JPH10219989A - Scaffolding for assembling gas insulated electrical equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scaffolding that is structured so as to move and to be extended to suit to the width of a pressure container and can improve the assembly work of gas insulated electrical equipment and reduce working time. SOLUTION: A pair of scaffolding frames 10 are arranged on the right and left side symmetrically, and connected by an extensible fabric frame 11 and can be extended right and left. Castors 28 are attached to the lower ends of poles 22 of the scaffolding frames 10 so that the assembly may move. In addition, a dust-proof film 13 is fitted to the circumference of the assembly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffold used for assembling gas-insulated electric equipment in a substation.

[0002]

2. Description of the Related Art Conventionally, electric power generated by a power plant is transmitted at a high voltage to a substation provided around an electric power consuming area such as an industrial area or an urban area, and then converted to a low voltage at the substation. Power is supplied to consumers. Here, in constructing the substation, along with responding to social situations such as effective use of land, prevention of noise, and harmony with the surrounding environment such as appearance,
There is an active movement to construct a substation with high performance in order to improve the reliability of power equipment itself, save labor for maintenance and inspection, and improve safety and environmental resistance. Therefore,
GIS (Gas insulated substation: GAS) using sulfur hexafluoride (SF ₆ ) gas, which has excellent insulation performance, instead of the air-insulated substation that requires a large site area, which has been conventionally constructed INSULATED SUBSUTATION). In such a GIS, FIG.
As shown in (a) and (b), circuit breakers (CB), disconnectors (DS), current transformers (CT), instrument transformers (PT),
Each device constituting a substation such as a lightning arrester (LA) is housed in a grounded metal container, and pressurized SF ₆
A gas-insulated electric device 1 in which gas is sealed and hermetically sealed is laid out and installed in a complex and efficient manner on a concrete frame constructed in a site 3. And
Large electric power transmitted via a power transmission line (not shown) is received via a bushing 2 and guided to a transformer (not shown) via a gas insulated electric device 1 which is laid out in a complex manner. It is transformed to a predetermined power.

[0003] These gas-insulated electrical devices 1 are electrically connected to each other by buses in a pressure vessel in which pressurized SF ₆ gas is sealed and sealed in its internal space. The flanges are tightly connected to each other by bolt connections. In the installation work of the gas-insulated electric equipment 1, the pressure vessels of the equipment which have been separately carried in are bolted together with flanges, and the legs are fixed by welding, and then the buses in the pressure vessel are connected. The chamber is evacuated and sealed with SF ₆ gas. Since many of these operations are performed at a high place, a construction scaffold is assembled around the pressure vessel, and the work is performed from the construction scaffold. In order to prevent dust from entering the pressure vessel, the work is performed by surrounding the connection part of the pressure vessel with a dustproof curtain during the assembly work.

Next, the installation operation of the above-mentioned conventional gas-insulated electric equipment will be described with reference to FIG. FIGS. 9A and 9B are diagrams for explaining the installation operation of a conventional gas-insulated electric device. FIG. 8A is a plan view thereof, and FIG. 9B is a side view thereof. Each device constituting the gas insulated electric device 1 is assembled at a factory, a blind plate is attached, and the inside of the device is transported to the site with a clean state.
Then, each device is temporarily placed on a concrete frame, and a space for connection work is taken to approach a predetermined position. Then, the construction scaffold 4 is assembled on both sides of the adjacent equipment. Then, a dustproof curtain (not shown) is attached to the construction scaffold so as to cover the connection portion of the adjacent device. Then, the worker climbs on the construction scaffold 4, removes the blind plate of the equipment, connects the buses, and then connects the bolts at the flange portion. When this connection operation is completed, the dustproof curtain is removed, and the assembled construction scaffold 4 is dismantled. Then, as shown by the arrow in the figure, the dismantled construction scaffold 4 is moved, and the construction scaffold 4 (indicated by a dashed line in the figure) is assembled on both sides of the connection between the next adjacent devices. Perform connection work. In this way, the assembling, moving, and disassembling of the construction scaffold 4 are repeated, and when the connection between the devices constituting one unit of the gas-insulated electric device 1 is completed, the inside of the container is evacuated, and S
One unit of gas-insulated electrical equipment 1 filled with F ₆ gas
Is completed. When the installation of one unit of the gas insulated electric equipment 1 is completed, the dismantled construction scaffold 4 is moved to the installation place of the next unit,
Similarly, the installation of the gas-insulated electric device 1 is performed.

