KR20190019741A - Conductor connecting apparatus for gas insulated switchgear - Google Patents

Abstract

The present invention relates to a conductor connection device for a gas insulation switchgear. The conductor connection device of the present invention electrically connects a main conductor (30) to a connecting conductor (20). An insertion end portion (34) is formed on a front-end portion of the main conductor (30). An insertion space (22) open to one side is formed in the connecting conductor (20). The insertion end portion (34) is inserted in the insertion space (22) and, consequently, an electric connection is performed. A connection groove (24) is formed on the inside of the insertion space (22) and a contact elastic member (24) is mounted on the connection groove (24). The contact elastic member (24) comes in close contact with the outside of the insertion end portion (34) of the main conductor (30). A mounting groove (26) is formed to be close to the connection groove (24). On the mounting groove (26), a wear ring (27) is located and generates frictional force between the insertion end portion (34) and the same to make a joining state between the main conductor (30) and the connecting conductor (20) tight. On the connecting conductor (20), a communication slot (28) is formed in a lengthwise direction of the connecting conductor (20) to make the insertion space (22) and the outside communicate with each other. A communication slot (36) is formed in a lengthwise direction also on the insertion end portion (34) of the main conductor (30) to make a through-hole (32) in the main conductor (30) and the outside communicate with each other. According to the present invention, as natural convection occurs through the communication slot (28) of the connecting conductor (20) and the communication slot (36) of the main conductor (30), heat dissipation is performed in a smooth manner.

Description

TECHNICAL FIELD [0001] The present invention relates to a gas insulated switchgear,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a conductor connecting apparatus for a gas insulated switchgear, and more particularly, to a conductor connecting apparatus for connecting a main conductor and a connecting conductor for performing electrical connection inside an enclosure.

Gas Insulated Switchgear (GIS) is a power transformer facility that improves reliability by storing insulating materials such as conductors and various protection devices using insulated gas, which is excellent in insulation performance and SO function, in a closed container made of metal. A grounding switch, and the like.

In such a gas insulated switchgear, the conductors are connected in the interior of the sealed container to realize an electrical connection. These conductors are connected to each other in the sealed container. In general, the conductors are connected to the connection conductors provided on both sides of the spacer.

Here, the connection conductors are generally provided integrally with the spacers provided at the ends of the hermetically sealed container. The main conductors of the adjacent hermetically sealed containers are electrically connected to each other by connecting the main conductors at both ends to the connection conductors provided on the spacers.

In this case, the main conductor and the connection conductor are inserted into one side of the other side in a plug-in manner without using fasteners such as bolts. This is because the electric field distribution can be improved by not using the bolts. Such a method is disclosed in Korean Patent Laid-Open No. 10-2014-0134537, which is a prior art document given below.

However, in such a connection structure, since the insulator is coupled to the inside of the connecting conductor by being press-fitted into the connecting conductor, the insulating gas inside the sealed container can not flow into the connecting conductor, There is a problem that does not exist.

Korean Patent Publication No. 10-2014-0134537

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas insulated switchgear for dissipating heat generated at a contact portion between a main conductor and a connection conductor to the outside in a gas insulated switchgear.

According to an aspect of the present invention for achieving the above object, the present invention provides a connector comprising: a connection conductor provided in a spacer and having an insertion space formed therein; and a connection conductor inserted in the insertion space of the connection conductor and electrically connected to the connection conductor A main conductor and a communication slot formed at a predetermined angular interval to open to the outer surface of the connection conductor and communicating the insertion space with the outside.

The communication slots formed in the connection conductors are formed in the longitudinal direction of the connection conductors, and a plurality of the communication slots are formed with a predetermined interval.

An insertion end portion inserted into the insertion space of the connection conductor is formed at an end of the main conductor, a through hole is formed in the insertion end portion, and a communication slot is formed in a longitudinal direction of the insertion end portion so as to communicate with the outside .

A plurality of communication slots formed in the main conductor have a predetermined interval.

The communication slot formed in the connection conductor and the communication slot formed in the main conductor are disposed to be shifted from each other.

A predetermined space is formed between the tip of the insertion end and the inner surface of the insertion space when the step is hooked on the insertion space entrance of the connection conductor do.

