KR101018342B1 - Vacuum switch gear - Google Patents

Abstract

In the present invention, when the operating force of the manipulator is reduced, the wear powder is prevented from being diffused into the vacuum vessel due to the friction between the metals.

Movable electrodes connected to the movable electrode rods 30, 32, and 34 in the inner vacuum vessels 70, 72, and 74, respectively, in the outer vacuum vessel 10. While accommodating 118, 120, and 122, the fixed electrodes 124, 126, and 128 connected to the fixed electrode rods 60, 62, and 64 are accommodated, and the movable electrode rods 30, 32, and 34 are flexible. A plurality of copper plates 132 having different lengths and a stainless plate 134 are alternately stacked to connect each other via the conductors 130, and the copper plates are formed at the bent portions of the flexible conductors 130. A gap is formed between the 132 and the stainless plate 134 to reduce the friction between the copper plate 132 and the stainless plate 134 to prevent the occurrence of wear.

Description

Vacuum switch gear {VACUUM SWITCH GEAR}

BRIEF DESCRIPTION OF THE DRAWINGS The principal part sectional front view of the vacuum switchgear which shows 1st Embodiment of this invention,

(A) is a front view of a flexible conductor, (b) is an enlarged front view of the principal part of a flexible conductor, (c) is a top view of a flexible conductor,

3 is a sectional front view of an essential part of a vacuum switch gear, according to a second embodiment of the present invention;

(A) is an enlarged view of the principal part of a flexible conductor, (b) is a front view of a flexible conductor, (c) is a top view of a flexible conductor, (d) is a front view of a spacer,

5 is a sectional front view of a main part of a vacuum switch gear, according to a third embodiment of the present invention;

6 (a) is an enlarged view of a main part of the flexible conductor, (b) is a front view of the flexible conductor, (c) is a plan view of the flexible conductor, (d) is a front view of the spacer,

7 is a sectional front view of an essential part of a vacuum switch gear, according to a fourth embodiment of the present invention;

(A) is a front view of a flexible conductor, (b) is sectional drawing along the A-A line shown to (a), (c) is sectional drawing along the B-B line shown to (a),                 

9 is a sectional front view of a main part of a vacuum switch gear, according to a fifth embodiment of the present invention;

10 (a) is a plan view of a trough-shaped shield plate, (b) is a front view, (c) is a side view,

11 is an essential part cross sectional front view of a vacuum switch gear according to the sixth embodiment of the present invention;

12 is a block diagram of a cylindrical bellows,

13 is a sectional front view of an essential part of a vacuum switch gear, according to a seventh embodiment of the present invention;

(A) is a block diagram of a bellows, (b) is an enlarged view of the principal part of a bellows,

15 (a) is a block diagram when the flexible conductor is composed of a single copper plate, (b) is a block diagram when the flexible conductor is composed of two copper plates,

(A) is a block diagram which shows another embodiment of a flexible conductor, (b) is a top view of a copper plate, (c) is a top view of a stainless plate, (d) is a top view of a stainless plate installed in a copper plate, (e) It is sectional drawing of a copper plate and a stainless plate.

※ Explanation of symbols for main parts of drawing

10: outer vacuum container 12: upper plate

14: lower plate 30, 32, 34: movable electrode rod

36, 38, 40: bellows 60, 62, 64: fixed electrode rod

70, 72, 74: inner vacuum container

76, 78, 80, 82, 84, 86: insulating shield                 

88, 90, 92: movable electrode side metal plate

94, 96, 98: metal plate on the fixed electrode side

100, 102, 104: through holes 106, 108, 110: bellows

112, 114, 116: electrode shield 118, 120, 122 movable electrode

124, 126, 128: fixed electrode 130: flexible conductor

132: copper plate 134: stainless steel plate

136, 138, 140: through holes 142, 144, 146 spacer

148: gap 150: spacer

152: bellows of vertical half cutting 154: seal plate of trough shape

155: twisted line 156: cylindrical bellows

158: exhaust holes 160, 166, 168: copper plate

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum switch gear, and more particularly, to a vacuum switch gear having a plurality of switches housed in a vacuum container and suitable for use as a power distribution facility for a power system.