[0005] Since the height of the work scaffold of the construction scaffold 4 is fixed, the worker can move the construction scaffold in the dustproof curtain to one or two levels of the construction scaffold according to the height of the work place. The connection work is performed while shifting to the third stage.

[0006]

As described above, the installation work of the conventional gas insulated electric equipment requires repeated assembly, disassembly and movement of the dustproof curtain and the construction scaffold 4, and the height of the work scaffold. However, there is a problem that the workability is reduced because of the fixed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a structure in which a scaffold can be moved and can be expanded and contracted in accordance with the width of a pressure vessel. It is an object of the present invention to obtain a scaffold for assembling a gas-insulated electric device, which can improve the performance and shorten the working time.

[0008]

A scaffold for assembling a gas-insulated electrical device according to the present invention comprises a pair of pillars formed in a ladder-like frame by crossing a plurality of bars between a pair of pillars. And a plurality of horizontal members formed on a frame by passing a plurality of vertical members between parallel horizontal members provided at each end with a locking member to be locked to the column. The pillars are opposed to each other in the front-rear direction in parallel with each other, the locking members are locked to the respective pillars, connected by a plurality of horizontal members, and configured to be self-supporting, and installed in parallel in the left-right direction. A pair of scaffolding frames, and fitting members fitted to the struts at both ends are provided and configured to be extendable and contractable, and the fitting members are fitted to the struts facing the pair of scaffolding frames in the front-rear direction. A plurality of connecting members for connecting the pair of scaffold frames, and a front and rear of the pair of pillars forming each of the scaffold frames. A scaffold plate removably erected between the crosspieces facing each other, a dustproof curtain arranged to surround the pair of scaffold frames connected by the plurality of connecting members, and each of the pair of scaffold frames. And a moving wheel attached to the lower end of the column.

[0009] Further, the locking member and the fitting member are configured to be detachable from the column. Further, the strut is configured to be separable in the length direction. Further, the dustproof curtain is configured to be dividable in the left-right direction before and after a pair of scaffold frames connected by a plurality of connecting members. Further, an arc portion is provided at the center of the end of the dustproof film divided in the left-right direction.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIGS. 1 and 2 are a front view and a side view, respectively, showing a scaffold for assembling a gas-insulated electric device according to Embodiment 1 of the present invention. FIG.
FIG. 4 is a perspective view showing the configuration of the connecting stretchable fabric frame, FIGS. 5 (a) and 5 (b) are top and side views respectively showing the configuration of the scaffold material, and FIGS. 6 (a) and 6 (b) are It is a top view which shows an upper dust-proof film and a lower dust-proof film, respectively.

As shown in FIGS. 1 and 2, a scaffold 100 for assembling a gas-insulated electric device according to a first embodiment includes a pair of scaffold frames 10, 1 arranged in parallel in a left-right direction.
0, the upper, middle, and lower connecting elastic fabric frames 11, 11, 11 for connecting between the scaffold frames 10, 10 and the scaffolding material 12 attached to the scaffolding frame 10 are main components, and the dustproof curtain 13 is provided on the outer periphery. Used attached.

Each scaffold frame 10 has a pair of ladder-like pillars 2.
The main components are 0, 20 and a plurality of horizontal members 21 connecting between the pair of pillars 20, 20. Each of the pillars 20 is formed into a ladder-shaped frame by welding a plurality of pillars (aluminum pipes) 23 between left and right supports (aluminum pipes) 22 at regular intervals. Is formed. As shown in FIG. 3, each of the horizontal members 21 is formed by welding three vertical members (aluminum pipes) 25, 25, 25 between parallel horizontal members (aluminum pipes) 24, 24. Locking clamps 26 serving as locking members for the pillars 22 of the pillars 20 are fixed to the ends of the parallel cross members 24 formed on the transferred frame. The scaffolding frame 10 includes a pair of pillars 2.
0, 20 are opposed to each other in the front-rear direction in parallel with each other, a locking clamp 26 is fitted to each of the columns 22, and is connected by a plurality of horizontal members 21 so as to be self-standing.
Further, the scaffolding frame 10 provides a brace (aluminum pipe) 27 between the crosspieces 23 in the front-rear direction on the lower side of the pair of pillars 20, 20.
It is connected and reinforced by. Further, a caster 28 as a moving wheel is attached to the lower end of each support 22 so as to be movable. In this case, the horizontal members 21 are provided on one side of the scaffold frame 10 in the upper and lower stages, but are provided only on the upper side on the other side. The scaffolding frames 10 are connected by a connecting elastic fabric frame 11 as a connecting member, with the sides on which the horizontal members 21 are provided only in the upper stage facing each other.