And a contact groove is formed on the inner surface of the insertion space to fix the contact elastic member to the outer surface of the insertion end to electrically connect to the insertion groove and a seating groove is formed on the inner surface of the insertion space adjacent to the connection groove, And contacts the outer surface of the insertion end to provide a frictional force.

The following effects can be obtained in the conductor connecting device of the gas insulated switchgear according to the present invention.

In the present invention, the main conductor and the communication slot for communicating the inside and the outside of the connecting conductor are respectively formed at a portion where the main conductor and the connecting conductor are coupled to each other. The communication slot allows the passage of the main conductor and the insertion space of the connection conductor to communicate with the outside, thereby allowing the natural convection of the insulating gas. According to this structure, since the natural convection of the insulating gas serves to discharge heat to the outside, the heat generated at the joint portion between the main conductor and the connecting conductor can be smoothly discharged to the outside, so that the electrical connection characteristic And the durability of the product is improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a configuration of a preferred embodiment of a conductor connecting device of a gas insulated switchgear according to the present invention; FIG.
2 is a longitudinal sectional view showing the configuration of an embodiment of the present invention.
3 is a perspective view showing a configuration of a connection conductor constituting an embodiment of the present invention.
4 is a perspective view showing a configuration of a main conductor constituting an embodiment of the present invention.
5 is a cross-sectional view showing a path through which air can flow in the embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals even though they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the understanding why the present invention is not intended to be interpreted.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

As shown in the figures, the spacer 10 is formed by the spacer body 12 with an external appearance and a skeleton. The spacer body 12 is made of an insulating synthetic resin and has a shape corresponding to an end shape of a closed container (not shown) connected to each other. Generally, the spacer body 12 has a disc shape. Although there is a configuration for coupling with the hermetically sealed container along the edge of the spacer body 12, it is not shown for the sake of convenience in the drawings.

There is an intermediate conductor 14 passing through the center of the spacer body 12. The intermediate conductor 14 is made of a conductive material, and is integrated with the spacer body 12. For example, the intermediate conductor 14 may be inserted into a mold for forming the spacer body 12, and the intermediate conductor 14 may be integrated with the spacer body 12 through insert injection. The intermediate conductor 14 is installed through the spacer body 12. Accordingly, the intermediate conductor 14 is exposed to both sides of the spacer body 12. [ The intermediate conductor 14 is formed with a fastening hole 16 for fastening the connection conductor 20 to be described below.

For reference, the intermediate conductor 14 can be made integral with the connection conductor 20, which will be described below. That is, the intermediate conductor 14 and the connecting conductor 20 are integrally formed from the beginning without being fastened with fasteners as described below, inserted into a mold for forming the spacer body 12, Can be integrally formed with the spacer body 12.

In this embodiment, the connection conductor 20 is coupled to the intermediate conductor 14 of the spacer 10. The connection conductor 20 is also made of a conductive material. Although not shown in the drawings, the connection conductors 20 are mounted on both sides of the spacer 10. That is, the connection conductors 20 are mounted on the intermediate conductors 14 exposed on both sides of the spacer body 12. Of course, as described above, the connecting conductor 20 may be made integral with the intermediate conductor 14.

The connection conductors 20 are formed into a cup shape. An insertion space 22 is formed in the connection conductor 20 so that the insertion space 22 is opened to the opposite side of the connection with the intermediate conductor 14. Reference numeral 23 denotes a fastening hole formed at a position corresponding to the fastening hole 16 of the intermediate conductor 14 so that the fastening hole passes therethrough.

On the inner surface of the insertion space 22, a connection groove 24 is formed in a circular shape. A contact elastic member (25) is provided in the connection groove (24). The contact elastic member 25 is provided to allow the electrical connection between the connection conductor 20 and the main conductor 30 to be described later. The contact elastic member 25 is ring-shaped and seated in the connection groove 24. [

In the inner surface of the insertion space 22, a seating groove 26 is also formed in a circular shape. A wear ring (27) is installed in the seating groove (26). The wear ring 27 is brought into close contact with the surface of the insertion end 34 of the main conductor 30 to be described below when the material is Teflon and the main conductor 30 is attached to the connection conductor 20 ) In order to avoid any disconnection.

