JPH0747927Y2 - Gas insulated switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a gas-insulated switchgear installed in an electric station such as a substation.

[Prior Art] A gas-insulated switchgear installed in a substation or the like is configured by combining a plurality of elements in which predetermined devices are housed in a container. For example, in the gas insulated switchgear shown in FIG. 5, a power receiving element E1 including a circuit breaker CB, a cable head CHd and a line side disconnector DS1, a circuit breaker CB, a circuit breaker inspection grounding device ES21, ES22 and a current transformer. Circuit breaker element E2 consisting of CT
And a first busbar element E3 composed of the busbar disconnector DS21 and the busbar BS1 and a second busbar element E4 composed of the busbar disconnector DS22 and the busbar BS2 form a plurality of switchgear unit U1, U2 ,. The switchgear units are arranged side by side so as to form a row board along the bus bar.

6 and 7 schematically show the external appearance of the gas-insulated switchgear shown in FIG. 5, in which the power receiving element E1 is a vertically long container 2 installed on the pedestal 1.
It is configured by housing the cable head CHd, the grounding device ES1, and the disconnector DS1 therein. Cable head
CHd is attached to the bottom of container 2 and this cable head C
A cable C launched from an underground cable bid is connected to Hd.

The circuit breaker element E2 includes a circuit breaker CB and a grounding device in a vertically long cylindrical container 4 supported on an operator box 3 which also serves as a pedestal.
The ES21 and ES22 and the current transformer CT are housed, and the branch pipe portion 4a provided at the upper rear portion of the container 4 is insulated by an insulating spacer (not shown) at the branch pipe portion 2a provided at the upper front portion of the container 2. ) And the expansion joint pipe 5, and the circuit breaker CB is connected to the disconnector DS1 in the container 2 through an appropriate connecting conductor and a conductor penetrating an insulating spacer provided between the containers 4 and 2. Has been done. The movable contactor of the circuit breaker CB is connected to the operating device in the operating device box 3 via an insulating operating rod. The first and second busbar elements E3 and E4 respectively include busbar conductors constituting the busbars BS1 and BS2 and disconnectors DS21 and DS22 in a cross-shaped container 6 respectively.
And the container 6 and 7 are the branch pipes arranged vertically on the front surface of the container 4 with the bus conductors housed inside being oriented in the lateral direction (the arrangement direction of the units). It is connected to the portions 4b and 4c via an insulating spacer (not shown). The busbar conductors in the containers 6 and 7 are the disconnectors DS21 and DS22, the conductors penetrating the insulating spacers provided between the containers 6 and 7 and the container 4, respectively.
It is connected to the circuit breaker CB via an appropriate connection conductor provided inside. Also, the container 6 of the adjacent switchgear unit
Expansion joint pipe 10 (see Fig. 6) between each other and container 7
And busbars BS1 and BS2 extending in the lateral direction by connecting the busbar conductors in the containers 6 and 7 of each unit to each other. .

The containers 2, 4, 6, and 7 have an airtight structure, and SF ₆ gas is sealed in each container at a predetermined pressure. Reference numerals 8 and 9 are operating device boxes accommodating operating devices for operating the disconnectors DS21 and DS22 in the containers 6 and 7, respectively.

In the above gas-insulated switchgear, when inspection or repair is required, it is necessary to remove the element of the unit requiring inspection or repair and replace it with another element. Circuit breaker element of switchgear unit U2
If an accident occurs in E2, the breaker element E2 must be removed and replaced. In this case, since the element E2 is sandwiched between the units U1 and U3 on both sides and the element E1 is behind it, in order to remove the element E2 of the unit U2, the container 4 and the container 2 of the element E1 can be removed. After removing the expansion joint pipe 5 that connects between and, and further removing the container 4 from the operator box 3, as shown in FIG. 7, a chain block supported by rails 12 fixed to the ceiling 11 It is necessary to lift by 13 etc. and move along the rail.

[Problems to be Solved by the Invention] In a conventional gas-insulated switchgear, a lifting means connecting metal fitting is attached to the upper end of each container in order to lock a lifting means such as a chain 14 for lifting the container of the element that constitutes each unit. I had attached a hook. Therefore, when hoisting the container 4, it is necessary to secure a wide space equal to or higher than the height of the container 4 between the upper end of the gas-insulated switchgear and the ceiling 11. There is a problem that the height h becomes high and the cost becomes high.

An object of the present invention is to provide a gas-insulated switchgear capable of being housed in a building whose ceiling is lower than before.

