JP2010272786A - Method of disassembling and transporting transformer iron core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of disassembling and transporting a transformer iron core, capable of transportation, using a trailer by simple application applicable to weight of 45 tons or less. <P>SOLUTION: Respective main gear iron cores 1-3 are halved in the laminating direction of a metal plate, such as, a silicon steel plate configuring the cores and halved further in a direction vertical to the laminating direction to be divided into four respectively by a main gear iron core, and each of them is turned into a divided unit main gear iron core; as well as, attached lower yokes 10b-13a connected substantially orthogonal are provided on the lower part of the respective divided unit main gear iron cores 1a-3b, and an L-shaped transportation unit is attained; and the L-shaped transportation unit is stored inside a transport tank and is transported to the site by a trailer. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method of disassembling and transporting a transformer core that disassembles and transports an iron core of a large-capacity transformer.

  Along with the recent increase in power demand and higher voltage in the transmission system, the transformer used for power transmission has also increased in capacity, and a large-capacity transformer exceeding 1000 MVA has been manufactured and installed in mountainous areas where transportation conditions are severe. There has been a lot to be done. When transporting such a large-capacity transformer by a trailer, an exploded transportation method, for example, splitting the main leg cores and yokes made by laminating a plurality of metal plates, and packing each divided transport unit into a transport tank Must be transported to the installation site. As a conventional method of disassembling and transporting a transformer core, the main leg core and the yoke, which are formed by laminating a plurality of metal plates, are divided, and the main leg iron core is divided into two parts in the direction in which the metal plates extend. And this has been proposed as a transport unit (see, for example, Patent Document 1).

JP 2008-147545 A

  However, in the conventional method of disassembling and transporting transformer cores, the main leg iron core, which is the heaviest item, is divided into two parts on the dividing surface in the direction in which the metal plate extends. However, as described above, the capacity of the transformer is increased. When the capacity reaches 1500 MVA, the transport weight including transport tanks and trailers exceeds 45 tons in such transport units, and roads including traffic applications and large bridge reinforcements are required for transport by trailers. Reinforcement work is necessary, and enormous transportation costs and investigation time are required.

  An object of the present invention is to provide a method for disassembling and transporting a transformer core that can be transported using a trailer with a simple application with a weight of 45 tons or less.

  In order to achieve the above object, the present invention provides a transformer main leg iron core, an upper yoke and a lower yoke which are laminated by laminating a plurality of metal plates, which are disassembled into a plurality of parts and transported. In the disassembling and transporting method, the main leg iron core is divided into two in the stacking direction of the metal plate for each main leg iron core, and further divided into two in the direction perpendicular to the stacking direction. Each of which has a part of the lower yoke at its lower part to constitute an L-shaped transport unit, and the L-shaped transport unit is transported to an installation place in a state of being stored in a transport tank. And

  According to the method of disassembling and transporting a transformer core according to the present invention, even in the case of an ultra-large capacity transformer exceeding 1500 MVA, the transport weight at the time of disassembling and transporting can be kept within 45 tons that requires a simple application. Therefore, even when transporting an ultra-large capacity transformer to a place with severe transportation conditions, it can be easily transported with a simple application from the factory, and the use of special vehicles during transportation and reinforcement of large bridges in the transportation route The road construction including the road is not necessary, so the transportation cost can be greatly reduced. Furthermore, even in reassembly at the site, work can be performed while taking advantage of the above-described divided transportation configuration, so that it is not necessary to transport a large assembly device to the site, thereby reducing transportation costs and man-hours. it can. In addition, each main leg iron core is divided into four divided unit main leg iron cores, and each divided unit main leg iron core has an attached lower yoke connected so as to be substantially orthogonal at the lower part thereof, and has an L-shaped transport unit. Therefore, if the attached lower yoke is placed almost horizontally on the work surface or installed using an appropriate jig, the split unit main leg core can be held almost vertically and stably. Or it can be easily reassembled on site after transport.

It is a top view which shows the whole iron core which applies the decomposition | disassembly transportation method of the transformer core by one embodiment of this invention. It is a side view of the iron core shown in FIG. It is a principal part side view which shows the division | segmentation state of the iron core by the decomposition | disassembly transportation method of the transformer core by one embodiment of this invention. It is a side view which shows the packing process initial stage state of the division | segmentation unit main leg iron core shown in FIG. It is sectional drawing along the AA line of FIG. It is a side view which shows the packing process completion state of the division | segmentation unit main leg iron core shown in FIG. It is sectional drawing along the BB line of FIG. It is a top view which shows the transport state of the L-shaped transport unit shown in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a method for disassembling and transporting a transformer core according to the present invention will be described with reference to the drawings.

