JP2000115969A - Method for assembling gas-insulated transmission line and transportation unit thereof, and structure for connecting conductors with each other - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for assembling gas-insulating transmission line and a transportation unit thereof, and a structure for connecting conductors with each other which can enhance reliability of insulation and have high ease of assembly at a low cost. SOLUTION: A conductive buried metal 3g with a supporting insulator 3a formed integrally at its outer periphery is fastened and fixed to the end of a conductor 2a by a bolt 16 passing through a hole 3m in the conductive buried metal 3g. Conductors 2a, 2b, which sandwich a conductive buried metal 3h with a supporting insulator 3b formed integrally, are fastened and integrated by a bolt 17 passing through a hole 3n in a conductive buried metal 3h. The supporting insulator 3a is fixed to a connecting ring 5a, and the supporting insulator 3b is slidingly supported by a pipe-diameter expanded part 1n, so that the conductors 2a, 2b are stored in metallic outer tubes 1a, 1b welded at a welded part B so as to be integrally formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated power transmission line and a transportation unit, which are constructed by supporting a conductor with a supporting insulator in a metal outer tube filled with an insulating gas, and to a connection structure between conductors. is there.

[0002]

2. Description of the Related Art FIG. 11 shows, for example, Japanese Patent Publication No. 60-24645.
FIG. 1 is a cross-sectional view showing a conventional gas-insulated power transmission line described in Japanese Patent Application Laid-Open Publication No. H10-209,004. 11, metal outer tube 1a, 1b, 1c is an insulating gas such as SF ₆ is sealed. Conductors 2a, 2
b, 2c are accommodated in the metal outer tubes 1a, 1b, 1c, and are supported by the metal outer tube 1a and the metal connecting rings 5a, 5b by supporting insulators 3a, 3b, 3c. Support insulator 3a
Is formed in a conical shape or a disk shape, and is fixed to the connecting ring 5a so as to maintain airtightness by using a gasket 11 in combination to separate the insulating gas in the metal outer tube 1a from the insulating gas in the metal outer tube 1b. are doing. The supporting insulator 3b is fixed to the conductor 2a and is in contact with the inner surface of the metal outer tube 1a via the sliding body 4, so as to release a difference in thermal expansion between the metal outer tube 1a and the conductor 2a in the longitudinal direction. . The supporting insulator 3b is formed as a tripod having no insulator at the bottom so as not to hinder the movement of impurities such as metal fine pieces in the insulating gas. The supporting insulators 3a and 3b are not shown, but around a short conductor that becomes a part of the conductor 2a near the supporting insulator,
It is manufactured by cast molding with epoxy resin containing filler. Then, the short conductor in which the supporting insulators 3a and 3b are integrated is welded to the long conductor to form the supporting insulators 3a and 3b.
For example, a method of manufacturing the conductor 2a in which the conductor 3b is integrated is adopted. The support insulator 3c is fixed to the conductor 2c and is fixed to the inner surface of the connection ring 5b.

[0003] The inner diameter of the connecting rings 5a, 5b is the outer metal tube 1a,
It is manufactured larger than the outer diameters of 1b and 1c. The metal outer tubes 1a and 1b are fitted into the connection ring 5a from both sides and connected by welding, and the metal outer tubes 1a and 1c are fitted into the connection ring 5b from both sides and connected by welding. The sliding contacts 6a, 6b slidably and conductively connect the thin protruding projections at the ends of the conductors 2a, 2b, 2c to the metal outer tubes 1a, 1b, 1c and the conductors 2a, 2c.
The structure allows the difference in thermal expansion between b and 2c to escape, and also facilitates assembly. The contact pressure is applied to the sliding contacts 6a and 6b by the annular spring 7, and the shields 8a and 8b relax the electric field to improve the withstand voltage characteristics. The protrusion 9 is formed on the inner peripheral surface of the connecting ring 5a, and the outer peripheral portion of the support insulator 3a is pressed by the pressing portion 10 using a gasket 11 such as an O-ring in a groove provided in the protrusion 9 to connect. It is fixed to the ring 5a. The gasket 12 is to prevent contaminants such as spatters generated during welding at the welds A and B from entering the inside.

[0004] The perforated electrodes 13a and 13b are made of cylindrical metal, are attached to the protruding portion 9 and the holding portion 10, and are provided with a number of slit-shaped holes at the bottom. Since a low electric field is generated between the perforated electrodes 13a and 13b and the ends of the connecting ring 5a and the outer metal tubes 1a and 1b, impurities such as metal fine pieces that jump and move by electrostatic force and gravity are formed in a slit shape. If it falls into a hole or a concave portion, it will not be able to jump again, and will act as an impurity trapping device 15 that will be trapped. The perforated electrode 13c
Similarly, a large number of slit-shaped holes are provided below the metal cylinder, and are fixed to the connection ring 5b. Therefore, the low electric field portion between the perforated electrode 13c, the connection ring 5b, and the ends of the metal outer tubes 1a, 1c functions as the impurity trapping device 15.

In the conventional gas insulated transmission line configured as described above, the voltage is gradually increased after being installed on site and filled with the insulating gas, and is maintained for a certain period of time. The operation of jumping and moving each of them and capturing what has reached the impurity capturing device 15 as it is is repeatedly performed until the voltage applied during operation becomes higher than the voltage applied. This is an operation called conditioning, and it is possible to remove impurities such as metal fine pieces which have a bad influence on the withstand voltage performance from the insulating gas. Note that, of the welded portions between the connection rings 5a, 5b and the metal outer tubes 1a, 1b, 1c, the welded portion B is implemented at a factory, and only the welded portion A is implemented locally.

Therefore, in this conventional gas insulated power transmission line, an impurity trapping device 15 for trapping impurities such as metal fine pieces in the gas which lowers the insulation performance of the insulating gas connects the metal outer tubes 1a, 1b and 1c. By using the connecting rings 5a and 5b, the perforated electrodes 13a, 13b, and 13c are provided here with a simple configuration, and a gas-insulated power transmission line that is inexpensive and has excellent insulating performance has been obtained.

[0007]

As described above, the conventional gas-insulated power transmission line is manufactured by welding and integrating a long conductor as the conductor 2a and a short conductor integrally formed with the supporting insulators 3a and 3b. Was used. Therefore, when manufacturing the conductor 2a housed in the metal outer tube 1a, welding is required, and there is a fear that the insulation performance of the gas insulating device may be deteriorated. In other words, welding that easily generates contaminants such as spatter does not meet the requirement that it is not desired to apply it to gas-insulated equipment that is vulnerable to fouling. Further, in the conventional gas insulated power transmission line, the impurity trapping device 15 is not provided near all the supporting insulators, but is not provided near the supporting insulator 3b.
The distance between the five was long. Therefore, after installation on the site, the time required for the conditioning work for trapping impurities by increasing the voltage little by little has been long. Further, when the impurity jumps and passes under the supporting insulator 3b in which the impurity capturing device 15 is not provided, the impurity jumps up and adheres to the supporting insulator 3b when the voltage is applied quickly, and the dielectric breakdown occurs. Could be triggered.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a supporting insulator is integrally formed on the outer periphery of a conductive buried metal by tightening and integrating the conductor with a bolt to form a weld. An object of the present invention is to eliminate the accompanying spatter contamination and obtain a gas-insulated power transmission line having excellent insulation reliability. Another object of the present invention is to provide a gas-insulated power transmission line in which an impurity trapping device is provided at a place where a supporting insulator is installed to reduce the conditioning time and suppress occurrence of dielectric breakdown due to impurities. Further, a gas-insulated power transmission line capable of improving assembly workability by fastening and integrating a conductive filler metal having a supporting insulator integrally formed on the outer periphery with a conductor using bolts passing through the conductive filler metal. It is an object of the present invention to obtain a method of assembling a transport unit. Furthermore, when the conductors are connected to each other by fastening bolts from the hollow portion of the hollow cylindrical conductor, a contact that is attached to the hollow portion of the conductor with a shield that closes a bolt fastening work opening provided on the conductor. It is an object of the present invention to obtain a connection structure between conductors that can be fixed by utilizing the spring force of the above and can improve the connection workability.

[0009]

In a gas insulated power transmission line according to the present invention, a plurality of power transmission line units each having a conductor supported by a supporting insulator and housed in a metal outer tube slide end portions of the conductor. Electrically connected using moving contacts, and
The ends of the metal outer tube are airtightly connected to each other to be elongated,
Further, in a gas-insulated power transmission line in which an insulating gas is sealed in a metal outer tube hermetically connected, one end of the conductor has a shape in which the sliding contact is fitted, and the conductive metal is filled with the conductive metal. The conductor is fastened and fixed to the other end of the conductor by a plurality of bolts penetrating in the axial direction, the supporting insulator is integrally formed on the outer periphery of the conductive filler metal, and the sliding contact is connected to the conductive filler metal. And a shield is attached to the conductive filling so as to cover the sliding contact.

Further, the shield is integrally fixed to the conductor together with the conductive metal by a plurality of bolts penetrating the conductive metal in the axial direction.

Further, the gas insulated power transmission line according to the present invention comprises:
A plurality of divided conductors are connected in the axial direction with conductive shafts sandwiched therebetween with their respective axes aligned, and a conductive filler metal is fixed to the tip of the divided conductor on one side of the plurality of divided conductors. A plurality of power transmission path units, each of which has a conductor which is supported by a supporting insulator formed integrally with the outer periphery of each conductive burring and is housed in a metal outer tube, slides the ends of the conductors into sliding contacts. A gas-insulated power transmission line that is electrically connected to each other, and the end portions of the metal outer tube are airtightly connected to each other to be elongated, and the insulating gas is sealed in the airtightly connected metal outer tube. In at least one of the connecting portions between the plurality of divided conductors with the conductive filler metal interposed therebetween, adjacent divided conductors are connected to the conductive filler metal by using a plurality of bolts penetrating the conductive filler metal in the axial direction. It is designed to fasten and fix the gold and the body together.

