CN102187537B - Gas-insulated switching device - Google Patents
Gas-insulated switching device Download PDFInfo
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- CN102187537B CN102187537B CN2009801407277A CN200980140727A CN102187537B CN 102187537 B CN102187537 B CN 102187537B CN 2009801407277 A CN2009801407277 A CN 2009801407277A CN 200980140727 A CN200980140727 A CN 200980140727A CN 102187537 B CN102187537 B CN 102187537B
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- mentioned
- insulating bar
- contact
- movable part
- rotating shaft
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/42—Driving mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
- H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H2033/888—Deflection of hot gasses and arcing products
Landscapes
- Gas-Insulated Switchgears (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Displays For Variable Information Using Movable Means (AREA)
Abstract
Disclosed is a compact gas-insulated switching device with a reduced number of components. A large-diameter part (16) is formed in the central part in the axial direction of a rotary shaft (15) which is driven and rotated by an operating device. An insulated operating rod (14) the other end of which is moved in an arc by the rotation of the rotary shaft (15) is formed by cast molding and encases and is formed integrally with the large-diameter part (16) of the rotary shaft (15) in a filler packed with resin. The contact connection part of the insulated operating rod (14) and a movable element (13) is formed for example on an elliptically shaped contact face (21) to contact at almost one point on the central axial line of the movable element (13) during the switching operation.
Description
Technical field
The present invention relates to adopt centered by rotating shaft and the insulating bar of rotation the gas insulation opening and closing arrangement that carries out the switching of movable part.
Background technology
Gas insulation opening and closing arrangement comprises adopting and passes through operator, carry out the shutter of the movable part of opening and closing operations, for example, if follow the on-off action of the movable contact spare in this shutter, have at high-voltage side and produce metallic foreign body, the significantly reduced danger of the withstand voltage properties of shutter.
Thus, in shutter in the past, as foreign matter, occur to suppress good type, for example, record in the TOHKEMY No. 2002-245909 (patent documentation 1), people propose to have in the side of contacting to earth, adopt metal-made bar or gear, it is rotatablely moved and is transformed to rectilinear motion, afterwards, via insulating bar, drive the structure of movable part; Or, for example, as record in TOHKEMY No. 2008-176942 (patent documentation 2) and the flat 8-298040 of TOHKEMY (patent documentation 3), people propose to have employing to be connected with the contact of movable part, and the circular motion of insulating bar is transformed to straight-line structure.
Particularly, the structure of the circular motion of the latter's employing insulating bar has the reduction of easily seeking number of components, the feature reduced of overall dimensions.As the insulating bar of this structure, the general employing be take as the glass fibre of its material so-called fiber-reinforced plastic (FRP) as main body, and mechanical strength is high, and cost is low.
But, if FRP during fabrication, is blended in the resin that hollow fibre adopts, because the insulation endurance of insulating bar significantly reduces; Because of decomposition gas, invade glass fibre, follow like this passing of time and degradation, so its insulation endurance reduces, therefore by the realization of hollow fibre FRP, the raising of coating technology, solve problem.
But, in gas insulation opening and closing arrangement in the past, in the occasion of the structure of the circular motion of adopting above-mentioned insulating bar, due to the insulating bar in the FRP system and high-field electrode or contact to earth between electrode, produce minim gap, therefore electric field is concentrated, easily form the weakness of insulation.People consider, in order to improve this situation, general, by electric field relaxes with radome cover minim gap section around, still, this electric field mitigation has hindered the miniaturization of shutter integral body with radome.
Summary of the invention
The object of the present invention is to provide a kind of gas insulation opening and closing arrangement, its overall dimensions is little, can reduce number of components.
To achieve these goals, the present invention relates to a kind of gas insulation opening and closing arrangement, wherein, in the inside of the airtight container that is sealed with insulating properties gas, have the rotating shaft of roofbolt shape, it is driving by operator, when keeping airtight in above-mentioned airtight container, be rotated; Insulating bar, wherein, distolateral being fixed on above-mentioned rotating shaft, and, by the rotation of rotating shaft, make another distolateral arcuate movement of carrying out; Movable part, it is distolateral that it is connected in another of above-mentioned insulating bar, drive vertically, open and close, it is characterized in that the axial pars intermedia at above-mentioned rotating shaft, be integrally formed into major diameter section, above-mentioned insulating bar is side at one end, by filling Packed resin, form one-body moldedly, imbed the major diameter section of above-mentioned rotating shaft.