FIG. 1 and FIG. 2 are a plan view and a side view showing the entire iron core to which the transformer core disassembling and transporting method according to one embodiment of the present invention is applied.
As shown in FIG. 2, the entire iron core has tripod main leg iron cores 1, 2, 3 arranged side by side, and side legs 4, 5 are arranged on the sides thereof. The upper portions of the legs 4 and 5 are connected by upper yokes 6 to 9, respectively, and the lower portions of the main leg iron cores 1 to 3 and the lower portions of the side legs 4 and 5 are connected by lower yokes 10 to 13. ing. As shown by dotted lines, the main leg iron cores 1 to 3 are wound with windings 14 to 16, respectively, and these are accommodated in a transformer tank (not shown).

  The entire iron core described above is divided into a plurality of parts in consideration of disassembly and transportation. Since each of the main leg iron cores 1 to 3 has the same configuration, the main leg iron core 1 will be described as a representative here. First, as shown in FIG. 2, it divides | segments with the dividing surface 17 of the vertical direction so that it may be divided into right and left in the juxtaposition direction. The upper yokes 6 to 9 are divided at the connecting portions with the main leg iron cores 1 to 3 and the side legs 4 and 5, respectively. Further, since each of the lower yokes 10 to 13 has the same divided configuration, the lower yoke 10 will be described as a representative here. The lower yoke 10 is not connected to the side leg 4 and the main leg iron core 1 but the center of the lower yoke 10. It is divided by two dividing surfaces 18 and 19 shifted to the side.

  The entire iron core described above is further divided by a dividing surface 20, that is, a dividing surface 20 extending in the juxtaposition direction of the main leg iron cores 1 to 3, as shown in FIG. The main leg iron core 1 which is the heaviest material in the entire iron core is vertically divided by the above-described dividing surface 17 and the dividing surface 20 formed in the stacking direction of metal plates such as silicon steel plates so as to be perpendicular to the dividing surface 17. It divides over the whole direction, and is divided into four divided unit main leg cores 1a, 1b, 1c, 1d. The main leg core 2 is also divided into four divided unit main leg cores 2a, 2b, 2c, 2d at the same dividing planes 17 and 20, and the main leg core 3 is also divided at the same dividing planes 17 and 20 into divided unit main leg cores. It is divided into 4 parts 3a, 3b, 3c and 3d.

  The dividing surfaces 17 and 20 are used for dividing the transformer core for transportation. As will be described later, the divided unit main leg cores 1a to 1d are recombined to reconfigure the main leg core 1 after transportation. When the gap corresponding to the dividing surfaces 17 and 20 is positively formed with a spacer or the like in the vertical direction, the entire iron core is disposed in the transformer tank to cool the insulating oil or the like. When the medium is filled, the gap is filled with the cooling medium to form an oil passage. Therefore, the main leg iron core 1 can be more effectively cooled by the cooling medium moving through the oil passage. That is, the split surfaces 17 and 20 are formed for disassembling and transporting the transformer core while considering cooling for the main leg iron core 1. The same applies to the other main leg cores 2 and 3.

  FIG. 3 shows the main part of the entire iron core when divided by the above-described divided parts. As described above, each of the main leg iron cores 1 to 3 is divided into two in the lamination direction of a metal plate such as a silicon steel plate constituting the main leg iron core, and further divided into two in a direction perpendicular to the lamination direction. Each is divided into four parts, and each of them is a divided unit main leg iron core. What should be noted here is the lower structure of each divided unit main leg iron core. For example, the divided unit main leg iron core 1a is integrally connected to the lower lower yoke 10b which is a part of the lower yoke 10 at the lower part. As a whole, the L-shaped transport unit is used. The same applies to the divided unit main leg iron core 1b and the divided unit main leg iron core 2a, and the attached lower yokes 11a and 11b, which are part of the lower yokes 10 and 11, are integrally connected to the lower portions thereof. It constitutes a letter-shaped transport unit. The same applies to the side legs 4, and an attached lower yoke 10 a which is a part of the lower yoke 10 is integrally connected to the lower portion thereof to constitute an L-shaped transport unit. Further, although not shown in FIG. 3, the same applies to the other divided unit main leg cores 2b, 3a, 3b and the side legs 5 shown in FIG. 2, and constitutes an L-shaped transport unit. .

Next, the packaging process after dividing the entire transformer core as described above will be described.
The transformer core, winding 5 and transformer tank are packed separately and transported by trailer. The main leg iron core 1 which is the heaviest item is divided into four as described above and packed as an L-shaped transport unit. Since each L-shaped transport unit has substantially the same configuration, the L-shaped transport unit constituted by the divided unit main leg iron core 1a and the attached lower yoke 10b will be described as a representative here.

