JPS6039721A - Disconnecting switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a disconnector used in a transmission/substation system.

Conventional technology Recently, as power equipment has increased in capacity, remote control and automation through unmanned substations has progressed rapidly from the perspective of labor saving in the operation and operation of substation equipment, and equipment management has become increasingly reliable. is required.

On the other hand, measures are being taken to improve the reliability and safety of substations, and efforts are being made to extend inspection cycles and eliminate non-inspections.

Under such circumstances, conventional new circuit devices had exposed energized parts and operating mechanisms, so when installed outdoors, the operating mechanism 9 lubricating oil volatilized and leaked due to wind and rain, and in industrial areas, corrosive gas The contact parts may become oxidized due to
The adhesion of dust increases the friction on the sliding surfaces of the contact parts and the operating mechanism parts, and there is a possibility that smooth operation will not be possible. In addition, in cold regions, snow may accumulate on energized parts and operating mechanism parts due to snowfall.

Operational malfunctions occur more frequently due to freezing, etc., and as reliability is lacking, it is necessary to reliably carry out 9-9 safety inspections at short intervals.

On the other hand, since circuit breakers have a structure in which both the interrupting part and the operating part are housed within an insulator, the insulation phase dimension can be reduced, whereas conventional disconnectors are of the horizontal two-point type and the opening/closing single-point type. As the current-carrying part rotates, the insulation phase dimension becomes larger than that of the circuit breaker, and the equipment configuration of the substation.

Due to the layout of the disconnect switch, equipment installation had the disadvantage of being inefficient in area.

Purpose of the Invention The present invention has been made in view of the drawbacks of the prior art, and it is an object of the present invention to provide a disconnector that can be installed in a smaller area and has excellent weather resistance that is not affected by environmental conditions. With the goal.

Structure of the Invention The disconnector of the present invention includes a first fixed electrode provided at the tip of a support insulator, a second fixed electrode provided at the tip of a support insulator spaced apart parallel to the support insulator, and A movable electrode forming an electric path is mounted so as to be slidable in the direction of the electric path so as to be able to move toward and away from the second fixed electrode, and the movable electrode is installed between the tip of the support insulator and the tip of the support insulator tube. A protective insulator for the movable electrode is installed, and a protective cover for accommodating the movable electrode when disconnected is provided on the side of the support insulator tube opposite to the protective insulator for the movable electrode, and the movable electrode is sealed.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to FIGS. An operation box 2 is fixed to the outer intermediate portion of the pedestal 1b. Same operation box 2
When the handle 3 on the side is rotated, the output shaft 4 protruding from the top surface is rotated.

A gear box 6 is formed at one end of a rectangular cylindrical base box 5 installed between the upper ends of both frames 1a and 1b, and a support insulator 7 and a support insulator tube 8 are erected parallel to each other on the upper surface of both ends of the base box 5, respectively. are doing.

A protective insulator tube 10 for the movable electrode is hermetically installed between an electrode fitting 9a fixed to the upper end of the support insulator 7 and a cubic electrode fitting 9b fixed to the upper end of the support insulator tube 8, which also serves as a gear box. There is.

Further, on the opposite side of the movable electrode protective insulator tube 10 of the electrode fitting 9b, a cylindrical upper protective cover 11 with a lid for accommodating the movable electrode 17 when the circuit is open is fixed to maintain airtightness.

Interphase protective cover 12 between the gear boxes 6 in each phase
a, 12b'' are provided.

Next, the disconnecting device and its operation mechanism will be explained.
1 has a cylindrical guide portion 13b facing inward.
is formed, and a tulip-shaped contact 14 is provided on the rim side, and a cylindrical guide portion 13a is also formed on the surface corresponding to the protective insulator tube 10 for the movable electrode facing inward. ing. A wire connection terminal 15 is provided on the upper surface of the electrode fitting 9b. In addition, the electrode fitting 9
b and the contactor 14 constitute the first fixed electrode P1.

