JP3314000B2 - Gas insulated switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulated switchgear, and more particularly to an improvement of a gas insulated switchgear in which an operation device for opening and closing the switch is externally connected to a sealed container for accommodating the switch.

[0002]

2. Description of the Related Art Gas-insulated switchgears are widely used in electric power systems because the switchgear and the current-carrying conductor are housed in a closed container and are excellent in miniaturization, insulation performance and safety.

[0003] Such a gas insulated switchgear is provided with an operating mechanism for opening and closing the opening and closing unit. For example, an operating mechanism as shown in FIG. 4 is known.

FIG. 4A is a plan view of the operation mechanism, and FIG. 4B is a front view of the operation mechanism. FIG.
5 is an enlarged view of a rod and a lever portion of the operation mechanism shown in FIG.

In these figures, reference numeral 1 denotes a sealed container for accommodating a switch (not shown), 2 denotes an operating device for opening and closing the switch, 3 denotes an operating shaft of the closed container 2, and 4 denotes an operating shaft of the operating device 2. The operating shaft 5, 5 is a connecting link connected between the operating shaft 3 and the rod, 6 is a rod, 7 is a lever connected between the operating shaft 4 and the rod 6, 8 is the connecting link 5, rod 6, lever 7, etc. Is a gantry supported by the closed vessel 1 and on which the operating device 2 is mounted.

In this operating mechanism, an operating shaft 3 for operating an opening / closing portion in the closed container 1 is provided so as to protrude from the closed container 1, and an operating shaft 4 for transmitting an operating force from the operating device 2. Is protruding. The two operation shafts 3 and 4 are connected via a connection mechanism 8. The operating device 2 is operated, and the operating shaft 4
Is rotated in the direction of arrow A, the rod 6 and the like move in the direction of arrow B, and the operating shaft 3 rotates in the direction of arrow C to
It is configured to open and close the switch inside.

As a technique related to this type of apparatus, for example, Japanese Patent Laid-Open No. 4-43519 is known.

[0008]

However, in the above-mentioned conventional gas insulated switchgear, the operating shaft 3 of the sealed container 1 and the operating device 2
Are connected via the connecting mechanism 8 between
Although the play between the opening of the closed container 1 and the opening of the operation device 2 can be absorbed, the transmission mechanism for forming the coupling mechanism 8 is complicated, and the transmission efficiency is reduced. Also pins,
There are many small parts such as links, and the operating device 2 is usually
Generally, a large-sized and heavy-weight one is used, for example, because a bus voltage that can be widely used from a low voltage to a high voltage is used.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide a gas insulated switchgear which does not require a frame for an operating device and can reduce the size of the gas insulated switchgear.

[0010]

The present invention employs the following means in order to solve the above-mentioned problems.

A closed container having an opening and containing a switch connected to the bus, and an opening supported by a flange which is fitted to the opening of the closed container and for opening and closing the switch; The operation mechanism is stored,
A gas-insulated switchgear comprising an operating device having a drive shaft of the operating mechanism directly coupled to an operating shaft of the switch, and operating the operating device to open and close the switch. Consists of an upper bus unit in which the operating device is arranged below the closed container and a lower bus unit in which the operating device is arranged above the sealed container, and the upper bus unit and the lower bus unit are arranged vertically. The operating device of the upper bus unit and the operating device of the lower bus unit are horizontally arranged adjacent to each other.

[0012]

[0013]

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

First, the operation device directly connected to the closed container and its internal structure will be described with reference to FIG.

In the drawing, reference numeral 1 denotes a sealed container for accommodating a switch (not shown), 11 denotes a flange constituting an opening of the sealed container 1, 2 denotes an operating device, 21 denotes an operation drive motor, 2
2 is a worm driven by an operation drive motor, 23
Is a worm wheel to which the driving force of the worm 22 is transmitted, 24 is a spring accumulation lever driven by the worm wheel 23, 25 is a spring that accumulates driving force by rotation of the spring accumulation lever 24, and 26 is a spring accumulation lever 2
An intermediate lever 27 that is rotated by the driving force of the spring 25 via the pin 4, a scissor lever 27 that transmits the driving force of the intermediate lever 26 to the operating shaft, an operating shaft 28 that is rotated by the scissor lever 27 and transmits the operating force, Reference numeral 29 denotes a flange that forms an opening of the operating device 2.

The operating shaft 28 of the operating device 2 is directly connected to an operating shaft for operating a switch (not shown) of the closed casing 1.

Further, in this embodiment, the operating device 2 is configured for a gas insulated switchgear having a relatively low bus voltage, and each component is manufactured with higher precision than the conventional one. ing.

Next, the operation of the operating device 2 will be described with reference to the drawings.

When the motor 21 rotates in the direction of arrow D,
The rotational force is transmitted to the worm 22 and further to the worm 2
2 and the worm gear 23 combine to change the transmission direction of the operating force. The worm wheel 23 is engaged with the spring energy storage lever 24, and the driving force of the worm wheel 23 is transmitted to the spring accumulation lever 24, and the spring accumulation lever 24 rotates in the direction of arrow E. By this rotation, the spring 25 is compressed in the direction of arrow F, and the spring 25 shifts from the released state to the charged state. When the spring 25 reaches the dead point, the worm wheel 23 and the spring accumulation lever 24 are disengaged, the intermediate lever 26 and the spring accumulation lever 24 are engaged, and the spring 25 is opened in the arrow G direction. Spring 25
The intermediate lever 26 is rotated in the direction of arrow H by the driving force accumulated in the closed container 1, and the rotational force is transmitted to the operation shaft 28 via the scissor lever 27, and the operation shaft 28 rotates in the direction of arrow I, The operating force is transmitted to an operating shaft (not shown) inside the switch to open and close a switch (not shown).

