JPH0479204B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Application of the Invention] The present invention relates to a conductor support device for a gas-insulated bus bar, and in particular, it is suitable for easily absorbing thermal expansion of a conductor, reducing the number of conductor support parts, and has mechanical strength. The present invention relates to a conductor support device having a conductor support device.

[Prior Art] Conventionally, as shown in FIG. 1, in a spacer for supporting a conductor of a gas-insulated bus bar, a solid conductor is embedded in a supporting spacer 3, so that the bus conductor 2 is bolted to the spacer 3. Connected by etc. Therefore, a large number of bus conductors 2 are required to construct a gas insulated bus bar unit. In addition, in order to absorb the difference in thermal expansion between the bus conductor 2 and the bus container 1, a tube contact 4 must be provided between the conductor supporting spacer 3, and the electromagnetic force between the phases is transferred to the bus conductor 2. Since the supporting spacer 3 has a cantilever support structure, the designated interval 1 of the supporting spacer 3 has to be made small, and the length of the insulating bus unit has to be shortened. Therefore, when constructing a long bus bar, the number of parts for the bus conductor 2 and the supporting spacer 3 is increased, resulting in a decrease in reliability and economical efficiency.

[Purpose of the invention]

An object of the present invention is to provide a conductor support device that facilitates absorption of thermal expansion of a conductor and reduces the number of conductor support components.

[Summary of the invention]

The present invention provides a conductor support device for a gas-insulated bus bar in which a shield fitting provided inside a spacer for supporting a bus conductor is cylindrical, and a bus conductor is inserted into the cylindrical shape to support the bus conductor. and a circumferential groove provided on the inner surface of the shield fitting of the spacer for supporting the bus conductor supporting the busbar conductor and the other side, a plurality of guide rings provided in this groove, and a shield fitting provided in the shield fitting corresponding to the grooves. A support part with a common structure consisting of multiple screws is provided,
A guide ring stored in a groove provided inside one of the shield metal fittings is tightened with a screw on the shield metal fitting, so that the bus conductor and the supporting spacer can slide.
The other supporting spacer and the bus conductor are directly fixed to each other by screws on the shield fitting that pass through the divided guide ring/extension part.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings. FIG. 2 shows the state in which the conductor of the present invention is supported. Busbar support spacers 5 and 5' are fixed inside the busbar container 1, and the busbar conductor 2 is supported by penetrating the inside of the support spacers 5 and 5'. The busbar units are connected by tube contacts 4, and the containers 1 are connected by flanges. An insulating gas is sealed in the container 1 to constitute a gas insulated bus bar. The inner surfaces of the above-mentioned support spacers 5 and 5' are marked with the marks shown in FIG.
As shown in FIG. 5, the shield fitting 6 is provided with a support portion having a common structure.

The configurations of these support parts will be explained below. Figures 3 and 4 show details of the conductor support part of the support spacer 5', including a shield fitting 6 embedded in the support spacer 5', and a guide divided into grooves provided inside the support spacer 5'. The ring 7 is placed and the bus conductor 2 is inserted. The guide ring 7 allows the bus conductor 2 to easily slide and is electrically connected to the shielding tool 6.
It is made of metal that can come into contact with. Shield fitting 6
A screw 8 is tightened into the screw hole provided inside the groove with such a tightening force that the busbar conductor 2 can slide on the guide ring 7. On the other hand, the conductor support portion of the support spacer 5 is shown in FIGS. 5 and 6. This support portion serves to fix the bus conductor 2 and the support spacer 5 so that they do not slide. Divided guide ring 7 used to insert bus conductor 2
is placed in the groove avoiding the screw hole provided in the groove of the shield fitting 6, the fixing screw 9 is brought into direct contact with the bus conductor 2, and is tightened with a predetermined torque.
The supporting spacer 5 and the bus conductor 2 are fixed. Therefore, since the bus conductor 2 of the support spacer 5' is slidably supported, the bus conductor 2 and the bus container 1 are
Since it is possible to absorb the difference in thermal expansion and to specify the direction in which thermal expansion occurs, it is possible to reliably absorb the load due to the difference in thermal expansion that acts on the bus conductor 2 or the bus container 1.

In addition, the supporting part of the supporting spacer 5 is formed by changing the arrangement of the guide ring 7 and pressing the screw 9 against the bus conductor 2 through the spacer between the guide rings 7. can be fixed to.

Further, since the support part of the support spacer 5' is also configured in common with the support part of the support spacer 5, the bus conductor 2 can be fixed with the screw 8.

The configuration of the present invention can also be applied to a polyphase gas insulated bus bar in which a plurality of bus conductors 2 are housed in the bus bar container 1, and is effective for supporting the bus bar of a long bus conductor 2.

〔Effect of the invention〕

According to the present invention, the bus conductor can be fixedly supported by one support spacer that supports the bus conductor, and the bus conductor can be slidably supported by the other support spacer, so that the difference in thermal expansion can be reduced. can be absorbed and improve the mechanical reliability of the bus conductor. In addition, the support part of the busbar conductor provided on each support spacer has a common structure, so it is possible to standardize parts, and the support type can be easily changed to fixed or sliding type, so thermal expansion can occur. This has the effect of specifying the direction and making it easier to install the absorption means.

[Brief explanation of drawings]

FIG. 1 is a structural diagram of a gas insulated bus bar showing a conventional conductor support method, FIG. 2 is a front view showing the configuration of a gas insulated bus bar equipped with an example of the conductor support device of the present invention, and FIGS. 3 and 5 are partial vertical sectional views of the conductor supporting spacer of the present invention, and FIGS. 4 and 6 are sectional views taken along the - and - arrows in FIGS. 3 and 5, respectively. DESCRIPTION OF SYMBOLS 1... Bus bar container, 2... Bus bar conductor, 4... Tulip contact, 5, 5'... Bus bar conductor spacer, 7... Guide ring.

Claims (1)

[Claims] 1. In a gas-insulated bus conductor support device in which a bus conductor housed in a bus bar container is supported by a bus conductor support spacer provided with a shield fitting on the inside, the bus conductor support device supports one side of the bus conductor. A circumferential groove is provided on the inner surface of the shield fitting of the spacer, and a plurality of guide rings are provided in this groove. A support portion consisting of a plurality of screws provided is provided,
A circumferential groove provided on the inner surface of the shield fitting of the bus conductor supporting spacer that supports the other side of the bus conductor, a plurality of guide rings provided in this groove, and the outer peripheral surface of this guide ring are pressed. A conductor support device for a gas insulated bus bar, characterized in that a support portion is provided, comprising a screw provided on a shield fitting corresponding to the groove.