Preferably relate to following gas insulation opening and closing arrangement, it is characterized in that above-mentioned insulating bar forms in the following manner, this mode is: distolateral at another, form contact-making surface, above-mentioned contact-making surface is connected with above-mentioned movable part contact, and basic by some contacts on the central axis of the above-mentioned movable part of above-mentioned contact-making surface when on-off action.
Preferably relate to following gas insulation opening and closing arrangement, the major diameter section that it is characterized in that the axial pars intermedia of above-mentioned rotating shaft be along insulating bar axially be major diameter, or broad ways is the elliptical shape of minor diameter.
Best, the material that it is characterized in that above-mentioned resin adopts any one in epoxy resin or phenolic resin.
Best, the filler that it is characterized in that being filled in above-mentioned resin adopts aluminium oxide, any one in silicon dioxide.
The invention effect
According to gas insulation opening and closing arrangement of the present invention, not only can improve the abrasion performance that is filled in the filler in resin, and can be by strengthening the raising of effect, the reduction of residual stress, improve significantly mechanical intensity, compare with the insulating bar of the FRP system in past, the raising of the endurance of can seeking to insulate, can be when guaranteeing insulating reliability, seek gas insulation opening and closing arrangement overall dimensions reduce the reduction with number of components.
In this regard, if distolateral at insulating bar, by filling Packed resin, the cross sectional shape of major diameter section of axial pars intermedia that carries out the rotating shaft of integral injection molding is ellipticity, can further improve the insulation endurance of insulating bar.
In addition, if as insulating bar being carried out to the material of injection molding resin, adopt epoxy resin or phenolic resin, even in the situation that the parts that omit for the FRP system in past are essential coating operations, still can obtain resistance to water, the insulating bar that the decomposition gas of anti-SF6 is good.Also have, if the filler be filled in injection molding resin adopts aluminium oxide, any one in silicon dioxide, can improve the abrasion performance of insulating bar, mechanical strength significantly.
Also have, in gas insulation opening and closing arrangement of the present invention, when insulating bar rotated in the scope of predetermined angular, contact position in contact-making surface and movable part changed, and still, both contact points are on the basic central axis at movable part at ordinary times.So, making the insulating bar rotation, while along closed circuit direction, driving movable part, movable part smoothly moves on the axle line therein point-blank.
In insulating bar and contact-making surface movable part are the occasion of circle shape, if follow the rotation of insulating bar, with the contact of movable part and the central axis of movable part, break away from, from insulating bar, transmission of drive force, produce the composition of the direction perpendicular with the central axis of movable part, on the whole, produce the central axis of relative movable part, the power acted on obliquely, frictional resistance increases, and from sliding part, produces metallic foreign body etc.But, by being above-mentioned contact shape, the activity frictional force acted on the insulating bar formed by insulant and the movable part that formed by metal material significantly reduces, and movable part can move on the axle line smoothly therein, can suppress the generation of the metallic foreign body of this part.
The accompanying drawing explanation
Fig. 1 is the cutaway view of the closed circuit state of the gas insulation opening and closing arrangement of expression one embodiment of the present of invention;
Fig. 2 is the cutaway view of the open-circuit condition of gas insulation opening and closing arrangement shown in Figure 1;
Fig. 3 is the perspective view of the main section of expression gas insulation opening and closing arrangement shown in Figure 1;
Fig. 4 is the performance plot of the relation of the alumina filled amount that means relative resin and abrasion loss;
Fig. 5 is the performance plot of the relation of the alumina filled amount that means relative resin and intensity;
Fig. 6 is the alumina filled amount of the relative resin of expression and the performance plot of coefficient of linear expansion;
Fig. 7 is the enlarged drawing of size relationship of the major part of gas insulation opening and closing arrangement shown in Figure 1;
Fig. 8 rotates the performance plot of amount of movement change curve of the contact position of variation relatively for meaning insulating bar;
Fig. 9 is for meaning in a schematic way the enlarged drawing of the main section of gas insulation opening and closing arrangement shown in Figure 1;
Figure 10 means the front view of the main section of gas insulation opening and closing arrangement in the past in a schematic way;
Figure 11 is the enlarged drawing of the main section of expression gas insulation opening and closing arrangement shown in Figure 1;
Figure 12 is for meaning the front view of the main section of gas insulation opening and closing arrangement in the past in the amplification mode;
Figure 13 is for meaning the vertical view of the main section of gas insulation opening and closing arrangement shown in Figure 1 in the amplification mode;
Figure 14 is for meaning the cutaway view of the main section of gas insulation opening and closing arrangement shown in Figure 1 in the amplification mode;
Figure 15 is for meaning the vertical view of main section of the gas insulation opening and closing arrangement of another embodiment of the present invention in the amplification mode;
Figure 16 is the cutaway view of the main section of gas insulation opening and closing arrangement shown in Figure 15;
Figure 17 is for meaning the vertical view of main section of the gas insulation opening and closing arrangement of another embodiment of the present invention in the amplification mode;
Figure 18 is the cutaway view of the main section of gas insulation opening and closing arrangement shown in Figure 17.