Further, the gas-insulated power transmission line according to the present invention comprises:
A plurality of divided conductors are connected in the axial direction with conductive shafts sandwiched therebetween with their respective axes aligned, and a conductive filler metal is fixed to the tip of the divided conductor on one side of the plurality of divided conductors. A plurality of power transmission path units, each of which has a conductor which is supported by a supporting insulator formed integrally with the outer periphery of each conductive burring and is housed in a metal outer tube, slides the ends of the conductors into sliding contacts. A gas-insulated power transmission line that is electrically connected to each other, and the end portions of the metal outer tube are airtightly connected to each other to be elongated, and the insulating gas is sealed in the airtightly connected metal outer tube. In at least one of the connecting points between the plurality of divided conductors with the conductive filler metal interposed therebetween, the conductive filler metal is divided into one by using a plurality of bolts penetrating the conductive filler metal in the axial direction. The conductor fixed integrally to the conductor and fixed to the one of the divided conductors Gold and other split conductors with sliding contacts for dividing the conductor connection is obtained so as to electrically connect.

Further, a large-diameter portion having an enlarged diameter of the metal outer tube is formed at each of the installation positions of the supporting insulator, and an impurity trapping device is provided at the large-diameter portion. .

The large-diameter portion is formed by enlarging the metal outer tube by a tube expansion method.

[0015] The conductive filler metal is provided with a large-diameter hole through which the plurality of bolts are inserted so as to penetrate in the axial direction.

[0016] The conductive filler metal is made of aluminum or aluminum alloy, and the bolt is made of aluminum alloy, copper alloy or stainless steel.

[0017] The conductive filler metal is made of aluminum or an aluminum alloy, the bolt is made of steel, and a disc spring having spring properties is used for a washer of the bolt.

Further, the connection between the conductor or the divided conductor and the conductive filler metal is performed by fastening a nut and a stud implanted in the conductor or the divided conductor.

Further, according to the method of assembling a transport unit for a gas-insulated power transmission line according to the present invention, there are provided a step of manufacturing first and second metal outer tubes each having one end having a large diameter portion; A conductive buried material whose object is integrally formed on the outer periphery is fastened and fixed to one end of the first divided conductor by a bolt penetrating the conductive buried metal, and the first divided conductor has a diameter of the first metal outer tube. A step of inserting the first supporting insulator to the large-diameter portion of the first metal outer tube, inserting the second supporting conductor into the second supporting insulator integrally with the outer periphery thereof; Fastening the other end of the first divided conductor with a bolt penetrating the conductive buried metal with the conductive buried metal interposed therebetween, and fixing the large-diameter portion of the second metal outer tube to the second support. The second split conductor is housed inside while sliding on the end of the insulator, and the large-diameter portion of the second metal outer tube is placed in the first metal outer tube. It is obtained by a step of connecting the ends of the genus outer tube.

In the method for assembling a transport unit for a gas-insulated power transmission line according to the present invention, the first metal outer tube whose both ends have large diameter portions and the large diameter portion of the first metal outer tube are excluded. Forming a second metal outer tube having the same diameter as that of the portion, and sandwiching a conductive filler metal integrally formed on the outer periphery with a second supporting insulator between the first and second divided conductors; A step of fastening and integrating the first and second divided conductors with bolts penetrating the buried metal, and a step of connecting the first divided conductor integrated with the second divided conductor to the first metal outer tube. Inserting the second support insulator on the other large-diameter portion of the first metal outer tube and slidingly supporting the second support insulator; Gold is applied to the tip of the first divided conductor, and the conductive embedded metal is applied to the first divided conductor by a bolt penetrating the conductive embedded metal. Fixing and fixing the first supporting insulator to the large-diameter portion on one side of the first metal outer tube; and integrating the second metal outer tube with the first split conductor. A step of housing the second split conductor and connecting the second split conductor to the other large-diameter portion of the first metal outer tube.

Further, according to the method of assembling a unit for transporting a gas-insulated power transmission line according to the present invention, there are provided a step of manufacturing first and second metal outer tubes each having one end having a large diameter, A conductive buried material whose object is integrally formed on the outer periphery is fastened and fixed to one end of the first divided conductor by a bolt penetrating the conductive buried metal, and the first divided conductor has a diameter of the first metal outer tube. A step of inserting the first supporting insulator to the large-diameter portion of the first metal outer tube, inserting the first supporting insulator into the large-diameter portion of the first metal outer tube; The second divided conductor is fastened and fixed to one end of the second divided conductor by a bolt penetrating the conductive metal filling, and the second divided conductor is inserted from the large diameter side of the second metal outer tube,
Fixing a second supporting insulator to the large-diameter portion of the second metal outer tube, fitting a sliding contact for connecting the divided conductor to the conductive filling metal; Moving contact
The large-diameter portion of the second metal outer tube is fitted to the other end of the first metal outer tube while being fitted to the divided conductor, and the large-diameter portion of the second metal outer tube is fitted to the first metal outer tube. Connecting to the other end of the metal outer tube.

Further, the connecting structure for conductors according to the present invention has a hollow cylindrical shape having a connecting wall at an end, a bolt insertion hole is formed in the connecting wall, and a bolt fastening work opening is provided. The ends of the first conductor drilled in the outer periphery and the second conductor provided with screw holes at the ends are butted directly or with a conductor interposed therebetween, and a hand is inserted through the bolt fastening opening. A bolt is fastened to the screw hole of the second conductor from the inside of the hollow portion of the first conductor through a bolt insertion hole provided in the connection wall, thereby connecting the first and second conductors together. In the connection structure, an annular groove is provided on the inner peripheral surface to form an annular shape, and the annular shield is mounted on the first conductor so as to be slidable in the axial direction and opens and closes the bolt fastening work opening. A small hole formed in the first conductor; A contactor having a spring property attached to the inner wall surface of the hollow portion of the first conductor so as to extend outward from the hole, and at the time of bolting work, the shield is slid to perform the bolting work. Open the opening,
After the bolt tightening operation is completed, the shield is slid to close the bolt tightening operation opening, and the tip of the contact extending from the small hole is subjected to the engagement using the spring force of the contact. The shield is prevented from moving by being fitted in the mating groove, and the shield and the first conductor are kept at the same potential.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a sectional view showing a main part of a gas-insulated power transmission line according to Embodiment 1 of the present invention, and FIG.
FIG. 11 is a cross-sectional view taken along the arrow II.
The same or corresponding parts as those of the conventional gas-insulated power transmission line shown in FIG.

In FIGS. 1 and 2, the supporting insulator 3a as the first supporting insulator has a conical shape or a disk shape, and is formed by casting using an epoxy resin containing a filler. It is molded integrally. A plurality of holes 3m parallel to the axial direction are drilled in the circumferential direction in the conductive metal filling 3g. Similarly, the supporting insulator 3b as the second supporting insulator is in the form of a tripod, and is integrally formed on the outer periphery of the conductive metal filling 3h by casting using an epoxy resin containing a filler. A hole 3 parallel to the axial direction is formed in the conductive metal 3h.
n are formed in the circumferential direction. At both ends of the metal outer tube 1a, enlarged tube diameter portions 1h and 1m are formed. The enlarged-diameter portion 1h at one end is formed by welding a metal ring to the end of the outer metal tube 1a, and the enlarged-diameter portion 1m at the other end is expanded by applying force from inside the outer metal tube 1a. It is formed by enlarging the tube diameter by the method. Then, the connection ring 5a is welded to the enlarged-diameter portion 1h at the welded portion C and is integrally connected to the outer metal tube 1a. The supporting insulator 3a and the perforated electrodes 14a and 14b are housed in the connection ring 5a. At both ends of the metal outer tube 1b, enlarged tube diameter portions 1g and 1n are formed. The enlarged-diameter portion 1g is formed by welding a metal ring to an end of the outer metal tube 1b, and the enlarged-diameter portion 1n is formed by enlarging the diameter of the outer metal tube 1b by an expanding method. And
The outer metal tube 1b is welded at the welded portion B by covering the expanded tube portion 1n with the expanded tube portion 1m of the outer metal tube 1a.
a. The supporting insulator 3b and the perforated electrode 14c are housed in the enlarged tube diameter portion 1n. The connecting ring 5a of the metal outer tube 1a and the metal outer tube 1
The enlarged tube diameter portion 1n of b constitutes a large diameter portion.

One end of the conductive filler metal 3g is addressed to the end of the conductor 2a as the first split conductor, the shield 8 is addressed to the other end of the conductive filler metal 3g, and the conductive A bolt 16 passing through a hole 3m formed in the buried metal 3g is fastened to a screw hole provided at an end of the conductor 2a and connected to the conductor 2a. The shield 8 is fastened together, but may be fixed separately. The supporting insulator 3a integrally formed with the conductive metal filling 3g has an end portion connected to the connecting ring 5a.
a, the holding portion 10 is addressed to the end from the opposite side, and the holding portion 10 and a bolt 18 passing through a hole formed in the end are provided on the protrusion 9. It is fastened to the screw hole and connected to the connection ring 5a. And the supporting insulator 3
A gasket 11 such as an O-ring is interposed between the end of the conductor a and the protrusion 9, and a gasket 19 such as an O-ring is interposed between the conductive filler metal 3 g and the end of the conductor 2 a. The airtightness is maintained between the left and right insulating gases of the supporting insulator 3a. The perforated electrodes 14a and 14b are made of cylindrical metal and provided with a large number of slit-shaped holes at the lower portion, and are attached to the protrusion 9 and the holding portion 10 so as to be located on the left and right sides of the supporting insulator 3a. Therefore, the connecting ring 5a has an inner diameter of the metal outer tube 1a.
Therefore, a concavity is formed, and the impurity trapping device 15 is formed together with the perforated electrodes 14a and 14b. A sliding contact 6 is slidably fitted to a thinly protruding projection on the other end side of the conductive filling 3g. The guide rod 27 is fastened to a screw hole provided in the convex part on the other end side of the conductive filler metal 3g, thereby improving the concentricity between the contact surfaces on both sides of the bridging contact 6 to facilitate assembly. ing.

