CN1173378C - Switch device and power drived switch apparatus - Google Patents

Switch device and power drived switch apparatus Download PDF

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Publication number
CN1173378C
CN1173378C CNB001049356A CN00104935A CN1173378C CN 1173378 C CN1173378 C CN 1173378C CN B001049356 A CNB001049356 A CN B001049356A CN 00104935 A CN00104935 A CN 00104935A CN 1173378 C CN1173378 C CN 1173378C
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CN
China
Prior art keywords
switching device
vacuum tank
buffering ring
vacuum
conductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNB001049356A
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Chinese (zh)
Other versions
CN1269591A (en
Inventor
������ɽ����
丸山稔正
佐藤俊文
����һ
宫本圣一
糸谷孝行
小林稔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP09558399A external-priority patent/JP3775939B2/en
Priority claimed from JP30373299A external-priority patent/JP3905266B2/en
Priority claimed from JP35322299A external-priority patent/JP3758435B2/en
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of CN1269591A publication Critical patent/CN1269591A/en
Application granted granted Critical
Publication of CN1173378C publication Critical patent/CN1173378C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H01H2033/6623—Details relating to the encasing or the outside layers of the vacuum switch housings
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H01H2033/6668—Operating arrangements with a plurality of interruptible circuit paths in single vacuum chamber
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/6606—Terminal arrangements
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/12—Means for earthing parts of switch not normally conductively connected to the contacts

Landscapes

  • Gas-Insulated Switchgears (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Push-Button Switches (AREA)
  • Transmission Devices (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Air Bags (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

The switch gear comprises: a switching mechanism including a first fixed contact piece 21a to be electrically connected to a bus, a first movable contact piece 22a to be contacted with and removed from the first fixed contact piece 21a, a second fixed contact piece 31a to be electrically connected to the first movable contact piece 22a and also to be electrically connected to a transmission cable, and a second movable contact piece 32a to be contacted with and removed from the second fixed contact piece 31a and also to be grounded externally; a vacuum container 10 for storing the switching mechanism therein; and, an insulating mold 60 for covering the vacuum container 10, the mold 60 including on the surface thereof a conductive layer 60a for grounding.

Description

Switching device
Technical field
The present invention relates to a kind of switching device, it comprises switching mechanism, be used for a bus side conductor and a load-side conductor be connected to each other and the main circuit switch part and that disconnects each other is used for earthed switch part that a load-side conductor and a ground connection side conductor are connected to each other and disconnect each other such as one, relate to more particularly to guarantee that safety can make the comparatively switching device of compactness again.
Background technology
Be used for the switching device that electric power is assigned to each load device or other electric panel room by the transmission of electricity cable from a bus is comprised the canister of a ground connection.This switching device also comprises in this canister: a main circuit switch device, this device comprises that one is used for being used for load-side conductor by transmission of electricity cable electrical power distribution from the bus side conductor and that bus receives electric energy, outside these two conductors all were exposed to, this device can also with bus bar side and the load-side conductor be connected to each other and disconnection each other; An and grounding opening-closing device that is used for load-side conductor ground connection.
Figure 28 is the end view that Japan Patent discloses a kind of conventional switch device that is disclosed among the flat 7-28488 of No., and Figure 29 is the electrical connection diagram of this conventional switch device.In these accompanying drawings, label 100 expressions one the inside is packaged with such as SF 6And so on the canister of insulating gas.
Canister 100 has two transmission of electricity side sleeve pipes 110,110 on its outer wall, they extend through their corresponding outer walls respectively and communicate with the inside and outside of canister 100, and can be connected with the transmission of electricity cable, also has a bus bar side sleeve pipe 120 (seeing Figure 29), it extends sleeve outer wall and communicates with the inside and outside of canister 100, and can be connected with bus.And, be provided with a vacuum explosion chamber 200 that keeps high vacuum in the inside of canister 100.
Vacuum explosion chamber 200 portion within it has a switch contact 201 (being shown among Figure 29), and it is used for bus bar side and the transmission of electricity cable-side is connected to each other and disconnection each other; And, having and treat the bus bar side branch conductors 121 that is connected with bus bar side being arranged at one first insulation supporter insulator, 122 upper supports on canister 100 inwalls, it is connected in one by bus bar side sleeve pipe 120 and is arranged on outside bus.
The transmission of electricity cable-side of vacuum explosion chamber 200 can be carried out first derailing switch 130 that closed circuit, ground connection and off position switch by one and is connected in a middle conductor 160 that is bearing on the second insulation supporter insulator 161 that is arranged on canister 100 inwalls.Middle conductor 160 is along both direction branch: specifically, branch direction is can carry out the second switch device 140 that closed circuit, ground connection and off position switch by one to be connected in one first load-side conductor 111; Another branch direction is can carry out the 3rd derailing switch 150 that closed circuit, ground connection and off position switch by one to be connected in one second load-side conductor 112.
The first load-side conductor 111 is connected in one by a transmission of electricity side sleeve pipe 110 and is arranged on the first outside transmission of electricity cable, and load-side conductor 112 is connected in one by another conductive side sleeve pipe 110 and is arranged on the second outside transmission of electricity cable.
By the way, first, second and the 3rd derailing switch 130,140 and 150 are configured to respectively and make their drive parts (not shown) separately drive and swing their insulated connecting rod 170,170,170 and metal connecting rods 180,180,180 separately, thereby switch closed circuit, ground connection and off position.Specifically, in first derailing switch 130, at its closed circuit position, the switch contact 201 in the vacuum explosion chamber 200 is connected in middle conductor 160; At earthing position, switch contact 201 is connected in one ground connection is connected in the earthing conductor 131 of canister 100 perisporiums; At off position, switch contact 201 both had been not attached to middle conductor 160 and also had been not attached to earthing conductor 131.
In the second and the 3rd derailing switch 140 and 150, at they closed circuit positions separately, the first and second load-side conductors 111 and 112 are connected to middle conductor 160; At they earthing positions separately, the first and second load-side conductors 111 and 112 are connected to their corresponding earthing conductors 141 and 151; At they off positions separately, the first and second load-side conductors 111 and 112 not only are not attached to middle conductor 160 but also be not attached to earthing conductor 141 and 151.
Above-mentioned mutually corresponding circuit with switching device only is shown in Figure 28.But, in fact, on the depth direction of Figure 28, be provided with three three mutually corresponding same circuits parts with switching device abreast.That is to say that traditional switching device is configured to like this, promptly three-phase circuit partly constitutes a complete circuit, as shown in figure 29.
As mentioned above, in traditional switching device, three identical circuit parts that correspond respectively to three phases of switching device and constitute a complete circuit are arranged in the canister that is packaged with insulating gas and ground connection; Traditional switching device can switch to bus bar side with transmission of electricity cable-side closed circuit position connected to one another, can be connected in earthy earthing position and be connected the off position that does not all carry out with preceding two; When cutting off switching device the inside can produce electric arc, be used for that the switch contact of disconnection and closed circuit is arranged in the vacuum explosion chamber that is formed at vacuum tank inside between bus bar side and transmission of electricity cable.
Yet, in traditional switching device, partly be arranged in the same canister owing to constitute the three-phase circuit of switching device one complete circuit, thereby not only will guarantee an insulating space in case be short-circuited alternate, also will be in the inner vacuum explosion chamber that forms of canister.This becomes complicated with regard to the structure that makes switching device, and has increased the size of switching device, and then the reduction of limit switch Unit Installation space and obstruction switching device production cost.
On the other hand, be not formed at canister inside in the vacuum explosion chamber and canister inside is packaged with under the situation of insulating gas, the internal pressure that has canister produces the problem that electric arc increases because of switching device when cutting off; Especially, using SF 6During as insulating gas, because SF 6Be defined as a kind of gas that needs the control discharging in case global warming, therefore another problem that produces is exactly SF 6Intractable and control.
Summary of the invention
The present invention is intended to overcome the shortcoming that exists in the above-mentioned conventional switch device.
Therefore, a main purpose of the present invention is to provide a kind of switching device, wherein, be used to switch a main circuit with a bus and a load device is connected to each other and the switching mechanism such as a main circuit switch device that disconnects each other and a grounding opening-closing device are arranged on a vacuum tank inside, this vacuum tank is coated with an insulator die plastic, on the surface of this molded item, be provided with one and treat the conductive layer of ground connection, thereby can guarantee safety, prevent earth fault, can reduce the production cost of switching device, improve the Installation Flexibility of switching device and the processing and the control of Convenient switch device.
Second purpose of the present invention is to provide a kind of switching device, and wherein, the electric power receiving element that is interconnected in bus is made of the wire connection terminal such as connector, thereby can improve the Installation Flexibility of switching device.
The 3rd purpose of the present invention is to provide a kind of switching device, and it is by the external switch device ground connection that can switch with a grounding opening-closing device, thereby can make the possibility that produces earth fault in the switching device be reduced to minimum.
The 4th purpose of the present invention is to provide a kind of switching device, wherein, comprises that a vacuum tank by the circuit of two or more phase compositions forms one with a molded item, thereby can improve the Installation Flexibility of switching device.
The 5th purpose of the present invention is to provide a kind of switching device, wherein, one vacuum tank is contained in the ground connection electric-conductor, this electric-conductor is molded as box-shaped by the electric conducting material such as electroconductive resin, ground connection electric-conductor and vacuum tank form one with a molded item, make the ground connection electric-conductor be exposed to the surface of switching device, thus the production of energy Convenient switch device.
The 6th purpose of the present invention is to provide a kind of switching device, and wherein, the electric-conductor such as metal baffle is embedded in the molded item, makes it relative with a load-side conductor, thus the checked operation of energy Convenient switch device, such as detecting its voltage.
