WO2016199326A1 - ガス絶縁スイッチギヤの開閉器およびガス絶縁開閉装置 - Google Patents
ガス絶縁スイッチギヤの開閉器およびガス絶縁開閉装置 Download PDFInfo
- Publication number
- WO2016199326A1 WO2016199326A1 PCT/JP2015/083577 JP2015083577W WO2016199326A1 WO 2016199326 A1 WO2016199326 A1 WO 2016199326A1 JP 2015083577 W JP2015083577 W JP 2015083577W WO 2016199326 A1 WO2016199326 A1 WO 2016199326A1
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- WIPO (PCT)
- Prior art keywords
- switch
- blade
- gas
- insulated switchgear
- phase
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/42—Driving mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/022—Details particular to three-phase circuit breakers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
- H01H33/121—Load break switches
- H01H33/122—Load break switches both breaker and sectionaliser being enclosed, e.g. in SF6-filled container
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/64—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid wherein the break is in gas
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/075—Earthing arrangements
Definitions
- the present invention relates to a switch and a gas-insulated switchgear switch and a gas-insulated switchgear having a three-position switch that allows selection of a switching stage between on, off, and grounding in a sealed container filled with an insulating gas. It relates to the device.
- Patent Document 1 In the conventional three-position switch, as shown in Patent Document 1, when the insulative connecting rod attached to the three-phase blade is moved substantially horizontally, the blade moves in an arc shape to the on / off / ground position. As shown in Patent Document 2, there are movable contacts and fixed contacts at both ends of the vacuum valve, and the three-phase fixed contacts are connected while being insulated. There has been proposed a structure in which a movable part including a vacuum valve rotates around a fixed contact member, in which the rotating shaft of the movable part and the connecting drive part are in the same direction.
- the switch tank that is one of the components of the gas-insulated switchgear can be reduced in size by reducing the layout of the main circuit conductor because it contains the insulating gas.
- a mechanism that transmits the driving force to the phase since a plurality of insulating parts, bolts, and pins are used, it is difficult to install and connect them in a small partitioned sealed container. There was an inconvenience that required man-hours.
- the three-phase arrangement of switch blades that are turned on, off, and grounded by rotating operation in a coaxial line contributes to reducing the tank width, but in a narrow space.
- the switch of the gas insulated switchgear supports a multi-phase switch blade that switches between three positions of on / off and ground by a rotating shaft, and supports each of these phase switch blades and A switch provided with an interphase coupling mechanism made of an insulator for coupling and cooperating between the switch blades, the interphase coupling mechanism being a fitting composed of a large-diameter endless frame body and a small-diameter endless frame body that are fitted together.
- the fitting couplings and the respective fitting couplings are arranged on the same axis.
- the switch for a gas-insulated switchgear it is possible to reduce the mounting and connecting work using the pins and bolts of the main circuit parts in a small partitioned container, and therefore the assembling work can be reduced. This makes it easier to do this, reduces the number of parts, and reduces the number of man-hours for assembling work, which can reduce the manufacturing cost of the gas-insulated switchgear.
- FIG. 1 shows the overall configuration of a gas-insulated switchgear according to Embodiment 1 of the present invention, where (a) is a side sectional view, (b) is a front sectional view of a line BB in FIG.
- FIG. 6C is a plan view of the AA line in FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the internal structure of the switch tank of the gas insulation switchgear in Embodiment 1 of this invention, (a) is front sectional drawing, (b) is side sectional drawing, (c) is in figure (a).
- FIG. 4D is a plan view of the CC line viewed in the arrow direction, and FIG. 4D is a front cross-sectional view of the BB line in FIG.
- FIG. 2A is a front view showing each state of the operation of the switch blade 12 “ON-CUT-GROUND”, in which FIG. 2A shows the switch blade in the ON state, and FIG. 2B shows the switch blade in the cut-off state.
- C is a figure which shows a switch blade in a grounding state.
- the phase connection mechanism 13 which supports the switch blade 12 in Embodiment 1 of this invention is shown, (a) is a disassembled perspective view, (b) is a perspective view of an assembly state.
