JPH0615444Y2 - Cubicle type gas insulated switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a cubicle type gas insulated switchgear.

[Prior Art] FIGS. 5A and 5B show a schematic configuration of a conventional cubicle type gas insulated switchgear, and FIG. 6 shows a single wire connection diagram of the cubicle type switchgear. FIG. 7 shows a plan view of a power receiving facility having a working line and a protection line constructed by using this conventional switchgear. The switchgear shown in FIG. 5 is housed in each of the normal and spare switchgear units A and B.

In these figures, reference numeral 1 is a pedestal, and 2 is a cubicle-shaped outer shell container supported on the pedestal 1. The inside of the outer shell container 2 is divided by partition walls 3 and 4 into first to third equipment storage chambers 2a to 2c. The switchgear components for three phases are collectively housed in these device accommodating chambers, but since the configuration of each phase is basically the same, the arrangement of the switchgear component for one phase will be described below. The configuration will be described. In the equipment storage room 2a, the current transformer CT, the lightning arrester LA, and the disconnector DS which are fitted to the lead-in conductor of the overhead wire lead-in bushing BUSH
1 and the grounding switch ES1 are stored. Connection conductor 5
Are arranged so as to penetrate the partition wall 3, one end of the connection conductor 5 is connected to the disconnector DS1 and the other end is connected to one end of the circuit breaker GCB. A circuit breaker GC is installed in the equipment storage room 2b.
B, a disconnecting switch DS2 and a grounding switch ES2 are collectively arranged for three phases, and a busbar conductor connected to an adjacent unit B is connected to one side wall of the outer shell container 2 forming the storage chamber 2a. The spacer 6 is fixed. The partition wall 4 is provided with an insulating spacer 8 penetrating the connecting conductor 7, and one end of the connecting conductor 7 is connected to one end of the disconnector DS3. The device storage room 2c has a disconnecting switch DS3 and a grounding switch E.
A bushing 9 is arranged which is connected to S3 and the transformer TR (Fig. 7).

Each equipment storage chamber 2a to 2c is provided in the gantry 1 which also serves as an operator box.
An operating device for operating the switchgear component equipment housed inside is arranged. Bottom plate 2 forming the equipment storage chamber 2a
The first mechanism case 10 is fixed to the portion A, and the disconnector DS1 and the ground switch E are provided outside the mechanism case 10.
A first disconnecting switch operating device 11 and a first grounding switch operating device 12 for controlling the opening and closing of S1 are arranged. Bottom plate 2A forming a device storage chamber 2b in which a circuit breaker GCB is arranged
A second mechanism case 12 is fixed to this portion, and a second grounding switch operating device 13 for controlling opening / closing of the grounding switch ES2 is arranged outside the mechanism case 12. The bottom plate 2A is provided with a mounting portion for the circuit breaker GCB.
The circuit breaker GCB is fixed so as to project to the side, and is opened / closed by the circuit breaker operating device 14. Further, a third mechanism case 15 is fixed to a portion of the bottom plate 2A forming the equipment storage chamber 2b, and a second disconnector operating operator 16 for operating the disconnector DS2 is arranged outside the mechanism case 15. Has been done. A fourth mechanism case 17 is fixed to a portion of the bottom plate 2A forming the device storage chamber 2c, and a third earthing switch operator 18 and a disconnector for operating the earthing switch ES3 are provided outside the mechanism case 17. A third disconnector operating device 19 for operating the DS3 is arranged.

[Problems to be Solved by the Invention] For example, when the switchgear component is housed in the outer shell container 2 in which SF6 gas is sealed, the total weight of the outer shell container 2 reaches several tons. Therefore, the cradle 1 is a very heavy outer shell container 2
It is required to have sufficient strength to support the.
Therefore, in order to reinforce the gantry 1, it has been proposed to dispose reinforcing beams inside the gantry 1. However, in the conventional cubicle type insulated switchgear, the mechanism case (1
0, 12, 15, 17), when the beam is actually provided, the beam interferes with the assembly, repair and operation of the plurality of operating devices. Therefore, conventionally, in order to obtain the strength required for the gantry 1, a thick pillar member or a thick wall member has been used as a pillar member and a wall member forming the gantry. Therefore, the gantry used in the conventional device has a problem that the weight is heavy and the manufacturing cost is high.

An object of the present invention is to provide a cubicle type gas-insulated switchgear which solves the problems of the conventional device.