The 7th purpose of the present invention is to provide a kind of switching device, wherein, one vacuum tank is coated with padded coaming, and this vacuum tank and this padded coaming form one by a molded item, thereby can prevent that vacuum tank breaks away from because of their different separately linear expansion coefficients each other with molded item.
The 8th purpose of the present invention is to provide a kind of power switchgear, and it can prevent that the coupling part of vacuum tank is subjected to mechanical failure, and can prevent to produce discharge because of the electric field of concentrating with reasonable manner more.
The 9th purpose of the present invention is to provide the power switchgear that a kind of productivity ratio improves, size is more compact.
For achieving the above object, according to first aspect of the present invention, provide a kind of switching device, it comprises:
One switching mechanism, this switching mechanism comprises:
One first fixed contact piece;
One second fixed contact piece;
But one can contact and first moving contacting plate that separates with this first fixed contact piece, but this first moving contacting plate is electrically connected in this second fixed contact piece; And
But one can contact and second moving contacting plate that separates with second fixed contact piece;
One the inside holds vacuum tank this switching mechanism and that made by metal material; And
One is molded and cover the insulator die plastic of this vacuum tank, wherein forms a conductive layer on the outer surface of this insulator die plastic.
According to second aspect of the present invention, provide a kind of switching device described in first aspect of the present invention, but it comprises that further earthing member and that an electric power receiving element, that is electrically connected in this first fixed contact piece is electrically connected in this second moving contacting plate is electrically connected in the distributing electric power spare of this second fixed contact piece.
In the switching device of the present invention aspect first, second, be used between a bus and a load device disconnecting and the switching mechanism such as the main circuit switch device of closed circuit is arranged in the container, this container is coated with an insulator die plastic, on the surface of this molded item, form a conductive layer and be used for ground connection, thereby can not only guarantee safety, can reduce to provide the area of the internal tank of earthing potential again, thus the earth fault of preventing.The inside of container is whole to remain under the higher vacuum, thereby need not to carry out vacuum extinguishing arc place at needs baffle plate is set at the contact periphery, can simplify the structure of this switching device like this, make it more compact, thereby reduce the production cost and the Installation Flexibility of being convenient to improve switching device of switching device.And, owing to do not use such as SF 6And so on gas, thereby can be convenient to the processing and the control of switching device.
According to the 3rd aspect of the present invention, a kind of switching device described in second aspect of the present invention is provided, wherein, this electric power receiving element is one to be interconnected in the terminal part of a conductor.
In the switching device of third aspect of the present invention, because the electric power receiving element is one to be interconnected in the terminal part of a conductor, such as a connection piece, thereby a plurality of switching devices can be arranged side by side in a limited space, and can be connected in a bus at an easy rate.This can further improve the Installation Flexibility of switching device.
According to the 4th aspect of the present invention, provide a kind of as the described switching device of third aspect of the present invention, but it further comprises an external switch device that can switch with second moving contacting plate, wherein earthing member be formed at the insulation of the lip-deep conductive layer of molded item, and by this external switch device ground connection.
In the switching device aspect the 4th of the present invention, provide the area of the internal tank of earthing potential by cancellation, can prevent in internal tank generation earth fault.Therefore, can improve the reliability and the fail safe of this switching device, the structure of simplification and miniaturization switching device, the production cost of reduction switching device, the Installation Flexibility of raising switching device, and the processing of Convenient switch device and control.
According to the 5th aspect of the present invention, provide that a kind of wherein, this container comprises two or more containers as the described switching device of either side of the present invention first in the 4th aspect, these two or more containers are by the synthetic integral body of molded item.
In the switching device aspect the 5th of the present invention, by with molded item with the synthetic integral body of two or more vacuum tanks, switching device can be made comparatively compact, thereby improve the Installation Flexibility of switching device.
According to the 6th aspect of the present invention, provide a kind of as the described switching device of either side of the present invention first in the 5th aspect, it further comprises a ground connection electric-conductor, the conductive layer that is formed on the molded item laminar surface synthesizes an integral body by molded item and this ground connection electric-conductor, makes the ground connection electric-conductor be exposed on the surface that is formed at the conductive layer on the molded item laminar surface.
In the switching device of sixth embodiment of the invention, the shape that will the electric conducting material such as electroconductive resin be molded as cylindrical shape or rectangular box, thereby form a ground connection electric-conductor, one vacuum tank is contained in this ground connection electric-conductor, by molded item they is closed from an integral body and make the ground connection electric-conductor be exposed to the surface of vacuum tank.This can be convenient to when making switching device conductive layer is formed on the molded item surface.
According to the 7th aspect of the present invention, provide a kind of as the described switching device of either side of the present invention first in the 6th aspect, it further comprises electric-conductor to be buried underground, and this buries electric-conductor underground is embedded in the molded item this electric-conductor to be buried underground by molded item and the synthetic integral body of container.
In the switching device aspect the 7th of the present invention, the electric-conductor to be buried underground such as a metal cap is embedded in the molded item and makes it relative with a load-side conductor, thereby can realize a circuit that is equivalent to capacitor.This can conveniently carry out checked operation to the situation of switching device, such as the voltage detecting to switching device.
According to the 8th aspect of the present invention, provide a kind of as the described switching device of either side of the present invention first in the 7th aspect, it further comprises the padded coaming of waiting to be held between container and the molded item.
In the switching device aspect the 8th of the present invention, one vacuum tank is covered with padded coaming, they are by the synthetic integral body of a molded item, this padded coaming is held between vacuum tank and the molded item, can prevent between vacuum tank and the molded item separated from one another because of different linear expansion coefficients like this.
According to the 9th aspect of the present invention, a kind of vacuum insulated switch gear is provided, it comprises the derailing switch of a vacuum tank and the requirement in this vacuum tank inside to be installed, wherein this vacuum tank is made by metal material and is formed by an insulator molding.
According to the of the present invention ten aspect, as the present invention aspect first in described vacuum insulated switch gear, the surface of molded item provides earthing potential through conductive processing.
According to the 11 aspect of the present invention, as the present invention aspect first in described vacuum insulated switch gear, the derailing switch of each phase is contained in this vacuum tank.
According to the 12 aspect of the present invention, in as the described switching device of either side during the present invention is aspect first, this vacuum tank is made of a cylindrical body member and two end pieces of sealing these body member two ends respectively.
According to the 13 aspect of the present invention, in as the described switching device of either side during the present invention is aspect first, this vacuum tank is made of the band round-ended cylinder shape body member of one one distolateral opening and the end pieces of this body member openend of sealing.
According to the 14 aspect of the present invention, in as the described switching device of either side during the present invention is aspect first, this vacuum tank is made of the band round-ended cylinder shape body member of two one distolateral equal openings, and these two body members combine and their openends are separately contacted with each other simultaneously.
According to the 15 aspect of the present invention, in described switching device aspect the present invention second or the 3rd, be resisted against in the end pieces of a body member waiting, form a localization part being contained in wherein for body member against the end.
According to the 16 aspect of the present invention, in described vacuum insulated switch gear aspect the 4th of the present invention, in of the open end portion of two body members that abut against each other, be formed with a localization part that can match with another.
According to the 17 aspect of the present invention, in as the described vacuum insulated switch gear of either side during the present invention first is aspect the 6th, make it not only extend through vacuum tank but also towards the main circuit conductor of its inside and outside extension for an one-tenth to be installed, in the inner edge in a hole that allows main circuit conductor to extend in the above described manner, be formed with an electric field that is used to relax electric field and relax loop section.
According to the 18 aspect of the present invention, as aspect the 7th in the described vacuum insulated switch gear, electric field relaxes loop section and is stretched out by the inner edge in hole and form.
According to nineteen of the present invention aspect, a kind of power switchgear is provided, wherein, the adjacent part of the coupling part between the metal workpieces of the insulating concrete cylinder of vacuum tank and a vacuum tank is coated with the buffering ring of making by conductive rubber, and the part that is coated with buffering ring and vacuum tank outer surface all have the resin insulating barrier from its outer side covers.
According to the 20 aspect of the present invention, a kind of power switchgear is provided, wherein, one end parts of each conductive rubber buffering ring covers the peripheral end of insulating concrete cylinder, the other end of conductive rubber buffering ring partly covers the neighboring of metal vacuum container features, the end angular of the covering insulating concrete cylinder peripheral end of buffering ring covers and is rounded to a radius that is slightly less than this angle thickness, the end outer periphery surface of the covering metal vacuum container features neighboring of buffering ring forms conical surface respectively, the thickness of its jag is almost nil, and the step portion of the interior perimeter surface of buffering ring is chamfered to be a size greater than formed soldering fillet size in the coupling part respectively.
According to the 21 aspect of the present invention, a kind of power switchgear is provided, wherein, one end parts of each conductive rubber buffering ring covers the peripheral end of insulating concrete cylinder, the other end of conductive rubber buffering ring partly covers the neighboring of metal vacuum container features, the end angular of the covering insulating concrete cylinder peripheral end of buffering ring is rounded to a radius that is slightly less than this angle thickness, the end of the covering metal vacuum container features neighboring of buffering ring is formed at respectively in the plane of axially intersecting with insulating concrete cylinder, and the internal side diameter end angular of the covering metal vacuum container features neighboring of the step shape part of the interior perimeter surface of buffering ring and buffering ring is chamfered to be one respectively greater than the size that is formed at the soldering fillet size in the coupling part.
And in this power switchgear, the bonding conductor that the electrode of key element switch is connected in the power switchgear outside is connected in the inside of resin insulating barrier by fixture.
And, use a head to have the bolt of an arch section as fixture.
In addition, provide a voltage grading electrode in the periphery of the bonding conductor in resin insulating barrier, this voltage grading electrode will be located by an insulator that is fixed in bonding conductor.