The distribution system of the power system is provided with a switchgear as one element of the water distribution facility. Conventionally, a variety of air insulation systems have been adopted as this type of switchgear. However, in order to reduce the size, a gas insulation system using SF ₆ gas is used as the insulation medium. However, the use of SF ₆ gas as an insulating medium may adversely affect the environment. Recently, a vacuum insulating method using vacuum insulation as an insulating medium has been proposed.

As a vacuum insulated switchgear, for example, a plurality of pairs of main circuit opening and closing parts in which a fixed electrode and a movable electrode are disposed to face each other in a vacuum container are accommodated, and the movable electrode is connected to the bus-side conductor, and the fixed electrode is connected to the load-side conductor. As a result, each main circuit opening and closing portion is covered with an arc shield, and each bus bar side conductor is configured to be connected via a flexible conductor (see Patent Document 1).

According to the switch gear, since the vacuum insulation method is adopted, the insulation distance can be made shorter than that of the gas insulation method, and the switch gear can be made compact.

[Patent Document 1]

Japanese Patent Laid-Open No. 2000-268685 (pages 3 to 6, FIGS. 1 to 3)

In the above prior art, since each bus bar side conductor is connected via a flexible conductor (flexible conductor), and since the flexible conductor is comprised of a single board | plate material, it is difficult to reduce the operation force of the manipulator for operating a movable electrode. Do.

Therefore, in order to reduce the operating force of a manipulator, it is tried to comprise a flexible conductor using a some electroconductive board material or a some electrically conductive wire twisted line. However, in the case where the flexible conductor is constituted by using a plurality of conductive plates or a plurality of twisted pairs of conductor wires, wear powder may be generated due to friction between metals when the flexible conductor is deformed in response to the operating force from the manipulator.

An object of the present invention is to prevent abrasion from spreading into a vacuum container due to friction between metals when reducing the operating force of the manipulator.

In order to solve the above problems, the present invention provides an outer vacuum vessel, which is the object of grounding, a plurality of inner vacuum vessels housed in the outer vacuum vessel, a movable electrode held on the movable electrode rod and a fixed electrode rod. A plurality of switchgear and the fixed electrode is disposed to be respectively distributed in the plurality of inner vacuum containers facing each other, and a flexible conductor (flexible conductor) for connecting the movable electrode rods of the plurality of switchgear to each other, the flexible conductor And a plurality of conductive plate materials having different lengths, and the plurality of conductive plate materials constitute a vacuum switch gear which is stacked apart from each other.

When constituting the vacuum switch gear, a plurality of conductive twisted lines may be used instead of the plurality of conductive plate members. In the case where the flexible conductor is composed of a plurality of conductive plates, a plurality of conductive plates are different in length if a configuration is provided in which a spacer is inserted between the conductive plates in the connecting portion connecting the conductive plates and the movable electrode rod. Alternatively, even when the same length is used, the spacers can be laminated with the spacers spaced apart from each other.

Moreover, when comprised with several electroconductive twisted line | wire, the structure which mounts the cylindrical bellow which covers the area | region between each movable electrode rod in the state sealed around among a some electroconductive twisted line | wire can be employ | adopted. In this case, an exhaust hole may be formed in the bellows, or the degree of vacuum in the bellows may be set lower than that in the outer vacuum vessel.

In the case where the flexible conductor is formed by stacking a plurality of conductive plate members, instead of the cylindrical bellows, instead of the cylindrical bellows, an area under the connection portion between the plurality of conductive plate members and the movable electrode rod is covered. A bell-shaped bellows of a vertical cross section may be used, or a groove-shaped shield plate covering a region on the lower side of the region excluding the middle portion between the movable electrode rods among the plurality of conductive plates may be used.

According to the above means, even if the flexible conductor is deformed in response to the operating force from the manipulator, a gap is formed between the conductive wire plates, so that the friction between the metals can be reduced to prevent the wear particles from scattering into the vacuum vessel. . In addition, by attaching a bellows or a shield plate to the flexible conductor, it is possible to prevent foreign matters such as the wear powder from spreading into the vacuum container even when wear powder is generated from the flexible conductor.

