JP2013013285A - Gas insulation high voltage apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas insulation high voltage apparatus which inhibits foreign objects occurring during the assembly of the apparatus or the like from entering into the apparatus, realizes the downsizing of the apparatus, and achieves good insulation performance.SOLUTION: In a gas insulation high voltage apparatus 10, a high voltage conductor 3 is fixed and disposed in an interior space of metal containers 1 by insulation supporters 5 fixed to the metal containers 1 at connection parts 7 where opening end parts of the multiple cylindrical metal containers 1, having the opening end parts, are connected with each other. Further, an insulation gas 8 is enclosed in the interior space. In the gas insulation high voltage apparatus 10, a viscous substance is applied to a first joining surface joining with the insulation supporter 5 at an end part of the metal container 1.

Description

  Embodiments described herein relate generally to a gas-insulated high-voltage device that can suppress foreign matters generated during assembly of the device from entering the device.

  In gas-insulated high-voltage equipment, it is desired to further reduce the equipment by optimizing the insulation design and reducing the cost by integrating the three-phase equipment. The size of gas-insulated high-voltage equipment is basically determined by insulation design and heat dissipation design.

  FIG. 7 shows the structure of a conventional gas insulated high voltage device.

  In the gas-insulated high-voltage device 50, the high-voltage conductor 3 is insulated and supported by the insulating support 5 inside the metal container 1 made of metal. The metal containers 1 are connected to each other by a connecting portion 7, and the insulating support 5 is fixed to the metal container 1 at the connecting portion 7. Further, an insulating gas 8 is sealed inside the metal container 1.

  In the gas-insulated high-voltage device 50, when the metal containers 1 are connected to each other, the metal foreign matter 9 may be mixed into the metal container 1 due to friction between the metals. At this time, since the charge q is supplied from the metal container 1 to the metal foreign object 9, the metal foreign substance 9 is acted on by an electrostatic force (F = qE) by the operating electric field E formed by the high voltage conductor 3, and the arrow shown in the figure. There is a possibility that the metal foreign matter 9 moves around inside the metal container 1.

  As the device becomes more compact in recent years, the operating electric field inside the metal container 1 increases and the electrostatic force also increases, so that the metal foreign matter 9 moves excessively inside the metal container 1 and approaches the vicinity of the high-voltage conductor 3. It becomes easy. As a result, there is a possibility that the insulation performance as a device is lowered and insulation breakdown occurs.

  In order to suppress the behavior of the metal foreign object 9 in such an operating electric field, the electric field on the inner surface of the metal container 1 needs to be lower than the floating electric field value of the metal foreign object 9, and the inner diameter of the metal container 1 must be larger than a certain dimension. No longer get. That is, the size of the metal container 1 is determined by the electric field necessary to suppress the behavior of the largest foreign matter that cannot be removed in production management, which is a limiting factor for reducing the GIS.

  As a countermeasure for reducing the restriction condition for reducing the size of the equipment due to the mixed foreign matter as described above, there is a technique using an insulating coating.

  FIG. 8 shows the structure of a conventional gas-insulated high-voltage device using an insulating coating.

  The gas-insulated high-voltage device 60 is formed in the same manner as the gas-insulated high-voltage device 50 shown in FIG. 7 except that the inner surface of the metal container 1 is coated with an insulating coating 6 by painting or the like.

  When the insulating coating 6 is applied, it is difficult for the electric charge q to be supplied from the inner surface of the metal container 1 to the metal foreign matter 9, and as a result, the electrostatic force (F = qE) acting on the metal foreign matter 9 is reduced and the metal foreign matter 9 is unlikely to behave. Become.

  However, with such an insulating coating 6 alone, there is a high possibility that foreign matter will behave due to the propagation of impact vibration generated during the opening / closing operation of the high-voltage switchgear in the vicinity of the high-voltage device.

  Moreover, regarding the inner surface coating of the hermetic switchgear, if the coating is peeled off, the peeled piece may adversely affect the insulation performance of the device. For this reason, in order to ensure insulation performance reliability, it is necessary to maintain quality so that there is no peeling of a coating.

  On the other hand, a technique for applying an adhesive coating has been proposed as a solution based on a technical idea completely different from the technique for applying the insulating coating.

  FIG. 9 shows the structure of a conventional gas-insulated high-voltage device using an adhesive coating.

  In this gas-insulated high-voltage device 70, the gas-insulated high-voltage device 50 shown in FIG. 7 is the same as that shown in FIG. 7 except that the inner surface of the metal container 1 is provided with an adhesive coating 6 ′ made of a rubber-based elastomer having adhesiveness and elasticity. It is formed similarly.

  When an adhesive coating is applied to the inner surface of the metal container 1 with a rubber-based elastomer, the metal foreign matter 9 is captured by the adhesiveness of the elastomer, so that the effect of suppressing the movement of the metal foreign matter 9 can be expected even against impact vibration.