- connection adapter 14 and the seal shaft 16 of the interphase connection mechanism in Embodiment 1 of this invention are shown, (a) is a front view of the connection adapter 14, (b) is a sectional side view along the center line of the connection adapter 14, (c) ) Is a rear view of the connection adapter 14, (d) is a cross-sectional view showing the mounting state of the connection adapter 14, the seal case 15, and the seal shaft 16 in the tank wall penetrating portion of the switch tank 2, and (e) is the tank wall removed.
- FIG. 6 is a front view as viewed from the XX direction of (d) in the state as described above.
- the phase connection mechanism 18 which supports the switch blade 12 in Embodiment 2 of this invention is shown, (a) is a left view, (b) is a front view, (c) It is a rear view.
- (D) is a cross-sectional view of the DD line in FIG. 6A (a) as seen in the arrow direction
- (e) is a cross-sectional view of the EE line in FIG. 6A (b) as seen in the arrow direction
- FIG. 6F is a cross-sectional view of the FF line located at the central axis of the pin 17a in the arrow direction in FIG. 6A (a).
- (G) is a cross-sectional plan view as viewed in the YY direction of FIG.
- FIG. 6B (e), (h) is a front view of the switch blade 12 shown in FIG. 6B (e), and (i) is the right side of FIG.
- FIG. 7 is a diagram showing an internal structure of a switch tank for a gas-insulated switchgear according to Embodiment 2 of the present invention, where (a) is a right side view, and (b) is a GG line in FIG. FIG. It is a perspective view which shows the assembly state of the phase connection mechanism 18 which supports the switch blade 12 in Embodiment 2 of this invention.
- connection adapter 14 in Embodiment 2 of this invention is shown, (a) is a front view of the connection adapter 14, (b) is a sectional side view of the center line of the connection adapter 14, (c) is a rear view of the connection adapter 14. It is.
- FIG. 1 A gas-insulated switchgear according to the first embodiment will be described with reference to FIGS.
- a gas insulated switchgear 1 having an overall configuration shown in FIG. 1 includes a circuit breaker tank (first sealed container) 3 that houses a circuit breaker 6, a circuit breaker operating mechanism 8 that operates the circuit breaker 6, a switch 20 Switch tank (second sealed container) 2 containing horizontal bus 9, switch operating mechanism 7 for operating switch 20, power cable for taking in power from the power system or sending power to the load 4 or the like.
- the gas insulated switchgear When the gas insulated switchgear is for power supply, it receives power from the bus and supplies power to the power cable 4 connected to the load via the switch 20-compartment bushing 5-breaker 6.
- An insulating gas such as SF6 gas or dry air is sealed in the circuit breaker tank 3 to insulate the accommodation device and the main circuit conductor.
- FIG. 2 shows the internal structure of the switch tank 2 of the gas insulated switchgear 1 shown in FIG. 1, and the switch tank switch 20 penetrates from the circuit breaker tank 3 to the switch tank 2 in an airtight manner.
- the section bushing side fixed terminal 11c, the switch blade 12 and the inlet side fixed terminal 11a are connected to the bus bushing 10 to supply power to the bus.
- the connection between the bus bushing 10 and the bus bushing 10 is connected by a horizontal bus 9.
- the switch 20 is grounded when the switch blade 12 is engaged with the ground-side fixed terminal 11 b fixed to the switch tank 2.
- 17 is couple
- FIG. 3 shows an operating state of the switch 20, and the switch 20 has a three-phase switch blade 12.
- Each switch blade 12 is rotated counterclockwise from the switch operating mechanism 7 from the front.
- a three-position switching state is established between the on position in FIG. 3A, the cut position (disconnect position) in FIG. 3B, and the ground position in FIG. 3C.
- the switch blades 12 of each phase are respectively supported by an interphase connection mechanism 13 whose detailed configuration is shown in FIG. 4, and this interphase connection mechanism 13 connects and shares the phase switch blades as will be described later. Move.
- FIG. 4 shows an interphase coupling mechanism 13 that supports the switch blade 12, and in this example, three interphase coupling mechanisms 13 are coupled as three phases.
- the interphase coupling mechanism 13 includes a box-shaped blade support portion 13c made of an insulating material having a square cross section for supporting the switch blade 12 and an insulating fitting coupling that also serves as a blade rotation shaft of the switch blade 12. 13ab.
