KR101468253B1 - Gas insulated switchgear with a disconnecting switch improved driving performances - Google Patents

Abstract

The present invention relates to a gas insulated switchgear having a disconnector with improved operational performance. The gas insulated switchgear according to the present invention is a gas insulated switchgear having a disconnector in which a movable contactor (110) slides in a closing direction or an opening direction with respect to a fixed contactor (24) in a conductor (22) A yoke 112 formed on both sides of the rear end of the yoke 110; A pin 114 inserted across the yoke 112; A driving shaft 120 rotated by an actuator; And the fixed end is coupled to the driving shaft 120 and rotates by the rotation of the driving shaft 12 and the pin 114 is inserted into the free end portion so as to be slidable in the direction toward the center of the driving shaft 12 And an insulating operation rod 130 on which a guide groove 132 is formed. The present invention is very simple in that the movable contact of the disconnector and the insulated operation rod directly slide by the pin and the guide groove to greatly simplify the operating mechanism structurally and there is no link element between the pin and the insulated operating rod, So that the motion of the insulated operating rod can be precisely and accurately transmitted to the movable contactor.

Description

TECHNICAL FIELD [0001] The present invention relates to a gas insulated switchgear with a disconnector with improved operation performance,

The present invention relates to a gas insulated switchgear having a disconnector and, more particularly, to a gas insulated switchgear having a disconnector with improved operational performance, which simplifies the mechanical structure and ensures precise and accurate operation of the movable contactor of the disconnector .

Gas Insulated Switchgear (GIS) is a power switching device used in indoor and outdoor power stations and substations. It can open and close the line safely even in abnormal conditions such as power failure, short circuit, It is a device that adequately protects the power system.

As shown in FIG. 1, the gas insulated switchgear includes a main bus 1, a disconnecting switch 2 (DS) 8, earthing switches 3 and 7 (grounding switches) A current transformer (CT) 6, a line earthing switch (LES) 9, a gas-to-air bushing 10, and an operating box 11.

In such a gas insulated switchgear, the isolators 2 and 8 are devices for opening and closing the no-load circuit, not opening and closing the load current. For example, a disconnector can be safeguarded by disconnecting the power outage completely from the power supply when the equipment is inspected and repaired, or the power transmission equipment is switched. In addition, the exciting current of the no-load transformer, the charging current of the line or the bus, or the loop current may be occasionally opened or closed for operation such as system switching.

Fig. 2 shows the structure of such a disconnecting switch. As shown in Fig. 2, the isolator has a structure that is linearly connected to the main circuit. The isolator includes an enclosure 21 filled with SF6 gas therein, a movable contact 21 A fixed contact 24 to which the movable contact 23 is connected or disengaged and a fixed contact 24 to which the movable contact 23 is moved in the closing direction (connection direction) or the opening direction And includes an operation mechanism 25, and also includes an insulating spacer 26.

Fig. 3 shows a conventional movable contact 23 and a shape of the operating mechanism 25. As shown in Fig. 3, the movable contact 23 is slidably movable in the closed direction (the left direction in the figure) or the opening direction (the right direction in the drawing) with respect to the fixed contact 24 in the conductor 22 Respectively. The operating mechanism 25 includes a drive shaft 31 rotated by an actuator not shown, an insulating operation rod 32 fixed to the drive shaft 31 and rotating, a rear end of the insulating operation rod 32 and the movable contact 23 And a connecting arm 33 connecting the parts. The pivot arm 32 and the connecting arm 33 and the connecting arm 33 and the movable contact 23 are rotatably connected by the pins 34 and 35.

This conventional disconnecting switch has a configuration in which the insulating operation rod 32 is connected to the movable contactor 23 via the connecting arm 33 so that the insulating operation rod 32 and the connecting arm 33 are rotated with respect to their respective radii of rotation . Therefore, the clearance is large due to a large number of connection points, and the relative position and angle between the insulated operating rod 32 and the pivoting arm 33 are continuously changed when moving to the open position and the closed position, There is a disadvantage. In addition, there is a disadvantage in that the number of parts is large and the apparatus becomes complicated and the size becomes large.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a gas insulated switchgear having a disconnector with an improved operating performance with a simple mechanical structure and precise and accurate operation of the movable contactor, Device.

In order to achieve the above object, a gas insulated switchgear having a disconnector with improved operating performance according to the present invention includes a disconnector in which a movable contact slides in a closing direction or a closing direction with respect to a fixed contact within a conductor A gas insulated switchgear comprising: a yoke formed on both sides of a rear end of the movable contactor; A pin inserted across the yoke; A drive shaft rotated by the actuator; And an insulated operating rod having a fixed end portion coupled to the drive shaft and pivotally moved by rotation of the drive shaft and having a free end portion formed with a guide groove into which the pin is slidably inserted in a direction toward the center of the drive shaft, .

