JP2003168615A - Method for disposal of transformer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for the disposal of a transformer, which is capable of efficiently removing insulating oil containing harmful additives as it restrains members subjected to disposal from increasing in volume. <P>SOLUTION: An iron core 9 is separated from a coil, and a first core 14 is inserted into a window provided to the iron core 9 (Figure 4 (b)). Then, the iron core 9 is clamped by the first core 14 and lateral rams 12 and 12 by legs 9a and 9a and compressed with vertical rams 11 and 11 (Figure 4 (c)). As a result, cracks occur between the layers of the iron core 9 associated with deformations of yokes 9b and 9b, so that evaporation paths for insulating oil left between the layers can be formed. The yokes 9b and 9b are pressed by the vertical rams 11 and 11 furthermore in the direction of lamination, by which the insulating oil left between the layers can be squeezed out. Thereafter, the iron core 9 is heated and decompressed through vacuum thermal treatment, so that insulating oil can be efficiently removed by evaporation. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a transformer, and more particularly, to a transformer by efficiently removing insulating oil containing harmful additives while suppressing an increase in the volume of the treated member. The present invention relates to a transformer processing method that can be easily classified into valuable materials and stored materials.

[0002]

2. Description of the Related Art Conventionally, for example, a used pole transformer has been dismantled by removing insulating oil, and then iron and copper have been separated and collected as valuable resources by a processor, and have been effectively used.

When an additive (eg, polychlorinated biphenyl, hereinafter referred to as "PCB") whose use is prohibited by the country is detected in the insulating oil of pole transformers that use recycled oil. There is. PCB has excellent electrical insulation properties and flame retardance properties, but is a harmful substance that adversely affects the human body. Therefore, in order to dismantle the pole transformer and recover iron and copper, it is necessary to use P
The CB needs to be separated.

As a processing method for separating the PCB from the pole transformer, for example, as described in JP-A-9-192534, a pole transformer without insulating oil is vacuum-heated in its original state. There are some which perform vacuum heat treatment using a furnace. In this treatment method, the pole transformer is housed in a vacuum heating furnace and heated in a depressurized state to evaporate and remove the PCB together with the insulating oil from the pole transformer. Then, each constituent member of the pole transformer from which the insulating oil containing PCB has been removed is used as a valuable resource.

[0005]

However, in this processing method, since the pole transformer is vacuum-heated in its original state, heat conduction to the inside is slow and heating efficiency is poor. Therefore, in order to separate the PCB from each component of the pole transformer, a large amount of energy and time are required, and there is a problem that the processing cost increases. Further, when the iron core and the coil are impregnated with varnish, the varnish layer formed on the surface of the iron core and the coil sufficiently prevents the insulating oil that has penetrated into each layer of the iron core or inside the coil wound tightly. It cannot be removed by evaporation. Therefore, this treatment method has a problem that the PCB cannot be separated from the varnish-impregnated pole transformer to a predetermined reference value or less.

For this reason, in Japanese Patent Laid-Open No. 2000-277350, a transformer from which insulating oil has been removed is vacuum-heated,
Next, a processing method is described in which the transformer subjected to the vacuum heat treatment is subjected to vacuum heat treatment again after the iron core and the coil are disassembled. According to this treatment method, the iron core separated from the coil of the transformer which has been subjected to the vacuum heat treatment first is disassembled, and the vacuum heat treatment is performed again in a state where the respective layers of the iron core are separated. As a result, the insulating oil remaining between the layers of the iron core can be removed by evaporation, and the PCB can be satisfactorily separated from the iron core.

However, in the disassembling work for disposing the iron core layers in a disjointed state, it is necessary to rewind the iron core layer by layer or crush the iron core itself. Therefore, there is a problem in that the disassembling work of the iron core becomes a very complicated work, and the processing cost rises as the working man-hour increases. Further, when each layer of the iron core is disassembled into pieces, the iron core after disassembly becomes a large number of thin plate-shaped pieces having a large surface area, so that the disassembly increases the overall volume. Therefore, in order to accommodate the thin plate-shaped pieces after disassembly, there is a problem that a storage volume of about 5 to 10 times that of the original shape of the iron core must be secured. In addition, in order to remove the insulating oil by evaporation, 2
Since the vacuum heat treatment is required for multiple times, there is a problem that the iron core processing operation takes time and the processing cost increases.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to efficiently remove insulating oil containing harmful additives while suppressing an increase in the volume of the treated member, and An object of the present invention is to provide a method for treating a transformer that can easily classify a container into a valuable and a stored item.

[0009]

In order to achieve this object, the method for treating a transformer according to claim 1 is a transformer that uses insulating oil containing harmful additives and is a valuable resource and a storage item. And a draining step of draining the insulating oil stored in the case of the transformer, and the transformer from which the insulating oil is drained by the draining step is housed in the case and the case. And a disassembling step of disassembling into a transformer content having an iron core, and a separating step of cutting the coil of the transformer content disassembled by the disassembling step and separating the transformer content into the coil and the iron core. And a crushing step of crushing and subdividing the coil separated by the separating step, a sorting step of sorting the coil subdivided by the crushing step into a copper wire and an insulator, and the separating step. Yo By pressing the separated cores in at least one direction to reduce the volume of the cores and discharge the insulating oil remaining between the core layers, and the cores pressed by the pressing step. A vacuum heating step in which the case decomposed in the decomposition step, the copper wire and the insulator selected in the selection step are housed in a vacuum heating device, and vacuum heating is performed for a predetermined time or more under predetermined temperature and pressure conditions. And a recovery step of recovering the case, the copper wire, and the iron core vacuum-heated by the vacuum heating step as valuable resources, and a storage step of storing the insulating material vacuum-heated by the vacuum heating step in a sealed container. I have it.

According to a second aspect of the present invention, there is provided a transformer processing method according to the first aspect, wherein the iron core has a pair of leg portions facing each other and one end side and the other end side of the leg portions. Having a pair of joints each having the same or a short length as the leg portion and joined together, the pressurizing step,
A mandrel inserting step of inserting a mandrel member between the facing surfaces of the legs of the iron core, and a leg part of the iron core in which the mandrel member is inserted by the mandrel inserting step from a side opposite to the mandrel member. The leg portion is pressed by a pressure ram, and the leg portion of the iron core is clamped and held by the mandrel member and the pressure ram, and the leg portion is stopped by the leg portion pressing step. A joint pressurizing step of compressing the joint of the iron core by compressing the joint with a second pressurizing ram in a direction substantially orthogonal to the pressurizing direction of the pressurizing ram;
And a mandrel removing process for extracting the mandrel member from the iron core compressed by the joint pressurizing process.