The conductive filler metal 3h has one end addressed to the end of the conductor 2a, the end of the conductor 2b as the first split conductor addressed to the other end of the conductive filler 3h, From the side, a bolt 17 passing through a hole provided at the end of the conductor 2b and a hole 3n drilled in the conductive filler metal 3h is fastened to a screw hole provided at the end of the conductor 2a by tightening. Are connected integrally. The conductor 2b is provided with a hole 23 at an end thereof, and an opening 24 for bolt fastening work on an outer peripheral surface on the end side. Then, when connecting the conductive filler metal 3h, the bolt 17 is inserted into the conductor 2b through the hole 23, and the hand is inserted through the bolt fastening opening 24 to connect the bolt 17 to the conductor 2b.
The bolt 17 is further passed through a hole provided at the end of the hole b and a hole 3n formed in the conductive filling metal 3h so that the bolt 17 can be further tightened. After the bolt 17 is tightened, the annular shield 25 is displaced to cover the bolt tightening work opening 24, and a small screw 26 provided in a small hole with a rounded edge is provided.
This secures the shield 25 to the conductor 2b. In this case, it is desirable to insulate the portion other than the vicinity of the small screw 26 between the conductor 2b and the shield 25 to eliminate the possibility of shunting at the time of a large current. In the other end of the conductor 2b, a hole for fitting the guide rod 27 is provided at an axial position, and an annular groove for slidably and conductively connecting the sliding contact 6 is formed. It is provided coaxially with the hole. The perforated electrode 14c is made of a cylindrical metal and is provided with a number of slit-shaped holes at a lower portion thereof.
m, 1n. Therefore, the pipe diameter enlarged section 1m,
1n constitutes a concave portion because the inner diameter is enlarged with respect to the metal outer tubes 1a and 1b, and constitutes the impurity capturing device 15 together with the perforated electrode 14c.

At the tip of each leg of the tripod-type supporting insulator 3b, a leg end electrode 3p is provided. A sliding contact 20 (corresponding to the sliding portion 4 in FIG. 11) urged radially outward by a spring is accommodated inside the upper leg end electrode 3p. Is brought into contact with the inner wall surface of the enlarged tube diameter portion 1n, so that the leg end electrode 3p and the enlarged tube diameter portion 1
n are kept at the same potential. Further, the lower two leg end electrodes 3p may be provided with a sliding portion similarly to the upper leg end electrode 3p. The insulator 21 is attached to secure the slidability with the enlarged-tube-diameter portion 1n, and further connected to the upper leg-end electrode 3p by the conductive band 22 to increase the enlarged-diameter tube portion 1n.
And the same potential.

The transport unit 10 constructed as described above
In order to assemble the outer ring 1a, first connect the connecting ring 5a to the outer metal tube 1a.
Is welded to the enlarged tube diameter portion 1h at the welded portion C to integrate the connecting ring 5a and the outer metal tube 1a. A perforated electrode 14b is attached to the projection 9 of the connection ring 5a.
Next, the conductive filler metal 3 formed integrally with the supporting insulator 3a
gasket 1 with bolt 16 together with shield 8
9 and fastened to the end of the conductor 2a. Then, the conductor 2a integrated with the support insulator 3a is put into the metal outer tube 1a integrated with the connection ring 5a, and the holding portion 10 to which the perforated electrode 14a is attached is attached to the outer peripheral edge of the support insulator 3a. Then, the bolt 18 is fastened to the protrusion 9 on which the gasket 11 is mounted to fix the support insulator 3a to the connection ring 5a. At this time, the right end of the conductor 2a in FIG.
A support tool (not shown), for example, divided into upper and lower parts, which is kept concentric with the metal outer tube 1a and can be removed later.
It is fixed using. Thereby, even if a bending moment is applied to the support insulator 3a during the connection work, it is possible to prevent a situation that causes damage to the support insulator 3a.

Next, a support insulator 3b is provided at the right end of the conductor 2a.
And a conductive bur 3h formed integrally with the conductor 2
The left end of b is placed on the conductive metal 3h, and the bolts 17 passing through the holes 3n are tightened to connect the conductors 2a and 2b with the conductive metal 3h interposed therebetween. At this time, the bolt 17 is connected to the conductor 2b through the hole 23.
The bolt 17 is inserted into the end of the conductor 2b by inserting a hand or a tool through the bolt opening 24 widely opened by displacing the shield 25 by shifting the shield 25 in advance. The bolt 17 is passed through the hole provided and the hole 3n formed in the conductive metal filling 3h, and the bolt 17 is further tightened into a screw hole provided at the end of the conductor 2a. Thereafter, the shield 25 is shifted to cover the bolt fastening opening 24, and the shield 25 is fixed to the conductor 2b by a small screw 26 having a rounded head, and is electrically connected. Finally, the perforated electrode 1
4c is a metal outer tube 1b attached to the enlarged tube diameter portion 1n
Is moved from the right side of FIG. 1 so as to accommodate the conductor 2b, and the enlarged pipe diameter portions 1n and 1m are welded at the welded portions B to assemble one transport unit 100. At this time, a sliding contact 20 is previously attached to the leg end electrode 3p of the support insulator 3b, and the leg end electrode 3p is electrically connected to the enlarged tube diameter portion 1n via the sliding contact 20. ing. The supporting insulator 3b is slidably supported by the enlarged tube diameter portion 1n.

The transport unit 100 (portion shown by a solid line in FIG. 1) assembled in this way is transported to the site, and a predetermined number of units are connected at the site to form a long gas-insulated power transmission line. Will be. That is, at the site, a gasket 12 such as an O-ring is fitted to the enlarged-diameter portion 1g of one transport unit 100 (indicated by a dashed line in FIG. 1), and then this transport unit 100 is transported to another transport unit. 1 for the unit 100 (shown by a solid line in FIG. 1).
From the middle left, the enlarged tube diameter portion 1g is fitted into the connection ring 5a, and the two transport units are connected by welding at the welding portion A. At this time, the guide rod 27 fastened to the conductive filler metal 3g is fitted into a hole provided at the end of the conductor 2b, and the concentricity between the contact surfaces on both sides of the sliding contact 6 bridging is set. As a result, the bridging of the sliding contact 6 is performed smoothly. In this way, a predetermined number of the transport units 100 are sequentially connected and filled with an insulating gas to form a long gas-insulated power transmission path. After sealing the insulating gas, a conditioning operation is performed to remove impurities such as metal flakes that adversely affect the withstand voltage performance from the insulating gas, and the installation is completed. In this conditioning operation, the voltage is gradually increased and held for a certain period of time, and this operation is repeated until the voltage becomes equal to or higher than the voltage applied during operation. At this time, the perforated electrodes 14a, 14b, the connection ring 5a and the metal outer tube 1
a, a low electric field is applied between the ends of the electrodes 14a and 1b, and the perforated electrode 14
A low electric field is also generated between c and the outer metal tubes 1a and 1b. Therefore, the metal fine pieces existing in the metal outer tubes 1a and 1b move in the metal outer tubes 1a and 1b while jumping by the applied voltage, and finally, the slit-like shape of the perforated electrodes 14a, 14b, and 14c. Holes and recesses (parts of the connecting ring 5a and the enlarged tube diameter portion 1n
Part). Then, the metal fine pieces that have fallen into the slit-shaped holes or concave portions of the perforated electrodes 14a, 14b, and 14c that have a low electric field cannot be jumped again and are trapped, that is, trapped.

As described above, according to the first embodiment,
The supporting insulator 3b is integrally formed on the outer periphery of the conductive metal filling 3h by casting using an epoxy resin containing a filler, and the conductive metal filling 3g is sandwiched between the conductors 2a and 2b.
The conductors 2a and 2b are tightened and connected by bolts 17 passed through holes 3n formed in the hole 3n, and furthermore, a supporting insulator 3a is formed on the outer periphery of the conductive metal filling 3g by casting using an epoxy resin containing a filler. Are molded integrally, and 3 g of the conductive metal
a, the conductive filler metal 3g is fastened and connected to the conductor 2a by a bolt 16 passed through a hole 3m formed in the conductive filler metal 3g, and the supporting insulator 3a applied in the transport unit 100 , 3b are producing integrated conductors. Therefore, welding work that easily generates contaminants such as spatters that are not desired to be applied to the inside of gas-insulated equipment that is susceptible to fouling is eliminated from the manufacturing process of the conductor in which the supporting insulating material housed in the metal outer tube is integrated, Deterioration of the insulation performance of the gas insulation device can be significantly reduced.

Here, 3 g of conductive burring using bolts, 3
As a method for connecting the conductors 2a and 2b with the conductors 2a and 2b, a method is conceivable in which screw holes are provided on both end faces of the conductive burials 3g and 3h and bolts are fastened from both sides. That is, in the connection between the conductive filler metal 3g and the conductor 2a, a bolt is passed from the inside of the conductor 2a to a hole provided on the end face of the conductor 2a.
g, and the conductive filler metal 3g and the conductor 2a are connected to each other. Further, a bolt is passed through a hole provided in the shield 8, and the conductive filler metal 3g and the shield 8 are fastened to the conductive filler metal 3g. Will be connected. In this case, as the number of bolts increases, it becomes necessary to provide a hole for inserting a hand or a tool for fastening the bolt in the conductor 2a, similarly to the conductor 2b, and to provide a shield for closing the hole. I will. On the other hand, conductive buried 3h
In connecting the conductors 2a and 2b, the bolts are connected to the conductors 2a and 2b.
a, 2b from the inside through holes provided in the end faces of the conductors 2a, 2b, respectively, and fasten to the conductive metal 3h by
h and the conductors 2a and 2b. In this case, as the number of bolts increases, it becomes necessary to provide a hole for inserting a hand or a tool for fastening the bolt in the conductor 2a, similarly to the conductor 2b, and to provide a shield for closing the hole. I will. However, in the first embodiment, the holes 3m and 3n penetrating through the conductive filler metal 3g and 3h are provided, and the bolts 16 and 17 are inserted through the holes 3m and 3n so that the bolts 16 and 17 are fastened from one side. Compared to the above connection method, it is possible to reduce the number of bolts, to provide a hole for inserting a hand or a tool for fastening the bolt on the conductor 2a, and to provide a shield for closing the hole. Is very economically advantageous.