  FIG. 4 is a side view showing an initial state of packing processing of an L-shaped transport unit including a divided unit main leg iron core 1a serving as a packing unit, and FIG. 5 is a cross-sectional view taken along line AA of FIG. The division unit main leg iron core 1a and the attached lower yoke 10b are configured by laminating a plurality of metal plates such as silicon steel plates in the same direction. First, the abutment plate 21 having a shape corresponding to the uppermost metal plate is disposed on the upper surface portion in the stacking direction of the divided unit main leg cores 1a, and the uppermost portion is disposed on the upper surface portion in the stacking direction of the attached lower yoke 10b. An insulating plate 22 having a shape corresponding to the metal plate located at the position is disposed. On the other hand, a contact plate 23 having a shape corresponding to the lowermost metal plate is arranged on the lower surface portion in the stacking direction of the divided unit main leg cores 1a, and the lowermost portion on the lower surface portion in the stacking direction of the attached lower yoke 10b. An abutting plate 24 having a shape corresponding to the metal plate located at the position is arranged. A suspension fitting 25 used in a reassembly operation described later is integrally attached to an upper portion of the plate 23.

  Thereafter, as shown in FIGS. 6 and 7 showing the packing processing completion state, the portion located below the contact plate 21 disposed on the upper surface portion in the stacking direction of the divided unit main leg cores 1a and the stacking direction of the attached lower yoke 10b A lower metal fitting 26 is arranged on the upper surface side of the insulating plate 22 arranged on the upper surface portion, and the lower metal fitting 26 is coupled to the contact plate 21 using a bolt 27 and a nut 28 or the like. Thereafter, the accessory lower yoke 10b and the partial main leg iron core 1a in the middle stage of the packing process are integrally coupled by the taping 29a to 29d using the bind tape applied at a predetermined interval, thereby completing the packing process.

  Here, since the L-shaped transport unit has the divided unit main leg iron core 1a and the attached lower yoke 10b connected so as to be substantially orthogonal at the lower part thereof as described in FIG. If the yoke 10b is arranged almost horizontally on the work surface or installed using an appropriate jig, the divided unit main leg iron core 1a can be stably held almost vertically and easily, and the packing processing work can be easily performed. It can be carried out. However, in FIG. 3, the lower yokes 10 and 11 are not divided into three parts, and the divided unit main leg iron cores 1a, 1b, 2a and 2b are connected to the lower yokes 10 and 11 as in the case of the upper yokes 6 and 7. , The lower end of each divided unit main leg core 1a, 1b, 2a, 2b has a substantially V-shaped pointed shape, and it is very difficult to maintain an upright state for its packaging. It will be difficult.

FIG. 8 is a plan view showing a transport state of the L-shaped transport unit subjected to packing processing.
The L-shaped transport unit composed of the divided unit main leg iron core 1a and the attached lower yoke 10b as described above is disposed and transported in the dedicated transport tank 30 shown in FIG. Unlike the case of the packaging process, it is arranged in a substantially horizontal state in a dedicated transport tank 30. Thereafter, the L-shaped transport unit is fixed in the transport tank 30 by utilizing the space portion present in the transport tank 30. For this fixing, the transport metal fittings 31 are respectively arranged so as to form a pair on the upper surface side and the lower surface side in the stacking direction of the metal plates in the divided unit main leg core 1a and the attached lower yoke 10b, and the transport metal fittings forming these pairs. 31 are clamped by a plurality of tightening rods 32 and nuts 33 to be coupled. This fixing is not limited to the illustrated transport metal fittings 31 and 34, but can be performed using various shapes and structures, and further using an appropriate jig.

  Other parts of the entire iron core are transported in a similar packaging process. In any case, the heaviest part of the whole iron core is the main leg iron core, but as described above, each main leg iron core is divided into four parts to form L-shaped transport units, and each L-shaped transport unit is packed. Therefore, even if it is a transformer of about 1500 MVA, the transportation unit can be reduced to 45 tons or less even if the trailer and the transportation hardware are included.

After dividing and transporting as described above, the transformer is reassembled locally.
First, the transport bracket 31 and the like are removed from the transport state shown in FIG. 8 and returned to the L-shaped transport unit in the packing process completed state shown in FIG. When the packing process is completed, a wire is passed through the hanging bracket 25 that has been integrally attached, and the L-shaped transport unit is lifted using a crane. At the assembly position, the attached lower yoke 10b in the L-shaped transport unit is adjacent to the L-shaped transport unit. Then, it is inserted while being suspended so as to be combined with the lower yoke 10 to be arranged. The same operation is repeated to assemble the main leg iron cores 1 to 3 into a columnar shape by four divided unit main leg iron cores. The four divided unit main leg iron cores 1a to 1d are arranged in a columnar shape in a state where the packing process is completed, and then wound together with a bind tape to be integrated.