According to a third aspect of the present invention, there is provided the transformer treatment method according to the second aspect, wherein the core bar insertion step is performed so that the facing surfaces of the legs of the iron core are widened. A guide mounting step of mounting the guide member on the leg portion of the iron core, and pressing the joint portion of the iron core on which the guide member is mounted by the guide mounting step to widen between the facing surfaces of the leg portions of the iron core. And a step of expanding, wherein the cored bar member is inserted between the facing surfaces of the legs of the iron core expanded by the step of expanding.

According to a fourth aspect of the present invention, there is provided the transformer treatment method according to the second or third aspect, wherein the pressurizing step is performed after the mandrel removal step and then the joint portion of the iron core. A second mandrel inserting step of inserting a second mandrel member between the facing surfaces of the second mandrel, and a joint part of the iron core in which the second mandrel member is inserted by the second mandrel inserting step, A joint pressing step of pressurizing from a side opposite to the gold member by the second pressure ram, and clamping and pressing the joint of the iron core by the second mandrel member and the second pressure ram; A leg portion for compressing the leg portion of the iron core, the joint portion of which is stopped by the joint portion pressing step, by the pressure ram from a direction substantially orthogonal to the direction of pressure by the second pressure ram. It is provided with a pressurizing step and a second mandrel removing step of extracting the second mandrel from the iron core compressed by the leg pressurizing step.

According to a fifth aspect of the present invention, there is provided the transformer treatment method according to any one of the second to fourth aspects, wherein the pressurizing step is performed after the core metal removing step, or After the second mandrel removing step, a compression stroke is provided in which the iron core is pressed and compressed by the pressure ram and the second pressure ram from two directions substantially orthogonal to each other.

[0014]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the present embodiment, as the transformer to be processed, a pole-mounted transformer for distribution (hereinafter referred to as "transformer") arranged on a power pole or the like will be described.

FIG. 1 is a flow chart showing the processing method of the transformer 1 in one embodiment of the present invention. Referring to this flow chart, insulating oil containing PCB 2
The method of removing the transformer 1 from the transformer 1 and dividing the transformer 1 into valuables and stored items will be described. Also,
Details of each processing step shown in the flowchart will be sequentially described with reference to FIGS. First, the insulating oil 2 containing PCB is removed from the transformer 1 by suction or dropping as much as possible (S1). Here, details of the step (S1) of removing the insulating oil 2 from the transformer 1 will be described with reference to FIG.

FIG. 2 is a sectional view showing a state in which the insulating oil 2 is drained from the transformer 1. In addition, in FIG. 2, Case 3,
The storage container 8 is shown in cross section and each member is schematically shown. The transformer 1 mainly includes a case 3, a transformer contents 4, and an insulator 5, and the insulating oil 2 is provided in the case 3
It is stored inside. In order to remove the insulating oil 2, as shown in FIG. 2, after removing the cover (not shown) from the transformer 1, the other end of the hose 7 having one end connected to the pump 6 is inserted into the case 3. . Then, by driving the pump 6, the insulating oil 2 is sucked from the case 3 and discharged into the storage container 8 such as a drum can. Further, instead of sucking the insulating oil 2 by the pump 6, the transformer 1 may be tilted and the insulating oil 2 may be directly discharged into a storage container such as the drum can 8.

After sucking the insulating oil 2 as described above, the transformer 1 is inverted so that the opening (upper side in FIG. 2) of the case 3 faces downward, and the insulating oil 2 remaining in the case 2 is dropped. Let When dropping the insulating oil 2, the ambient temperature should be 2
It is preferable to keep the temperature at 5 ° C or higher. When the ambient temperature is low, the work time required for dropping increases as the apparent viscosity of the insulating oil 2 increases, which causes an increase in processing cost, which is not preferable. In addition, it is preferable to maintain the transformer 1 in an inverted state for at least about 12 hours before dropping the insulating oil 2. When the transformer 1 is maintained in the inverted state for about 24 hours, most of the insulating oil 2 can be dripped from the inside of the case 2 of the transformer 1, and the insulating oil 2 may hinder the work in each subsequent process. Can be prevented. In addition, when dropping the insulating oil 2 described above, it is not necessary to completely invert the transformer 1,
The insulating oil 2 may be dropped in a tilted state.

Returning to FIG. 1, description will be made. After the insulating oil 2 is drained from the transformer 1 (S1), the transformer 1 from which the insulating oil 2 has been drained is disassembled, and the transformer contents 4 stored in the case 3 is taken out (S2). The case 3 from which the transformer contents 4 have been taken out is subjected to vacuum heat treatment to evaporate and remove the insulating oil 2 as described later (S8).

On the other hand, the transformer contents 4 taken out from the case 3 are composed of the iron core 9 and the coil 10, and the heat transfer is poor and the heating efficiency is poor in the original state. Further, when the iron core 9 and the coil 10 are impregnated with varnish, the insulating oil 2 that has penetrated into each layer of the iron core 9 and the inside of the coil 10 that is tightly wound is sufficiently provided by the varnish layer formed on the surface. It cannot be removed by evaporation. Therefore, the contents of the transformer 4
In order to efficiently evaporate and remove the insulating oil 2, it is necessary to carry out a pretreatment process in advance before the vacuum heating treatment (S8) described later (S3 to S7).

In the transformer contents 4 taken out from the transformer 1, first, the coil 10 wound around the iron core 9 is cut (S3), the coil 10 disassembled by the cutting is removed from the iron core 9, and the transformer contents 4 are removed. Iron core 9 in the original state
And the coil 10 are separated (S4). Where coil 1
Details of the cutting of 0 and the steps (S3, S4) of separating the iron core 9 and the coil 10 will be described with reference to FIG.

FIG. 3A is a top view of the transformer contents 4, and FIG. 3B is a top view of the transformer contents 4 showing a state where the cut coil 10 is separated from the iron core 9. The coil 10 is installed in a cutting device (not shown) equipped with a cutting blade, and the cutting blade of the cutting device is brought into contact with four end surfaces (cutting virtual lines III-1 to III-4) of the coil 10. . Then, the cutting blade is moved in the axial direction of the coil 10 (see FIG.
By moving along (a direction perpendicular to the paper surface of (a)),
Each coiled copper wire of the coil 10 is pressed out, and the coil 1
0 is cut into a state of being roughly divided into two. The cutting blade is a hook-shaped member made of cemented carbide with one edge serving as a cutting edge, and the length of the blade portion is about 70 mm, the blade width is about 10 mm,
Blade angle: Approximately 45 °. Also, the coil 10
Are four cutting points (cutting virtual line I shown in FIG. 3A).
It is not necessary to cut II-1 to III-4) with four cutting blades at the same time, and may be cut at two points or at one point.

