JP4212719B2 - Winding core disassembly method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wound iron core disassembling method for disassembling a wound iron core used for static induction electrical equipment such as a transformer for recycling, and a disassembling apparatus used for implementing the disassembling method.
[0002]
[Prior art]
Conventionally, when recycling oil-filled transformers, after removing the transformer body from the tank, place the transformer in an incinerator and incinerate the insulation and insulation oil, and collect the remaining coil conductor and iron core as valuable resources. I was trying to do it.
[0003]
[Problems to be solved by the invention]
In recycling an oil-filled transformer, it is not preferable to incinerate the transformer because toxic gas is generated from the insulating oil and pollutes the atmosphere. In order to recycle the transformer without incineration, it is necessary to first perform a cleaning operation for removing the insulating oil from the transformer.
[0004]
Since the iron core used in the transformer has a structure in which steel strips are laminated, the insulating oil penetrates into the iron core used in the oil-filled transformer. Therefore, even if the iron core is washed as it is, the insulating oil adhering to the steel strip cannot be completely removed. In order to completely remove the insulating oil from the steel strip constituting the iron core, it is necessary to separate the steel strips constituting the iron core one by one and then wash them.
[0005]
Therefore, in order to recycle the transformer, it is necessary to dismantle the iron core. However, if the iron core is dismantled manually, the operator is undesirably contaminated by the insulating oil. Especially when PCB is contained in insulating oil, the iron core cannot be dismantled by hand. Therefore, pole transformers in the era when insulating oil containing PCB was used were not recycled. It is currently stored in
[0006]
In order to proceed with the recycling of oil-filled transformers, it is necessary to first separate the wound iron core into steel strips, and then cut, wash, and dry the separated steel strips. When insulating oil containing PCBs and other poisons is used in electrical equipment to be recycled, it is necessary to perform all steps from disassembly of the wound core to cleaning without using human hands. Since the steel strip separated from the wound core is in a curved state, it is difficult to transport the steel strip by a conveyor or handle it by a machine. In particular, when cutting steel strips, it is necessary to supply the cutting strip with the orientation of the steel strip constant, but it is difficult to transport the curved steel strip with the orientation fixed and supply it to the cutter. It is.
[0007]
The object of the present invention is to provide a steel strip obtained by disassembling a wound iron core used in a static induction electrical device such as a transformer, so that it can be supplied to the next process with almost no bending, It is an object of the present invention to provide a method for disassembling a wound iron core and a disassembling apparatus used for carrying out the dismantling method so that the steel strip can be easily handled.
[0008]
[Means for Solving the Problems]
In the disassembling method according to the present invention, a steel strip separating step for separating the steel strip constituting the wound iron core, and forming a fold along the longitudinal direction of the steel strip by press forming the separated steel strip. A steel strip forming step is performed.
[0009]
As described above, by forming a crease along the longitudinal direction of the steel strip by press forming the separated steel strip, it is possible to correct the bending of the steel strip and make it almost straight. The steel strip can be easily handled when cutting and the like.
[0010]
In the steel strip separation process, the wound iron core and the steel strip feeding roller are rotated in the same direction with the wound core fixed to the turntable and the steel strip feeding roller pressed against the outer periphery of the wound core. It is preferable to separate the steel strips constituting the steel.
[0011]
As described above, with the steel strip feeding roller pressed against the outer periphery of the wound core, when the wound core and the steel strip feeding roller are rotated in the same direction, among the steel strips constituting the wound core, Since the forces toward the opposite sides of the circumferential direction work between the outermost steel strip in contact with the belt feed roller and the steel strip inside it, in order from the outermost steel strip in contact with the steel strip feed roller Separated from the wound core, the core is dismantled.
[0012]
According to the above method, since the core can be mechanically dismantled without touching the wound iron core, the dismantling operation can be performed even for the wound iron core to which insulating oil including PCB is attached. Can proceed safely.
