JP5046772B2 - Iron core cutting device and iron core cutting method - Google Patents

Description

  The present invention relates to an iron core cutting device and an iron core cutting method for cutting a laminated iron core used in a transformer or the like.

  Polychlorinated biphenyl (hereinafter abbreviated as PCB) is a substance that has properties such as being chemically stable, difficult to decompose by heat, excellent electrical insulation, high boiling point, and nonflammability. . For this reason, in a wide range of fields, such as transformers, ballasts, switches, instrument transformers, capacitors, surge absorbers, circuit breakers, rectifiers, discharge coils, insulating oils used for reactors, heating media for boilers and heat exchangers, etc. Have been used. In Japan, about 59,000 tons of PCBs have been produced so far, of which about 54,000 tons have been used domestically (for example, Non-Patent Document 1).

  However, in recent years, the toxicity of PCBs to the human body has been clarified, and new manufacturing of PCBs has not been made in Japan since 1972. Furthermore, based on the “Law Concerning the Examination and Regulation of Chemical Substances” enacted in 1973, its production, importation, etc. were virtually prohibited from 1974. Since then, in Japan, PCB waste including high-voltage transformers and high-voltage capacitors has not been disposed of over a long period of time and has been stored by business operators because the preparation of the treatment system has been stagnant. In the prospect of such disposal is long-term storage is to continue without stand, the loss or the like occurs in the PCB waste, it has become a situation in which the progress of the environmental pollution is a concern.

  Therefore, the “Special Measures Law Concerning Promotion of Proper Treatment of Polychlorinated Biphenyl Waste” was enforced in 2001 and obligated to dispose of PCBs and waste oils containing PCBs within 15 years (for example, Non-Patent Document 1).

  Various conventional PCB processing methods have been proposed. Representative examples include dechlorination decomposition method, hydrothermal oxidation decomposition method, reductive thermal decomposition method, photolysis method, plasma decomposition method, etc. There is. However, as a step before processing the PCB itself, it is necessary to disassemble a device using the PCB for each member. For example, Patent Document 1 discloses a method for disassembling and cleaning a transformer containing PCB-mixed insulating oil.

  According to Patent Document 1, first of all, an oil draining process for removing PCB-mixed insulating oil from a transformer containing PCB-mixed insulating oil, and then circulating by introducing a cleaning solvent into the drained transformer. Immersion / circulation cleaning process for cleaning and removing the insulating oil, rough dismantling process for roughly disassembling the transformer to a size that can be put into a cleaning device, a primary cleaning process for performing primary cleaning by the dismantling unit, the dismantling unit as a case, metal, A device using PCB through a disassembly process of separating and disassembling each of alumina, insulator, electric wire, laminated iron core (core), wood, packing and other members, and a secondary cleaning process of secondarily cleaning each separated member. It is said that each member can be disassembled and cleaned.

  Among these members, the laminated iron core has a structure in which a steel plate is laminated in a ring shape. In such a state, it is difficult to clean and remove the PCB between the laminated steel plates. Therefore, by cutting such a laminated iron core in the laminating direction, the annularly wound state is unwound, and it is transformed into a state in which it is easy to remove PCBs and the like adhering between the steel plates, and washing and other processing It is necessary to make it possible to proceed.

Therefore, Patent Document 2 describes an iron core cutting method / apparatus having a jig for pressing the upper and lower portions of the core disposed in the inner hollow portion of the annular laminated iron core from the horizontal direction. According to Patent Document 2, the iron core supported by the core pressed by the jig is sandwiched between the core and the cutting blade, and the iron core is cut.
JP 2006-334572 A JP 2003-285224 A Ministry of the Environment “Polychlorinated biphenyl waste disposal basic plan” <Internet URL http://www.env.go.jp/recycle/poly/plan/180320.pdf>

  However, as described in Patent Document 2, it is not possible to stably fix the core simply by applying a horizontal force to the core and pressing the core, and the core is lifted up. The jig that holds it down will be damaged. In addition, when the core is lifted, the laminated iron core is deformed or misaligned, bias pressure acts on the cutting blade, and the laminated iron core may not be cut well. Further, since the core is not stable, the core and the cutting blade come into contact with each other, and as a result, the cutting blade may be damaged.

  Then, when the technique only fixed to a horizontal direction like patent document 2 was observed in detail, a mode that force was escaping to the perpendicular direction of the core was seen. Such dispersion of force in the vertical direction is considered to cause the above problems.

