JPH0613544Y2 - 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 is a switchgear main body in which necessary devices including a switch such as a circuit breaker, a disconnector and a grounding device are housed in a metal container filled with insulating gas, and a side of the container. And a mechanism box fixed to a flange of an opening provided in the container, and a mechanism case accommodating a mechanism for transmitting an operation force to a switch in the controller box. And an operating device for operating the switch via the mechanism in the mechanism case.

FIG. 5 shows the structure near the operation box of a conventional gas-insulated switchgear. In FIG. 5, reference numeral 1 denotes a metal container 2 in which SF6 gas is enclosed, and the equipment including the switch is housed in the container. The switchgear body 3 is an operator box arranged on the side of the container 2. Reference numeral 2A denotes a branch pipe portion provided so as to horizontally project from the side surface of the container 2, and an opening portion at a tip of the branch pipe portion 2A serves as an opening portion 4 for connecting an operating mechanism to a switch. A flange 5 is provided around the opening 4, and the back plate 3a of the operation device box 3 is bolted to the flange. A mechanism case 6 is provided in a portion located inside a portion of the back plate 3a of the controller box 3 connected to the flange 5.
Is provided with a hole 3b through which the mechanical case 6 is bolted to the flange 5. A disconnector and a grounding device are arranged in the vicinity of the branch pipe portion 2A in the container 2, and movable contacts of the disconnector and the grounding device are respectively connected to the mechanism in the mechanism case 6 via operation rods. . A disconnecting switch operating device 9 and a grounding device operating device 10 are also arranged in the operating device box 3, and these operating devices are connected to the mechanism in the mechanism case 6 via a link or the like not shown. The mechanism provided in the mechanism case 6 is an operation force transmission mechanism that transmits the operation force given by the operation devices 9 and 10 to the disconnector and the grounding device, and is composed of a link, a lever, and the like.

[Problems to be Solved by the Invention] In the conventional gas-insulated switchgear having the above-described operating device box mounting structure, first, the operating device box 3 is attached to the flange 5 of the opening of the container, and then the mechanism case 6 is attached. Is connected to the flange 5, and then the actuators 9 and 10 are mounted in the actuator box 3. After that, the operation stroke and the like of the switch (the disconnecting switch and the grounding device in the above example) are adjusted in the operator box, and finally, the auxiliary work such as wiring is performed to complete the operation-related assembly work.

As described above, in the conventional gas-insulated switchgear, since the assembling and adjusting work of the operating device has to be performed in a narrow space inside the operating device box, the work is difficult to perform, and the assembly and adjusting work takes time. was there. In addition, the workability was poor because the maintenance and inspection work after assembling the actuator had to be performed in a narrow space inside the actuator box.

An object of the present invention is to provide a gas-insulated switchgear that improves the workability of assembly, adjustment, and maintenance / inspection work by making it possible to assemble and adjust the operation unit and perform maintenance / inspection work in an open space. It is in.

[Means for Solving Problems] In the present invention, the intermediate plate is fixed to the flange of the opening provided in the container of the switchgear body. This intermediate plate is provided with a through hole large enough to penetrate the mechanism case,
The mechanism case is attached to the flange of the opening through the through hole. The operating device is arranged in the plate surface of the intermediate plate and is fixed to the intermediate plate or the mechanism case. The operating device box has a mechanism case and a window portion having a size that allows the operating device to pass therethrough, and a peripheral portion of the window portion is coupled to the intermediate plate.

[Advantage of the Invention] With the configuration described above, the intermediate plate and the mechanism case can be attached to the flange of the opening of the container, and further the actuator can be attached to the mechanism case or the intermediate plate before the operator box can be attached. It is also possible to remove only the operating device box with the operating device and the mechanism case attached. Therefore, the operation device can be incorporated, the operation stroke can be adjusted, the maintenance and inspection work can be performed with the operation device box removed, and the workability of these works can be improved.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 4 shows a configuration of an embodiment of the present invention. 1 is a switchgear main body, 2 is a container of the switchgear main body, 3 is a rear side of the switchgear main body 1 and is attached according to the present invention. The operator box 3 ′ attached by the structure is another operator box arranged on the front side of the switchgear body 1.

The container 2 of the switchgear body 1 includes tubular containers 201A and 20A.
1B is connected to form an inverted L-shaped main container 201, an auxiliary container 202 connected to an opening provided on the front surface of the lower end of the main container via an insulating spacer S1, and a main container 20.
Insulating spacers S are provided on the two branch pipes provided at the upper end of 1.
2 and S3 and busbar disconnector containers 203 and 204 connected to each other, and the lower end of the main container 201 and the auxiliary container 202 are supported on the installation base 20.

On the front surface of the upper part of the main container 201, an opening is provided which opens into the operation device box 3 ', and a breaker CB is supported by a lid plate 21 which hermetically closes the opening. The operating mechanism 2 of the circuit breaker is provided on the outer surface of the cover plate 21 (the surface facing the inside of the controller box 3 ').
2, a circuit breaker operating device 23 arranged in the operating device box 3 ′ is connected to a movable contact of the circuit breaker CB via an operating mechanism 22.