As described above, each coil 10 is cut into two substantially divided parts. Therefore, it can be removed from the iron core 9 by rotating in the circumferential direction.
Therefore, the transformer contents 4 are, as shown in FIG.
The disassembled coil 10 and the iron core 9 that maintains the original state are separated, and the iron core 9 and the coil 10 can be separately processed as described later.

Returning to FIG. 1, description will be made. The iron core 9 separated in the above-described iron core-coil separation step (S4) is pressure-processed by the pressure device (S5). The step of pressing the iron core 9 (S5) is for compressing the iron core 9 to reduce the volume of the iron core 9 and to process the iron core 9 into a form suitable for removing the insulating oil 2 by evaporation. . Here, details of the step (S5) of pressurizing the iron core 9 will be described with reference to FIGS. 4 and 5.

FIG. 4 (a) is a front view of the iron core 9 in a state before pressurization, and FIG. 4 (b) is a schematic view of the iron core 9 in which the first core 14 is inserted. 4 is a front view of FIG.
(C) is a front view of the iron core 9 schematically showing a step of pressurizing the yoke portions 9b, 9b. In addition, FIG.
In (c), a part of the pressurizing device is omitted, and the pressurizing device is schematically illustrated only from the vertical ram 11 and the horizontal ram 12.
As shown in FIG. 4A, the iron core 9 includes a pair of facing leg iron portions 9a, 9a and a pair of yoke portions 9b, 9b connecting one end and the other end of the leg iron portions 9a, 9a, respectively. It has and. The leg iron portions 9a, 9a have a coil 10 on the outer periphery thereof.
Is the part that was wound, and has a dimension longer than the yoke portions 9b, 9b. Therefore, the front view shape of the iron core 9 is formed in a vertically long substantially rectangular shape as shown in FIG.

When pressurizing the iron core 9, first, the first mandrel 1 is placed substantially in the center between the facing surfaces of the leg iron portions 9a, 9a of the iron core 9.
Insert 4. The first mandrel 14 is composed of the leg iron portions 9a of the iron core 9,
9a is a member for preventing buckling of the core 9a and deforming the iron core 9 in the pressing direction with good balance. The first mandrel 14 has a lateral width (width in the left-right direction in FIG. 4B) larger than the distance L between the facing surfaces of the leg iron portions 9a, 9a (see FIG. 4A). Therefore, when inserting the first core metal 14,
As shown in the left figure of (b), the yoke portions 9b, 9b of the iron core 9
1 in the vertical direction (vertical direction in FIG. 4B).
Pressurize with 1, 11. By such pressurization, the iron core 9
Expands in the horizontal direction (horizontal direction in FIG. 4B) while compressing and deforming in the vertical direction (vertical direction in FIG. 4B), and expands between the facing surfaces of the leg iron portions 9a, 9a of the iron core 9. Open. As a result, the first mandrel 14 can be easily inserted between the facing surfaces of the leg iron portions 9a, 9a of the expanded iron core 9 (FIG. 4).
(Refer to the right figure of (b)). In addition, such a process corresponds to the mandrel inserting step described in claim 2. The lateral width of the first mandrel 14 (left-right direction in FIG. 4B) is about 1.5 to about the distance L between the facing surfaces of the leg iron portions 9a, 9a of the iron core 9 in the original state. It is doubled. On the other hand, the height of the first mandrel 14 (vertical direction in FIG. 4B) is approximately 1/3 to the distance H between the facing surfaces of the yoke portions 9b, 9b of the iron core 9 in the original state. It is about 1/2.

Here, the leg iron portions 9a, 9a of the iron core 9 pressurized as described above are inward (in a direction in which opposing surfaces are close to each other).
In some cases, the laminated body on the facing surface side is partially peeled off and bent inwardly because the laminated body is pressed in a direction substantially orthogonal to the laminating direction. In that case, the first mandrel 1 is inserted between the facing surfaces of the leg iron portions 9a, 9a of the iron core 9.
4 cannot be inserted and the pressurizing process cannot be continued. Therefore, when pressurizing the iron core 9 by the vertical rams 11 and 11, as shown in the left diagram of FIG. 4B, the guide iron members 9 and 13 are used to make the leg iron portions 9a and 9a of the iron core 9 inside. The deformation direction is controlled so that it does not bend to the right. As a result, it is possible to prevent the deformation of the leg iron portions 9a, 9a of the iron core 9 and to improve the work efficiency of inserting the first mandrel 14. In addition, such processing is claimed in claim 3.
It corresponds to the guide installation process and expansion process described.

The first mandrel 14 is connected to the leg iron portions 9a, 9a of the iron core 9.
Of the iron cores 9b, 9b after being inserted between the facing surfaces of the
Is processed into a form suitable for removing the insulating oil 2 by evaporation. First, as shown in the left diagram of FIG.
The iron core 9 is pressed from both sides by the
The a and 9a are clamped between the lateral rams 12 and 12 and the first mandrel 14 to be fixed. It should be noted that such processing corresponds to the leg pressing step of claim 2. The height of the horizontal rams 12, 12 (vertical direction in FIG. 4C) is approximately 1 with respect to the height of the iron core 9 in the original state (vertical direction in FIG. 4A).
/ 4 to about 1/3.

The leg iron portions 9a, 9a of the iron core 9 are connected to the horizontal ram 12,
After being pressed and fixed by 12, the yoke portions 9b, 9b of the iron core 9 are connected to the vertical rams 11, 1 as shown in the right diagram of FIG. 4 (c).
1 pressurizes in the vertical direction (vertical direction in FIG. 4C) to bring the yoke portions 9b, 9b of the iron core 9 into contact with the first mandrel 14.
Since the iron core 9 is pressed by the lateral rams 12 and 12, the iron core 9 cannot be widened in the lateral direction (the lateral direction in FIG. 4C). Therefore, the yoke portions 9b and 9b are bent and deformed into a substantially corrugated shape in a front view, and the amount of deformation increases. Therefore, along with the deformation of the yoke portions 9b, 9b of the iron core 9, the yoke portions 9b, 9b
Cracks can be generated between the layers b, and when the iron core 9 is impregnated with varnish, cracks can also be generated in the varnish layer. As a result, the evaporation path of the insulating oil 2 remaining between the layers of the iron core 9 can be formed. In addition, such a process corresponds to the joint pressurizing step.

The yoke portions 9b, 9b of the iron core 9 are the first core 14
After abutting with, the yoke portions 9b, 9b of the iron core 9 are further pressed by the vertical rams 11, 11. Yoke part 9 of iron core 9
b and 9b are compressed in the stacking direction by the pressurization of the vertical rams 11 and 11, and as a result, the insulating oil 2 remaining between the layers can be squeezed out. In addition, such a process corresponds to the joint pressurizing step. Further, the pressurization of the yoke portions 9b, 9b of the iron core 9 by the vertical rams 11, 11 is preferably continued with a load of about 5 tons or more for about 30 seconds or more.