Further, since the conductors 2a and 2b are connected by the bolts 17 with the conductive filler metal 3h interposed therebetween, the number of connection points by the sliding contacts 6 is reduced, and the cost is reduced and good current is supplied. Performance is obtained. In addition, the sliding contact 6 and the shield 8 for alleviating the electric field of the conductive filler metal 3g of the supporting insulator 3a also function as the electric field of the head of the bolt 16;
This is advantageous in terms of withstand voltage performance and economically. Further, since the impurity trapping devices 15 are provided at all the places where the supporting insulators 3a and 3b are installed, the impurities that have reached the vicinity of the supporting insulators 3a and 3b during the conditioning work are surely transferred to the impurity trapping device 15. It can be captured and the insulation performance can be improved. That is, in the related art, the impurity trapping device is not provided for some of the supporting insulators. Therefore, during the conditioning operation, the impurities jump and move below the supporting insulator where the impurity trapping device 15 is not provided. In the first embodiment, the impurity trapping device 15 is provided for all the supporting insulators. In addition, the adhesion of impurities to the supporting insulator that leads to such dielectric breakdown is prevented. Also, a metal outer tube 1a is provided with a tube diameter enlarged portion 1m, a metal outer tube 1b is provided with a tube diameter enlarged portion 1n, and a tube diameter enlarged portion 1m, 1m
Since n is welded together and the metal outer tubes 1a and 1b are connected and integrated, a large-diameter portion where the impurity trapping device 15 can be installed can be easily formed at the center of the metal outer tube. In this type of gas-insulated power transmission line, the installation interval of the supporting insulating portion that supports the conductor is determined by restrictions on electrical characteristics. Therefore, by configuring the large-diameter portion at the position where the supporting insulator of the metal outer tube is installed, the impurity trapping device 15 can be provided at all positions where the supporting insulator is installed. The interval becomes shorter. If the installation interval between the supporting insulators is constant, in the first embodiment, the installation interval of the impurity trapping device 15 is halved compared to the related art, and the conditioning time can be greatly reduced. In addition, since the enlarged-diameter portions 1m and 1n are formed by the enlarging method, the large-diameter portion can be formed inexpensively, and the cost can be reduced.

Here, the bolts 16 and 17 have a considerably long fastening portion, and the temperature change due to energization and natural environment is large. It is desirable to use a material whose thermal expansion coefficient is close to that of the conductive filler metal 3g, 3h.
For example, when the conductive fillers 3g and 3h are made of aluminum or an aluminum alloy, the bolts 16 and 17 are preferably made of an aluminum alloy, a copper alloy or stainless steel. When the bolts 16 and 17 are made of steel, it is preferable to use a disc spring having a spring property for the washer.

In the first embodiment, the bolt 1
Reference numerals 6 and 17 denote holes 3m and 3m formed in the conductive filler metal 3g and 3h.
n, and is fastened to a screw hole provided at the end of the conductor 2a. Bolts are implanted at both ends of the conductor 2a, and the implanted bolts (implanted bolts) are
Alternatively, a nut may be screwed to the tip protruding into the outside of the conductive filler metal 3g and the inside of the conductor 2b through m and 3n, and may be connected by fastening the stud and the nut. In this case, the hole 23 provided in the conductor 2b for inserting the bolt 17 becomes unnecessary, and the cost can be reduced accordingly. In the first embodiment, when connecting the transport units 100 on site, the enlarged-diameter portion 1g is welded to the connection ring 5a, but the ends of the connection ring 5a and the metal outer tube 1b are connected. A flange may be provided in the portion, the airtightness may be maintained with a gasket, and the connection may be made using bolts.
In this case, it is particularly effective when the site is a place where welding work is difficult such as in a narrow cave or a high place.

Embodiment 2 In the second embodiment, as shown in FIG. 3, a metal ring is welded to the right end of the metal outer tube 1a in the drawing and the left end of the metal outer tube 1b in the drawing to form the pipe diameter enlarged portions 2h and 2g. , The both ends of the connection ring 5b are welded to the enlarged tube diameter portions 2h and 2g, respectively, so that the metal outer tubes 1a and 1
b are integrated via a connecting ring 5b. The connecting ring 5b forms a large-diameter portion and houses the impurity capturing device 15. A small hole 28 having a rounded edge is formed in the shield 25, and a fastening tool is inserted through the small hole 28 to fasten the small screw 26 from the inside of the conductor 2b to fix the shield 15. I have to. The other configuration is the same as that of the first embodiment.

The transport unit 10 constructed as described above
In order to assemble 1, first, a metal ring is welded to both ends of a metal outer tube 1 a to form enlarged tube diameter portions 1 h and 2 h, and similarly, a metal tube is welded to both ends of a metal outer tube 1 b to enlarge the tube diameter. Part 1g,
Form 2 g. After that, the connection rings 5a, 5b are welded to the enlarged-diameter portions 1h, 2h of the metal outer tube 1a at the welded portions C, respectively, so that the connection rings 5a, 5b and the metal outer tube 1a are integrated.
The projection 9 of the connecting ring 5a is provided with a perforated electrode 14
b is attached, and a perforated electrode 14c is attached to the connection ring 5b.
Is attached.

Next, a supporting insulator 3 is provided on the right end face of the conductor 2a.
b, and the left end face of the conductor 2b is applied to the conductive filler metal 3h, and the bolt 17 passing through the hole 3n is tightened so that the conductors 2a and 2b are sandwiched by the conductive filler metal 3h. Connect and integrate. At this time, the bolt 17 is inserted in advance in the vicinity of the bolt fastening work opening 24 in the conductor 2b from the hole 23, and the hand or tool is inserted through the bolt fastening work opening 24 widely opened by displacing the shield 25. Then, the bolt 17 is inserted into the hole provided at the end of the conductor 2b and the conductive
h, and the bolt 17 is further tightened into a screw hole provided at the end of the conductor 2a. afterwards,
The shield 25 is shifted to cover the bolt fastening opening 24, a fastening tool is inserted through a small hole 28 provided in the shield 25, and the small screw 26 is tightened to fix the shield 25 to the conductor 2b and electrically. Connecting. Then, the conductive band 22 and the sliding contact 20 are attached to the leg end electrode 3p of the supporting insulator 3b. Next, the conductors 2a and 2b integrated with the conductive burying metal 3h interposed between the metal outer tube 1 and the right side in the figure.
Put in a. At this time, the leg end electrode 3p of the support insulator 3b
Are electrically connected to the inner wall surface of the connection ring 5b via the sliding contact 20. Then, a conductive filler metal 3g formed integrally with the supporting insulator 3a is bolted together with the shield 8 to the bolt 16
Then, the gasket 19 is interposed between the conductor 2a and the conductor 2a. Further, the holding portion 10 to which the perforated electrode 14a is attached is applied to the outer peripheral edge of the support insulator 3a, and the bolt 18 is fastened to the protrusion 9 on which the gasket 11 is mounted, thereby fixing the support insulator 3a to the connection ring 5a. I do. At this time, the right end of the conductor 2a is supported by the connection ring 5b via the supporting insulator 3b so as to be movable in the circumferential direction and the axial direction and concentrically with the metal outer tube 1a. Even if a bending moment is applied to the supporting insulator 3a,
A situation that may cause damage to the supporting insulator 3a can be prevented.

Further, the outer metal tube 1b is moved from the right side of FIG. 3 so as to accommodate the conductor 2b, and the enlarged tube diameter portion 2g on which the gasket 12 is mounted is welded to the connection ring 5b at the welding portion B to form one tube. The transport unit 101 is assembled.

The transport unit 101 assembled in this way is transported to the site, and a predetermined number of units are connected at the site to form a long gas-insulated power transmission line. That is, at the site, a gasket 12 such as an O-ring is fitted to the enlarged tube diameter portion 1g of one transport unit 101, and then this transport unit 101 is placed on the other transport unit 101 on the left side in FIG. Then, the tube diameter enlarged portion 1g is fitted into the connection ring 5a, and the two transport units 101 are connected by welding at the welding portion A. At this time, the guide rod 27 fastened to the conductive filler metal 3g is fitted into a hole provided at the end of the conductor 2b, and the concentricity between the contact surfaces on both sides of the sliding contact 6 bridging is set. As a result, the bridging of the sliding contact 6 is performed smoothly. In this way, a predetermined number of the transport units 101 are sequentially connected and filled with an insulating gas to form a long gas-insulated power transmission path. After sealing the insulating gas, a conditioning operation is performed to remove impurities such as metal flakes that adversely affect the withstand voltage performance from the insulating gas, and the installation is completed.

As described above, according to the second embodiment,
In addition to the effects of the first embodiment, after the conductors 2a and 2b are connected and integrated with the supporting insulator 3b via a conductive metal mold 3h formed integrally therewith, the conductors 2a of the integrated conductors 2a and 2b are integrated. The metal ring 5a, 5b is inserted into the metal outer tube 1a welded to both ends, so that the conductive ring 3g formed integrally with the supporting insulator 3a is connected to the conductor 2a from the connection ring 5a side. Therefore, the supporting insulator 3b is slidably supported by the connecting ring 5b, and two upper and lower insulators are necessary to prevent a large bending moment from being applied to the supporting insulator 3a during assembly in the first embodiment. The need for a split support tool is eliminated, and assemblability is improved.

Embodiment 3 In the first embodiment, for the purpose of monitoring and maintaining the gas pressure during filling of the insulating gas or during operation, and furthermore, in the event of an accident, etc., the airtight isolation part is formed using the conical supporting insulator 3a for gas division. In the third embodiment, the present invention is applied to a unit that does not perform gas division in consideration of economy. That is,
In the third embodiment, as shown in FIG. 4, both ends of the metal outer tubes 1a and 1b are increased in diameter by an expansion method so as to be enlarged diameter portions 1n and 1m, and the supporting insulators 3a and 3b are formed. Both are of tripod type. And metal mounting bracket 2
8, one end is fixedly fastened to the inner wall surface of the enlarged-diameter portion 1n of the metal outer tube 1a by a bolt 30, and the supporting insulator 3a is fixedly fastened to the other end of the mounting bracket 28 by the bolt 29 at the other end of the mounting bracket 28. Is housed in the enlarged tube diameter portion 1n. The enlarged-diameter portions 1n of the metal outer tubes 1a and 1b constitute a large-diameter portion.
The other configuration is the same as that of the first embodiment.

The transport unit 10 constructed as described above
In order to assemble 2, first, both ends of the metal outer tubes 1 a and 1 b are enlarged by a tube expansion method to increase the tube diameter.
m, 1n are formed. Then, the perforated electrode 14c is attached to each of the outer diameter portions 1n of the outer metal tubes 1a and 1b. Further, the metal mounting bracket 28 is used as the supporting insulator 3a.
Is fixedly fastened to the leg end electrode 3p by a bolt 29. Then, a conductive filler metal 3g formed integrally with the supporting insulator 3a.
Is applied to the left end surface of the conductor 2a, and the shield 8 is
Then, the bolt 16 is passed through a hole drilled in the shield 8 and a hole 3m drilled in the conductive filler metal 3g, and tightened and fixed to a screw hole provided at the end of the conductor 2a. Then, the integrated support insulator 3a and conductor 2a are inserted from the left side of the metal outer tube 1a. However, the work of fastening the fixing fitting 28 fixed to the leg end electrode 3p to the enlarged tube diameter portion 1n with a bolt 30 to make the leg electrode 3p the same potential as the enlarged tube diameter portion 1n is performed last. Good. Even if a bending moment is applied to the conductor 2a during the connection operation, it is possible to prevent a situation in which the conductor 2a slides at the mounting bracket 28 and damages the support insulator 3a.