As shown in FIG. 4, each connecting elastic fabric frame 11 has a pair of vertical members (aluminum pipes) 30 welded between upper and lower parallel horizontal members (aluminum pipes) 29. H-shaped structures are connected to each other by connecting rods 31 and 31 to form a frame, and an end of each parallel cross member 29 is provided with a locking clamp 32 as a fitting member for fitting to the column 22 of the pillar 20. Is fixed. Each connecting rod 31 has a flange 31
The threaded rods 31b and 31c are configured to extend from both sides of the threaded rod a, and threaded rods 31b and 31c are provided with thread grooves in opposite directions. On the other hand, each parallel cross member 29 is formed to be hollow, and has a screw hole so that it can be screwed to the screw rods 31b and 31c. The parallel parallel members 29, 29 of the pair of H-shaped structures are screwed to the threaded rods 31b, 31c of the connecting rod 31, and are configured to extend and contract by rotating the flange 31a. . The nut 33 for fixing the parallel cross member 29 and the connecting rod 31 is a screw rod 31.
b, 31c. As shown in FIGS. 5 (a) and 5 (b), the scaffolding member 12 is provided with bridge members (aluminum pipes) 35, 3 between parallel members (aluminum pipes) 34, 34.
5 and a plate (aluminum plate) 37 welded to the upper surface of the cloth 36, and the two ends of the parallel member 34 are provided at the ends of the pillar 20, respectively. A hook 37 fitted to the member 23 is fixed.

The dustproof curtain 13 includes two upper dustproof curtains 40 made of vinyl and two lower dustproof curtains 41. As shown in FIG. 6A, each upper dustproof curtain 40 is
It is formed in a rectangular shape, and mounting holes 42 are juxtaposed at its upper edge, and a Velcro (registered trademark) 43 is provided on both sides of both ends and edges of the lower inner surface.
On the other hand, as shown in FIG. 6 (b), each lower dustproof curtain 41 is formed in a rectangular shape having an arc portion 44 at the center of both side ends, and mounting holes 45 are provided side by side at the upper end edge. Further, a slit 46 is formed at the lower edge of a portion corresponding to the corner of the scaffold. Then, a magic tape 47 is provided on both side edges and an upper edge of the lower dustproof curtain 41, and a magic tape 48 is also provided around the slit 46. Each upper dustproof curtain 40 is attached to the upper side of the assembled scaffold from one side, and is tied to the crosspiece 23 and the parallel crosspiece 24 by a string 49 using a hole 42, and furthermore, the ends of each other are fixed with a magic tape. It is fixed at 43 and attached. In addition, each lower dustproof curtain 41
Is attached to the assembled scaffold from one side, is tied to the crosspiece 23 by a string 49 using a hole 45, and the upper end is fixed to the lower end of the upper dustproof curtain 40 with Velcro 43, 47. Both ends are fixed with a Velcro 47 and attached. At this time, the slit 46 is located at the corner of the scaffold. And
If the lower end of the lower dustproof curtain 41 is rolled up and fixed with the magic tape 48, the rolled up state is maintained.

Next, the installation operation of the gas-insulated electric equipment using the scaffold 100 for assembling the gas-insulated electric equipment thus constructed will be described with reference to FIG. FIG. 6 is a diagram for explaining the installation operation of the gas-insulated electric device using the scaffold for assembling the gas-insulated electric device, and FIG.
6 shows a plan view thereof, and FIG. 6B shows a side view thereof. First, a pair of pillars 20, 20 are opposed to each other in the front-rear direction in parallel with each other, and a locking clamp 26 is attached to each of the pillars 22.
Is fitted and connected by a plurality of horizontal members 21 to be self-standing.
Furthermore, the crosspieces 23 in the front-rear direction on the lower side of the pair of pillars 20, 20 are connected by braces 27, and the scaffold frame 10 is assembled. Then, the assembled scaffold frames 10 and 10 are moved by the casters 29 while being pressed, and installed so as to be opposed to the left and right sides of adjacent devices to be connected. At this time,
The pair of scaffold frames 10 and 10 are installed so that the side where the horizontal members 21 are provided only in the upper stage faces each other. Then
The nut 33 is loosened, and the flange 31a is rotated, so that the length of the connecting elastic fabric frame 11 is adjusted according to the gap between the pair of scaffold frames 10, 10. Then, the nut 33 is tightened to fix the parallel cross member 29 and the connecting rod 31. Therefore,
Locking clamp 3 on support 22 of opposite scaffold frames 10, 10
2 and the pair of scaffold frames 10 and 10 are connected. Further, the scaffold 12 is attached by fitting the hooks 37 to the crosspieces 23, 23 of each scaffold frame 10, and the scaffold 100 for assembling gas-insulated electric equipment is assembled as shown by the solid line in FIG.