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described based on drawing. BRIEF DESCRIPTION OF THE DRAWINGS The principal part cross section front view which shows one Embodiment of the vacuum switch gear which concerns on this invention. In FIG. 1, the vacuum switch gear is comprised with the stainless outer vacuum container 10 as one element of the water distribution installation in a distribution system. The outer vacuum vessel 10 includes an upper plate 12, a lower plate 14, and a side plate 16, and the periphery (edge) of each plate is joined to each other by welding, and at the same time, Grounded together.

Through-holes 18, 20, and 22 are formed in the upper plate 12, and annular bases 24, 26, and 28 are formed at the edges of the through-holes 18, 20, and 22, respectively. , 20, 22) so as to cover it. In the circular space portion formed in the center of each base 24, 26, 28, cylindrical movable electrode rods 30, 32, 34 are inserted freely in a reciprocating motion (up and down movement). That is, each of the through holes 18, 20, 22 is closed by the bases 24, 26, 28 and the movable electrode rods 30, 32, 34.

An axial end (upper side) of the movable electrode rods 30, 32, 34 is connected to a manipulator (electronic manipulator) which is provided outside of the outer vacuum vessel 10. On the lower side of the upper plate 12, the bellows 36, 38, 40 are arranged freely in a reciprocating motion (up and down) along the edges of the through holes 18, 20, 22, and the bellows 36, 38 and 40 have one end in the axial direction fixed to the lower side of the upper plate 12, and the other end in the axial direction is attached to the outer circumferential surface of each of the movable electrode rods 30, 32 and 34. That is, in order to seal the outer vacuum container 10, the bellows 36 is formed along the axial direction of each movable electrode rod 30, 32, 34 at the edge of each through hole 18, 20, 22. 38 and 40 are arranged. In addition, an exhaust pipe (not shown) is connected to the upper plate 12, and the outside vacuum vessel 10 is evacuated through the exhaust pipe.

On the other hand, the lower plate 14 is provided with through holes 42, 44, and 46, and insulating bushings 48, 50, and 52 are provided at the edges of the through holes 42, 44, and 46, respectively. , 44, 46, so that it is fixed. On the bottom side of each bushing 48, 50, 52, an annular insulating base 54, 56, 58 is fixed. In addition, cylindrical fixed electrode rods 60, 62, and 64 are inserted into the circular space portion in the center of each base 54, 56, 58. That is, the through holes 42, 44, 46 formed in the lower plate 14 are closed by the bushings 48, 50, 52, the bases 54, 56, 58, and the fixed electrode rods 60, 62, 64, respectively. It is. At one end of the fixed electrode rods 60, 62, 64 in the axial direction, the fixed electrode rods 60, 62, 64 are connected to a cable (distribution line) disposed outside the outer vacuum vessel 10.

Inside the outer vacuum vessel 10, the inner vacuum vessels 70, 72, 74 serving as the main body of the breaker constituting the switchgear are accommodated, and each of the inner vacuum vessels 70, 72, 74 is a breaker as a switch. Is distributed and stored.

The inner vacuum containers 70, 72, and 74 are formed of ceramic insulating shields 76, 78, 80, 82, 84, 86 formed in a cylindrical shape, and a movable electrode side metal plate 88 made of stainless steel, formed in an approximately air shape. , 90, 92 and stainless steel fixed electrode side metal plates 94, 96, 98 formed in a substantially disk shape. In addition, the bellows 106, 108, and 110 and the electrode shields 112, 114, and 116 are accommodated in the inner vacuum containers 70, 72, and 74, and the movable electrodes 118, 120, and 122 are fixed. The electrodes 124, 126, and 128 are accommodated.