Embodiment
The most preferred embodiment carried out an invention
(embodiment 1)
Below with reference to the accompanying drawings, form of implementation of the present invention is described.
Fig. 1 is the cutaway view of the circuit breaker as gas insulation opening and closing arrangement of an expression form of implementation of the present invention;
At the insulation media that are sealed with the nitrogen of pressurized state, dry air, SF6 gas etc., realize the inside of the closed container 1 contact to earth, by insulation gap spare 4,5, realize the state of electric insulation, supporting high- voltage conductor 2,3 with airtight container 1.
On the center conductor 6 of insulation gap spare 4, fixation side contact 7 is installed, at the peripheral part of fixation side contact 7, electric field is set and relaxes with radome 8.In addition, on the center conductor 9 of insulation gap spare 5, via active side tubular conductor 10, active side contact 11 is installed, at the peripheral part of this active side contact 11, electric field is set and relaxes with radome 12.
In mode to be opened/closed, be connected across movable part 13 between fixation side contact 7 and active side contact 11 according to the mode of carrying out on-off action on axle line therein, contact and be connected in the distolateral of insulating bar 14, that is, and free end side.Distolateral at another of this insulating bar 14, be connected to when keeping airtight, export to the rotating shaft 15 outside closed container 1, unshowned operator in connection layout on this rotating shaft 15.
The syndeton that contacts about movable part 13 and insulating bar 14, to specifically describe in the back, but, on the two sides of the free end side of insulating bar 14, has respectively the curved surface that the part contacted with movable part 13 is set, on the other hand, with the part in movable part 13 that this two curved surface contacts, be plane, both pass through some contacts substantially.
Passing through independent curved-surface structure, from insulating bar 14, when movable part 13 is driven into to illustrated left closed circuit, in addition from insulating bar 14, when movable part 13 is driven into to the illustrated right-hand open circuit, contact point between movable part 13 and insulating bar 14, at ordinary times, remains on the approximate centre axis of movable part 13.
If now, by not shown operator, make along clockwise direction rotating shaft 15 rotations, be integral the free end side of the insulating bar 14 formed with this rotating shaft 15 centered by rotating shaft 15, be rotated in a clockwise direction, the movable part 13 that makes to contact connection drives along right-hand direction that opens circuit on the axle line therein.
Soon, the front of movable part 13 and fixation side contact 7 leave, and move to electric field and relax the inside with radome 12, are in off state shown in Figure 2.On the other hand, from the off state of Fig. 2, by not shown operator, make in the counterclockwise direction rotating shaft 15 rotations, with the free end side that is integral the insulating bar 14 formed with this rotating shaft 15 centered by rotating shaft 15, move in the counterclockwise direction.The movable part 13 that insulating bar 14 makes to contact connection is therein on the axle line, drives along the closed circuit direction of left, and thus, the front of movable part 13 contacts with fixation side contact 7, is in closed circuit state shown in Figure 1.
Fig. 3 is for meaning the perspective view of the connecting portion of insulating bar 14 and rotating shaft 15 in the amplification mode.
Usually, the type that insulating bar 14 adopts FRP to make, but, here, for the axial both ends of the surface 16a that comprises the rotating shaft 15 in major diameter section 16,16b is in interior part, forms integral injection molding by the resin of filling in specifically described epoxy resin in the back as the aluminium oxide of filler, makes.Thus, the contraction during by hardening of resin, the gap between the two of eliminating the major diameter section 16 of insulating bar 14 and rotating shaft 15, prevent from producing the situation of minim gap between resin and rotating shaft 15 and major diameter section 16.
