KR101106839B1 - Connecting mechanism of conductors for switchgear - Google Patents

Abstract

The present invention is to provide a conductor connecting device for a switchgear having a first conductor and a second conductor which can improve assembly productivity with a simple structure, and according to the present invention, a cylindrical contact connected to the first conductor and having one surface open. Holder (HOLDER); And an annular spring having contact with the second conductor inserted through the open one surface of the contact holder and fitted into the contact holder and installed as one assembly together with the contact holder, comprising an electrical conductor and having an elastic spring. Disclosed is a conductor connecting apparatus for a switchgear comprising a contactor (SPRING CONTACT).

Description

CONNECTING MECHANISM OF CONDUCTORS FOR SWITCHGEAR}

The present invention relates to a conductor connecting device in a switchgear for high voltage or ultra high voltage including a gas insulated switchgear.

In the gas insulated switchgear, the conductor connecting device is a device that connects the conductors to each other during docking between functional tanks such as a breaker tank, a disconnecting tank, and a ground switch tank. When the conductor connecting device according to the present invention is connected once, the gas insulated switchgear or the tank is disconnected during operation until the tank is dismantled for maintenance, repair and transportation.

An example of the prior art in the conductor connecting device in the switchgear for high voltage or ultra high voltage is demonstrated with reference to FIG.

The conductor connecting device according to the prior art is a device that mechanically and electrically connects the first conductor 7 and the second conductor 8 having electrical conductivity, and is connected to the second conductor 8 mechanically and electrically. It may be divided into a first connecting portion (2, 3, 4, 5, 6, B2) and a second connecting portion (1, B1) connected to the first conductor (7).

From above, the first connecting portions 2, 3, 4, 5, 6, and B2 are fixed to the second conductor 8 by bolts BLT B2 to shield the arc ARC. and; The contact assembly 3, 4, 6 and the part inserted into the conductor 8 and the contact assembly 3, 4, for fixing the contact assembly 3, 4, 6 to the second conductor 8. And 6) a guide pin 5 having a flange portion for pressing 6) and a protrusion extending outwardly from the flange portion.

Here, the contact assembly 3, 4, 6 comprises: a plurality of contact fingers 4 arranged in an annular shape; A disc shaped support plate 6 which maintains an annular arrangement of the plurality of contact fingers 4 by contacting the inner diameter portions of the plurality of contact fingers 4; And a pair of springs 3 mounted on the outer circumferential surface of the contact finger 4 to impart an elastic force to the center of the contact finger 4 in the radial direction RADIIAL.

The second connecting portions (1, B1) include a contactor (1) electrically connected to the first conductor (7) and having electrical conductivity; And a bolt B1 for fixedly connecting the contactor 1 to the first conductor 7.

As shown in FIG. 1, in the state in which the contactor 1 is connected to the first conductor 7 with the bolt B1 to assemble the second connecting portions 1 and B1, the second connecting portions 1 and B1. Is inserted into contact with the lower surface of the contact finger 4 of the first connecting portion 2, 3, 4, 5, 6, B2 assembled to be connected to the second conductor 8, 2 A current flows from the conductor 8 to the first conductor 7 via the contact finger 4 and the contact 1, or conversely, the contact 1 and the contact finger 4 from the first conductor 7. The first conductor 7 and the second conductor 8 are mechanically connected at the same time as they are electrically connected to the second conductor 8 so that a current can flow therethrough.

In the high or ultra high voltage switchgear according to the prior art as described above, the conductor connecting device is contacted by a guide pin 5 of the first connecting portion 2, 3, 4, 5, 6, B2. Part 1 according to the problem that (1) is scratched and the particulate matter is generated, it is not easy to install the shield plate 2 so that the distance from the contact finger (4) is maintained, and the number of contact finger (4) configuration There was a large number and thus a number of assembly processes and there was a problem that the productivity is lowered.

Accordingly, the present invention solves the problems of the prior art, and an object of the present invention is to provide a conductor connecting device for a switchgear which can simplify assembly and improve assembly productivity and also suppress dust generation from a contactor. will be.

An object of the present invention is for a switch gear having a first conductor and a second conductor connected to the first conductor.