JP-A-3-45111

  However, since the rubber-based elastomer is generally more expensive than the insulating coating, if the elastomer coating is applied to the entire inner surface of the metal container 1 of the device, the device becomes expensive. In order to avoid this, it is conceivable to apply the elastomer coating only to a necessary portion of the inner surface of the metal container 1 of the device, but the following problems occur.

  That is, the foreign material that may occur in the bolt fastening operation or the like in the connecting portion 7 of the metal container 1 is generally a needle-shaped metal foreign material 9. When such needle-like metal foreign matter 9 enters outside the range of the adhesive coating 6 ′ made of elastomer coating, if the needle-like metal foreign matter 9 behaves during operation of the device and enters the range of elastomer coating. The needle-shaped metal foreign material 9 is captured by the adhesive coating 6 ′ made of an elastomer coating while standing in the direction in which the electrostatic force acts. In this state, if a high voltage enters due to a lightning strike or the like on the transmission line, there is a high risk of dielectric breakdown starting from the needle-shaped metal foreign material 9 standing on the elastomer coating. .

  Therefore, an embodiment of the present invention provides a gas-insulated high-voltage device with good insulation performance that can prevent foreign matters generated during assembly of the device from being mixed inside the device and realize reduction of the device. With the goal.

  In order to achieve the above-described object, the gas-insulated high-voltage device according to the embodiment of the present invention is provided in the metal container at a connection portion where the open ends of a plurality of cylindrical metal containers having open ends are connected. In a gas-insulated high-voltage apparatus in which a high-voltage conductor is fixedly disposed in the internal space of the metal container by a fixed insulating support and an insulating gas is sealed in the internal space, the insulation is provided at an end of the metal container. An adhesive substance is applied to the first bonding surface to be bonded to the support.

The assembly drawing which shows 1st Embodiment of the gas insulation high voltage apparatus which concerns on this invention. The enlarged view of the II section of FIG. The assembly drawing which shows 2nd Embodiment of the gas insulation high voltage apparatus which concerns on this invention. The enlarged view of the IV section of FIG. The assembly drawing which shows the whole structure of 3rd Embodiment of the gas insulation high voltage apparatus which concerns on this invention. The block diagram which shows 4th Embodiment of the gas insulation high voltage apparatus which concerns on this invention. Schematic which shows the structure of the conventional gas insulation high voltage apparatus. Schematic which shows the structure of the conventional gas insulation high voltage apparatus using an insulation coating. Schematic which shows the structure of the conventional gas insulation high voltage apparatus using an adhesive coating.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. In addition, the same code | symbol is attached | subjected about the same member as the gas insulation high voltage apparatus shown in FIG. 7 as a prior art example, and description is abbreviate | omitted.

[First Embodiment]
(overall structure)
FIG. 1 is an assembly diagram showing the overall configuration of a first embodiment of a gas-insulated high-voltage device according to the present invention. FIG. 2 is an enlarged view of a portion II in FIG.

  In the gas-insulated high-voltage device 10 of the present embodiment, as shown in FIG. 2, the adhesive substance 13 is applied to the bonding surface 11 of the metal container 1 and the bonding surface 12 of the insulating support 5.

  As the adhesive substance 13, silicone gel or the like can be used.

  Further, the application range of the adhesive substance 13 on the joint surface 11 and the joint surface 12 is a metal container rather than the O-ring 15 formed on the joint surface 12 in order to keep the inside and outside of the metal container 1 airtight. It is preferable to apply to the outer area 17 with respect to the direction perpendicular to the longitudinal direction of 1.

  Furthermore, the adhesive substance 13 to be applied can be made conductive.

(Action / Effect)
In the gas-insulated high-voltage device 10 according to the present embodiment, the adhesive material 13 is applied to the joint surface 11 of the metal container 1 and the joint surface 12 of the insulating support 5, so the gas-insulated high-voltage device 10 is assembled. At this time, even if the metal container 1 and the insulating support 5 are connected by the connecting portion 7 and the needle-like metal foreign matter is generated when the bolting is performed, the needle-like metal foreign matter is captured by the adhesive substance 13. be able to.

  Thereby, since it can prevent that a needle-shaped metal foreign material mixes in the metal container 1, the gas insulated high-voltage apparatus 10 can be assembled without mixing the metal foreign material 9 inside.

  Further, since the application range of the adhesive substance 13 is applied outside the position where the O-ring 15 is formed, the adhesive substance 13 is maintained while maintaining the airtight performance of the O-ring 15. Capturing of metal foreign matter can be realized.

