JPH0317526Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] This invention relates to the improvement of road-mounted transformer towers that are installed on sidewalks or median strips in urban areas in order to achieve environmental harmony.

[Prior art]

Conventionally, this type of transformer tower has, for example, as shown in Fig. 3, a transformer 2 is installed in the center within the same outer box 1, a primary lead-in switch 3 is installed on the right side of the transformer 2, and a primary lead-in switch 3 is installed on the left side. Each of the secondary branch boards 4 is housed in such a way as to harmonize with the urban environment. and,
The transformer tower A, as shown in FIGS. 2 and 3,
The transformer 2 housed in the center of the outer box 1 is fixed to the base metal fitting 5 using bolts 2c via the mounting legs 2b of the case 2a, and is attached to the case 2a.
The front part (right side in FIG. 2) of the outer case 1 is constructed by integrally fixing the flange 2d, which is fixed by welding or the like, to the front plate 1a of the outer case 1 using the connecting plate 1b.
It is installed so that it cannot swing. In addition, the switch 3 located on the right side of the transformer 2 in FIG. 3 is connected to the primary side of the transformer 2 by a cable 3a, and
The switch 3 and the high voltage cable 6 are the high voltage cable 6
They are connected using a special connector attached to the side so that they can be connected and separated in one motion. The high voltage cable 6 is fixedly supported within the pit 7 by a support plate 8. Further, on the secondary side of the transformer 2, a branch board 4 is arranged between the secondary bushing 2e and the low voltage cable 9, and the secondary bushing 2e is connected to the secondary bushing 2e.
and the branch board 4, and the branch board 4 and the low voltage cable 9 are respectively connected by a switching board 10 made of a thick copper body.

In addition, in the figure, 11 and 12 are inspection doors on the primary and secondary sides of the transformer tower A, which are provided on both sides of the outer box 1;
14 is a built-in high voltage cutout with a current limiting fuse attached to the transformer 2, 15 is a radiator of the transformer 2, 16 is a canopy, and 18 is a canopy. It is a tightening bolt.

However, in the transformer tower A with the above structure,
In the event of a malfunction or periodic inspection of the transformer 2,
It was not possible to take out only the transformer 2 from the outer box 1. That is, as described above, the transformer is housed in the center of the outer box 1, and is connected to the mounting legs 2b and the base metal fittings 5.
The flange 2d and the front plate 1a are each fixed with bolts, and since these fixed parts are located in a narrow space inside the outer box 1, each door 11 for inspection and operation is closed. , 12, 13, it is not possible to insert and operate a jig such as a box up to the fixed portion.

Therefore, when repairing or replacing the transformer 2 due to a malfunction, open the inspection doors 11 and 12 on both sides of the outer box 1 and remove the high voltage cable 6, switch 3, low voltage cable 9, and branch board 4. The connection between the base metal fitting 5 and the base 17 is released, and in this state, as shown in Fig. 4, the entire transformer tower A is lifted up by a crane and moved from the installation location. As we were installing another new transformer tower,
Replacing transformer tower A is very time-consuming and troublesome, and the replacement work takes time.
There was a risk that the power outage would be extended and cause inconvenience to customers. In addition, the transformer tower A that had been moved from the installation location was transported to the factory in its original state, and the outer box 1 was once dismantled in the factory and repairs to the transformer 2 were carried out. Repairs and inspections of 2 required time and effort, and on top of that, the transformer tower itself always had to be reassembled.

[Example of idea]

This invention eliminates the above-mentioned drawbacks, and by attaching the transformer housed in the transformer tower so that it can be separated from the transformer tower, the replacement and installation work of the transformer can be done quickly and easily at the location where the transformer tower is installed. The object of the present invention is to provide a roadside transformer tower that can be installed on the road.

[Summary of the idea]

In this invention, the front plate and the rear plate forming the front and rear parts of the transformer tower outer box are divided into parts that correspond to the transformer housed in the outer box, and are placed side by side on the transformer. When inspecting or replacing the
The present invention is characterized in that only the transformer can be quickly and easily removed from the outer box for replacement at the location where the transformer tower is installed.

[Example of idea]

Embodiments of the present invention will be described below with reference to FIGS. 5 to 11.

In addition, in FIGS. 5 to 11, members that are the same as those in the prior art are designated by the same reference numerals and will be explained.