  In view of such problems, an object of the present invention is to provide an iron core cutting device and an iron core cutting method capable of cutting a laminated iron core more stably than in the prior art.

In order to solve the above-described problem, an iron core cutting device according to the present invention cuts a laminated iron core from the outer side of the laminated iron core toward the core, and a core disposed in the inner hollow portion of the annular laminated iron core. vertical and cutting blade, is laminated iron core in addition to the core the vertical direction of the force to the direction to be cut is fixed by pressing the core against the table core is placed to And fixing means.

The configuration mentioned above, the core and, with respect to the direction of lamination iron core is cut can be suppressed to vertical direction, the vertical direction can prevent the force is dispersed, can be more reliably cut the iron core .

The vertical locking means described above, is pressed against the core with respect to the table core is placed. Thereby , a laminated iron core can be simply fixed by pinching | interposing a core from the upper and lower sides along the perpendicular direction where gravity acts with a table and a vertical fixing means.

The vertical locking means described above has a focus match fitting portion on the upper end portion of the core, may the fitting portion by fitting the upper end portion of the core is pressed against the core. Thereby, the vertical fixing means and the core are fitted, and the core can be stably fixed without the vertical fixing means being detached from the core.

  The iron core cutting device described above may further include an opposing pressing member that presses the core by applying a force in a direction opposite to the direction in which the laminated iron core is cut to the core. Thereby, an iron core can be pinched | interposed with a core and a cutting blade, and an iron core can be more stably cut | disconnected.

In order to solve the above-mentioned problems, the iron core cutting method according to the present invention arranges the laminated iron core so that the core is positioned in the inner hollow portion of the annular laminated iron core, and the outer side of the laminated iron core. a vertical fixing step in the direction toward the core by adding vertical direction of the force to the core, to fix by pressure the core on a table that core is placed from the outside of the laminated iron core And a cutting step of cutting the laminated iron core from the core toward the core.

  According to the present invention, since the core can be firmly fixed at the time of cutting the laminated iron core, the stability of the laminated iron core supported by the core is increased, and the efficiency of the cutting operation of the laminated iron core is improved. In addition, the working pressure on the cutting blade can be reduced, and the damage on the cutting blade is also reduced. Furthermore, damage and deformation of the facing pressing member facing the cutting blade can be suppressed.

  Next, with reference to an accompanying drawing, an embodiment of an iron core cutting device and an iron core cutting method by the present invention is described in detail. In the figure, elements not directly related to the present invention are not shown. Similar elements are denoted by the same reference numerals.

  FIG. 1 is a schematic view of an iron core cutting device according to an embodiment of the present invention. The iron core cutting device 100 has a turntable 120 that can rotate in a horizontal plane on a work setting unit 110 that serves as a work table. The turntable 120 changes the position of the laminated iron core 130 placed thereon by rotating in a horizontal plane. Note that the laminated iron core 130 actually surrounds the core 140, but in FIG. 1, only the cross section of the laminated iron core 130 is indicated by a one-dot chain line. This is for clarity of illustration of the other elements. Hereinafter, in the present application, when the laminated iron core 130 is illustrated by a one-dot chain line, it is all the same as described above.

  FIG. 2 is a schematic view of the laminated iron core 130 shown in FIG. The laminated iron core 130 taken out by disassembling a used transformer has an annular structure in which steel plates are laminated. As types of laminated iron cores, C-type iron cores, wrap iron cores, and wound iron cores are generally known. The C-type iron core is obtained by fixing two semi-annular iron cores that have been cut after being continuously wound and molded with a varnish or the like. The wrap iron core is formed by winding a steel plate one by one so that the seam is in the same position (within a certain range, not the same position). The wound iron core is formed by winding a steel plate every several turns, and the joints of the steel plates are scattered all around the iron core or within a specific position range.

  The laminated iron core 130 used in the present embodiment may be any of the above-described laminated iron cores, but any of the laminated iron cores has an annular structure in which steel plates are laminated. Then, it is difficult to remove harmful substances such as PCB between steel plates. Therefore, it is necessary to first separate and cut the laminated iron core 130 in which steel plates are laminated in an annular shape.

  FIG. 3 is a plan view of the laminated iron core shown in FIG. When cutting the laminated iron core 130, as shown in FIG. 3, a core 140 made of metal or the like is disposed in the inner hollow portion of the annular laminated iron core 130. The core 140 supports the laminated iron core 130 at the time of cutting and prevents the laminated iron core 130 from being deformed.