After pressurizing and compressing the yoke portions 9b, 9b of the iron core 9, the first mandrel 14 is removed from the iron core 9. Vertical ram 1
1 and 11 and the lateral rams 12 and 12 are unloaded, and the iron core 9 is springed back, thereby expanding between the facing surfaces of the leg iron portions 9a and 9a or the yoke portions 9b and 9b of the iron core 9. Therefore, the first mandrel 14 can be easily removed from the iron core 9. In addition, such a process corresponds to the mandrel removing process of claim 2.

Next, the leg iron portions 9a, 9a of the iron core 9 are pressed and processed into a form suitable for evaporation removal of the insulating oil 2 as well as the yoke portions 9b, 9b. Reduce the volume. FIG. 5A is a front view of the iron core 9 schematically showing the step of pressurizing the leg iron portions 9a, 9a, and FIG.
It is a front view of the iron core 9 which showed the process of reducing the volume of the iron core 9.
5A and 5B, a part of the pressurizing device is omitted, and the pressurizing device is schematically illustrated only from the vertical ram 11 and the horizontal ram 12.

First, the second mandrel 15 is inserted into the iron core 9.
The second mandrel 15 corresponds to the first mandrel 14 (see FIG. 4).
The height and the width are smaller than those of (b) and (c). Therefore, the second inserted in the iron core 9
As shown in the left diagram of FIG. 5A, the mandrel 15 has a predetermined gap formed between the facing surfaces of the leg iron portions 9a, 9a and the yoke portions 9b, 9b. In addition, such a process corresponds to the second mandrel inserting step described in claim 4. Also, this second core 15
The height (vertical direction in Fig. 5 (a)) of the
The height of the mandrel 14 is about 1/2 to about 2/3, and the width (horizontal direction in FIG. 5A) is about 2 /.
It is set to 3 to approximately 3/4.

After inserting the second mandrel 15 into the iron core 9, first, the iron core 9 is vertically moved by the vertical rams 11 and 11 (see FIG. 5).
(Up and down direction of (a)), the yoke portions 9b, 9 of the iron core 9 are pressed.
b in contact with the second mandrel 15 and the second mandrel 15
It is clamped between the vertical rams 11 and 11 and pressed. Iron core 9
Compressively deforms in the vertical direction by the amount of the space between the facing portions of the yoke portions 9b, 9b and the second mandrel 15, and the leg iron portions 9a, 9
a projects and deforms outward (to the side opposite to the second mandrel 15). It should be noted that such processing corresponds to the joint pressing step in claim 4.

Then, the leg iron portions 9a, 9a of the iron core 9 are laterally pressed by the lateral rams 12, 12 (left and right directions in FIG. 5 (a)), as shown in the right diagram of FIG. 5 (a). The leg iron portions 9a, 9a of the iron core 9 are brought into contact with the second mandrel 15. As described above, the leg iron portions 9a, 9a protruding outward (on the side opposite to the second mandrel 15) have lateral rams 12, 12 at substantially the center thereof.
As a result, the leg iron portions 9a, 9a can be largely deformed because the pressure is applied in a manner of being pushed back toward the second mandrel 15. Therefore, along with the deformation of the leg iron portions 9a, 9a of the iron core 9, cracks can be generated between the layers of the leg iron portions 9a, 9a, and further, when the iron core 9 is impregnated with varnish, The varnish layer can also be cracked. As a result, the evaporation path of the insulating oil 2 remaining between the layers of the iron core 9 can be formed. In addition, such a process corresponds to the leg pressurizing step described in claim 4.

The leg iron portions 9a, 9a of the iron core 9 are shown in FIG.
After contacting with the second core 15, as shown in the right figure of FIG. 1, the leg iron portions 9a, 9a of the iron core 9 are further pressed by the lateral rams 12, 12. The leg iron portions 9a, 9a of the iron core 9 are compressed in the stacking direction by the pressure of the lateral rams 12, 12, and as a result, the insulating oil 2 remaining between the layers can be squeezed out. In addition, such a process corresponds to the leg pressurizing step described in claim 4. In addition, the pressurization of the leg iron portions 9a, 9a of the iron core 9 by the lateral rams 12, 12 is preferably continued with a load of about 5 tons or more for about 30 seconds or more.

After pressing the leg iron portions 9a, 9a of the iron core 9, the second mandrel 15 is removed from the iron core 9. Second core 15
Is the same as when removing the first mandrel 14
It is possible to easily remove the iron core 9 from the iron core 9 by unloading the pressure load of the lateral rams 12 and 12. It should be noted that this process corresponds to the second mandrel removing process of claim 4.

Next, the iron core 9 from which the second mandrel 15 has been removed is pressed by the vertical rams 11 and 11 and the horizontal rams 12 and 12 from two directions substantially orthogonal to each other to reduce the volume. First, the iron core 9 and the vertical ram 1
1, 11 applies pressure in the vertical direction (vertical direction in FIG. 5B) to bring the facing surfaces of the yoke portions 9b, 9b into contact with each other. Then, while maintaining the pressure applied by the vertical rams 11 and 11, the horizontal rams 12 and 12 laterally (the horizontal direction in FIG. 5B).
Also pressurize at the same time. As a result, the volume of the iron core 9 can be reduced, and the insulating oil 2 remaining between the layers can be squeezed out. It should be noted that such processing corresponds to the compression step described in claim 5.

In this way, the iron core 9 is pressed without the first core 14 or the second core 15 inserted, so that the facing surfaces of the yoke portions 9b, 9b of the core come into contact with each other. The iron core 9 can be compressed up to. Therefore, the volume of the iron core 9 can be sufficiently reduced, and for example, the volume of the iron core 9 after the treatment can be reduced as compared with the case of rewinding or crushing each layer of the iron core 9 as in the conventional treatment method. It can be reduced to 1/5 to 1/10. Further, at the same time as the volume reduction treatment, cracks can be generated between the layers of the iron core 9, and when the iron core 9 is impregnated with varnish,
Cracks can also be generated in the varnish layer to form an evaporation path for the insulating oil 2. As a result, the insulating oil 2 can be surely evaporated and removed from the iron core 9 to a predetermined reference value or less by the vacuum heating treatment described later.