The difference between the transformer tower of this invention and the conventional transformer tower is that the transformer 2 can be separated and taken out from the outer box 21 at the installation site of the transformer tower B, as shown in FIG. It is in. In this case, transformer 2
The front and rear parts of the outer box 21 corresponding to the above are shown in FIG.
As shown in FIG. 9, it is provided so that it can be separated from the outer box 21. That is, as shown in FIG. 9, the outer box 21 has vertical openings at the front and rear portions where the transformer 2 is housed, and the edges of the openings 22 are located inside the outer box 21, as shown in FIG. A locking piece 23 is formed by bending the locking piece 23 so that its planar shape becomes a Z-shape, and a hollow vertically elongated gasket 24 is attached to the outer surface of each locking piece 23. On the other hand, the outer box 21
The opening of the transformer 2 is closed by housing the transformer 2 in the outer box 21, and the closing structure is as shown in FIGS. I'll do it. This closing plate 25,2
5a, as shown in FIG. 7, are placed in front and rear of the transformer 2 housed in the outer box 21 (top and bottom in FIG. By tightening the bolts c between the connecting plate a and the support plate b fixed to the closing plates 25 and 25a, the transformer 2
It is removably attached at regular intervals to the
Further, on the lateral edges of these closing plates 25, 25a, a gasket 24 is attached to a locking piece 23 provided on the outer box 21.
A bent piece 26 is formed into a hook shape so that the transformer 2 can be locked and connected through the outer box 21.
When the closing plate 2 is housed inside the closing plate 2 from above,
The bent piece 26 formed on the edge of the first
As shown in FIG. 1, it is joined to the locking piece 2 of the outer box 21, whereby the opening 22 of the outer box 21 is closed by the closing plates 25, 25a. Furthermore, as shown in FIG. 9, a fixing plate 27 is welded to the lower side of the transformer 2 on the side perpendicular to the closing plates 25, 25a. A fitting hole 27a into which the locking pin 28 installed on the base metal fitting 5 fits is bored.

In the figure, 29 is a ventilation hole provided above and below the closing plates 25, 25a, and 30 is the same as the closing plates 25, 25a.
Tongue pieces extending a certain length upward and downward at the upper and lower ends; 31 is the inspection door on the secondary side of transformer tower B attached to the front side of the outer box 21; 32 is the same. 1
This is the inspection door on the next side.

Next, the case of inspecting or replacing the transformer 2 will be explained.

Now, at the installation site of transformer tower B, the outer box 21
When replacing the transformer 2 housed in the tower B due to failure or maintenance inspection, open the inspection doors 31 and 32 of the transformer tower B, open the primary switch 3, and then The high voltage cable 6 connected to the secondary side and the switching plate 10 connected to the bushing 2e on the secondary side are each removed from the transformer 2. Next, transformer tower B canopy tightening bolt 18
and remove the canopy 16 from the outer box 21. Canopy 1
6, attach the hanging bolt 33 to the screw seat 19 into which the tightening bolt 18 provided on the head of the transformer 2 is screwed.
As shown in FIG. 9, the wire ropes 34 are threaded through the suspension bolts 33, and the ropes 34 are hooked to the hooks 35 of the crane. In this state, the crane is started and the transformer 2 is lifted up.
At this time, the bent pieces 26 of the closing plates 25, 25a attached to the front and rear of the transformer 2 via the connecting plate a and the supporting plate b are connected to the locking pieces 26 formed at the edge of the opening 22 of the outer box 21. Since the transformer 2 is connected to the piece 23 via the packing 24, the transformer 2 can be moved along the edge of the opening 22 of the outer box 21 without swinging back and forth or left or right of the outer box 21 using the closing plates 25, 25a as guides. As shown in FIG. 9, it can be lifted directly above the outer box 21.

In the event of a failure, the transformer 2 hoisted as described above is placed on a vehicle and transported to a factory. When only inspection is required, the inspection work will be carried out at the installation site.

After pulling out the transformer 2 from the outer box 21,
Alternatively, when storing the transformer 2 that has been inspected, the transformer 2 is stored in the outer box 21 in the reverse order of the lifting process. That is, the transformer 2 to be accommodated is once hoisted directly above the outer box 21 by a crane, and in this state is gradually lowered to be housed inside the outer box 21. In this case, the bent pieces 26 of the closing plates 25, 25a are
Since the transformer 2 slides into contact with the gasket 24 attached to the locking piece 23 of the opening 22 of the outer box 21 and serves as a guide, the transformer 2 is smoothly lowered and accommodated without swinging left and right or back and forth. When the bottom of the transformer 2 is seated on the bottom plate of the base metal fitting 5, the locking pin 28 implanted in the base metal fitting 5 is fitted into the fitting hole 28a of the fixing plate 27 provided at the bottom of the transformer 2. Therefore, the transformer 2 engages with the locking pin 28 and the fitting hole 27a of the fixing plate 27, and the bent pieces 26 of the closing plates 25, 25a engage with the locking piece 23 of the opening 22 of the outer box 21. Since the transformer 2 is joined to the outer box 21 through the packing 24, the transformer 2 can be housed in the outer box 21 without using any fixing means such as tightening bolts, so that it cannot swing. After the transformer 2 is housed, the high voltage cable 6, the switching plate 10, etc. are connected to the transformer 2 so that it can be energized, and the outer box 21
By covering the top of the transformer 2 with Tenken 16,
Conversion and inspection work will be completed.

In addition, when the transformer tower B is in operation, the closing plates 25, 25
Because outside air enters and exits through the ventilation opening 29 provided in a,
The transformer 2 and the switch 3 inside the outer box 21 are well cooled.

[Effect of idea]

Since this invention is constructed as explained above, it has the following effects.

