JP2005259543A - Switch gear and manufacturing method of switch gear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch gear capable of improving reliability with a simple structure. <P>SOLUTION: This switch gear is provided with: a circuit-switching vacuum bulb unit 120 composed by housing a circuit switching part 4 comprising a fixed electrode 4a and a moving electrode 4b; a vacuum insulation rod unit 130 having an insulation rod member installed in vacuum for driving the moving electrode 4a of the circuit switching part 4 by the insulation rod member to carry out a switching operation of the circuit switching part 4; an airtight vessel 150 disposed between the circuit-switching vacuum bulb unit 120 and the vacuum insulation rod unit 130; and a flexible conductor member 15 housed in the airtight vessel 150, having one end electrically connected to the moving electrode 4b of the circuit switching part 4, and the other end electrically connected to an external connection terminal 46. The circumferences of the circuit-switching vacuum bulb unit 120, the vacuum insulation rod unit 130 and the airtight vessel 150 are integrally molded with a molding member along with the external connection terminal 46. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a switchgear and a method for manufacturing the switchgear, and more particularly to a composite insulating switchgear that uses both vacuum insulation and solid mold insulation, and a method for manufacturing the composite insulating switchgear.

In the prior art, an insulating rod that contacts and separates from the power supply side conductor and the load side conductor are arranged in the vacuum vessel, and the load side conductor and the insulating rod are connected by a flexible conductor formed of a laminate of metal foil, The periphery of the flexible conductor is hermetically fixed with a flexible cover, and oxygen or nitrogen is sealed inside the cover. In addition, a conductive cover is connected to the other end of the connection conductor connected to the insulating rod and a flexible conductor is connected to the inside, and the flexible conductor is provided outside the vacuum vessel (see, for example, Patent Document 1).
In addition, a flexible conductor in which a thin plate member having a thin film having high temperature stability is disposed between a plurality of conductive thin plate members and integrated as necessary, and the rigidity in the vicinity of the central portion is smaller than that of other portions. Therefore, the stress at the fixing point or the fixing point of the flexible conductor is reduced, thereby extending the life of the flexible conductor. The flexible conductor in the switchgear connects the movable blade and the conductor in a grounded vacuum vessel (see, for example, Patent Document 2).

JP 2000-40448 A JP 2001-351438 A

The switchgear in the prior art having the above-described configuration is a problem in which the metal foils laminated with the flexible conductors adhere to each other under vacuum and high temperature conditions in the manufacturing process (brazing joint) and lose flexibility. This is a countermeasure. In the method of providing a flexible cover around the flexible conductor and filling the inside with oxygen or nitrogen, the structure for ensuring airtightness for maintaining the gas inside under vacuum and high temperature is complicated, and the manufacturing process is also complicated. In addition to being complicated, there is a problem that reliability is lowered in terms of maintaining a vacuum by arranging a gas-filled one in a vacuum.
In addition, the structure in which the flexible conductor is disposed outside the vacuum vessel electrically isolates the periphery of the flexible conductor in the air, and thus has a problem of limiting the miniaturization of the switch gear. In addition, when a thin plate member having a high temperature stable thin film and a conductive thin plate member are alternately laminated to add an anti-adhesion function to the flexible conductor, the thin plate member having a high temperature stable thin film is added. There is a problem that the thin plate member and the conductive thin plate member having a high-temperature stable thin film to be manufactured and brazed in vacuum must be degreased and laminated alternately, resulting in an expensive problem. Since it is arranged in the container, the flexible conductor becomes larger and the vacuum container itself becomes larger as the load current increases, so that not only the material cost but also the larger size leads to a significant increase in manufacturing cost. There was a problem.

  The present invention has been made to solve such a problem, and has a simple structure by accommodating a flexible conductor member in an airtight container unitized together with a circuit opening / closing vacuum valve unit and a vacuum insulating rod unit. An object of the present invention is to provide a switchgear that can improve reliability.

  In the switchgear according to the present invention, an airtight container disposed between the circuit open / close vacuum valve unit and the vacuum insulating rod unit, and one end thereof is electrically connected to the movable electrode of the circuit open / close section. A flexible conductor member is connected and the other end is electrically connected to the connection terminal.