In addition, in the inside of resin insulating barrier, be provided with a voltage-dividing capacitor, its structure is made and is made one electrode be connected in bonding conductor, and its electrostatic capacitance is greater than between all electrodes and with respect to the floating capacitance between all phases of bonding conductor.
Description of drawings
Fig. 1 is the side sectional view of the switching device of the embodiment of the invention 1.
Fig. 2 is the front view of the switching device of the embodiment of the invention 1, represents that it does as a whole and state when configuration.
Fig. 3 is the electrical connection diagram of the switching device of the embodiment of the invention 1, the part of an expression one phase.
Fig. 4 is the side sectional view of the switching device of the embodiment of the invention 2.
Fig. 5 is the front view of the switching device of the embodiment of the invention 2, represents that it does as a whole and state when configuration.
Fig. 6 is the side sectional view of the switching device of the embodiment of the invention 3.
Fig. 7 is the front view of the switching device of the embodiment of the invention 3, represents that it does as a whole and state when configuration.
Fig. 8 is the side sectional view of the switching device of the embodiment of the invention 4.
Fig. 9 is the side sectional view of an employed ground connection conductive box in the switching device of the embodiment of the invention 4.
Figure 10 is the side sectional view of an employed conductive shield in the switching device of the embodiment of the invention 4.
Figure 11 A is the side sectional view of an employed molded item in the switching device of the embodiment of the invention 4, and this molded item has a conductive shield that is embedded in around the one second fixed conductor bar; Figure 11 B is the circuit diagram of an equivalent circuit of this molded item.
Figure 12 is the front view of structure of the embodiment 5 of vacuum insulated switch gear of the present invention, represents that it does as a whole and state configuration.
Figure 13 is the side sectional view of the structure of embodiment 5.
Figure 14 is the side sectional view of the structure of embodiment 6.
Figure 15 is the side sectional view of the structure of embodiment 7.
Figure 16 is the side sectional view of the structure of embodiment 8.
Figure 17 is the amplification view of major part of the structure of embodiment 9.
Figure 18 is another amplification view of major part of the structure of embodiment 9.
Figure 19 is the another amplification view of major part of the structure of embodiment 9.
Figure 20 is the amplification view of major part of the structure of embodiment 10.
Figure 21 is the amplification view of major part of the structure of embodiment 11.
Figure 22 is another amplification view of major part of the structure of embodiment 11.
Figure 23 is the cutaway view of major part of first embodiment of power switchgear of the present invention.
Figure 24 A and 24B are the cutaway views of the buffering ring that adopted in the power switchgear of the present invention.
Figure 25 is a cutaway view of changing a social system the major part of form of power switchgear shown in Figure 23.
Figure 26 is the cutaway view of major part of second embodiment of power switchgear of the present invention.
Figure 27 is a cutaway view of changing a social system the major part of form of power switchgear shown in Figure 26.
Figure 28 is the side sectional view of a traditional switching device.
Figure 29 is the electrical connection diagram of this conventional switch device.
Embodiment
(embodiment 1)
Describe first embodiment of switching device of the present invention below with reference to accompanying drawings in detail.
Fig. 1 is the side sectional view of the switching device of the embodiment of the invention 1, and Fig. 2 is the front view of this switching device, and the state when representing its actual disposition, Fig. 3 are the electrical connection diagrams corresponding to the part of three of a switching devices phase in mutually of this switching device.This embodiment 1 provides a switching mechanism, as shown in Figure 3, its closed main circuit contact part 20 will be the time from distributing electric power to that bus receives transmission of electricity cable, and when ground connection a closed grounding component 30.
In Fig. 1, label 10 expression one has the vacuum tank (corresponding to a phase of switching device) of H shape side surface, and it is installed on the vertical tube on the upper and lower part at transverse tube two ends respectively by a transverse tube and four; This vacuum tank 10 forms airtight, and the inside of vacuum tank 10 keeps high vacuum.
The transverse tube part 11 of vacuum tank 10 is made by the metal such as SUS.Specifically, a vertical tube that is arranged on the distolateral top of transverse tube part 11 1 of vacuum tank 10 partly forms cylindrical shape, and the metal tube 13 that it forms inverted band round-ended cylinder shape by an insulated tube 12 and of making and form transverse tube part 11 sidepieces by pottery and forms transverse tube part 11 tops constitutes.A vertical tube that is arranged on the distolateral bottom of transverse tube part 11 1 of vacuum tank 10 partly forms cylindrical shape, and the metal tube 15 that it forms inverted band round-ended cylinder shape by an insulated tube 14 and of making and form transverse tube part 11 sidepieces by pottery and forms transverse tube part 11 bottoms constitutes.
Equally, a vertical tube that is arranged on transverse tube part 11 another distolateral tops of vacuum tank 10 partly forms cylindrical shape, and the metal tube 17 that it forms inverted band round-ended cylinder shape by an insulated tube 16 and of making and form transverse tube part 11 sidepieces by pottery and forms transverse tube part 11 tops constitutes.A vertical tube that is arranged on the distolateral bottom of transverse tube part 11 1 of vacuum tank 10 partly forms cylindrical shape, and the metal tube 19 that it forms inverted band round-ended cylinder shape by an insulated tube 18 and of making and form transverse tube part 11 sidepieces by pottery and forms transverse tube part 11 bottoms constitutes.
The lower surface that is positioned at the distolateral bottom of transverse tube part 11 1 of metal tube 15 is fixed with one first fixed conductor bar 21, and it not only extends through vacuum tank 10, but also towards its outside and inner extension; The lower end that is positioned at vacuum tank 10 outsides of this first fixed conductor bar 21 provides a terminal 25 that is interconnected in a bus 51; The upper end that is positioned at vacuum tank 10 inside of this first fixed conductor bar 21 is fixed with the fixed contact therefor 21a of a formation dish type.
Be provided with the first movable contact 22a of a formation dish type above the first fixed contact therefor 21a, it can and separate with first fixed contact therefor 21a contact; The first fixed contact therefor 21a matches with the first movable contact 22a and forms a main circuit point 20.
The first movable contact 22a is fixed in the lower end of one first movable conductor rods 22, this first movable conductor rods not only extends through vacuum tank 10 at the upper surface of the metallic plate 13 that is arranged in the distolateral top of transverse tube part 11 1, but also towards its inside and outside extension; This first movable conductor rods 22 movably is supported on vertical direction by first bellows 23 that is sealingly fastened in the upper surface inside of metal tube 13.Expansion that first bellows 23 is caused by the vertical motion of the first movable conductor rods 22 and contraction can keep vacuum tank 10 airtight.
The upper end that is positioned at vacuum tank 10 outsides of the first movable conductor rods 22 is connected in a main circuit drive division that is used for vertically driving the first movable conductor rods 22.
By the way, the first movable conductor rods 22 is made of the first movable conductor rods top 22d and the ceramic insulating part 22c inner at vacuum tank 10 and that be held between the first movable conductor rods bottom 22b and the first movable conductor rods top 22d that first a movable conductor rods bottom 22b, who is fixed with the first movable contact 22a is interconnected in main circuit drive division 24, and insulating part 22c makes the first movable conductor rods bottom 22b and the first movable conductor rods top 22d insulated from each other.
The lower surface of metal tube 18 of another distolateral bottom that is arranged in the transverse tube part 11 of vacuum tank 10 is fixed with second a fixed conductor bar 31 that extends through vacuum tank 10 outwardly and inwardly; The lower end that is positioned at vacuum tank 10 outsides of this first fixed conductor bar 31 provides one to be interconnected in one and to be used for the terminal 35 of distributing electric power to the transmission of electricity cable 52 of each load device or other electric panel room; The upper end that is positioned at vacuum tank 10 inside of this first fixed conductor bar 31 is fixed with the second geometrical clamp gripping member 31a of a formation dish type.
By the way, on the second fixed conductor bar, 31 tops and the first movable conductor rods bottom 22b and in being provided with a fexible conductor 40 between them, therefore, the second fixed conductor bar 31 and the first movable conductor rods bottom 22b are electrically connected each other.
Be provided with the second movable contact 32a of a formation dish type above the second fixture 31a, it can contact with the second fixed contact therefor 31a and separate; The second fixed contact therefor 31a and the second movable contact 32a match and form a ground connection contact point 30.
The second movable contact 32a is fixed in the lower end of one second movable conductor rods 32, this second movable conductor rods not only extends through vacuum tank 10 at the upper surface of the metallic plate 13 that is arranged in transverse tube part 11 another distolateral tops, but also towards its inside and outside extension; This second movable conductor rods 32 movably is supported on vertical direction by second bellows 33 that is sealingly fastened in the upper surface inside of metal tube 13.Expansion that second bellows 33 is caused by the vertical motion of the second movable conductor rods 32 and contraction can keep vacuum tank 10 airtight.
The second movable conductor rods 32 is connected in an earthing potential in vacuum tank 10 outsides by a terminal 36, and the upper end of the second movable conductor rods 32 is connected in an earthed circuit drive division 34 that is used for vertically driving the second movable conductor rods 32.
Vacuum tank 10 is coated with a molded item 60 of being made by the insulating resin such as epoxy resin, makes the end that lays respectively at transverse tube part 11 and the metal tube 13 and 17 on another distolateral top expose; The surface of the molded item 60 of covering vacuum container 10 is provided with a conductive layer 60a who is for example formed by evaporation metal, thereby the surface of molded item 60 can ground connection.
By the way and since conductive layer 60a also with metal tube 13 and 17 conductings, thereby metal tube 13 and 17 also provides earthing potential.