[0013]
A dismantling apparatus used for carrying out the above wound core disassembling method includes a turntable having a holding surface for holding the wound core to be disassembled, an iron core fixing mechanism for fixing the wound core to the holding surface of the turntable, A turntable drive mechanism for rotating the table, and a steel strip feed roller provided to rotate about an axis parallel to the rotation axis of the turntable and brought into contact with the outer peripheral surface of the wound core held by the turntable A roller urging means for urging the steel strip feeding roller to the outer peripheral side of the wound core, a feeding roller driving means for rotating the steel strip feeding roller in the same direction as the turntable, and with the rotation of the turntable and the feeding roller A steel strip forming apparatus that press-forms a steel strip separated from the wound core and forms a fold along the longitudinal direction of the steel strip. More can be configured.
[0014]
The dismantling device includes a separated steel strip guide means for guiding a steel strip separated from the wound core in accordance with the rotation of the wound core and the steel strip feed roller in a predetermined direction, and the separated steel strip guide means. It is preferable to further provide a steel strip take-up device that takes the steel strip taken out and sends it in a direction away from the wound iron core fixed on the turntable.
[0015]
As described above, if the steel strip guide means and the steel strip take-up device are provided, the steel strip separated from the wound core can be sent out in a certain direction and pulled away from the wound core. Work can proceed smoothly.
[0016]
The steel strip forming apparatus includes first and second press dies arranged opposite to each other, and a pair of rollers facing each other through windows provided in the first and second press dies, respectively. A steel strip retracting device that sandwiches a steel strip fed by the apparatus between a pair of rollers and retracts between the first and second press dies, and a press die driving device that drives the first and second press dies. Can be configured.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an exploded perspective view showing an example of the structure of a transformer in which a wound iron core to be disassembled by the disassembly method of the present invention is used. In the figure, 1 is a wound core formed by winding and laminating silicon steel strips, 2 and 2 are coils fitted to the left and right legs of the wound core 1, and each coil 2 is a primary coil (high voltage coil). ) 2a and a secondary coil (low voltage coil) 2b.
[0018]
In FIG. 1, 3 and 4 are upper and lower yoke fasteners for fastening the upper yoke portion and the lower yoke portion of the iron core 1, respectively, and 5 are outer peripheries of the left and right legs of the wound iron core 1. It is an iron band that tightens the upper yoke fastening bracket 3 and the lower yoke fastening bracket 4 in a direction to draw each other through the coil 2.
[0019]
6 is a terminal plate attached to the upper yoke fastening bracket 3, 7 is an insulating plate inserted between the upper yoke fastening bracket 3 and the laminated surface of the upper yoke portion of the wound core, and 8 is a lower yoke fastening. An insulating plate inserted between the metal fitting 4 and the laminated surface of the lower yoke portion of the wound core, 9 is an insulating plate inserted between the yoke portion of the wound core and the end surface of the coil, and 10 and 11 are respectively An insulating plate 12 is inserted between the outer periphery of the upper yoke portion of the wound core and the upper yoke fastening bracket 3 and between the outer periphery of the lower yoke portion and the lower yoke fastening bracket 4, and 12 is the outer periphery of the coil and illustrated The insulating plates 7 to 12 are made of a press board or the like. The transformer shown in FIG. 1 is accommodated in a tank (not shown) together with insulating oil.
[0020]
The wound iron core disassembling method according to the present invention is a method of disassembling the wound iron core 1 when recycling the transformer as shown in FIG. Hereinafter, a configuration example of a disassembling apparatus used for carrying out the disassembling method according to the present invention will be described with reference to FIGS. 2 to 4 together with a configuration of a main part of an iron core recycling facility.
[0021]
2 is a perspective view of a main part of a recycling facility in which the dismantling apparatus according to the present invention is used, FIG. 3 is a top view of the main part of the dismantling apparatus, and FIG. 4 is a cross-sectional view taken along line AA in FIG.
[0022]
In the recycling facility shown in FIG. 2, the steel strips constituting the wound core 1 are separated one by one or plural pieces, the wound core is disassembled, and then the separated steel strips are cut into chips. The insulating oil adhering to the steel strip is removed by washing the strip.