- the blade support portion 13c has a rectangular box shape.
- the switch blade 12 is housed in the box, and is cut off from the input side fixed terminal 11a or the ground side fixed terminal 11b.
- the outer periphery of the switch blade 12 is covered, leaving only the contact portion at the tip that is separated.
- the switch blade 12 is surrounded and held so that only the contact portion at the tip of the switch blade 12 protrudes from the tip of the box-shaped blade support portion 13c. Further, the width of the blade support portion 13c in the inter-phase direction of the main circuit is made larger than the attachment width of the contact pressure spring 17 and the pin 17a (that is, the charging portion of the switch blade 12) attached to the switch blade 12. Therefore, the electric field between the main circuit phases or the ground between the contact pressure spring 17 and the pin 17a can be relaxed, so that the insulation performance between the phases of the switch blade 12 or between the ground can be enhanced.
- the fitting coupling 13ab is for transmitting a driving force transmitted from a seal shaft 16 (described later) connected to the switch operating mechanism 7 via a connection adapter 14 (described later) to an adjacent phase.
- the fitting coupling 13ab has a cup-shaped small-diameter endless frame portion 13S having a plurality of convex-shaped portions 13a on the outer peripheral surface and protruding in the blade rotation axis direction, and a plurality of concave-shaped portions 13b on the inner peripheral surface. It is composed of a cup-shaped large-diameter endless frame portion 13G that protrudes in the direction of the blade rotation axis, and is disposed in the opposite direction on the same axis.
- the fitting coupling 13ab is formed by fitting the convex-shaped part 13a and the concave-shaped part 13b mutually, and functions as a rotating shaft part of the switch blade 12 as mentioned above.
- the fitting coupling 13ab can be brought into and out of contact with each other by sliding the convex shape portion 13a and the concave shape portion 13b in the rotation axis direction, and the convex shape portion 13a and the concave shape portion 13b are engaged with each other. Link.
- the convex shape portion 13a and the concave shape portion 13b have a thickness and a number so that the necessary torsional strength can be obtained based on the load when the switch blade 12 is joined to the input side fixed terminal 11a and the ground side fixed terminal 11b.
- the shape is determined. Although it is divided into 12 in the figure, the number of divisions is not limited thereto.
- the convex shape part 13a and the concave shape part 13b are normally set to the same number on operation
- each member (13ab, 13a, 13b, 13c, 13G, 13S) which comprises the interphase connection mechanism 13 is comprised with the insulator.
- thermoplastic resin polybutylene terephthalate [PBT]
- thermosetting resins epoxy, etc.
- connection mechanism of the interphase connection mechanism 13 to the switch operating mechanism 7 is a gear-shaped metal connection adapter 14 that engages (fits) the concave portion 13b of the large-diameter endless frame portion 13G of the interphase connection mechanism 13.
- the seal case 15 that engages with the outside while ensuring the air tightness of the inside and outside of the sealed container, the seal shaft 16, the presser fitting 30, and other members will be described in detail with reference to FIG. *
- the coupling mechanism constitutes a through portion of the tank wall 2 a of the switch tank 2.
- the connection adapter 14 has a counterbore 14a and a hexagonal through hole 14b as shown in FIGS. 5A to 5C, and the seal shaft 16 is fitted to the counterbore 14a at the inner end.
- the flange-shaped large-diameter portion 16b to be combined and the hexagonal bar-shaped engaging portion 16a inserted into the hexagonal through-hole 14b are provided inside the large-diameter portion 16b.
- connection adapter 14 With this configuration, the rotational drive torque from the seal shaft 16 is transmitted to the connection adapter 14 via the hexagonal through hole 14b and the hexagonal bar-like engagement portion 16a, and the teeth on the outer peripheral portion of the connection adapter 14 are further transmitted. Since 14 c is engaged with the concave portion 13 b of the interphase coupling mechanism 13, the driving force of the coupling adapter 14 is transmitted to the interphase coupling mechanism 13, and the switch 20 is opened and closed by driving the interphase coupling mechanism 13.