An opening is formed vertically on the front and rear surfaces of the position where the transformer is housed in the center of the outer box of the transformer tower, while the openings are formed on the front and rear sides corresponding to the opening of the outer box of the transformer. By attaching a closing plate, the structure of the outer box of the transformer tower is such that the housing part for the transformer is made independent from the housing part for other electrical equipment in the center part, and the housing part for the transformer is made independent from the housing part for other electrical equipment. The structure is such that the transformer can be taken out separately, so when inspecting or replacing the transformer at the location where the transformer tower is installed, there is no need to replace the entire transformer tower as in the past. This is not necessary at all, and only the transformer can be lifted out of the outer box, making inspection and replacement work quick and easy.
This can be done easily, and the power outage time associated with it can be shortened as much as possible.

Further, a locking piece is formed in the opening of the outer box by bending its end edge toward the inside of the outer box so that the planar shape is approximately Z-shaped;
The side end of the closing plate attached to the transformer is integrally formed with a hook-shaped bent piece that locks and connects with the locking piece of the opening. When pulling out the transformer, the locking pieces in the opening act as a guide and the transformer can be stably inserted and removed from the top and bottom of the outer box via the front and rear closing plates. When inspecting or replacing a transformer, it is possible to lift and suspend the transformer safely, smoothly, and efficiently.

Further, a fixing plate having a fitting hole in a direction perpendicular to the closing plate is attached to the lower part of the transformer, and a base metal fitting of the outer box corresponding to this fixing plate has a fixing plate provided in the fitting hole of the fixing plate. Since a mating locking pin is installed, when the transformer is lowered into the outer box through the closing plate while being guided by the locking piece at the opening, the fixing plate of the transformer is inserted. The locking pin of the base metal fitting will automatically fit into the fitting hole,
Since the transformer can be housed and installed in the outer box so that it cannot swing without using any special fixing means such as screws, the work of housing the transformer in the outer box can be done easily. The transformer installed inside the box has a simple structure in which the locking pin is fitted into the fitting hole of the fixing plate, and the closing plate is locked and connected to the opening of the outer box. It becomes possible to store and fix the device in a box in a detachable manner.
Therefore, the installation structure of the transformer can be simplified and the assembly work can be performed efficiently, so that the manufacturing cost of the transformer tower can be efficiently reduced.

Also, when the transformer is pulled out from the outer box, the area in the outer box that accommodates the transformer becomes hollow, and
In this part, a closing plate is attached to the transformer side to close the opening of the outer box, so when the transformer is pulled out, the hollow part that was accommodated from the opening of the outer box can be used. The internal condition of the transformer, i.e., the primary service switch and secondary branch panel, can be inspected at the same time by effectively utilizing the hollow part of the transformer housing, so that inspection work can be carried out at the same time as the transformer tower installation site. This makes it possible to perform inspections of transformers and other equipment at the same time, making it possible to improve the efficiency of maintenance and inspection work for roadside transformer towers.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional road-mounted transformer tower.
Figure 2 is a vertical side view, Figure 3 is a vertical front view, and Figure 4 is a vertical side view.
The figure is a perspective view showing the state when the transformer tower is replaced, FIG. 5 is a perspective view of the transformer tower of this invention, and FIG.
The figure is a longitudinal front view, Fig. 7 is a cross-sectional plan view, Fig. 8 is a longitudinal side view, Fig. 9 is a perspective view showing the state when replacing a transformer in the transformer tower of this invention, and Fig. 10 is a FIG. 6 is an enlarged sectional view of portion P in FIG. 6, and FIG. 11 is an enlarged sectional view of portion S in FIG. 7. 2...Transformer, 21...Outer box, 22...Opening, 25, 25a...Closing plate.

Claims (1)

[Scope of utility model registration request] A road-installed transformer configured by housing a transformer 2 in the center of the same outer box 21, housing a primary lead-in switch 3 on one side of the transformer 2, and housing a secondary branch board 4 on the opposite side. In the tower, vertically elongated openings 22 are opened in the front and rear parts of the central part of the outer box 21 that accommodates the transformer, and the edges of the openings 22 are directed inward of the outer box 21. A locking piece 23 is formed by bending the outer box 2 so that its planar shape is approximately Z-shaped.
Closing plates 25, 25a for closing the opening 22 are removably attached to the front and rear parts of the transformer 2 corresponding to the opening 22 of the transformer 2.
The opening 2 is formed by bending the side ends of 5 and 25a into a hook shape.
A bent piece 26 is formed to lock and join the locking piece 23 of the transformer 2 through a packing, and the base of the outer box 21 is formed at the lower part of the transformer 2 at a position orthogonal to the closing plates 25, 25a. A fixing plate 2 having a fitting hole 27a into which a locking pin 28 installed in a metal fitting 5 is fitted.
7, and the transformer 2 is attached to the closing plates 25, 25.
A road-installable transformer tower characterized in that it is housed in and installed in an outer box 21 via a fixed plate 27 and a fixing plate 27 so as to be freely put in and taken out.