  FIG. 4 is a plan view showing a state in which the laminated iron core 130 is installed on the turntable 120 of FIG. When installing the laminated iron core 130, the core 140 is inserted into the inner hollow portion of the annular laminated iron core 130 placed on the turntable 120, and the core 140 is inserted into the groove 142 provided in the turntable 120. Is preferably fitted and fixed.

  As shown in FIG. 4, the iron core cutting device 100 applies a force in a direction opposite to the arrow 150 direction (the moving direction of the cutting blade 170) in which the laminated iron core 130 is cut, to the core 140. It further includes an opposing pressing member 160 for pressing. As shown in FIG. 1, the opposing pressing member 160 has a substantially C shape, and a lower pressing portion that presses the lower side of the core 140 through a groove 142 at the lower end of the C shape. The upper pressing portion 160B that presses the upper side of the core 140 is provided at the upper end portion of the C-shape having 160A and straddling the laminated iron core 130. The lower pressing portion 160A and the upper pressing portion 160B are provided substantially in parallel.

  When cutting the laminated iron core 130, the opposing pressing member 160 is driven along the groove 142 by the opposing pressing member driving device 180 shown in FIG. 1. Accordingly, the lower pressing portion 160A can press the lower side of the core 140 while being accommodated in the groove 142, and the upper pressing portion 160B can press the upper side of the core 140.

  In this manner, the lower side and the upper side of the core 140 are pressed by the lower pressing portion 160A and the upper pressing portion 160B of the opposing pressing member 160, respectively, in the opposite direction, that is, from the outside of the laminated iron core 130. The cutting blade 170 is driven by the cutting blade driving device 190 to cut the laminated iron core 130.

  After cutting, the lower pressing portion 160A and the upper pressing portion 160B are moved out of the turntable 120 along the groove 142 by the opposing pressing member driving device 180. Further, the cutting blade 170 is returned to the original position by the cutting blade driving device 190.

  Next, when cutting the portion of the laminated iron core 130 that faces the portion cut at the beginning, the turntable 120 may be rotated 180 ° and the same operation as described above may be repeated. Thus, the laminated iron core 130 is cut at portions facing each other and divided into two semi-annular iron cores.

  However, the core 140 cannot be stably fixed only by applying a horizontal force to the core 140 and pressed, and the cutting blade 170 may be biased and cannot be cut well. In addition, the cutting blade 170 may be damaged.

  Therefore, in the present embodiment, as shown in FIG. 1, the iron core cutting device 100 further applies a force in a direction perpendicular to the direction in which the laminated iron core 130 is cut to the core 140 to cause the core 140 to move. A vertical fixing means for fixing, for example, a vertical fixing member 200 is included.

  The vertical fixing member 200 can be driven in the vertical direction by an air cylinder 220 to which the vertical fixing member 200 is connected. The means for driving the vertical fixing member 200 is not limited to the air cylinder 220, and any driving means such as an electric motor such as a hydraulic cylinder or a stepping motor may be used.

  The iron core cutting device 100 includes a camera 230 fixed to the upper part of the device, and can photograph the state of the cutting of the laminated iron core 130. However, the camera 230 does not interfere with the driving area of the air cylinder 220. It is slightly shifted from the upper part of the air cylinder 220 to the side where the cutting blade 170 is provided.

  An anti-vibration rubber 250 that absorbs vibration generated by driving the air cylinder 220, the opposing pressing member 160, and the cutting blade 170 is attached to the bottom of the fixture 240 that fixes the camera 230 to the iron core cutting device 100. This prevents the image obtained by photographing the cutting state from being disturbed.

  FIG. 5 is a view showing a state in which the laminated iron core 130 is cut using the vertical fixing member 200 shown in FIG. As shown in FIG. 5, before or after pressing the core 140 by the opposing pressing member 160, the vertical fixing member 200 is driven downward by the air cylinder 220 as indicated by the arrow 192, and the vertical fixing member 200 is the upper end portion of the core 140. And the core 140 is pressed against the turntable 120 to prevent the core 140 from overturning.

  In the present embodiment, the vertical fixing member 200 presses the core 140 against the turntable 120 on which the core 140 is placed. That is, the laminated iron core 130 is simply fixed by sandwiching the core 140 from above and below along the vertical direction in which gravity acts, between the turntable 120 and the vertical fixing member 200.