Then, the worker climbs up the ladder-like pillar 20 of the scaffolding frame 10 and rises on the scaffolding plate 13, and places one upper dust-proof curtain 40 along the upper outer periphery of one scaffolding frame 10. The string 49 passing through the hole 42 of the curtain 40 is connected to the crosspiece 23 and the parallel crosspiece 24. Similarly, another upper dust curtain 4
After attaching the “0” to the other scaffolding frame 10, both ends of the two upper dustproof curtains 40 are fixed with the magic tape 43. Then, at a height position such that the pressure vessel of the device comes to the position of the arc portion 44, one lower dustproof curtain 41 is placed on one of the scaffold frames 10.
And a string 49 passing through the hole 45 of the dustproof curtain 41
And the lower end side of the upper dustproof curtain 40 and the upper end side of the lower dustproof curtain 41 are fixed with magic tapes 43 and 47. Similarly, after another lower dustproof curtain 41 is attached to the other scaffold frame 10, the lower end of the upper dustproof curtain 40 and the upper end of the lower dustproof curtain 41 are fixed with Velcro tapes 43 and 47. Then, two upper dustproof curtains 40 and two lower dustproof curtains 41 are attached so as to cover the periphery of the pair of scaffold frames 10, 10. Then, both ends are fixed with magic tape 47 so that the circumference of the pressure vessel is hermetically sealed by the arc portions 44, 44 of the two lower dustproof curtains 41, 41. Note that the lower end of the lower dust-proof film 41 is spread over the reinforced concrete body 4 in a skirt shape, and the gap between the slits 46 is eliminated by the magic tape 48.

After covering the connecting portions of the adjacent devices with the dustproof film 13 in this way, the blind plates of the devices are removed, the buses are connected, and the flange portions are bolted together. When this connection operation is completed, the fixing of the ends of the two lower dust-proof films 41, 41 by the magic tape 47 is released, the lower end of the lower dust-proof film 41 is rolled up, and the state is maintained by the magic tape 48. . At this time, if the width of the adjacent device is larger than the distance between the pair of scaffold frames 10, 10,
The fixing of the ends of the 0 and 40 with the magic tape 43 is released, and the flange 31a is rotated so that the connecting elastic cloth frame 1 is rotated.
By extending the length of one, the distance between the pair of scaffold frames 10, 10 will be adjusted. Also, a pair of scaffold frames 10, 1
In order to reduce the distance between 0, the length of the connecting elastic frame 11 may be reduced by rotating the flange 31a in the opposite direction. Then, as shown by an arrow in FIG.
Move to both sides (indicated by a dashed line in the figure) of the connection between the next adjacent devices. Therefore, two lower dust curtains 41,
The two ends are fixed with Velcro 47 so that the circumference of the pressure vessel is sealed by the arc portions 44 of 44, and the lower dustproof curtain 41 is released from rolling up at the lower end, and the connection operation is performed. Thus, the scaffold 1 for assembling the gas-insulated electric device
00, the connection between the devices constituting one unit of the gas insulated electric device 1 is completed, the inside of the container is evacuated, SF ₆ gas is filled, and one unit of the gas insulated electric device 1 is Is completed. And 1
When the installation of the gas-insulated electrical equipment 1 of the unit is completed, the scaffold 100 for assembling the gas-insulated electrical equipment is pushed to the next unit installation location and moved, and the installation of the gas-insulated electrical equipment 1 is performed in the same manner.

In addition, the worker performs the connection work in the dustproof curtain 13 while changing the mounting position of the scaffold 12 in accordance with the height of the work place.