Fig. 4 is illustrated in epoxy resin the performance plot of filling as the relation of the loading of the occasion of the aluminium oxide of filler or silicon dioxide and abrasion resistance.As what according to Fig. 4, know, be filled with the abrasion curve 17A shown in the solid line of aluminium oxide and be filled with the increase that the abrasion curve 17A shown in the dotted line of silicon dioxide all presents the loading of following aluminium dioxide or silicon dioxide, the effect that the aluminium dioxide that rigidity is high or silicon dioxide suppress epoxy resin consumption presents significantly.In addition, as the usage range of the loading of the aluminium oxide of these fillers or silicon dioxide in the scope of 45～75Wt%.
In addition, Fig. 5 is the performance plot of filling in epoxy resin as the relation of the loading of the occasion of the aluminium oxide of filler or silicon dioxide and intensity.As what according to Fig. 5, know, static strength curve 18A shown in fine line and heavy line and endurance failure diagram 19A show, if the loading of aluminium oxide is more than a certain amount of, because the high alumina particle of rigidity is shared the stress of resin inside, suppress the small enhancing effect of peeling off, therefore compare with the occasion of resin only, static strength and fatigue strength improve.Be equally in epoxy resin to fill the occasion of silicon dioxide, as shown in fine line and heavy line, static strength curve 18B and endurance failure diagram 19B are identical characteristic.
Also have, Fig. 6 be in epoxy resin filling as the performance plot of the relation of the loading of the occasion of the aluminium oxide of filler or silicon dioxide and coefficient of linear expansion.Solid line in Fig. 6 and the dotted line aluminium oxide shown in respectively or line expansion curve 20A and the 20B of silicon dioxide all present following situation, if increase the alumina filled amount in epoxy resin, coefficient of linear expansion diminishes, the coefficient of linear expansion (1.3 * 10 of iron
-5/ ℃), the coefficient of linear expansion (1.7 * 10 of copper
-5/ ℃), the coefficient of linear expansion (2.5 * 10 of aluminium
-5/ ℃) difference diminish.
For example, in the occasion that adopts epoxy resin, if the loading of aluminium oxide is 50Wt%, its coefficient of linear expansion can be identical with aluminium.The aluminium oxide or the silicon dioxide that are filled in the filler in epoxy resin can be considered the aluminium will adopted, copper, the coefficient of linear expansion in iron when combination and using.
So, if as shown in Figure 3, when the making of insulating bar 14, in epoxy resin, fill aluminium oxide or the silicon dioxide as filler, be integral the metal rotating shaft 15 that is injected into sections, copper, aluminium etc., can make the corresponding coefficient of the coefficient of linear expansion of this resin near rotating shaft, can reduce residual stress.
Like this, insulating bar 14 and rotating shaft 15 are carried out to the occasion of integral injection molding, not only the abrasion performance of filler can improve, and by strengthening the raising of effect, the minimizing of residual stress, can improve mechanical intensity significantly.In addition, in the situation that do not damage mechanical reliability, can seek the reducing of thickness of insulating bar 14.In addition, also can expect the anti-raising of hitting voltage performance of resin, can compare with the occasion that does not have Packed resin, shorten the length of insulating bar 14.
In addition, as resin material, be not limited to epoxy resin, the resistance to water of employing phenolic resin etc., the resin that anti-decomposition gas is high, filler are not limited to aluminium oxide, even as mentioned above, adopt silicon dioxide, still can expect essentially identical effect.
As above, circuit breaker in gas insulation opening and closing arrangement, in addition as in the grounding opening-closing device of identical scheme, circuit breaker, as on the movable part 13 carrying out on-off action, transmitting the insulating bar 14 from the opening and closing operations power of operator side, form and adopt the filler potting resin, with rotating shaft 15, be integral injection molding structure, thus, can compare with the insulating bar of the FRP system in past, the raising of endurance of can seeking to insulate, can be when guaranteeing insulating reliability, the overall dimensions of seeking the insulated switchgear device reduces the minimizing with number of components.
In addition, if insulating bar 14 is carried out to the material of injection molding resin, adopt epoxy resin or phenolic resin, even in the situation that omit in the past for FRP, manufacture necessary coating operation, still can obtain resistance to water, the insulating bar 14 that the decomposition gas of anti-SF6 is good.
Below the syndeton of the movable part 13 of the free end side of insulating bar 14 described.Fig. 7 is the enlarged drawing of the connecting portion of the movable part 13 of the free end side of expression insulating bar 14.