As described above, according to the present embodiment, since the operating device 2 is configured exclusively for the gas insulated switchgear having a relatively low bus voltage, the operating device 2 can be downsized. Since the components are accurately and compactly formed, the operating device 2 can be reduced in size and weight. Further, it is not necessary to provide a stand or the like for the operating device unlike the conventional one, and the operating device 2 can be directly attached to the closed container opening 11.

Next, the arrangement of operating devices in the gas insulated switchgear will be described with reference to FIGS.

FIG. 1 is a side view of the gas insulated switchgear, and FIG. 2 is a front view of a plurality of gas insulated switchgears viewed from the direction of the arrow in FIG.

In these figures, 1A to 1C are high-pressure side (input side) upper sealed containers, 1D to 1F are low-pressure side (output side) upper sealed containers, and 1A 'to 1C' are high-pressure side (input side).
Lower sealed container, 1D'-1F 'is a low pressure side (output side) lower sealed container, 2A-2C is a high pressure side (input side) upper operation machine,
2D ~ 2F is the lower pressure side (output side) upper operation machine, 2A '~ 2
C ′ is a high-pressure side (input side) lower operation device, 2D ′ to 2F ′ are low-pressure side (output side) lower operation devices, and 100A and 100A ′ are housed in an upper sealed container 1A and a lower sealed container 1A ′, respectively. Disconnectors, 101A1 and 101A 'are spacers for gas separation between the upper sealed container 1A and the circuit breaker unit and between the lower sealed container 1A' and the circuit breaker unit, respectively. 102A is a circuit breaker unit for accommodating the circuit breaker.
3A is a circuit breaker housed in a circuit breaker unit, 104A
Is a line unit, 105A is a disconnector, 106A is a lightning arrester, 107A is a ground switch, 108A to 108F are cubicles, 109A is a circuit breaker mechanism for shutting off the circuit breaker 103A, and 110A is a line unit 104A.
Cable output from

The high pressure side upper closed containers 1A to 1C accommodating the disconnecting switch (100A) are connected to the high pressure side upper operation devices 2A to 2C.
C together with the upper main bus unit, and the disconnector (100
The high-pressure-side lower sealed containers 1A 'to 1C' accommodating A ') constitute a lower main bus unit together with the high-pressure-side lower operation machines 2A' to 2C '.

As described above, according to the present embodiment, between the upper sealed containers 1A to 1F and the lower sealed containers 1A 'to 1F', both the operating devices 2A to 2F and the operating devices 2A 'to 2F are provided.
C 'is arranged adjacent to the same position. Here, the upper main bus units 1A to 1F and 2A to 2F have the same specifications as the lower main bus units 1A to 1F and 2A to 2F. The bus unit and the lower main bus unit can be arranged vertically. That is, the upper main bus unit and the lower main bus unit can be configured using the same unit.

In order to make the above arrangement possible, as shown in FIG. 3, the opening of the sealed container 1 and the opening of the operating device 2 are constituted by flanges 11 and 29 having a fitting structure. It is fixed by bolts that are not attached. By processing this part with high accuracy, centering becomes easy and a direct link system becomes possible. Further, as shown in the figure, since the operating device 2 is supported by the flanges 11 and 29, the operation which has been attached to the conventional closed container is performed. A frame or the like for supporting the machine is not required, and each main bus unit can be arranged compactly.

Further, according to the present embodiment, since the direct link system is employed, the transmission efficiency can be improved, the number of parts can be reduced, and the size of the device can be reduced.

[0029]

As described above, according to the present invention, since the sealed container and the operating device are directly connected, the main bus unit can be reduced in size, and two airtight containers constituting the upper and lower main bus units can be provided. Can be arranged adjacent to the same position, and the gas insulated switchgear can be downsized.

[Brief description of the drawings]

FIG. 1 is a side view of a gas insulated switchgear according to an embodiment of the present invention.

FIG. 2 is a front view of a plurality of gas insulated switchgears arranged in the direction of the arrow in FIG.

FIG. 3 is a view showing an operating device directly connected to a closed container according to the embodiment and an internal structure thereof.

FIG. 4 is a view showing an operation mechanism for opening and closing an opening and closing section of a gas insulated switchgear according to the related art.

5 is an enlarged view of a rod portion in the operating device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 1A-1F Upper closed container 1A'-1F 'Lower closed container 11 Opening (flange) of closed container 2 Operating device 2A-2F Upper operating device 2A'-2F' Lower operating device 29 Opening device of operating device ( Flange) 100A, 100A 'disconnector

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhiko Takahashi 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside the Kokubu Factory (72) Inventor Minoru Yabuki 4-3-1, Higashi-Onumacho, Hitachi City, Ibaraki Prefecture No. ICC Corporation (56) References JP-A-60-131010 (JP, A) JP-A-2-266809 (JP, A) JP-A-61-167308 (JP, A) JP-A-63-209409 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01H 33/42 H01H 33/56 H02B 13/02

Claims (1)

(57) [Claims] 1. An airtight container having an opening and accommodating a switch connected to a bus, an opening supported by a flange fitted to the opening of the airtight container, and opening and closing the switch. An operating mechanism for housing an operating mechanism for operating the operating mechanism, and a driving shaft of the operating mechanism directly connected to an operating axis of the switch; and a gas insulated switchgear for operating the operating device to open and close the switch. The gas insulated switchgear includes an upper bus unit in which the operating device is arranged below the closed container and a lower bus unit in which the operating device is arranged above the sealed container, and the upper bus unit. And an operating device of the upper bus unit and an operating device of the lower bus unit are horizontally arranged adjacent to each other.