A cylindrical contact holder (HOLDER) connected to the first conductor and having one surface open; And

An annular spring contact which is in contact with the second conductor inserted through the open one side of the contact holder and which is fitted into the contact holder and can be installed as an assembly together with the contact holder, which is composed of an electrical conductor and has elasticity It can be achieved by providing a conductor connecting device for a switchgear according to the invention, characterized in that it comprises a (SPRING CONTACT).

According to the present invention, there is no installation of an arc shield plate and a plurality of contact fingers, and the connection device is configured as one assembly to simplify the structure of the conductor connection device, thereby greatly reducing manufacturing costs and greatly improving assembly productivity. You can get it.

Since the present invention does not have a guide pin of the prior art, there is an effect that the possibility of dust is generated by scratching between the guide pin and other components during the connection (assembly) between the conductors by the conductor connecting device.

The present invention further includes a supporting member for supporting the contact portion of the second conductor, so that the connecting force between the second conductor and the connecting device can be obtained with a stable effect.

In the present invention, the support member is a support member made of polyethylene tetrafluoride (abbreviated as polytetra fluoro ethylene, also called PTFE), and has excellent contact force, abrasion resistance, heat resistance, and low coefficient of friction by the properties of the material. Can be obtained.

According to the present invention, since the contact holder has a communication portion communicating the inside and the outside of the contact holder so as to reduce the pressure difference between the inside and the outside, the contact holder and the second part are formed by the pressure rise or the vacuum formation inside the contact holder. The phenomenon that the contact and disconnection of the conductor is not easy can be prevented.

In the present invention, since the spring contact is configured by forming an electrically conductive metal coil (COIL) in an annular shape, it is also easy to manufacture an annular metal coil and assembling the contact holder formed by a predetermined width smaller than the annular coil. By inserting it into the groove portion, it is possible to obtain an effect that the position can be maintained simply assembled and touched.

In the present invention, the spring contact has a silver (Ag) plating layer plated on the surface of the annular conductor of the metallic coil having conductivity, so that an excellent conductivity can be obtained.

1 is a longitudinal cross-sectional view showing the configuration of an example of a conductor connecting device in a switchgear for a high voltage or ultra high voltage according to the prior art,
2 is a longitudinal cross-sectional view of a conductor connecting device for a switchgear according to an embodiment of the present invention;
3 is a front view of a conductor connecting device for a switchgear according to an embodiment of the present invention as viewed along line YY of FIG.
Figure 4 is a perspective view showing the outer shape of the contact holder of the conductor connection device for a switch gear according to an embodiment of the present invention.

The object of the present invention and the constitution and effects of the present invention to achieve the same will be more clearly understood by the following detailed description of the preferred embodiment of the present invention with reference to the accompanying drawings.

1 is a longitudinal cross-sectional view showing the configuration of an example of a conductor connecting device in a switchgear for a high voltage or ultra-high voltage according to the prior art, Figure 2 is a longitudinal cross-sectional view of a conductor connecting device for a switch gear according to an embodiment of the present invention. 3 is a front view of a conductor connection device for a switchgear according to an embodiment of the present invention as seen along the line Y-Y 'of FIG. 2, and FIG. 4 is a conductor for a switchgear according to an embodiment of the present invention. It is a perspective view which shows the external appearance of a contact holder in a connection apparatus.

2, the switchgear to which the present invention is applied includes a first conductor 13 and a second conductor 20, 20a. The first conductor 13 may be formed of, for example, a rectangular bar-shaped or cylindrical member formed of a metal material having electrical conductivity, and may be provided at a connection end of an enclosure for each function of the switchgear. The second conductors 20 and 20a may be configured to include the second conductor portion 20 and the contact portion 20a, and may be provided at connection ends of other functional enclosures of the switchgear. The second conductor portion 20 may also be composed of, for example, a rectangular bar shape or a cylindrical member formed of a metal material having electrical conductivity. The contact portion 20a is integrally formed at the end of the second conductor portion 20 with a smaller diameter (or smaller in height in the case of a quadrangle) than the second conductor portion 20, and has an open surface of the contact holder 10. It enters through and becomes a contact part of the 2nd conductor part 20 which contacts the spring contact 11.