- the seal shaft 16 penetrating the tank wall is fitted with the seal case 15 coaxially on the outer periphery thereof, and the end is formed in a hexagonal bar shape, and is fitted with a drive shaft (not shown) from the switch operating mechanism 7.
- a drive shaft (not shown) from the switch operating mechanism 7.
- the drive torque is transmitted to the seal shaft 16.
- the outer peripheral surface of the seal shaft 16 for mounting the seal case 15 on the outer periphery is finished in a smooth cylindrical shape, and a plurality of O mounted in seal grooves formed in a concave shape on the inner periphery of the seal case 15. It is in sliding contact with a seal member (not shown) such as a ring to maintain airtightness.
- a concave seal groove is formed on the mounting surface of the seal case 15 that contacts the tank wall surface, and airtightness is maintained between the tank wall and a seal member (not shown) such as an O-ring mounted in the seal groove.
- a seal member such as an O-ring mounted in the seal groove.
- On the outer surface of the tank wall 2a an axial center parallel to the axial center of the through hole is provided at a position separated from each other by a predetermined distance across the through hole 2b of the tank wall 2a when viewed from the front side of the gas insulating switch gear 1.
- Two studs 31 are welded. A male screw is formed on the outer periphery of each stud 31, and a presser fitting 30 formed in an L shape is fastened and fixed to the stud 31 with a nut 32. Then, one end of the L-shaped presser fitting presses the seal case 15 against the tank wall side to maintain the airtightness of the tank wall penetrating portion.
- the coupling to the adjacent phase is configured by the engagement of the convex shape portion 13 a and the concave shape portion 13 b, and as shown in FIG. 4, as shown in FIG.
- the engagement shape is a cylinder in this embodiment, but it can also be realized by a combination of polygons such as triangles.
- the uneven shape is not necessary, and a shape in which the concave portion and the convex portion of the polygon shape itself are combined may be used.
- the tank wall penetration portion of the switch tank 2 airtight as described above, an airtight structure with a simple structure can be obtained, and a gas insulation switchgear that is easy to manufacture and compact can be obtained.
- the function can be achieved by engaging the concave and convex portions that are the shapes of the interphase coupling mechanism 13. Therefore, there is an effect that the number of parts can be reduced.
- the charging unit such as the blade is barrier-insulated by the interphase coupling mechanism 13
- the insulation distance between the phase and the ground can be reduced, and the switch tank can be reduced in size.
- FIG. A gas-insulated switchgear according to Embodiment 2 will be described based on FIGS. 6A to 9.
- the interphase coupling mechanism 18 that supports the switch blade 12 serves as a current path that diverts from the partition bushing-side fixed terminal 11c to the two switch blades 12, and contacts each of the fixed side and the movable side.
- This is a structure in which a load is applied to the contact portion of the conductor by pin coupling of the contact pressure spring 17 and the pin 17a.
- the interphase coupling mechanism 18 that supports the switch blade 12 includes a box-shaped blade support portion 18e having a square cross section that supports the switch blade 12, and a fitting coupling 18ab that also serves as the blade rotation axis of the switch blade 12.
- connection mechanism of the interphase connection mechanism 18 to the switch operating mechanism 7 is a metal that engages (fits) with the recessed portion 18b of the large-diameter endless frame portion 18G of the interphase connection mechanism 18 as shown in FIG. It comprises a seal case 15 and a seal shaft 16 that engage with the outside while ensuring the airtightness inside and outside of the switch adapter 14 (FIG. 9) and the switch tank 2 (sealed container).
- the fitting coupling 18ab has a cup-shaped small-diameter endless frame portion 18S having a convex-shaped portion 18a on the outer peripheral surface and protruding in the blade rotation axis direction, and a concave-shaped portion 18b on the inner peripheral surface. It is comprised with the cup-shaped large diameter endless frame part 18G which protrudes to an axial direction, and is arrange
- the fitting coupling is formed by fitting the convex portion 18a and the concave portion 18b to each other, and functions as the rotating shaft portion of the switch blade 12 as described above.
- the fitting coupling 18ab is connected so as to be able to contact and separate by a convex portion 18a and a concave portion 18b.
- the concavo-convex shape shows an example of six divisions.
