JPH1014063A - Inter-panel connecting bus system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an inter-panel connecting bus system easy to constitute and reduce the number of required parts for facilitation of connecting work, by fitting an insulating cylinder onto insulation reinforcing layers on the cylindrical outside surface formed at ends of the insulating layers on insulating buses. SOLUTION: Insulating buses 11, 12 are secured on panels through bushings 13, 14. The horizontal sections of the insulating buses 11, 12 are placed in such a manner that their axes are positioned on one and the same axis, and the insulation reinforcing layers 16, 17 formed at the ends of insulating layers are connected together by means of an insulating cylinder 15. The panels mounted with the insulating buses 11, 12 are transported to a site of installation and installed there. At this time a conductive contactor 21 and the insulating cylinder 15, slid to one of the insulating bus 12 in advance, are moved to electrically or insulatingly connect conductors 11a, 12a together and the insulation reinforcing layers 16, 17 together. This makes it possible to reduce the number of components and time required for the installation work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inter-board connection bus system for electrically connecting two adjacently arranged boards.

[0002]

2. Description of the Related Art As electrical equipment such as a switchboard, a transformer, or a gas insulated switch (GIS) disposed in various plants and buildings, those having a cubicle type board configuration are often used. These boards usually have the same shape,
Necessary pieces of the same size are arranged adjacent to each other and electrically connected by an insulating bus. In this case, each board is provided with a T-shaped bushing for retraction, and these bushings are connected with an insulating bus. However, the insulating bus uses a large-sized conductor because a large current needs to be supplied. Since the flexibility is low, a special device is required when the distance between adjacent boards is short.

FIG. 4 shows an example of a connection between boards in a cubicle type GIS. T-shaped bushings 3 and 4 are provided at the tops of the boards 1 and 2 arranged adjacent to each other. I have. These T-shaped bushings 3,
Reference numeral 4 denotes a molding in which T branch metal fittings 3a, 4a and connection conductors 3b, 4b are embedded and molded in an insulating bushing having tapered openings at both ends, and the ends of the connection conductors 3b, 4b pass through the legs of the insulating bushing, respectively. It is connected to the electrical equipment in the panels 1 and 2. A short CV cable 6 is used as the insulating bus 5, and connection plugs 7a and 7b are compression-connected to both ends of the cable conductor. Stress cones 8a and 8b are fitted at both ends of the cable insulating layer. These stress cones have tapered surfaces of the same shape as the tapered openings of the T-shaped bushings 3 and 4. On the back side thereof, cable protection fittings 9a and 9 having a built-in stress cone pressing mechanism are provided.
b are arranged respectively. In addition, stress corn 8
At least one of a and 8b is movably arranged so as to slide on the cable insulating layer.

When the insulating bus 5 having such a configuration is connected between the T-shaped bushings 3 and 4, first, as shown in FIG. 4A, one stress cone 8a of the insulating bus 5 is connected to a CV cable. 6, the terminal on the side of the connection plug 7a is inserted into the T-shaped bushing 3 as shown in FIG. 6B, and the T-branch fitting 3a is inserted as shown in FIG. Let through. Next, the CV cable 6 is pulled back, and the other end of the CV cable 6 is inserted into the other T-shaped bushing 4 as shown in FIG.
b is brought into electrical contact with the T branch metal fittings 3a and 4a. Subsequently, the stress cone 8a is slid and inserted into the T-shaped bushing 3, and the cable protection fittings 9a and 9b of the stress cones 8a and 8b are fixed to the T-shaped bushings 3 and 4, and the stress cone is pressed by the stress cone pressing mechanism. 8a and 8b are pressed against the tapered openings of the T-shaped bushings 3 and 4 to maintain the dielectric strength. By doing so, the connecting T-shaped bushings 3 and 4 can be connected by the insulating bus 5 without bending the CV cable 6.

[0005]

However, in the above-mentioned method, it is necessary to install the T-shaped bushings 3 and 4 for drawing in on the tops of the boards 1 and 2, respectively. In addition, it is necessary to attach the stress cones 8a and 8b and their pressing mechanisms to both ends, and there is a problem that the connection operation is complicated and not easy. The present invention
It is an object of the present invention to solve the above-described problems in the prior art, to provide an inter-panel connection bus system that has a simple configuration, requires a small number of parts, and is easy to connect.

