JPH0438475Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention [Field of industrial application] The present invention relates to a connecting conductor that electrically connects devices.

[Conventional technology]

For convenience, cubicle-type gas insulated switchgear (for example ~
500KV) will be explained as an example.

In this switchgear, all equipment (breakers, disconnectors, instrument transformers, etc.) for each line unit is housed in a cubicle-type pressure vessel, and the interior is divided into constituent units. It is filled with an insulating gas such as SF ₆ gas.

Internal storage devices are electrically connected to each other via connecting conductors. In this case, the connecting conductor shall be capable of absorbing mounting position errors, thermal stress, vibrations, etc. between devices, and allowing a certain degree of relative movement between devices for electrical connection ( In the case of gas-insulated switchgear, if an insulating gas is filled in a pressure vessel housing equipment, a relative positional displacement of approximately 10 mm may occur between the housed equipment due to the increase in internal pressure within the vessel), b) Nearby connecting conductors It is necessary that no discharge phenomenon occurs between each other or between conductive members.

Conventionally, a connecting conductor having a configuration as shown in FIG. 7 has generally been used.

That is, in the figure, numeral 11 is a rigid round copper rod that is the main conductor that electrically connects devices A and B, and one end of the rod is formed as a terminal portion 12 that is bolted to one device A side. The other end side is formed as a core rod portion 13 having a smaller diameter than the connecting conductor main body 11.

Reference numeral 14 denotes a copper terminal portion separate from the round copper rod serving as the connection conductor main body 11, which is bolted to the other device B side. On the opposite side is a core rod part 15 having approximately the same diameter as the core rod part 13 on the round copper bar side which is the main body 11 of the connecting conductor.

Reference numeral 16 denotes a coupling portion that connects the two core rod portions 13 and 15 facing each other so as to be free to move relative to each other in the core rod axial direction and always maintain electrical continuity with each other.
A plurality of conductive vanes 17 are arranged in a radial shape with spacer rings 18 and 19 around the core rod parts 15, and each of the conductive vanes is arranged on the outer surface of the core rod parts 13 and 15. A cylindrical conductive vane plate assembly consisting of a coil spring ring 20 that is tightened and kept in constant pressure contact, and a smooth outer surface made of copper that surrounds and conceals the opposed core rod parts 13 and 15 including the vane plate assemblies 17 to 20. It consists of an electromagnetic shield capsule 21.

Thus, the round copper rod serving as the connection conductor main body 11 fixed to one device A side via the terminal portion 12 and the terminal portion 14 fixed to the other device B side are connected to each other at the coupling portion 16 . Since the opposite core rod parts 13 and 15 on the sides are free to move relative to each other in the core rod axial direction by the conductive vane assemblies 17 to 20 and are always electrically connected to each other, the devices A and B can be connected to each other. Absorption of mounting position errors, thermal stress, vibration, etc. between devices A and B, and a certain degree of relative movement between devices A and B
It is permissible to maintain electrical continuity between the two. Further, the shield capsule 21 prevents the coupling portion 16 from being damaged by electrical discharge.

[Problem that the invention attempts to solve]

However, due to the structure, the degree of freedom of swing for absorbing installation position errors between the devices A and B of the connecting conductor is substantially limited to one direction (front-back direction) in the axial direction of the opposing core rod portions 13 and 15 and rotation around the axis. It is limited and insufficient.

In view of the above, it is an object of the present invention to provide a connecting conductor that has a reasonable degree of freedom of swinging in all directions, front and back, top and bottom, and left and right, and is free from discharge breakdown problems.

B. Structure of the invention [Means for solving the problems] The electrical connection conductor between devices according to the invention is a connection conductor made of a collective bundle of thin conductor wires and twisted or braided wires having flexibility as a whole. A main body, a rigid device connection terminal portion provided at both ends of the main body of the connection conductor and having an outer surface plated with silver, and an electromagnetic shielding member with a smooth outer surface provided so as to surround substantially the entirety of the main body of the connection conductor. The gist of the present invention is that at least one of the connection terminal portions at both ends of the main body of the connection conductor is configured to allow an oscillating movement.

[Effect]

Due to the flexibility of the connecting conductor, at least one of the connecting terminals can swing freely in all directions, front and back, up and down, and left and right, so it can be installed in various mounting positions between devices. Error/thermal stress/
Can adequately handle vibrations, relative movement, etc.

Since the outer surface of the above connection terminal part is silver-plated, the contact resistance between the connection terminal part and the device is low.

Further, since the main body of the connecting conductor is almost entirely surrounded by an electromagnetic shielding member having a smooth outer surface, the shielding member prevents the trouble of discharge breakdown of the connecting conductor.

〔Example〕

Type 1 (FIG. 1)/Type 2 (FIG. 2) Type 1 is mainly a connecting conductor in which the entire thin conductor wire, its twisted wire, or its braided wire is flexible.

Reference numerals 2 and 3 are rigid device connection terminals provided at both ends of the connection conductor main body 1. In the case of this embodiment, the main body of the connecting conductor is molded by covering both ends thereof with sheath metals 2a and 3a made of a conductive material, respectively, and compression molding them into a rigid shape. Reference numerals 2b and 3b indicate fixing bolt insertion holes drilled in the compression-molded terminal portion.
The terminal parts 2 and 3 may be provided by separately manufacturing terminal blocks made of a conductive material and welding them to both ends of the connecting conductor main body 1 and attaching them integrally.