At the lower end of the main container 201, a cable head CHd that pulls in a cable that is erected from the underground is attached, and the terminal conductor of this cable head is in the auxiliary container 202 through the connecting conductor 25 and the penetrating conductor of the insulating spacer S1. Is connected to the lightning arrester LA and the voltage transformer LPT for the instrument.

A branch pipe portion 2A is provided on the lower portion of the back surface of the main container 201, and an opening 4 is provided at the tip of the branch pipe portion 2A. A flange 5 is provided around the opening 4, and a mechanism case 6 is connected to the flange 5. The mechanism case 6 has a flange plate 6a at its end, and the flange plate 6a also serves as a lid that hermetically closes the opening 4.

A support fitting 26 is fixed to the flange plate 6 a of the mechanism case 6, and a conductor 28 is attached to the support fitting via an insulating support 27.
Is supported. The conductor 28 is provided so as to extend in the vertical direction, the movable element 29A of the disconnector DS1 is provided at the upper end of the conductor 28, and the grounding device ESW is provided at the lower end.
One fixed-side element 30B is connected to each. The movable side element 30A of the grounding device ESW1 is also attached to the flange plate 6a, and the movable side element 29A of the disconnector DS1 and the movable side element 30A of the grounding device ESW1 are provided so as to penetrate the flange plate 6a in an airtight and slidable manner. It is connected to the operation force transmission mechanism in the mechanism case 6 via the operation rod. The fixed element 30B of the grounding device ESW1 is connected to the conductor 25 connected to the cable head CHd.

The conductor 3 is attached to the support fitting 31 fixed to the main container 201 above the cable head CHd via the insulating support 32.
One end of 3 and 34 is supported. The conductor 33 extends toward the opening 4, and the fixed side element 29B of the disconnector DS1 is connected to the other end of the conductor 33. The conductor 34 extends vertically in the main container 201, and the current transformer CT is attached to the conductor 34.

The circuit breaker CB has terminals 35 and 36 connected to the movable contact and the fixed contact, respectively, and one end of a conductor 37 extending in the front-rear direction in the upper portion of the container 201 is connected to the movable contact side terminal 35. One end of a conductor 38 is connected to the side terminal 36. The other ends of the conductors 37 and 38 are supported by a support fitting 39 fixed to the main container 201 via an insulating support 40.

The other ends of the conductors 37 and 38 are connected to the grounding device ESW2, respectively.
And the fixed side elements 41B and 42B of the ESW 3 are connected, and the movable side elements 41A and 42A of these grounding devices are fixed to the main container 201 to the frame 4
It is supported by 3.

Busbar disconnector containers 203 and 204 accommodate busbar conductors BUS1 and BUS2 and disconnectors DS21 and DS22, respectively, and the busbar conductors BUS1 and BUS2 respectively include disconnectors DS21 and DS22 and through conductors of insulating spacers S1 and S2. It is connected to a branch portion provided in the middle of the conductor 37 via.

Main container 201, auxiliary container 202 and busbar disconnector container 20
All of 3,204 have an airtight structure, and SF6 gas is filled in each of these containers at a predetermined pressure.

In the above gas insulated switchgear, the grounding device ESW1
~ ESW3 is opened and the circuit breaker CB and the disconnector DS1 are closed, and the cable head CHd-the disconnector DS1-
A current-carrying circuit of the conductors 33, 34, 38-the circuit breaker CB-the conductor 37 is formed, and the bus conductors BUS1 and BUS2 are energized from the conductor 37 via the disconnectors DS21 and DS22.

In the gas-insulated switchgear of this embodiment, the present invention is applied to the mounting structure of the operation device box 3 arranged on the back side. 1 and 2 show the mounting structure of the controller box 3, and in the present invention, the intermediate plate 50 is mounted on the flange 5 of the opening 4 of the container 2. In this embodiment, the intermediate plate 50 is formed in a rectangular shape, and the intermediate plate 50 is provided with a through hole 50a through which the flange plate 6a of the mechanism case 6 can pass. A screw hole 5 into which a bolt for fixing the intermediate plate 50 to the operating device box 3 is screwed is provided around the intermediate plate 50.
0b are provided in large numbers, and a large number of bolt insertion holes 50c through which bolts for fixing the intermediate plate to the flange 5 are formed in the peripheral portion of the through hole 50a.

The intermediate plate 50 is arranged such that the peripheral portion of the through hole 50a is in contact with the flange 5, and bolts 51 inserted into the bolt insertion holes 50c, 50c, ... Are provided on the flange 5 as shown in FIG. The intermediate plate 50 is fixed to the flange 5 by being screwed into the screw holes 5a, 5a, ... After the intermediate plate 50 is attached in this way, the flange plate 6a of the mechanism case 6 is brought into contact with the flange 5 through the through hole 50a of the intermediate plate 50, and the bolt insertion holes provided in the flange plate 6a near the outer periphery thereof are inserted. The bolts 52 inserted into the holes 6b, 6b, ... Have screw holes 5b, 5b provided on the flange 5,
The mechanism case 6 is fixed to the flange 5 by being screwed into.