As shown in Figure 2, be arranged side by side three each switching devices in the horizontal direction, thereby form the corresponding switching device of one and one complete circuit corresponding to an above-mentioned phase.And each main circuit drive division 24,24,24 and each earthed circuit drive division 34,34,34 can be arranged to be connected to each other, like this can be so that form controlling organization between each drive division, such as interlock.
In the above-described embodiments, as the switching mechanism that is contained in the vacuum tank, what illustrate is the structure that main circuit switch device and Grunding switch gear device be arranged in parallel.But this is not restrictive, can also adopt other different structure: for example, only have the main circuit switch device to be contained in the interior structure of vacuum tank; But moving-conductor can along continuous straight runs contact and separated structures.
In the switching device of the embodiment of the invention 1 of so constructing, each vacuum tank is coated with the molded item of being made by insulating resin, conductive layer is arranged on the molded item surface and is used for ground connection, so not only can also simplify and the miniaturization switching device guaranteeing to prevent earth fault in safe.
(embodiment 2)
Fig. 4 is the side sectional view of the switching device of the embodiment of the invention 2, and Fig. 5 is the front view of the whole configuration of this switching device.By the way, the electrical connection diagram of embodiment 2 is identical with Fig. 3.
In this embodiment 2, three vacuum tanks 10,10,10 that correspond respectively to three phases of circuit synthesize integral body by a molded item 60, thereby have shortened the distance H between each phase.By the way, because vacuum tank is insulated from each other by the molded item 60 that is formed by insulating resin respectively, thereby each is difficult to be short-circuited between mutually, and each distance H between mutually and three three circuit parts mutually that correspond respectively to complete circuit are arranged on structure in the single vacuum tank and compare and shortened.
And, as the terminal that is interconnected in bus 51, adopted a conductor connection terminal 26 such as connector, this can be so that will be corresponding to two or more switching devices of two or more circuit so that the mode that they are arranged in the confined space be connected in bus 51.By the way, in this embodiment 2, it is represented with identical label with embodiment 1 corresponding those parts, and omits description of them.
In the switching device of the embodiment of the invention 2 of so constructing, corresponding to three vacuum tanks of three phases of a complete circuit by the synthetic integral body of molded item, conductor connection terminal is as the terminal that is interconnected in bus, this can improve the productivity ratio of switching device, reduce the size of switching device, and increase the Installation Flexibility of switching device.
(embodiment 3)
Fig. 6 is the side sectional view of the switching device of the embodiment of the invention 3, and Fig. 7 is the front view of the whole configuration of this switching device.By the way, the electrical connection diagram of this embodiment 3 and Fig. 3 are basic identical.
In this embodiment 3, the first movable conductor rods 22 between the top of vacuum tank 10 outsides and main circuit drive division 24 and between the top and earthed circuit drive division 34 of the second movable conductor rods 32, be respectively equipped with main circuit drive division insulating part 22e and ground connection drive division insulating part 32b, thereby make the first movable conductor rods 22 and main circuit drive division 24 insulated from each other and make the second movable conductor rods 32 and earthed circuit drive division 34 insulated from each other.
Extending out from the second movable conductor rods 32 and be interconnected on the connecting line of an earthing potential, be provided with a switch 80, it can be with a grounding component 30 open and closes, thereby when grounding component 30 was opened, the second movable conductor rods 32 can disconnect with ground connection.By the way, switch 80 can be installed in the air, also can install in a vacuum or in the insulating gas, especially installs in a vacuum or in the insulating gas time, the size of switch 80 can further reduce at its.
And, be formed with a sunk part 60b who does not establish conductive layer 60a at the upper surface of molded item 60, thereby not only saved the insulated tube 12 that is positioned at the distolateral top of vacuum tank 10 1, also saved the insulated tube 16 that is positioned at vacuum tank 10 another distolateral tops, therefore, not only lay respectively at an end of vacuum tank 10 and the metallic plate 13 and the metal tube 17 on another distolateral top and open, and the current potential of transverse tube part 11, metal tube 13 and the metal tube 17 of vacuum tank 10 is equal to each other with ground insulation.By the way, in this embodiment 3, it is represented with identical label with embodiment 1 corresponding those parts, and omits description of them.
As described above, in embodiments of the invention 3, saved the part that earthing potential can be provided from the inside of vacuum tank 10 when grounding component 30 is opened, thereby earth fault takes place in the inside that can prevent vacuum tank 10.
And because vacuum tank 10 provides an intermediate potential, thereby main circuit drive division insulating part 22e and ground connection drive division insulating part 32b can have respectively and be equal to or less than half withstand voltage properties of rated insulation voltage value, and this can reduce the size of this switching device.
In addition, by apply a voltage with switch 80, can carry out withstand voltage test to cable.
(embodiment 4)
Fig. 8 is the side sectional view of the switching device of the embodiment of the invention 4.By the way, the electrical connection diagram of this embodiment 4 is identical with Fig. 3.
In the switching device of this embodiment 4, be coated with conductie buffer material 91 by the periphery of the metal transverse tube part 11 such as SUS, such as conductive rubber; Lay respectively at the metal uneasiness 13,15,17 of upper and lower at transverse tube part 11 two ends and 19 periphery and be coated with respectively and have padded coaming 92,92,92,92, such as silicone-based rubber.
Will the electric conducting material such as electroconductive resin be molded as and have identical external shape with a molded item 60, thereby provide a ground connection conductive box 90, one vacuum tank 10 is contained in this ground connection conductive box 90, insulating resin is poured into the inside of ground connection conductive box 90, and the above-mentioned member of this switching device synthesizes an integral body by the molded item 60 that is formed by the insulating resin that pours into.Therefore, conductie buffer material 91 and buffer insulation material 92,92,92,92 are held on respectively between vacuum tank 10 and the molded item 60, and ground connection conductive box 90 is exposed to the surface of molded item 60 simultaneously.
Fig. 9 is the side sectional view of ground connection conductive box 90.As shown in Figure 9, ground connection conductive box 90 forms and the identical rectangular box shape of conductive layer that is arranged in embodiment 1 on the molded item 60.
This can not only prevent that vacuum tank 10 is separated from one another because of their different linear expansion coefficients with molded item 60, can also eliminate on molded item 60 surfaces and form necessity of conductive layer 60a, thereby simplify the production process of this switching device.
And, have bonding one metal forming 93b or evaporation metal on the cylindrical shape substrate 93a of a flange portion, thereby produce a conductive shield 93 through conduction processing, this conductive shield 93 is embedded in the one second fixed conductor bar 31 that is arranged in the molded item 60 around, make this conductive shield 93 relative with the second fixed conductor bar 31 across an insulating barrier.One voltage detection terminal is set on the outside of molded item 60, thereby molded item 60 is electrically connected in conductive shield 93.By the way, all members of this embodiment 4 use the label identical with the front to represent, and omit description of them.
Figure 10 is the side sectional view of conductive shield 93.As shown in Figure 10, in this conductive shield 93, metal forming 93b is bonded in the inboard of cylindrical shape substrate 93a, a side relative with the second fixed conductor bar 31 just, thereby makes conductive shield 93 have conductivity.
Figure 11 A is the side sectional view of molded item 60, wherein conductive shield 93 be embedded in the second fixed conductor bar 31 around and allow molded item 60 to detect voltages, Figure 11 B is the circuit diagram of an equivalent circuit corresponding with the voltage detecting circuit of molded item 60.
As shown in Figure 11 A and 11B, because both the second fixed conductor bars 31 that all conduct electricity and conductive shield 93 are with toward each other and have the mode of insulator die plastic 60 to bury underground between them, thereby this structure is equivalent to a capacitor C1, the corresponding electric charge of electric charge that gathers in conductive shield 93 and flow on bus bar side.
Be equivalent to the voltage detecting cable 94 of a capacitor C2 and the circuit of ground connection is connected in a terminal that is connected with conductive shield 93 with treating by one, to detect the electric charge that is gathered, and a light-emitting diode (LED) is listed in voltage detecting cable 94 and is connected with a element that can carry out voltage detecting or a device such as potentiometer, thereby can be qualitatively or detect the current potential of the second fixed conductor bar 31 quantitatively.
In this embodiment 4 of the present invention that so constructs, ground connection conductive box, padded coaming and conductive shield are by the synthetic integral body of molded item, can simplify the production process of switching device like this, prevent that vacuum tank and molded item are separated from one another, and be convenient to carry out the detecting operation such as voltage detecting.
(embodiment 5)
The structure of the vacuum insulated switch gear of the embodiment of the invention 5 is as follows: for example, and the inside that a main circuit switching part that is made of a main circuit switch device fixed electrode, a main circuit switch device movable electrode and an insulating bar, a ground connection switching part that is made of a grounding opening-closing device grounding electrode and a grounding opening-closing device movable electrode and a fexible conductor are contained in each metal vacuum container mutually respectively; The outer surface of this vacuum tank is molded with an insulator, and the molded surface of vacuum tank provides an earthing potential through conductive processing, and vacuum tank is connected in the outside by an insulating sleeve.Below with reference to Figure 12 and 13 this embodiment 5 is described.Figure 12 is the front view of this switching device, represents the state of its actual disposition; Figure 13 is the side sectional view of this switching device.
In Figure 12 and 13, vacuum tank 1011 is one by the molded metallic container of a metalwork.Specifically, in this vacuum tank 1011, a cylindrical body member and two synthetic integral body in end of sealing two open end side of this body member respectively; In these two ends of vacuum tank 1011, have the hole of right quantity, for the device of requirement in the mode that extends through, just not only to extend through vacuum tank but also plug towards the mode of its inside and outside extension.
In an illustrated embodiment, have two holes, just four hole A, B, C and D altogether in the top and bottom of vacuum tank 1011.These holes A, B, C and D soldering have ceramic insulating concrete cylinder 1018,1019,1020 and 1021, make them be inserted in respectively in the corresponding hole.