  According to the present invention, by providing a flexible conductor member in an airtight container unitized with a circuit opening / closing vacuum valve unit and a vacuum insulating rod unit, a switchgear that can improve reliability with a simple configuration is provided. Can do.

Embodiment 1 FIG.
A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a longitudinal sectional view showing the configuration of the first embodiment.

  In FIG. 1, a main circuit opening / closing vacuum valve 120 has a main circuit opening / closing portion 4 and is composed of a fixed electrode 4a and a movable electrode 4b. The fixed electrode 4a is fixed to the tip of the fixed electrode rod 5, and the other is hermetically penetrating the sealing member 30 and fixed. The sealing member 30 is joined to the end surface of the insulating cylinder 2. The movable electrode 4 b is fixed to the tip of the movable electrode bar 6, and the movable electrode bar 6 is fixed to the sealing member 90 via the bellows 34. The sealing member 90 is joined to the end surface of the insulating cylinder 2. An arc shield 50 is disposed around the main circuit opening / closing portion 4 to suppress the diffusion of particles due to the arc at the time of current opening / closing and to prevent the inner surface of the insulating cylinder 2 from being contaminated. The projection is engaged and fixed. With the bellows 34, the fixed electrode 4a and the movable electrode 4b of the main circuit opening / closing part 4 are brought into and out of contact with each other while maintaining the vacuum inside the insulating cylinder 2.

  The vacuum insulating rod unit 130 has an insulator 7, and an operation rod 33 is connected to one end face. The operation rod 33 is fixed to the sealing member 31 via the bellows 32, and the sealing member 31 is joined to the end surface of the insulating cylinder 3. The connecting rod 8 is connected to the other end surface of the insulator 7 and is fixed to the sealing member 91 via the bellows 35. The sealing member 91 is joined to the end surface of the insulating cylinder 3. The operating rod 33 is moved up and down by the operating device 70 and the connected insulator 7 and connecting rod 8 are both moved up and down. However, the bellows 32 and 34 can be operated while maintaining the vacuum inside the insulating cylinder 3. It has become.

  One end of the flexible conductor 15 is sandwiched between the movable electrode rod 6 and the connecting rod 8 and fixed. The other end is connected to the external conductor 46. An airtight container 150 that is bonded to the sealing members 90 and 91 and the outer conductor 46 and is airtight inside is disposed. Since the outer conductor 46 is airtightly penetrating the airtight container 150 and only the sealing members 90 and 91 are joined, the movable electrode bar 6 and the connecting bar 8 can freely move up and down. The inside of the airtight container 150 is in a state in which the gas 200 is sealed, and the gas 200 is any one of air, nitrogen, oxygen, carbon dioxide, and dry air. The joining method is performed by an adhesive, preferably a conductive adhesive, soldering, brazing, welding or the like.

  Here, in FIG. 1, the connection is made with a structure in which the flexible conductor 15 is sandwiched. Naturally, the flexible conductor 15 is fastened to the end surface of the movable electrode rod 6 with a bolt or the like, and then connected to the connection rod 8. Alternatively, the flexible conductor 15 may be fixed to the split terminal, and the split terminal may be connected to the movable electrode rod 6. Since the connecting rod 8 is not related to current conduction, a material other than copper, such as stainless steel, may be used, and the operation rod 33 is also the same. However, in order to alleviate the stress caused by the difference in coefficient of thermal expansion at the joint with the insulator 7, the metal at the joint is copper and has an outer diameter that is 90% or less of the joint area of the insulator. . Therefore, the connecting rod 8 and the operating rod 33 may be configured by joining copper and stainless steel.

  In general, alumina ceramics are often used for the insulating cylinders 2 and 3 and the insulator 7 as an insulator that can withstand the vacuum and high-temperature conditions during brazing and joining. For example, the sealing members 30, 31, 90, 91 are iron / nickel alloys, iron / nickel / cobalt alloys, which have a thermal expansion coefficient close to that of alumina ceramics, and have low corrosion resistance and low thermal stress due to deformation. A copper / nickel alloy that can be produced, or a stainless steel that can be deformed and relaxed by using a thin wall is used as an inexpensive material that has relatively good corrosion resistance and is inexpensive.

