JPH11146541A - Fixing portion between conductor and spacer of gas-insulated electric equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a spacer rib and a conductor easier than in conventional cases, without providing a hole through the conductor. SOLUTION: A tubular conductor 2 is arranged coaxially within a metal sheath, and the conductor 2 is insulated and supported with an insulated spacer fixed to the metal sheath at the predetermined points in the longitudinal direction of the conductor 2. At the position of the insulated spacer, the conductor 2 is provided through a spacer sleeve 5 fixed to the insulated spacer. An engagement pin 18 is inserted to pin engagement holes 15, 17, provided corresponding to the spacer sleeve 5 and conductor 2 from the external surface side of the spacer sleeve 5, and the conductor 2 is fixed to the spacer sleeve 5. Screw holes 19, 20 are provided in both sides of the engagement pin 18 to the plate- type head portion 18a integrated to the base end of the engagement pin 18 and spacer sleeve 5, and a screw hole 22 is provided to the conductor 2 and the plate-type head portion 18a is fixed to the conductor 2 with a screw 23 which is screwed to the screw hole 22 of the conductor 2 through each screw hole 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated electric device such as a pipeline air cable (GIL) or a gas-insulated switchgear (GIS) for insulating and supporting a conductor coaxially arranged in a metal sheath. The present invention relates to a conductor-spacer fixing portion that fixes the conductor to the insulating spacer at the position of the insulating spacer.

[0002]

2. Description of the Related Art In a conventional fixed portion between a conductor and a spacer of an air cable in a pipeline, the conductor is fixed to the spacer sleeve by welding as shown in FIG. This conductor
In the inter-spacer fixing portion, an insulating member in which a small-diameter tubular conductor 2 coaxially arranged in a large-diameter tubular metal sheath 1 is fixed to the metal sheath 1 with a screw 3 at a predetermined position in its longitudinal direction. The insulating spacer 4 is insulated and supported by the spacer 4.
The conductor 2 is passed through a metal spacer sleeve 5 fixed to the insulating spacer 4 at the point of the above, and the conductor 2 is fixed to an end of the spacer sleeve 5 by a welded portion 6 so as to cover the welded portion 6. Then, the shield cover 7 is fitted around the outer periphery of the spacer sleeve 5 and is fixed to the spacer sleeve 5 or the conductor 2. The metal sheath 1 is filled with an insulating gas such as SF6 gas. Such a fixed portion between the conductor and the spacer is usually provided at one location in the longitudinal direction of the metal sheath 1 of one span, and the conductor sleeve is attached to the spacer sleeve 5 at another location of the insulating spacer 4 in the metal sheath 1. Is not fixed.

However, since the conductor 2 is fixed to the spacer sleeve 5 by the welded portion 6 in the conductor / spacer fixing portion having such a structure, a special technique and a welding device are required. .

Therefore, the conductor is fixed to the spacer sleeve by bolting, as shown in FIG.
An inter-spacer fixing portion has been proposed. In this conductor / spacer fixing portion, bolt through holes 8 and 9 are provided corresponding to the spacer sleeve 5 and the tubular conductor 2, and the bolt through holes 9 of the tubular conductor 2 are vacant in the tubular conductor 2. The sheath tube 10 separates the space 2a from the space 2a by a sheath tube 10 so that the air at the place 2a does not come into the metal sheath 1. The spacer sleeve 5 and the conductor 2 are passed through these bolt through holes 8,9. Bolt 11 and nut 12 screwed to this bolt 11
And the shield cover 7 is fitted around the outer periphery of the spacer sleeve 5 so as to cover the place where the bolt 11 is fastened, and is fixed to the spacer sleeve 5.

According to the conductor / spacer fixing portion having such a structure, there is an advantage that the fixing can be performed by a simple fastening operation using the bolt 11 and the nut 12.

[0006]

However, in the conductor-spacer fixing portion having the structure shown in FIG. 6, an aluminum pipe having an outer diameter of about 150 mm and a wall thickness of about 10 mm is used as the conductor 2. However, there is a problem in that the work of airtightly attaching the sheath tube 10 by penetrating the conductor 2 made of an aluminum pipe in a direction orthogonal to the conductor 2 is troublesome and troublesome.
Further, since the bolt 11 is relatively long, a gap is necessary.
Therefore, when an axial force is applied to the conductor 2, there is play in the conductor 2,
The generation of wear powder is a problem.