  Even in this reassembly work, it is handled in the state of the L-shaped transport unit in the packing processing completed state, and this L-shaped transport unit is almost orthogonal to the divided unit main leg iron core 1a as described in FIG. Therefore, when the attached lower yoke 10b is arranged almost horizontally on the work surface or is installed using an appropriate jig, the divided unit main leg iron core 1a is provided. Can be held almost vertically and stably, and reassembly work can be easily performed.

  As described above, when the main leg iron core 1 shown in FIG. 1 is reconfigured by reassembling the divided unit main leg iron cores 1a to 1d, the spacers and the like are actively provided at locations corresponding to the dividing surfaces 17 and 20. When a gap portion that is continuous in the vertical direction is formed, when the entire iron core is arranged in the transformer tank and filled with a cooling medium such as insulating oil, the gap is filled with the cooling medium to form an oil passage. The formation of the air gap portion serving as the oil passage is similarly performed in the other main leg cores 2 and 3. Such a configuration causes the movement of the cooling medium through the above-described oil passage in the operation state of the transformer in which the cooling tank is filled with the cooling medium, thereby further effectively cooling the main leg iron core. Will be able to.

  However, in the system that does not form the above-described gap that becomes the oil passage in the main leg iron core 1, the four divided unit main leg iron cores 1a are formed so that no gap is formed at positions corresponding to the dividing surfaces 17 and 20 shown in FIG. ˜1d is arranged and wound with a bind tape to be integrated. Further, as shown in FIG. 2, the side legs 4 and 5, the windings 14 to 16, and the upper yokes 6 to 9 are inserted to complete the assembly of the entire iron core.

  As described above, according to the method of disassembling and transporting a transformer core in the present embodiment, the main leg iron core, which is the heaviest item during transport of the transformer, is divided into two in the stacking direction of the metal plates such as silicon steel plates. In addition, since it is divided into two parts in the direction perpendicular to the stacking direction and each main leg core is divided into four parts for transportation, even in the case of an ultra-large capacity transformer exceeding 1500 MVA, the transportation weight during disassembly transportation is simplified. It can be kept within 45 tons that can be applied. Therefore, even when transporting an ultra-large capacity transformer to a place with severe transportation conditions, it can be easily transported with a simple application from the factory, and the use of special vehicles during transportation and reinforcement of large bridges in the transportation route The road construction including the road is not necessary, so the transportation cost can be greatly reduced. Furthermore, even in reassembly at the site, work can be performed while taking advantage of the above-described divided transportation configuration, so that it is not necessary to transport a large assembly device to the site, thereby reducing transportation costs and man-hours. it can.

  In addition, according to the method of disassembling and transporting the transformer core in the present embodiment, the divided unit main leg iron core is divided into four for each main leg iron, and each divided unit main leg iron core, for example, the divided unit main leg iron core 1a. Has an L-shaped transport unit having an attached lower yoke 10b connected substantially orthogonally at the lower portion thereof, so that the attached lower yoke 10b is arranged substantially horizontally on the work surface or an appropriate jig. Can be used to stably hold the split unit main leg iron core 1a almost vertically, and the packaging process work and the reassembly work can be easily performed on site after transportation.

  The method of disassembling and transporting a transformer core according to the present invention is not limited to the iron core structure shown in FIGS. 1 and 2 and can be applied to other configurations.

1-3 Main leg cores 1a-1d Split unit main leg cores 2a-2d Split unit main leg cores 3a-3d Split unit main leg cores 4,5 Side legs 6-9 Upper yoke 10-13 Lower yoke 10a, 10b Attached below Yoke 14-16 Winding 17-20 Dividing surface 21 Contact plate 22 Insulating plate 23, 24 Contact plate 25 Suspension bracket 26 Bottom clamp 27 Bolt 28 Nut 29a-29d Binding tape 30 Transport tank 31 Transport bracket 31 Tightening rod 33 Nut 34 Transport bracket

Claims (1)

  In a transformer core disassembling and transporting method in which a plurality of metal plates are stacked to constitute a transformer main leg iron core, an upper yoke and a lower yoke, and these are disassembled and transported, the main leg iron core is Each main leg iron core is divided into two in the stacking direction of the metal plates, and further divided into two in the direction perpendicular to the stacking direction. A method of disassembling and transporting a transformer core, comprising an L-shaped transport unit having a portion, and transporting the L-shaped transport unit to an installation site in a state of being stored in a transport tank.

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