JPH065429A - Disassembled-transportation type transformer - Google Patents

Abstract

PURPOSE:To reduce significantly the weight at the time of transportation of a disassembled-transportation type transformer and the size at the time of transportation of the transformer as well as to make it possible to conduct easily the on-site assembly of the transformer and the installation work for the transformer in a short time and to improve the dielectric reliability of the transformer. CONSTITUTION:A disassembled-transportation type transformer is disassembled into an E-shaped split core 5, which consists of a lower yoke 1 excluding an upper yoke split into a plurality of pieces in the laminating direction and legs 2, 3 and 4, the upper yoke and windings, the core 5, the upper yoke and the windings are housed in separate transport tanks, are transported, the E-shaped split core 5, which consists of the lower yoke 1 split into a plurality of pieces in the laminating direction and the legs 2, 3 and 4, is integrally assembled on the field and after the windings are inserted, the upper yoke is packed into the core 5 to assemble the transformer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron core disassembling and transporting structure for a disassembling and transporting type transformer.

[0002]

2. Description of the Related Art As the demand for electric power has increased, the capacity of power transmission and distribution transformers has also increased, and due to restrictions on transportation conditions, it is required to greatly reduce the weight and size during transportation. Conventionally, in the case of a large capacity, for example, a 400 MVA class three-phase transformer, it is configured as three single-phase transformers and transported separately, and each single-phase transformer is connected locally by a three-phase batch tank or duct. There is a split transportation method in which three-phase wiring is used to make a three-phase transformer. In addition, there is a disassembled transportation method in which a transformer assembled at the factory is divided into parts such as iron core legs, upper and lower yokes, windings, and split tanks for transportation, and these are reassembled locally.

[0003]

However, in the case of the division transportation method, it is difficult to transport to a mountainous area where the transportation conditions are severe, and in the case of the division transportation method, the transportation is easy, but Re-assembling takes a long time, and during this period, the winding insulation material is exposed to the atmosphere, which lowers the reliability of the insulation and requires a local re-drying process to prevent this. In the on-site reassembly process of the disassembled transportation type transformer, the most time-consuming work is packing the upper yoke of the iron core.

The present invention has been made in view of the above points. The transport weight and the transport size are significantly reduced, and the on-site assembly and installation work can be easily performed in a short time, and the insulation reliability is improved. It aims at providing the transformer which improved.

[0005]

In the disassembling and transporting type transformer of the present invention, an E-shaped iron core composed of a lower yoke and legs that are divided into a plurality of pieces in the stacking direction is divided into a plurality of divided cores in the stacking direction. The upper yoke and the winding are disassembled.

[0006]

With this construction, the upper yoke and the winding of the iron core are removed during transportation, and the E-shaped iron core composed of the lower yoke and the legs divided into a plurality in the stacking direction, the upper yoke, and the winding. They are stored in separate transport tanks and transported, and an E-shaped iron core consisting of a lower yoke and legs is assembled on site, windings are inserted, and then an upper yoke is packed to assemble the transformer contents.

Therefore, the iron core, which is the largest weight of the transformer parts, is disassembled from the upper yoke, and the E-shaped iron core consisting of the lower yoke and legs of the iron core is divided into a plurality of pieces in the stacking direction. Since it is transported as a whole, the transport weight is significantly reduced,
During the on-site installation, iron core assembly, winding insertion, and upper yoke filling work are easily performed, which facilitates on-site installation work and increases insulation reliability.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing an E-shaped iron core consisting of a lower yoke and legs that are divided into a plurality of parts in the stacking direction of an embodiment of the disassembled transport type transformer of the present invention. In FIG. Reference numerals 2 and 3 are outer legs, and 4 is a middle leg. These lower yoke 1, outer legs 2, 3 and middle leg 4 constitute an E-shaped iron core 5, which is fastened and fixed by an upper clamp 6 and a lower clamp 7 for transportation. It is stored in the transportation tank 8. Incidentally, 9 is a binding for fastening the lower yoke 1.

FIG. 2 is a side view showing split iron cores 5A, 5B obtained by dividing an E-shaped iron core 5 consisting of a lower yoke and legs into a plurality of layers in the stacking direction, which is an embodiment of the disassembled transport type transformer of the present invention. In FIG. 2, the E-shaped iron core 5 is a split iron core 5A.
And 5B, each of which is clamped and fixed by an upper clamp 6 and a lower clamp 7 for transportation, respectively, and separately stored in separate transportation tanks 8, 8. Here, the case where it is divided into two is shown, but it may be divided into three or more.

FIG. 3 is a schematic diagram showing a transportation state of the V-cut upper yoke of the embodiment of the split transportation type transformer of the present invention.
Upper yoke 10 removed after assembly and testing of the transformer at
(Inserted in the E-shaped iron core 5 at the time of on-site assembly) is housed inside the transportation tank 11.

FIG. 4 is a sketch showing the winding transportation state of an embodiment of the disassembled transportation type transformer of the present invention. In FIG. 4, the winding 12 removed after the transformer is assembled and tested is a flexible airtight sheet 13. It is sealed by and is stored inside the transportation tank 14.