Insulating bar 14 is for as above, and in free end side, the contact-making surface 21 of the both sides that contact with movable part 13 is at the curved surface contacted with the basic single-point of movable part 13 at ordinary times on the central axis of movable part 13.More particularly, contact-making surface 21 in the free end side of insulating bar 14 and movable part 13 is elliptical curvature, according to the XY plane, is a to oval minor axis, and major diameter is that the ellipse of b carries out the fixed pattern processing, now, forms following mathematical formulae 1.
Now, as shown in Figure 7, shown in the dotted line of contact-making surface 21 in Fig. 7 contacted with movable part 13 in insulating bar 14, also can have the integral body of elliptical shape, in addition, shown in also can the solid line in Fig. 7, in fact, residual have a part contacted with movable part 13, and the upper section beyond other also can cut away.
(mathematical formulae 1)
b
2x
2+a
2y
2＝a
2b
2
If insulating bar 14 centered by rotating shaft 15 and the rotation scope, for example, relative vertical line, the left and right angle θ the scope inward turning then carry out on-off action, under the condition of-45 °<θ<45 °, as shown in mathematical formulae 2, with circular motion, compare, can be according to the equivalent mode of a θ/b rotation, calculating.Considering the occasion of this situation, when the radius of turn as insulating bar 14 was R, radius of turn R was greater than minor axis a fully, major diameter b, and the occasion in θ<20 °, approx,
Set up.
(mathematical formulae 2)
b
2x
2+a
2y
2+(b
2-a
2)xy×sin2θ＝a
2b
2
If adopt it, for example, the occasion of the radius of turn R=300mm of insulating bar 14, if a=25mm, b=50mm, centered by rotating shaft 15, make the free end side rotation of insulating bar 14, the position of the contact-making surface 21 contacted with movable part 13 is followed this rotation and is changed, but, the contact 26 that in fact both contact is being positioned on the central axis of movable part 13 at ordinary times substantially, and this central axis, can be suppressed at the movement of contact shown in Figure 9 26 below 1mm relatively.
If the consideration actual range, in the time of in the scope shown in mathematical formulae 3, the central axis of relative movable part 13, the amount of movement of contact 26, below 3mm, can remain in the scope of realization.
(mathematical formulae 3)
Here, for relatively, Fig. 8 mean insulating bar 14 in the amount of movement change curve of contact 26 of the occasion formed by circle with the contact-making surface 21 of movable part 13, the amount of movement change curve of the contact 26 of the occasion formed by ellipse with this contact-making surface 21.
In the former occasion, amount of movement can be used as R (1-cos θ) and calculates, radius of turn R=300mm, rotation angle θ=20 °, the radius of a circle r=25mm of contact-making surface 21, radius r=50mm, the movement of the corresponding contact 26 during radius r=75mm resembles curve 22, curve 23, curve 24 is such, follows the rotation of insulating bar 14 and changes.
Relative this situation, as above, contact-making surface 21 in insulating bar 14 and movable part 13 is the occasion of elliptical curvature, can further suppress the amount of movement of contact 26 as by shown in amount of movement change curve 25, and it is reduced.
As above, contact-making surface 21 is set in the occasion in the scope shown in mathematical formulae 3, the amount of movement of the contact 26 in fact contacted with movable part 13 is as shown in Figure 9, the central axis of relative movable part 13, below 3mm, on the central axis by movable part 13, a basic point contacts.
Relatively this situation, be the occasion of the circle of radius r=25mm at contact-making surface 21, as shown in Figure 10, and the carrying out of the contact accompanying rotation in fact contacted with movable part 13, the central axis of disengaging movable part 13, from contact 26a，Xiang contact 26b and the about 18mm of movement.
Below the occasion of above-mentioned insulating bar 14 as shutter described.
As above, insulating bar 14 forms in the following manner, and this mode is: it has the injection moulding of being integral in the rotating shaft 15 of an end, centered by this rotating shaft 15, the other end that forms free end side is circular-arc rotation, and other end contact is connected in the end face of movable part 13.
As the Figure 13 of the vertical view as this part and shown in Figure 14 as the enlarged drawing of this part, at the connection side end of movable part 13, form the through hole 27 of the free end side at the top of inserting insulating bar 14.By the shape of this through hole 27, form a pair of end face 28a perpendicular with the central axis of movable part 13,28b.In addition, contact a pair of end face 28a, the insulating bar 14 of the part of 28b, respectively at its left and right sides, forms above-mentioned elliptoid contact-making surface 21.