In Figure 13, a main circuit switch device fixed electrode 1004 and a grounding opening-closing device fixed electrode 1007 are brazed in the middle body of insulating concrete cylinder 1018 (hole A) and 1019 (hole B) respectively, make them be inserted in respectively in the corresponding middle body.Main circuit switch device fixed electrode 1004 is connected in a bus 1013 that is positioned at vacuum tank 1011 outsides, and grounding opening-closing device fixed electrode 1007 is connected in a transmission of electricity cable 1014 that is positioned at vacuum tank 1011 outsides.
Relative position side (upside among Figure 13) at main circuit switch device fixed electrode 1004, one main circuit switch device movable electrode 1005 provides an insulating bar 1015, and a ceramic insulator 1009 is arranged between them, insulating bar 1015 is inserted in the insulating concrete cylinder 20 (hole C) in the mode that can vertically move freely.
Main circuit switch device movable electrode 1005 and grounding opening-closing device fixed electrode 1007 are connected to each other in the mode that can move freely by a fexible conductor 1010 in vacuum tank 1011.And in the relative position side (upside among Figure 13) of grounding opening-closing device fixed electrode 1007, a grounding opening-closing device movable electrode 1008 is inserted in the middle body of insulating concrete cylinder 1021 (hole D) in the mode that can vertically move freely.
Main circuit switch device movable electrode 1005 can vertically move in Figure 13, and constitutes a main circuit switch portion (1004,1005), and they can contact with separating open and close one main circuit with main circuit switch device fixed electrode 1004.Equally, grounding opening-closing device movable electrode 1008 can vertically move in Figure 13, and constitutes an earthed switch portion (1007,1008), and they can contact with grounding opening-closing device fixed electrode 1007 and separate.
The two ends of expansion bellows 1006 are individually fixed in insulating bar 1015, insulating concrete cylinder 1020 (hole C), grounding opening-closing device movable electrode 1008 and the insulating concrete cylinder 1021 (hole D) of main circuit switch device movable electrode 1005; That is to say that bellows 1006 is not only with the inside of airtight mode sealed vacuum container 1011, but also allow main circuit switch device movable electrode 1005 and grounding opening-closing device movable electrode 1008 vertically to move.
In this embodiment 5, as described above, main circuit switch portion (1004,1005) and earthed switch portion (1007,1008) are contained in the single vacuum tank 1011 that is made of metal as one group; (occasion that is made of three-phase at switching device) is provided with three vacuum tanks 1011, and they are molded together by an insulator and a molded item 1012 is provided; The surface of molded item 1012 is through conductive processing, and ground connection.
By the way, employed term " cylindrical shape " not only refers to simple cylindrical shape among the present invention, but also refers to other various drums, comprises square and so on band angular shape or is not limited to the ellipse of section shape.
According to embodiment 5, because main circuit switch portion (1004,1005) and earthed switch portion (1007,1008) be the inside that is contained in vacuum tank 1011, and the connection from vacuum tank 1011 to the outside is to realize by insulating bar 1015, thus this switching device can be according to insulating Design, just can provide the vacuum design of superior electrical insulation property to come body plan; That is to say that this switching device can make comparatively compact.
And, provide molded item 1012 owing to these three vacuum tanks 1011 (in the three-phase occasion) are molded together, and the surface of molded item 1012 is through conductive processing and ground connection, thereby this switching device is easy to handle.
In addition, because vacuum tank 1011 is the canisters that can be easy to be molded as required form, thereby compares with the traditional round drum ladle of being made by pottery, this vacuum tank 1011 can freely be installed.
(embodiment 6)
Embodiments of the invention 6 provide a kind of transformation of the way form of the structure of the metal vacuum container 1011 that is adopted in the foregoing description 5; The remainder of the structure of this embodiment 6 for example waits to be contained in each derailing switch (1004,1005,1007,1008), other each erecting device and the structure of these devices in the vacuum tank 1011, all identical with the foregoing description 5.
That is to say that in the metal vacuum container 1011A of embodiment 6, as shown in Figure 14, cylindrical body member 1023 combines with two end pieces 1022A and 1022B that are respectively applied for 1023 liang of openends of this body member of sealing; Be used as final faying face as two coupling parts 1024 between the entity plate 1023 of body member and carrying out vacuum brazing with one as two end plate 1022A, 1022B of end pieces, thus realization vacuum seal.
According to this embodiment 6, can not only obtain the effect identical, and body member 1023 can cut and form by a pipe fitting simply with embodiment 5, end pieces 1022A, 1022B can be cut simply by a plate and form, thereby make vacuum tank 1011A easily.Therefore, can improve the working (machining) efficiency of vacuum tank 1011A.
And, because the most time-consuming vacuum seal operation can be finished by vacuum brazing is carried out as final faying face in the end plate 1022 that constitutes metal vacuum container 1011A and the coupling part 1024 between the entity plate 1023 in manufacture process, thereby can significantly reduce the manufacturing time of vacuum tank 1011A.
In addition, because vacuum tank 1011A is made of metal, thereby hole A, B, C and the D that is used separately as the opening of vacuum tank 1011A can be formed required size at an easy rate, and make greatlyyer by size, can improve the efficiency of assembling of main circuit switch device fixed electrode 1004, main circuit switch device movable electrode 1005, insulating bar 1015, grounding opening-closing device fixed electrode 1007, grounding opening-closing device movable electrode 1008 and fexible conductor fixed electrode 1010 greatly them.
(embodiment 7)
Embodiments of the invention 7 have also adopted a transformation of the way form of the structure of the metal vacuum container 1011 that is adopted in the foregoing description 5; The remainder of the structure of this embodiment 6 is identical with the foregoing description 5.
That is to say that in the metal vacuum container 1011B of this embodiment 7, as shown in Figure 15, the end pieces 1022 that the band round-ended cylinder shape body member 1025 and of one one distolateral opening is used to seal these body member 1025 open end side combines; As an end plate 1022 of end pieces 1022 with divide 1024 to be used as final faying face and to carry out soldering as a junction between the entity plate 1025 of body member, thereby realization vacuum seal.
According to this embodiment 7, can not only obtain the effect identical with embodiment 5, and, because end pieces 1022 can be formed by plate cutting, body member 1025 can be formed by its blank mold pressing, just they can comparatively easily be made, thereby can improve the processability of vacuum tank 1011B greatly.
And, because the most time-consuming vacuum seal operation can be finished by vacuum brazing is carried out as final faying face in the end plate 1022 of metal vacuum container 1011B and the coupling part 1024 between the entity plate 1023 in manufacture process, thereby can significantly reduce the manufacturing time of vacuum tank 1011B.
In addition, the same with embodiment 6, because vacuum tank 1011B is made of metal, thereby hole A, B, C and the D that is used separately as the opening of vacuum tank 1011B can be formed required size at an easy rate, and make greatlyyer by size, can improve the efficiency of assembling of main circuit switch device fixed electrode 1004, main circuit switch device movable electrode 1005, insulating bar 1015, grounding opening-closing device fixed electrode 1007, grounding opening-closing device movable electrode 1008 and fexible conductor fixed electrode 1010 greatly them.
In addition, because metal vacuum container 1011B is divided into two parts, i.e. end plate 1022 and band end entity plate 1025, thereby only need a coupling part 1024, thus can further improve the efficient of brazing operation.And,, thereby can improve the reliability of vacuum tank 1011B aspect air-tightness because the quantity of coupling part 1024 is than lack one of embodiment 6.
(embodiment 8)
Embodiments of the invention 8 also provide the another kind transformation of the way form of the structure of the metal vacuum container 1011 that is adopted in the foregoing description 5; The remainder of the structure of this embodiment 8 is identical with the foregoing description 5.
That is to say that in the metal vacuum container 1011C of this embodiment 8, as shown in Figure 16, the mode that the band round-ended cylinder shape body member 1025 of two one distolateral openings abuts against each other with separately openend is bonded to each other in together; A junction between two entity plates 1025 divides 1024 to be used as final faying face and to carry out soldering, thereby realizes vacuum seal.
According to this embodiment 8, can not only obtain the effect identical with embodiment 5, and, because these two body members 1025 can form by the blank mold pressing respectively at an easy rate, thereby can improve the processability of vacuum tank 1011C greatly.
And, because metal vacuum container 1011C is divided into two parts, i.e. the entity plates 1025 at two band ends, thereby only need a coupling part 1024, thus can further improve the efficient of brazing operation.And,, thereby can also improve the reliability of vacuum tank 1011C aspect air-tightness because the quantity of coupling part 1024 is than lack one of embodiment 6.
In addition, because vacuum seal operation the most time-consuming in manufacture process can be finished by vacuum brazing is carried out as final faying face in the coupling part 1024 between two band end entity plates 1025 of metal vacuum container 1011C, thereby can significantly reduce the manufacturing time of vacuum tank 1011C.
And, because vacuum tank 1011C is made of two entity plates 1025 as two band end body members, thereby the parts that can use same type as two bands that will vertically be incorporated into together at the bottom of body member 1025, thereby allow to use the member of same type.Compare with embodiment 7, the degree of depth of vacuum tank 1011C can reduce, and this can improve band end entity plate 1025 in the processability of carrying out when molded.
In addition, compare,, can also improve its airtight reliability because the quantity of coupling part 1024 reduces to one, thereby can improve the efficient of brazing operation with embodiment 5.
(embodiment 9)
According to embodiments of the invention 9, in the above embodiments 2 and 3, as shown in Figure 17, end pieces 1022 with body member 1023 against a side be formed with a localization part 1026, can being contained in wherein of body member 1023 against the end.Here, Figure 17 is the enlarged drawing of the major part that is formed with localization part 1026 of vacuum tank.