Brackets 53, 53 and 54, 54 are welded to the upper and lower portions of the side surface of the mechanism case 6, respectively. The operation device 10 of the ESW 1 is supported. The mechanism case 6 is provided with a disconnector-side operation force transmission mechanism that transmits an operation force to the disconnector DS1 and a grounding device-side operation force transmission mechanism that transmits an operation force to the grounding device ESW1. The input shaft 6A of the disconnecting switch side operating force transmission mechanism is provided on the upper and lower parts of the mechanism case 6, respectively.
And the input shaft 6B of the operating force transmission mechanism on the grounding device side is led out, and the operating devices 9 and 10 are connected to the brackets 53 and 5, respectively.
4, the input shafts 6A and 6B are automatically connected to the output shafts of the operating devices 9 and 10, respectively.

In the present invention, the method of connecting the operating device 9 to the input shaft 6A of the disconnecting switch side operating force transmission mechanism and the method of connecting the operating device 10 to the input shaft 6B of the grounding device side operating force transmission mechanism are arbitrary. For example, as shown in FIG. 3, the input shaft 6A of the disconnecting switch side operation force transmission mechanism and the input shaft 6B of the grounding device side operation force transmission mechanism are led out to the side surface of the mechanism case 6, and the operation devices 9 and 10 are connected. The output shafts 9A and 10A of the operating device are respectively derived from the side surface of the container, the input shaft 6A is output to the output shaft 9A of the operating device 9 via the link 55, and the input shaft 6B is output to the operating device 10 via the link 56. You may respectively connect with the shaft 10A.

In the present invention, the size of the intermediate plate 50 is set so that the operating devices 9 and 10 are located within the plate surface of the intermediate plate 50 (not to protrude from the plate surface), and the screw holes 50b of the intermediate plate 50 are formed. , 50b, ... Are the mechanical case 64 and the operating device 9, 1.
It is provided so as to be located outside 0.

The operation device box 3 is formed in a box shape having a rectangular parallelepiped shape as a whole, and a door 3B (see FIG. 4) is attached to an opening 3A on the front surface thereof. On the back plate 3a of the operation device box 3, there is provided a rectangular window portion 300 having a size capable of penetrating the operation devices 9 and 10 arranged so as to be located in the plate surface of the intermediate plate 50 and the mechanism case 6. Formed, this window 30
0 around the periphery of the intermediate plate 50 screw holes 50b, 50b, ...
Are formed to be aligned with the bolt insertion holes 301, 301, .... The operation device box 3 is arranged with the peripheral portion of the window portion 300 in contact with the peripheral portion of the intermediate plate 50, and through the bolt insertions 301, 301, ..., Screw holes 50b, 50b ,. Bolts screwed into the intermediate plate 5
It is fixed at 0.

In FIG. 3, reference numeral 57 denotes a switchboard fixed to the intermediate plate 50, and thus, in the present invention, it is not hindered to further arrange members other than the operating device on the intermediate plate.

Although the operating devices 9 and 10 are fixed to the mechanism case 6 in the above description, these operating devices may be attached to the intermediate plate. The structure of the switchgear body 1 is not limited to the example shown in FIG.

[Effects of the Invention] As described above, according to the present invention, the operator box can be attached after the mechanism case and the operator are attached, and only the operator box can be installed without removing the operator or the mechanism case. It can be removed. Therefore, there is an advantage that the work of mounting the mechanism case and the operating device, the work of adjusting the operation stroke, and the maintenance and inspection work of the operating device can be performed in an open space, and the workability of these works can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an essential part of an embodiment of the present invention, FIG. 2 is an exploded perspective view of an essential part of the embodiment, and FIG. 3 is an intermediate plate and an operating device in a gas insulated switchgear of the present invention. FIG. 4 is a front view showing an example of the positional relationship with the mechanical case and a method of connecting the operating device and the mechanical case, FIG. FIG. 3 is a cross-sectional view showing the configuration of the main part of the gas insulated switchgear of FIG. 1 ... Switchgear body, 2 ... Container, 3 ... Operator box, 4
…… Aperture, 5 …… Flange, 6 …… Mechanical case, 9,
10 ... Operation device.

Claims (1)

[Scope of utility model registration request] 1. A switchgear main body in which necessary equipment including a switch is housed in a container in which an insulating gas is sealed, and a flange of an opening provided on the side of the container and provided in the container. And a mechanism case that accommodates a mechanism for transmitting an operating force to the switch and is attached to a flange of the opening in the operator box, and is arranged in the operator box. A gas-insulated switchgear comprising an operating device for operating the switch via a mechanism inside the mechanism case, wherein an intermediate plate having a through hole of a size that allows the mechanism case to penetrate through a flange of an opening of the container. Is fixed, the mechanism case is attached to the flange of the opening through the through hole of the intermediate plate, the operation unit is disposed in the plate surface of the intermediate plate and fixed to the intermediate plate or the mechanism case, The controller box is in front A gas-insulated switchgear having a window portion having a size capable of penetrating the mechanical case and the operating device, and a peripheral portion of the window portion being coupled to the intermediate plate.