Returning to FIG. 1, description will be made. The coil 10 separated in the above-described iron core-coil separation step (S4) is
It is crushed by a crushing device (not shown) until it has a predetermined size (S6). This crushing step (S6) is for crushing the coil 10 to subdivide it into copper wires 16 and paper wood 17, and the coil 10 is
It is crushed in two stages, primary crushing and secondary crushing. The coil 10 is first removed from the iron core 9 (see FIG. 3).
(See (b)) As it is, it is put into a biaxial crusher (not shown) and roughly crushed (primary crushing). Coarsely crushed coil 1
0 is then crushed by a uniaxial crusher (not shown) to a diameter of approximately 1
It is finally crushed (secondary crushing) to a size that allows it to pass through a 5 mm screen (not shown), and separated into copper wire 16 and paper wood 17. Thus, by crushing the coil 10 in two stages, the coil 10 can be efficiently crushed, and as a result, the coil 10 is subdivided.
6 and paper 17 can be efficiently separated.

After crushing the coil 10 (S6), the subdivided copper wire 16 and paper wood 17 are selected and the copper wire 16 and paper wood 17 are individually separated (S7). A wind power sorter (not shown) is used for classification. According to the wind power sorting apparatus, the subdivided copper wire 16 and the paper trees 17 are transferred by wind force from the upstream side to the downstream side in the transfer path of the wind power sorting apparatus, and the paper trees having a light weight. The copper wire 16 and the paper wood 17 are separated by discharging the copper wire 16 from a discharge port separate from the heavy copper wire 16.

Next, the case 3 whose contents have been taken out in the contents taking out step (S2), the iron core 9 which has been pressed under the pressing step (S5), and the copper wire 16 which has been separated through the separating step (S7). And paper wood 17 are vacuum-heated (S
8). The vacuum heat treatment is a treatment for evaporating and removing the PCB together with the insulating oil 2 from each constituent member by heating each constituent member of the transformer 1 under reduced pressure. Here, details of the vacuum heat treatment step (S8) will be described with reference to FIG.

FIG. 6 is a schematic diagram of the vacuum heat treatment apparatus 18. In addition, in FIG. 6, each constituent element of the vacuum heat treatment apparatus 18 is shown in a partial sectional view and schematically. The vacuum heat treatment device 18 mainly includes a heating furnace 19, coolers 20, 21, 22 and vacuum pumps 23, 24 and an exhaust gas treatment device 25, and includes a case 3, an iron core 9,
A copper wire 16 and a paper tree 17 (hereinafter, referred to as “each component”) are housed in a heating furnace 19 and heated and decompressed at a predetermined temperature so that each component and the insulating oil 2 together with PC
This is an apparatus for removing B by evaporation.

When each component of the transformer 1 is subjected to the vacuum heat treatment by the vacuum heat treatment device 18, each component is first placed on the carrier table 26. Copper wire 16 and paper wood 1
Since 7 is subdivided by the crushing step (S6) described above, the carrier table 26 is stored in a predetermined storage container.
Just place it on top. By accommodating the carrier table 26 in the heating furnace 19 and closing the opening / closing door 27, the constituent members placed on the carrier table 26 are substantially sealed in the internal space 19a of the heating furnace 19. Housed inside.

An electric heater 28 is provided outside the wall surface of the heating furnace 19.
Is provided, and by energizing the electric heater 28, the inside space 19a of the heating furnace 19 can be heated and maintained at a predetermined temperature. Further, an exhaust pipe 29 is arranged in the heating furnace 19 so as to pass through one wall surface (right side in FIG. 6). In this exhaust pipe 29, the coolers 20, 2 are provided.
1, 22, vacuum pumps 23, 24, and an exhaust gas treatment device 25 are connected to each other, and the internal space 19a of the heating furnace 19 is connected to the cooler 20 and the like via the exhaust pipe 29.

The internal space 19a of the heating furnace 19
After being housed inside, the interior space 19a is depressurized to approximately 930 Pa or less under normal temperature conditions by driving the second vacuum pump 24 while opening the first vacuum pump 23. In this state, the inside space 19a is heated by the electric heater 28. In this case, the temperature in the internal space 19a is set in the range of approximately 100 ° C to approximately 130 ° C. By heating the internal space 19a in a depressurized state as described above, the internal space 19a can be depressurized at room temperature as compared with the conventional case where depressurization is performed at a high temperature. Therefore, for example, it is possible to extremely reduce the heat load on the coolers 20, 21, 22 due to the exhaust gas, and as a result, the coolers 20, 21, 22 can be made compact, lightweight and economical with a simple configuration. Can be created. Moreover, since the interior space 19a is heated in a depressurized state, it is possible to prevent the danger that the insulating oil 2 is ignited or the like due to the rapid rise in temperature with oxygen remaining.

The vapor of the insulating oil 2 evaporated from each component passes through the exhaust pipe 29 from the internal space 19a and is mostly cooled and condensed by the first cooler 20 to be liquefied. The liquefied insulating oil 2 is recovered from the first cooler 20 in a recovery container (not shown) and processed.

On the other hand, the PCB passed through the first cooler 20
Exhaust gas containing the gas reaches the second and third coolers 21 and 22 while passing through the vacuum pumps 23 and 24. Second,
The third coolers 21 and 22 are gas-liquid separating means (not shown).
It is possible to separate and collect the oil component in the exhaust gas. A known condenser (condenser), mist collector, or the like is used as the gas-liquid separating means. Therefore,
The PCB-containing exhaust gas that has reached the second and third coolers 21 and 22 is almost completely collected and separated by the gas-liquid separating means. The insulating oil 2 collected by the second and third coolers 21 and 22 is the first oil described above.
As in the case of the cooler 20 of FIG.

The exhaust gas that has passed through the second and third coolers 21 and 22 passes through the exhaust gas processing device 25 and is discharged to the atmosphere. As the exhaust gas treatment device 25, for example, a combination of an electrostatic mist separator and an adsorption member such as activated carbon is used. By filtering the exhaust gas using the exhaust gas treatment device 25, it is possible to remove the PCB in the exhaust gas that has not been recovered by the second and third coolers 21 and 22 due to an abnormality of the equipment or the like. As a result, the exhaust gas generated from the heating furnace 19 can be discharged into the atmosphere as clean air.

As described above, the internal space 1 of the heating device 19
After heating the interior 9a to a predetermined temperature while reducing the interior pressure to a predetermined pressure, the interior space 19a is further heated by the electric heater 28. The temperature in the internal space 19a is approximately 200 ° C to
It is heated to approximately 300 ° C. or lower, and the pressure in the internal space 19a is set to be equal to or lower than the vapor pressure of the insulating oil 2 at the heating temperature by simultaneously driving the first and second vacuum pumps 23 and 24. Reduce pressure and maintain such pressure. For example, when the heating temperature in the internal space 19a is about 300 ° C., the heating temperature is reduced to about 200 Pa by reducing the pressure to about 900 Pa or less.
In the case of ℃, it is preferable to reduce the pressure to about 7 Pa or less. By reducing the pressure, the vapor pressure temperature of the insulating oil 2 can be lowered, and the PCB is evaporated together with the insulating oil 2 from each member housed in the internal space 19a while preventing the risk of ignition of the insulating oil 2. It can be removed.