[0023]
FIG. 2 shows a dismantling device 15 for disassembling the wound iron core by separating one or more steel strips 1a constituting the wound iron core 1 from the recycling equipment, and a steel strip obtained from the dismantling device 15 A conveying device 16 that conveys the steel strip in one direction and a cutting device 17 that cuts the steel strip conveyed by the conveying device 16 are shown.
[0024]
2 to 4 show a steel strip separating device 15A for separating the steel strip 1a from the wound core 1, and the steel strip separated by the steel strip separating device 15A in FIG. It comprises a forming device 15B for forming a steel strip 1a 'having a cross-sectional shape like this and forming a crease in the steel strip.
[0025]
2 to 4, reference numeral 20 denotes a turntable disposed with its plate surface oriented in the horizontal direction. The turntable 20 has at least three support rollers 21 abutted against the outer peripheral portion of the lower surface thereof. (Refer to FIG. 4) and a rotating shaft 22 attached to the central portion of the lower surface thereof are rotatably supported. The support roller 21 is attached to a support 23 supported by a frame (not shown), and the rotary shaft 22 is supported by a frame (not shown) via a bearing. A large gear 24 is attached to the lower surface of the turntable 20 with its axis line coincided with the center axis line of the turntable 20 and the rotary shaft 22. Further, a small gear 26 attached to a rotation shaft of an electric motor 25 supported by a frame (not shown) is engaged with the large gear 24, and the turntable 20 is rotationally driven by the electric motor 25 via a speed reduction mechanism including the gears 26 and 24. It is like that. In this example, the electric motor 25 and the gears 24 and 26 constitute a turntable drive mechanism.
[0026]
On the turntable 20, iron core clamps 27, 27 that can adjust the distance between them by an expansion / contraction mechanism (not shown) are attached. The wound iron core 1 to be disassembled is arranged on the turntable 20 with its center substantially aligned with the center of the turntable 20 and with the iron core clamps 27 and 27 positioned inside the window portion. Then, the inner periphery of the leg portion of the wound iron core 1 is moved by displacing the iron core clamps 27 and 27 in a direction away from each other by an expansion / contraction mechanism (mechanism for enlarging or reducing the interval between the iron core clamps 27 and 27). The wound iron core 1 is fixed on the turntable 20 with both clamps. An iron core fixing mechanism for fixing the wound iron core on the turntable is constituted by the iron core clamps 27 and 27 and an expansion / contraction mechanism (not shown) that displaces both clamps.
[0027]
A fluid pressure cylinder (preferably an air cylinder) 28 is also attached to a frame (not shown) with its axis line aligned with the radial direction of the turntable 20 and with its piston rod 28a facing the turntable side. A roller drive shaft 30 extending in parallel with the rotation shaft 22 of the turntable 20 is rotatably supported on a bracket 29 fixed to the tip of the piston rod 28a of the cylinder 28. An electric motor 31 is also attached to the bracket 29, and the roller drive shaft 30 is rotationally driven by the electric motor 31 directly or via a speed reducer. The roller drive shaft 30 is attached with a pair of steel strip feed rollers 32, 32 arranged at an interval in the axial direction of the turntable. The motor 31 and a speed reducer provided as necessary to decelerate the rotation of the motor constitute feed roller driving means for rotating the steel strip feed roller 32 in the same direction as the turntable 20.
[0028]
The steel strip feed rollers 32, 32 are driven by the cylinder 28, and as shown in the drawing, there are an action position that abuts the outer peripheral surface of the wound core 1 on the turntable, and a retracted position that is separated from the wound core. It can be displaced along the radial direction of the turntable. When disassembling the wound core, the steel strip feed rollers 32, 32 are arranged at the operating positions as shown in the figure and are pressed against the outer periphery of the wound core 1 on the turntable by the urging force of the cylinder 28. In this example, the cylinder 28 constitutes roller urging means for urging the steel strip feeding roller 32 toward the outer peripheral side of the wound core 1.