SUMMARY OF THE INVENTION It is an object of the present invention to fix a spacer sleeve and a conductor to a conductor / spacer of a gas insulated electric device which can be easily performed without penetrating a hole in the conductor and which is less likely to generate abrasion powder. It is to provide an interlock.

[0008]

SUMMARY OF THE INVENTION In a conductor-spacer fixing portion of a gas-insulated electric device to be improved by the present invention, a tubular conductor coaxially arranged in a metal sheath is provided at a predetermined position in the longitudinal direction. And is insulated and supported by an insulating spacer fixed to the metal sheath. At the location of the insulating spacer, a conductor is passed through a metallic spacer sleeve fixed to the insulating spacer, and the conductor is fixed to the spacer sleeve.

According to the first aspect of the present invention, the spacer sleeve and the conductor are provided with locking holes at corresponding locations in the radial direction. Into these locking holes, locking pins are inserted from the outer surface side of the spacer sleeve, and the conductor is fixed to the spacer sleeve. A plate-shaped head integrally provided at the base end of the locking pin along the outer surface of the spacer sleeve has screw through holes located on both sides of the locking pin. A screw hole is provided in the spacer sleeve corresponding to these screw holes, and a screw hole is provided in the conductor. The plate-shaped head is fixed to the conductor by screws that are passed through the respective screw holes and screwed into the screw holes of the conductor.

In such a fixed portion between the conductor and the spacer,
As a preparatory work, a hole is made in the spacer sleeve and the conductor on the side to be locked by the locking pin, a hole is made in the plate-shaped head and spacer sleeve of the locking pin on the side to be fixed with screws, and a tap hole is made in the conductor. All you have to do is dawn and it's a simple task. Further, since the conductor is fixed to the spacer sleeve by a locking pin and the locking pin is prevented from coming off by a screw, a large force that may be applied from the conductor side is borne by the locking pin, You can avoid applying large force, and you don't need to use thick screws that expect large force. In addition, the use of the screw can prevent the locking pin from coming off. In addition, the screws can be small,
Less abrasion powder is generated.

According to the second aspect of the present invention, screw holes are provided in the spacer sleeve in correspondence with the respective screw through holes provided on both sides of the locking pin and provided in the plate-shaped head. The plate-shaped head is fixed to the spacer sleeve by a screw that is passed through each screw through hole and screwed into a screw hole of the spacer sleeve.

In such a fixed portion between the conductor and the spacer,
Preparatory work includes drilling holes in the spacer sleeve and conductor on the side to be locked by the locking pin, drilling in the plate-shaped head of the locking pin on the side to be fixed with screws, and tapping in the spacer sleeve. It's just a simple task. Also, since the fixing of the conductor to the spacer sleeve is performed by a locking pin, and the locking pin is prevented from coming off by a screw,
The large force that may be applied from the conductor side is borne by the locking pin, so that a large force is not applied to the screw, and it is not necessary to use a thick screw that expects a large force. In addition, the use of the screw can prevent the locking pin from coming off. In addition, the screw may be small, and wear powder is not easily generated.

According to the third aspect of the present invention, the spacer sleeve and the conductor are provided with pin locking holes at corresponding locations in the radial direction. Locking pins are inserted into these pin locking holes from the outer surface side of the spacer sleeve to form a conductor fixing portion with respect to the spacer sleeve. The pin has its head held down by a shield cover to prevent it from falling off.

In such a fixed portion between the conductor and the spacer,
As a preparatory work, it is sufficient to simply make holes in the spacer sleeve and the conductor on the side to be locked by the locking pin, which is a simple operation. In addition, since the conductor is fixed to the spacer sleeve with a locking pin, and the locking pin is prevented from falling off by a shield cover, a screw for locking the locking pin is not required, and the structure is extremely low. It has the advantage of being simple.

[0015]

1 and 2 show an embodiment in which a conductor-spacer fixing portion of a gas-insulated electrical device according to the present invention is applied to a conductor-spacer fixing portion of a pipeline air cable. FIG. 1 is a longitudinal sectional view showing a main part configuration of the conductor / spacer fixing part, and FIG.
FIG. 3 is a sectional view taken along line XX of FIG. Parts corresponding to those in FIG. 5 described above are denoted by the same reference numerals.