When the surface temperature of each component housed in the internal space 19a of the heating furnace 19 reaches, for example, about 300 ° C., the pressure in the internal space 19a is set to about 900 Pa or less and the applied state is set to about 2. Keep on time. It is to be noted that each of the constituent members housed in the internal space 19a may have a surface temperature of about 2
When heating at 00 ° C., it is preferable to maintain the pressure in the internal space 19a for about 2 hours while setting the pressure to about 7 Pa or less.

The vapor of the insulating oil 2 evaporated from each component is the first to third coolers 20 to 20 as in the case described above.
It can be liquefied by cooling and condensing by 22. Further, since the exhaust gas that has passed through the first to third coolers 20 to 22 is filtered by the exhaust gas processing device 25, it is discharged into the atmosphere as clean air.

Thus, the internal space 19a of the heating furnace 19 is
By maintaining the inside temperature at a temperature of about 300 ° C. or less and a pressure of about 900 Pa or less and performing vacuum heat treatment, the internal space 19
The insulating oil 2 can be evaporated and removed from each of the constituent members housed in a, and the PCB can be removed from each of the constituent members as the insulating oil 2 is evaporated. For example, case 3
Are formed in a shape with many voids. Therefore, the inside and outside of the case 3 can be efficiently heated, and the insulating oil 2 can be evaporated and removed without remaining.

The iron core 9 is pressed by the above-described pressing step (S5, see FIG. 1) before being heated and depressurized by the vacuum heating process. Therefore, the insulating oil 2 that has penetrated between the layers of the iron core 9 is pressed out from the layers by pressure. Further, even when the insulating oil 2 cannot be sufficiently squeezed out from each layer, the pressurization causes a crack to be formed in each layer in the iron core 9, and
In the case of the iron core 9 impregnated with varnish, cracks are also formed in the varnish layer, so that the evaporation path of the insulating oil 2 remaining between the layers is secured. Therefore, by heating and reducing the pressure of the iron core 9 by the vacuum heat treatment, the insulating oil 2 remaining between the layers can be removed by evaporation from the iron core.

On the other hand, since the insulating oil 2 has penetrated into the paper wood 17 inside, it is generally difficult to remove the insulating oil 2. However, the paper wood 17 in this embodiment is subdivided by the above-described crushing step (S6, see FIG. 1) before being heated and depressurized by the vacuum heating process. Therefore, the insulating oil 2 that has penetrated into the paper 17 can be efficiently evaporated.

Returning to FIG. 1, description will be made. After the insulating oil 2 is evaporated and removed from each component by the vacuum heat treatment (S
8) Each component is individually collected or stored (S
10 to S12). When the case 3 is collected and transported for reuse, a large storage volume is required as it is. Therefore, the volume is reduced by pressurizing with a pressurizing device (not shown) such as a press (S9), and the iron valuable resource is recovered in a recovery container (not shown) (S10). The volume reduction step (S9) of case 3 may be performed before the vacuum heat treatment step (S8).

Further, the iron core 9 is recovered in a recovery container (not shown) as an iron valuable resource as in the case 3 described above (S10), and the copper wire 16 is recovered as a copper valuable resource in a recovery container (not shown). )) (S11). On the other hand, paper trees 1
7 is stored and stored in a closed container (S12). In addition,
As described above, the iron core 9 is reduced in volume by pressure processing (S5), and the copper wire 16 is subdivided by crushing processing (S6). Therefore, the iron core 9 and the copper wire 17 can be efficiently housed in the collection container to reduce the size of the collection container. Therefore, the space required for storing such a recovery container can be reduced, and as a result, the processing cost of the transformer 1 can be reduced.

Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. This can be easily guessed.

For example, in the present embodiment, the transformer to be treated according to the present invention has been described by using the pole transformer for electric power distribution arranged on the electric pole or the like, but the transformer using the insulating oil may be used. For example, the present invention may be applied to transformers used in facilities such as buildings and hospitals, vehicles such as subways and bullet trains, transportation equipment such as ships, mines and underground facilities, and the like.

Further, as described above, the iron core 9 has the structure shown in FIG.
In (c), the leg iron parts 9a, 9a are the first core 14
It was clamped between the horizontal rams 12 and 12 and pressed. In this case, the pressing force of the lateral rams 12, 12 was not particularly described, but the load of about 5 tons or more may be continued for about 30 seconds or more. By compressing the leg iron portions 9a, 9a of the iron core 9 in the stacking direction, the insulating oil 2 remaining between the layers can be squeezed out. Similarly,
In FIG. 5 (a), the yoke portions 9b and 9b of the iron core 9 are shown as the second
In the case of sandwiching between the mandrel 15 and the vertical rams 11 and pressing them, the pressing force of the vertical rams 11 and 11 is set to about 5 tons or more and the applied load is continued for about 30 seconds or more. Is also good. By compressing the yoke portions 9b, 9b of the iron core 9 in the stacking direction, the insulating oil 2 remaining between the layers can be extruded to the outside.

In addition, in the present embodiment, in general, the first mandrel 14
Of inserting the yoke and pressing the yoke portions 9b, 9b (FIG. 4).
(See (c)), and insert the second mandrel 15 into the leg iron parts 9a, 9
The iron core 9 is evacuated after three processes including a step of pressurizing a (see FIG. 5 (a)) and a step of reducing the volume of the iron core 9 without inserting the core metal (see FIG. 5 (b)). The case of heating and reducing the pressure by the heat treatment has been described. However, it is not always necessary to perform the above three processes, and any one or two processes may be combined and omitted. For example, the first core 1
4 is inserted and the yoke portions 9b and 9b are pressure-processed (Fig. 4 (c)).
Then, insert the second mandrel 15 into the leg iron 9a,
By omitting the step of pressing 9a (see FIG. 5 (a)),
After reducing the volume of the iron core 9 without inserting the mandrel (see FIG. 5B), the iron core 9 may be heated and decompressed by a vacuum heat treatment.

[0061]

According to the method for treating a transformer of the first aspect, the iron core is pressurized from at least one direction by the pressurizing step before being vacuum-heated by the vacuum heating step. Therefore, it is possible to cause cracks in each layer of the core along with the compressive deformation of the core that occurs in the pressurizing step, and to insulate the insulating oil remaining between the layers of the core to the outside. Furthermore, in the case of an iron core impregnated with varnish, a crack can be generated in the varnish layer formed on the surface of the iron core along with the compressive deformation of the iron core to form an evaporation path for insulating oil. . As a result, by heating the iron core processed by the pressurizing step in a vacuum by the vacuum heating step, it is possible to reliably evaporate and remove the insulating oil from the iron core to a predetermined reference value or less.