- the interphase coupling mechanism 18 when the interphase coupling mechanism 18 is formed with a thin-wall structure such as a molded product, the stress generated in the notch portion due to the joining of the parts can be reduced by attaching the reinforcing rib 18c as shown in FIG. 6B (d). . Positioning of the interphase coupling mechanism 18 in the height direction (longitudinal direction of the blade) is performed by positioning pins 19 attached between the two switch blades 12 as shown in FIGS. 6B (d) and 6B (e).
- the interphase coupling mechanism 18 is restrained from moving in the longitudinal direction of the blade, and is held at a predetermined position without moving in the longitudinal direction of the blade even when the interphase coupling mechanism 18 is rotated. Is done.
- the hole 12b for the positioning pin 19 formed in the switch blade 12 is a blind hole that does not penetrate the switch blade 12, and the positioning pin 19 is predetermined in a form sandwiched between the two switch blades 12. Held in position.
- each member (18ab, 18a, 18b, 18c, 18d, 18e, 18f) which comprises the interphase connection mechanism 18 is comprised with an insulator.
- an insulator a thermoplastic resin (polybutylene terephthalate [PBT], polyethylene, polypropylene, etc.) or a thermosetting resin (epoxy, etc.) is used.
- the interphase coupling mechanism 18 increases the outer diameter (radius) of the convex-shaped portion 18a and the concave-shaped portion 18b, so that the switch blade 12 becomes a fixed-side terminal (the input-side fixed terminal 11a, the ground-side fixed terminal 11b). By dividing the load torque generated when biting into the gear by the increased radius, the load applied to the fitting portion is reduced, and the stress generated in the portion can be reduced. Furthermore, the interphase coupling mechanism 18 increases the overlap margin L (FIG. 7A) of the concavo-convex portion fitting portion so that the load torque generated when the switch blade 12 bites into the fixed terminal is fitted to the fitting portion. It is possible to reduce the surface pressure by increasing the area of the same portion as the load applied to the surface.
- the backlash of the fitting coupling 18ab of the interphase coupling mechanism 18 causes an angle shift to the adjacent phase, and the operation is always performed from the side close to the operation mechanism.
- the peak of the load force can be dispersed.
- FIG. 7 is a form in which the interphase coupling mechanism 18 is incorporated in the switch tank 2 of FIG. 2 (Embodiment 1), and the switch blade 12 is bitten by taking a large allowance between the concave and convex portions.
- grooved part with respect to the maximum load at the time is shown.
- two switch blades 12 are mounted in a box-shaped blade support 18e having a square cross section of the correlation connecting mechanism 18 as shown in FIG. 6B (e).
- the switch blade 12 is assembled by first inserting a pin 17a fitted with a contact pressure spring 17 inserted into a base end side hole of the switch blade 12 into a blade mounting hole (not shown) of the partition bushing side fixed terminal 11c. Then, the switch blade 12 is rotatably mounted (FIG. 6B (e)). At this time, the positioning pin 19 is also mounted so as to be sandwiched between the two switch blades 12.
- the switch blade 12 is inserted in a state where the internal partition wall 18f is sandwiched in a box-shaped blade support portion 18e having a square cross section of the correlation connecting mechanism 18 (FIG. 6C (g)). Insert the switch blade 12 from the other end of the blade support 18e to the position where the head protrudes, then insert the pin 17a with the contact pressure spring 17 into each hole on the tip side of the two switch blades 12, The assembly of the two switch blades 12 is completed. Thereafter, the connecting portion protruding to the left of the partition bushing-side fixed terminal 11c shown in FIG. 6B (d) is connected to the through conductor (not shown) of the partition bushing 5 shown in FIGS. 7 (b) and 2 (d). 6c (g), and is tightened and connected with, for example, a bolt using the mounting hole 11d of the partition bushing side fixed terminal 11c shown in FIG. 6C (g). In this way, the three-position switch is assembled.
- the effect of reducing the number of parts and the effect of reducing the size of the switch tank can be obtained as in the first embodiment. Further, by having the reinforcing ribs 18c of the interphase coupling mechanism 18 on one side or symmetrically as shown in FIG. 6C (g), the reinforcing function of the square box-shaped blade support portion 18e covering the switch blade is obtained. The effect of increasing the torsional strength that the coupling mechanism 18 can withstand is obtained.