A movable electrode 17 in the shape of a round bar with a rack 16 carved on one side is guided by the guide portions 13a and 13b and comes into contact with the contactor 14 so as to be energized.

A tulip-shaped contact 18 is provided via a support fitting 19 so as to be able to come into contact with and separate from the front end of the electrodynamic 1ii17. In addition, the light emitting part 20a and the light receiving part 20b of the optical fiber are placed on the end surface of the support fitting 19 so as to sandwich the front end of the movable electrode 17.
is provided to constitute a circuit open detection section. Reference numeral 21 is a lid of the electrode fitting, and reference numerals 2 and 2 are connection terminals for electric wires. Note that the electrode fitting 9a and the contact 18 constitute a second fixed electrode P2.

The movable electrode 1 is located inside the tip of the upper protective cover 11.
A light emitting part 24a and a light receiving part 24b of the optical fiber are provided by supporting metal fittings 23 so as to sandwich the rear end thereof when the wire 7 is disconnected and retreated, thereby forming an open circuit detection part.

As shown in FIG. 1, an operating shaft 26, which is rotated from the output shaft 4 via a connecting rod 25 forming a universal joint, is introduced into the interior from the lower surface of the gear box 6, and has a first end at its tip. A first drive gear 27 is attached.

The lower part of the interlocking shaft 30 made of an insulating material is supported by bearings 28 and 29 in the electrode fitting 9b and the gear box 6 so as to pass through the support insulator tube 8. A driven gear 31 is attached, and a second drive gear 32 that meshes with the rack 16 of the movable electrode 17 is attached to the upper end. Therefore, when the handle 3 of the operation box 2 is rotated, the output shaft 4. Connecting rod 25. Operation axis 26. First driving and driven gears 27.
31, the interlocking shaft 30 is rotated, and the second drive gear 32
Then, the rack 16 is driven and the movable electrode 17 is moved back and forth.

A driving bevel gear 33 attached to the lower end of the interlocking shaft 30 meshes with a driven bevel gear 34 at the base end of the interphase interlocking shaft 35 mounted within the interphase protection cover 12 . Therefore, when the driven bevel gear 34 is rotated, the interlocking shaft 35a,
The Y-phase and Z-phase interlocking shafts are rotated through the switch 35b, so that the opening and closing operations are performed in synchronization with each phase.Next, the operation of the disconnector having the above structure will be explained.

FIG. 3 shows a closed circuit state, in which the movable electrode 17 is inserted into the contactor 18, the light emitting part 20a and the light receiving part 20b of the optical fiber are shielded from light, and the closed circuit state is displayed at an appropriate position.

Now, when the handle 3 is operated to rotate the second drive gear 32 from the interlocking shaft 30 and move the movable electrode 17 away from the contactor 18 and into the upper protective cover 11 using the rack 16, the optical fiber The rear end of the movable electrode 17 blocks the space between the light emitting part 24a and the light receiving part 24b, indicating an open circuit. At this time, the light emitting section 20a.

There is no obstruction between the light receiving parts 2Ob, and the closed circuit display is canceled.

Next, in order to open the new path, the handle 3 is rotated in the opposite direction to the above to cause the movable electrode 17 to close the path.

At this time, when the movable electrode 17 is inserted into the contactor 18, the light emitting part 20a of the optical fiber.

The front end of the movable electrode 17 interrupts the space between the light receiving parts 2Ob to indicate an open circuit. Further, there is no obstruction between the light emitting section 24a and the light receiving section 24b, and the open circuit display is eliminated.

In this way, in this embodiment, the movable electrode 17 is arranged so as to be slidable toward one electrode fitting 9a, so the area that the movable electrode 17 blocks during operation is reduced because it is a straight line, and it can be stored in a closed space. becomes easier.