Next, a support insulator 3b is provided at the right end of the conductor 2a.
And a conductive bur 3h formed integrally with the conductor 2
The left end of b is placed on the conductive metal 3h, and the bolts 17 passing through the holes 3n are tightened to connect the conductors 2a and 2b with the conductive metal 3h interposed therebetween. At this time, the bolt 17 is connected to the conductor 2b through the hole 23.
The bolt 17 is inserted into the end of the conductor 2b by inserting a hand or a tool through the bolt fastening work opening 24 which is widely opened by shifting the shield 24 by putting the bolt 17 in advance in the vicinity of the bolt fastening work opening 24 in the inside. The bolt 17 is passed through the hole provided and the hole 3n formed in the conductive metal filling 3h, and the bolt 17 is further tightened into a screw hole provided at the end of the conductor 2a. Thereafter, the shield 25 is shifted to cover the bolt fastening opening 24, and the shield 25 is fixed to the conductor 2b by a small screw 26 having a rounded head, and is electrically connected. Next, the metal outer tube 1b
Is moved from the right side of FIG. 4 so as to house the conductor 2b, and the enlarged pipe diameter portions 1n and 1m are welded at the welded portion B, whereby one transport unit 102 is assembled. At this time, a sliding contact 20 is previously attached to the leg end electrode 3p of the support insulator 3b, and the leg end electrode 3p is electrically connected to the enlarged tube diameter portion 1n via the sliding contact 20. ing.

The transport unit 102 assembled as described above is transported to the site, and a predetermined number of units are connected at the site to form a long gas-insulated power transmission line. That is, at the site, after the gasket 12 is fitted to the pipe diameter enlarged portion 1m of one transport unit 102, this transport unit 102 is connected to the other transport unit 102.
4 from the left side in FIG.
n and transport unit 1 by welding at weld A
02 is connected. At this time, the guide rod 27 fastened to the conductive filler metal 3g is fitted into a hole provided at the end of the conductor 2b, and the concentricity between the contact surfaces on both sides of the sliding contact 6 bridging is set. As a result, the bridging of the sliding contact 6 is performed smoothly. In this way, a predetermined number of the transporting units 102 are sequentially connected and filled with an insulating gas to form a long gas-insulated power transmission path. After sealing the insulating gas, a conditioning operation is performed to remove impurities such as metal flakes that adversely affect the withstand voltage performance from the insulating gas, and the installation is completed.

As described above, in the third embodiment, the gas cannot be classified, but the other effects are the same as those of the first embodiment. Further, since the supporting insulator 3a is of a tripod type, the unit is lightweight, easy to assemble, and inexpensive.

In the third embodiment, each leg end electrode 3p of the supporting insulator 3a is fixedly fastened to the fitting 28 fixed to the enlarged tube diameter portion 1n by the bolt 29. Each leg end electrode 3p of the object 3a is connected to the conductive band 22.
And one or two of the leg end electrodes 3p may be fastened and fixed to the mounting bracket 28 with bolts 29. In addition, the conductor 2 is sandwiched between the conductive burs 3h.
When the bolts 17 are integrated by tightening the conductors 2b
Although the bolt 17 is fastened to the conductor 2a from the side through the hole 3n, the bolt 17 may be fastened to the conductor 2b from the conductor 2a through the hole 3n. In this case, the conductor 2a
It is necessary to provide a hole (corresponding to the hole 23) for previously inserting the bolt 17 and a hole (corresponding to the opening 24 for bolt tightening) of the bolt 17 and a screw hole in the conductor 2b. . In the third embodiment, the enlarged-diameter portion 1n for accommodating the supporting insulator 3b is formed in the outer metal tube 1b. However, the enlarged-diameter portion 1m formed in the outer metal tube 1a is enlarged. The tube is enlarged to have a large diameter
The supporting insulator 3b may be stored in m. In this case, the conductive filler metal 3h formed integrally with the supporting insulator 3b
After the conductors 2a and 2b are tightened and integrated with the bolt 17 with the interposition therebetween, the conductor 2a is inserted into the metal outer tube 1a from the right side, and the conductor 2a
, The conductive filler metal 3g and the shield 8 are fastened and integrated with the bolt 16. At this time, the leg end electrode 3p of the supporting insulator 3b is in contact with the inner wall surface of the enlarged tube diameter portion 1m via the sliding contact 20, so that the right end of the conductor 2a can move in the circumferential direction and the axial direction. In addition, it is supported by the enlarged-diameter portion 1m via the supporting insulator 3b and concentrically with the metal outer tube 1a, so that an excessive bending moment is not applied to the supporting insulators 3a and 3b during the connection work.

Embodiment 4 In the fourth embodiment, as shown in FIG. 5, the right ends of conductors 2a and 2b are provided with holes for fitting guide rods 27 at axial positions, and sliding contacts 6 slide. An annular groove is provided coaxially with the hole for possible conductive connection. The supporting insulator 3a has a tripod shape, and is formed integrally with the outer periphery of the conductive metal filling 3g by casting using an epoxy resin containing a filler. A plurality of holes 3m, which are parallel to the axial direction, are formed in the conductive metal filling 3g in the circumferential direction. ing.
Similarly, the supporting insulator 3b also has a tripod shape, and is integrally formed on the outer periphery of the conductive metal bur 3h by casting using an epoxy resin containing a filler. A plurality of holes 3n, which are parallel to the axial direction, are formed in the conductive metal filling 3h in the circumferential direction. The part protrudes. The conductor 2a and the conductor 2b are connected via the sliding contact 6. The other configuration is the same as that of the third embodiment.

The transport unit 10 constructed as described above
In order to assemble the pipe 3, first, both ends of the metal outer pipes 1 a and 1 b are enlarged by a pipe expansion method to increase the pipe diameter.
m, 1n are formed. Then, the perforated electrode 14c is attached to each of the outer diameter portions 1n of the outer metal tubes 1a and 1b. Further, the metal mounting bracket 28 is used as the supporting insulator 3a,
3b is fixedly fastened to the leg end electrode 3p by a bolt 29,
Furthermore, each leg end electrode 3p is connected to each other using the conductive band 22. Then, a conductive filler metal 3g formed integrally with the supporting insulator 3a is applied to the left end face of the conductor 2a, the shield 8 is applied to the conductive filler metal 3g, and a bolt 16 is formed in the shield 8 by a hole formed in the shield 8. 3g through the hole 3m drilled in the conductor 2a
Tighten and fix to the screw holes provided at the ends of the. Then, the integrated support insulator 3a and conductor 2a are inserted from the left side of the metal outer tube 1a. The mounting bracket 28 fixed to the leg end electrode 3p is fastened and fixed to the enlarged tube diameter portion 1n with a bolt 30.
The operation of setting the leg end electrode 3p to the same potential as the tube diameter enlarged portion 1n is as follows.
It is best to do it last. No excessive moment is applied to the supporting insulator during work. In addition, the sliding contact 6 is fitted to the convex portion of the conductive metal filling 3g. Also, a conductive filler metal 3h formed integrally with the supporting insulator 3b is applied to the left end surface of the conductor 2b,
The shield 8 is applied to the conductive metal 3h, and the bolt 17 is bored in the shield 8 and the hole 3n is formed in the conductive metal 3h.
, And tightened and fixed in a screw hole provided at the end of the conductor 2b. Then, the integrated support insulator 3b and conductor 2b are inserted from the left side of the outer metal tube 1b. The mounting bracket 28 fixed to the leg end electrode 3p is bolted to the tube diameter enlarged portion 1n with a bolt 30.
The operation of fixing the leg end electrode 3p to the same potential as that of the enlarged tube diameter portion 1n is preferably performed last. In addition, the sliding contact 6a is fitted to the convex portion of the conductive metal filling 3h. At this time, conductor 2
The right ends of a and 2b are kept concentric with the metal outer tubes 1a and 1b, and are fixed by using a support tool (not shown) that can be removed later, for example, divided into upper and lower parts. It is safe. Thus, even if a bending moment is applied to the supporting insulators 3a and 3b during the connection work, it is possible to prevent a situation that may cause damage to the supporting insulators 3a and 3b.

Finally, the metal outer tube 1 containing the conductor 2a
Metal outer tube 1 in which conductor 2b is accommodated in expanded tube diameter portion 1m
One transport unit 103 is assembled by welding the pipe diameter enlarged portion 1m of the portion b at the welding portion B. At this time, the conductive deposit 3
h is fixed to the hole provided at the end of the conductor 2a, and the sliding contact 6a fitted to the protrusion provided on the conductive metal filling 3h is connected to the conductor 2a. Are fitted in an annular groove provided at the end of the conductor 2a, and the conductors 2a and 2b are electrically connected.

The transport unit 103 assembled in this manner is transported to the site, and a predetermined number of units are connected at the site to form a long gas-insulated power transmission path. That is, at the site, after the gasket 12 is fitted to the pipe diameter enlarged portion 1m of one transport unit 103, the transport unit 103 is connected to the other transport unit 103.
5 from the left side in FIG.
n and transport unit 1 by welding at weld A
03 is connected. At this time, the guide rod 27 fastened to the conductive filler metal 3g is fitted into a hole provided at the end of the conductor 2b, and the concentricity between the contact surfaces on both sides of the sliding contact 6 bridging is set. As a result, the bridging of the sliding contact 6 is performed smoothly. In this way, a predetermined number of the transport units 103 are sequentially connected and filled with an insulating gas to form a long gas-insulated power transmission path. After sealing the insulating gas, a conditioning operation is performed to remove impurities such as metal flakes that adversely affect the withstand voltage performance from the insulating gas, and the installation is completed.

According to the fourth embodiment, the conductor 2a is supported by the supporting insulator 3g and housed in the metal outer tube 1a.
The conductor 2b is supported by the support insulator 3h and housed in the metal outer tube 1b, and then the conductors 2a and 2b are
a, and the metal outer pipes 1a, 1b are welded and integrated at the welding portion B to assemble the transport unit 103, so that the assemblability of the unit can be improved. Further, in the fourth embodiment, one transport unit has two transport units.
Although the two sliding contacts 6 and 6a are required, the holes 23 and the bolt fastening work openings 24 and the bolt fastening work openings 24 provided in the conductor 2b, which are required in each of the above embodiments, are provided. The shield 25 for closing is not required, and assemblability can be improved accordingly.