The bellows 106, 108, 110 are disposed along the axial direction of the movable electrode rods 30, 32, 34 so that one end of the axial direction is fixed to the bottom side of the metal plates 88, 90, 92, and the other One end is mounted on the outer circumferential surface of the movable electrode rods 30, 32, 34. The electrode shields 112, 114 and 116 are formed in a substantially cylindrical shape using stainless and are disposed to cover the periphery of each of the movable electrodes 118, 120 and 122 and the fixed electrodes 124, 126 and 128, The outer circumferential side of the middle portion of the insulating shield 76 and the insulating shield 78, the insulating shield 80 and the insulating shield 82, the insulating shield 84 and the insulating shield 86 respectively. Supported by That is, the electrode shields 112, 114, and 116 have metal vapor generated from the movable electrodes 118, 120, and 122 and the fixed electrodes 124, 126, and 128 when the current is interrupted. It is arrange | positioned so that scattering to the exterior of 74) may be prevented. The movable electrodes 118, 120, 122 are fixed to the axial ends of the movable electrode rods 30, 32, 34, respectively, and the fixed electrodes 124, 126, 128 are fixed electrode rods 60, 62, respectively. 64).

Each movable electrode rod 30, 32, 34 is connected to each other via a flexible conductor (flexible conductor) 130 having two curved portions. As shown in FIG. 2, the flexible conductor 130 is formed by alternately stacking a plurality of copper plates 132 and stainless plates 134 as conductive plate materials having two curved portions in the axial direction. Through holes 136, 138, and 140 are formed in the copper plate 132 and the stainless plate 134, respectively, and the movable electrode rod 30 is inserted into the through hole 136, and the movable electrode rod is inserted into the through hole 138. 32 is inserted, and a movable electrode rod 34 is inserted into the through hole 130. The periphery of each of the through holes 136, 138, 140 is connected to the movable electrode rods 30, 32, 34 as a connection portion with the movable electrode rods 30, 32, 34. In this case, each copper plate 132 and each stainless plate 134 are formed so that a length may differ for every sheet in order of lamination. That is, each copper plate 132 and each stainless plate 134 are formed in axial length shorter by ΔL = 0.3 in the stacking order. Therefore, between the through hole 136 and the through hole 138 (between the movable electrode rod 30 and the movable electrode rod 32) and the through hole 138 of each copper plate 132 and each stainless plate 134. ) Between the through hole 140 (between the movable electrode rod 32 and the movable electrode rod 34), each of the copper plates 132 and each of the stainless plates 134 is formed while a curved portion having a larger internal diameter is formed. A gap is formed between the plurality of copper plates, so that each copper plate 132 and each stainless plate 134 are stacked to be spaced apart from each other.

According to this embodiment, the flexible conductor 130 which has two curved parts in an axial direction is comprised using the copper plate 132 and stainless plate 134 which differ in length, and each copper plate 132 and each stainless plate ( Since the 134 are stacked apart from each other, the operating force of the manipulator can be reduced, and when the flexible conductor 130 is deformed in response to the manipulating force from the manipulator, each copper plate 132 and each stainless plate 134 ), Friction between metals (frictions between metals) can be reduced to prevent the occurrence of wear from each copper plate 132 and each stainless plate 134, and at the same time, Can be prevented. In addition, it is possible to prevent the occurrence of ground faults due to wear, which can contribute to the improvement of reliability.

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4. In this embodiment, the flexible conductor 130 having two curved portions in the axial direction is formed by laminating a plurality of copper plates 132 having different lengths, and the through holes 136, 138, The spacers 142, 144, and 146 made of stainless steel are mounted around the 140, and the spacers 142, 144, and 146 are inserted between the copper plates 132, and the copper plates 132 and each of the copper plates 132 are formed. Each copper plate 132 is stacked so that a gap 148 is formed between the copper plates 132 in the region excluding the connection with the movable electrode rods 30, 32, and 34. The other configuration is the same as that of FIG. 1. Do.