[Means for Solving the Problems] As shown in FIG. 1 showing an embodiment of the present invention, the present invention includes elements E1, E2, etc., in which a device is housed in a container filled with an insulating gas. In the present invention, there is provided a gas-insulated switchgear comprising a plurality of switchgear unit U1, U2, ... arranged side by side. In the present invention, among the elements constituting each of the plurality of switchgear units, at least adjacent elements In order to be able to change the posture of the container 4 by rotating the container 4 of the element E2 that needs to be lifted to a higher position, the fitting means for connecting the lifting means to the opposite side surfaces of the container 4 respectively. I have installed 20 each one. Each hoisting means connecting fitting 20 is provided with a shaft portion 20a which is arranged with its central axis aligned with the horizontal line passing through the center of gravity of the element E2 and welded to the container 4 of the element.

In the present invention, among the elements constituting the switchgear unit, at least the element of the element that needs to be lifted to a position higher than the adjoining element at the time of removal may be provided with the lifting means connecting metal fitting, and is located at the end. Like the element to be attached, the metal fitting for connecting the lifting means provided on the element (for example, the element E2 of the unit U1 in FIG. 1) that can be removed using the space on the side without lifting up to a position higher than the adjacent element. May be provided at the top of the container or at the center of gravity.

[Operation] As described above, the element E2 that needs to be lifted to a position higher than the adjacent element is provided on the opposite side surfaces of the container 4 with the central axis aligned with the horizontal line passing through the center of gravity of the element E2. If the lifting means connecting metal fittings 20 each having the shaft portion 20a welded to the container 4 are provided one by one, the shaft portions 20a, 20a of the lifting means connecting metal fittings 20, 20 on both side surfaces of the container 4 of the element E2 are provided. The element E2 can be easily turned to an arbitrary posture while hooking a connecting fitting such as a hook provided on the lower end of the lifting means such as a wire or a chain. Therefore, for example, as shown in FIG. 4, the container 4 is rotated so that its direction is A → B.
→ C → D while changing, lifting, and finally container 4
Can be moved in the direction parallel to the ceiling 11 of the building. Therefore, the height of the ceiling of the building can be made lower than in the conventional case in which the container 4 is lifted upright.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 3 show an embodiment of the present invention. In this embodiment, in the gas insulated switchgear having the structure shown in FIGS. 5 to 7, the breaker element E2 of the unit U2 is used. Lifting means connecting fittings 20, 20 are provided on both side surfaces of the container 4 facing each other in the longitudinal direction of the busbars BS1 and BS2, and these connecting fittings 20, 20 are provided with lifting means for lifting means such as chains and wires. A hooking means-side connecting metal fitting such as a hook attached to the lower end is connected. As shown in FIG. 3, each connecting fitting 20 includes a shaft portion 20a fixed to the side surface of the container 4 by welding or the like, and an end of the shaft portion 20a for preventing the connecting fitting on the lifting means side from coming off. And an enlarged diameter portion 20b provided in the portion. Then, the shaft portions 20a, 20a of the pair of coupling fittings 20, 20 attached to both sides of the container 4
Are provided with their respective central axes aligned with the horizontal line passing through the center of gravity of the element E2.

When the connecting metal fittings 20, 20 are configured as described above, the connecting metal fittings 20, 20 are connected to the connecting metal fittings on the lifting means side to lift the container 4 and the container 4 is connected.
The container 4 can be easily rotated about 0, 20 as a rotation center, and the container 4 can be stopped in any posture during the rotation.

On the ceiling of the building containing the gas-insulated switchgear, the busbar BS1
A rail 12 extending in a direction parallel to the longitudinal direction of BS2 is fixed, and a hanging jig 16 is supported on the rail 12. This suspension jig is composed of a suspension type carriage 16a supported by rails 12 via wheels, and an arm 16b connected to the carriage 16a with a structure that can rotate in the horizontal direction. The suspension jig is wound around both ends of the arm 16b. Devices 13, 13 are installed. Connecting metal fittings 15 and 15 made of hooks or the like are attached to the lower ends of the wires 14 and 14 as a lifting means that is wound or unwound by the winding device 13 and 13, and these connecting metal fittings 1 and 15 are used for connecting the lifting means. By hooking the shaft parts 20a, 20a of the metal fittings 20, 20, the wire 14,1
4 (lifting means) and the connecting fittings 20, 20 are connected.

The above-mentioned connecting fittings 20, 20 may be provided at least in all of the vertically elongated containers of the element that need to be lifted higher than the adjacent element when they are removed, but provided in all the containers of the elements constituting each unit. You can leave it.