  Thus, the core 140 can be more firmly fixed by pressing the core 140 in the direction of the arrow 192 substantially perpendicular to the direction in which the laminated core 130 is cut. Thereby, when driving the cutting blade 170 to cut the laminated iron core 130, it is possible to prevent the force from being dispersed in the vertical direction. Therefore, according to the present embodiment, the laminated iron core 130 can be cut more stably without causing deformation or misalignment of the laminated iron core 130.

  As shown in FIG. 1, the direction in which the vertical fixing member 200 applies a force to the core 140 is typically a vertical direction, which is simple and typical. However, the vertical fixing member 200 only needs to apply a force in a direction substantially perpendicular to the direction in which the laminated iron core 130 is cut, and this “substantially perpendicular direction” is limited to the vertical direction. It is not something that can be done. Depending on the direction in which the laminated iron core 130 is cut (the moving direction of the cutting blade 170) and the manner in which the turntable 120 is installed, a book is applied so that force is applied in various directions from the vertical fixing member 200 to the core 140. Embodiments of the invention can be modified.

  6 is an AA cross-sectional view of FIG. 1, and FIG. 7 is an enlarged view of the vertical fixing member 200 shown in FIG. As shown in FIG. 7, the vertical fixing member 200 has a fitting portion 200 </ b> A that substantially matches the upper end portion of the core 140, and the fitting portion 200 </ b> A is fitted to the upper end portion of the core 140. The core 140 is pressed. Thereby, the vertical fixing member 200 and the core 140 are fitted well, and the core 140 can be stably fixed without the vertical fixing member 200 being detached from the core 140.

  In addition, although illustration is abbreviate | omitted, 200 A of fitting parts of the vertical fixing member 200 are good also as a structure which can change a width | variety using a screw | thread or other members and can fasten the upper end part of the core 140 from both sides. Thereby, the vertical fixing member 200 can fix the core 140 more firmly.

  As shown in FIG. 6, when cutting the laminated iron core 130, two iron core fixing members 260A and 260B each holding the laminated iron core 130 itself (four in total. In FIG. 6, one by two in total). May be provided). The member 260B is an air cylinder, and the laminated iron core 130 is pressed against and fixed to the other member 260A when the member 260B protrudes.

  Although the laminated iron core 130 can be firmly pressed down if it is fixed using the air cylinder member 260B as described above, this is not essential, and four plate-like shapes are provided at positions corresponding to a total of four members 260A and 260B. If this member is fixed and arranged, the laminated iron core 130 can be pressed sufficiently stably.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  The present invention is applicable to an iron core cutting device and an iron core cutting method for cutting a laminated iron core used for a transformer or the like.

It is the schematic of the iron core cutting device which is embodiment of this invention. It is the schematic of the laminated iron core shown in FIG. It is a top view of the laminated iron core shown in FIG. It is a figure which shows a mode that the laminated iron core was installed on the turntable of FIG. It is a figure which shows a mode that a laminated iron core is cut | disconnected using the vertical fixing member shown in FIG. It is AA sectional drawing of FIG. It is an enlarged view of the vertical fixing member shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Iron core cutting device 110 Work installation part 120 Turntable 130 Laminated iron core 140 Core 160 Opposite holding member 170 Cutting blade 200 Vertical fixing member 220 Air cylinder

Claims (3)

A core disposed in an inner hollow portion of an annular laminated iron core;
A cutting blade for cutting the laminated iron core from the outside of the laminated iron core toward the core;
An opposing pressing member that presses the core by applying a force in a direction opposite to the direction in which the laminated iron core is cut;
By applying a force of a vertical direction with respect to the direction in which the laminated iron core is cut to the core, vertical fixing of fixing by pressure contact with the tang on a table that the core is placed Means for cutting an iron core. The vertical locking means has an upper end in engagement match fitting portion of the core, characterized by pressing a tang by fitting the fitting portion on the upper end of the core The iron core cutting device according to claim 1 . An iron core arrangement step of arranging the laminated iron core so that the core is positioned in the inner hollow portion of the annular laminated iron core;
An opposing pressing step of pressing the core by applying a force in a direction opposite to the direction in which the laminated iron core is cut;
Adding vertical direction of the force from outside in the direction toward the core of the laminated iron core in the core is fixed by pressing the tang against a table in which the core is placed A vertical fixing process;
A cutting step of cutting the laminated iron core from the outside of the laminated iron core toward the core.

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