The connection conductors 20 are formed with a plurality of communication slots 28 in the longitudinal direction. The communication slot 28 is formed up to the entrance edge of the insertion space 22 and is opened to the distal end of the connection conductor 20. The communication slot 28 allows the insertion space 22 to communicate with the outside. The communication slots 28 may be formed with a predetermined angular interval. In the illustrated embodiment, communication slots 28 are formed at 180 degree intervals. The communication slots 28 may be formed at intervals of 120 degrees or 90 degrees. Since the communication slot 28 is provided, the flow of air into the insertion space 22 of the connection conductor 20 can be facilitated.

The main conductor 30 is coupled to the connection conductor 20 to perform an electrical connection. The main conductor 30 is also made of a conductive material. The main conductor 30 is cylindrical as shown in FIG. Of course, the main conductor 30 may have a cylindrical shape. That is, the inside of the main conductor 30 may be hollow or solid. In this embodiment, a through hole 32 is formed through the inside of the main conductor 30. [

An insertion end portion (34) is formed at an end of the main conductor (30). The insertion end portion 34 is a portion inserted into the insertion space 22 of the connection conductor 20. The insertion end (34) has an outer diameter substantially equal to the inner diameter of the insertion space (22). The insertion end (34) has a step (35). The step 35 serves to regulate the extent to which the insertion end 34 is inserted into the insertion space 22 of the connection conductor 20. A predetermined gap is formed between the tip end of the insertion end portion 34 and the inner surface of the insertion space 22 when the insertion end portion 34 is inserted into the insertion space 22 by the step 35 . That is, the distance of the insertion end portion 34 is shorter than the distance from the entrance to the inner surface of the insertion space 22, so that a predetermined clearance is formed in the insertion space 22.

A plurality of communication slots 36 are formed in the insertion end portion 34 in the longitudinal direction of the insertion end portion 34. The communication slots (36) may be formed at a predetermined angular interval as in the communication slots (28) of the connection conductors (20). In the illustrated embodiment, the communication slots 36 are formed at intervals of 180 degrees. The communication slot (28) serves to communicate the through hole (32) with the outside.

Hereinafter, the use of the conductor connecting device of the gas insulated switchgear according to the present invention will be described in detail.

In the present invention, the connection conductor 20 and the main conductor 30 are used in combination. The connecting conductor 20 is coupled to the intermediate conductor 14 of the spacer 10. The fasteners penetrate through the fastening holes 16 of the intermediate conductor 14 and the fastening holes 23 of the connecting conductor 20 to engage them. Accordingly, the connection conductor 20 and the intermediate conductor 14 are coupled to each other and electrically connected.

The contact elastic member 25 is located in the contact groove 24 formed in the insertion space 22 of the connection conductor 20 and the wearer 27 is seated in the seating groove 26, 30 are coupled to the connection conductor 20. The insertion end portion 34 of the main conductor 30 is inserted into the insertion space 22 of the connection conductor 20. At this time, since the inner diameter of the insertion space 22 is substantially equal to the outer diameter of the insertion end portion 34, the connection conductor 20 can be slightly elastically deformed by the presence of the communication slot 28. The connection conductor 20 is resiliently deformed by insertion of the insertion end portion 34 of the main conductor 30 and is restored to the contact elastic member 25 on the outer surface of the insertion end portion 34 of the main conductor 30, And the wearer 27 are put on the market.

The extent to which the insertion end 34 of the main conductor 30 is inserted into the insertion space 22 of the connection conductor 20 is regulated by the step 35. The degree of the insertion of the insertion end portion 34 into the insertion space 22 is set by the step 35 being hooked on the edge of the entrance of the insertion space 22 of the connection conductor 20.

The main conductor 30 and the connection conductor 20 are electrically connected by inserting the insertion end portion 34 of the main conductor 30 into the insertion space 22 of the connection conductor 20, The connecting conductor 20 is electrically connected to the intermediate conductor 14 of the spacer 10. The intermediate conductor 14 of the spacer 10 is provided with connecting conductors 20 at both ends thereof and the main conductors 30 are coupled to the connecting conductors 20 to connect the main conductors 30 to each other. Electrical connection is made.

Between the inner surface of the insertion space 22 and the outer surface of the insertion end portion 34 of the main conductor 30, the portion of the main conductor 30 and the connection conductor 20, The elastic member 25 is positioned so that the electrical connection between the main conductor 30 and the connecting conductor 20 is correct.

