JPS58130512A - Connecting lead structure - Google Patents

Abstract

PURPOSE:To prevent any damage to a lead wire, by applying an insulator such as Teflon or the like around the outer periphery of a metal cylinder having a small diameter to a predetermined length, inserting a predetemined length of the metal cylinder into a metal cylinder having a larger diameter, and providing a flexible insulator so as to cover the inserted portion of the first-mentioned metal cylinder. CONSTITUTION:An insulation 63 such as Teflon or the like is applied to that portion of the outer peripheral surface of a metal cylinder 52 having a small diameter which is inserted into a metal cylinder 53 having a large diameter, thereby preventing the generation of metallic powder by the friction between the metals constituting the cylinders 52, 53, respectively. Moreover, an ordinary insulation 62 is applied to the cylinder 53, and a bellows-like insulating pipe 64 formed by bulging or the like is secured to the insulation 62 by means of a bonding agent, for example, so as to cover the inserted portion of the metal cylinder 52. In addition, an ordinary insulation is applied to that portion of the outer peripheral surface of the cylinder 52 which is not inserted into the cylinder 53, thereby to constitute a connecting lead having a satisfactory insulating properties.

Description

[Detailed description of the invention] The present invention relates to trailing lead structures, particularly transformers.

The present invention relates to a connection lead structure suitable for absorbing deformation caused by earthquakes and the like while also ensuring insulation in a device in which flexible lead wires used for reactors and the like are housed in a metal cylinder for mitigating electric fields.

This conventional connection lead is constructed by encasing a flexible lead wire in a metal cylindrical circle for electric field relaxation to ensure insulation from the outside, and insulating the outer peripheral surface of the metal cylinder. It is used to connect transformers, reactors, etc. #
The X connection lead is used to fix the metal cylinder to the outside of a transformer, etc., and use the lead wire as a power edge.

According to such a connection lead structure, although the lead wire itself is flexible, the metal cylinder is rigid, so that the first-turn layer casing is displaced to the external bushing etc. due to an earthquake etc. This occurs, and the plated metal cylinder cannot absorb this displacement, and the metal cylinder is prone to permanent deformation or damage to the insulators installed above it, resulting in poor insulation reliability.

The object of the present invention is to eliminate the drawbacks of the above-mentioned prior art.

KTo provides a connection lead structure that accommodates displacement and does not affect insulation.

In order to achieve the above object, the present invention divides a metal cylinder for electric field relaxation into parts with different diameters, inserts the metal cylinder with a small diameter into the metal cylinder with a large diameter for a predetermined length, and At least 4 lengths of the outer circumferential surface of the cylinder to be inserted are covered with Cuteflon, etc.
It is constructed by providing a flexible material so that the yQ extension part can be extended.

An embodiment of the present invention will be described below based on sections.

M 111! ! JH This is an explanatory diagram showing the overall configuration of a transformer in which an embodiment of the present invention is used. In Figure 1,
Windings 2A and 2B wound around iron cores IA and IB are housed in two tanks 3 people and 3B, and the windings 2 people and 2B are all connected with leads 5 in a duct 4 connected to the two tanks 3 people and 38. connected by.

Since the present invention relates to the connection structure of the connection lead 5, the structure of the transformer will be omitted.

FIG. 2 is an enlarged sectional view showing the connection lead structure that is the basis of the present invention. $2 Figure 1゜ Connection lead 5
F-1, l) - The wire edge 50 is housed in a metal cylinder 51 for electric field relaxation, and insulation III & 61 is applied to the outer surface of this metal circle wJ51. Regarding IB, it is the same as in Fig. 1. Also, the connection lead 5 is mechanically held by the insulating supports 71A and 71B.

However, the connection lead is 5tl, it is possible! Since the is portion is small, deformation may not be absorbed.

FIG. 3 is a sectional view showing an embodiment of a connection lead structure according to the present invention. In FIG. 3, the same elements as in FIGS. 1 and 2 are given the same reference numerals and will be explained. In the embodiment shown in FIG. 3, the metal cylinder 51 is replaced by a metal cylinder 52 with different diameters.
and 53, the diameter of the outer circumferential surface of the metal cylinder 52 with a small diameter is 1! By applying 63t of insulation such as Teflon to the part inserted into the metal cylinder 53, one metal cylinder 5
2 and 53 to prevent the generation of metal powder due to friction between metals of different diameters, and in addition, the large diameter metal cylinder 53 is provided with normal insulation 62T.

A bellows-shaped insulating tube 64 formed by valve molding or the like is fixed to the insulating member 62 with adhesive or the like so that the inserted part lies horizontally, and the part where the normal insulating member 61 is not inserted is placed on the outer peripheral surface of the metal cylinder 52 having a small diameter. It is composed of 11 degrees of VL and lateral relationship. In addition, code 7
1 is a support.

Further, the lead 50 is housed in metal cylinders 52 and 53, and one end thereof is connected to the connecting wire 2B of the transformer. Further, 54 is a companion connection for keeping the metal cylinders 52 and 53 at the same potential.

Since the moss cylinders 52 and 5 are constructed in this way,
The three frames can be displaced by the dimensional difference between the inserted portions, and in this case as well, sufficient insulation can be maintained by the bellows-shaped flexible insulating tube 64.

It is only necessary to provide such a structure at an optimal location where the vibration displacement t-@ can be accommodated depending on the mutual positional relationship between the support 71 of the connection lead 5 and the tank 2.

As described above, according to the present invention, even if both ends of the connecting lead are displaced due to an earthquake or the like, the loss of the lead wire is reduced.
The effect can be seen in that it is possible to create a structure that does not occur, and also has a structure that does not affect insulation.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the overall configuration of a transformer in which an embodiment of the present invention is used, FIG. 2 is a sectional view showing the connection lead structure that is the basis of the present invention, and FIG. FIG. 2 is a cross-sectional view showing an example of a loose lead structure according to the present invention. 5... Connection lead, 50... Lead 11% 52.
...Metal cylinder with small diameter, 53...Metal cylinder with large diameter, 61 and 62...Insulation, 63...Insulation such as Teflon. '6t (j4 2B Kuzu J (ZJ

Claims (1)

[Claims] 1. In a connection lead structure in which a flexible lead wire is housed in a metal cylinder for electric field relaxation, the metal cylinder marked # is divided into pieces with different diameters, and An insulating material such as Teflon is applied to a predetermined length of the outer circumference of a metal cylinder, and this metal cylinder with a small diameter is inserted for a predetermined length into a larger metal cylinder. A connection lead structure characterized in that a flexible barrier is provided to cover the insertion portion.