Namely, the end face 28a of the anticlockwise rotary push movable part 13 of insulating bar 14, as closed circuit action, transmit, in addition, the end face 28b of the clockwise rotary push movable part 13 of insulating bar 14, transmit as closed circuit action, is being contacted with corresponding end face 28a, on the insulating bar 14 of the part of 28b, form above-mentioned elliptoid contact-making surface 21.
Owing to forming such contact syndeton, therefore when insulating bar 14 rotated in the scope of predetermined angular, the contact position that contacts the contact-making surface 21 of this movable part 13 changed, still, both contacts 26 are being positioned on the basic central axis of movable part 13 at ordinary times.
So, as shown in Figure 11, making insulating bar 14 rotations along the direction of arrow, while along closed circuit direction, driving movable part 13, movable part 13 moves point-blank on this central axis.On the other hand, at the Figure 12 as in order relatively providing, with the contact-making surface 21 of movable part 13 occasion for the circle shape, to follow the rotation of insulating bar 14, to break away from the central axis of movable parts 13 with the contact 26 of movable part 13.So, from insulating bar 14, pass to the actuating force generation of movable part 13 and the central axis of movable part 13, by the composition of the right angle orientation shown in arrow, as a whole, as shown in arrow, effect has the central axis of relative movable part 13 and the power of effect obliquely.
As the comparison according to these aspects, know, in contact syndeton shown in Figure 12, force of sliding friction on the movable part 13 that acts on the insulating bar 14 that formed by insulant and formed by metal material becomes large, in addition, composition with direction perpendicular with the central axis of movable part 13, when the closed circuit action of contact 13, effect has excessive bias force.
In such occasion, form and produce movable part 13 and active side contact 11, the friction of the metal in fixation side contact 7, by this part, produce the reason of metallic foreign body.In addition, large if such bias force becomes, have and not only produce metallic foreign body, and produce active side contact 11, biting between fixation side contact 7 and movable part 13, bending, produce this situation, until the danger of shutter akinesia.
Relative this situation, as above, in contact structures shown in Figure 11, the contact 26 of movable part 13 and insulating bar 14 is at ordinary times, from the central axis of movable part 13, change hardly, thus, act on the insulating bar 14 that formed by insulant and the movable part 13 that formed by metal material on activity frictional force can reduce significantly, movable part 13 moves smoothly on this central axis, can suppress the metallic foreign body generation of this part relatively.
Gas insulation opening and closing arrangement is different from other electric device, at high-voltage conductor, is arranged at the inside of inner airtight container 1, has metallic foreign body, now, has the danger that withstand voltage properties reduces significantly, for this reason, according to the mode of pick-up metal foreign matter not, the management of exactissima diligentia ground.
But, have generation is not only sneaked into when assembling metallic foreign body, and when the on-off action of shutter, produce the possibility of metallic foreign body.Particularly, in the shutter part, even the bar moved while being on-off action, beyond the section of mechanism of gear etc., still have because of the slip between other the contact 7,11 that keeps electrically contacting with the movable part 13 moved when the on-off action, produce the possibility of metallic foreign body.
For example, due to the active side contact 11 as shown in Figure 11, even in the action of movable part 13, still keep well electrically contacting, therefore at each contact chip, be arranged in the trumpet type contact of peripheral part of movable part 13, act on contact force by a plurality of springs 27.For this reason, in the occasion with each contact 7,11, best, on the outer peripheral face of movable part 13, act on equably elastic force.
In this regard, due to as above, movable part 13 moves on the axle line therein, therefore fixation side contact 7, the elastic force of active side contact 11 acts on outer peripheral face equably, can suppress the generation of the metallic foreign body of this movable part relatively.
Usually, frictional force for the part that reduces such metal friction, the lubriation material of employing coating lubricating grease etc., the method of moving smoothly, but, having in the occasion that does not apply lubricating grease, frictional force is large, the metallic foreign body of the wire of friction occurs, and the possibility of pulverous metallic foreign body is high.In addition, if even in the situation that be coated with to compose lubricating grease, the degradation of the lubricating grease caused because of the use of following the time, the reason of lubricating grease exhaustion etc., the PERFORMANCE OF GREASES variation, sliding part can't carry out level and smooth action.
But if as above, the contact 26 of insulating bar 14 and movable part 13 is positioned on the central axis of movable part 13 substantially, due to the activity frictional force reduction of this part, therefore can realize, do not adopt the unlubricated smectic state of lubricating grease.