[0006]

According to the inter-board connection bus system of the present invention, an insulating bus bar protruding from two boards arranged adjacent to each other is provided with a bushing on an outer periphery of an insulating layer near a board penetration portion. Integrally formed, the ends of the insulating bus are butted on the same axis, the conductors are connected by conductive contacts, and the cylindrical outer surfaces formed at the ends of the insulating layer of the insulating bus, respectively. The insulating cylinder is inserted between the insulating reinforcing layers.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, an insulating bus is formed by a rigid round rod-shaped conductor such as copper or aluminum and a relatively flexible and elastic solid insulating layer such as EP rubber covering the conductor. Can be configured. In this case, a bushing is integrally molded around the periphery of the solid insulating layer in the vicinity of the board-passing portion of the insulating bus bar, and the insulating bus bar can be attached to the board using this bushing. This bushing is also desirably formed of a relatively flexible and elastic insulating material such as EP rubber. In the present invention,
The connection between the boards can be performed using the space above the boards.
In that case, it is desirable to curve the middle of the insulating bus bar projecting upward from the top of the board into an L shape, and to connect their ends by abutting on the same axis in a horizontal plane. In the present invention, a support for axis alignment may be inserted between the ends of the conductors of the insulated bus bar butted on the same axis, and a plurality of finger contacts as the conductive contacts,
A plurality of coil springs can be configured to make these finger contacts elastically contact the outer surface of the recess for attaching the conductive contact near the tip of the conductor of the insulated bus.
Preferably, a shield ring for shielding the conductive contact is embedded in the inner surface of the insulating reinforcing layer.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the inter-panel connection bus system of the present invention will be described below with reference to the drawings.

In FIG. 2 and FIG. 3, high-voltage insulating buses 11 and 12 are provided between two boards 1 and 2 arranged adjacent to each other.
Connected by These insulated buses are
Is fixed to the boards 1 and 2 via the bushings 13 and 14. Insulated bus bars 11, 12
Have an L-shaped shape in which the middle is curved at a right angle, their horizontal parts are arranged so that their axes are located on the same axis, and an insulating cylinder is provided between the insulating reinforcing layers formed at the tips of the insulating layers. 15 are connected. FIG. 1 shows details of the above-mentioned insulated buses and their connecting portions. L-shaped insulated buses 11 and 12 which are bent at right angles in the middle thereof are made of a rod-shaped rigid conductor 11a such as copper or aluminum. , 12a
And a solid insulating layer 1 made of EP rubber or the like covering them.
1b and 12b, bushings 13 and 14 formed on the outer periphery of these solid insulating layers, and insulating reinforcing layers 16 and 17 having cylindrical outer surfaces formed at the tips of horizontal portions of the solid insulating layers 11b and 12b. It is configured. Bushing 1
3 and 14 and the insulating reinforcing layers 16 and 17
The same materials as those of b and 12b are used and are molded integrally therewith. Note that shielding layers 11c and 12c made of semiconductive EP rubber or the like are formed on the outer periphery of the solid insulating layer between the bushings 13 and 14 and the insulating reinforcing layers 16 and 17.

At the ends of the horizontal portions of the conductors 11a and 12a,
Support insertion holes are formed along these axes, and a support 18 for axis alignment is inserted between them. Ring-shaped recesses 19 and 20 for attaching conductive contacts are formed near the ends of the conductors 11a and 12a protruding from the ends of the insulating reinforcing layers 16 and 17, and a cylindrical shape is provided between them. And a plurality of coil springs 21b that elastically contact the inner surfaces near both ends of the finger contacts with the concave portions 19 and 20 of the conductors 11a and 12a, respectively. The contact 21 is attached to form a current path. The inclined surfaces of the ring-shaped concave portions 19 and 20 on the conductor tip side and the inner inclined surfaces of the inner surface protrusions of the finger contacts 21a opposed thereto have a force between the conductors 11a and 12a in the direction of separating them. Finger contact 2 even if added
An appropriate inclination angle is set so that 1a does not come out of the ring-shaped concave portions 19 and 20 carelessly.

The insulating cylinder 15 is made of an elastic insulating material such as EP rubber or the like, and has an inner diameter approximately equal to or slightly smaller than the cylindrical outer surfaces of the insulating reinforcing layers 16 and 17.
And a shield ring 1 embedded and molded in its inner surface
5b and a shielding layer 15c made of semiconductive EP rubber or the like that covers the outer peripheral surface of the insulating layer 15a. The length of the shielding layer 15c is slightly longer than the distance between the distal ends of the insulating reinforcing layers 16 and 17, and the concentration of the electric field due to the unevenness of the outer surface of the conductive contact 21 and the like is reduced. In the connection portion of the insulating bus, the mounting position of the insulating tube 15 is not in the middle of the horizontal portion of the insulating bus, but is shifted toward one of the insulating buses 11 and the ring-shaped recess 2 on the conductor 12a side.
0 is longer than the other ring-shaped concave portion 19, but this is because the insulating cylinder 15 and the conductive contact 21 are drawn to the one insulating bus 12 side before assembling the connecting portion as described later. This is to make it possible.