According to the present embodiment, the flexible conductor 130 having two curved portions in the axial direction is formed by using a plurality of copper plates 132 having different lengths, and the copper plates 132 are stacked to be spaced apart from each other. As a result, the operating force of the manipulator can be reduced, and at the same time, the friction (friction between metals) between each copper plate 132 is reduced when each flexible conductor 130 is deformed in response to the maneuvering force from the manipulator. Abrasion can be prevented from occurring, and at the same time, the abrasion can be prevented from scattering into the outer vacuum container 10. In addition, it is possible to prevent the occurrence of ground faults due to the wear powder can contribute to the improvement of reliability.

Next, a third embodiment of the present invention will be described with reference to FIGS. 5 and 6. In the present embodiment, a plurality of flexible conductors 130 having two curved portions in the axial direction are formed by laminating a plurality of copper plates 132 of the same length, and the through holes 136, 138, 140 of each copper plate 132 are formed. In the region in which the ring-shaped spacer 150 formed of stainless steel is inserted around the copper plate 132 and the connection portion between the copper plate 132 and the movable electrode rods 30, 32, and 34 is excluded from the copper plate 132, The gap 148 is formed between each copper plate 132, and the other structure is the same as that of FIG.

According to the present embodiment, the flexible conductors 130 having two curved portions in the axial direction are formed by using a plurality of copper plates 132 having different lengths, and the copper plates 132 are stacked to be spaced apart from each other. As a result, the operating force of the manipulator can be reduced, and at the same time, the friction (friction between metals) between each copper plate 132 is reduced when each flexible conductor 130 is deformed in response to the maneuvering force from the manipulator. Abrasion can be prevented from occurring, and at the same time, the abrasion can be prevented from scattering into the outer vacuum container 10. In addition, it is possible to prevent the occurrence of ground faults due to wear, which can contribute to the improvement of reliability.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. 7 and 8. In this embodiment, the flexible conductor 130 having two curved portions in the axial direction is formed by laminating a plurality of copper plates 132 and stainless plates 134. Among these conductive plates, a conductive plate member and each movable electrode rod 30 are formed. , Except for the region of the connection portion with the points 32 and 34, and the vertically half-shaped bellows 152 covering the region on the lower side of the middle region between each movable electrode rod (between each through hole) And the other configuration is the same as that of FIG. It is also possible to use a cylindrical bellows instead of the vertically half-shaped bellows 152 made of stainless steel.

According to the present embodiment, the flexible conductor 130 having two curved portions in the axial direction is formed by using a plurality of copper plates 132 and stainless plates 134 having different lengths, and each copper plate 132 and each Since the stainless plates 134 were spaced apart from each other, and the flexible conductors 130 were covered with the bellows 152 of the half-shape vertically, the area between the lower portions of the middle portions between the movable electrode rods was vertically covered. In addition, the operating force of the flexible conductor 130 can be reduced and the friction (friction between metals) between each copper plate 132 and each stainless plate 134 is reduced when the flexible conductor 130 is deformed in response to the operating force from the manipulator. The wear powder can be prevented from being generated from the copper plate 132 and the respective stainless plates 134, and at the same time, the wear powder can be prevented from scattering into the outer vacuum container 10. In addition, it is possible to prevent the occurrence of ground faults due to wear, which can contribute to the improvement of reliability.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. 9 and 10. In this embodiment, the flexible conductor 130 having two curved portions in the axial direction is formed by stacking a plurality of copper plates 132 and stainless plates 134, and among the copper plates 132 or the stainless plates 134. A groove-shaped shield plate 154 covering the lower region of the region excluding the middle portion between the movable electrode rods is mounted on the flexible conductor 130, and the other configuration is the same as that of FIG.

The shield plate 154 is made of stainless steel, and one shield plate 154 is mounted around the through holes 136 and 140 of the copper plate 132 and the stainless plate 134, and the through hole ( Around the 138, the shield plates 154 are arranged in two reverse directions.