As described above, according to the first embodiment,
Since the pair of scaffolding frames 10, 10 are connected by the connecting elastic fabric frame 11, and the casters 28 are attached to each scaffolding frame 10, the distance between the pair of scaffolding frames 10, 10 is adjusted according to the width of the device. Yes, devices can be pushed and moved without obstruction. Thus, the scaffold can be moved to the next connection between the devices without dismantling, so that the assembling workability of the gas-insulated electric device 1 can be improved and the working time can be shortened. Further, since the scaffold 12 is configured to be detachable from the crosspieces 23, 23, the mounting height of the scaffold 12 can be changed stepwise, and an appropriate scaffold height suitable for the working height can be easily obtained. And workability can be improved accordingly. In addition, since each component is configured to be detachable, transport is facilitated, and the storage space is reduced. In addition, since the dust-proof film 13 is configured to be dividable in the left-right direction at the center in the front-rear direction, when moving to the next connection portion, the device is simply separated to the left and right and the device is pushed to the next connection portion without obstruction. You can move. Further, since the arc portions 44 are provided at both ends of the lower dust-proof film 41, the gap between the lower dust-proof film 41 and the outer periphery of the cylindrical pressure vessel of each device of the gas-insulated electric device 1 is easily eliminated. be able to. Further, since each member is made of aluminum, the weight can be reduced.

Embodiment 2 In the second embodiment, each of the columns 22 constituting the pillar 20 is made of two columns.
These support members are configured to be detachable. The other configuration is the same as that of the first embodiment. According to the second embodiment, since the pedestal 20 can be vertically divided into two parts, the transportation is facilitated and the storage space is reduced.

In the first embodiment, the dust curtain 13 is used.
Are two upper dustproof curtains 40 and two lower dustproof films 41, respectively.
However, a ceiling dust-proof film that covers the ceiling may be attached. In this case, the working space can be reliably isolated from the outside, and the intrusion of dust into the pressure vessel can be further prevented. Further, in the first embodiment, the screw rod 3 having oppositely threaded threads on both sides from the flange 31a.
Although the connecting rod 31 formed by extending the 1b and 31c and the screw hole provided in the axis of the parallel cross member 29 are combined, the expanding and contracting mechanism of the connecting elastic cloth frame 11 is configured. The expansion mechanism is not limited to this, but may be any mechanism that can expand and contract the distance between the opposing parallel cross members 29, 29. In the first embodiment, the arc portions 44 are provided at both ends of the lower dust-proof film 41. However, the arc portions 44 may be omitted. In this case, the length of the lower dustproof film 41 is increased, and two lower dustproof curtains 4 are provided.
1 and 41 are attached to the outer periphery of the pressure vessel from both sides, and the mating portion of the lower dustproof films 41 and 41 is
It will be fixed with. In the first embodiment,
The fixing of the ends of the upper dust-proof film 40 and the lower dust-proof film 41 and the fixing of the lower end of the upper dust-proof film 40 and the upper end of the lower dust-proof film 41 are performed with the magic tapes 43 and 47. Is not limited to the magic tapes 43 and 47, and may be tied with a string, for example.

[0022]

Since the present invention is configured as described above, it has the following effects.

According to the present invention, a pair of pillars are provided in a ladder-like frame by arranging a plurality of crosspieces between a pair of pillars, and a pair of pillars are fixed at each end to the pillars. A plurality of vertical members are provided between the parallel horizontal members provided with the stopping members, and a plurality of horizontal members are formed on the frame body, and the pair of pillars are opposed to each other in the front-rear direction in parallel with each other. A pair of scaffolding frames which are connected to each other by a plurality of horizontal members and are capable of standing independently, and which are installed parallel to each other in the left-right direction, and fitted to the above-mentioned columns at both ends. A fitting member to be worn is provided,
And each of the scaffold frames is constituted by a plurality of connecting members that are configured to be extendable and contractable, and that fit the fitting members to the struts facing the pair of scaffold frames in the front-rear direction to connect the pair of scaffold frames. A scaffold plate removably erected between the crosspieces facing each other in the front-rear direction of the pair of pillars, and a dustproof curtain arranged to surround the pair of scaffold frames connected by the plurality of connecting members. And moving wheels attached to the lower ends of the columns of the pair of scaffold frames, so that the distance between the pair of scaffold frames can be adjusted according to the width of the device, and the device can be moved by pushing without obstruction. it can. Therefore, the scaffold for assembling gas-insulated electrical equipment can be obtained without dismantling the scaffold and moving to the connection between the next equipment, thereby improving the assembling workability of the gas-insulated electrical equipment and shortening the working time. is there.