In the occasion that adopts lubricating grease, due to as above, can't avoid following the variation of the performance of the lubricating grease that the passing of time causes, therefore, during the inspection in common lubricating grease use section at device, be lubricated fat and supplement, still, due in gas insulation opening and closing arrangement, shutter is formed at the inside of airtight container 1, therefore can't open simply canister 1, is difficult to supplemental lubrication fat.So, if the sliding part of metal does not have lubricating grease, can not implement over such overhaul yet, can continue chronically the reliability that gas insulation opening and closing arrangement is high.
(embodiment 2)
Figure 15 is the insulating bar 14 of the other embodiment of expression and the vertical view that contacts syndeton and the cutaway view of movable part 13 with Figure 16.
The structure of the contact-making surface 21 of the free end side of insulating bar 14 is identical with above-mentioned occasion.In addition, movable part 13 is different from the conductor part of the realization energising of carrying out left, has right-hand retaining part 29 be connected with insulating bar 14.Retaining part 29 has the through hole 27 illustrated by Figure 13, by screw thread 30, is fixed in conductor part in separable mode.
Due to as according to the relation of the movable part 13 of Figure 11 and active side contact 11, knowing, the retaining part 29 being independent of conductor part, do not have current flowing, therefore its composition material both can be metal material, can be insulating material yet yet.But, by insulating material, form the occasion of retaining part 29, what with insulating bar 14, contact is the retaining part 29 of this insulating material, thus, even in the situation that both frictions, still do not produce metallic foreign body, can further improve the reliability as gas insulation opening and closing arrangement.
In addition, general, the occasion in the slip of same material, can reduce frictional force, thus, be the material identical with above-mentioned insulating bar 14 if form the insulating material of retaining part 29, degree inhibition frictional force that can be further low.For example, insulating bar 14 is by the occasion of putting into Packed epoxy resin and making, and retaining part 29 also can be made by putting into Packed epoxy resin.
In addition, in Figure 15 and another embodiment shown in Figure 16, also can make the integral body of retaining part 29 not be same material, only in the part contacted with insulating bar 14, paste the insulating material identical with insulating bar 14.Equally in this occasion, due to the sliding part that forms this insulating material, thus can greatly reduce frictional force, even can obtain in the situation that do not apply the lubriation material of lubricating grease etc., the contact connecting portion still slided smoothly.
(embodiment 3)
Figure 17 goes back the insulating bar 14 of an embodiment and the vertical view that contacts syndeton and the cutaway view of movable part 13 with Figure 18 for expression.
This example is and Figure 15 and the identical syndeton that contacts shown in Figure 16, in the contact portion of retaining part 29 and the insulating bar 14 of movable part 13, the film 31a of solid lubricant is set, 31b.This solid lubricant can adopt fluororesin of polytetrafluoroethylene (PTFE) etc. etc.
The integral body of retaining part 29 also can be solid lubricant, but owing to being difficult to guarantee mechanical strength, therefore, as illustrated, only in the contact site office, film 31a is set, the 31b this point is the most practical.Owing to can passing through the film 31a of this solid lubricant, 31b, reduce friction greatly, therefore reduce widely the generation of the foreign matter of metallic foreign body etc.
On industry, utilize possibility
Gas insulation opening and closing arrangement of the present invention is not limited to circuit breaker shown in Figure 1, also applicable to other the shutter of structure.
Claims (5)
1. a gas insulation opening and closing arrangement, wherein, in the inside of the airtight container that is sealed with insulating properties gas, have the rotating shaft of roofbolt shape, and it is driving by operator, when keeping airtight in above-mentioned airtight container, is rotated; Insulating bar, wherein, distolateral being fixed on above-mentioned rotating shaft, and by the rotation of rotating shaft, make another distolaterally carry out the arcuation motion; Movable part, it is distolateral that it is connected in another of above-mentioned insulating bar, drive vertically, open and close, it is characterized in that the axial pars intermedia at above-mentioned rotating shaft, be integrally formed into major diameter section, above-mentioned insulating bar is side at one end, by filling Packed resin, form one-body moldedly, imbed the major diameter section of above-mentioned rotating shaft.
2. gas insulation opening and closing arrangement according to claim 1, wherein, above-mentioned insulating bar forms in the following manner, this mode is: distolateral at another, form contact-making surface, above-mentioned contact-making surface is connected with the contact of above-mentioned movable part, and substantially passes through some contacts on the central axis of the above-mentioned movable part of above-mentioned contact-making surface in when on-off action.