According to this embodiment, the flexible conductor 130 which has two curved parts in the axial direction is comprised using several copper plate 132 and stainless plate 134 which differ in length, and each copper plate 132 is carried out. And the stainless plates 134 are spaced apart from each other, and the lower side region of the flexible conductor 130 excluding the middle portion between the movable electrode rods is covered with the groove-shaped shield plate 154. In addition, the operating force of the manipulator can be reduced, and friction (friction between metals) between each copper plate 132 or each stainless plate 134 when the flexible conductor 130 is deformed in response to the maneuvering force from the manipulator. In other words, it is possible to prevent wear from being generated from each copper plate 132 or each stainless plate 134, and at the same time, it is possible to prevent the wear from scattering into the outer vacuum vessel 10. In addition, it is possible to prevent the occurrence of ground faults due to wear, which can contribute to the improvement of reliability.

Next, a sixth embodiment of the present invention will be described with reference to FIGS. 11 and 12. In the present embodiment, the flexible conductor 130 is constituted using a twisted line 155 formed by twisting a plurality of copper wires together, and at the same time, an intermediate portion between the movable electrode rods (between each through hole) among the twisted wires 155 is provided. The cylindrical bellows 156 covering the region in a sealed state is fixed to the two flexible conductors 130 by soldering, and the other configuration is the same as that in FIG.

In the flexible conductor 130 according to the present embodiment, the twisted wire 155 which is subjected to the surface treatment including plating may be adopted in the twisted wire 155 formed by twisting a plurality of copper wires together. More specifically, chromium plating may be used. In order to secure adhesion between chromium plating and copper twisted pair, first, nickel plating may be applied to twisted pair 155, followed by chromium plating. The role of the plating is to prevent adhesion during operation under vacuum in the untreated copper twisted pair, and the surface treatment of the twisted pair 155 can be optimized by the operating conditions of the flexible conductor 130.

The twisted line 155 has through holes (through holes 136, 138, 140 having the same role as the copper plate 132) at the ends for connecting to the movable electrode rods 30 to 34. As shown in FIG. More specifically, it is preferable that the end of the twisted line 155 is mechanically or metallicly coupled to the terminal plate having a through hole by using a terminal plate having a through hole. In this case, the soldering material for metal bonding with the twisted line 155 surface-treated by plating or the like, and furthermore, the contact resistance can be reduced by heating and integrating three members of the terminal plate having a through hole, which is most suitable. . As the heating means, a means capable of coupling in a short time such as resistance heating, laser, electron beam, arc or the like is preferable. This is effective for preventing the brazing material from being widened at the end of the twisted line 155 by capillary action and restricting the movement of the flexible conductor 130 to increase the movable stress.

The vacuum pressure (degree of vacuum) in the bellows 156 in the present embodiment is set to a lower vacuum than that in the outer vacuum vessel 10. For example, when the vacuum pressure in the outer vacuum vessel 10 is 10 ^-7 to 10 ^-6 Torr, the vacuum pressure in each bellows 156 is set to 10 ^-1 to 10 ^-5 Torr.

When the vacuum pressure in each bellows 156 is set to a lower vacuum than the vacuum pressure in the outer vacuum vessel 10, the twisted line 155 in the bellows 156 among the twisted lines 155 can be prevented from adhering to each other. have. In addition, by making the vacuum pressure inside the bellows 156 low, it is possible to reduce the influence on the vacuum pressure in the outer vacuum vessel 10 even when the bellows 156 is torn.

According to the present embodiment, the flexible conductor 130 is formed by using the twisted wire 155 having a wire diameter φ 0.12 (the wire diameter is 0.12 mm) or less, and each movable electrode rod of the twisted wire 155. Since the area of the intermediate portion was covered with the bellows 156 in a sealed state, the operating force of the manipulator can be reduced than that of the above embodiments, and the flexible conductor 130 in response to the operating force from the manipulator. When () is deformed, even if abrasion is generated from the twisted line 155, it is possible to prevent the abrasion from scattering into the outer vacuum container 10. In addition, it is possible to prevent the occurrence of ground faults due to wear, which can contribute to the improvement of reliability.

Next, a seventh embodiment of the present invention will be described with reference to FIGS. 13 and 14. In the present embodiment, the exhaust hole 158 is formed at one end in the axial direction of the bellows 156, and the bellows is fixed when both ends in the axial direction of the bellows 156 are fixed to the twisted line 155 by soldering. The inside of 156 is exhausted through the exhaust hole 158, and the other structure is the same as that of FIG.

