JPH02266809A - Compressed-gase-insulated grounded switch - Google Patents

Abstract

PURPOSE:To reduce the jointing section as much as possible and to improve the reliability of a switch by providing a moving rod in a moving side contact section into a hollow section of a conductor in a charging section and by switchingly operating the moving rod in the combination of an insulating operation bar, a pinion and a rack. CONSTITUTION:When a connecting rod 10 is rotatingly driven by an unillustrated operation device, this rotating driving force is axially converted by a gear box 7 to drive a shaft 8 in rotation. Since an insulating operation bar 6 jointed to this shaft 8 is engaged with a rack 4 provided to a moving rod 1 through a pinion 5, the moving rod 1 moves in the direction of a right angle with the insulating operation bar 6 and comes into contact with a fixed side contact section 11 to cause a closed state. If the rotating direction of a driving shaft is driven opposite to the closing movement, an opening movement will be performed. The reliability of an equipment on a movement characteristic can remarkably be improved as the jointing section to transmit the driving force is sharply reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a gas-insulated grounding switch used in a reduced-sized gas-insulated resealable bag (referred to as GIS).

(Prior art) In recent years, there has been a tendency for compact gas-insulated switchgears to be used frequently, and they are being applied not only outdoors, but also in indoor substations located in the basements of high-rise buildings in urban centers. It has become. In such GIS, it is required to further downsize the equipment not only from the viewpoint of equipment reliability but also from the viewpoint of land cost, etc., and comprehensive rationalization including not only GIS but also the entire building is required. , downsizing is desired.

(Problems to be Solved by the Invention) The structure of a conventional reduced-sized gas-insulated grounding switch will be explained with reference to FIG. That is, in the conventional grounding switch, a movable rod ω whose one end is at ground potential and an opening/closing mechanism (2) for driving the movable rod (2) are provided in a part of a grounded metal case (2). For this reason, the opening/closing mechanism section largely protrudes from the metal case (2) constituting the main current-carrying section, and the overall structure of the device requires a correspondingly large installation space.

The purpose of the present invention is to reduce the number of connecting parts as much as possible to improve the reliability of the switch, and to significantly reduce the size of the opening/closing mechanism and external mechanism, thereby contributing to the downsizing of the entire GIS and improving safety. An object of the present invention is to provide a gas insulated switch with improved performance.

[Structure of the invention]

(Means for Solving the Problems) The gas insulated grounding switch of the present invention has a fixed side contact part and a movable rod that connects and separates from the fixed side contact part in a metal case in which a live part conductor is arranged. In a gas insulated grounding switch disposed facing the contact part, the movable rod is formed into a hollow shape and a rack is provided in the hollow part so that the movable rod can be slid into the hollow part of the live part conductor. The present invention is characterized in that the opening/closing operation force is transmitted from an operating device provided outside the metal case to a pinion meshing with the rack inside the movable rod via an insulated operating rod.

(Function) In the present invention, the movable rod of the movable side contact part is provided in the hollow part of the live part conductor, and the movable rod is opened and closed by a combination of an insulated operating rod, a pinion, and a rack. The conventional opening/closing mechanism can be omitted, and the movable contact portion and the mechanism for transmitting the opening/closing operation force can be reduced in size.

(Embodiment) An embodiment of the reduced-sized gas insulated grounding switch according to the present invention as described above will be specifically described with reference to the drawings. In FIG. 1, a rack (A) is built into the movable rod (2), and a pinion (2) is provided to mesh with this rack (A). This pinion ■ consists of a movable rod ■, an insulated operating rod 0 disposed between a metal case ■, and a shaft (c) connected to a gear box ■, and the shaft (c) maintains gas-tightness. It is led out to the outside of the metal case through the bearing 0.

In the metal case (2), a gear box (2) for changing the axial direction connects the shaft (to) and a connecting rod (10) provided perpendicularly thereto. Connecting rod (1
The other end of movable rod (0) is connected to an operating device (not shown), and this operating device opens and closes the movable rod (2).

