JPH03667Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a disconnector with a grounding device used as one of power plants or substation equipment.

Prior Art A disconnect switch, which is one of the facilities of a power plant or a substation, generally has both a current-carrying part and a mechanical part exposed outdoors, and the same applies to the grounding device attached to the disconnect switch. Therefore, exposed current-carrying parts and mechanical parts are susceptible to external environmental conditions such as snow accumulation, freezing, or dust adhesion, which can increase the friction of the sliding contact parts and bearing parts, leading to malfunction of the disconnector and grounding device. There are many. The current-carrying part of the disconnector has a structure in which the movable electrode enters the clip-shaped fixed electrode when closing the circuit, and then the movable electrode twists and contacts the fixed electrode. As the force is reduced, operational problems are relatively eliminated, and even if malfunction occurs, there is almost no chance of injury or death. However, the purpose of the grounding device is to ground the charging current of the line, the substation bus, and equipment, or the current induced from other circuits, so that inspection of the line, substation bus, and equipment can be carried out safely. If inspection work is carried out on railway lines, station busbars, or equipment when it is uncertain whether the grounding device will be turned on, there is a risk of personal injury.

On the other hand, in the conventional disconnector with a grounding device, as shown in FIG. Since the movable grounding electrode 15 corresponding to the contactor 11 was fixed to the grounding opening/closing operation shaft 13 via the mounting piece 14, the energizing part of the grounding device was located between each phase of the disconnector, and Therefore, the dimension of the disconnector in the phase-to-phase direction must be increased, resulting in a disadvantage that the installation area of the disconnector becomes large.

Purpose of the invention The present invention was made in order to eliminate the above-mentioned conventional defects, and its purpose is to prevent malfunction of the grounding device due to environmental conditions such as snow accumulation, freezing, or dust adhesion, thereby preventing personal accidents. Equipped with a grounding device that can reduce the space between the phases, reduce the installation area, reduce the space required in the vertical direction, reduce the number of parts, and improve operational reliability. The purpose is to provide a disconnector.

Structure of the invention In order to achieve the above-mentioned object, the present invention attaches a mechanism case containing a pinion for opening/closing the earthing device to one end of the base of the disconnect switch, and attaches the disconnect switch to both upper and lower surfaces of the mechanism case. A support insulator tube that supports a fixed electrode and houses a grounding fixed electrode of a grounding device, and a protective case capable of accommodating a movable grounding electrode are connected and fixed vertically on substantially the same axis, and the mechanism case, the support insulator tube and A ground movable electrode that can slide back and forth via a bearing provided in the mechanism case is housed in the sealed space formed by the protective case, and a rack that engages with the pinion is carved into the ground movable electrode. This configuration is adopted.

Embodiment Hereinafter, an embodiment embodying the present invention will be explained with reference to FIGS. 2 and 3. A groove-shaped base 2 is provided at the upper end of a pair of front and rear frames 1 which are erected and fixed on a foundation. A supporting insulator 3 is erected and fixed on the upper surface of one end of the base 2, and a clip-shaped contact 5 as a fixed electrode of a disconnector is supported at the upper end of the support insulator 3. Similarly, a mechanism case 16 is fixed to one end of the base 2, a support insulator tube 17 is erected and fixed on the upper surface of the case 16, and a cover plate 18 is placed over the upper end opening of the support insulator tube 17. There is. A clip-shaped contactor 6 serving as a fixed electrode of the disconnector is supported on the upper surface of the cover plate 18. An operating lever 7 is rotatably supported on the upper surface of the center portion of the base 2, and a support insulator 8 is erected on the upper surface of the lever 7, and the contactor 5 is mounted on the upper end of the support insulator 8. ，
A movable electrode 9 corresponding to the movable electrode 6 is supported horizontally so as to be movable toward and away from the movable electrode 6 .

A tulip-shaped ground contact 19 serving as a fixed ground electrode is fixed downwardly to the lower surface of the cover plate 18. Bearings 20 and 21 are provided at two upper and lower locations inside the mechanism case 16, and a rod-shaped ground movable electrode 22 is provided for both bearings 20 and 21.
is slidable in the vertical direction and the contactor 19
It is supported so that it can be moved toward and away from the Further, a tulip-shaped ground contact 23 is attached to the upper surface of the mechanism case 16 as a ground movable electrode that is in constant contact with the ground movable electrode 22. moreover,
An operating shaft 24 for grounding/closing common to each phase is rotatably supported in the mechanism case 16.
On the top is a rack 2 carved into the ground movable electrode 22.
A pinion 26 meshing with the ground movable electrode 22 is fitted therein, and the reciprocating rotation of the pinion 26 moves the ground movable electrode 22 in the vertical direction. Similarly, a protective case 27 for accommodating and protecting the ground movable electrode 22 in an open state is suspended and fixed on the bottom surface of the mechanism case 16.

By the way, in this embodiment, as shown in FIG. 2, the support insulators 3 and 8 and the support insulator tube 17 are arranged almost on the same straight line, and the support function of the contactor 6 as a fixed electrode on the disconnector side with respect to the support insulator 17 is provided. is granted. Further, the mechanism case 16, the support insulator tube 17, and the protective case 27 are connected and fixed vertically on substantially the same axis, and the contacts 19, 23 of the earthing device are placed in the sealed space formed by these three members.
The ground movable electrode 22 and a pinion 26 for operating the movable electrode 22 are housed therein.

Furthermore, in this embodiment, a plurality of disconnectors with earthing devices configured as shown in FIG. The phases are operated simultaneously in the opening and closing directions.

Next, the operation of the disconnector with a grounding device configured as described above will be explained.