Further, by adopting a method of disassembling a soft coil in the iron core and separating it from the coil, the work for separating the coil from the coil is quicker than in the conventional case where the hard iron core itself is disassembled and crushed. -In addition to being easy to perform, the introduction of only a simple pressurizing step enables processing in a form suitable for removing insulating oil, so that the work can be simplified and the iron core can be processed efficiently. Therefore, unlike conventional processing methods, there is no need to perform complicated work such as rewinding or crushing each layer of the iron core, and the work man-hours can be significantly reduced. Therefore, there is an effect that the processing cost of the transformer as a whole can be reduced. Further, since the iron core processed in the pressing step is compressed and deformed in the pressing direction, there is also an effect that the volume of the iron core after the processing can be significantly reduced as compared with the conventional processing. .

Furthermore, since the vacuum heat treatment only has to be performed once when processing the transformer, the processing work of the transformer can be reduced, and the processing cost can be greatly reduced accordingly.

According to the transformer processing method of the second aspect, in addition to the effect of the transformer processing method of the first aspect, pressure is applied by the second pressure ram in the joint pressure step. The joint of the iron core is compressed while deforming in the pressing direction of the second pressing ram. Therefore, along with the deformation of the joint portion of the iron core, it is possible to generate cracks in each layer of the joint portion of the iron core and to press out the insulating oil remaining between the layers of the joint portion of the iron core to the outside. effective. Furthermore,
In the case of an iron core impregnated with varnish, with the deformation of the joint part of the iron core, cracks are also generated in the varnish layer formed on the iron core surface, and the effect of being able to form the evaporation path of the insulating oil is obtained. is there.

Further, since the leg portion of the iron core is pressed and held while being sandwiched between the mandrel member and the pressure ram, it is possible to support the leg portion of the iron core without bending it. The effect is that you can do it. Therefore, when the joint portion of the iron core is pressurized by the joint portion pressurizing step described above, it is possible to prevent the leg portion of the iron core from being bent due to the pressurization. It is possible to reliably deform and compress the second pressure ram in the pressure direction.

Further, the leg portion of the iron core is compressed while being supported between the mandrel member and the pressure ram. Therefore, by increasing the pressure of the pressure ram above a predetermined value,
There is an effect that a crack can be generated in each layer of the leg portion of the iron core, and the insulating oil remaining between the layers can be squeezed out to the outside. Further, in the case of an iron core impregnated with varnish, there is an effect that a crack can also be generated in the varnish layer formed on the surface of the iron core to form an insulating oil evaporation path.

According to the transformer processing method of the third aspect, in addition to the effect obtained by the transformer processing method of the second aspect, the legs of the iron core are guided so as to widen between the facing surfaces thereof. Since the guide member is installed, there is an effect that it is possible to surely widen between the facing surfaces of the legs by pressing the joint portion of the iron core. Therefore, the legs of the iron core are bent inward with respect to each other, so that the core member cannot be inserted, or the legs of the iron core are deformed unevenly, and the iron core is evenly balanced in the subsequent steps. It is possible to prevent the volume from being unable to be sufficiently deformed by being compressed and deformed.

According to the transformer treatment method of claim 4, in addition to the effect of the transformer treatment method of claim 2 or 3, the pressure is applied by the pressure ram in the leg pressure step. The legs of the iron core are compressed while deforming in the pressure direction of the pressure ram. Therefore, along with the deformation of the legs of the iron core, cracks can be generated in each layer of the legs of the iron core, and the insulating oil remaining between the layers of the legs of the iron core can be extruded to the outside. effective. Furthermore, in the case of an iron core impregnated with varnish, it is possible to form a crack in the varnish layer formed on the surface of the iron core along with the deformation of the legs of the iron core to form an insulating oil evaporation path. effective.

Further, since the joint portion of the iron core is fixed while being clamped between the second mandrel member and the second pressure ram, the joint portion of the iron core is not bent. The effect is that you can keep it. Therefore, when the leg portion of the iron core is pressed by the leg portion pressing step described above, it is possible to prevent the joint portion of the iron core from bending due to the pressurization. It is possible to reliably deform and compress the pressing ram in the pressing direction.

Further, the joint portion of the iron core is compressed while being supported between the second mandrel member and the second pressure ram. Therefore, by increasing the pressure of the second pressurizing ram to a predetermined value or more, cracks can be further generated in each layer of the joint portion of the iron core, and the insulating oil remaining between the layers can be externally exposed. There is an effect that it can be squeezed out. Further, in the case of an iron core impregnated with varnish, there is an effect that a crack can also be generated in the varnish layer formed on the surface of the iron core to form an insulating oil evaporation path.

According to the transformer processing method of the fifth aspect, in addition to the effect of the transformer processing method of any of the second to fourth aspects, the compression stroke is such that the legs or joints of the iron core are used. Since the mandrel member or the second mandrel member is pressed between the facing surfaces of the iron core, the iron core can be compressed until the facing surfaces of the legs or joints of the iron core come into contact with each other. . Therefore, there is an effect that the volume of the iron core processed in the compression step can be sufficiently reduced. For example, the volume of the iron core after treatment is set to 1 as compared with the case where each layer of the iron core is unwound or crushed as in the conventional treatment method.
It can be reduced to / 5 to 1/10.

[Brief description of drawings]

FIG. 1 is a flowchart showing a transformer processing method according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which insulating oil is removed from the transformer.

FIG. 3A is a top view of the contents of the transformer,
(B) is a top view of the contents of the transformer showing a state in which the cut coil is separated from the iron core.

FIG. 4 (a) is a front view of the iron core showing a state before pressurization, and FIG. 4 (b) is a front view of the iron core schematically showing a step of inserting a first mandrel, (C) is a front view of the iron core that schematically shows the step of pressing the yoke portion.

5A is a front view of the iron core schematically showing a step of pressurizing a leg iron portion, and FIG. 5B is a front view of the iron core showing a step of reducing the volume of the iron core.

FIG. 6 is a schematic diagram of a vacuum heat treatment apparatus.