The wear ring 27 is brought into close contact with the outer surface of the insertion end portion 34 of the main conductor 30 to generate frictional force so that the main conductor 30 does not come out of the connection conductor 20 at random. That is, the wearer 27 provides a certain degree of frictional force so that the main conductor 30 is fixed in the connection conductor 20.

In this way, in a state where the main conductor 30 is coupled to the connection conductor 20, the spacers 10 with the connection conductor 20 are positioned between the adjacent airtight containers, and the main conductors 30 Are electrically connected to each other. This is because the main body 30 is coupled to the connection conductors 20 on both sides of the spacer 10 so that the main conductors 30 are electrically connected through the intermediate conductor 14 Lt; / RTI >

In the present invention, the main conductor 30 is inserted into the insertion space 22 of the connection conductor 20, and the communication between the communication slot 28 of the connection conductor 20 and the main conductor 30 The insertion space 22 inside the connection conductor 20 is communicated with the outside by the slot 36. Particularly, the through hole 32 of the main conductor 30 and the insertion space 22 are communicated with each other, Natural convection of the insulated gas in the space 22 can occur. The heat generated in the insertion space 22 may be discharged to the outside through the communication slot 28 of the connection conductor 20.

In addition, natural convection of the insulating gas may occur between the through hole 32 of the main conductor 30 and the outside, that is, between the insertion space 22. This is done by the communication slot 36 formed in the insertion end 34 of the main conductor 30.

5, the insulating gas filled in the sealed container between the through hole 32, the insertion space 22, and the outside moves while the connection between the main conductor 30 and the connecting conductor 20 The generated heat can be released to the outside.

Since the heat generated at the connection portion between the main conductor 30 and the connection conductor 20 is well discharged to the outside as described above, the electrical connection performance between the main conductor 30 and the connection conductor 20 is improved, And the durability of the connecting conductor 20 is also improved.

While the present invention has been described in connection with what is presently considered to be the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

In the illustrated embodiment, a communication slot 28 is formed in the connection conductor 20 and a communication slot 36 is formed in the main conductor 30. However, the connection conductor 20 and the main conductor 30 The heat may be dissipated even if the communication slot 20 is formed only in the external connection conductor 20.

In this embodiment, the communication slot 28 of the connection conductor 20 and the communication slot 36 of the main conductor 30 are formed to be shifted from each other. Of course, the communication slots 28 and 36 may be formed to coincide with each other. However, the misaligned flow of the insulating gas may occur over the entire insertion end 34 of the main conductor 30, Can be more effective.

10: spacer 12: spacer body
14: intermediate conductor 16: fastening hole
20: connection conductor 22: insertion space
24: insertion groove 25: contact elastic member
26: seat groove 27: wear ring
28: communication slot 30: main conductor
32: through hole 34: insertion end
35: step 36: communication slot

Claims (7)

A connection conductor provided in the spacer and having an insertion space formed therein,
A main conductor inserted into the insertion space of the connection conductor and electrically connected to the connection conductor,
And a plurality of communication slots formed at predetermined angular intervals to open to the outer surface of the connection conductor, the communication slots communicating the insertion space with the outside.
The apparatus of claim 1, wherein the communication slots formed in the connection conductors are formed in a longitudinal direction of the connection conductors, and a plurality of the communication slots are formed with a predetermined gap.
The connector according to claim 2, wherein an end of the main conductor is formed with an insertion end to be inserted into the insertion space of the connection conductor, a through hole is formed in the insertion end, And a communication slot is formed in the gas insulated switchgear.
The apparatus of claim 3, wherein a plurality of communication slots formed in the main conductor have a predetermined gap.
5. The apparatus of claim 4, wherein the communication slot formed in the connection conductor and the communication slot formed in the main conductor are disposed to be shifted from each other.
The connector according to any one of claims 1 to 5, characterized in that the insertion end is formed with a step so that it is hooked to the insertion space entrance of the connection conductor, and when the step is hooked on the insertion space entrance of the connection conductor, And a predetermined space is formed between the inner surface of the insertion space and the inner surface of the insertion space.
7. The connector according to claim 6, wherein a connection groove is formed in the inner surface of the insertion space, the contact elastic member is seated on the outer surface of the insertion end to electrically connect to the insertion space, And the wear ring is seated and brought into contact with the outer surface of the insertion end to provide a frictional force.

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