JPH03108221A - Gas-insulated switch - Google Patents

Abstract

PURPOSE:To sharply reduce connection sections, improve the reliability of a switch, and shrink the whole device by concurrently opening or closing the moving rod of a breaker and the moving rod of a grounded switch with the rotary motion of an insulating operation bar. CONSTITUTION:When a connecting rod 12 is rotated, its rotary driving force is converted into the axial direction by a gear box 11 to rotate a shaft 9. A pinion 25 and a screw 22 are rotatively driven via an insulating operation bar 8 integrated or connected to the shaft 9. When the moving rod 7 of a disconnector 1 is operated to the opened side in conjunction with the pinion 25 and a rack 24, a moving rod 17' is operated to the closed side by the screw 22 and a male gear 23. A disconnector 1 is opened, and a grounded switch 2 is closed. When the rotating direction of a drive shaft is reversed under this condition, the disconnector 1 is closed and the grounded switch 2 can be opened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a gas insulated switch having a built-in disconnector function and a grounding switch function.

(Prior Art) In recent years, closed-type gas-insulated switchgears have been increasingly used, not only outdoors but also in urban centers.

It is increasingly being applied to indoor substations located underground in high-rise buildings. In such closed type gas insulated switchgear, it is required to further downsize the equipment not only from the viewpoint of reliability of the equipment but also from the point of view of land cost, etc. , comprehensive rationalization and downsizing including the entire building is desired.

FIG. 4 shows the structure of a switch applied to such a closed type gas insulated switchgear. In the figure, a disconnector 1 and a grounding switch 2 are arranged in the same metal case. Disconnector 1
The fixed contact portion 3 of the disconnector, the movable contact portion 4 of the disconnector, and the fixed contact portion 5 of the earthing switch 2 are supported by insulating spacers 6, respectively. The movable rod that opens and closes the re-contact part is
The disconnect switch 1 and the earthing switch 2 are individually provided, and when driven, the disconnecting switch 1 and the earthing switch 2 each require a driving force.

The disconnector 1 is provided with a movable rod 7 for opening and closing the re-contact parts 3 and 4, and an insulated operating rod 8 for operating this, and the insulated operating rod 8 is led out of the tank 10 through a shaft 9 that maintains gas tightness. has been done. A gear box 11 for changing the axial direction is attached to the outside of the tank 10, and connects the shaft 9 with a connecting rod 12 provided perpendicularly thereto. The other end of the connecting rod 12 is connected to an operating device (not shown), and the movable rod 7 is opened and closed by this operating device.

The grounding switch 2 has a fixed side contact part 5 provided on a conductor supported by an insulating spacer 6, and the grounding switch is located at an opposing position. It was possible to close the earthing switch 2 after the circuit was opened. The earthing switch 2 is connected to the main shaft 14 by an externally provided operating device. An insulated movable rod 17 is operated via a lever 15 and a link 16 to perform circuit closing/opening operations.

(Problems to be Solved by the Invention) However, the conventional gas insulated switch as described above has the following problems. That is, in the switch shown in FIG. 4, the disconnect switch 1 and the ground switch 2 are connected to
Since it occupies 30%, it becomes an obstacle to the overall reduction value of GIS. Furthermore, although the disconnector 1 is extremely downsized, the earthing switch 2 protrudes to the outside. In addition, since disconnectors and earthing switches must be operated individually, a drive device is required for each, and the number of parts and connections increases, which increases the number of points to consider, improving reliability. is difficult.

The purpose of the present invention is to improve the reliability of the switch by reducing the number of connecting parts as much as possible, and to significantly reduce the size of the protruding parts, thereby contributing to the downsizing of the entire GIS and improving safety. It is an object of the present invention to provide a gas insulated switchgear.

[Structure of the invention]

(Means for Solving the Problems) A gas insulated switch of the present invention is a gas insulated switch in which a disconnecting switch side contact part and a grounding switch side contact part are arranged orthogonally to each other in a metal case. The disconnector-side contact portion is arranged along the longitudinal direction within the metal case, and a rack is provided within the movable rod, and the earthing switch-side contact portion is arranged perpendicularly to the disconnector-side contact portion. A male thread is carved in the movable rod, a pinion is provided midway through the insulated operating rod that is operated from outside the metal case and engages with the rack of the disconnector movable rod, and the tip of the insulated operating rod is provided with a pinion that engages with the rack of the disconnector movable rod. A screw thread is provided that engages with the male thread in the movable rod of the earthing switch, and when the insulated operating rod is operated to open or close the movable rod on the disconnector side, the movable rod of the earthing switch is provided with It is characterized by being configured to provide a closing action or an opening action.

(Function) In the present invention, by operating the insulated operating rod from outside the metal case, the disconnector movable rod and the pinion engage to operate in the opening direction, and the earthing switch movable rod has a male thread and a screw thread. It operates in the direction of opening by meshing with.

Further, even when the disconnector is in a closing operation, by operating the insulating operation rod, the disconnector movable rod is moved in the opening direction, and the earthing switch movable rod is moved in the opening direction.

(Embodiment) The gas insulated switch according to the present invention as described above will be specifically described with reference to an embodiment shown in FIGS. 1, 2, and 3. In FIGS. 1, 2, and 3, the same parts as those in the conventional example shown in FIG. 4 are designated by the same reference numerals and will be explained.

In FIG. 1, a track 24 is fixed inside the disconnector movable rod 1 and meshes with a pinion 25. This pinion 25 is attached to the middle of the insulated operating rod 8. A screw thread 22 is provided at the tip of the insulated operating rod 8, and meshes with a male gear 23 provided inside the movable rod 17' of the earthing switch 2. The movable rod 17' is in contact with the contact portion 26, and the fixed contact portion 27 of the earthing switch 2 is provided at an opposing position.