[0029]
The steel strip feeding roller 32 is composed of a magnet roller or a roller with a spike having a spike attached to the outer periphery, and when driven by the electric motor 31 while being pressed against the outer periphery of the wound iron core, Even when insulating oil adheres to the surface, it is considered to roll while contacting the outer peripheral surface of the wound core 1 with almost no slip between the steel strip.
[0030]
As the steel strip feeding roller, a metal roller having a non-slip process such as a knurling process on the outer peripheral surface can also be used.
[0031]
When disassembling the wound core 1, the turntable 20 (the wound core 1) and the steel strip feeding roller 32 are rotated in the same direction with the steel strip feeding roller 32 pressed against the outer periphery of the wound core 1. In the illustrated example, the turntable 20 and the steel strip feed roller 32 are rotated clockwise as viewed from above.
[0032]
When the wound core 1 and the steel strip feeding roller 32 are rotated in the same direction, the circumferential direction between the outermost steel strip 1a of the wound core 1 in contact with the steel strip feeding roller 32 and the inner steel strip is mutually circumferential. Therefore, the steel core 1 is separated from the wound core 1 in order from the outermost steel strip 1a in contact with the steel strip feed roller 32, and the core 1 is disassembled.
[0033]
In addition, although the thing of various structures is used as a wound iron core, this invention is applicable also to the wound iron core of any structure. FIGS. 6 (A) to 6 (C) show various wound core structures. FIG. 6 (A) shows a steel strip cut by one turn, and both ends of the steel strip 1a of each turn are connected to the core. 1 shows a one-turn cut type wound core that is lap joined (overlap joined) with a yoke part. FIG. 6B shows a one-turn cut type wound core having a structure in which the steel strip is cut one turn at a time and both ends of the steel strip 1a of each turn are butt-joined (butt joined). . Further, FIG. 6C shows a two-turn cut type wound core having a structure in which the steel strip 1a is cut by two turns and sequentially laminated.
[0034]
When placing the wound iron core on the turntable, it is necessary to determine which laminated surface of the wound iron core is directed upward depending on how the steel strip constituting the wound iron core is wound. is there. That is, when disassembling a wound core in which both ends of each steel strip are lap-joined as shown in FIG. 6 (A) or a two-turn cut type wound core as shown in FIG. 6 (C), Since it is necessary to rotate the iron core in the same direction as the winding direction of the steel strip, the winding direction of the steel strip constituting the wound core 1 and the rotation direction of the turntable 20 (winding core) and the steel strip feed roller 32 Are arranged with the predetermined laminated surface of the wound iron core 1 facing upward. When disassembling a bat-joined wound iron core as shown in FIG. 6B, the steel strip can be separated by rotating the wound iron core in any direction, so the orientation of the laminated surface of the wound iron core It doesn't matter.
[0035]
In addition, here, the winding direction of the steel strip of the wound core is the winding of each steel strip at the end portion of each of the steel strips that are sequentially laminated from the inner peripheral side to the outer peripheral side of the wound core 1. It means the winding direction of each steel strip when it is set as the starting end portion of. In the wound core 1 shown in FIG. 6 (A) and the wound core 1 shown in FIG. 6 (C), each steel strip is wound in the clockwise direction when viewed from above (the front side of the page).
[0036]
A steel strip take-up device 35 is disposed on the side of the turntable 20 in a state of being positioned in the vicinity of the steel strip feed roller 32. This steel strip take-up device includes a support base 36 fixed to a frame (not shown), a feed roller 37 supported by the support base 36 via an axis parallel to the rotation axis of the turntable 20, and a frame (not shown). The pressure roller 39 supported by a bracket provided at the tip of the piston rod of the fixed cylinder 38 via an axis parallel to the rotation axis of the turntable, and the feed roller 37 are rotationally driven using an electric motor as a drive source. The driving mechanism is not shown.
[0037]
The pressure roller 39 is driven by the cylinder 38 in the X1 direction and the X2 direction and is in contact with the feed roller 37, and is separated from the feed roller 37 as shown in FIG. It is displaced between the retracted position.