The external conductor 45 is connected to the above-described assembly, and is integrally molded with an insulating resin integrally with a current sensor, a voltage sensor, etc. (not shown). For example, the integral mold 20 is made of epoxy resin by vacuum casting.
The surface of the mold 20 is subjected to a conductive treatment 21 and is at a ground potential. The conductive treatment range is the entire surface excluding the necessary range of interface insulation with the cable heads of the bushing structures 25 and 26, and when the sensors are embedded, excluding the terminal portions. However, the operating device 70 and the operating rod 33 are at ground potential, the upper portion from the upper end surface of the insulating cylinder 3 shown in the figure is at the ground potential, and the periphery of the upper surface of the mold 20 is not touched by the operating device 70. It is not necessary to conduct the conductive treatment above the end face. The conductive treatment 21 is performed by metal spraying such as zinc or aluminum or application of a conductive paint.

By separately manufacturing the main circuit opening / closing valve 120 and the vacuum insulating rod unit 130, the manufacturing process can be simplified, no complicated brazing jig is required, the assembly time is shortened, and the vacuum brazing furnace 1 The amount entering the batch increases, and the manufacturing cost can be reduced. The reason why the cost per batch of the vacuum brazing furnace is considerably high is that the purchase price of the furnace is high, so that the depreciation cost is high and the power consumption is also large. Therefore, the cost can be reduced by separately joining the airtight container.
For example, when the rated current is increased, it is unitized, so it is necessary to change the vacuum valve for opening and closing the main circuit, the flexible conductor, the external conductor, and the airtight container, but the same vacuum insulating rod unit is used. It will be possible. In other words, since standardization can be performed, the types of parts can be reduced, and cost reduction can be realized.

  Since the gas 200 is sealed in the airtight container 150, the flexible conductor 15 is inexpensive because a copper foil laminated type shunt or net shunt generally used for a circuit breaker or a gas switch can be used. . Further, the airtight container 15 may be airtight so that the internal gas does not leak to the outside by vacuum casting, molding, or pressurized gel, and therefore is less expensive than a vacuum container that requires vacuum airtightness. Since the airtight container 150 is made of metal and has the same potential as that of the flexible conductor 15, the airtight container 150 may be a space that does not come into contact with the airtight container 150. Therefore, the airtight container 150 can be downsized.

Since the insulator 7 for preventing current flow is disposed in a vacuum having excellent electrical insulation, the insulator 7 itself can be miniaturized and can be miniaturized as a composite insulated switchgear. Since the operating rod 33 is electrically insulated from the energizing portion by the insulator 7, and the operating rod 33, bellows 32, and sealing member 31 can be set to the ground potential, the end of the movable mold 20 is sealed. It becomes the attachment member 31, and it is not necessary to form a barrier or the like with the mold 20 up to the periphery of the movable part (operation rod 33), and the shape of the mold 20 can be simplified.
Connection with the operating device 70 that opens and closes the main circuit opening / closing unit 4 can be directly connected without using an insulator because the operating rod 33 can be set to the ground potential, and simplification can be achieved. In addition, since there is no exposed charging part, there is no need to provide insulation distance between the phases, between circuits, and the panel, so the panel can be miniaturized and the switchgear is highly reliable and is not affected by the external environment such as salt damage or condensation. Can provide.