According to this embodiment, the flexible conductor 130 is constituted using the twisted line 155, and the area | region of the intermediate part between each movable electrode rod (between each through-hole) among the twisted lines 155 is bellow | 156), the operating force of the manipulator can be reduced compared to that of the above embodiments, and the twisted line 155 can be used when the flexible conductor 130 is deformed in response to the operating force from the manipulator. Even if abrasion is generated, it is possible to prevent the abrasion from scattering into the outer vacuum container 10. In addition, it is possible to prevent the occurrence of ground faults due to wear, which can contribute to the improvement of reliability.

Moreover, as the flexible conductor 130 in each said embodiment, as shown to FIG. 15 (a), it consists of the single copper plate 160 which has three curved parts in an axial direction, and the axis | shaft of the copper plate 160 is shown. The structure which connects both ends of a direction to the connecting plate 162 and 164 which has a through hole can also be employ | adopted. In this case, stress is set to 5-7 kgf or less so that the copper plate 160 may be annealed and the copper plate 160 will not be hardened.

In addition, instead of the copper plate 160, as shown in FIG. 15B, the copper plates 166 and 168 having five curved portions in the axial direction are connected to the connecting plates 162 and 164 in a state of facing each other. May be employed. While annealing each copper plate 166 and 168, the stress is set to 5-7 kgf or less.

Moreover, when constructing the flexible conductor 130, as shown in FIG. 16, using the copper plate 132 and stainless plate 134 which differ in length, the stainless plate 134 so that the adhesion prevention stainless plate 134 may be located only in a sliding part. ), The length of the C) is shorter than that of the copper plate 132, the copper plate 132 and the stainless plate 134 are alternately stacked, and the stainless plate 134 is fixed to the copper plate 132 by spot welding, and the copper plate among the laminated sheets It is possible to employ a configuration of caulking both ends of 132 and heating in vacuum. In this case, the bonding force can be further increased by solid phase diffusion bonding between the copper plates 132. As shown in FIG. 16E, the copper plates 132 and the stainless plates 134 are alternately laminated using the same length as the copper plates 132 and the stainless plates 134, and the stacked angles are also laminated. By constructing the cross section of the plate so that its outer circumferential side has a substantially circular shape as a whole, it becomes possible to accommodate the plurality of copper plates 132 and the stainless plates 134 in the bellows 156 having a small diameter.

As described above, according to the present invention, it is possible to prevent foreign matters such as wear powders from being diffused into the vacuum container.

Claims (12)