3. gas insulation opening and closing arrangement according to claim 1 and 2, wherein, the major diameter section of the axial pars intermedia of above-mentioned rotating shaft be along insulating bar axially be major diameter, or broad ways is the elliptical shape of minor diameter.
4. gas insulation opening and closing arrangement according to claim 1 and 2, wherein, the material of above-mentioned resin adopts any one in epoxy resin or phenolic resin.
5. gas insulation opening and closing arrangement according to claim 4, wherein, be filled in the filler employing aluminium oxide in above-mentioned resin, any one in silicon dioxide.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-300619 | 2008-11-26 | ||
| JP2008300619 | 2008-11-26 | ||
| PCT/JP2009/069676 WO2010061785A1 (en) | 2008-11-26 | 2009-11-16 | Gas-insulated switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102187537A CN102187537A (en) | 2011-09-14 |
| CN102187537B true CN102187537B (en) | 2013-11-27 |
Family
ID=42225661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801407277A Active CN102187537B (en) | 2008-11-26 | 2009-11-16 | Gas-insulated switching device |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2360798B1 (en) |
| JP (1) | JP5135442B2 (en) |
| CN (1) | CN102187537B (en) |
| HK (1) | HK1158384A1 (en) |
| WO (1) | WO2010061785A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK3252793T3 (en) * | 2016-06-03 | 2021-04-12 | Abb Schweiz Ag | SWITCH DEVICE WITH DOUBLE CONDUCTIVE HOUSING |
| JP2023032081A (en) * | 2021-08-26 | 2023-03-09 | 株式会社日立産機システム | vacuum circuit breaker |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1901124A (en) * | 2005-07-21 | 2007-01-24 | 日本Ae帕瓦株式会社 | Gas insulation switch |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48103862U (en) * | 1972-03-08 | 1973-12-04 | ||
| JPH01161633A (en) * | 1987-12-18 | 1989-06-26 | Fuji Electric Co Ltd | Operation position detecting device for high-voltage switch |
| JPH04359821A (en) * | 1991-06-04 | 1992-12-14 | Mitsubishi Electric Corp | Operation link system of switchgear |
| JPH05114337A (en) * | 1991-10-23 | 1993-05-07 | Fuji Electric Co Ltd | Switch |
| JPH0684431A (en) * | 1992-09-03 | 1994-03-25 | Fuji Electric Co Ltd | Linear 3-position disconnector |
| JP3294464B2 (en) | 1995-04-26 | 2002-06-24 | 三菱電機株式会社 | Circuit breaker operating device and vacuum circuit breaker |
| JPH0928011A (en) * | 1995-07-13 | 1997-01-28 | Fuji Electric Co Ltd | Gas insulated switchgear disconnector and ground switch |
| JP4218216B2 (en) | 2001-02-22 | 2009-02-04 | 株式会社日立製作所 | Gas circuit breaker |
| DE50303036D1 (en) * | 2003-07-02 | 2006-05-24 | Abb Research Ltd | Power transmission element, method for its production and apparatus for carrying out the method |
| JP4601487B2 (en) * | 2005-05-02 | 2010-12-22 | 三菱電機株式会社 | Gas insulated switchgear |
| JP4852434B2 (en) | 2007-01-16 | 2012-01-11 | 株式会社日本Ａｅパワーシステムズ | Gas insulated switch |
-
2009
- 2009-11-16 CN CN2009801407277A patent/CN102187537B/en active Active
- 2009-11-16 JP JP2010540464A patent/JP5135442B2/en active Active
- 2009-11-16 WO PCT/JP2009/069676 patent/WO2010061785A1/en active Application Filing
- 2009-11-16 EP EP09829033.1A patent/EP2360798B1/en active Active
-
2011
- 2011-11-17 HK HK11112411.3A patent/HK1158384A1/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1901124A (en) * | 2005-07-21 | 2007-01-24 | 日本Ae帕瓦株式会社 | Gas insulation switch |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2010061785A1 (en) | 2012-04-26 |
| EP2360798A4 (en) | 2013-11-20 |
| CN102187537A (en) | 2011-09-14 |
| EP2360798B1 (en) | 2014-08-20 |
| WO2010061785A1 (en) | 2010-06-03 |
| EP2360798A1 (en) | 2011-08-24 |
| HK1158384A1 (en) | 2012-07-13 |
| JP5135442B2 (en) | 2013-02-06 |
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