JPH08236357A - Disassembly and transportation Transformer transportation and assembly method - Google Patents

Abstract

(57) [Abstract] [Purpose] In a disassembling transportation transformer, the winding work connected to the winding and other predetermined components are integrated and transported to the installation site for transportation work or reassembly. Provided is a method for transporting and assembling a disassembling transport transformer that improves work efficiency. [Structure] The winding surface of the winding wire 1 is protected by an insulating cylinder 2, and both end surfaces in the axial direction of the winding wire 1 have a pair of tightening plates 3a, 3
It is concluded at b. A pair of intermediate supports 4a and 4b are provided on the surfaces of the pair of tightening plates 3a and 3b, respectively. The periphery of the connection lead 5 raised from the winding wire 1 is protected by a barrier insulating structure 6, and the connection lead 5 and the barrier insulating structure 6 are fixed to a supporting column 7, with the supporting column 7 and the intermediate supports 4a, 4b interposed therebetween. Then, the transportation unit is supported and fixed to the tightening plates 3a and 3b and integrated with the winding 1, and the entire outer surface of the transportation unit is sealed with the moisture-proof film 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transporting and assembling a disassembled transport transformer, in which a transformer is disassembled into a plurality of transport units and transported to an installation site, and the transformer is reassembled at the installation site. In particular, the present invention relates to a method of transporting and assembling a disassembling transport transformer that improves the efficiency of assembly work at an installation site by transporting the winding and its attached portion while being connected.

[0002]

2. Description of the Related Art A transformer is of various types including an iron core and windings that form the body of the contents, a transformer tank that houses the body of the contents, and a winding attachment part that is electrically connected to the windings. It is made up of components, which are assembled and connected to one another in a manufacturing plant. The transformer manufactured in this way is transported to the installation site after being subjected to various characteristic tests and drying treatments, and is installed according to the scale of the transformer and various transport conditions. different.

For example, a small-capacity transformer is usually transported to an installation site after being completely assembled in a factory and then assembled with all the components except specific parts having a transportation obstacle. . On the other hand, with the increase in power demand,
In the case of large-capacity transformers used in high-voltage power transmission systems that have become widespread in recent years, the size and weight of the transformers become extremely large. The need arises. Particularly in high-voltage power transmission systems, transformers are often installed in mountainous areas as the length of distribution lines increases, and in this case, transportation restrictions become more stringent. Significant reduction in transport weight is of particular importance.

As a measure against such a restriction on transportation,
Conventionally, in the case of a transformer for power transmission and distribution installed in a mountainous area, the main body of the three-phase transformer and the transformer tank are divided and transported for each phase unit, and each phase unit transformer is transported. The method of integrating at the installation site is adopted. However, even if a large-capacity transformer of 300 MVA or more is divided into each phase using this method, the transport weight of each phase can be reduced to about 50 tons at most due to problems of assembly space and economy. It is not possible to expect a significant reduction in transportation scale and weight required for installation in mountainous areas.

Therefore, in order to further reduce the scale and weight of transportation, a disassembling transportation method is adopted. In this method, a large-capacity three-phase transformer that was once manufactured in a factory and has already been tested is disassembled into individual components such as the iron core, windings, and upper and lower yokes, and these are stored in dedicated transport tanks. It is transported to the installation site and reassembled at the installation site. A transformer transported using such a disassembling transportation method is called a disassembling transportation transformer.

Conventionally, in the disassembling and transporting transformer, the winding-attached portion connected to the winding at the time of transportation is disassembled and stored in a dedicated transport tank different from the winding and transported to the installation site. . As such a winding attachment part, a connection lead wire which is raised to the high voltage terminal side of the winding in a non-voltage tap changer or a high voltage transformer of 500 KV class and whose periphery is protected by a barrier insulation structure. and so on.

These winding appendages had to be reattached to the winding at the installation site, supported and fixed from the winding side and assembled. For example, in the case of a non-voltage tap changer, after being supported and fixed to the winding at the installation site, it was further connected to the winding through a predetermined tap lead. Further, in the case of the connection lead wire, after the connection lead wire and the barrier insulating structure were assembled at the installation site, they were supported and fixed to the winding.