- the small-diameter endless frame portions 13S and 18S and the large-diameter endless frame portions 13G and 18G have been described as cups, but the present invention is not limited thereto. Instead, the cup-shaped structure may be filled with an insulator. Also, in the present invention, each embodiment can be appropriately modified or omitted within the scope of the invention.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
Description
また、開閉器用タンクに於いて、回転動作により入、切、接地を行う開閉器のブレードを同軸直線状に三相配置することは、タンク幅を縮小することに寄与するが、狭いスペースの中で相間、対地間の絶縁を図りながら、三相のブレードに回転駆動力を与える絶縁性の機構部の係合構造及び駆動力の伝達構造には、技術的困難性があった。
この発明は、部品点数削減し組立性を向上した、ガス絶縁スイッチギヤの開閉器およびガス絶縁開閉装置を得ることを目的とするものである。
なお、各図間において、同一符号は同一あるいは相当部分を示す。
図1~図5に基づいて実施の形態1におけるガス絶縁スイッチギヤを説明する。
図1に全体構成を示したガス絶縁スイッチギヤ1は、遮断器6を収納した遮断器用タンク(第1の密閉容器)3、遮断器6の操作を行う遮断器用操作機構8、開閉器20と水平母線9を収納した開閉器用タンク(第2の密閉容器)2、開閉器20の操作を行う開閉器用操作機構7、電力系統から電力を取込んだり、または負荷へ電力を送り出すための電力ケーブル4などで構成されている。
ガス絶縁スイッチギヤが給電用の場合は、母線から受電し、開閉器20-区画ブッシング5-遮断器6を経由して負荷に接続された電力ケーブル4へ給電する。なお、遮断器用タンク3の中には、SF6ガス又は乾燥空気等の絶縁性ガスが封入され、これにより収容機器及び主回路導体を絶縁する。
また、各相の開閉器ブレード12は、詳細構成を図4に示した相間連結機構13によってそれぞれ支持され、この相間連結機構13は、後述するように各相開閉器ブレード間を連結し且つ共動させる。
この相間連結機構13は、開閉器ブレード12を支持する断面が四角形の絶縁物製の箱形のブレード支持部13cと、開閉器ブレード12のブレード回転軸を兼ねた絶縁物製の嵌合カップリング13abとで構成されている。ブレード支持部13cは、図4に示すように、四角形の箱形としており、この箱内に前記開閉器ブレード12を収納しており、前記入側固定端子11aあるいは前記接地側固定端子11bと切離する先端の接触部だけを残して開閉器ブレード12の外周を覆っている。すなわち、開閉器ブレード12の先端の接触部だけが箱状のブレード支持部13cの先端から突出した状態に開閉器ブレード12を包囲し保持している。
また、主回路の相間方向にみたブレード支持部13cの幅は、前記開閉器ブレード12に装着した接圧ばね17及びピン17a(すなわち、開閉器ブレード12の充電部)の取り付け幅よりも大きくしているため、接圧ばね17及びピン17aの取り付け部における主回路相間あるいは対地間の電界を緩和できるため、開閉器ブレード12の相間あるいは対地間の絶縁性能を高くすることができる。
嵌合カップリング13abは、外周面に複数の凸形状部13aを有しブレード回転軸方向に突出するカップ状の小径無端枠体部13Sと、内周面に複数の凹形状部13bを有しブレード回転軸方向に突出するカップ状の大径無端枠体部13Gで構成され、同一軸線上にそれぞれ反対方向に配置されている。
そして、凸形状部13aと凹形状部13bとを互いに嵌合することより嵌合カップリング13abを形成し、且つ上述したように開閉器ブレード12の回転軸部として機能する。なお、嵌合カップリング13abは、凸形状部13aと凹形状部13bを回転軸方向にスライドさせることによって接離可能となっており、凸形状部13aと凹形状部13bを互いに係合させて連結する。