[0038]
The support 36 also includes a first guide member 40 that extends from the vicinity of the pressure roller 39 to the vicinity of the steel strip feed roller 30 and a second guide that extends from the vicinity of the feed roller 37 to the vicinity of the outer periphery of the wound core 1 on the turntable. The guide member 41 is attached. In the state where the first guide member 40 and the second guide member 41 are formed in a plate shape and are inclined so that the distance between them increases toward the steel strip feeding roller 30 and the wound core 1 side, And it is provided in the state which does not contact the turntable 20. Curved portions 40 a and 41 a that are curved outward are formed at the respective distal end portions of the guide members 40 and 41, and the steel strip 1 a separated from the wound core 1 by the rotation of the wound core 1 and the steel strip feed roller 30. Is guided toward the feeding roller 37 and the pressure roller 39 through the guide members 40 and 41. The separated steel which guides the steel strip 1a separated from the wound core 1 with the rotation of the wound core 1 and the steel strip feed roller 32 by the first guide member 40 and the second guide member 41 in a predetermined direction. Band guide means is configured.
[0039]
The guide members 40 and 41 are not necessarily formed in a plate shape, and may be formed in other shapes such as a rod shape or a pipe shape.
[0040]
In the illustrated steel strip take-up device 35, when the wound iron core is disassembled, the pressure roller 39 is brought into contact with the feed roller 37, and the feed roller 37 is rotated by a drive mechanism (not shown). The The feeding roller 37 and the pressure roller 39 are sent out in a direction in which they are separated from the wound core 1 with the steel strip 1a being separated from the wound core 1 and guided through the guide members 40 and 41 therebetween.
[0041]
In this example, a turntable 20, a turntable drive mechanism composed of gears 24, 26 and an electric motor 25, an iron core clamp 27, 27, an electric motor 31, a steel strip feed roller 32, and a separated steel composed of guide members 40, 41. A steel strip separating device 15 </ b> A is configured by the strip guide means and the steel strip take-up device 35 provided with the feeding roller 37 and the pressure roller 39.
[0042]
A steel strip forming device 15B is arranged on the outlet side of the steel strip separating device 15A (the outlet side of the steel strip take-up device 35). The steel strip forming apparatus includes first and second press dies arranged opposite to each other, and a pair of rollers facing each other through windows provided in the first and second press dies, respectively. Steel strip drawing device for pulling steel strip fed by take-off device between said pair of rollers and drawing between said first and second press dies, and press die driving device for driving first and second press dies And comprising.
[0043]
The illustrated steel strip forming apparatus 15B is driven by a fluid pressure cylinder 50 and is displaced in the same direction (X1, X2 direction) as the steel strip feed roller 32, and is fixed to the steel strip holding table 51. The first press die 52, the direction driven by the fluid pressure cylinder 53 to approach the first press die 52 (X1 direction), and the direction retracted from the first press die 52 (X2 direction). The second press die 54 to be displaced, the pressure roller 55 disposed in the window portion 52 a provided in the first press die 52, and the window portion 54 a provided in the second press die 54. A feeding roller 56 disposed and opposed to the pressure roller 55, a spring 57 that biases the pressure roller 55 toward the feeding roller 56, and a drive source 58 that rotationally drives the feeding roller 56. ing. In the illustrated example, two pressure rollers 55 are provided at intervals in the longitudinal direction of the first press die 52, and two feed rollers 55 and 55 are respectively opposed to the two pressure rollers 55 and 55. Feed rollers 56 are provided at intervals in the longitudinal direction of the second press die 54.
[0044]
Each of the first press die 52 and the second press die 54 has a die surface with a cross-sectional cross-section, and both the steel strips are positioned between the die surfaces of the press dies 52 and 54. By displacing the press dies in a direction approaching each other, the steel strip is press-formed into a cross-sectional shape as shown in FIG. 5 and creased along its longitudinal direction.