  In Embodiment 1 according to the present invention, a pair of electrodes that are main circuit opening and closing portions are arranged in an insulating cylinder, and a fixed electrode rod having a fixed electrode fixed to the tip is fixed to the end surface of the insulating cylinder via a sealing member, A movable electrode with a movable electrode fixed at the tip is a bellows, a vacuum valve for main circuit opening / closing fixed to the other insulating cylinder end face via a sealing member, and a cylindrical insulator in the insulating cylinder. The operation rod fixed to the end surface of the insulator is fixed to the end surface of the insulating cylinder via the bellows and the sealing member, and the connecting rod fixed to the other end surface of the cylindrical insulator is connected to the end of the bellows and the sealing member. In the vacuum insulation rod unit fixed to the other insulating cylinder end face, the movable side electrode rod of the main circuit opening / closing vacuum valve and the connection rod of the vacuum insulation rod unit are connected, and one end of the flexible conductor is connected, and the other end Connect the external circuit to the main circuit The movable side sealing member of the vacuum valve for closing and the sealing member on the connecting rod side of the vacuum insulating rod unit are joined to the hermetic container, the outer conductor penetrates the hermetic container hermetically, and the flexible conductor is placed in the hermetic container. The composite insulated switchgear is characterized in that gas is sealed in the hermetic container, the surroundings are molded with resin integrally with the conductors and sensors, and the surface is subjected to a conductive treatment to make it a ground potential. Proposed.

  According to the first embodiment of the present invention, the circuit opening / closing vacuum valve unit 120 that houses the circuit opening / closing portion composed of the fixed electrode 4a and the movable electrode 4b, and the insulating rod member disposed in a vacuum are provided. An insulating rod member drives the movable electrode 4b of the circuit opening / closing portion to open / close the circuit opening / closing portion, and is disposed between the circuit opening / closing vacuum valve unit 120 and the vacuum insulating rod unit 130. An airtight container 150, a flexible conductor housed in the airtight container 150, one end of which is electrically connected to the movable electrode 4 b of the circuit opening and closing unit, and the other end is electrically connected to a connection terminal including an external conductor 46. A member 15, the circuit opening / closing vacuum valve unit 120, the vacuum insulating rod unit 130, and the airtight container 150. Since it is integrally formed as an integral mold 20 with a molding member such as an epoxy resin together with the connection terminal comprising the external conductor 46, a flexible conductor member is attached to the airtight container unitized with the circuit opening / closing vacuum valve unit and the vacuum insulating rod unit. A switchgear that can be improved in reliability with a simple configuration can be provided by housing and integrally forming them with a molding member.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIG. FIG. 2 is an airtight container assembly diagram showing a configuration of a main part in the second embodiment.
In the second embodiment, the configuration other than the specific configuration described here has the same configuration contents and method as the configuration and method in the first embodiment described above, and has the same effect. It is. In the drawings, the same reference numerals indicate the same or corresponding parts.

In FIG. 2, a part 150 a of the airtight container is brazed and joined to the sealing member 90 of the main circuit opening / closing vacuum valve 120 in accordance with the production of the main circuit vacuum valve 120. A part 150 b of the airtight container is brazed and joined to the sealing member 91 of the vacuum insulating rod unit 130 in accordance with the manufacture of the vacuum insulating rod unit 130. The outer conductor 46 penetrates a part 150d of the airtight container and is airtightly joined.
The flexible conductor 15 is connected to one end of the external conductor 46, the flexible conductor 15 is connected to the movable electrode rod 6, and the connecting rod 8 is connected to the movable electrode rod 6. The airtight container portions 150a, 150b, and 150d are airtightly joined, and finally the airtight container portion 150c is airtightly joined to form the airtight container 150.
Here, the method and the shape of the airtight container shown in FIG. 2 are examples, and the effect is obtained by joining a part of the airtight container to the vacuum valve 120 for opening and closing the main circuit and the vacuum insulating rod unit 130, respectively. Is obtained.

  Since the portions 150a and 150b of the airtight container are brazed and joined to the main circuit opening / closing vacuum valve 120 and the vacuum insulating rod unit 130 in advance, the positioning becomes easy and the formation of the airtight container 150 can be simplified. The work of brazing the part 150a, 150b of the airtight container to the vacuum valve 120 for opening / closing the main circuit and the vacuum insulating rod unit 130 adds one part to the assembly process, but positioning and fixing with a jig is easy. The impact on manufacturing costs is small. Rather, the work required for positioning when forming the airtight container 150 takes more time, so that the manufacturing cost can be reduced overall.

