support;

One fixed electrode is located at the inner end of a sleeve pipe;

One movable electrode is located at the inner end of another sleeve pipe rotationally, can engage separation with respect to the said fixing electrode;

The described arc-extinction device of claim 1 is located at the above-mentioned inner end that is provided with the sleeve pipe of described fixed electrode.

14. arc-extinction device as claimed in claim 1 is characterized in that:

Above-mentioned extinguishing arc member path in portion, formation ends wall portion with the electric arc of this extinguishing arc member path orthogonal, it is more inside and form abreast with above-mentioned grooving that described deep slotting ends wall portion from this electric arc, this deep slotting in portion and above-mentioned electric arc end the periphery of wall portion, the part of magnetic sheet is exposed to when reaching in the extinguishing arc member path in the above-mentioned deep slotting, forms opening at this extinguishing arc member path.

15., it is characterized in that above-mentioned magnetic is formed by the ferritic stainless steel steel of the carbon of chromium that contains 9.0-16.0 weight % and 0.006-0.020 weight % as claim 1 or 14 described arc-extinction devices.

16., it is characterized in that above-mentioned magnetic sheet and extinguishing arc member supports are between pair of supporting members as claim 1 or 14 described arc-extinction devices, two supporting members are located at the open side of movable electrode path.

17., it is characterized in that above-mentioned supporting member comprises the base portion that is fixed in fixed electrode and supports above-mentioned magnetic sheet and the support portion of extinguishing arc member as claim 16 a described arc-extinction device; Undermost extinguishing arc member connects airtight above above-mentioned base portion.

18. arc-extinction device as claimed in claim 16 is characterized in that, forms single or multiple insulation walls at the inner face of above-mentioned base portion, makes this insulation wall and undermost extinguishing arc member overlapping.

19. arc-extinction device as claimed in claim 16, it is characterized in that, sidepiece at above-mentioned extinguishing arc member, be provided with the engaging teat that usefulness is installed, should engage teat and be inserted in from the inboard by the formed extinguishing arc member of above-mentioned supporting member supported hole, by this, with this extinguishing arc member supports between two supporting members, at the leading section of above-mentioned engaging teat, be provided with and prevent extracting apparatus.

20. as claim 1 or 14 described arc-extinction devices, it is characterized in that, in the undermost extinguishing arc member in each extinguishing arc member, be provided with the finedraw arc-extinction device at the periphery of extinguishing arc member path.

21. arc-extinction device as claimed in claim 16, it is characterized in that, sidepiece at above-mentioned extinguishing arc member is provided with for keeping magnetic sheet to reach the space keeping of configuration space up and down, by the space keeping of the undermost extinguishing arc member in each extinguishing arc member, cover the base portion inner face of above-mentioned supporting member.

22. a derailing switch comprises:

Mains side sleeve pipe and load-side sleeve pipe, each phase place relatively connects support on the two side of body housing;

One fixed electrode is located at the inner end of above-mentioned power supply sleeve pipe; And

One movable electrode is located at the inner end of above-mentioned load sleeve rotationally, can engage separation with respect to the said fixing electrode;

It is characterized in that, also comprise,

Arc-extinction device as claimed in claim 14 is located at the inner end of above-mentioned mains side sleeve pipe;

Drive link, action is linked to above-mentioned movable electrode, and by the driving of this drive link, above-mentioned movable electrode engages with respect to fixed electrode and separates;

Movable electrode is made of above-mentioned each magnetic path and each extinguishing arc member path by portion, and movable electrode is passed through;

Air-supply member, its close movable electrode that is arranged on above-mentioned drive link by portion a side or movable electrode originally on one's body, when opening a way, be pressed into above-mentioned movable electrode and pass through in the portion resulting from electric arc between movable electrode and the fixed electrode.

23. derailing switch as claimed in claim 22 is characterized in that, above-mentioned air-supply member and drive link are monolithic moldings.

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