Furthermore, if the movable electrode 17 is hermetically housed in the movable electrode protective insulator tube 10° upper protective cover 11, weather resistance will be improved. In other words, since the movable electrode 17 and other operating mechanisms are not exposed to the outside, when installed outdoors, they are not exposed to wind and rain, and lubricant oil does not volatilize or leak.In industrial areas, corrosive gas It is not exposed to water and the contact parts do not oxidize. Further, the friction on the sliding surfaces of the contact parts and the operating mechanism part does not increase due to the adhesion of dirt and dust, and smooth operation can be maintained for a long period of time. In addition, in cold regions, it is possible to prevent snow from accumulating on the current-carrying parts and operating mechanism parts due to snowfall, and it is also possible to reduce the frequency of occurrence of malfunctions such as freezing, thereby increasing reliability.

Furthermore, since the movable electrode 17 is moved by the meshing of the gear 32 and the rack 16 formed on the movable electrode 17, linear motion can be reliably and efficiently performed within a small plane.

Further, in this embodiment, the display of the opening/closing circuit is photoelectric and can be detected in two positions, open and closed, so that the display is reliable and it is possible to confirm whether the circuit is fully closed or completely open.

Effects of the Invention As detailed above, the present invention provides a first fixed electrode at the tip of a support insulator, a second fixed electrode at the tip of a support insulator spaced parallel to the support insulator, and A movable electrode that forms an electric path with respect to the first fixed electrode is attached so as to be slidable in the direction of the electric path, and corresponds to the second fixed electrode so as to be able to come into contact with and separate from it, and between the tip of the support insulator and the tip of the support insulator tube. A protective insulator for the movable electrode containing the movable electrode therein is installed, and a protective cover for housing the movable electrode in the event of disconnection is provided on the opposite side of the support insulator tube to seal the movable electrode. The energized parts and operating mechanism of the device are not exposed and when installed outdoors, they are not exposed to wind and rain, which prevents lubricating oil from volatilizing and flowing out.
In addition, since the contact parts are not exposed to corrosive gas in industrial areas, there is no oxidation of the contact parts, and the friction of the contact parts and sliding surfaces of the operating mechanism parts does not increase due to adhesion of dust. It can maintain smooth operation for a long period of time, and in cold regions, parts that are energized by snowfall.

It is possible to prevent snow from accumulating on the operating mechanism, improve reliability without causing operational malfunctions due to freezing, etc., and thereby eliminate the need for maintenance inspections at short intervals. The installation of the container does not take up a large area and has an excellent effect, making it an excellent invention for industrial use.

[Brief explanation of the drawing]

FIG. 1 is a front view of a disconnector embodying the present invention, FIG. 2 is a side view, and FIG. 3 is a sectional view of the main parts. 1a, lb... mount, 2... operation box, 5...
・Base box, 7... Support insulator, 8... Support insulator tube, 9a, 9b... Electrode fittings, 1o... Protective insulator for movable electrode, 11... Protective cover, 14... Contactor ,
16... Rack, 17... Movable electrode, 18... Contactor, 25... Connection rond, 26... Operating shaft, 27
...First driving gear, 3o... Interlocking shaft, 31... First driven gear, 32... Second driven gear, G... Foundation,
Pl... Monument fixed electrode, P2... Second fixed electrode. Patent applicant Nippon Insulator Co., Ltd. Agent Patent attorney On1) Hironobu

Claims (1)

[Claims] 1. A first fixed electrode is provided at the tip of the support insulator tube, a second fixed electrode is provided at the tip of the support insulator spaced parallel to the support insulator tube, and the first fixed electrode A movable electrode forming an electric path is attached so as to be slidable in the direction of the electric circuit so that it can move toward and away from the second fixed electrode, and the movable electrode is attached between the tip of the support insulator and the tip of the support insulator. A disconnector characterized in that a protective insulator for a movable electrode containing an electrode is installed therein, and a protective cover for housing the movable electrode at the time of disconnection is provided on the opposite side of the protective insulator for the movable electrode to seal the support insulator. . 2. The disconnector according to claim 1, wherein the movable electrode is slidably operated by a drive gear rotationally driven by an external operation meshing with a rack carved on the movable electrode.