Here, when the conductor is large in the gas-insulated power transmission line for high voltage or large current, the installation interval of the supporting insulator can be lengthened. If the distance between the supporting insulators is long and the length of the transport unit exceeds the transport limit when the conductor is supported by the two supporting insulators, the conductor 2a in the pre-stage to be welded at the welding portion B in the factory is Support insulator 3
g supported inside the metal outer tube 1a and the conductor 2b supported by the support insulator 3h
What is stored in b may be a transport unit, which may be welded on site to make it longer. In this case, the sliding contacts 6, 6
a all serve for the connection between the conductors 2a, 2b on site.

Embodiment 5 FIG. In the fifth embodiment, as shown in FIGS. 6 and 7, the supporting insulators 3a, 3b
Are two-legged. Then, one end of a metal fitting 28 is fixedly fastened to the inner wall surface of the enlarged-diameter portion 1n of the metal outer tube 1a by a bolt 30, and the supporting insulator 3a attaches the leg end electrode 3p to the other end of the fitting 28. It is fastened and fixed by bolts 29 and housed in the enlarged tube diameter portion 1n. Also,
The metal slide fitting 31 is used as the leg electrode 3p of the supporting insulator 3b.
And a groove-shaped guide groove 32 is fixed to the inner wall surface of the enlarged-diameter portion 1n in parallel with the axis, and the slide fitting 31 is fitted into the guide groove 32 so that the support insulator 3b is fixed to the axis. It is mounted in the enlarged tube diameter portion 1n so that it can move by heat shrinkage in a parallel direction and cannot move in a direction perpendicular to the axis. The other configuration is the same as that of the third embodiment.

The transport unit 10 thus configured
In order to assemble the pipe 4, first, both ends of the metal outer pipes 1 a and 1 b are enlarged by a pipe expansion method to increase the pipe diameter.
m, 1n are formed. Then, the perforated electrode 14c is attached to each of the outer diameter portions 1n of the outer metal tubes 1a and 1b. Further, the metal mounting fitting 28 and the sliding fitting 3
1 is fixed to the leg end electrodes 3p of the supporting insulators 3a and 3b. Then, a conductive filler metal 3g formed integrally with the supporting insulator 3a is applied to the left end face of the conductor 2a, the shield 8 is applied to the conductive filler metal 3g, and a bolt 16 is formed in the shield 8 by a hole formed in the shield 8. 3g through the hole 3m drilled in the conductor 2a
Tighten and fix to the screw holes provided at the ends of the. on the other hand,
A mounting bracket 28 is attached to the leg-end electrode 3p.
If the operation is performed after the connection of a and 2b, no bending moment needs to be applied to the supporting insulator 3a during the operation.

Next, a support insulator 3b is provided at the right end of the conductor 2a.
And a conductive bur 3h formed integrally with the conductor 2
The left end of b is placed on the conductive metal 3h, and the bolts 17 passing through the holes 3n are tightened to connect the conductors 2a and 2b with the conductive metal 3h interposed therebetween. At this time, the bolt 17 is connected to the conductor 2b through the hole 23.
The bolt 17 is inserted into the end of the conductor 2b by inserting a hand or a tool through the bolt opening 24 widely opened by displacing the shield 25 by shifting the shield 25 in advance. The bolt 17 is passed through the hole provided and the hole 3n formed in the conductive metal filling 3h, and the bolt 17 is further tightened into a screw hole provided at the end of the conductor 2a. Thereafter, the shield 25 is shifted to cover the bolt fastening opening 24, and the shield 25 is fixed to the conductor 2b by a small screw 26 having a rounded head, and is electrically connected. Finally, metal outer tube 1b
The conductor 2b is housed from the right side of FIG.
The sliding fitting 31 of the end electrode 3p moves so as to fit into the guide groove 32, the pipe diameter enlarged portions 1n and 1m are welded at the welding portion B, and the supporting insulator fixing bolt 30 is tightened to transport one piece. Unit 102 is assembled.

The transport unit 104 assembled in this way is transported to the site, and a predetermined number of units are connected at the site to form a long gas-insulated power transmission path. That is, at the site, after the gasket 12 is fitted to the pipe diameter enlarged portion 1m of one transport unit 104, the transport unit 105 is connected to the other transport unit 104.
On the other hand, from the left side in FIG.
n and transport unit 1 by welding at weld A
04 is connected. At this time, the guide rod 27 fastened to the conductive filler metal 3g is fitted into a hole provided at the end of the conductor 2b, and the concentricity between the contact surfaces on both sides of the sliding contact 6 bridging is set. As a result, the bridging of the sliding contact 6 is performed smoothly. In this way, a predetermined number of the transporting units 104 are sequentially connected and filled with an insulating gas to form a long gas-insulated power transmission path. After sealing the insulating gas, a conditioning operation is performed to remove impurities such as metal flakes that adversely affect the withstand voltage performance from the insulating gas, and the installation is completed.

As described above, also in the fifth embodiment, the same effects as in the third embodiment can be obtained. Also,
Since the supporting insulators 3g and 3h are of a two-leg type, a lightweight, easy to assemble, and less expensive transport unit can be obtained.

Embodiment 6 FIG. In the sixth embodiment, as shown in FIG. 8, the supporting insulator 3a is of a monopod type,
The leg end electrode 3p is fastened and fixed to a mounting base 33 fixed to the enlarged-diameter portion 1n of the metal outer tube 1a by welding or the like with bolts 34 and attached to the metal outer tube 1a. And
The perforated electrode 14d is fixed to the mounting base 33 in advance by welding or the like, and the perforated electrode 14e constituting the impurity trapping device 15 together with the perforated electrode 14d is fixed to the mounting portion 35 by welding or the like. By 36, it is fastened and fixed to the pipe diameter enlarged portion 1m. Although not shown,
The supporting insulator 3b is also of a monopod type, and its leg end electrode 3p is fixedly fastened to a mounting base 33 fixed by welding or the like to the pipe diameter enlarged portion 1n of the metal outer tube 1b with bolts 34 to fix the metal outer tube 1b.
Attached to. The perforated electrode 14d is fixed to the mount 33 in advance by welding or the like, and the perforated electrode 14d is
perforated electrode 1 which constitutes impurity trapping device 15 together with d
4e is fixed to the mounting portion 35 by welding or the like, and the mounting portion 35 is fastened and fixed to the enlarged-diameter portion 1m by a bolt 36. The other configuration is the same as that of the fourth embodiment.

Therefore, also in the sixth embodiment, the same effects as in the fourth embodiment can be obtained, and since the supporting insulators 3a and 3b are formed into a simple monopod, the supporting insulating material is formed. The production of objects becomes easier. Also,
Also in the sixth embodiment, similarly to the above-described fourth embodiment, when the interval between the supporting insulators is long and the conductor is supported by two supporting insulators, and the length of the transport unit exceeds the transport limit, In the factory, the conductor 2a in the stage before welding at the weld B is supported by the supporting insulator 3g and the metal outer tube 1a
And the conductor 2b is supported by the supporting insulator 3.
h and supported in the metal outer tube 1b can be used as a transport unit, which can be welded locally to be longer.

Embodiment 7 FIG. In the seventh embodiment, as shown in FIG. 9, both the conductive fillers 3 g and 3 h are formed into circular tubes, and large-diameter holes 3 m and 3 n through which all the bolts 16 and 17 collectively pass are formed. Is formed. Also, conductor 2
a has a hole 23 for receiving the bolt 16 and the bolt 1
6, a bolt fastening opening 24 for inserting a fastening tool or a hand is provided.
Is slidably mounted for closing the shield. In addition, the conductor 37 and the conductor 2a, which are the sliding mating surfaces of the sliding contact 6, are tightly integrated by bolts 16 that pass through the holes 3m with the conductive filler metal 3g interposed therebetween. The other configuration is the same as that of the third embodiment.

Therefore, also in the seventh embodiment, the same effects as those of the third embodiment can be obtained, and since the conductive fillers 3g and 3h are circular tubes, it is necessary to provide holes for the number of bolts. , The cost is low, and the connection workability is improved.

Embodiment 8 FIG. FIG. 10 is a sectional view showing a main part of a gas-insulated power transmission line according to Embodiment 8 of the present invention. In the figure, a conductor 2a is formed in a hollow cylindrical body having a connection wall 42 at its end. The connection wall 42 is provided with a hole 23 for receiving the bolt 16.
An opening 24 for bolt fastening work for mounting and fastening the bolt 16 is provided on the outer peripheral portion of the conductor 2a.
An annular shield 25 for closing the bolt fastening work opening 24 is mounted on the conductor 2a so as to be slidable in the axial direction. An engagement groove 40 extending in the circumferential direction is provided on the inner peripheral surface of the shield 25. Further, a contact 39 made of a material having a spring property such as phosphor bronze is fastened and fixed to the inside of the conductor 2a by a screw 41.
Of the shield 25 is inserted into a small hole 38 formed in the conductor 2a to engage with the engagement groove 40 of the shield 25, and the spring force of the contact 39 prevents the shield 25 from moving. 2a is secured electrically.
Although not shown, the shield 2 in the conductor 2b
The fixing structure of No. 5 is also configured similarly to the fixing structure of the shield 25 on the conductor 2a. The other configuration is the same as that of the seventh embodiment.

Next, a method of connecting conductors according to the eighth embodiment will be described. The bolt 16 is inserted through the hole 23 provided in the connecting wall 42 of the conductor 2a, and a conductive filler metal 3g is applied to the end of the conductor 2a.
Guess. Next, the shield 25 is slid in the axial direction to open the bolt fastening work opening 24. And
The bolt 16 is passed through the connection wall 42 by inserting a hand through the bolt fastening opening 24, passed through the hole 3 m of the conductive filler metal 3 g, and screwed into the screw hole provided in the conductor 37, and the fastening tool is inserted. To tighten the bolt 16. Similarly, the necessary number of bolts 16 are tightened to integrally connect the conductor 2a, the conductive burying 3g, and the conductor 37. The shield 8 is connected to the conductor 3
7 is fastened and fixed with bolts. Thereafter, the fastening tool is taken out and the shield 25 is slid in the axial direction to close the bolt fastening opening 24. When the engagement groove 40 provided on the inner peripheral surface of the shield 25 reaches the position of the tip of the contact 39, the tip of the contact 39 is brought into engagement groove 40 by spring force.
And comes into contact with the bottom of the engagement groove 40. As a result, the movement of the shield 25 is prevented, and the shield 25 and the conductor 2a are electrically connected to each other to have the same potential. Note that the conductor 2a and the conductor 2b are sandwiched between the conductive
The same applies to the case where the fastening is integrated by the bolt 17 passing through the hole h. Further, it is preferable that the shield 25 is made of an aluminum alloy, and the surface excluding the engagement groove 40 is subjected to an oxide film treatment (alumite treatment) so as to have electric insulation.