[0045]
In the illustrated example, a pair of rollers including a feeding roller 56 and a pressure roller 55, a drive source 58 that drives the feeding roller 56, and a spring 57 that biases the pressure roller 55 toward the feeding roller 56 side. Thus, a steel strip retraction device is constructed in which the steel strip 1a fed by the steel strip take-up device 35 is sandwiched between the pair of rollers 55 and 56 and drawn between the first and second press dies 52 and 54. ing.
[0046]
A steel strip sensor 60 is disposed on the inlet side of the steel strip forming apparatus 15B. The illustrated steel strip sensor includes a light emitting device 60a disposed in the vicinity of an end portion on the entrance side of the steel strip forming device 15B so as to face each other with a passage of the steel strip supplied to the steel strip forming device in between. It consists of a light receiver 60b. The light receiver 60b is provided with a photoelectric switch that changes the state (on state or off state) between when the light from the light emitter 60a is received and when the light is not received. Information on whether or not the steel strip 1a exists at the entrance of the forming apparatus 15B is given.
[0047]
In the steel strip forming apparatus 15B described above, when the steel strip 1a is separated from the wound core 1, the first press die 52 and the second press die 54 are arranged with a predetermined gap therebetween, and are fed. Pressure rollers 55 and 55 are brought into contact with the supply rollers 56 and 56, respectively. The feeding roller 56 is separated from the wound core 1 by the steel strip sensor 60 and the steel strip 1a taken up by the steel strip take-up device 35 is interposed between the first press die 52 and the second press die 54. It is driven when it is detected that the steel strip has been fed, and when the steel strip sensor 60 detects the rear end of the steel strip 1a delivered from the steel strip take-up device 35 (the steel strip is the first and second presses). When fully introduced between molds 52 and 54).
[0048]
In the illustrated example, the spring 57 is used as the biasing means for biasing the pressure roller 55 toward the feeding roller 56, but a fluid pressure cylinder, an electromagnet, or the like may be used instead of this spring.
[0049]
The conveying device 16 is a known roller conveyor provided with a number of conveying rollers arranged side by side along the longitudinal direction, with one end 16a in the width direction positioned on the cylinder 50 side, and the longitudinal direction thereof being a steel strip. It arrange | positions in the state along the longitudinal direction of the shaping | molding apparatus 15B. The transport device 16 receives the steel strip 1a ′ formed by the first and second press dies 52 and 54 and transports it to the cutting device 17 side.
[0050]
In the steel strip forming apparatus 15B, the first and second press dies 52 and 54 are arranged at a predetermined interval, and the feeding roller 56 and the pressure roller 55 are applied with a predetermined pressing force. When brought into contact with each other, the steel strip holding table 51 is in a state capable of holding the steel strip by closing the lower end of the gap between the press dies 52 and 54, and the steel strip holding table 51 is in the first state by the cylinder 50. When the steel strip holding table 51 is retracted to the limit position together with the press die 54, the tip of the steel strip holding table 51 is retracted to a position near the one end 16a in the width direction of the transport device, and the steel strip on the backward holding table 51 is moved. The width dimension of the receding holding table 51 is set so as to allow it to fall on the transport device 16.
[0051]
The cutting device 17 receives the steel strip 1a ′ transported by the transport device 16 and puts a number of parallel slits along the longitudinal direction in the steel strip, and then cuts the steel strip in a direction crossing the slit. Chop the steel strip.
[0052]
Although not particularly shown, a position sensor for detecting the position of each movable part of the apparatus is provided at a necessary location, and a signal obtained from the position sensor and the steel strip sensor is input to a sequence control device, The cylinder and the electric motor are sequence-controlled by the control device so that a series of operations described later is performed.
[0053]
Hereinafter, the disassembling method of the present invention performed using the above wound iron core disassembling apparatus will be described together with a series of operations of the disassembling apparatus.
[0054]
When disassembling the wound core 1, the wound core 1 to be disassembled is first placed on the center of the turntable 20 with its laminated surface horizontal, and the wound core 1 is fixed on the turntable by the core clamps 27 and 27. To do.