Preferably, the pin is coupled to the outer periphery of the bearing bush and is slidably coupled to the guide groove of the insulating operation rod via the bearing bush.

According to the present invention, since the operating mechanism is structurally very simple by virtue of the direct sliding contact between the movable contactor of the disconnector and the insulated operating rod by the pin and the guide grooves, and there is no link element between the pin and the insulated operating rod, So that the movement of the insulated operation rod can be accurately and accurately transmitted to the movable contactor, thereby realizing a gas insulated switchgear having a disconnecting device with excellent operation performance.

Further, the bearing bush is engaged with the outer periphery of the pin, and the bearing is slidably engaged with the guide groove through the bearing bush, so that the sliding motion is very smooth and the abrasion due to friction can be reduced.

1 is a sectional view showing a general gas insulated switchgear.
2 is a cross-sectional view showing the structure of a conventional disconnecting switch.
3 is a cross-sectional view showing a movable contact of a conventional disconnecting switch and its operating mechanism.
4 is a cross-sectional view showing the movable contactor of the disconnector and its operating mechanism according to the present invention.
Fig. 5 is an enlarged view showing in detail the connecting portion between the movable contactor and the operating mechanism of Fig. 4;
Fig. 6 is a plan sectional view of Fig. 5; Fig.
7 is a right side sectional view cut along the center of the pin of Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 4 shows a movable contact and its operating mechanism of a disconnector according to the present invention. The same parts as those in Figs. 1 to 3 are denoted by the same reference numerals.

As shown in Fig. 4, the disconnecting switch is such that the movable contact 110 is slidably engaged with the stationary contact 24 in the closed or open direction within the conductor 22.

A driving shaft 120 is provided for rotating by the actuator for driving the movable contactor 110 and the driving shaft 120 and the movable contactor 110 are connected to each other by the insulating operation rod 130.

Specifically, a yoke 112 is formed at the rear end of the movable contactor 110 so as to be divided into two sides, and a pin 114 is inserted across the yoke 112.

The fixed end of the insulating operation rod 130 is coupled to the drive shaft 120 and rotates by the rotation of the drive shaft 12 so that the free end rotates along the circular path.

A guide groove 132 is formed at the free end of the insulating operation rod 130 and the pin 114 is slidably engaged with the guide groove 132. The guide grooves 132 are formed toward the center of the drive shaft 120. The pin 114 slides in the direction toward the center of the drive shaft 12 along the guide groove 132 when the free end of the insulating operation rod 130 rotates with the locus of the arc, The movable contactor 110 can be linearly moved even by this pivoting motion.

As the movable contact 110 and the insulating operation rod 130 are slidably engaged with the pin 114 and the guide groove 132 as described above, not only the operating mechanism is structurally very simple, but also the pin 114 The movement of the insulated operating rod 130 is accurately and accurately transmitted to the movable contactor 110 because there is no link element between the operating rod 130. [

FIGS. 5 to 7 show in detail a preferred coupling structure of the pin 114 and the insulating operation rod 130. FIG. 5 is an enlarged view of a main part of FIG. 4, and FIG. 6 is a top view of FIG. 7 is a right side sectional view cut along the center of the pin of Fig.

5 to 7, the bearing bush 116 is coupled to the outer periphery of the pin 114, and the bearing bush 116 of the bearing bush 116 is slidable in the guide groove 132 of the insulating operation rod 130 Lt; / RTI > That is, the pin 114 and the insulating operation rod 130 are slidably coupled through the bearing bush 116, so that the sliding motion is very smooth and the abrasion due to friction is reduced, thereby improving the durability.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed and will become apparent to those skilled in the art from this detailed description. It is obvious that the scope of the appended claims of the invention is included.

22: Conductor
24: Fixed contact
110: movable contactor
112: York
114: pin
116: Bearing Bush
120: drive shaft
130: Insulation operation rod
132: Information Home

Claims (2)

delete A gas-insulated switchgear comprising a disconnector whose movable contact (110) slides in a closed or open direction with respect to a fixed contact (24) in a conductor (22)
A yoke 112 formed on both sides of the rear end of the movable contact 110;
A pin 114 inserted across the yoke 112;
A driving shaft 120 rotated by an actuator; And
The fixed end portion is coupled to the drive shaft 120 and rotates by the rotation of the drive shaft 12 and the free end portion is inserted into the free end portion in such a manner that the pin 114 is slidably inserted in the direction of the center of the drive shaft 12 And an insulating operation rod (130) having an elongated groove (132) formed therein,
The pin 114 is coupled to a bearing bushing 116 on the outer periphery thereof and is slidably engaged with the guide groove 132 of the insulating operation rod 130 via the bearing bush 116. [ Wherein the gas-insulated switchgear has an improved operating performance.

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