4A is a conductive and flexible electromagnetic shielding member having a smooth outer surface and surrounding substantially the entirety of the connection conductor main body 1.

Specifically, the electromagnetic shielding member 4A is made of a flexible rubber member, resin, etc., having conductivity with a volume resistivity of 500 Ω-cm or less, and FIG. 1 shows a heat-shrinkable tube made of the material. A type of electromagnetic shielding member 4A is shown in which the entire outer peripheral surface of the connecting conductor body 1 is closely surrounded by covering the connecting conductor body 1 and heat-shrinking it. A tube body made of flexible material is loosely fitted onto the outside, and both ends thereof are connected to the terminal portions 2 on those sides, respectively.
A type of electromagnetic shielding member 4A is shown in which the electromagnetic shielding member 4A is closely attached to the base of No. 3 by means such as welding.
An electromagnetic shielding member 4 is created by wrapping a tape-like material made of a conductive and flexible material around the outer peripheral surface of the connecting conductor main body 1.
It can also be A.

Copper material is generally used for the connecting conductor main body 1, sheath metals 2a, 3a, or terminal blocks, but other conductive materials such as nickel, aluminum, iron, etc. can also be used.

The outer surfaces of the connecting terminal parts 2 and 3 at both ends are silver-plated 2c and 3c to reduce the contact resistance with the devices A and B sides.

Both types 1 and 2 have connection terminals 2 at both ends due to the flexibility of the connection conductor main body 1 and the conductive shield member 4A that surrounds the main body 1.
3 is free to swing in all directions: front and back, up and down, left and right. Therefore, it is possible to sufficiently cope with various types of installation position errors, thermal stress, vibration, relative movement, etc. between the devices A and B. Moreover, the flexible electromagnetic shielding member 4A having a smooth outer surface surrounding the connecting conductor main body 1 prevents troubles such as discharge breakdown.

Types 3 to 6 (Figs. 3 to 6) Components common to those of Types 1 and 2 described above are given the same reference numerals and repeated explanations will be omitted.

4B surrounds almost the whole of the flexible connecting conductor main body 1, and allows rocking motion due to the flexibility of the connecting conductor main body 1 with respect to at least one connection terminal portion at both ends of the connecting conductor main body 1. It is a rigid electromagnetic shielding member with a smooth outer surface. Third,
In each of Types 3, 4, and 5 shown in Figures 4 and 5, one end of the rigid shield member 4B is integrally fixed to the base of the connecting terminal portion 2 on that side, and the other end is fixed to the base of the connecting terminal portion 2 on that side. The connecting terminal portion 3 is not fixed to the connecting terminal portion 3, and the connecting terminal portion 3 is allowed to oscillate in all directions, front and back, up and down, and left and right due to the flexibility of the connecting conductor main body 1. In the type 6 shown in FIG. 6, both ends of the shield member 4B are not fixed to the connecting terminal portions 2 and 3 on the respective sides, and both terminal portions 2 and 3 are connected to each other due to the flexibility of the connecting conductor main body 1. Before and after/
It allows vertical, horizontal, and all-round oscillating movements.

The rigid shield member 4B is generally made of copper, but other conductive materials such as nickel, aluminum, iron, etc. can also be used.

Although the electromagnetic shielding member 4B that surrounds the connecting conductor main body 1 of the above-mentioned types 3 to 6 is a rigid member, at least one of the connecting terminals on both ends is flexible. Depending on the gender, the head can swing freely in all directions, front and back, up and down, and left and right. Therefore, due to the omnidirectional swinging freedom of the connecting terminal, devices A and B
Installation position errors, thermal stress, and
Can fully handle vibrations, relative movements, etc. Furthermore, since the connecting conductor main body 1 is almost entirely surrounded by a rigid electromagnetic shielding member having a smooth outer surface, the shielding member prevents the trouble of discharge breakdown.

C. Effect of the invention As described above, the connecting conductor of the invention can sufficiently cope with various types of installation position errors, thermal stress, vibration, relative movement, etc. between devices A and B, and It has low contact resistance between the terminal part and the equipment, and there is no problem of discharge breakdown, making it effective and suitable as this type of connecting conductor.

[Brief explanation of the drawing]

1 to 6 are longitudinal sectional side views of various types of connection conductor examples according to the present invention, and FIG. 7 is a partially cutaway side view of a conventional example. Reference numeral 1 denotes a main body of a flexible connecting conductor, 2 and 3 terminal parts at both ends thereof, and 4A and 4B flexible or rigid electromagnetic shielding members.

Claims (1)

[Claims for Utility Model Registration] (1) Connecting conductor main body 1 consisting of a bundle of thin conductor wires and twisted or braided wires having flexibility as a whole
, rigid device connection terminals 2 and 3 provided at both ends of the connecting conductor main body 1 and having a silver-plated outer surface; An electrical connection conductor between devices, comprising a shield member 4, and configured to allow swinging motion of at least one connection terminal at both ends of the connection conductor main body 1. (2) The electromagnetic shielding member 4 has a volume resistivity of 500Ω-cm
The electrical connection conductor between devices according to claim 1, which is a flexible rubber member or resin member having the following electrical conductivity. (3) The electromagnetic shielding member 4 is a rigid conductive member, one end of which is integrally fixed to the base of the connecting terminal section 2 on that side, and the other end is not fixed to the connecting terminal section 3 on that side. The electrical connection conductor between devices according to claim 1, which allows the connection terminal portion 3 to swing in a swinging manner due to the flexibility of the connection conductor main body 1.