  According to the second embodiment of the present invention, the circuit opening / closing vacuum valve unit 120 that houses the circuit opening / closing portion composed of the fixed electrode 4a and the movable electrode 4b, and the insulating rod member disposed in a vacuum are provided. The insulating rod member drives the movable electrode 4b of the circuit opening / closing portion to open / close the circuit opening / closing portion, and the insulating rod member of the vacuum insulating rod unit 130 disposed in the insulating cylinder 3 constitutes the insulating rod member. A cylindrical insulator 7, which is bonded to one end face of the insulator 7 and fixed to the end face of the insulating cylinder 2 constituting the circuit opening / closing vacuum valve unit via the sealing member 90 and via the sealing member 91. A connecting member comprising a connecting rod 8 fixed to an end face of an insulating cylinder 7 constituting the vacuum insulating rod unit, the circuit open / close vacuum valve unit 120 and the vacuum An airtight container 150 disposed between the edge rod unit 130 and a terminal connected to the movable electrode 4b of the circuit opening / closing portion and housed in the airtight container 150 and having the other end as a connection terminal made of an external conductor 46. A flexible conductor member 15 that is electrically connected is provided, and the periphery of the vacuum valve unit 120 for circuit opening and closing, the vacuum insulating rod unit 130, and the hermetic vessel 150 are integrated with a connection terminal made of the outer conductor 46 with a molding member. In manufacturing the switchgear molded into a part, a part 150a of the airtight container 150 is joined to the sealing member 90 constituting the circuit opening / closing vacuum valve unit 120 in accordance with the manufacture of the circuit opening / closing vacuum valve unit, Part 150b of the vacuum insulating rod unit in accordance with the manufacture of the vacuum insulating rod unit 130. The flexible conductor member is housed in a unitized airtight container together with a circuit opening / closing vacuum valve unit and a vacuum insulating rod unit, and these are formed by a mold member. By integrally molding, it is possible to provide a method for manufacturing a composite insulated switchgear that can manufacture a switchgear that can improve reliability with a simple configuration with good workability.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIG. FIG. 3 is an airtight container assembly diagram showing a configuration of a main part in the third embodiment.
In the third embodiment, configurations other than the specific configurations described here have the same configuration contents and method contents as the configurations and methods in the first embodiment and the embodiment described above, and are the same. It has an effect. In the drawings, the same reference numerals indicate the same or corresponding parts.

The configuration in the third embodiment is the same as or equivalent to that in the first embodiment. The positioning member 100 is brazed and joined to the sealing member 90 of the main circuit opening / closing vacuum valve 120 in accordance with the production of the main circuit vacuum valve 120. The positioning member 100 is brazed and joined to the sealing member 91 of the vacuum insulating rod unit 130 in accordance with the manufacture of the vacuum insulating rod unit 130.
The positioning member 100 has an engaging portion 100a, and a hole is provided in a part 150e of the hermetic container so as to be positioned by fitting and airtight joining is performed. The outer conductor 46 penetrates a part 150g of the airtight container and is airtightly joined. The flexible conductor 15 is connected to one end of the external conductor 46, the flexible conductor 15 is connected to the movable electrode rod 6, and the connecting rod 8 is connected to the movable electrode rod 6. The airtight container parts 150e and 150g are airtightly joined, and finally the airtight container part 150f is airtightly joined to form the airtight container 150.

  Since the positioning member 100 is brazed to the main circuit opening / closing vacuum valve 120 and the vacuum insulating rod unit 130, positioning is facilitated, and the formation of the airtight container 150 can be simplified. Compared to the case of joining a part of the vacuum vessel described above, the number of airtight joints increases, leading to a slight increase in manufacturing cost. However, since only the positioning member 100 is joined, depending on the required specifications, it is possible to change the airtight container. It is easy to proceed with standardization, and as a result, it can cope with various specifications and reduce costs.