[Means for Solving the Problems]

In order to solve the above-mentioned problems of the conventional device, in the present invention, as shown in the embodiment shown in the drawings, a circuit breaker GCB, a disconnector DS, and an outer shell container 2'in which an insulating gas is enclosed are provided. A switchgear operating device 24, a disconnecting switch operating device (25, 27, 28) and a grounding switch operating device (26) are housed in a pedestal 1 ′ for accommodating switchgear components such as an earthing switch ES and supporting an outer shell container 2 ′. , 29, 30) are arranged in the cubicle type gas insulated switchgear, and the following configuration is adopted.

A collective type mechanical case 31 having a mechanism housing chamber that communicates with the chamber of the outer shell container 2'is placed in the gantry 1 '. The bottom plate 2'of the outer shell container 2'is designed so that the collective mechanism case 31 serves as a reinforcing structural member that supports a part of the load of the outer shell container 2 '.
It is fixed between A and the bottom portion 1'A of the mount 1 '. In addition, the switch operating device and the earthing switch operating device are attached to the outside of the collective type mechanical case, and the disconnect operating device (25, 27, 28)
And a part of the operating force transmission mechanism (link mechanism, crank mechanism, etc.) for transmitting the operating force output from the grounding switch operating device (26, 29, 30) to the disconnecting switch and the grounding switch is arranged in the mechanism housing chamber. .

In order to facilitate the arrangement of the operating force transmission mechanism, the switchgear component equipment may be arranged in one gas space formed in the outer shell container.

In order to facilitate the assembly, a box-shaped case whose one end is opened is used as the collective mechanism case 31, and one end of the case is welded and connected to the peripheral portion of the opening formed in the bottom plate of the outer shell container to form a mechanism. The other end of the case 31 is attached to the attachment means (32, 33,
38) to the bottom of the frame.

In order to facilitate the assembly of the operating force transmission mechanism, the disconnecting switch operating device and the grounding switch operating device are attached to one side face 31a of the mechanism case 31, and the other side face 31c opposite to the one side face 31a. A window portion is provided, and the window portion 31b
To be able to assemble through. After the assembly, the window 31b is airtightly closed with a removable lid member 31i.

[Operation] Conventionally, the overall strength of the gantry has been increased by increasing the strength of the members constituting the gantry. However, the inventor used a mechanical case arranged inside the gantry to improve the strength of the gantry. I thought to increase. Even when the mechanical case is used to reinforce the gantry, workability and economic efficiency deteriorate if the interior of the gantry becomes complicated or the gantry becomes large in size. Therefore, in the present invention, a collective type mechanical case is used for each of the disconnecting switch operating device and the grounding switch operating device. The collective type mechanical case has a considerably large size because it houses a part of the operating force transmission mechanism of each operating device. By fixing this large package type mechanical case between the bottom plate of the outer shell container and the bottom of the gantry, the mechanism case becomes a reinforcing structural member that supports a part of the load of the outer shell container. When the collective mechanism case is used as the reinforcing structure member in this way, a member which is lighter and cheaper than the conventional member can be used as a member (a pillar member, a wall member, etc.) constituting the gantry. Therefore, according to the present invention, the weight of the gantry can be made lighter than before, and the gantry can be manufactured in a small size and at a low cost.

Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a schematic configuration of an embodiment of the present invention,
FIG. 2 shows a schematic longitudinal sectional view of the embodiment shown in FIG.
The single line connection diagram of this embodiment is the same as the conventional device shown in FIG.

In the embodiment shown in FIG. 1 and FIG. 2, unlike the conventional device, one device storage chamber (insulating gas space) is formed in the outer shell container 2 ′ without providing a partition wall in the outer shell container 2 ′. There is.
In this embodiment, the outer shell container 2'and the mount 1'as much as possible.
In order to reduce the size of the device, the arrangement of the opening / closing device components arranged in the outer shell container 2'has been devised. The overhead wire drawing bushing BUSH is connected to the outer shell container 2'through an insulating spacer 21, and the current transformer CT is arranged outside the outer shell container 2 '. In addition, the disconnector DS1 and the ground switch E
S2 is a top plate 2'B of the outer shell container 2'for shortening the lengthwise dimension of the bottom plate 2'A and increasing the installation space.
Is attached to. In order to enable this arrangement, the height of the outer shell container 2'is slightly higher than the conventional one. Further, the second and third disconnectors DS2 and DS3 are fixed to a mounting wall portion (not shown) with their mounting portions facing each other. In this embodiment, the busbar conductors 22 ... Are arranged in a triangle, and a bushing 23, through which a conductor connected to the transformer penetrates, is airtightly fixed to the side wall of the outer shell container 2 '.