Localization part 1026 shown in Figure 17 forms a groove, and body member 1023 can be contained in wherein in the marginal portion of its open side.Certainly, the shape of this localization part 1026 is not limited to the groove shown in this embodiment, and can adopt other anyly to be formed at processing part in the end pieces 1022 as this localization part 1026, as long as it can be convenient to determine the contact position of body member 1023 and end pieces 1022.By the way, the against vacuum sealing, the slot part 1026 that is used as localization part 1026 carries out vacuum brazing as faying face.
According to this embodiment 9, can not only obtain the effect identical with embodiment 1-3, and, owing in the coupling part of metal vacuum container 1011D, be provided with localization part 1026, thereby can further improve the efficient of brazing operation, and simplify brazing jig and improve the soldering positional precision.
By the way, as localization part 1026, as shown in Figure 18, can process a sweep 1027 that is used to make as entity plate 1023 location of body member at sidepiece as the end plate 1022 of end pieces; Perhaps, as shown in Figure 19, can process a curved slot that is used to make entity plate 1023 location at the sidepiece of end plate 1022.For any mode, all can obtain the effect identical with localization part 1026.
(embodiment 10)
According to embodiments of the invention 10, in embodiment 8, the band round-ended cylinder shape body member 1025A of two one distolateral openings and 1025B are incorporated into together in the mode that separately openend contacts with each other.In this embodiment 10, be formed with a localization part 1029, at this part place, (1025A) in the open end of two body members that abut against each other can with another (1025B) coaxial cooperation.
In the example shown in Figure 20, the end diameter of opening that is positioned at Figure 20 bottom and opening body member 1025A up is with respect to the expansion slightly that is positioned at Figure 20 top and downward opening body member 1025B, thereby forms a localization part 1029; Can match with this localization part 1029 in the end of the opening of superposed body member 1025B.By the way, this mating part carries out vacuum brazing as braze surface.
According to embodiment 10, not only can obtain the effect identical with embodiment 5, and, because localization part 1029 is in the mating part that is formed at as the coupling part of vacuum tank 1011E, thereby can improve the efficient of brazing operation, and simplify brazing jig and improve the soldering positional precision.
(embodiment 11)
In embodiments of the invention 11, in embodiment 1 to 6, for not only extending through the metal vacuum container but also towards a main circuit conductor of its inside and outside extension, the inner edge in a hole that allows main this main circuit conductor to extend through is formed with an electric field that is used for relaxing electric field and relaxes loop section.
More particularly, in structure shown in Figure 21, the part of the opposite side of the main circuit conductor 1030 that is arranged on the hole A that extends through end plate 1022 of the hole A of the end plate 1022 in the metal vacuum container 1011 (1011A-1011E), just the edge of opening of the hole A of end plate 1022 partly stretches out and forms an electric field and relaxes loop section 1031, its annular is around main circuit conductor 1030, and with the body part of main circuit conductor 1030 a suitable gap arranged.
According to this embodiment 11, can obtain the effect identical with embodiment 5.Simultaneously, because in the higher part of electric field strength a part of metal vacuum container 1011 (1011A is to 1011E) being extended into provides electric field to relax to encircle 1031, thereby electric field can be relaxed and can not increase number of components, and can improve the withstand voltage properties of switching device.
By the way, as shown in Figure 22, electric field relaxes loop section 1031 and can be formed among the hole A as the end plate 1022 of end pieces, and this end plate is done as a whole molded with entity plate 1025 when making metal vacuum container 1011 (1011A is to 1011E).Certainly, under this occasion, also can obtain identical effect.
(embodiment 12)
Power switchgear of the present invention is described with reference to the accompanying drawings.By the way, in the accompanying drawing of representing each preferred embodiment of the present invention respectively, identical or corresponding parts are represented with identical label, thereby are omitted being repeated in this description them.
Figure 23 is the cutaway view of major part of the power switchgear of first embodiment of the invention.What this power switchgear comprised mainly that the vacuum tank 2003 and of a main circuit switch portion 2001, an earthed switch portion 2002, the inside encapsulation main circuit switch portion 2001 and earthed switch portion 2002 holds vacuum tank 2003 holds insulator 2004.
Main circuit switch portion 2001 is made of one first movable electrode 2011 and one second fixed electrode 2012, the mid portion of these two electrodes is connected together by an insulator, earthed switch part 2002 is made of one second movable electrode 2021 and one second fixed electrode 2022, and first movable electrode 2011 and second fixed electrode 2022 flexibly connect conductor 2018 by one and be connected to each other.Vacuum tank 2003 comprises: a metallic vessel part 2031, and it has four the hole 2031a and the 2031b in ovalize cross section respectively, and main circuit switch portion 2001 and earthed switch portion 2002 extend parallel to each other by these holes; The insulating concrete cylinder 2321-2323 that makes by pottery respectively; Cylindrical seal 2331 and 2332; Cup seal 2341-2344, they allow in first movable electrode 2011, second movable electrode 2022, first fixed electrode 2012 and second fixed electrode 2022 any one to extend through; One cylindrical shape arc shield 2035; Bellows 2361 and 2362; And electric field relaxes ring 2371 and 2372.Holding insulator 2004 is made of a buffering ring 2411-2414 and a resin insulating barrier 2042.
The detailed structure of reference vacuum container 2003, any among any among any in the cylindrical seal 2331 or 2332, the insulating concrete cylinder 2321-2323 and the cup seal 2341-2344 are connected in and are stacked in four airtightly and be formed at the opening 2031a in the vessel part 2031 and the outside of 2031b respectively by soldering.Bellows 2361 or 2362 is connected in the periphery of the bottom surface opening of cup seal 2341 or 2342 by soldering, electric field relaxes ring 2371 is connected in opening 2031a by soldering periphery and the bottom surface that is connected in the cup seal 2343 relative with opening 2031a periphery, and electric field relaxes ring 2372 is connected in opening 2031b by soldering periphery and the bottom surface that is connected in the cup seal 2344 relative with opening 2031b periphery.By the way, insulating concrete cylinder 2322 middle body on surface within it has a ladder part, and electric arc baffle plate 2035 is installed on this step portion, between the internal perisporium surface of step portion and the electric arc baffle plate 2035 uniform gap is arranged.Insulating concrete cylinder 2321 and 2322 diameter are set the diameter greater than insulating concrete cylinder 2323 for.Its reason is that first movable electrode 2011 part in the central has an insulating bar 2011a and a pole spacing plate 2011b, and electric arc baffle plate 2035 is mounted on the middle body of insulating concrete cylinder 2322 inner surfaces.
Main circuit switch portion 2001 is installed on the middle body by vessel part 2031, insulating concrete cylinder 2321 and 2322, cylindrical seal 2331 and cup seal 2341 and 2343 formed inner spaces; Earthed switch portion 2002 is installed on the middle body by vessel part 2031, insulating concrete cylinder 2323, cylindrical seal 2332 and cup seal 2342 and 2344 formed inner spaces; Main circuit switch portion 2001 and earthed switch portion 2002 are connected to each other by bonding conductor 2018; First movable electrode 2011 is connected in and is sealed in airtightly the other end of bellows 2361 by soldering, second movable electrode 2021 is connected in and the other end that is connected bellows 2362 airtightly by soldering, first fixed electrode 2012 is connected in and is sealed in airtightly the periphery of cup seal 2343 bottom surface openings by soldering, second fixed electrode 2022 is connected in and is sealed in airtightly the periphery of cup seal 2344 bottom surface openings by soldering.The same with in the traditional vacuum switch, be the residual stress that reduces when ceramic insulating concrete cylinder 2321-2323 is carried out soldering with the coupling part between the metallic parts that are connected in them, to form, must suitably select the material and the shape of metallic parts because of their different thermal coefficient of expansions.
Buffering ring 2411-2414 is respectively that the mode with one is arranged near the outer surface of cylindrical seal 2331 or 2332 the zone, is arranged on the adjacent part of the coupling part between insulating concrete cylinder 2321 and the cup seal 2341 and is arranged on the adjacent part of the coupling part between insulating concrete cylinder 2321-2323 and the cup seal 2341-2344; Vacuum tank 2003 and the outer surface of fixed electrode 2012 and 2022 and the outer surface of buffering ring 2411-2414, except cup seal 2341 and 2342 end, bottom side and first and second fixed electrodes 2012 are connected side end with 2022 circuit, all be coated with resin insulating barrier 2042.
Buffering ring 2411-2414 can form by conductive rubber is molded by the compression mechanography, and at its molded good state, the internal diameter of each buffering ring is set at and is slightly less than the external diameter that it treats the part that matches with vacuum tank 2003.The cross sectional shape of buffering ring 2411-2414 is shown among Figure 24 A and the 24B.
Specifically, what Figure 24 represented is the cross sectional shape of buffering ring 2411 and 2412, and wherein, X1 partly covers the end of insulating concrete cylinder 2321-2323, and Y1 partly covers the end of cup seal 2341-2344 outer surface.The external diameter side angle of X1 part is rounded to a radius less than this angle thickness, thereby when buffering ring 2411 and 2412 is fit into vacuum tank 2003, can relax the electric field in this angle.The outside diameter of Y1 part forms the conical surface and makes that this conical surface end portion thickness is almost nil.And, Y1 part internal side diameter and bight chamfering X1 part adjacency, with avoid and insulating concrete cylinder 2321-2323 and cup seal 2341-2344 between the coupling part in the fillet that formed disturb.