  According to the third embodiment of the present invention, the circuit opening / closing vacuum valve unit 120 that houses the circuit opening / closing portion composed of the fixed electrode 4a and the movable electrode 4b, and the insulating rod member disposed in a vacuum are provided. The insulating rod member drives the movable electrode 4b of the circuit opening / closing portion to open / close the circuit opening / closing portion, and the insulating rod member of the vacuum insulating rod unit 130 disposed in the insulating cylinder 3 constitutes the insulating rod member. A cylindrical insulator 7, which is bonded to one end face of the insulator 7 and fixed to the end face of the insulating cylinder 2 constituting the circuit opening / closing vacuum valve unit via the sealing member 90 and via the sealing member 91. A connecting member comprising a connecting rod 8 fixed to an end face of an insulating cylinder 7 constituting the vacuum insulating rod unit, the circuit open / close vacuum valve unit 120 and the vacuum An airtight container 150 disposed between the edge rod unit 130 and a terminal connected to the movable electrode 4b of the circuit opening / closing portion and housed in the airtight container 150 and having the other end as a connection terminal made of an external conductor 46. A flexible conductor member 15 that is electrically connected is provided, and the periphery of the vacuum valve unit 120 for circuit opening and closing, the vacuum insulating rod unit 130, and the hermetic vessel 150 are integrated with a connection terminal made of the outer conductor 46 with a molding member. In manufacturing the switchgear formed in the above, the positioning member 100 with the hermetic container 150 is joined to the sealing member 90 constituting the circuit opening / closing vacuum valve unit 120 at the time of manufacturing the circuit opening / closing vacuum valve unit 120. The member 100 for positioning with the other part of the airtight container 150 is a vacuum insulating rod unit. Since it is joined to the sealing member 91 constituting the vacuum insulating rod unit 120 at the time of manufacture of the circuit 30, the flexible conductor is connected to the airtight container unitized with the circuit opening / closing vacuum valve unit and the vacuum insulating rod unit. It is possible to provide a manufacturing method of a composite insulated switchgear that can manufacture a switchgear that can improve reliability with a simple configuration by using a positioning member by housing the members and integrally forming them with a mold member. it can.

Embodiment 4 FIG.
A fourth embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a cross-sectional view of a vacuum insulating rod unit showing the configuration in the fourth embodiment. FIG. 5 is a cross-sectional view of a vacuum insulating rod unit showing a modified configuration in the fifth embodiment.
In the fourth embodiment, the configuration other than the specific configuration described here has the same configuration contents and method contents as the configurations and methods in the first to third embodiments described above. It has the same effect. In the drawings, the same reference numerals indicate the same or corresponding parts.

  In FIG. 4, electric field relaxation shields 180 are provided at both ends of the insulator 7 of the vacuum insulating rod unit 130. The junction between the operating rod 33 and the insulator 7 and the junction between the connecting rod 8 and the insulator 7 are triple junctions where the boundary between the metal, the insulator and the vacuum intersects, and the electric field strength is high. By providing 180, the electric field strength of the triple junction portion can be reduced, and the creeping length of the insulator 7 can be shortened compared to the case where the shield for electric field relaxation 180 is not provided. Although the variation in the withstand voltage performance is large, the withstand voltage performance is stabilized and the reliability of the electrical insulation performance is improved by providing the tip with a large radius.

  FIG. 5 shows the vacuum insulating rod unit 130 for a required specification having a high withstand voltage performance. In addition to the insulator 7, the withstand voltage performance of the inner creeping surface of the insulating cylinder 3 becomes a problem. There is a triple junction at the junction between the insulator 3 and the sealing members 91 and 31, and the creeping length is longer than that of the insulator 7. However, when there is no electric field relaxation shield, the inner creepage surface of the insulating cylinder 3 may have a lower withstand voltage performance. Separately, an electric field relaxation shield may be provided, but in order to suppress an increase in cost, a change in the shape of the electric field relaxation shield 180 for the insulator 7 can be used. The electric field relaxation of the triple junction is achieved by forming the straight portion 180b in contact with the rounded portion 180a of the electric field relaxation shield 180, approaching the inner surface of the insulating cylinder 3 at a certain angle, and having a space that does not contact the inner surface. The effect is added to the electric field relaxation shield 180.