  Furthermore, since the adhesive substance 13 can be a conductive substance, the contact resistance between the metal containers 1 can be lowered, so that an unexpected voltage is induced in the metal container 1 for some reason. However, it is possible to quickly drop the voltage to ground. For this reason, there is little risk of electric shock even when a person touches the metal container 1.

  As described above, it is possible to provide a gas-insulated high-voltage device 10 that has good gas tightness inside and outside the metal container 1, reduces the risk of electric shock by keeping foreign matter below the control limit, and reduces the size of the device. Can do.

[Second Embodiment]
(overall structure)
FIG. 3 is an assembly diagram showing the overall configuration of the second embodiment of the gas-insulated high-voltage apparatus according to the present invention. FIG. 4 is an enlarged view of a portion IV in FIG.

  In the gas-insulated high-voltage apparatus 20 of the present embodiment, as shown in FIG. 4, the adhesive substance 13 is attached to the joint surface 23 and the joint surface 24 where the pipe flange 21 and the gas pipe 22 installed in the metal container 1 are joined. Is applied.

  As the adhesive substance 13, silicone gel or the like can be used.

  Further, the application range of the adhesive substance 13 on the bonding surface 23 and the bonding surface 24 is such that the metal container is more than the O-ring 25 formed on the bonding surface 24 in order to maintain the airtightness between the inside and the outside of the metal container 1. It is preferable to apply to the outer area 27 with respect to the longitudinal direction of 1.

  Furthermore, the adhesive substance 13 to be applied can be made conductive.

(Action / Effect)
In the gas-insulated high-voltage device 20 according to the present embodiment, the adhesive substance 13 is applied to the joining surface 23 and the joining surface 24, so that the inside of the metal container 1 is evacuated and the insulating gas 8 is sealed. Can be captured by the adhesive substance 13 applied to the joint surface 23 and the joint surface 24, which is generated when the gas pipe 22 is connected by the pipe flange 21 and bolted. .

  Thereby, since it can prevent that a needle-shaped metal foreign material mixes in the metal container 1, the gas piping 22 can be connected, without mixing a metal foreign material inside.

  Further, since the application range of the adhesive substance 13 is applied outside the position where the O-ring 25 is formed, the adhesive substance 13 is maintained while maintaining the airtight performance of the O-ring 25. Capturing of metal foreign matter can be realized.

  Furthermore, since the adhesive substance 13 can be a conductive substance, the contact resistance between the metal containers 1 can be lowered, so that an unexpected voltage is induced in the metal container 1 for some reason. However, it is possible to quickly drop the voltage to ground.

  For this reason, there is little risk of electric shock even when a person touches the metal container 1.

  As described above, it is possible to provide a gas-insulated high-voltage device 20 that has good gas tightness inside and outside the metal container 1, reduces the risk of electric shock by keeping foreign matter below the control limit, and reduces the size of the device. Can do.

[Third Embodiment]
(overall structure)
FIG. 5 is an assembly diagram showing the overall configuration of the third embodiment of the gas-insulated high-voltage device according to the present invention.

  In the gas-insulated high-voltage device 30 of the present embodiment, the embedded electrode 31 is provided at the center of the insulating support 5, and the connection surface 32 is connected to the end of the high-voltage conductor 3 and the embedded electrode 31. An adhesive substance 13 is applied.

  Moreover, the adhesive substance 13 to be applied can be made conductive.

(Action / Effect)
In the gas-insulated high-voltage device 30 according to the present embodiment, the adhesive substance 13 is applied to the connection surface 32 between the high-voltage conductor 3 and the embedded electrode 31, so that the high-voltage conductor 3 is applied to the embedded electrode 31. When inserting / connecting, powdery metal foreign matter generated when metals rub against each other can be captured by the adhesive substance 13.

  Thereby, since it can prevent that a powdery metal foreign material advances to the inner surface of the metal container 1, the gas insulation high voltage apparatus 30 can be assembled without mixing a metal foreign material inside.

  Furthermore, since the adhesive substance 13 is made of a conductive substance, the contact resistance between the high voltage conductor 3 and the embedded electrode 31 can be lowered. The temperature rise of the connection surface due to the current can be suppressed low. For this reason, the gas insulation high voltage apparatus 30 with favorable electricity_supply performance can be provided.

  As described above, it is possible to provide a gas-insulated high-voltage device 30 that has good gas tightness inside and outside the metal container 1, reduces the risk of electric shock by keeping foreign matter below the control limit, and reduces the size of the device. Can do.

[Fourth Embodiment]
(overall structure)
FIG. 6 is a configuration diagram showing a fourth embodiment of the gas-insulated high-voltage device according to the present invention.

  In the gas-insulated high-voltage device 40 according to the present embodiment, a contact part 41 that switches between an energized state and an interrupted state is formed on a part of the high-voltage conductor 3 installed inside the metal container 1. This contact portion 41 is composed of a fixed contact 42 and a movable contact 43, and the movable contact 43 moves to contact the fixed contact 42 to bring the contact 41 into an "ON" state. This makes it possible to move the movable contact 43 and move away from the fixed contact 42 so that the contact portion 41 can be turned off.