[Explanation of symbols]

1 transformer 2 insulating oil 3 cases 4 Transformer contents (transformer contents) 9 iron core 9a Leg iron part (leg part) 9b Yoke part (joint) 10 coils 11 Vertical ram (second pressure ram) 12 Horizontal ram (pressurizing ram) 13 Guide member 14 1st core (core member) 15 Second mandrel (second mandrel member) 16 copper wire 17 Paper trees (insulators) 18 Vacuum heat treatment equipment S1 oil removal (oil removal process) S2 Contents removal (disassembly process) S3 coil cutting (separation process) S4 Iron core-Coil separation (separation process) S5 Pressurization (pressurizing process) S6 crushing (crushing process) S7 Copper wire-paper wood sorting (sorting process) S8 Vacuum heat treatment (vacuum heating process) S9 Volume reduction (volume reduction process) S10 Valuable materials recovery (collection process) S11 Valuables collection (collection process) S12 Storage (storage process)

Continued front page    (71) Applicant 000000239             EBARA CORPORATION             11-1 Haneda-Asahi-cho, Ota-ku, Tokyo (71) Applicant 000116666             Aichi Electric Co., Ltd.             1 Aichi-cho, Kasugai-shi, Aichi (72) Inventor Mitsumasa Shima             1 in Hisaemori, Nakayama, Atsumi-cho, Atsumi-gun, Aichi Prefecture             2 Atsumi Thermal Power Station, Chubu Electric Power Co., Inc. (72) Inventor Kenji Mizuno             20 Kitakanzan, Otakamachi, Midori-ku, Nagoya-shi, Aichi             No. 1 Chubu Electric Power Co., Inc.             Inside the laboratory (72) Inventor Yoshie Hase             East 2-1 Nakayama 7-chome, Aoba-ku, Sendai City, Miyagi Prefecture             Kita Electric Power Co., Inc. Research and Development Center (72) Inventor Yoshio Hirano             Chugoku Electric Power 4-33 Komachi, Naka-ku, Hiroshima City, Hiroshima Prefecture             Within the corporation (72) Inventor Hiroshi Wada             11-1 Haneda Asahi-cho, Ota-ku, Tokyo Co., Ltd.             Inside the EBARA CORPORATION (72) Inventor Tadashi Yagabe             11-1 Haneda Asahi-cho, Ota-ku, Tokyo Co., Ltd.             Inside the EBARA CORPORATION (72) Inventor Kazuo Nakamura             11-1 Haneda Asahi-cho, Ota-ku, Tokyo Co., Ltd.             Inside the EBARA CORPORATION (72) Inventor Yukio Hayashi             1 Aichi-cho, Kasugai-shi, Aichi Aichi Electric Co., Ltd.             Inside the company (72) Inventor Toshinori Kawauchi             1 Aichi-cho, Kasugai-shi, Aichi Aichi Electric Co., Ltd.             Inside the company (72) Inventor Fumio Kawase             1 Aichi-cho, Kasugai-shi, Aichi Aichi Electric Co., Ltd.             Inside the company (72) Inventor Shigeki Tsunekawa             1 Aichi-cho, Kasugai-shi, Aichi Aichi Electric Co., Ltd.             Inside the company (72) Inventor Yasuaki Shiro             1 Aichi-cho, Kasugai-shi, Aichi Aichi Electric Co., Ltd.             Inside the company

Claims (5)

[Claims] 1. A method for treating a transformer, which divides a transformer using insulating oil containing harmful additives into valuables and storage items, wherein the insulating oil is stored in a case of the transformer. And a disassembling step of disassembling the transformer from which the insulating oil has been removed by the oil removing step into the case and the transformer contents having the coil and the iron core housed in the case, and the disassembling step. A step of cutting the coil of the transformer contents disassembled by the step of separating the transformer contents into the coil and the iron core, and a step of crushing the coil separated by the separating step into smaller pieces; A sorting step of sorting the coil subdivided by the crushing step into a copper wire and an insulator, and at least one of the iron cores separated by the separating step.
By applying pressure in the direction of to reduce the volume of the iron core and discharge the insulating oil remaining between the iron core layers, the iron core pressed by the pressure step, and the iron core decomposed by the decomposition step. A vacuum heating process in which the case, the copper wire and the insulator selected in the selection process are housed in a vacuum heating device, and vacuum heating is performed for a predetermined time or more under a predetermined temperature and pressure condition, and vacuum heating is performed by the vacuum heating process. A transformer for recovering the case, the copper wire, and the iron core, which have been heated, as a valuable resource; and a storage step of storing the insulator heated in a vacuum in the vacuum heating step in a sealed container. How to treat the vessel. 2. The iron core includes a pair of facing leg portions, and a pair of joint portions that join one end side and the other end side of the leg portions and have a length equal to or shorter than the leg portions. The pressurizing step includes a mandrel inserting step of inserting a mandrel member between the facing surfaces of the legs of the iron core, and a step of inserting the mandrel member by the mandrel inserting step. A leg pressing step of pressing the leg portion from the side opposite to the mandrel member with a pressure ram and holding the leg portion of the iron core by the mandrel member and the pressure ram, and pressing the leg portion. A joint pressure step of compressing the joint portion of the iron core in which the leg portions are stopped by the stopping step by applying pressure by a second pressure ram from a direction substantially orthogonal to the pressure direction by the pressure ram; And a mandrel removing process for removing the mandrel member from the iron core compressed by the joint pressurizing process. Transformer processing method according to claim 1, wherein a. 3. The mandrel inserting step includes a guide mounting step of mounting a guide member for guiding the leg portions of the iron core so as to widen between the facing surfaces of the iron core, and a guide mounting step. And a step of expanding the joint of the iron core on which the guide member is mounted to expand between the facing surfaces of the legs of the core, and the leg of the iron core expanded by the expanding step. 3. The method for treating a transformer according to claim 2, wherein the cored bar member is inserted between the facing surfaces of the parts. 4. The pressurizing step includes a second cored bar inserting step of inserting a second cored bar member between the facing surfaces of the joint portions of the iron core after the cored bar removing step, and a second core bar inserting step. The joint of the iron core in which the second core member is inserted in the core inserting step is pressed by the second pressurizing ram from the side opposite to the second core member, and the joint of the iron core is separated from the joint. Two
And a second pressing ram to clamp and stop the joint portion, and the leg portion of the iron core whose joint portion is stopped by the joint portion pressing step is connected to the second addition member. A leg pressurizing step of pressurizing and compressing by the pressurizing ram from a direction substantially orthogonal to the pressurizing direction of the press ram, and a second core for extracting the second core from the iron core compressed by the leg pressurizing step. The method of treating a transformer according to claim 2 or 3, further comprising a core-metal removing step. 5. The pressurizing step comprises: after the mandrel removing step or after the second mandrel removing step, the iron cores are separated from each other by the pressure ram and the second pressure ram. The method for treating a transformer according to any one of claims 2 to 4, further comprising a compression stroke in which pressure is applied from two directions substantially orthogonal to each other.