In this conductor-spacer fixing portion,
As shown in FIG. 5, a small-diameter tubular conductor 2 coaxially arranged in a metal sheath 1 is provided at a predetermined position in the longitudinal direction thereof.
Insulating spacer 4 fixed to metal sheath 1 with screws 3
The conductor 2 is passed through a metal spacer sleeve 5 fixed to the insulating spacer 4 at the location of the insulating spacer 4 to cover the location where the conductor 2 is fixed to the spacer sleeve 5. As described above, the shield cover 7 is fitted on the outer periphery of the spacer sleeve 5, and the shield cover 7 is fixed to the spacer sleeve 5 or the conductor 2 (not shown).

In particular, in the conductor-spacer fixing portion of the present embodiment, the space between the spacer sleeve 5 and the conductor 2, the shield cover 7 and the spacer sleeve 5 correspond to the position where the conductor 2 is to be fixed to the spacer sleeve 5. And lubricating synthetic resin rings 13 and 14 such as polyfluorinated ethylene. These lubricating synthetic resin rings 13, 14
Is preferably a thickness that closes a space between adjacent members. The lubricating synthetic resin ring 13 is fitted and supported in a concave portion on the inner periphery of the spacer sleeve 5 existing on the outside thereof. Similarly, the lubricating synthetic resin ring 14
It is fitted into and supported by a concave portion on the inner periphery of the shield cover 7 existing outside.

In the places where the lubricating synthetic resin rings 13 and 14 are interposed so as to overlap with each other, pin locking holes 15 and 17 are formed in the spacer sleeve 5 and the conductor 2 at locations corresponding to each other in the radial direction. It is provided in. The pin locking hole 17 of the conductor 2 is provided at a depth that does not penetrate the thick portion of the conductor 2. The lubricating synthetic resin ring 13 is provided with a pin through hole 16 corresponding to the pin locking holes 15 and 17.

The pin engaging holes 15 and 17 and the pin through hole 16 have a diameter of 10 mm from the outer surface of the spacer sleeve 5.
The conductor 2 is fixed to the spacer sleeve 5 by inserting the locking pin 18 of mm. At the base end of the locking pin 18, a plate-shaped head 18a is provided integrally with the outer surface of the spacer sleeve 5. The plate-like head 18a is provided with screw holes 19 located on both sides of the locking pin 18. Corresponding to these screw holes 19, screw holes 20 and 21 are provided in the spacer sleeve 5 and the lubricating synthetic resin ring 13, and screw holes 22 are provided in the conductor 2, respectively. The screw hole 22 of the conductor 2 is provided at a depth that does not penetrate the thick portion of the conductor 2. Plate head 18
a is passed through each of the screw holes 19, 20, and 21 and
Are fixed to the conductor 2 by screws 23 screwed into the screw holes 22. The lubricating synthetic resin ring 14 is attached to the plate-shaped head 1.
8a.

In such a fixed portion between the conductor and the spacer,
As a preparatory work, holes for providing pin locking holes 15 and 17 are formed in the spacer sleeve 5 and the conductor 2 on the side locked by the locking pin 18, and holes for forming pin through holes 16 in the lubricating synthetic resin ring 13. On the side to be fixed with the screw 23, the plate-like head 18a of the locking pin 18, the spacer sleeve 5, and the lubricating synthetic resin ring 13 have screw through holes 19, 20, and 2.
1 and a tap hole for providing a screw hole 22 in the conductor 2 simply need to be made, which is a simple operation. Also,
The conductor 2 is fixed to the spacer sleeve 5 by the locking pin 1
8, the locking pin 18 is prevented from coming off by the screw 23. Therefore, a large force that may be applied from the conductor 2 side is borne by the locking pin 18, and a large force is applied to the screw 23. It is not necessary to use a thick screw 23 that expects a large force. Further, the use of the screw 23 can prevent the locking pin 18 from coming off.

Further, in this embodiment, since the lubricating synthetic resin rings 13 and 14 are interposed in the places where the metals come into contact with each other, the friction between the metals can be reduced and the generation of metal powder can be prevented.

FIG. 3 shows the configuration of a main part of a second example of the embodiment in which the conductor-spacer fixing portion of the gas-insulated electrical equipment according to the present invention is applied to the conductor-spacer fixing portion of a pipeline air cable. FIG. Parts corresponding to those in FIG. 2 described above are denoted by the same reference numerals.