The barrier insulating structure for insulating and protecting the periphery of the connecting lead wire is mainly composed of a pressboard molded product, has a very high hygroscopic property, and has a characteristic that the insulating property is remarkably deteriorated by moisture in the atmosphere. is there. Therefore, conventionally, a drying process is performed at the time of manufacturing the disassembling and transporting transformer to maintain the insulation characteristics of the barrier insulating structure.

[0009]

However, the above disassembling and transporting system has the following problems. First, in the disassembling transportation method, since it is necessary to provide a dedicated transport tank for each winding-attached portion to be transported, it takes time to carry in and transport the winding-attached portion.

Next, since the very complicated work contents for attaching the above-mentioned winding attached portion to the winding are all performed at the installation site, a long time is spent on the reassembly work. In particular, when supporting and fixing the connection lead wire and the barrier insulating structure to the winding, if the time for which the barrier insulating structure is exposed to the atmosphere becomes long due to the troublesome installation work at the installation site, as described above, Moisture absorption of the insulation structure progresses rapidly and its insulation characteristics deteriorate. In the past, it was difficult to prevent moisture absorption of the barrier insulation structure during the reassembly work, and therefore, it was necessary to perform additional drying treatment at the installation site to enhance the insulation characteristics of the barrier insulation structure again. .

As described above, in the conventional disassembly and transportation system, not only a great deal of labor and time are required in the transportation work and the reassembly work at the installation site, but also the characteristics of the barrier insulation structure resulting from this. In order to prevent the deterioration, a new work of drying treatment was added at the installation site, which was not efficient.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to disassemble a winding accessory portion connected to a winding in a disassembled transport transformer. It is an object of the present invention to provide a method of transporting and assembling a disassembling transport transformer that improves the efficiency of transporting work or reassembling work by fixing them to the installation place and transporting them integrally to the installation place.

More specifically, the first object of the present invention is to simplify the transportation work and the reassembly work at the installation site by fixing the winding attachment part to the winding side and transporting it to the installation site. That is.

A second object of the present invention is to simplify the transport work by securely connecting and fixing the winding and the winding-attached portion with a simpler structure and integrating them.

A third object of the present invention is to simplify the transportation work and the reassembly work at the installation site by fixing the winding attachment part in the transformer tank and transporting it to the installation site.

[0016]

In order to solve the above problems in the prior art, the invention according to claim 1
A transformer consisting of multiple components, including a transformer tank, iron core, windings, and winding attachments connected to the windings, is disassembled into multiple transport units and transported to the installation site, where the transformer is installed. In the method for transporting and assembling the disassembling and transporting transformer, the winding surface of the winding is supported and protected by insulating members, and both axial end surfaces of the winding are supported and protected by a pair of supporting members. By supporting / fixing the winding-attached portion to the winding in a state where the winding-attached portion is connected to the winding, the winding and the winding-attached portion are configured as an integral winding transport unit. The entire outer surface of the winding transport unit is hermetically sealed with a film moistureproof material, and the winding transport unit is housed in one transport tank for hermetic transport.

According to a second aspect of the present invention, in the method of transporting and assembling the disassembling and transporting transformer according to the first aspect, a column along the vertical direction of the winding is provided around the winding, and the column is provided with the column. The winding-attached portion connected to the winding is attached and supported / fixed, and both ends of the column are connected to the pair of supporting members, respectively.

According to a third aspect of the present invention, in the method for transporting and assembling the disassembling / transporting transformer according to the second aspect, a pair of intermediate support members are mounted on the surfaces of the pair of support members, respectively, and the pair of intermediate support members are attached. Both ends of the column are fixed to the pair of support members by members.

According to a fourth aspect of the present invention, in the method of transporting and assembling the disassembling and transporting transformer according to any one of the first to third aspects, the winding accessory part is connected to the winding. And a lead wire and an insulating structure provided around the lead wire to insulate the lead wire.

According to a fifth aspect of the present invention, in the method for transporting and assembling the disassembling and transporting transformer according to any one of the first to fourth aspects, the winding attached portion is wound by a predetermined tap lead. It is a non-voltage tap changer connected to the line.

