KR20120015605A - Gas insulated switchgear with a disconnecting switch improved driving performances - Google Patents

Abstract

PURPOSE: A gas insulated switchgear with a disconnecting switch improved driving performances is provided to improve the durability by reducing abrasion due to rubbing by being combined in the guide groove of an insulating operation bar through a bearing bush to be slid. CONSTITUTION: A yoke(112) is formed in the back-end of a movable contact(110). A pin(114) is inserted across the yoke. A bearing bush is combined with the circumference of the pin. A driving shaft(120) is rotated by an actuator. An insulation operating bar(130) comprises a guide long groove(132).

Description

GAS INSULATED SWITCHGEAR WITH A DISCONNECTING SWITCH IMPROVED DRIVING PERFORMANCES}

The present invention relates to a gas insulated switchgear having a disconnector, and more particularly, to a gas insulated switchgear having a disconnector having improved operation performance in which the operation of the movable contactor of the disconnector is made precisely and accurately and the mechanical structure is simplified. It is about.

Gas Insulated Switchgear (GIS) is a power switch used in indoor and outdoor power plants and substations.It is used to safely open and close lines in abnormal conditions such as power accidents and short circuits as well as normal switching. Appropriate protection of power system.

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

In such a gas insulated switchgear, the disconnectors 2 and 8 are devices that open and close a no-load circuit, not open and close a load current. For example, the disconnector completely separates the power outage from the power supply during the inspection and repair of the equipment to ensure safety, or transfer the water substation facility. In addition, in some cases, such as switching of the system, the excitation current of the no-load transformer, the charging current of the line or bus, or the loop current may be opened or closed.

2 shows the structure of such a disconnector. As shown in FIG. 2, the disconnector has a structure connected in a straight line with the main circuit, and includes an enclosure 21 filled with SF6 gas therein and a movable contactor moving left and right in the drawing inside the conductor 22. 23, the fixed contactor 24 to which the movable contactor 23 is connected or detached, and the movable contactor 23 to drive in the closed pole direction (connection direction) or the open electrode direction (release direction) with respect to the fixed contactor 24. The operation mechanism 25 is included, and the insulation spacer 26 is also included.

3 shows the form of a conventional movable contact 23 and an operating mechanism 25. As shown in FIG. 3, the movable contact 23 is slidably movable in the closed pole direction (left direction on the drawing) or in the open direction (right direction on the drawing) with respect to the fixed contactor 24 inside the conductor 22. It is inserted. The operation mechanism 25 is the rear end of the drive shaft 31 which rotates by the actuator which is not shown in figure, the insulated operating rod 32 fixed to the drive shaft 31, and rotating, the insulated operating rod 32, and the movable contact 23. As shown in FIG. It consists of a connecting arm 33 for connecting the part. The rotation arm 32 and the connection arm 33, the connection arm 33 and the movable contact 23 are pivotally connected by pins 34 and 35.

In the conventional disconnector, since the insulated operating rod 32 is connected to the movable contactor 23 through the connecting arm 33, the insulated operating rod 32 and the connecting arm 33 have their own rotation radius. Move with As a result, there are many connecting points, so that the play is greatly generated, and the relative position and angle of the insulation operating rod 32 and the rotation arm 33 are continuously changed when moving to the open position and the closed position, thereby degrading the precision and accuracy of the operation. Has its drawbacks. In addition, the number of parts has a disadvantage that the device is complicated and the size is also large.

The present invention has been developed to solve the above-mentioned conventional problems, the object of the present invention is the gas insulated switchgear having a disconnector with improved operation performance of the movable contactor is made precisely and accurately, and has a simple mechanical structure To provide a device.

In order to achieve the above object, a gas insulated switchgear having a disconnecting device with improved operating performance according to the present invention, the movable contactor is provided with a disconnecting device in which the movable contact slides in the closed or open direction with respect to the fixed contact. A gas insulated switchgear, comprising: a yoke formed on both sides of a rear end of the movable contact to be split into two sides; A pin inserted across the yoke; A drive shaft rotated by an actuator; And an insulated operating rod having a fixed end coupled to the drive shaft, the guide shaft being rotatably inserted by the rotation of the drive shaft, and the guide end groove being freely inserted into the pin in a direction toward the center of the drive shaft. It is characterized by.

In addition, the pin, the bearing bush is coupled to the outer circumference, it is preferable to be coupled to the guide cabinet groove of the insulated operating rod to be slidable through the bearing bush.

According to the present invention, since the movable contactor of the disconnecting device and the insulated operating rod are directly slid by the pin and the guide groove, the operating mechanism becomes very simple in structure, and there is no link element between the pin and the insulated operating rod. This very concise, the movement of the insulating operating rod is accurately and accurately transmitted to the movable contact, it is possible to implement a gas insulated switchgear having a disconnector with excellent operation performance.