The insulated operating rod 8 is integrated with or connected to a shaft 9 that is connected to an external mechanism, and the shaft 9 maintains gas tightness. Axis 9
A gear box 1 for performing axial direction conversion is connected to the outside of the metal case 10, which is led out through the metal case 10.
1 is attached, and the other end of the connecting rod 12 is connected to an operating device (not shown), and the movable rod 7 and the movable rod 17' are connected to the shaft 9 and a connecting rod 12 provided perpendicularly thereto. The opening and closing operations are performed.

The outer surface of the movable rod 17' is provided with two grooves 20 in the axial direction, as shown in FIG. It is fixedly provided at three locations on the inner surface of the part. Due to the engagement structure between the groove 20 and the stop pin 21, when the male gear 23 rotates during the opening/closing operation, the movable rod 17' is rotated by the frictional force or reaction force generated between the male gear 23 and the screw thread 22. It is designed to move in a straight line.

With the above configuration, this embodiment operates as follows. In FIG. 1, when the connecting rod 12 is rotationally driven by an operating device (not shown), this rotational driving force is converted in the axial direction by the gear box 11 to rotationally drive the shaft 9. Therefore, the pinion 25 and the screw screw 22 are rotationally driven via the insulated operating rod 8 which is integrated with or connected to the shaft 9. Then, when the disconnector movable rod 7 moves to the open side due to the relationship between the pinion 25 and the rack 24, the movable rod 17' moves to the close side by the screw screw 22 and the male gear 23. Then, as shown in FIG. 2, the disconnector 1 becomes open and the earthing switch 2 becomes closed.

In the state shown in FIG. 2, if the direction of rotation of the drive shaft is reversed so that the disconnector 1 closes the circuit and the movable rod 17' of the earthing switch 2 operates in the opposite direction, the disconnector opens and the movable rod 17' closes. The disconnector shown in FIG. 1 can be closed and the earthing switch can be opened.

According to this embodiment, 1 of the insulated operating rod 8 as described above.
By rotating the book, the movable rod 7 of the disconnector and the movable rod 17' of the earthing switch 2 can be simultaneously opened and closed, thereby eliminating the conventional opening/closing mechanism of the earthing switch 2.

Therefore, the connecting parts in the insulating gas are the movable rod 7 of the disconnector, the rack 24 and the pinion 25, and the movable rod 17.
Since only the screw thread 22 and the male gear 23 mesh with each other, the number of connecting parts for transmitting driving force is drastically reduced compared to the conventional switch shown in Fig. 4, which improves the reliability of the operating characteristics of the device. can significantly improve performance.

Furthermore, the ejection part, which occupied 20% to 30% of conventional equipment, is omitted. Furthermore, there is one connecting rod for external driving force transmission.
In addition to the drastic reduction in the number of connections, the entire GIS can be reduced in size, and in terms of device performance, no DC voltage remains on the busbar, resulting in stable quality. It can greatly contribute to the downsizing of sealed gas insulated switchgear as a whole, and its contribution is especially great for sealed gas insulated switchgears installed in underground substations.

It can also contribute to safety for maintenance and inspection workers.

〔Effect of the invention〕

As explained above, according to the present invention, the movable rod of the disconnector and the movable rod of the earthing switch are simultaneously opened and closed by the rotational movement of the insulated operating rod, so that the earthing switch opening/closing mechanism can be omitted. The gas-insulated switchgear has improved the reliability of the switch by drastically reducing the amount of noise, and has also significantly reduced the size of the equipment, contributing to the reduction in the size of the entire closed type gas-insulated switchgear and improving safety. can be provided.

[Brief explanation of drawings]

FIGS. 1 and 2 are disconnection planes showing the disconnector open state and the disconnector open state of the gas insulated switch of the present invention, and FIG. 3 is a cross section showing an enlarged movable rod portion of the earthing switch of the present invention. figure,
FIG. 4 is a sectional view showing a conventional gas insulated switch, and FIG. 5 is a connection diagram showing the connection relationship of a circuit breaker, a disconnector, and a grounding switch. 1... Disconnector 2... Earthing switch 3.
...Fixed contact part 4...Movable contact part 5...
Fixed side contact part 6... Insulating spacer 7... Movable rod 9... Shaft 11... Gear box 13... Breaker 15... Lever 17... Movable rod 20... Groove 22 ... Screw screw 24 ... Rack 26.27 ... Contact part 8 ... Insulated operation rod 10 ... Metal case 12 ... Connecting rod 14 ... Shaft 16 ... Link 17'. ...Movable rod 21...Pin 23...Male gear 25...Pinion (8733) Agent: Yoshiaki Inomata, patent attorney (and one other person)

Claims (1)

[Claims] In a gas insulated switch in which a disconnector-side contact part and a grounding switch-side contact part are arranged orthogonally to each other in a metal case, the disconnector-side contact part is arranged along a longitudinal direction inside the metal case. A hook is provided in the movable rod, and the contact portion on the earthing switch side is arranged perpendicular to the contact portion on the disconnector side. A pinion that engages with the rack in the movable rod of the disconnector is provided in the middle of the insulated operating rod to be operated, a screw thread that engages with the male thread in the movable rod of the earthing switch is provided at the tip of the insulated operating rod, and A gas insulated switch characterized in that when the insulated operating rod is operated to cause an opening or closing action to be applied to the disconnector side movable rod, a closing or opening action is applied to the movable rod of the earthing switch.