[0055]
After fixing the wound iron core 1 on the turntable, the electric motor 25 is driven to rotate the turntable 20 holding the wound iron core 1 in the clockwise direction (in the same direction as the winding direction of the wound iron core). 32 is also rotated clockwise. Next, the piston of the cylinder 28 is advanced, and the steel strip feed roller 32 is pressed against the outer periphery of the wound iron core.
[0056]
At the same time, the cylinder 38 is driven to bring the pressure roller 39 into contact with the feed roller 37. Further, the first and second press dies 52 and 54 of the steel strip forming apparatus 15B are placed at a predetermined interval, and the lower end of the gap between the press dies 52 and 54 is closed by the steel strip holding table 51. In addition, the pressure roller 55 is brought into contact with the feeding roller 56 with a predetermined pressure.
[0057]
As described above, when the steel strip feeding roller 32 rotating in the same direction is pressed against the outer periphery of the rotating wound core 1, the steel strip positioned on the outermost periphery of the wound core and the steel strip positioned on the inner side thereof Since a force in the reverse direction acts between the two and the outermost one or two steel strips 1a, the wound steel core is separated. The separated steel strip 1a is supplied between the feeding roller 36 and the pressure roller 39 of the steel strip take-up device 35 through the guide members 40 and 41, and the separated steel strip 1a is fed to the steel strip by both rollers. It sends out to the molding apparatus 15B side.
[0058]
When the photoelectric sensor 60 detects the tip of the steel strip 1a fed from the steel strip take-up device 35 to the steel strip forming device 15B, the feeding roller 56 provided in the steel strip forming device 15B starts to be driven. The steel strip 1a fed to the steel strip forming apparatus 15B side is further fed by the feeding roller 56 and the pressure roller 55 to be positioned between the first and second press dies 52 and 54. When the rear end of the steel strip 1a is detected by the photoelectric sensor 60, the feeding roller 56 is stopped and the cylinder 38 is driven to retract the pressure roller 39.
[0059]
Next, the cylinder 53 is driven, the second press die 54 is moved to the first press die 52 side, the steel strip 1a disposed between the two press dies is press-molded and plastically deformed, and along the longitudinal direction. A steel strip 1a '(FIG. 5) having a creased shape is obtained.
[0060]
The steel strip 1a separated from the wound core 1 is in a curled state, but if the steel strip is press-molded as described above to have a creased shape along its longitudinal direction, the steel strip can be waisted. Therefore, the steel strip can be held in a substantially straight shape. Therefore, it is possible to prevent the steel strips from becoming entangled in the subsequent processes or to make the posture of the steel strip indefinite, and to handle the steel strips easily.
[0061]
After the press forming of the steel strip is completed, the piston rods of the cylinders 50 and 53 are retracted, the first press die 52 and the second press die 54 are opened, and the pressure roller 55 is separated from the feeding roller 56. Then, the tip end portion (the end portion on the second press die 54 side) of the steel strip holding table 51 is retracted to a position near the end portion on the cylinder 50 side of the conveying device 16. At this time, the steel strip 1 a ′ formed by the displacement of the pressure roller 55 toward the second press die 54 by the urging force of the spring 57 is pushed out and dropped onto the conveying device 16.
[0062]
The transport device 16 transports the steel strip 1a ′ formed by the steel strip forming device 15B to the cutting device 17 side. Since the steel strip 1 a ′ has a crease along the longitudinal direction thereof, the steel strip 1 a ′ is kept straight without being curved, so that the steel strip is transported smoothly by the transport device 16. The cutting device 17 receives the steel strip 1a ′ transported by the transport device 16 and chops the steel strip. The chopped steel strip is sent to a cleaning process to remove insulating oil, and then recycled as a valuable resource.
[0063]
In the dismantling apparatus described above, when the steel strip is separated from the wound core 1, there is a possibility that two or more steel strips that overlap with each other in a state in which they are difficult to be separated due to adhesion of insulating oil are separated in a state where they overlap. If two or more steel strips overlap, it is difficult to completely remove the insulating oil in a subsequent cleaning step.
[0064]
On the other hand, as described above, when the separated steel strip is cut finely with a cutter, the strips of the overlapped steel strip can be easily separated by means such as applying vibrations. Washing to remove the oil can be done completely.