As described above, according to the eighth embodiment,
In the high electric field portion, only the shield 25 having a good surface condition appears, and the shield 25 and the conductor 2a are kept at the same potential. Therefore, no partial discharge occurs between the shield 25 and the conductor 2a, and the shield 25 Good current resistance can be obtained without fear of melting due to shunting when a large current flows between the conductor and the conductor 2a. A small hole 3 provided in the conductor 2a with the tip of a contact 39 having a spring force attached to the conductor 2a.
Since the shield 25 is fitted into the engagement groove 40 provided in the shield 25 through 8, the shield 25 can be easily fixed, and the workability of connection between conductors can be improved.

Here, the fixing structure of the shield 25 according to the eighth embodiment is not limited to the connection between the conductors of the gas insulated power transmission line, but can be widely applied to the case where the conductors to which a high voltage is applied are bolted together. It is. Although the eighth embodiment has been described as being applied to the gas-insulated power transmission line according to the seventh embodiment, the same effects can be obtained by applying to the gas-insulated power transmission line according to the other embodiments. .

[0067]

According to the present invention, a plurality of power transmission path units in which a conductor is supported by a supporting insulator and housed in a metal outer tube are electrically connected to each other using sliding contacts. And a gas-insulated power transmission line in which the ends of the metal outer tube are airtightly connected to each other and lengthened, and further the insulating gas is sealed in the airtightly connected metal outer tube. One end of the conductor has a shape in which the sliding contact is fitted, and the conductive metal is fastened and fixed to the other end of the conductor by a plurality of bolts penetrating the conductive metal in the axial direction. A supporting insulator is integrally formed on the outer periphery of the conductive metal, the sliding contact is fitted to the conductive metal, and a shield is attached to the conductive metal so as to cover the sliding contact. Eliminates spatter fouling associated with welding and provides excellent insulation reliability. It is possible to obtain an edge transmission path.

In addition, since the shield is integrally fixed to the conductor together with the conductive filler by a plurality of bolts penetrating the conductive filler in the axial direction, the number of bolts and the number of fastening steps are reduced. Thus, cost reduction is achieved.

Further, the gas-insulated power transmission line according to the present invention
A plurality of divided conductors are connected to each other in the axial direction with their respective axes aligned so as to sandwich the conductive filler metal, and a conductive filler metal is fixed to the tip of the divided conductor on one side of the plurality of divided conductors. A plurality of power transmission path units, each of which has a conductor which is supported by a supporting insulator formed integrally with the outer periphery of each conductive bur and is housed in a metal outer tube, slides the ends of the conductors into sliding contacts. A gas-insulated power transmission line that is electrically connected to each other, and the ends of the metal outer tube are airtightly connected to each other to be elongated, and further, an insulating gas is sealed in the airtightly connected metal outer tube. In at least one of the connecting portions between the plurality of divided conductors with the conductive filler metal interposed therebetween, adjacent ones of the divided conductors are connected to each other by using a plurality of bolts penetrating the conductive filler metal in the axial direction. Because I fixed it with gold together,
Sputter contamination due to welding can be eliminated, and a gas-insulated power transmission line having excellent insulation reliability can be obtained.

Further, the gas-insulated power transmission line according to the present invention
A plurality of divided conductors are connected in the axial direction with conductive shafts sandwiched therebetween with their respective axes aligned, and a conductive filler metal is fixed to the tip of the divided conductor on one side of the plurality of divided conductors. A plurality of power transmission path units, each of which has a conductor which is supported by a supporting insulator formed integrally with the outer periphery of each conductive burring and is housed in a metal outer tube, slides the ends of the conductors into sliding contacts. A gas-insulated power transmission line that is electrically connected to each other, and the end portions of the metal outer tube are airtightly connected to each other to be elongated, and the insulating gas is sealed in the airtightly connected metal outer tube. In at least one of the connecting points between the plurality of divided conductors with the conductive filler metal interposed therebetween, the conductive filler metal is divided into one by using a plurality of bolts penetrating the conductive filler metal in the axial direction. The conductor fixed integrally to the conductor and fixed to the one of the divided conductors Since the gold and the other divided conductor are electrically connected using the sliding contact for connecting the divided conductor, spatter contamination due to welding is eliminated, and a gas-insulated power transmission line having excellent insulation reliability is obtained. be able to.

Further, a large-diameter portion in which the diameter of the metal outer tube is enlarged is formed at each of the installation positions of the supporting insulator, and an impurity trapping device is provided in the large-diameter portion. The time can be shortened, the impurities can be reliably captured, and the occurrence of dielectric breakdown due to the impurities can be suppressed.

Further, since the large diameter portion is formed by enlarging the metal outer tube by a pipe expansion method, the large diameter portion can be manufactured at low cost.

Further, since a large-diameter hole through which the plurality of bolts are inserted is provided in the conductive burying member in the axial direction so as to penetrate the conductive burying member, connection workability is improved and the conductive burying member is manufactured. And the cost is reduced.

Further, since the conductive filler metal is made of aluminum or aluminum alloy, and the bolt is made of aluminum alloy, copper alloy or stainless steel, the difference in thermal expansion coefficient between the bolt and the conductive filler metal is small. For example, it is possible to suppress the loosening of the bolted portion due to the temperature change due to the above.

Further, since the conductive filler metal is made of aluminum or an aluminum alloy, the bolt is made of steel, and a disc spring having a spring property is used for the washer of the bolt, the bolt and the conductive filler metal are used. The difference in thermal expansion and contraction due to the difference in thermal expansion coefficient is absorbed by the disc spring, and the loosening of the bolted portion due to a temperature change due to energization or the like can be suppressed.

Further, the connection between the conductor or the divided conductor and the conductive filler metal is performed by fastening the stud and the nut implanted in the conductor or the divided conductor, so that the assembling workability can be improved. .

Further, according to the present invention, the steps of manufacturing the first and second metal outer tubes each having one end having a large diameter portion, and the step of forming the first supporting insulator integrally with the outer periphery of the conductive outer tube are performed. Gold is fastened and fixed to one end of the first split conductor by a bolt penetrating the conductive buried metal, and the first split conductor is inserted from the large-diameter side of the first metal outer tube to form a first support. A step of fixing an insulator to the large-diameter portion of the first metal outer tube; and a step of forming the second divided conductor by sandwiching the first supporting insulator with a conductive filler metal integrally formed on an outer periphery thereof. Tightening and fixing the other end of the divided conductor with a bolt penetrating the conductive filling metal, and sliding the large-diameter portion of the second metal outer tube to the end of the second support insulator Receiving the second split conductor inside and connecting the large diameter portion of the second metal outer tube to the end of the first metal outer tube. , It is possible to obtain an assembly method of the shipping unit of gas insulated transmission line to improve the insulation reliability and assembling workability.

Further, according to the present invention, the first metal outer tube having the large diameter portions at both ends and the second metal outer tube having the same diameter as the portion excluding the large diameter portion of the first metal outer tube. And a step of producing
A conductive filler metal having a second supporting insulator integrally formed on its outer periphery is sandwiched between the first and second divided conductors, and the first and second divided conductors are fastened by bolts penetrating the conductive filler metal. Integrating the first divided conductor integrated with the second divided conductor from the other side of the first metal outer tube;
A step of slidably supporting the second supporting insulator at the other large diameter portion on the other side of the first metal outer tube; The first embedded conductor is fixed to the first divided conductor by a bolt that penetrates the first embedded conductor, and the first supporting insulator is fixed to the first metal outer tube by a bolt penetrating the first embedded conductor. Fixing the second metal outer tube to the large diameter portion on one side, and housing the second divided conductor integrated with the first divided conductor so as to accommodate the second metal outer tube. A step of connecting the pipe to the large-diameter portion on the other side of the pipe. Therefore, it is possible to obtain a method of assembling a unit for transporting a gas-insulated power transmission path, which improves insulation reliability and assembly workability.

Further, according to the present invention, the steps of manufacturing the first and second metal outer tubes each having one end having a large diameter portion, and the step of forming the first support insulating material integrally with the outer periphery by the conductive embedding. Gold is fastened and fixed to one end of the first divided conductor by a bolt penetrating the conductive buried metal, and the first divided conductor is inserted from the large-diameter side of the first metal outer tube to form a first support. Fixing the insulator to the large-diameter portion of the first metal outer tube; and forming a second conductive insulating metal integrally formed on the outer periphery of the second supporting insulator with a bolt penetrating the conductive metal. Fastening and fixing to one end of the divided conductor, the second divided conductor is inserted from the large-diameter portion side of the second metal outer tube, and the second supporting insulator is attached to the large-diameter portion of the second metal outer tube. Fixing the sliding contact for connecting the divided conductor to the conductive filling metal; and connecting the sliding contact for connecting the divided conductor to the first split. While fitted to the body, fitting the large diameter portion of the second metal outer tube to the other end of the first metal outer pipe,
Connecting the large-diameter portion of the second metal outer tube to the other end of the first metal outer tube, thereby improving the insulation reliability and assembly workability. Can be obtained.

Further, according to the present invention, a hollow cylindrical shape having a connection wall at an end is formed, a bolt insertion hole is formed in the connection wall, and a bolt fastening work opening is formed in the outer peripheral portion. The ends of the first conductor and the second conductor provided with screw holes at the ends are butted directly or with a conductor interposed therebetween.
Insert your hand through the bolt tightening opening
In a conductor-to-conductor connection structure in which the first and second conductors are integrally connected by tightening the screw holes of the second conductor through the bolt insertion holes provided in the connection wall from within the hollow portion of the conductor, An engagement groove is provided on the peripheral surface to form an annular shape, and the first
An annular shield slidably mounted in the conductor in the axial direction to open and close the bolt fastening work opening;
A small hole formed in the conductor, and a spring-loaded contact attached to the inner wall surface of the hollow portion of the first conductor so that the tip extends outward from the small hole by spring force;
At the time of bolt fastening work, the shield is slid to open the bolt fastening work opening, and after the bolt fastening work is completed, the shield is slid to close the bolt fastening work opening, and The distal end of the contact extending from the hole is fitted into the engaging groove by utilizing the spring force of the contact to prevent the movement of the shield, and the shield and the first conductor are connected together. Since the potential is maintained, a connection structure between conductors that improves the workability of connection between conductors can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of a gas-insulated power transmission line according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is a cross-sectional view illustrating a main part of a gas-insulated power transmission path according to Embodiment 2 of the present invention.