In addition, by coupling the bearing bush to the outer periphery of the pin and slidingly engaging with the guide long groove through the bearing bush thereof, the sliding movement is made very smoothly, and the wear caused by the friction can be reduced, thereby improving durability.

1 is a cross-sectional view showing a general gas insulated switchgear.
2 is a cross-sectional view showing the structure of a conventional disconnector.
3 is a cross-sectional view showing a movable contactor and its operation mechanism of a conventional disconnector.
4 is a cross-sectional view showing a movable contactor and its operation mechanism of the disconnector according to the present invention.
FIG. 5 is an enlarged view illustrating in detail a connection portion between the movable contact and the operation mechanism of FIG. 4. FIG.
6 is a cross-sectional view of FIG. 5.
FIG. 7 is a right cross-sectional view taken along the center of the pin of FIG. 5.

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

Figure 4 shows the movable contact of the disconnector according to the invention and its operating mechanism. The same parts as in Figs. 1 to 3 will be described with the same reference numerals.

As shown in FIG. 4, the disconnecting device has a movable contact 110 coupled to the inside of the conductor 22 so as to be slidably movable in the closed or open direction with respect to the fixed contact 24.

The drive shaft 120 is rotated by an actuator for driving the movable contact 110, the drive shaft 120 and the movable contact 110 are connected to the insulating operating rod 130.

Specifically, the yoke 112 is formed at both rear ends of the movable contact 110 so as to be divided into both sides, and the pin 114 is inserted across the yoke 112.

The fixed operation rod 130 has its fixed end coupled to the drive shaft 120 and rotated by the rotation of the drive shaft 12 so that the free end rotates along the arc of the arc.

The guide end groove 132 is formed at the free end of the insulation operating rod 130, and the pin 114 is slidably coupled to the guide long groove 132 thereof. The guide long groove 132 is formed toward the center of the drive shaft 120. When the free end of the insulating operating rod 130 is rotated by the trajectory of the arc, the pin 114 is slid in the direction toward the center of the drive shaft 12 along the guide long groove 132, thereby insulated operating rod 130 Even with this rotational movement, the movable contact 110 can move linearly.

As the movable contact 110 and the insulated operating rod 130 are slidly coupled by the pin 114 and the guide slot 132 as described above, the operation mechanism is not only structurally simple but also insulated from the pin 114. Since there are no link elements between the operating rods 130, the operation becomes very concise, and the movement of the insulating operating rods 130 is accurately and accurately transmitted to the movable contact 110. FIG.

5 to 7 show in detail a preferred coupling structure of the pin 114 and the insulating operating rod 130, Figure 5 is an enlarged view of the main portion of Figure 4, Figure 6 is a cross-sectional view of Figure 5, FIG. 7 is a right cross-sectional view cut along the center of the pin of FIG. 5.

As shown in FIGS. 5 to 7, the bearing bush 116 is coupled to the outer circumference of the pin 114, and the bearing bush 116 thereof is slidable to the guide long groove 132 of the insulation operating rod 130. To be combined. That is, the pin 114 and the insulating operating rod 130 is slid through the bearing bush 116, so that the sliding movement is made very smoothly, wear due to friction is reduced and durability is improved.

In the above, specific embodiments of the present invention shown in the accompanying drawings have been described in detail, but this is only one preferred example, and the protection scope of the present invention is not limited to the above-described embodiments. In addition, the embodiments of the present invention as described above can be variously modified and equivalent other embodiments by those of ordinary skill in the art within the technical spirit of the present invention, such modifications and equivalent other embodiments are Naturally, it belongs to the attached claims of the invention.

22: conductor
24: fixed contact
110: movable contactor
112: York
114: pin
116: Bearing Bush
120: drive shaft
130: insulated operating rod
132: Guide Chapter

Claims (2)

A gas insulated switchgear having a disconnecting device in which a 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 at both rear ends of the movable contact 110 to be divided at both sides;
A pin 114 inserted across the yoke 112;
A drive shaft 120 rotated by an actuator; And
The fixed end is coupled to the drive shaft 120 is rotated by the rotation of the drive shaft 12, the free end is guided so that the pin 114 is slidably inserted in the direction toward the center of the drive shaft 12 Gas insulated switchgear having a disconnector with improved operating performance, characterized in that it comprises an insulated operating rod 130 is formed with a long groove (132). The method of claim 1,
The pin 114, the bearing bush 116 is coupled to the outer periphery, characterized in that the sliding slidingly coupled to the guide long groove 132 of the insulating operating rod 130 via the bearing bush 116. Gas insulated switchgear having a disconnecting device with improved operation performance.

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