The outer vacuum vessel to be grounded, A plurality of inner vacuum containers housed in the outer vacuum container, A plurality of switchgear arranged in which the movable electrode held by the movable electrode rod and the fixed electrode held by the fixed electrode rod are respectively distributed in the plurality of inner vacuum containers so as to face each other; A flexible conductor connecting the movable electrode rods of the plurality of switches to each other; The said flexible conductor is comprised by laminating a some electroconductive board material, The plurality of conductive plate members are provided with a cylindrical bellows covering a region between the movable electrode rods in a sealed state among the plurality of conductive plate members. And the exhaust hole is formed in the bellows. The outer vacuum vessel to be grounded, A plurality of inner vacuum containers housed in the outer vacuum container, A plurality of switchgear arranged in which the movable electrode held by the movable electrode rod and the fixed electrode held by the fixed electrode rod are respectively distributed in the plurality of inner vacuum containers so as to face each other; A flexible conductor connecting the movable electrode rods of the plurality of switches to each other; The flexible conductor is composed of a plurality of conductive twisted lines, The plurality of conductive twisted lines are provided with cylindrical bellows covering a region between the movable electrode rods in a sealed state among the plurality of conductive twisted lines, And the exhaust hole is formed in the bellows. The method of claim 1, The flexible conductor is composed of a plurality of conductive plate materials of different lengths, The plurality of conductive plate material is laminated with spaced apart from each other vacuum switchgear, characterized in that. The method of claim 1, The flexible conductor is composed of a plurality of conductive plate materials having different lengths, and a plurality of spacers inserted between the respective conductive plate materials at a connection portion connecting the plurality of conductive plate materials and the movable electrode rods, The plurality of conductive plate materials are laminated to be spaced apart from each other with the spacers therebetween. The method of claim 1, The flexible conductor is composed of a plurality of conductive plate members having the same length, and a plurality of spacers inserted between the conductive plate members at a connection portion between the plurality of conductive plate members and the movable electrode rods, The plurality of conductive plate materials are laminated to be spaced apart from each other with the spacers therebetween. The method of claim 1, The plurality of conductive plate materials are provided with a groove-shaped shield plate covering a region on the lower side of a region excluding the intermediate portion between the movable electrode rods among the plurality of conductive plate materials. . The outer vacuum vessel to be grounded, A plurality of inner vacuum containers housed in the outer vacuum container, A plurality of switchgear arranged in which the movable electrode held by the movable electrode rod and the fixed electrode held by the fixed electrode rod are respectively distributed in the plurality of inner vacuum containers so as to face each other; A flexible conductor connecting the movable electrode rods of the plurality of switches to each other; The said flexible conductor is comprised by laminating a some electroconductive board material, The plurality of conductive plate members are provided with a cylindrical bellows covering a region between the movable electrode rods in a sealed state among the plurality of conductive plate members. The said flexible conductor is comprised by alternately laminating | stacking the conductive plates which are the same length, and differ in material, and the cross section of each laminated conductive plate is formed in circular shape as the whole outer peripheral side, The vacuum switch gear characterized by the above-mentioned. . The outer vacuum vessel to be grounded, A plurality of inner vacuum containers housed in the outer vacuum container, A plurality of switchgear arranged in which the movable electrode held by the movable electrode rod and the fixed electrode held by the fixed electrode rod are respectively distributed in the plurality of inner vacuum containers so as to face each other; A flexible conductor connecting the movable electrode rods of the plurality of switches to each other; The flexible conductor is composed of a plurality of conductive twisted lines, The plurality of conductive twisted lines are provided with cylindrical bellows covering a region between the movable electrode rods in a sealed state among the plurality of conductive twisted lines, The cross section of the said flexible conductor is a vacuum switch gear characterized by the outer peripheral side formed in circular shape as a whole. The method according to claim 1 or 2, And the degree of vacuum in the bellows is set lower than the degree of vacuum in the outer vacuum vessel. 3. The method of claim 2, The plurality of conductive twisted lines are constituted by using a wire having a diameter of an element wire of 0.12 mm or less. The outer vacuum vessel to be grounded, A plurality of inner vacuum containers housed in the outer vacuum container, A plurality of switchgear arranged in which the movable electrode held by the movable electrode rod and the fixed electrode held by the fixed electrode rod are respectively distributed in the plurality of inner vacuum containers so as to face each other; A flexible conductor connecting the movable electrode rods of the plurality of switches to each other; The said flexible conductor is comprised by laminating a some electroconductive board material, The plurality of conductive plate materials are provided with a vertically half-shaped bellows covering a region of the lower side of the middle portion between the movable electrode rods among the plurality of conductive plate materials. The outer vacuum vessel to be grounded, A plurality of inner vacuum containers housed in the outer vacuum container, A plurality of switchgear arranged in which the movable electrode held by the movable electrode rod and the fixed electrode held by the fixed electrode rod are respectively distributed in the plurality of inner vacuum containers so as to face each other; A flexible conductor connecting the movable electrode rods of the plurality of switches to each other; The said flexible conductor is comprised by laminating a some electroconductive board material, The plurality of conductive plate members are provided with a cylindrical bellows covering a region between the movable electrode rods in a sealed state among the plurality of conductive plate members. An exhaust hole is formed in the bellows, The plurality of conductive plate materials are provided with a groove-shaped shield plate covering a region on the lower side of a region excluding the intermediate portion between the movable electrode rods among the plurality of conductive plate materials. .

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