The gas insulated grounding switch of the present invention configured as described above operates as follows.6 The connecting rod (
When 10) is rotationally driven, this rotational driving force is converted in the axial direction by the gear box (■) to rotationally drive the shaft (C),
The insulated operating rod 0 connected to this shaft (c) meshes with the rack (a) provided on the movable rod 1 via the pinion ■, so the movable rod (υ is the insulated operating rod 6, and comes into contact with the fixed side contact portion (11) to be in a closed circuit state.

Moreover, FIG. 2 is a diagram showing a state after the circuit is operated from the open state shown in FIG. 1 to the closed state. In this state, if the rotational direction of the drive shaft is driven in the direction opposite to the direction of the circuit closing operation, the circuit opening operation is performed, and the circuit opening state shown in FIG. 1 can be achieved.

According to this embodiment, as described above, it is possible to store the movable rod (2) in the live part conductor (12) in the open state, and the movable rod (2) can be opened and closed by rotating the insulated operating rod 6. By being able to perform this, rotational drive can be converted into linear drive to perform opening and closing operations, and the conventional opening and closing mechanism can be omitted. Therefore,
In the insulating gas, the connecting parts are the rack (A) and the pinion ■, and the insulated operating rod 0 and the gear box ■, and compared to the conventional switch shown in Fig. 4, the number of connecting parts for transmitting driving force is drastically reduced. As a result, the reliability of the device's operating characteristics can be greatly improved.

In addition, the opening/closing mechanism shown in Fig. 4, which accounted for about 30% of conventional equipment, has been omitted, and only the gear box for changing the direction of the rotational drive shaft can be used.
Can be reduced by 0%. Furthermore, since the connecting rod (10) for transmitting external driving force only rotates, it does not require a large operating space unlike conventional connecting parts.

Therefore, the installation space for equipment can be reduced, and together with the drastic reduction in the number of connecting parts, this can greatly contribute to the downsizing of the entire GIS. Its contribution is especially great for GIS installed in underground substations. It can also contribute to ensuring safety for maintenance and inspection workers.

Note that the present invention is not limited to the above embodiments, but
For example, as shown in Fig. 3, by shifting the insulated operating rod 6 by the L dimension with respect to the axis of the metal case (2).

It is possible to reduce the size of the live part conductor (12). Furthermore, other configurations are also possible.

〔Effect of the invention〕

As explained above, according to the present invention, the conventional opening/closing mechanism can be omitted by housing the movable rod on the conductor side of the live part and opening/closing the movable rod by rotational drive. ＋
It is possible to provide a reduced-sized gas insulated switch that contributes to downsizing of the entire GIS and also improves safety.

[Brief explanation of drawings]

1 and 2 are cross-sectional views showing open and closed states of the gas-insulated grounding switch of the present invention, FIG. 3 is a cross-sectional view showing another embodiment of the present invention, and FIG. 4 is a conventional grounding switch. It is a sectional view showing a switch. 1... Movable rod 3... Metal case 5... Pinion 7... Gear box 9... Bearing 11... Fixed contact part 13... Movable contact part 2... Opening/closing mechanism 4. ... Rack 6 ... Insulated operating rod 8 ... Shaft 10 ... Connecting rod 12 ... Conductor agent Patent attorney Norihiko Ken Yudo Ken Daishimaru

Claims (1)

[Claims] A gas insulated grounding switch in which a fixed side contact part and a movable side contact part having a movable rod that comes into contact with and separates from the fixed side contact part are arranged facing each other in a metal case in which a live part conductor is arranged. is formed into a hollow shape, a rack is provided in this hollow part, this movable rod is provided so as to be able to slide in the hollow part of the live part conductor, and a pinion that meshes with the rack in this movable rod is provided with a rack outside the metal case. 1. A gas-insulated grounding switch characterized in that the switching operation force is transmitted from an operating device provided in the switch via an insulated operating rod.