The operating devices 24 to 30 arranged inside the gantry 1 ′ are attached to the collective mechanism case 31 except for the circuit breaker operating device 24. In addition, each operating device 25 to 30 uses a mounting bracket or a mounting frame (not shown) for the mechanism case 31.
It is firmly fixed to the side wall of. Inside the mechanism case 31, a link mechanism of the operation force transmission mechanism or a part of the crank mechanism (an operation link or the like) for transmitting the operation force output from each operation device 25 to 30 to each disconnecting switch DS and the ground switch ES. Are arranged.

The structure of the collective mechanism case 31 is shown in detail in the schematic sectional view shown in FIG. 2 and the assembly view shown in FIG. The collective mechanism case 31 has a first side wall 31a to which the operating devices 25 to 30 are attached and the output shafts of the operating devices 25 to 30 rotatably pass through, and a window for an operator to put his / her hand at the time of assembly. A second side wall 31c in which the part 31b is formed, connecting wall parts 31d and 31e connecting the side walls 31a and 31c, and a bottom wall part 31f that is airtightly joined to the lower end parts of these wall parts by welding. And has a box shape that opens upward. A plurality of threaded mounting holes 31q are formed inside the side wall 31c around the window 31b at predetermined intervals. And this window 31b
Is hermetically closed by fixing a cover plate 31i having a plurality of through holes 31h aligned with the mounting holes 31g with bolts 31j ... In the groove on the mounting surface of the lid plate 31i,
An airtight annular packing 31k surrounding the window portion 31b is inserted and fixed.

The upper ends of the walls 31a, 31c, 31d and 31e are hermetically joined by welding to the peripheral portion of the rectangular hole or opening 2'A1 formed in the bottom plate 2'A of the outer shell container 2 '. Therefore, with the mechanism case 31 fixed to the bottom plate 2′A of the outer shell container 2 ′, the mechanism housing chamber formed inside the mechanism case 31 communicates with the chamber of the outer shell container 2 ′. A pair of mounting leg portions 31m and 31n are provided on the lower ends of the side walls 31a and 31c so as to project therefrom. These mounting legs 31m and 31n are L-shaped metal fittings 32 and 33.
Is fixed to the bottom portion 1'A of the pedestal 1 '. Four screw holes into which the tightening bolts 34 ... Are respectively screwed are formed in the mounting leg portions 31m and 31n, and the L-shaped metal fittings 32 and 3 are formed.
In the standing portions 32a and 33a of 3, the mounting leg portions 31m and 3
Aligned with 1n screw hole and tightening bolt 34 penetrates 4
Four through holes are formed, and the contact portion 32b is formed with four through holes which are aligned with the four screw holes 35 formed in the bottom portion 1'A of the pedestal 1'and through which the tightening bolts 36 pass. . The tightening bolts 34 and 36 are attached via spring washers 37, respectively. When the mechanism case 31 is fixed to the bottom portion 1'A of the frame 1'using the L-shaped metal fittings 32 and 33 as described above, a slight dimensional error of the mechanical case causes a slight increase in the erected portion 32a of the L-shaped metal fittings 32 and 33. 33a
It can be easily adjusted by making the through hole formed in the above into a long hole or by interposing an adjusting plate between the contact portions 32b and 33b of the L-shaped metal fitting and the bottom portion 1'A of the mount 1 '. .

As in this embodiment, when the upper portion of the mechanism case 31 is fixed to the bottom plate 2'A of the outer shell container 2'and the lower portion is fixed to the bottom portion 1'A of the frame 1'with L-shaped metal fittings, the outer shell container 2 '. Before assembling with the gantry 1 ', it is possible to assemble each operation unit and operation force transmission mechanism at a place where the assembly is easy, and there is an advantage that workability is improved.