According to the invention of claim 6, a transformer tank,
Disassemble a transformer consisting of multiple components including an iron core, windings, and winding attached parts connected to the windings into multiple transport units, transport them to the installation site, and assemble the transformer at this installation site. In the method of transporting and assembling the disassembled transport transformer, the winding attachment part is fixed and stored in the transformer tank at the specified position, and the winding attachment part and the transformer tank are transferred to the installation place as an integral transport unit. Characterized by transportation.

[0022]

The operation of the present invention having the above construction is as follows. First, in the invention according to claim 1, since the winding and the attached portion connected to the winding are integrated as a winding transportation unit, the number of transportation tanks and transportation are increased as compared with the case where each winding attached portion is transported separately. The number of times can be reduced. Further, since the assembly work of the winding wire and each winding accessory portion is completed for each winding transport unit, it is possible to save the time spent for fixing and connecting the winding wire and each winding accessory portion at the installation site. .

According to the first aspect of the invention, the film moistureproof material can hold the winding transport unit without exposing it to the atmosphere until the final stage of the assembly work at the installation site.
Therefore, functional reliability can be ensured for each winding transport unit.

According to the second aspect of the present invention, the column provided around the winding in the axial direction of the winding supports and fixes the attached portion. Since this support column is connected to a pair of support members that support and fix both axial end faces of the winding, the accessory portion can be reliably fixed to the winding side via the support column.

In the invention according to claim 3, a pair of intermediate support members mounted on the surfaces of the pair of support members connect the column and the pair of support members. For this reason, the work of fixing the attached portion and the winding becomes easier, and the size of the winding transport unit can be minimized.

According to a fourth aspect of the present invention, the winding place, the lead wire connected to the winding wire, and the insulating structure of the lead wire provided around the lead wire are integrated and installed in an integrated manner. Therefore, it is possible to save the trouble of supporting and fixing the lead wire and the insulating structure to the winding at the installation site. Further, since the film moistureproof material prevents the insulating structure from coming into contact with the atmosphere, the amount of moisture absorbed by the insulating structure from the atmosphere can be minimized. Therefore, it is possible to omit or simplify the drying process which has conventionally been additionally performed on the insulating structure at the installation place.

According to the fifth aspect of the invention, in particular, the winding and the non-voltage tap changer connected to the winding can be transported to the installation place in an integrated state by connecting them in advance with tap leads. It is possible to save the trouble of supporting and fixing the voltageless tap changer to the winding at a place.

According to the sixth aspect of the present invention, the transformer tank is also used as the transport tank for transporting the winding accessory part. For this reason, it is not necessary to provide a dedicated transport tank when transporting the winding-attached portion, and the complexity of transport work is alleviated.

[0029]

【Example】

(1) First Example An example to which the present invention is applied will be described below with reference to the drawings. The present invention is characterized in that a winding accessory portion connected to this winding is fixed to a winding that is a constituent portion of the transformer main body, and is integrated as a winding transport unit. The first embodiment, which will be described in detail below, is an example in which the winding attachment portion is a connection lead drawn from the winding and an insulating structure for the connection lead.

FIG. 1 shows the structure of a winding transport unit in which a winding, a connecting lead and a barrier insulating structure are integrated.
In FIG. 1, the winding surface of the winding wire 1 is an insulating cylinder (insulating member) 2
The winding 1 is insulated and protected by both ends of the winding 1 in the axial direction and fastened by a pair of tightening plates (supporting members) 3a and 3b. A pair of intermediate supports (intermediate support members) 4a and 4b are provided at predetermined locations on the surfaces of the pair of tightening plates 3a and 3b, respectively. A connection lead (attachment part to the winding) 5 is raised from the upper end of the winding 1 on the high voltage line side, and the periphery of the connection lead 5 is covered with a barrier insulating structure 6 for insulation protection.

The connection lead 5 and the barrier insulating structure 6 are supported and fixed by a mounting strut 7 which is provided in the axial direction of the winding 1. The upper end 7a and the lower end 7b of the mounting column 7 are supported and fixed to the pair of tightening plates 3a and 3b via the pair of intermediate supports 4a and 4b, respectively. That is, between the tightening plate 3a and the intermediate support 4a, between the intermediate support 4a and the upper end 7a of the mounting column 7, between the tightening plate 3b and the intermediate support 4b, and between the intermediate support 4b and the mounting column 7. The lower end 7b is fastened by four insulating bolts 8a to 8d, respectively.