On the other hand, what Figure 24 B represented is the cross sectional shape of buffering ring 2413 and 2414, and wherein, X2 partly covers the end of insulating concrete cylinder 2321-2323, and Y2 partly covers the outer surface of cylindrical seal 2331-2332.Treat to represent by Z with vessel part 2031 contacted end faces.The external diameter side angle of X2 part is rounded to a radius less than this angle thickness, thereby when buffering ring 2413 and 2414 is fit into vacuum tank 2003, can relax the electric field in this angle.The bight chamfering respectively of Y2 part and internal side diameter bight X2 part adjacency and end face Z, with avoid and insulating concrete cylinder 2321-2323 and cylindrical seal 2331 or 2332 between and in the coupling part between vessel part 2031 and cylindrical seal 2331 or 2332 formed fillet disturb.Plane of the Z-shaped one-tenth of end face, thereby it can closely contact with vessel part 2031.
Buffering ring 2411-2414 is used for relaxing in the neighboring of formed metal layer in the end of insulating concrete cylinder 2321-2323 of vacuum tank 2003 respectively or the electric field in the neighboring part of formed soldering fillet is concentrated in the coupling part between insulating concrete cylinder 2321-2323 and other parts.By the way, buffering ring 2411-2414 can not only prevent that resin infiltrates the soldering fillet when resin insulating barrier 2043 is mold formed, and can also relax the shrinkage stress of resin insulating barrier 2043 and the thermal stress that power switchgear produces because of variations in temperature when work.
Main circuit switch portion 2001 and earthed switch portion 2002 are fitted in the vacuum tank 2003, and 2411-2414 installs in the above described manner with buffering ring, and they are fixed in the given metal die; Then, form the resin insulating barrier 2042 of epoxy resin by injection molding.
Power switchgear according to said structure, form main circuit switch portion 2001 and earthed switch portion 2002 with two key element switches that are encapsulated in vacuum tank 2003 inside respectively, buffering ring is installed on the periphery of the coupling part between vacuum tank 2003 insulating concrete cylinders and the metallic seal, the outer surface of power switchgear, terminal part and the adjacent part that seals the mounting portion except movable electrode hold by holding insulator 2004.This structure can prevent that vacuum tank 2003 coupling part intensity from reducing, and can reduce required insulation distance between each charged part of power switchgear, thereby can realize and the equal function of traditional ring-like main switchgear in less occupying in the zone.And, under the situation about being short-circuited in power switchgear inside,, thereby do not have the possibility that the pressure in the mounting portion of power switchgear raises because this inside keeps vacuum.Therefore, be easy to a kind of as safe as a house and economic power switchgear of body plan.
In the above description, power switchgear is configured to the inside and is packaged with two key element switches, they with one by a pair of parts be a main circuit switch portion and an earthed switch portion constitute mutually corresponding.But this is not restrictive, and for example, power switchgear can be configured to and be packaged with quantity and three corresponding key element switches that synthesize an integral body.
Figure 25 is a kind of cutaway view of changing a social system the major part of form of power switchgear shown in Figure 23.This transformation of the way form and the power switchgear shown in Figure 23 have that following some is different.
Among formed two openings on main circuit switch portion 2001 sides of vessel part 2031, the size that is formed at an opening 2031c of first fixed electrode, 2012 sides equals electric arc baffle plate 2035, and an end of electric arc baffle plate 2035 is connected in the periphery of opening 2031c by soldering.Insulating concrete cylinder 2322 reduces gradually at the diameter of the adjacent part of one end thereof, and the size of insulating concrete cylinder 2322 in its this end equals insulating concrete cylinder 2323 simultaneously.
Because this transformation of the way form body plan in the above described manner, thereby also can be used as the cup seal that is connected in fixed electrode 2022 in earthed switch portion 2002 sides, thereby can reduce the species number of seal at the cup seal that main circuit switch portion 2001 sides are connected in fixed electrode 2012.
(embodiment 13)
Figure 26 is the partial sectional view of fixed electrode extension of the composite evacuated switch of second embodiment of the invention 13.
First fixed electrode 2012 ends at the inside of resin insulating barrier 2042, and is connected in a busbar connecting terminal 2052 by bonding conductor 2051.Second fixed electrode 2022 also ends at the inside of resin insulating barrier 2042, and is connected in load-side splicing ear 2054 by bonding conductor 2053.On the periphery of the load-side splicing ear 2054 of resin insulating barrier 2042 inside by a supporting insulator 2056 to be provided with a cylindrical shape voltage grading electrode that is used for voltage detecting coaxially with load-side splicing ear 2054.
When first fixed electrode 2012, bonding conductor 2051 and bus bar side splicing ear 2052 are connected together, and when second fixed electrode 2022, bonding conductor 2053 and load-side splicing ear 2054 are connected together, the bolt 2060 of their heads separately with curved cross section is fixed in together.
Because this second embodiment 13 body plan in the above described manner, be used to form in the metal die of resin insulating barrier and make synthetic one when whole of vacuum tank, main circuit switch portion and earthed switch portion when it being fixed in one, relaxed by the permission relative size error of the position relation that permissible stress determined, between each movable electrode and the fixed electrode of each soldering part.This be because in the coupling part between first fixed electrode 2012, bonding conductor 2051 and the bus bar side splicing ear 2052 and the size of the coupling part between second fixed electrode 2022, bonding conductor 2053 and load-side splicing ear 2054 can regulate.For example, by the franchise of each coupling part of suitable adjusting, can one with the corresponding assembling jig of metal die on bonding conductor 2051 and bus bar side splicing ear 2052 and second fixed electrode 2022, bonding conductor 2053 and load-side splicing ear 2054 are connected together.
This structure can improve the productivity ratio of power switchgear, reduces its manufacturing cost.And because the electric field energy in the adjacent part that conductor coupling portion is divided relaxed, thereby the thickness with the corresponding part of these parts of resin insulating barrier 2042 can reduce, and then can reduce the size of power switchgear.
And, because voltage grading electrode 2055 is with respect to the location of the metal die determining positions by load-side splicing ear 2054, thereby need not to make voltage grading electrode 2055 location from metal die, thereby can improve the efficient of positioning action.And, because voltage grading electrode 2055 can be installed in the optional position in the load-side splicing ear 2054, thereby can make the distributing electric power of the inside of resin insulating barrier 2421 reach best at an easy rate, this can help to reduce the size of power switchgear.
In above description, voltage grading electrode be arranged on the load-side splicing ear around.But this is not restrictive, for example, can adopt such structure yet, as shown in Figure 27, is connected with a capacitor 2006 from bonding conductor 2053 by a connecting line 2055, and a capacitor terminal 2061 is set on the outside of mould.
Under the capacitance settings of capacitor 2006 is situation greater than the floating capacitance between each electrode or each floating capacitance between mutually, even bus bar side or being in mutually in the charging of being adjacent to each other also can detect voltage.
As above described in detail, in switching device of the present invention, the switching mechanism such as the main circuit switch device and the grounding opening-closing device that are used for circuit between open and close bus and the load device are separately positioned in the container, this container is coated with an insulator die plastic, be formed with a conductive layer on the molded item surface and be used for ground connection, thereby not only can guarantee safety, and can reduce the area that internal tank provides the ground connection location again, thus the earth fault of preventing.The inner high vacuum that keeps of entire container, thereby need not around needs carry out the contact of vacuum extinguishing arc, baffle plate to be set, can simplify this switching device like this, make it more compact, thereby reduce the production cost and the Installation Flexibility of being convenient to improve switching device of switching device.And, owing to do not use such as SF 6And so on gas, thereby can be convenient to the processing and the control of switching device.
In switching device of the present invention, being used for being connected to each other a switching mechanism and a bus in electric power receiving element together is partly to be made of a conductor connection terminal, such as a connection piece.Therefore, a plurality of switching devices can be arranged side by side in a limited space and be connected in a bus, thereby can further improve the Installation Flexibility of switching device.
And, in switching device of the present invention, be provided with an external switch device that can switch with a grounding opening-closing device, switching device is by this external switch device ground connection, thereby can cancel the area that earthing potential is provided of internal tank, so just can prevent to produce earth fault at internal tank.Therefore, can improve the reliability and the fail safe of this switching device, the structure of simplification and miniaturization switching device, the production cost of reduction switching device increases the Installation Flexibility of switching device, and is convenient to the processing and the control of switching device.
In switching device of the present invention, a plurality of vacuum tanks can be by the synthetic integral body of a molded item.Therefore, the size of switching device can be reduced, and the Installation Flexibility of switching device can be improved.
In switching device of the present invention, electric conducting material such as electroconductive resin is molded into cylindrical shape or the rectangular box bodily form and produces a ground connection electric-conductor, one vacuum tank is contained in this ground connection electric-conductor, and they make the ground connection electric-conductor be exposed to the vacuum tank surface by the synthetic integral body of a molded item.This can be convenient to form a conductive layer on the molded item surface when making switching device.
And in switching device of the present invention, the electric-conductor such as metal baffle that need bury underground is embedded in the molded item in the mode relative with the load-side conductor, thereby can realize a circuit with the capacitor equivalence.This can be convenient to the situation of switching device is carried out checked operation, such as the voltage detecting to switching device.
In switching device of the present invention, vacuum tank is coated with padded coaming, they are by the synthetic integral body of molded item, and this padded coaming is held between vacuum tank and the molded item, can prevent from like this to cause separated from one another because of different linear expansion coefficients between vacuum tank and the molded item.
According to the present invention, main circuit switch portion can freely be arranged on vacuum tank inside relatively with the grounding opening-closing device grounding parts.Therefore, can provide a kind of compact conformation, low cost of manufacture, be convenient to handle and the vacuum insulated switch gear of function admirable.
According to the present invention,, thereby can significantly reduce the manufacturing time of switching device because the most time-consuming vacuum seal operation can be finished by vacuum brazing in the switching device manufacture process.
