JPS6055816A - Method of fixing spacer of gas insulated electric device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] A. Field of Industrial Application This invention is for supporting a conductor coaxially within a metal cylinder (sheath) using an insulating support (spacer), such as in a conduit aerial power transmission line. SF in that space.

This invention relates to an improvement in a method for fixing a conductor and a spacer in gas-insulated electrical equipment filled with an insulating gas such as (sulfur hexafluoride).

Conventional gas insulated electrical equipment is used for high voltage and large current applications.
As shown in Figure 1, the sheath (2) is a metal cylinder,
A thick-walled copper or aluminum pipe is usually used as the conductor (1). Conductor (1) and spacer (
3), conventionally a spacer sleeve (4) is fixed to the spacer (3) on the conductor (1) as shown in Figure 1.
Pass the hole through the conductor (1), fix one end of the spacer sleeve (4) to the conductor (1) by welding (6), and attaching the welded part (6).
) to the outside of the shield cover (5). The spacer (3) is fixed to the sheath (2) by bolts (10).

C1 Problems to be Solved by the Invention Since gas insulated electrical equipment is used at high voltage, the insulation scum must be clear. However, in the above fixing method, the spacer sleeve (4) is welded [61] to the conductor peak.
Spacks and fumes may occur during welding, which may reduce insulation performance.

Furthermore, there are disadvantages such as conductors and the like being deformed by the heat during welding, resulting in poor dimensional accuracy and difficulty in assembly.

Disclosure of the Invention In this invention, one or more pairs of holes are formed in a part of a conductor, and a jig is attached to the holes to prevent dust inside the conductor from coming out. On the other hand, make one or more pairs of holes in the spacer sleeve at positions corresponding to the holes, and fix the conductor and spacer sleeve with bolts through the holes in the jig and spacer sleeve, and when tightening the bolts, shield the part with a shield cover. In other words, it eliminates the disadvantages of conventional fixing methods, such as a reduction in insulation performance, by requiring no welding during fixing.

E. Examples Examples of the present invention will now be described in more detail with reference to the drawings.

Embodiment 1 As shown in FIG. 2, a pair of aluminum layers is formed on a part of a conductor (1), and a jig (8) is attached thereto to airtightly isolate the inside and outside of the conductor. The jig (8) is cylindrical. A pair of holes are made in the spacer sleeve (4),
Align the hole in the jig (8) with the hole in the spacer sleeve (4), pass the bolt (7) through it, and tighten the nut (9) to connect the conductor (1) and the spacer sleeve (4), that is, the spacer (
3) Fix. Next, the shield cover (5) is fixed to the spacer sleeve (4) to shield the bolt head and nut portion.

This method of fixing the structure does not involve welding, so there is no possibility of spatter or fume being generated and the insulation performance deteriorates. It is easy to operate as it only needs to be fixed with bolts, and there is no need to apply heat from welding. There is no distortion of the conductor or spacer sleeve.

Embodiment 2 Two pairs of holes a]1. ah, and a jig (8
+, Attach tsf. As shown in the drawings, the holes and jigs are positioned so that they do not interfere with each other and are perpendicular to the axial direction. Spacer sleeve (4
), make two pairs of holes at the positions corresponding to 6dll and (111) of the conductor (''), align the holes of the jig (8), +8) with the holes of the spacer sleeve (4), and insert the bolts [7
), (narrow through rl) +9), (tighten 9S respectively and connect conductor (1) and spacer sleeve (4)
) That is, the spacer (3) is fixed. Next, attach the shield cover (5) to the spacer sleeve (4) so as to cover both bolts and nuts to shield the bolt head and the neck I.

According to this method, the same effect as in Example 1 can be achieved, and since two bolts are used, the conductor and spacer can be fixed more reliably.

Although the cases of one pair and two pairs have been described above, it goes without saying that the conductor and spacer can be more firmly fixed by providing multiple pairs of holes and bolts at appropriate angles in positions where they do not interfere with each other.

1. Effects of the Invention As explained in detail above, the method of the present invention is for fixing a conductor and a spacer in a gas-insulated electric device without welding, and also uses a jig to isolate the inside of the conductor from the insulating gas space. Because it is fixed, it is similar to the conventional fixing method [
There is no risk of deterioration of insulation performance due to spatter or fume caused by welding, and the fixing operation is easy because it is simply tightened with bolts. Furthermore, since heat from welding is not applied to the spacer sleeve or conductor, dimensional accuracy can be maintained without distortion of both, and powder Ht (U) inside the conductor leaks into the insulating gas space, contaminates the gas, and deteriorates insulation performance. This is a fixing method that has many advantages such as no problems.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional method of fixing a conductor and a spacer, Figs. 2 and 3 are sectional views showing an embodiment of the present invention, f
FIG. IS4 is a sectional view taken along line AA of the embodiment shown in FIG. (1) Conductor, (2) Sheath, (3) Spacer, (4) Spacer sleeve, (5) Shield cover, (6) Welded part, [
71, (7)...Bolt, (81, +8)--Jig,
(91, tsf... nut, qO)... mounting bolt, OB... hole. Agent Patent Attorney 1) Rio Naka Figure 1 Figure 2 r-” A A Figure 3 Figure 4

Claims (1)

[Claims] (1) In a method for fixing a spacer to a conductor in gas-insulated electrical equipment, one or more pairs of holes are made in the conductor and spacer sleeve, and a jig is used to prevent dust inside the conductor from coming out into the hole in the conductor into the insulating gas space. A method for fixing a spacer for cass-insulated electrical equipment, characterized by fixing the conductor and spacer by attaching the conductor and tightening a bolt that passes through the hole in the spacer sleeve and the jig.