なお、相間連結機構13を構成する各部材(13ab、13a、13b、13c、13G、13S)は絶縁物によって構成されており、その絶縁の材料としては、熱可塑性樹脂(ポリブチレンテレフタレート[PBT]、ポリエチレン,ポリプロピレン など)や熱硬化性樹脂(エポキシなど)が使用される。
このため、ブレード支持部13cは、相間、対地間に対して、絶縁バリヤの効果を有している。
連結アダプター14は、図5(a)から(c)に示すように座ぐり部14aと六角状貫通穴14bを有し、また、シール軸16は、内端部に前記座ぐり部14aに嵌め合わせられる鍔状の大径部16bと、この大径部16bの内側に、六角状貫通穴14bに貫挿される六角棒状の係合部16aとを有している。
このように構成することにより、六角状貫通穴14bと六角棒状の係合部16aを介してシール軸16からの回動駆動トルクが連結アダプター14に伝えられ、更に連結アダプター14の外周部の歯14cが相間連結機構13の凹形状部13bと係合しているため、連結アダプター14の駆動力が相間連結機構13に伝えられ、更に相間連結機構13の駆動によって開閉器20を開閉動作させる。
また、開閉器用タンク2のタンク壁貫通部を上記のような気密構成にすることにより、簡単な構成の気密構造を得ることができ、製造が容易でコンパクトなガス絶縁スイッチギヤを得ることができる。
図6A~図9に基づいて実施の形態2におけるガス絶縁スイッチギヤを説明する。
実施の形態2における、開閉器ブレード12を支持する相間連結機構18は、区画ブッシング側固定端子11cから2枚の開閉器ブレード12へと分流する電流経路とし、固定側と可動側のそれぞれの接触部を接圧ばね17とピン17aとのピン結合により導体の接触部に荷重を加える構造である。 開閉器ブレード12を支持する相間連結機構18は、開閉器ブレード12を支持する断面が四角形の箱形のブレード支持部18eと、開閉器ブレード12のブレード回転軸を兼ねた嵌合カップリング18abとで構成され、この嵌合カップリング18abは、実施の形態1と同様に開閉器用操作機構7に連結したシール軸16からの駆動力を隣接相へ伝えるためのものでる。
なお、相間連結機構18の開閉器用操作機構7への連結機構は、図8に示すように相間連結機構18の大径無端枠体部18Gの凹形状部18bと係り合う(嵌合する)金属製の連結アダプター14(図9)と開閉器用タンク2(密閉容器)の内外の気密性を確保しながら外部と取り合うシールケース15とシール軸16などにより構成される。
そして、凸形状部18aと凹形状部18bとを互いに嵌合することより嵌合カップリングを形成し、且つ上述したように開閉器ブレード12の回転軸部として機能する。なお、嵌合カップリング18abは、凸形状部18aと凹形状部18bによって接離可能に連結されている。なお、実施の形態2では、凹凸形状は、6分割した事例を示している。
なお、開閉器ブレード12に形成した位置決めピン19用の穴12bは、開閉器ブレード12を貫通していないめくら穴であり、位置決めピン19は、2個の開閉器ブレード12に挟まれる形で所定位置に保持される。なお、12a、12cはピン用の孔である。
なお、相間連結機構18を構成する各部材(18ab、18a、18b、18c、18d、18e、18f)は絶縁物によって構成する。その絶縁の材料としては、熱可塑性樹脂(ポリブチレンテレフタレート[PBT]、ポリエチレン,ポリプロピレンなど)や熱硬化性樹脂(エポキシなど)が使用される。
さらに、相間連結機構18は、凹凸部嵌合部の重なり代L(図7(a))を大きくすることにより、開閉器ブレード12が固定側端子に噛み込む時に発生する負荷トルクが嵌合部に与える荷重と同部の当たる面積を大きくすることで面圧を低減することが可能となる。
また、相間連結機構18の嵌合カップリング18abのガタ分により隣接相への角度ずれが発生し、必ず操作機構に近い側から動作するため、入操作時の固定端子噛み込み時と切操作時の動作開始時の負荷力が高い時に負荷力のピークを分散させることが可能である。
さらに、相間連結機構18の補強リブ18cを片側又は図6C(g)のように左右対称に持つことにより、開閉器ブレードを覆う四角形の箱形のブレード支持部18eの補強機能が得られ、相間連結機構18が耐え得るねじり強度が増す効果が得られる。
また、この発明は、その発明の範囲内において、各実施の形態を適宜、変形、省略することが可能である。
Claims (10)