In the conductor / spacer fixing portion,
This is different from the first example in that the fixing partner of the screw 23 is the spacer sleeve 5. That is, the spacer sleeve 5 is provided with a screw hole 20 'corresponding to each screw through hole 19 of the plate-shaped head 18a. Plate head 18a
Are fixed to the spacer sleeve 5 by screws 23 passed through the respective screw holes 19 and screwed into the screw holes 20 ′ of the spacer sleeve 5. Other configurations are the same as in the first example.

In such a fixed portion between the conductor and the spacer,
As a preparation work, a hole is made in the spacer sleeve 5 and the conductor 2 on the side to be locked by the locking pin 18, and a hole is made in the plate-shaped head 18 a of the locking pin 18 on the side to be fixed by the screw 23. In step 5, tapping may be simply performed, which is a simple operation. In addition, since the conductor 2 is fixed to the spacer sleeve 5 by the locking pin 18 and the locking pin 18 is prevented from coming off by the screw 23, a large force that may be applied from the conductor 2 side is locked. It is possible to prevent the screw 23 from applying a large force by using the pin 18 so that it is not necessary to use a thick screw that expects a large force. Further, the use of the screw 23 can prevent the locking pin 18 from coming off. Further, the screw 23 may be small, and abrasion powder is hardly generated.

FIG. 4 shows the configuration of a main part of a third example of the embodiment in which the conductor-spacer fixing portion of the gas-insulated electrical equipment according to the present invention is applied to the conductor-spacer fixing portion of a pipeline air cable. FIG. Parts corresponding to those in FIG. 2 described above are denoted by the same reference numerals.

In the conductor / spacer fixing portion,
Pin engagement holes 15 and 17 are provided in the spacer sleeve 5 and the conductor 2 at locations corresponding to each other in the radial direction at the locations where the lubricating synthetic resin rings 13 and 14 are interposed. The pin locking hole 17 of the conductor 2 is provided at a depth that does not penetrate the thick portion of the conductor 2. The lubricating synthetic resin ring 13 is provided with a pin through hole 16 corresponding to the pin locking holes 15 and 17.

The pin engagement holes 15 and 17 and the pin through hole 16 have a diameter of 10 mm from the outer surface of the spacer sleeve 5.
The fixing portion of the conductor 2 to the spacer sleeve 5 is formed by inserting the locking pin 18 of mm.

The shield cover 7 covers the fixing portion.
Is fitted on the outer periphery of the spacer sleeve 5 and is fixed to the conductor 2. To fix the shield cover 7 to the conductor 2, a fixing plate 24 is fixed in advance on the inner periphery of the distal end side of the shield cover 7 with screws 25, and the fixing plate 24 is
6 by fixing to the conductor 2. A hole 27 is formed in the shield cover 7 for turning the bolt 26 from outside the shield cover 7. Note that the shield cover 7 can be fixed to the spacer sleeve 5.

In this example, the pin 18 does not have the plate-shaped head 18a as in the above-described example, and the head is pressed down by the shield cover 7 via the lubricating synthetic resin ring 14 and is prevented from coming off. I have.

In such a fixed portion between the conductor and the spacer,
As a preparatory work, the spacer sleeve 5 and the conductor 2 may simply be perforated on the side to be locked by the locking pin 18.
It's a simple task. Further, the fixing of the conductor 2 to the spacer sleeve 5 is performed by the locking pin 18, and the locking pin 18 is prevented from coming off by the shield cover 7, so that a screw for stopping the locking pin 18 is not required. This has the advantage that the structure is very simple. Further, there is an advantage that no abrasion powder is generated due to a screw for retaining the locking pin 18.

[0031]

In the conductor / spacer fixing portion according to the present invention, as a preparatory work, a hole is formed in the spacer sleeve and the conductor on the side to be locked by the locking pin, and a locking pin is formed on the side to be fixed by the screw. It is only necessary to make holes in the plate-shaped head and the spacer sleeve, and to make tap holes in the conductor, which is a simple operation. Further, since the conductor is fixed to the spacer sleeve by a locking pin and the locking pin is prevented from coming off by a screw, a large force that may be applied from the conductor side is borne by the locking pin, Has the advantage that it is not necessary to use a thick screw which expects a large force. In addition, the use of the screw can prevent the locking pin from coming off. Further, the screw may be small, and there is an advantage that abrasion powder is hardly generated.