Further, since the locking member and the fitting member are configured to be detachable from the column, the transportation is facilitated and the storage space is reduced. Also, since the struts are configured to be separable in the length direction,
This facilitates transportation and saves storage space. Further, since the dustproof curtain is configured to be able to be divided in the left-right direction before and after a pair of scaffold frames connected by a plurality of connecting members, when moving to the next connection part, the device is simply separated to the left and right. Can be pushed and moved to the next connection without obstruction. In addition, since the arc portion is provided at the center of the end of the dust-proof film divided in the left-right direction, a gap between the dust-proof film and the outer periphery of the pressure vessel of each device of the gas-insulated electric device can be easily eliminated.

[Brief description of the drawings]

FIG. 1 is a front view showing a scaffold for assembling gas-insulated electric equipment according to Embodiment 1 of the present invention.

FIG. 2 is a side view showing a scaffold for assembling a gas-insulated electric device according to Embodiment 1 of the present invention.

FIG. 3 is a perspective view showing a configuration of a transverse member in the scaffold for assembling a gas-insulated electric device according to Embodiment 1 of the present invention.

FIG. 4 is a perspective view showing a configuration of a connecting stretchable fabric frame in the scaffold for assembling gas-insulated electric equipment according to Embodiment 1 of the present invention.

FIG. 5 is a diagram showing a configuration of a scaffold material in the scaffold for assembling a gas-insulated electric device according to Embodiment 1 of the present invention.

FIG. 6 is a plan view showing a dustproof film on the scaffold for assembling a gas-insulated electric device according to Embodiment 1 of the present invention.

FIG. 7 is a diagram illustrating an installation operation of the gas-insulated electric device using the scaffold for assembling the gas-insulated electric device according to the first embodiment of the present invention.

FIG. 8 is a diagram illustrating an installation state of a gas-insulated electric device.

FIG. 9 is a view for explaining a conventional installation operation of a gas-insulated electric device.

[Explanation of symbols]

10 Scaffolding frame, 11 Connecting elastic frame (connecting member), 1
2 scaffolding material, 13 dustproof curtain, 20 pillars, 21 horizontal members, 22 columns, 23 crosspieces, 24 parallel horizontal members, 25
Vertical members, 26 locking clamps (locking members), 28 casters (moving wheels), 32 locking clamps (fitting members), 4
4 Arc part, scaffold for assembling 100 gas insulated electrical equipment.

Claims (5)

[Claims] 1. A pair of pillars formed on a ladder-like frame body with a crosspiece erected in a plurality of stages between a pair of pillars, and a locking member to be locked to the pillars at each end. A plurality of vertical members are passed between the parallel horizontal members, and a plurality of horizontal members are formed on the frame body, and the pair of pillars are opposed to each other in the front-rear direction so as to be parallel to each other. A pair of scaffolding frames that are locked by a locking member and are connected by a plurality of lateral members so as to be self-supporting, and are installed parallel to each other in the left-right direction; A plurality of connecting members provided with a mounting member, and configured to be extendable and contractable, and connecting the pair of scaffolding frames by fitting a fitting member to a support column facing the front and rear direction of the pair of scaffolding frames, A scaffold plate removably erected between crosspieces in the front-rear direction of the pair of pillars constituting each scaffold frame; A gas, comprising: a dustproof curtain disposed so as to surround the pair of scaffold frames connected by the connecting member; and a moving wheel attached to a lower end of each column of the pair of scaffold frames. Scaffold for assembling insulated electrical equipment. 2. The scaffold for assembling a gas-insulated electric device according to claim 1, wherein the locking member and the fitting member are configured to be detachable from the column. 3. The scaffold for assembling a gas-insulated electric device according to claim 1, wherein the support is configured to be separable in a length direction. 4. The dustproof curtain is configured to be dividable in the left-right direction before and after a pair of scaffold frames connected by a plurality of connecting members. The scaffold for assembling gas-insulated electrical equipment according to the above. 5. The scaffold for assembling a gas-insulated electric device according to claim 4, wherein an arc portion is provided at the center of the end of the dustproof film divided in the left-right direction.