- 一端に設けた回転軸を支点として回転し他端に形成した接触部を主回路に切離させて主回路の入、切、接地の三位置切り替えを行う開閉器ブレード、
各相毎に分割して構成され、前記開閉器ブレードの前記接触部を外部に突出させた状態で前記開閉器ブレードを包囲して支持するブレード支持部と、互いに嵌合可能な形状に形成され前記ブレード支持部を挟んで前記回転軸の方向の一端と他端に向けてそれぞれ配置された大径無端枠体と小径無端枠体とを有する絶縁物製の相間連結機構と、
を備えた開閉器であって、
前記相間連結機構を前記回転軸に沿って必要な相数分を配置するとともに、
互いに隣接する前記相間連結機構を、対向する前記大径無端枠体と前記小径無端枠体を互いに嵌合させて結合した嵌合カップリングで連結した、
ことを特徴とするガス絶縁スイッチギヤの開閉器。 - 前記ブレード支持部は、箱形でありこの箱内に前記開閉器ブレードを収納し保持するとともに、相間方向の長さを開閉器ブレードの充電部の長さよりも大きくしたことを特徴とする請求項1に記載のガス絶縁スイッチギヤの開閉器。
- 前記大径無端枠体及び前記小径無端枠体の少なくとも一方がカップ状であることを特徴とする請求項1又は請求項2に記載のガス絶縁スイッチギヤの開閉器。
- 前記嵌合カップリングは、互いに隣接する前記相間連結機構間の回転軸部とされていることを特徴とする請求項1から請求項3のいずれか1項に記載のガス絶縁スイッチギヤの開閉器。
- 前記大径無端枠体の内周部及び前記小径無端枠体の外周部は、径方向断面が凹凸形状又は多角形状の絶縁部材でそれぞれ構成されていることを特徴とする請求項1から請求項4のいずれか1項に記載のガス絶縁スイッチギヤの開閉器。
- 前記大径無端枠体及び前記小径無端枠体の凹凸部は、凹部と凸部が同数で構成されていることを特徴とする請求項5に記載のガス絶縁スイッチギヤの開閉器。
- 前記相間連結機構は、前記開閉器ブレードの接圧を加える接圧ばねと、この接圧ばねを保持し且つ前記開閉器ブレードの長手方向の移動を抑制するピンとを有していることを特徴とする請求項1から請求項6のいずれか1項に記載のガス絶縁スイッチギヤの開閉器。
- 前記相間連結機構は、前記開閉器ブレードに設けた位置決めピンと、前記開閉器ブレードの長手方向の移動を抑制する突出部とを有していることを特徴とする請求項1から請求項6のいずれか1項に記載のガス絶縁スイッチギヤの開閉器。
- 前記相間連結機構は、前記開閉器ブレードの相間、対地間の絶縁バリア機能を有していることを特徴とする請求項1から請求項8のいずれか1項に記載のガス絶縁スイッチギヤの開閉器。
- 請求項1から請求項9のいずれか1項に記載のガス絶縁スイッチギヤの開閉器を使用したガス絶縁開閉装置。
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US15/559,499 US10453623B2 (en) | 2014-06-12 | 2015-11-30 | Switch for gas insulated switchgear, and gas insulated switching device |
KR1020177033632A KR101931467B1 (ko) | 2015-06-10 | 2015-11-30 | 가스 절연 스위치 기어의 개폐기 및 가스 절연 개폐 장치 |
JP2016518465A JP5968580B1 (ja) | 2015-06-10 | 2015-11-30 | ガス絶縁スイッチギヤの開閉器およびガス絶縁開閉装置 |
CN201580080563.9A CN107636785B (zh) | 2014-06-12 | 2015-11-30 | 气体绝缘开关装置的断续器和气体绝缘开闭装置 |
EP15895010.5A EP3309808B1 (en) | 2015-06-10 | 2015-11-30 | Switching apparatus for gas insulated switchgear, and gas insulated switching device |
HK18105416.5A HK1245993A1 (zh) | 2014-06-12 | 2018-04-25 | 氣體絕緣開關裝置的斷續器和氣體絕緣開閉裝置 |
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