In this way, the connection lead 5 and the barrier insulating structure 6 are integrated with the winding 1 side to constitute one winding transport unit. Further, the entire outer surface of the winding transport unit is sealed and sealed with an oil-resistant moisture-proof film (film-shaped moisture-proof material) 9 and stored in a dedicated transport tank (not shown).

In the first embodiment having the above-mentioned structure, the winding 1, the connecting lead 5 which is the accessory portion thereof, and the barrier insulating structure 6 of the connecting lead 5 are installed as one winding transport unit in the installation place. Be transported to. That is, since it is not necessary to provide another transport tank for the connection lead 5 and the barrier insulating structure 6, the number of transport tanks used can be reduced. As a result, the work of loading and transporting the winding 1, the connecting lead 5, and the barrier insulating structure 6 into the transport tank is reduced, and the transport work to the installation location can be performed efficiently.

In the winding transport unit, the connecting lead 5 and its barrier insulating structure 6 are connected to the winding 1.
The work of supporting and fixing from the side has been completed. Therefore, the reassembly work at the installation site of the transformer can be simplified, and the overall work time can be shortened.

Further, as described above, since the assembly work has already been completed inside the winding transport unit, the moisture-proof film 9 covering the outer surface of the winding transport unit is used until the final step of the reassembly work. It is left as it is. Then, after the reassembly work is completed and the transformer tank is covered and the winding transport unit is shielded from the outside air, it is removed from the surface of the winding transport unit for the first time. Therefore, the time during which the insulating cylinder 2 of the winding 1 and the barrier insulating structure 6 of the connecting lead 5 are exposed to the atmosphere can be minimized, and moisture absorption of the insulating member can be easily prevented. As a result, the deterioration of the characteristics of the barrier insulating structure can be suppressed, so that the drying process for the barrier insulating structure which has been conventionally required at the installation place can be omitted or significantly simplified. Therefore, the reassembly work at the installation site can be performed efficiently in a shorter time.

(2) Second Embodiment A second embodiment to which the present invention is applied will be described below with reference to FIG. In the second embodiment, the winding attachment part of the present invention is
This is an example in the case of a non-voltage tap changer. Also, FIG.
Represents a configuration of a transport unit in which the winding and the voltageless tap changer are integrated. In the following description, the same members as those described in the first embodiment will be designated by the same reference numerals.

In FIG. 2, the winding surface of the winding wire 1 is the insulating cylinder 2.
And the both end surfaces of the winding 1 in the axial direction are fastened by a pair of tightening plates 3a and 3b. Further, a pair of intermediate supports 4a and 4b are provided at predetermined positions on the surfaces of the pair of tightening plates 3a and 3b, respectively.

In this second embodiment, the non-voltage tap changer 10 is supported and fixed to the mounting column 7. Then, the non-voltage tap changer 6 includes insulating bolts 8a to 8a.
By 8d, it is fixed to the pair of tightening plates 3a and 3b via the mounting column 7 and the pair of intermediate supports 4a and 4b, respectively. Further, a predetermined tap lead 11 is provided between the winding 1 and the voltageless tap changer 10.
Connected by

In this way, a winding transport unit in which the voltageless tap changer 10 is integrated with the winding 1 side is formed, and the entire outer surface of the winding transport unit is oil-proof and moisture-proof. The film 9 is sealed and sealed with a film 9 and stored in a dedicated transport tank (not shown).

In the second embodiment having the above-mentioned structure, since the winding 1 and the non-voltage tap changer 10 are integrated into one winding transport unit, the non-voltage tap changer 10 is used. Since it is not necessary to provide a separate transportation tank for each, the transportation work can be simplified. At the installation location, the work of supporting and fixing the non-voltage tap changer 10 from the winding 1 side and the work of connecting the winding 1 and the non-voltage tap changer 10 with the tap lead 11 are omitted. Therefore, the reassembly work can be easily performed in a short time.