  By providing the electric field relaxation shield 180, the total length of the insulator 7 and the insulating cylinder 3 can be shortened, and the vacuum insulating rod unit 130 can be downsized in the full length direction, so that the composite insulating switch can be downsized in the height direction. This can be realized, and the reliability of the electrical insulation performance can be improved.

  According to the fourth embodiment of the present invention, in any configuration in the first to third embodiments, the cylindrical insulator 7 constituting the insulating rod member is joined to the end surface of the insulator 7. Since the electric field relaxation shield 180 is provided, which includes a connecting member made of the connecting rod 8 and which electrically relaxes the joint between the insulator 7 and the connecting member made of the connecting rod 8, The flexible conductor member is housed in a unitized airtight container together with the vacuum insulating rod unit, and these are integrally molded with the mold member, so that the reliability can be improved with a simple configuration, and the insulator and the connection member It is possible to provide a switchgear that can appropriately relax the electric field at the joint.

  According to the fourth embodiment of the present invention, in any one of the first to third embodiments, the cylindrical insulator 7 that is disposed in the insulating cylinder 3 and constitutes the insulating rod member. A connecting member composed of a connecting rod 8 joined to the end surface of the insulator 7 and fixed to the end surface of the insulating cylinder 3 via a sealing member 91, and a connecting member composed of the insulator 7 and the connecting rod 8. Since the electric field relaxation shield 180 having the tip rounded portion 180 and the straight portion 180b that relaxes the joint portion in terms of electric field and relaxes the joint surface between the insulating cylinder 3 and the sealing member 91 in terms of electric field is provided. The flexible conductor member is housed in a unitized airtight container together with the vacuum valve unit for vacuum and the vacuum insulating rod unit, and these are integrally formed with a mold member, thereby providing a simple configuration. It is possible to improve the-reliability, it is possible to provide a switchgear capable of accurately relax the electric field at the junction surface between the junction and the insulating tube and the sealing member between the insulator and the connecting member.

It is sectional drawing which shows the structure in Embodiment 1 by this invention. It is an airtight container assembly drawing which shows the structure of the principal part in Embodiment 2 by this invention. It is an airtight container assembly drawing which shows the structure of the principal part in Embodiment 3 by this invention. It is sectional drawing of the vacuum insulation rod unit which shows the structure in Embodiment 4 by this invention. It is sectional drawing of the vacuum insulation rod unit which shows the deformation | transformation structure in Embodiment 4 by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum, 2 Insulating cylinder, 3 Insulating cylinder, 4 Main circuit opening / closing part, 4a Fixed electrode, 4b Movable electrode, 5 Fixed electrode bar, 6 Movable electrode bar, 7 Insulator, 8 Connection bar, 15 Flexible conductor, 20 Mold, 21 Conductive treatment layer, 25, 26 Bushing, 30 Sealing member, 31 Sealing member, 32 Bellows, 33 Operating rod, 34, 35 Bellows, 45, 46 External conductor, 50 Arc shield, 70 Operating device, 90, 91 sealing member, 100 positioning member, 100a engaging portion, 120 vacuum valve for main circuit opening / closing, 130 vacuum insulation rod unit, 150 airtight container, 150a, 150b, 150c, 150d, 150e, 150f, 150g one of airtight containers Part, 180 electric field relaxation shield, 180a round part, 180b straight part, 200 gas.

Claims (6)