FIG. 4 is a sectional view showing a main part of a gas-insulated power transmission path according to Embodiment 3 of the present invention.

FIG. 5 is a sectional view showing a main part of a gas-insulated power transmission path according to Embodiment 4 of the present invention.

FIG. 6 is a sectional view showing a main part of a gas-insulated power transmission path according to Embodiment 5 of the present invention.

7 is a sectional view taken along the line VII-VII in FIG.

FIG. 8 is a sectional view showing a main part of a gas-insulated power transmission path according to Embodiment 6 of the present invention.

FIG. 9 is a cross-sectional view showing a main part of a gas-insulated power transmission path according to Embodiment 7 of the present invention.

FIG. 10 is a cross-sectional view showing a main part of a gas-insulated power transmission path according to Embodiment 8 of the present invention.

FIG. 11 is a cross-sectional view showing a main part of a conventional gas-insulated power transmission line.

[Explanation of symbols]

1a, 1b metal outer tube, 1n tube diameter enlarged part (large diameter part),
2a conductor (first divided conductor), 2b conductor (second divided conductor), 3a supporting insulator (first supporting insulator), 3
b supporting insulator (second supporting insulator), 3g, 3h conductive filling, 3m, 3n hole, 5a, 5b connecting ring (large diameter), 6 sliding contact, 6a sliding contact for conductor connection Child, 8 shield, 15 impurity trapping device, 16, 17
Bolt, 24 bolt fastening opening, 25 shield, 38 small hole, 39 contacts, 40 engagement groove, 100,
101, 102, 103, 104 Transport unit.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Setsuyuki Matsuda 2-6-1 Otemachi, Chiyoda-ku, Tokyo Mitsui Electric Engineering Co., Ltd. (72) Inventor Yoshinori Shimizu 2-2-2 Marunouchi, Chiyoda-ku, Tokyo No.3 Mitsubishi Electric Corporation F-term (reference) 5G365 DA01 DH08 DP01

Claims (14)

[Claims] 1. A plurality of power transmission path units each having a conductor supported by a supporting insulator and housed in a metal outer tube, the ends of the conductors are electrically connected to each other using sliding contacts, and In a gas-insulated power transmission path in which ends of the metal outer tubes are hermetically connected to each other to be elongated, and further, an insulating gas is sealed in the metal outer tubes connected to each other in an air-tight manner, A contact is fitted, and the conductive filler metal is fastened and fixed to the other end of the conductor by a plurality of bolts penetrating the conductive filler metal in the axial direction. The sliding contact is integrally formed on the outer periphery of the filling metal, the sliding contact is fitted to the conductive filling, and a shield is attached to the conductive filling so as to cover the sliding contact. Gas insulated transmission line. 2. The gas according to claim 1, wherein the shield is integrally fixed to the conductor together with the conductive metal by a plurality of bolts penetrating the conductive metal in the axial direction. Insulated transmission line. 3. A plurality of divided conductors are connected to each other in the axial direction with their respective axes aligned in the same direction with a conductive filler metal interposed therebetween, and a conductive filler metal is attached to the tip of one of the divided conductors on one side of the plurality of divided conductors. A plurality of power transmission path units formed by fixing a conductor and being supported by a supporting insulator integrally formed on the outer periphery of each conductive filler metal and housed in a metal outer tube are connected to the ends of the conductor. It is electrically connected using a sliding contact, and the ends of the metal outer tube are airtightly connected to each other to be elongated, and the insulating gas is sealed in the airtightly connected metal outer tube. In the gas-insulated power transmission path, at least one of the connection points between the plurality of divided conductors with the conductive filler metal interposed therebetween is divided using a plurality of bolts penetrating the conductive filler metal in the axial direction. It is characterized in that the conductor and the conductive filler metal are integrally fastened and fixed. Gas insulated transmission line to. 4. A plurality of divided conductors are connected to each other in the axial direction with conductive shafts sandwiched therebetween with their axes aligned, and a conductive filler metal is provided at the tip of one of the divided conductors on one side of the plurality of divided conductors. A plurality of power transmission path units formed by fixing a conductor and being supported by a supporting insulator integrally formed on the outer periphery of each conductive filler metal and housed in a metal outer tube are connected to the ends of the conductor. It is electrically connected using a sliding contact, and the ends of the metal outer tube are airtightly connected to each other to be elongated, and the insulating gas is sealed in the airtightly connected metal outer tube. In the gas-insulated power transmission line, at least one of the connection points between the plurality of divided conductors with the conductive filler metal interposed therebetween includes a plurality of bolts that penetrate the conductive filler metal in the axial direction. And fasten it to one of the divided conductors. Gas insulated transmission line, characterized in that so as to electrically connect with a constant and conductive filler metals and other divided conductor and the split conductor sliding contacts for connection. 5. A large-diameter portion having an enlarged diameter of the metal outer tube is formed at each installation position of the supporting insulator, and an impurity trapping device is provided at the large-diameter portion. The gas-insulated power transmission line according to claim 1. 6. The gas-insulated power transmission line according to claim 5, wherein the large-diameter portion is formed by enlarging the metal outer tube by a tube expansion method. 7. The conductive filling metal according to claim 1, wherein a large-diameter hole through which the plurality of bolts are inserted is provided to penetrate in the axial direction. A gas-insulated power transmission line according to item 1. 8. The method according to claim 1, wherein said conductive metal is made of aluminum or aluminum alloy, and said bolt is made of aluminum alloy, copper alloy or stainless steel. Gas insulated transmission line. 9. The method according to claim 1, wherein said conductive metal is made of aluminum or an aluminum alloy, said bolt is made of steel, and a disc spring having a spring property is used for a washer of said bolt. The gas-insulated power transmission line according to claim 7. 10. The method according to claim 1, wherein the connection between the conductor or the divided conductor and the conductive filler metal is performed by fastening a stud and a nut implanted in the conductor or the divided conductor. The gas-insulated power transmission line according to any one of the above. 11. A step of manufacturing first and second metal outer tubes each having one end having a large diameter portion, and a step of forming a conductive metallurgy having a first supporting insulator integrally formed on an outer periphery thereof. Is fastened and fixed to one end of the first divided conductor by a bolt penetrating the first metal conductor, the first divided conductor is inserted from the large-diameter portion side of the first metal outer tube, and the first supporting insulator is removed from the first metal outer tube. Fixing the second divided conductor to the large-diameter portion of the metal outer tube, and connecting the second divided conductor to the other end of the first divided conductor with a conductive metal mold integrally formed on the outer periphery of a second supporting insulator. A step of tightening and fixing with a bolt penetrating the conductive filling metal; and a step of sliding the second divided conductor while sliding a large-diameter portion of the second metal outer tube to an end of the second supporting insulator. Put it inside,
Connecting a large-diameter portion of the second metal outer tube to an end of the first metal outer tube. 12. A first metal outer tube having large-diameter portions at both ends and a second metal tube having the same diameter as the first metal outer tube excluding the large-diameter portion.
And a step of forming a metal outer tube by sandwiching a conductive filler metal integrally formed on the outer periphery with a second supporting insulator between the first and second divided conductors, and using a bolt penetrating the conductive filler metal. A step of fastening and integrating the first and second divided conductors; and inserting the first divided conductor integrated with the second divided conductor from the other side of the first metal outer tube; Sliding the supporting insulator at the other large-diameter portion on the other side of the first metal outer tube; and dividing the conductive filler metal integrally formed on the outer periphery of the first supporting insulator into the first division. The conductive filler metal is fastened and fixed to the first split conductor by a bolt penetrating the conductive filler metal, and a first supporting insulator is placed on one side of the first metal outer tube. Fixing the second metal outer tube to the first divided conductor and housing the second divided conductor integrated with the first divided conductor. Connecting the first metal outer tube to the other large-diameter portion on the other side of the first metal outer tube in the above manner. 13. A step of producing first and second metal outer tubes each having a large diameter portion at one end, and a step of forming a conductive metallurgy having a first supporting insulator integrally formed on an outer periphery thereof. Is fastened and fixed to one end of the first divided conductor by a bolt penetrating the first metal conductor, the first divided conductor is inserted from the large-diameter portion side of the first metal outer tube, and the first supporting insulator is removed from the first metal outer tube. Fixing a conductive metal mold having a second supporting insulator integrally formed on the outer periphery thereof with a bolt penetrating the conductive metal mold to one end of the second divided conductor. After fixing, the second divided conductor is inserted from the large-diameter portion of the second metal outer tube, and the second supporting insulator is fixed to the large-diameter portion of the second metal outer tube. Fitting a sliding contact for connection to the conductive bur, and fitting the sliding contact for split conductor connection to the first split conductor; The large-diameter portion of the second metal outer tube is fitted to the other end of the first metal outer tube, and the large-diameter portion of the second metal outer tube is connected to the other end of the first metal outer tube. And a process for assembling a unit for transporting a gas-insulated power transmission line. 14. A first conductor having a hollow cylindrical shape having a connection wall at an end, a bolt insertion hole formed in the connection wall, and a bolt fastening opening formed in an outer peripheral portion. And the end of the second conductor provided with a screw hole at the end, butted directly or with a conductor interposed therebetween, and a hand is inserted through an opening for bolting work to remove a bolt from the hollow portion of the first conductor. In a connection structure between conductors, wherein the first and second conductors are integrally connected by being fastened to a screw hole of the second conductor through a bolt insertion hole provided in the connection wall, an engagement groove is formed on an inner peripheral surface. And an annular shield which is slidably mounted in the axial direction on the first conductor to open and close the bolt fastening work opening, and is provided in the first conductor. The first hole so that the tip extends outward from the small hole by a spring force; A contactor having a spring property attached to the inner wall surface of the hollow portion of the conductor. While sliding the shield to close the bolt fastening work opening, the tip of the contact extending from the small hole is fitted into the engagement groove by using the spring force of the contact, and the shield is closed. A connection structure between conductors, wherein movement is prevented and the shield and the first conductor are kept at the same potential.