The conductor connecting device for a switch gear according to an exemplary embodiment of the present invention may be installed in a box-shaped or cylindrical outer box (tank) for each function of the switch gear, not shown.

The conductive connection device for a switchgear according to an exemplary embodiment of the present invention may include a contact holder 10 and a spring contact 11 as shown in the illustrated embodiment. It may be configured to further include a support member (12).

The contact holder 10 may be composed of a cylindrical metal member which is mechanically and electrically connected to the first conductor 13 and is open at one side (open at the left side in FIG. 2). As the contact holder 10 may have an external shape as shown in FIG. 4, the outer surface may be formed of a metal member having a substantially constant cylindrical shape except for both ends thereof, and the inner surface of the contact holder 10 may be referred to FIG. 2. The second inner diameter surface having a first inner diameter surface 10a having a first diameter d2 and a second diameter d1 larger than the first diameter d2 on a side close to the open one surface as can 10b). The inner space formed by the second inner diameter surface 10b provides a space for installing the bolt B3. The communication portion 10c is provided in the contact holder 10 so as to communicate with the inner space of the contact holder 10. The communication unit 10c may communicate the inside and the outside of the contact holder 10 so as to reduce the pressure difference between the inside and the outside of the contact holder 10. That is, a phenomenon in which contact and separation between the second conductors 20 and 20a and the contact holder 10 may not be easy due to an internal pressure increase or vacuum formation in the contact holder 10 may be prevented. In addition, the first inner diameter surface 10a of the contact holder 10 accommodates and supports the first assembly groove portion 10d for receiving and supporting the spring contactor 11 to be described later, and the support member 12 to be described later. The second assembling groove 10e is provided. Preferably, the first assembling groove 10d corresponds to the outer surface of the spring contact 11 having a curved longitudinal section, and the first assembling groove 10d is formed as a groove having a curved longitudinal section, as shown in FIG. Corresponding to the outer surface shape of the member 12, the second assembly groove portion 10e is formed as a groove portion having a longitudinal cross section as shown in FIG.

As can be seen in Figure 2, the spring contact 11 is inserted into the contact holder 10 is installed. More specifically, the spring contact 11 is inserted into and installed in the first assembling groove 10d of the first inner diameter surface 10a in the contact holder 10 whose longitudinal section is curved as described above.

In order to prevent the spring contact 11 from being separated, the diameter d3 between the upper and lower surfaces of the first assembling groove portion 10d of the first inner diameter surface 10a of the contact holder 10 is shown in FIG. 2. It is formed by a predetermined degree smaller than the uncompressed original diameter of the spring contact 11. Therefore, under the state of being compressed by the first assembling groove portion 10d having a predetermined diameter smaller than the uncompressed original diameter, the spring contact 11 is assembled in the first assembling groove portion 10d, so that the spring contact 11 The elastic restoring force acts in the outward direction away from the radial center of the spring contact 11, and when the spring contact 11 is assembled to the first assembling groove 10d, it is easily prevented from detaching.

The spring contact 11 is composed of an electrical conductor and has an annular shape having elasticity. In other words, the spring contact 11 can be formed by forming an annular metal coil COIL having electrical conductivity. Preferably, the spring contact 11 has a silver (Ag) plating layer plated on the surface of the annular conductor of the metallic coil so as to further improve the electrical conductivity of the spring contact 11.

As described above, the conductor connecting device for the switchgear according to the preferred embodiment of the present invention may further include a support member 12. The support member 12 is installed by being inserted into the contact holder 10. That is, as described above with reference to FIG. 2, the support member 12 is inserted into the second assembling groove 10e of the first inner diameter surface 10a of the contact holder 10 to be installed. The contacts 20a of 20 and 20a support the contacts 20a when they are inserted through the open one surface of the contact holder 10. As shown in FIG. 2, the support member 12 may be formed of a synthetic resin support member having a rectangular longitudinal section and having a rectangular window shape. The support member 12 is generally called Tefron and is used as a gasket, packing, various seal materials and also used as a floor coating material for reducing friction of a frying pan. It may consist of a member made of tetra tetrafluoro ethylene (also abbreviated as PTFE). By the properties of the material, i.e., tetrafluoride polyethylene, the support member 12 can obtain excellent contact force, wear resistance, heat resistance, and low coefficient of friction.