[Brief description of the drawings]

FIG. 1 is a longitudinal section showing a configuration of a main part of a first example of an embodiment in which a conductor-spacer fixing portion of a gas-insulated electrical device according to the present invention is applied to a conductor-spacer fixing portion of a conduit air cable. FIG.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a cross-sectional view showing a main part configuration of a second example of the embodiment in which the conductor-spacer fixing portion of the gas insulated electric device according to the present invention is applied to the conductor-spacer fixing portion of a pipeline air cable. FIG.

FIG. 4 is a longitudinal section showing a configuration of a main part of a third example of the embodiment in which the conductor-spacer fixing portion of the gas-insulated electrical device according to the present invention is applied to the conductor-spacer fixing portion of a conduit air cable. FIG.

FIG. 5 is a longitudinal sectional view showing a configuration of an example of a conventional conductor / spacer fixing portion of a pipeline air cable.

FIG. 6 is a vertical cross-sectional view showing the configuration of another example of a conductor-spacer fixing portion of a conventional conduit air cable.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal sheath 2 Conductor 2a Void 3 Screw 4 Insulation spacer 5 Spacer sleeve 6 Weld part 7 Shield cover 8,9 Bolt through hole 10 Sheath tube 11 Bolt 12 Nut 13,14 Lubricity synthetic resin ring 15,17 Pin locking hole 16 Pin Through Hole 18 Lock Pin 18a Plate Head 19, 20, 21 Screw Through Hole 22 Screw Hole 23 Screw 24 Fixing Plate 25 Screw 26 Bolt 27 Hole

Claims (3)

[Claims] A tubular conductor coaxially arranged in a metal sheath is insulated and supported at a predetermined location in the longitudinal direction by an insulating spacer fixed to the metal sheath, and at a location of the insulating spacer, The conductor is passed through a metal spacer sleeve fixed to a spacer, and the conductor is fixed to the spacer sleeve. Pin locking holes are provided at corresponding locations in the radial direction, locking pins are inserted into these pin locking holes from the outer surface side of the spacer sleeve, and the conductor is fixed to the spacer sleeve. A plate-shaped head integrally provided at the base end of the locking pin along the outer surface of the sleeve has screw through holes located on both sides of the locking pin. The spacer sleeve is provided with a screw through hole corresponding to these screw through holes, and the conductor is provided with a screw hole, respectively, and the plate-shaped head is passed through each of the screw through holes to form the conductor. A fixed portion between a conductor and a spacer of a gas-insulated electric device, wherein the fixed portion is fixed to the conductor by a screw screwed into a screw hole. 2. A tubular conductor coaxially arranged in a metal sheath is insulated and supported at a predetermined location in the longitudinal direction by an insulating spacer fixed to the metal sheath, and at a location of the insulating spacer, The conductor is passed through a metal spacer sleeve fixed to a spacer, and the conductor is fixed to the spacer sleeve. Pin locking holes are provided at corresponding locations in the radial direction, locking pins are inserted into these pin locking holes from the outer surface side of the spacer sleeve, and the conductor is fixed to the spacer sleeve. A plate-shaped head integrally provided at the base end of the locking pin along the outer surface of the sleeve has screw through holes located on both sides of the locking pin. The spacer sleeve is provided with a screw hole corresponding to each of the screw through holes, and the plate-shaped head is passed through each of the screw through holes and screwed into the screw hole of the spacer sleeve. A conductor-spacer fixing portion of the gas-insulated electric device, wherein the fixing portion is fixed to the spacer sleeve by the following. 3. A tubular conductor coaxially arranged in a metal sheath is insulated and supported at a predetermined location in the longitudinal direction by an insulating spacer fixed to the metal sheath, and at the location of the insulating spacer, The conductor is passed through a metal spacer sleeve fixed to a spacer, the conductor is fixed to the spacer sleeve by a fixing portion, and a shield cover is fitted on the outer periphery of the spacer sleeve so as to cover the fixing portion. In the conductor-spacer fixing portion of the gas-insulated electrical device fixed to the spacer sleeve or the conductor, a pin locking hole is provided in a corresponding position on the spacer sleeve and the conductor in a radial direction. A locking pin is inserted into the hole from the outer surface side of the spacer sleeve to form a fixing portion of the conductor to the spacer sleeve. It said pin conductor spacers between the fixed portion of the gas insulated electric apparatus, characterized in that the head is retained by being pressed by the shield cover.