In this way, the E-shaped iron cores 5A, 5B separately stored in the transportation tanks 8, 8 and the transportation tank 1
Upper yoke 10 and transport tank 1 housed inside 1
Windings 12, 12, 1 housed inside 4, 14, 14
Disassemble into 2, transport to the site and reassemble.

FIG. 5 is a side sectional view of an essential part showing the assembled state of the iron core of the embodiment of the disassembled transportation type transformer of the present invention. In FIG. 5, the inside of the on-site assembly chamber 16 is dustproof and dampproofed by the dustproof and dampproof device 15. Inside the on-site assembly room 16, iron cores 5A and 5B
To form the E-shaped iron core 5. In addition, 17 is a lower tank.

FIG. 6 is a front cross-sectional view of a main part of the disassembled transport type transformer according to the present invention showing a state in which windings are inserted. In FIG. 6, as in FIG. The inside is dustproof and moistureproof, and the windings 12, 12, 12 are inserted into the outer legs 2, 3 and the middle leg 4 inside the field assembly chamber 16. In addition, 17 is a lower tank.

FIG. 7 is a front sectional view of an essential part showing a state in which the upper yoke of the disassembled transport type transformer of the present invention is inserted, and in FIG. The inside is dustproof and moistureproof, and the upper yoke 10 is packed inside the on-site assembly chamber 16. In addition, 17 is a lower tank.

FIG. 8 is a front view showing a state after assembly of the embodiment of the disassembled transport type transformer of the present invention, and FIG. 9 is a side view thereof. In FIGS. 8 and 9, the lower tank 17 is covered with the upper tank 18. Configure the transformer 19.

[0018]

As described above, the E-shaped iron core 5 composed of the lower yoke and the legs is divided into a plurality of pieces in the stacking direction, and these are individually clamped and fixed by the upper clamp 6 and the lower clamp 7 for transportation. The upper yoke 10 that is housed inside the transportation tanks 8 and is joined in a stepwise manner is the transportation tank 1.
1, and the winding 12 is sealed by a flexible airtight sheet 13 and stored in a transportation tank 14 for transportation. The E-shaped iron core 5 and the upper yoke 10 and the windings 12, 12, 12 are combined in a field assembly chamber 16 in which the inside is dust-proof and moisture-proof by a dust-proof and moisture-proof device 15 to combine the E-shaped iron cores 5A and 5B. The E-shaped iron core 5 is constructed, and then the windings 12, 12, 12 are inserted into the outer legs 2, 3 and the middle leg 4,
Further, the upper yoke 10 is packed, and finally the lower tank 17 is covered with the upper tank 18 so that the transformer 19 is reassembled. (1) The core material cost is the same as that of a normal three-phase core.

(2) Disassembled transportation enables truck transportation.

(3) There is no influence of zero-phase voltage as compared with the case where the three-phase five-leg iron core is divided.

(4) The space factor of the iron core is good.

(5) Since the upper yoke is V-cut and has a step-like bonded iron core, workability is good and each characteristic is also good.

Excellent effects such as the above can be obtained.

[Brief description of drawings]

FIG. 1 is a front view showing an E-shaped iron core composed of a lower yoke and legs that are divided into a plurality of pieces in the stacking direction of an embodiment of a disassembled transport type transformer of the present invention.

FIG. 2 is a side view showing an E-shaped split iron core composed of a plurality of lower yokes and legs that are split in the stacking direction in an embodiment of the disassembled transport type transformer of the present invention.

FIG. 3 is a schematic diagram showing a transportation state of an upper yoke of an embodiment of the disassembled transportation type transformer of the present invention.

FIG. 4 is a schematic view showing a transportation state of windings of an embodiment of the disassembled transportation type transformer of the present invention.

FIG. 5 is a side sectional view of an essential part showing an assembled state of the E-shaped iron core of the embodiment of the disassembled transport type transformer of the present invention.

FIG. 6 is a front sectional view of an essential part showing a state in which windings are inserted in an embodiment of the disassembled transport type transformer of the present invention.

FIG. 7 is a front sectional view of an essential part showing a state in which an upper yoke is inserted in an embodiment of the disassembled transport type transformer of the present invention.

FIG. 8 is a front view showing a state after assembly of an embodiment of the disassembled transportation type transformer of the present invention.

FIG. 9 is a side view showing a state after assembly of the embodiment of the disassembled transportation type transformer of the present invention.

[Explanation of symbols]

 1 ... Lower yoke 2, 3 ... Outer leg 4 ... Middle leg 5 ... E-shaped iron core 5A, 5B ... E-shaped split iron core 6 ... Upper clamp 7 ... Lower clamp 8 ... Iron core transport tank 9 ... For lower yoke tightening Bind 10 ... Upper yoke 11 ... Upper yoke transport tank 12 ... Winding 13 ... Flexible airtight sheet 14 ... Winding transport tank 15 ... Dust-proof / moisture-proof device 16 ... On-site assembly room 17 ... Lower tank 18 ... Upper tank 19 ... Transformer

Claims (1)

[Claims] 1. An E-shaped iron core composed of a lower yoke and legs, which is divided into a plurality of pieces in the stacking direction, an upper yoke, and windings, which are then disassembled into separate transport tanks for transportation. Disassembling and transporting type transformer.