In the above gas insulated switchgear, for example, when an accident occurs in the element E2 of the unit U2 and it becomes necessary to replace the element E2, the expansion joint pipe 5 connecting the element E2 in which the accident occurred to the element E1. After removing the element E2 from the elements E3 and E4 and further removing the element E2 from the operator box 3, the connecting fittings 15 and 15 at the lower ends of the wires 14 and 14 as the lifting means are connected to the connecting fitting 2
Connect to 0,20. Then the upper end of the container 4 and the wires 14,14
And the container 4 are connected by detents 17 and 17 (see FIG. 2) to prevent the container 4 from rotating around the connecting members 20 and 20, and the winding device 13 causes the wires 14 and 14 to rotate. Is wound and the container 4 is raised in the order of A → B → C → D as shown in FIG. Then, for example, when the container 4 is raised to the position A, the winding of the wires 14 and 14 is stopped, and the arm 16b of the hanging jig 16 is rotated 90 degrees to move the container 4 to the position shown in FIG. Change direction. Next, when the container 4 is raised to the position B, the stoppers 17, 17 are removed, and the container 4 is connected with the fittings 20,
It is rotated by a certain angle about the central axis B1 of 20. Since the connecting fittings 20, 20 are provided at the center of gravity of the element E2, the container 4 can be easily rotated. By rotating the container 4 at the position B in this manner, the upper end corner portion 4A of the container 4 can be moved to a position where it does not interfere with the hanging jig 16, and the container 4 can be moved further by the distance e. To do so.

The winding device 13 further winds the wires 14 and 14 to form a container 4
To the position of C, and connect the metal fittings 20, 20 to the central axis C
The container 4 is further rotated about 1. As the container 4 is rotated in this manner, the lifting distance of the container 4 becomes longer. Then, when the container 4 is raised to the position D, the longitudinal direction of the container 4 is aligned with the horizontal direction. In this state, the lower end of the container 4 is positioned above the container of the adjacent element by a slight distance t. In this state, the wires 14 and 14 and the container 4 are connected by a rotation stopper to prevent the container 4 from rotating, and the winding device 13 is moved along the rail 12 to carry out the element E2. The loading of the new element E2 can be performed by the reverse operation to the above.

As described above, when the lifting means connecting metal fitting is provided at the position of the center of gravity of the container 4, even if the distance d between the units is small, the element is lifted and turned sideways without switching wires. be able to. Therefore, the height of the ceiling depends on the height of the gas insulated switchgear and the container 4
The width b of the container 4 and the small gap t required for carrying out the container 4 may be set in consideration of the height a of the container 4 compared to the case of FIG. The height h of the ceiling can be significantly reduced.

[Advantage of the Invention] As described above, according to the present invention, among the elements constituting the gas-insulated switchgear, the elements that need to be lifted to a position higher than the adjacent element are provided on opposite side surfaces of the container. Since the lifting means connecting metal fittings each having a shaft portion whose central axis coincides with the horizontal line passing through the center of gravity of the element are attached, the posture can be easily changed by rotating the container while lifting it. It is possible to orient the longitudinal direction of the vertically long container in the horizontal direction in a state of being lifted to a position higher than other elements. Therefore, there is an advantage that the height of the ceiling of the building accommodating the gas-insulated switchgear can be reduced, and the equipment cost of the gas-insulated switchgear can be reduced.

[Brief description of drawings]

FIG. 1 and FIG. 2 are schematic side views of main parts showing different states when a container is lifted in an embodiment of the present invention, and FIG. 3 is a structure of a lifting device in the embodiment and a lifting means provided in the container. Explanatory drawing explaining the structure of a metal fitting for connection, FIG. 4 is explanatory drawing explaining the movement of a container at the time of lifting a container, FIG. 5 is a single wire connection diagram which shows an example of the electrical structure of a gas insulated switchgear, FIG. 6 is a plan view showing an example of the external appearance of the gas insulated switchgear of FIG. 5, and FIG. 7 is a side view of the gas insulated switchgear. U1 to U4 …… Switchgear unit, E1 …… Power receiving element,
E2 ... Circuit breaker element, E3 ... First busbar element, E4 ... Second busbar element, 4 ... Vertical container, 13
...... Winding device, 14 ...... Wire (lifting means), 15 ……
Lifting means side connecting metal fitting, 20 …… Lifting means connecting metal fitting.

Claims (1)

[Scope of utility model registration request] 1. A gas-insulated switchgear in which a plurality of switchgear units each having an element in which a device is housed in a container in which an insulating gas is enclosed are arranged in parallel, and each of the plurality of switchgear units is configured. Element (E2) that needs to be lifted to a position higher than the adjacent element at least when removing it
In order to change the posture of the container (4) by rotating the container (4) in the process of lifting, the metal fittings (20) for connecting the lifting means are respectively provided on the opposite side surfaces of the container (4). Each lifting means connection fitting (20) is an element (E2)
A shaft part (20) which is arranged with its central axis aligned with a horizontal line passing through the center of gravity of the element and is welded to the container (4) of the element.
Gas-insulated switchgear characterized by comprising a).