FIGS. 2 and 3 show the open circuit state of the grounding device in which both ends of the movable electrode 9 are inserted into contact with the contacts 5 and 6, respectively, and the disconnector is closed, while the ground movable electrode 22 is separated from the contact 19. It shows. In this state, when the operating lever 7 is rotated in the direction of the arrow in FIG. 2 by a disconnector opening/closing mechanism (not shown), the movable electrode 9 is separated from both contacts 5 and 6, and the disconnector is opened. Next, the operating mechanism of the grounding device (not shown)
When the operating shaft 24 is rotated in the counterclockwise direction in FIG. be done. In this way, the charging current is transferred to the power transmission line (not shown),
It is grounded to the earth via the contactor 6, the cover plate 18, the contactor 19, the ground movable electrode 22, the contactor 23, the mechanism case 16, the base 2, and the pedestal 1.

Now, in the embodiment of the present invention, the mechanism case 16 of the grounding device is fixed to one end of the base 2 of the disconnector, and the upper and lower surfaces of the mechanism case 16 also have the function of supporting the contactor 6 of the disconnector. The support insulator tube 17 and the protective case 27 that accommodates the ground movable electrode 22 are installed so as to be located approximately on the same line, and the mechanism case 16 and the support insulator tube 17 are
Since the grounding device is constructed by accommodating the grounding contacts 19, 23, the grounding movable electrode 22, the pinion 26, etc. in the sealed space formed by the protective case 27, the contacts 19 may be damaged due to snow accumulation, freezing, or dust adhesion. , 23 and the ground movable electrode 22 and the wear of the bearings 20, 21 and the ground movable electrode 22, as well as preventing evaporation of the lubricating oil supplied to the mechanism, leakage due to wind and rain, and corrosion. Oxidation and corrosion of the current-carrying contact surface due to gas is prevented, the reliability of the grounding switching operation is significantly improved, and personal accidents caused by malfunction of the grounding device can be prevented.

In addition, in the embodiment of the present invention, the support insulators 3 and 8 and the support insulator tube 17 are arranged almost on the same straight line, and the support insulator 17, the mechanism case 16, and the protection case 2
7 are connected and fixed vertically on substantially the same axis,
and a support insulator tube 1 in which ground contacts 19 and 23 are installed.
7 also has the function of supporting the contactor 6 of the disconnector, so the contactor or movable electrode of the earthing device is located between each phase of the disconnector and protrudes in the direction between the poles of the conventional disconnector with a grounding device. Compared to this, the interphase dimension and the interpole dimension can be made smaller to make the disconnector more compact and the installation area can be reduced. Furthermore, the aesthetic appearance of the disconnector can also be improved.

Moreover, in the embodiment of the present invention, since the ground movable electrode 22 is provided with a rack 25 that engages with the pinion 26, the space in the vertical direction can be made smaller than when a separate rack member is connected to the movable electrode. At the same time, the number of parts can be reduced, and since the rack has an integral structure rather than a joint structure, operational reliability can be improved.

Effects of the invention As detailed above, the present invention houses the fixed earthing electrode, movable earthing electrode, and pinion for earthing opening/closing operation that constitute the earthing device in the sealed space formed by the mechanism case, the support insulator tube, and the protective case. Therefore, it is possible to prevent friction, oxidation, or corrosion of current-carrying contact surfaces due to environmental conditions such as snow accumulation, freezing, or dust adhesion, thereby improving the reliability of grounding switching operations and preventing personal accidents. A mechanism case containing a pinion for opening and closing the earthing device is attached to one end of the base, and a fixed electrode of the disconnector is supported on both upper and lower surfaces of the mechanism case, and a support containing the earthing fixed electrode of the earthing device is attached to one end of the base. Since the insulator tube and the protective case that can accommodate the ground movable electrode are connected and fixed vertically on almost the same axis,
The installation area can be reduced by reducing the phase-to-phase and pole-to-pole dimensions, and the aesthetics can be further improved.Also, since the ground movable electrode is engraved with a rack that engages with the pinion, the movable electrode The space required in the vertical direction can be smaller than when separate rack members are combined, the number of parts can be reduced, and the rack has an integrated structure rather than a joint structure, improving operational reliability. It has excellent effects.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional disconnector with a grounding device, with the disconnector closed and the grounding device open, and Fig. 2 is a perspective view of the disconnector with a grounding device of the present invention, with the disconnector closed and the grounding device open. , FIG. 3 is an enlarged sectional view of the grounding device. 2... Base, 6... Contactor as a fixed electrode of a disconnector, 16... Mechanism case, 17... Support insulator tube, 19, 23... Earthing contactor as a grounding movable electrode of a grounding device, 20, 21 ...Bearing, 22...
Ground movable electrode, 24... operating shaft, 25... rack, 26... pinion, 27... protective case.

Claims (1)

[Scope of Claim for Utility Model Registration] A mechanism case 16 containing a pinion 26 for opening/closing the earthing device is attached to one end of the base 2 of the disconnect switch, and A support insulator tube 17 that supports the fixed electrode 6 and houses the grounded fixed electrodes 19 and 23 of the grounding device, and a protective case 27 that can accommodate the grounded movable electrode 22 are connected and fixed vertically on substantially the same axis, and Bearings 20 and 21 provided in the mechanism case 16 are contained in the sealed space formed by the mechanism case 16, the support insulator tube 17, and the protective case 27.
A disconnector with a grounding device, characterized in that a movable grounding electrode 22 which can be slid back and forth through the grounding movable electrode 22 is housed therein, and a rack 25 that engages with the pinion 26 is carved into the movable grounding electrode 22.