  A circuit opening / closing vacuum valve unit that houses a circuit opening / closing part composed of a fixed electrode and a movable electrode, and an insulating rod member disposed in a vacuum, and the insulating rod member drives the movable electrode of the circuit opening / closing part. A vacuum insulating rod unit for opening / closing the circuit opening / closing part, an airtight container disposed between the vacuum valve unit for circuit opening / closing and the vacuum insulating rod unit, and one end of the circuit opening / closing part housed in the airtight container A switchgear comprising a flexible conductor member electrically connected to the movable electrode and having the other end electrically connected to the connection terminal.   A circuit opening / closing vacuum valve unit that houses a circuit opening / closing part composed of a fixed electrode and a movable electrode, and an insulating rod member disposed in a vacuum, and the insulating rod member drives the movable electrode of the circuit opening / closing part. A vacuum insulating rod unit for opening / closing the circuit opening / closing part, an airtight container disposed between the vacuum valve unit for circuit opening / closing and the vacuum insulating rod unit, and one end of the circuit opening / closing part housed in the airtight container A flexible conductor member electrically connected to the movable electrode and having the other end electrically connected to the connection terminal, and the circuit valve opening and closing vacuum valve unit, the vacuum insulating rod unit, and the periphery of the airtight container are connected A switchgear that is integrally formed with a molding member together with a terminal.   A columnar insulator constituting the insulating rod member, a connection member bonded to an end surface of the insulator, and an electric field relaxation shield that relaxes the junction between the insulator and the connection member in an electric field. The switchgear according to claim 1 or 2, characterized in that.   A cylindrical insulator which is disposed in an insulating cylinder and constitutes the insulating rod member, and a connecting member which is bonded to an end face of the insulating cylinder via a sealing member and bonded to the end face of the insulator; 4. The switchgear according to claim 3, further comprising an electric field relaxation shield that relaxes the joint portion with the connection member in terms of electric field and relaxes the joint surface between the insulating tube and the sealing member in terms of electric field. .   A circuit opening / closing vacuum valve unit that houses a circuit opening / closing part composed of a fixed electrode and a movable electrode, and an insulating rod member disposed in a vacuum, and the insulating rod member drives the movable electrode of the circuit opening / closing part. A vacuum insulating rod unit that opens and closes the circuit opening and closing unit, a cylindrical insulator that is disposed in an insulating cylinder and constitutes the insulating rod member, and is opened and closed via a sealing member that is joined to one end face of the insulator A connection member fixed to an end face of an insulating cylinder constituting the vacuum insulating rod unit and a connection member fixed to an end face of the insulating cylinder constituting the vacuum insulating rod unit via a sealing member; An airtight container disposed between the vacuum insulating rod unit and one end electrically connected to the movable electrode of the circuit opening and closing portion, housed in the airtight container, and connected to the other end And a flexible conductor member that is electrically connected to the switchgear, and a switchgear that is integrally molded with a molding member together with the connection terminal around the vacuum valve unit for circuit opening and closing, the vacuum insulating rod unit, and the airtight container. At this time, a part of the hermetic container is joined to a sealing member constituting the vacuum valve unit for circuit opening / closing in accordance with the manufacture of the vacuum valve unit for circuit opening / closing, and another part of the hermetic container is combined in manufacturing the vacuum insulating rod unit. A method for manufacturing a switchgear, wherein the switchgear is joined to a sealing member constituting the vacuum insulating rod unit. A circuit opening / closing vacuum valve unit that houses a circuit opening / closing part composed of a fixed electrode and a movable electrode, and an insulating rod member disposed in a vacuum, and the insulating rod member drives the movable electrode of the circuit opening / closing part. A vacuum insulating rod unit that opens and closes the circuit opening and closing unit, a cylindrical insulator that is disposed in an insulating cylinder and constitutes the insulating rod member, and is opened and closed via a sealing member that is joined to one end face of the insulator A connection member fixed to an end face of an insulating cylinder constituting the vacuum insulating rod unit and a connection member fixed to an end face of the insulating cylinder constituting the vacuum insulating rod unit via a sealing member; An airtight container disposed between the vacuum insulating rod unit and one end electrically connected to the movable electrode of the circuit opening and closing portion, housed in the airtight container, and connected to the other end And a flexible conductor member that is electrically connected to the switchgear, and a switchgear that is integrally molded with a molding member together with the connection terminal around the vacuum valve unit for circuit opening and closing, the vacuum insulating rod unit, and the airtight container. At this time, the positioning component with the hermetic container is joined to the sealing member constituting the vacuum valve unit for circuit opening / closing together with the manufacture of the vacuum valve unit for circuit opening / closing, and the positioning component with the other hermetic container is vacuum A method for manufacturing a switchgear, wherein the switchgear is joined to a sealing member constituting the vacuum insulating rod unit in accordance with the manufacturing of the insulating rod unit.

Images