In addition, the conductor connecting device for the switchgear according to the preferred embodiment of the present invention, the assembly of the contact holder 10, the spring contact 11 and the support member 12 fixedly connected to the first conductor (13). It may further include a bolt (B3). The bolt B3 is formed through a bolt hole provided with four threaded surfaces preferably formed in four locations along the radial direction as shown in FIG. 3 of the occluded wall opposite to the open one of the contact holders 10. It is inserted and screwed into the screw hole corresponding to the 1 conductor 13, and fixedly connects the assembly of the contact holder 10, the spring contact 11, and the support member 12 to the 1st conductor 13. As shown in FIG.

On the other hand, the assembly process of the conductor connection device for a switchgear according to an embodiment of the present invention configured as described above will be briefly described.

The assembling process of the first conductor side of the conductor connecting apparatus according to the present invention will be described.

First, the contact holder 10 is prepared.

Next, as shown in FIG. 3 in the closed side wall of the contact holder 10 opposite to the opened one side, through the bolt hole provided with the screw surface formed in four places preferably along the radial direction, the bolt ( By inserting and screwing B3) into the screw hole formed corresponding to the first conductor 13, the contact holder 10 is positioned to be connected to the first conductor 13. At this time, when the bolt B3 is fastened by using a wrench that can tighten the bolt located in an oblique direction from the application position of the operating force, the bolt B3 is smoothly prevented from being disturbed by the first inner diameter surface 10a. Can be tightened.

Next, the spring contact 11 is fitted into the first assembly groove 10d of the contact holder 10.

Next, the support member 12 is fitted into the second assembly groove portion 10e of the contact holder 10.

Next, when the contact portion 20a of the second conductors 20 and 20a is inserted through the open side of the contact holder 10, the surface of the contact portion 20a is pre-assembled with the spring contactor (assembled in the contact holder 10). As the contact portion 20a is supported by the support member 12 while being in contact with 11), the assembly of the conductor connecting device for the switch gear according to the preferred embodiment of the present invention is completed.

Next, the current flow operation of the conductor connection device for a switchgear according to the preferred embodiment of the present invention constructed and assembled as described above will be described.

As described above, in the assembled (connected) state, current flows from the second conductor portion 20 to the first conductor 13 through the contact portion 20a, the spring contact 11, and the contact holder 10, or On the contrary, a current may flow from the first conductor 13 to the second conductor portion 20 through the contact holder 10, the spring contact 11, and the contact portion 20a.

1: contact 2: shield
3: spring 4: contact finger
5: guide pin 6: support plate
7: first conductor 8: second conductor
10: contact holder 10a: first inner diameter surface
10b: 2nd inner diameter surface 10c: communicating part
10d: first assembling groove 10e: second assembling groove
11: spring contact 12: support member
13: first conductor 20: second conductor portion
20a: contact portion B1: bolt
B2: bolt B3: bolt

Claims (7)

In the switchgear conductor connecting device having a first conductor and a second conductor connected to the first conductor,
A cylindrical contact holder (HOLDER) connected to the first conductor and having one surface open; And
An annular spring contact which is in contact with the second conductor inserted through the open one side of the contact holder and which is fitted into the contact holder and can be installed as an assembly together with the contact holder, which is composed of an electrical conductor and has elasticity (SPRING CONTACT);
The contact holder,
And a communicating portion communicating the inside and the outside of the contact holder so as to reduce the pressure difference between the inside and the outside. The method of claim 1,
And a support member inserted into the contact holder and supporting the second conductor when the second conductor is inserted through an open surface of the contact holder. The method of claim 2,
The support member,
A conductor connecting device for a switchgear, characterized in that the support member is made of tetratetra fluoro ethylene. delete The method of claim 1,
The spring contactor,
A conductive connection device for a switchgear, characterized by forming an annular metal coil having electrical conductivity in an annular shape. The method of claim 5,
The spring contactor,
And a silver plating layer plated on the surface of the annular conductor of the metallic coil. The method of claim 1,
The contact holder includes an assembly groove for receiving and supporting the spring contact,
And a diameter between the upper and lower surfaces of the assembling groove is smaller than a predetermined uncompressed diameter of the spring contact by a predetermined degree.

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