(3) Other Embodiments The present invention is not limited to the above-mentioned two embodiments but can be widely applied while appropriately changing the mode. For example, in the first embodiment, the connection lead 5
Is raised from the upper end of the winding 1 on the high voltage line side, but may be raised from the lower end of the winding 1 on the high voltage line side. In addition, as long as the transportation scale and the weight limit are not exceeded, in the first and second embodiments, the connection lead 5 and the barrier insulating structure 6 are provided as an additional portion fixed to the winding 1.
Needless to say, it is possible to support and fix the attached parts other than the non-voltage tap changer 10 for transportation.

Further, as an example in which the present invention is applied to a wider range, the winding attachment portion of the voltageless tap changer or the like is fixed not at the winding but at a predetermined position in the transformer tank. Can also be transported together with this transformer tank to the installation site. In this method, since the transformer tank also serves as the transportation tank, the work content in transportation and reassembly can be reduced to some extent. However, when transporting the winding accessory by this method, it is necessary to carry out a connecting work between the winding accessory and the winding at the installation site.

[0043]

As described above, according to the present invention, the winding attachment part of the disassembling and transporting transformer is transported to the installation site in a state where it is connected and fixed in advance to the predetermined constituent parts in the transformer. Thus, it is possible to provide a method of transporting / assembling a disassembling transport transformer that simplifies transport work and reassembly work at an installation site and improves efficiency. Also, at this time,
It is economical because the number of transportation tanks required for transportation work can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a winding transport unit in which a winding, a connecting lead and a barrier insulating structure are integrated in a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a winding transport unit in which a winding and a voltageless tap changer are integrated in a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Winding 2 ... Insulation cylinder 3a, 3b ... Tightening plate 4a, 4b ... Intermediate support 5 ... Connection lead 6 ... Barrier insulation structure 7 ... Mounting column 8a-8b ... Insulation bolt 9 ... Moisture-proof film 10 ... No-voltage tap switching Vessel 11 ... Tap lead

Claims (6)

[Claims] 1. A transformer comprising a plurality of constituent parts including a transformer tank, an iron core, a winding, and a winding attached portion connected to the winding is disassembled into a plurality of transportation units and transported to an installation site. In the method of transporting and assembling a transformer, the transformer is assembled at the installation site, the winding surface of the winding is supported and protected by an insulating member, and both axial ends of the winding are supported by a pair of supporting members. Supporting and protecting, and supporting / fixing the winding attached part to the winding with the winding connected to the winding, the winding and the winding attached part are configured as an integrated winding transport unit. Then, the entire outer surface of the integrated winding transport unit is sealed with a film moisture-proof material, and the winding transport unit is housed in one transport tank and sealed and transported. Transportation and assembly method. 2. A pillar is provided around the winding in the axial direction of the winding, and the winding accessory part connected to the winding is attached to the pillar to support and fix the winding.
2. The method for transporting and assembling a disassembling transport transformer according to claim 1, wherein both ends of the column are connected to the pair of support members, respectively. 3. A pair of intermediate support members are respectively mounted on the surfaces of the pair of support members, and both ends of the column are fixed to the pair of support members by the pair of intermediate support members. Item 2. A method for transporting and assembling the disassembling transport transformer according to Item 2. 4. The winding attachment part has a lead wire connected to the winding and an insulating structure provided around the lead wire to insulate the lead wire from the lead wire. The method for transporting and assembling the disassembling transport transformer according to claim 3. 5. The winding-attached portion is a voltageless tap changer connected to the winding by a predetermined tap lead, according to any one of claims 1 to 4. Transport and assembly method for disassembling and transporting transformers. 6. A transformer comprising a plurality of constituent parts including a transformer tank, an iron core, a winding, and a winding attached portion connected to the winding is disassembled into a plurality of transportation units and transported to an installation site. Disassembling and transporting the transformer at the installation site In the transporting and assembling method of the transformer, the winding attachment part is fixed and stored at a predetermined position in the transformer tank, and the winding attachment part and the transformer tank A method for transporting and assembling a disassembling transport transformer, characterized in that the transporter is transported as an integral transport unit to the installation location.