Various fixing means can be used to fix the mechanism case 31 to the frame 1 '. For example, as in the embodiment of FIG. 4, the mounting foot portions 3 are provided at the four corners of the bottom wall 31f of the mechanism case 31.
One end of 8 is fixed by welding, and the flange portion provided at the other end of the mounting foot portion 38 is fixed to the bottom portion 1'A of the pedestal 1 by using a plurality of tightening bolts 40 and spring washers 41. May be. A through hole through which the bolt 40 penetrates is formed in the flange portion of the mounting foot portion 38, and a screw hole into which the bolt 40 is screwed is formed in the bottom portion 1'A of the mount 1 '. In this embodiment, unlike the embodiment shown in FIG. 1, it is not possible to adjust the dimensions, but it is possible to surely obtain the strength that can sufficiently bear the load applied to the mechanism case.

In each of the above embodiments, all the operating devices except the operating device for the circuit breaker are mounted on the collective type mechanical case, but it is not necessary to forcibly collect all the operating devices in one place. Regarding the operating device, which is preferably provided separately in terms of design in view of various requirements such as assembly and safety, a mechanism case may be independently provided and the operating device may be attached to this mechanism case as in the conventional case.

[Effect of device]

According to the present invention, since the collective type mechanical case is fixed between the bottom plate of the outer shell container and the bottom of the pedestal, the mechanical case serves as a reinforcing structural member for supporting a part of the load of the outer shell container, and a member constituting the pedestal ( As the pillar member, the wall member, etc., a lighter and cheaper member than the conventional one can be used, the weight of the gantry can be made lighter than the conventional one, and the gantry can be manufactured in a small size and at a low cost. Further, according to the present invention, it is possible to provide an opening / closing device that is easy to assemble.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, and FIG. 2 is a first diagram.
FIG. 3 is a schematic vertical sectional view of the embodiment shown in FIG. 3, FIG. 3 is a perspective view showing the structure of a mechanism case used in the embodiment of FIG. 1, and FIG. 4 is a schematic vertical sectional view showing another embodiment of the present invention. , Fig. 5 (A)
Is a schematic configuration diagram of a conventional device, FIG. 5 (B) is a schematic vertical cross-sectional view of FIG. 5 (A), FIG. 6 is a single wire connection diagram of the device of the prior art and the embodiment of FIG. 1, and FIG. [Fig. 3] is a plan view showing an example of power receiving equipment in which a gas insulated switchgear is used. DS1 to DS3 ... Disconnectors, ES1 to ES3 ... Grounding switches, GCB ... Circuit breakers, 1, 1 '... Frame, 1A,
1'A ... bottom, 2,2 '... outer shell container, 2A, 2'A
...... Bottom plate, 24 ...... Circuit breaker operating device, 25, 27, 28
...... Disconnector operating device, 26, 29, 30 ...... Grounding switch operating device, 31 ...... Mechanical case, 31a, 31c ...... Side wall, 31b ...... Window portion, 31i ...... Lid plate, 31m, 31n
...... Mounting legs, 32,33 …… L-shaped metal fittings (mounting means).

Claims (3)

[Scope of utility model registration request] 1. A switchgear, disconnector, grounding switch, and other switchgear component equipment are housed in an outer shell container in which an insulating gas is sealed, and a breaker operator and disconnector are installed in a frame supporting the outer shell container. In a cubicle gas-insulated switchgear in which an actuator for a vessel and an operator for a grounding switch are arranged, a collective mechanism case having a mechanism storage chamber communicating with the chamber of the outer shell container is disposed in the gantry, and The shape mechanism case is fixed between the bottom plate of the outer shell container and the bottom of the mount so as to be a reinforcing structural member that supports a part of the load of the outer shell container, and the disconnector operator and the earthing switch operator are A part of the operation force transmission mechanism that is attached to the outside of the collective mechanism case and that transmits the operation force output from the disconnecting switch operating device and the grounding switch operating device to the disconnecting switch and the grounding switch is described above. A cubicle type gas-insulated switchgear characterized by being arranged in a mechanism storage room. 2. The opening / closing device constituting device is arranged in one gas space formed in the outer shell container, the mechanism case is formed in a box shape with one end open, and the one end is formed of the outer shell container. The cubicle type gas insulated switchgear according to claim 1, which is welded and connected to a peripheral portion of an opening formed in the bottom plate, and the other end of the mechanism case is fixed to the bottom portion of the gantry through a mounting means. . 3. The disconnecting switch operating device and the grounding switch operating device are attached to one side wall of the mechanism case, and a window portion is provided on the other side wall facing the one side wall, and the window portion is provided. The cubicle type gas insulated switchgear according to claim 1, which is hermetically closed by a removable lid member.