When the above-described inter-panel connection bus system is constructed, the insulating buses 11 and 12 are connected to the lower ends of the vertical portions of the panels 1 and 2 before being connected by the insulating tube 15 or the conductive contact 21. Mounting brackets 22 and 2 inserted into the board through through holes 1 a and 2 a formed in the top, and covered on bushings 13 and 14.
3 (these fittings are not shown in FIGS. 2 and 3) are fixed to the boards 1 and 2 by fixing them around the through holes 1a and 2a. Also, the insulating buses 11, 1
The inner ends of the conductors 2 are connected to conductors (not shown) on the electric device side in the panels 1 and 2. The boards 1, 2 on which the insulating buses 11, 12 are attached in this manner are transported to the installation location and installed. In this case, the insulating cylinder 15 and the conductive contact 21 are previously attached to one of the insulating buses 12 side. Move to. When positioning the boards 1 and 2, the horizontal axes of the insulating busbars 11 and 12 are aligned on the same axis, the tip of the support 18 faces the support insertion hole of the mating conductor 11a, and After accurately adjusting the positions of the boards 1 and 2 so that the distance between the ends of the conductors 11a and 12a is a predetermined dimension, the boards are fixed. After the positioning and fixing of the boards 1 and 2 are completed, a spanner is inserted into the gap between the tips of the conductors 11a and 12a to engage with the hexagonal head on the tip side of the support 18, and the support 18 is rotated. Move forward and the other conductor 1
1a is inserted into the support insertion hole. Next, the conductive contact 21 and the insulating tube 15 previously drawn to the one insulating bus 12 side are moved to electrically or insulatively connect the conductors 11a and 12a and the insulating reinforcing layers 16 and 17 respectively. Connecting.

The insulating reinforcing layers 16 and 17 and the insulating cylinder 15
The insulating layer 15a is made of an elastic insulating material such as EP rubber, and the inner surface of the insulating layer 15a is
6 and 17 are cylindrical surfaces having substantially the same diameter or slightly smaller dimensions as the outer surfaces thereof, so that their interfaces are in close contact with each other and maintain the necessary dielectric strength. An insulating tape may be wound around the outer periphery to reinforce the adhesion at the interface. In the above description, an L-shaped curved insulated bus is used,
Although the structure in which this is projected upward from the top of the board has been described, the present invention is not limited to this, and a linear insulated bus bar is projected laterally from the side surface of the board or the like. The present invention can also be applied to a board-to-board connection bus system having a structure.

As described above, in the inter-panel connection bus system of the present invention, the insulated bus and the bushing are integrated, and the insulated bus is connected at one place between the boards. The time required for on-site construction is halved, and the risks involved in construction are reduced. If an elastic solid insulator such as EP rubber is used as the insulating layer or bushing for the insulating bus, and a finger contact structure is used as the conductive contact, the thermal expansion and installation level of the board and the insulating bus will be reduced. Can be absorbed by deformation such as a bushing or sliding of the conductive contact.

[0015]

According to the present invention, the number of components is small,
An inter-panel connection bus system in which the construction time is greatly reduced can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a main part of an embodiment of an inter-panel connection bus system of the present invention.

FIG. 2 is a front view showing an embodiment of the inter-panel connection bus system of the present invention.

FIG. 3 is a side view showing an embodiment of the inter-panel connection bus system of the present invention.

FIG. 4 is an explanatory view showing a conventional connection method of an inter-panel connection bus.

[Explanation of symbols]

 1, 2, board 3, 4, pull-in T-shaped bushing 5, 11, 12, insulated busbar 6, CV cable 8a, 8b stress cone 13, 14, bushing 15, insulating cylinder 16, 17 insulation reinforcing layer 18 support 19, 20 ring-shaped recess 21 conductive contact 22, 23 mounting bracket

Claims (6)

[Claims] 1. A bushing is integrally formed on an outer periphery of an insulating layer near a board penetration portion of an insulating bus bar projecting from two boards arranged adjacent to each other. Abutting on the axis, connecting the conductors by conductive contacts, and straddling the insulating reinforcing layer on the cylindrical outer surface formed at the tip of the insulating layer of the insulating bus. An inter-panel connection bus system, wherein a bus is inserted. 2. A conductor having a rigid insulating bus, a resilient solid insulating layer covering the conductor, and a resilient molded integrally with the outer periphery of the solid insulating layer in the vicinity of the board penetration of the insulating bus. The inter-panel connection bus system according to claim 1, wherein the bus bar comprises a conductive bushing, and the insulating bus bar is attached to the panel via the bushing. 3. An insulation bus bar projecting from the top of the board, each of which has an L-shaped curve in the middle of the bus, and whose tips are abutted on the same axis in a horizontal plane. The inter-board connection bus system as described. 4. The board according to claim 1, wherein a support for axis alignment is inserted between the ends of the conductors of the insulated bus bar butted on the same axis. Connection bus system. 5. The outer periphery of the insulated bus near the tip of the conductor,
Each has a recess for mounting the conductive contact,
The conductive contact comprises a plurality of finger contacts and a plurality of coil springs for elastically contacting the finger contacts with the recesses of the conductor of the insulating bus. 2. The inter-panel connection bus system according to claim 1. 6. The inter-panel connection bus system according to claim 1, wherein a shield ring for shielding the conductive contact is embedded in an inner surface of the insulating reinforcing layer.