  Further, the adhesive substance 13 is applied to the contact surface 44 between the movable contact 43 and the fixed contact 42.

  Moreover, the adhesive substance 13 to be applied can be made conductive.

(Action / Effect)
In the gas-insulated high-voltage device 40 according to the present embodiment, since the adhesive substance 13 is applied to the contact surface 44 between the movable contact 43 and the fixed contact 42, electricity is cut off from the energized state, Alternatively, the powdery metal foreign matter generated when the metals slide in the contact point turning-on / off operation for switching from the interrupted state to the energized state can be captured by the adhesive substance 13.

  Thereby, since it can prevent that a powdery metal foreign material advances to the inner surface of the metal container 1, energization operation and interruption | blocking operation of the gas insulation high voltage apparatus 40 are performed, without mixing a metal foreign material inside. Can do.

  Furthermore, since the adhesive substance 13 is made of a conductive substance, the contact resistance between the movable contact 43 and the fixed contact 42 can be lowered, so that the gas-insulated high-voltage device 40 can be operated. The temperature rise of the contact surface due to the energization current can be kept low. For this reason, the gas insulation high voltage apparatus 40 with favorable electricity supply performance can be provided.

  As described above, it is possible to provide a gas-insulated high-voltage device 40 that has good gas tightness inside and outside the metal container 1, reduces the risk of electric shock by keeping foreign matter below the control limit, and reduces the size of the device. Can do.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Metal container 3 ... High voltage conductor 5 ... Insulating support 6 ... Insulating coating 6 '... Adhesive coating 7 ... Connection part 8 ... Insulating gas 9 ... Metal foreign material 10 ... Gas insulated high voltage apparatus 11 ... Joining surface (1st Joint surface)
12 ... Joining surface (second joining surface)
DESCRIPTION OF SYMBOLS 13 ... Adhesive substance 15 ... O-ring 17 ... Outer side range 20 ... Gas insulation high voltage apparatus 21 ... Piping flange 22 ... Gas piping 23 ... Joining surface (3rd joining surface)
24: Joining surface (fourth joining surface)
25 ... O-ring 27 ... outer range 30 ... gas-insulated high-voltage equipment 31 ... embedded electrode 32 ... connection surface 40 ... gas-insulated high-voltage equipment 41 ... contact part 42 ... fixed contact 43 ... movable contact 44 ... contact Surface 50 ... Gas-insulated high-voltage equipment 60 ... Gas-insulated high-voltage equipment 70 ... Gas-insulated high-voltage equipment

Claims (8)

A high voltage conductor is fixedly disposed in the internal space of the metal container by an insulating support fixed to the metal container at a connecting portion where the open ends of the plurality of cylindrical metal containers having the open ends are connected to each other. And in a gas-insulated high-voltage device in which an insulating gas is sealed in the internal space,
A gas-insulated high-voltage apparatus, wherein a sticky substance is applied to a first joint surface that joins the insulating support at an end of the metal container.   The gas-insulated high-voltage apparatus according to claim 1, wherein an adhesive substance is applied to a second joining surface that joins the metal container in the insulating support.   The O-ring is provided on a part of the second joining surface, and the adhesive substance is applied to the outside of the O-ring in a direction perpendicular to the longitudinal direction of the metal container. Gas-insulated high-voltage equipment as described.   A gas pipe for sealing the insulating gas in the internal space of the metal container is provided outside the metal container, and a third joint surface where the gas pipe joins the metal container and the metal container is the gas pipe The gas-insulated high-voltage device according to any one of claims 1 to 3, wherein an adhesive substance is applied to a fourth bonding surface to be bonded to the gas.   5. The gas insulation according to claim 4, wherein an O-ring is provided on a part of the fourth joint surface, and the adhesive substance is applied to the outside of the O-ring in the longitudinal direction of the metal container. High voltage equipment.   A buried electrode is provided at the center of the insulating support, the end of the high voltage conductor and the buried electrode are connected, and the connection surface between the high voltage conductor and the buried electrode is adhesive. The gas-insulated high-voltage apparatus according to any one of claims 1 to 5, wherein a substance is applied.   A contact portion configured to include a stationary contact provided at one end of the high voltage conductor and a movable contact provided at the other end of the high voltage conductor, and switch between an energized state and an interrupted state. The gas-insulated high-voltage device according to any one of claims 1 to 6, wherein an adhesive substance is applied to contact surfaces of the movable contact and the fixed contact. .   The gas-insulated high-voltage apparatus according to any one of claims 1 to 7, wherein the adhesive substance is conductive.

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