And, because vacuum tank is to be made of a plurality of parts that suitably separate, thereby can improve the processability of vacuum tank.
In addition, because vacuum tank is made of metal, thereby can selectively be provided with the opening of vacuum tank bigger, this can improve the efficiency of assembling of each components and parts such as main circuit switch device fixed electrode, main circuit switch device movable electrode, insulating bar, grounding opening-closing device fixed electrode, grounding opening-closing device movable electrode and fexible conductor fixed electrode.
According to the present invention,, thereby can improve the efficient of the brazing operation of vacuum tank because the metal vacuum container only needs a coupling part.
And the minimizing of vacuum tank quantity can improve the reliability of the air tightness of vacuum tank.
According to the present invention, owing on the coupling part of the metal vacuum container that is molded as by two or more parts, carried out positioning action, thereby not only can improve the efficient of vacuum tank brazing operation, but also can simplify brazing jig, improve the soldering positional precision.
According to the present invention, owing in the higher part of electric field strength, a part of metal vacuum container is extended to form annular section and be used to relax electric field, thereby can relax electric field and can not increase number of components, thereby can improve the withstand voltage properties of switching device.
In power switchgear of the present invention, because the insulating concrete cylinder of vacuum tank and the adjacent part of the coupling part between the metal vacuum container part are covered by the buffering ring of making by conductive rubber, and all resin insulating barrier is arranged by the part that buffering ring covers with the vacuum tank outer surface, thereby the electric field that can relax in the neighboring part of formed fillet in the coupling part is concentrated from its outer side covers.And this power switchgear can prevent that resin infiltrates soldering fillet part when resin insulating barrier is mold formed, and can relax the shrinkage stress of resin insulating barrier and the thermal stress that this power switchgear produces because of variations in temperature when work.
One end of each conductive rubber buffering ring covers the peripheral end of insulating concrete cylinder, the other end of conductive rubber buffering ring covers the periphery of metal vacuum container part, the end angular of the covering insulating concrete cylinder peripheral end of buffering ring is rounded to a radius that is slightly less than this angle thickness, the end outer periphery surface of the covering metal vacuum container features neighboring of buffering ring forms conical surface respectively, the thickness of its jag is almost nil, and the step portion of the interior perimeter surface of buffering ring is chamfered to be a size greater than formed soldering fillet size in the coupling part respectively.Structure whereby, the electric field that can more effectively relax in the neighboring part of formed fillet in the coupling part is concentrated.
And, one end parts of each conductive rubber buffering ring covers the peripheral end of insulating concrete cylinder, the other end of conductive rubber buffering ring partly covers the neighboring of metal vacuum container features, the end angular of the covering insulating concrete cylinder peripheral end of buffering ring is rounded to a radius that is slightly less than this angle thickness, the end of the covering metal vacuum container features neighboring of buffering ring is formed at respectively in the plane of axially intersecting with insulating concrete cylinder, and the internal side diameter end angular of the covering metal vacuum container features neighboring of the step shape part of the interior perimeter surface of buffering ring and buffering ring is chamfered to be one respectively greater than the size that is formed at the soldering fillet size in the coupling part.The electric field that this structure can more effectively relax in the neighboring part of formed fillet in the coupling part is concentrated.
The bonding conductor that is connected in the power switchgear outside owing to the electrode with the key element switch is to be connected in resin insulating barrier inside by fixture, thereby can improve the productivity ratio of power switchgear, and reduces its manufacturing cost.
And, because the bolt that uses the curved cross section of a kind of head is as fixture, therefore, can relax the electric field in the adjacent part that conductor coupling portion divides, and can reduce resin insulating barrier and the corresponding thickness partly of this adjacent part, thereby can reduce the size of power switchgear.
In addition, owing to provide a voltage grading electrode in the periphery of the bonding conductor in resin insulating barrier, this voltage grading electrode can be located by an insulator that is fixed in bonding conductor, thereby need not position voltage grading electrode on metal pattern plastic side, thereby can improve the efficient of positioning action.And,, thereby can optimize the voltage distribution of resin insulating barrier inside at an easy rate and reduce the size of power switchgear because voltage grading electrode can be installed in any position in the contiguous conductor.
In addition, inside at resin insulating barrier, be provided with a voltage-dividing capacitor, its structure is made and is made one electrode be connected in bonding conductor, its electrostatic capacitance is greater than between all electrodes and with respect to the floating capacitance between all phases of bonding conductor, therefore, even bus bar side or being in mutually in the charging of being adjacent to each other also can detect voltage.

Claims (12)

1. switching device, it comprises:
One switching mechanism, this switching mechanism comprises:
One first fixed contact piece;
One second fixed contact piece;
But one can with contact of this first fixed contact piece and first moving contacting plate that separates, this is first movable
Contact chip is electrically connected in this second fixed contact piece; And
But one can contact and second moving contacting plate that separates with second fixed contact piece;
One the inside holds vacuum tank this switching mechanism and that made by metal material; And
One is molded and cover the insulator die plastic of this vacuum tank, wherein forms a conductive layer on the outer surface of this insulator die plastic.
2. switching device as claimed in claim 1 is characterized in that it further comprises:
One is electrically connected in the electric power receiving element of this first fixed contact piece;
But one is electrically connected in the earthing member of this second moving contacting plate; And
One is electrically connected in the distributing electric power spare of this second fixed contact piece.
3. switching device as claimed in claim 2 is characterized in that it further comprises:
But an external switch device that can switch with second moving contacting plate, wherein earthing member be formed at the lip-deep conductive layer insulation of insulator die plastic, and by this external switch device ground connection.
4. switching device as claimed in claim 1 is characterized in that, this vacuum tank comprises two or more containers by the synthetic integral body of insulator die plastic.
5. switching device as claimed in claim 1 is characterized in that, this vacuum tank is made of a cylindrical body member and two end pieces of sealing these body member two ends respectively.
6. switching device as claimed in claim 1 is characterized in that, this vacuum tank is made of the band round-ended cylinder shape body member of one one distolateral opening and the end pieces of this body member openend of sealing.
7. switching device as claimed in claim 1 is characterized in that, this vacuum tank is made of the band round-ended cylinder shape body member of two one distolateral equal openings, and these two body members combine and their openends are separately contacted with each other.
8. switching device as claimed in claim 5 is characterized in that, is resisted against in the end pieces of body member waiting, forms a localization part being contained in wherein against the end for body member.
9. switching device as claimed in claim 1, it is characterized in that, make it not only extend through vacuum tank but also towards the main circuit conductor of its inside and outside extension for an one-tenth to be installed, in the inner edge in a hole that allows main circuit conductor to extend, be formed with an electric field that is used to relax electric field and relax loop section in this mode.
10. switching device as claimed in claim 1, it is characterized in that, this vacuum tank comprises insulating concrete cylinder and metal workpieces, one adjacent part of the coupling part between the metal workpieces of insulating concrete cylinder and vacuum tank is coated with the buffering ring of making by conductive rubber, the part that resin insulating barrier is covered by buffering ring from outer side covers, and the outer surface of covering vacuum container.
11. switching device as claimed in claim 10, it is characterized in that, one end parts of each buffering ring covers the peripheral end of insulating concrete cylinder, the neighboring of the metal workpieces of the other end part covering vacuum container of buffering ring, the end angular of the covering insulating concrete cylinder peripheral end of buffering ring is rounded to a radius that is slightly less than this angle thickness, the outer periphery surface of the end of the metal workpieces neighboring of the covering vacuum container of buffering ring forms conical surface respectively, the thickness of its jag is almost nil, and the step portion of the interior perimeter surface of buffering ring is chamfered to be a size greater than formed soldering fillet size in the coupling part respectively.
12. switching device as claimed in claim 10, it is characterized in that, one end parts of each buffering ring covers the peripheral end of insulating concrete cylinder, the neighboring of the metal workpieces of the other end part covering vacuum container of buffering ring, the end angular of the covering insulating concrete cylinder peripheral end of buffering ring is rounded to a radius that is slightly less than this angle thickness, the end of the metal workpieces neighboring of the covering vacuum container of buffering ring is formed at respectively in the plane of axially intersecting with insulating concrete cylinder, and the internal side diameter end angular of the covering metal vacuum container features neighboring of the step shape part of the interior perimeter surface of buffering ring and buffering ring is chamfered to be one respectively greater than the size that is formed at the soldering fillet size in the coupling part.
CNB001049356A 1999-04-01 2000-03-31 Switch device and power drived switch apparatus Expired - Fee Related CN1173378C (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP095583/1999 1999-04-01
JP09558399A JP3775939B2 (en) 1999-04-01 1999-04-01 Switchgear
JP303732/1999 1999-10-26
JP30373299A JP3905266B2 (en) 1999-10-26 1999-10-26 Vacuum insulated switchgear
JP353222/1999 1999-12-13
JP35322299A JP3758435B2 (en) 1999-12-13 1999-12-13 Power switch

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CN1269591A CN1269591A (en) 2000-10-11
CN1173378C true CN1173378C (en) 2004-10-27

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KR (1) KR100370934B1 (en)
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AT (1) ATE276580T1 (en)
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HK (1) HK1030093A1 (en)
SG (1) SG87097A1 (en)
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EP1041593B1 (en) 2004-09-15
KR100370934B1 (en) 2003-02-05
DE60013673T2 (en) 2005-09-29
EP1041593A3 (en) 2002-12-04
EP1041593A2 (en) 2000-10-04
HK1030093A1 (en) 2001-04-20
ATE276580T1 (en) 2004-10-15
SG87097A1 (en) 2002-03-19
CN1269591A (en) 2000-10-11
KR20010020693A (en) 2001-03-15
DE60013673D1 (en) 2004-10-21

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