[0065]
As in the above example, the steel strip 1a separated from the wound core by the steel strip separating device including the turntable 20 and the steel strip feeding roller 32 is moved by the steel strip take-up device 35 in the direction of separating from the wound core. By doing so, the wound core can be smoothly disassembled, but the steel strip take-up device 35 may be omitted.
[0066]
In the above example, the steel strip take-up device 35 is configured such that the steel strip separated from the wound core is sandwiched between the feeding roller 37 and the pressure roller 39 and moved in a direction away from the wound core. The belt take-up device 35 is not limited to the above example as long as it is configured to move the steel strip separated from the wound iron core in the direction away from the wound iron core. For example, the steel strip take-up device 35 may be configured so that the steel strip separated from the wound core is attracted by an attracting means such as a magnet and is moved away from the wound core.
[0067]
Moreover, since the steel strip can be held in a straight state by providing the steel strip forming device 15B as in the above example, the steel strip can be easily handled. The device may be omitted.
[0068]
In the above example, the steel strip is formed by the steel strip forming device so that the cross section has a U-shape, but in order to keep the steel strip straight, it is formed so as to form a fold along the longitudinal direction. For example, the steel strip may be formed so that the cross section exhibits a waveform.
[0069]
In the above example, after the steel strip is press-formed by the steel strip forming apparatus 15B, the press die is opened so that the steel strip is dropped onto the conveying means disposed below, but the steel strip forming apparatus 15B is used. The steel strip formed by the above method may be sent out along the longitudinal direction (to the side opposite to the steel strip take-up device 35) and supplied to the cutter.
[0070]
In the above example, the press-formed steel strip is supplied to the cutter and cut and then washed. However, the press-formed steel strip is first washed and then cut for recycling. You may do it.
[0071]
【The invention's effect】
As described above, according to the present invention, the steel strip separated from the wound iron core is press-formed to form a fold along the longitudinal direction of the steel strip, so that the bending of the steel strip is corrected. It can be almost straight. Therefore, when the steel strip separated from the wound core is transported to the next process or when it is cut, the steel strip can be easily handled and the steel strip can be easily processed by an automatic machine. Can do.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an example of a transformer having a wound iron core to be disassembled by the disassembly method of the present invention.
FIG. 2 is a perspective view showing a configuration of a main part of a recycling facility using a dismantling apparatus according to the present invention.
FIG. 3 is a top view showing a configuration of a main part of one embodiment of the disassembling apparatus according to the present invention.
4 is a cross-sectional view taken along line AA in FIG.
5 is a perspective view showing the shape of a steel strip obtained from the dismantling apparatus shown in FIG. 3. FIG.
FIGS. 6A to 6C are top views showing different examples of wound iron cores that can be disassembled by the method of the present invention, together with a steel strip feeding roller. FIGS.
[Explanation of symbols]
1 Roll iron core
20 Turntable
27 Iron core clamp
28 Fluid pressure cylinder
32 Steel strip feed roller
35 Steel strip take-up device
37 Feeding roller
38 Fluid pressure cylinder
39 Pressure roller

Claims (5)

In a method of dismantling a wound iron core formed by winding and laminating steel strips,
A steel strip separating step for separating the steel strip constituting the wound iron core, and a steel strip forming step for forming a fold along the longitudinal direction of the steel strip by press forming the separated steel strip. Wrapping iron core disassembly method characterized by this. In a method of dismantling a wound iron core formed by winding and laminating steel strips,
Steel constituting the wound iron core by rotating the wound iron core and the steel strip feeding roller in the same direction in a state where the wound iron core is fixed to a turntable and the steel strip feeding roller is pressed against the outer periphery of the wound iron core. A method for disassembling a wound steel core, comprising: a steel strip separating step for separating the strip; and a steel strip forming step for forming a fold along the longitudinal direction of the steel strip by press forming the separated steel strip. In a wound core dismantling device for disassembling a wound core formed by winding and laminating steel strips,
A turntable having a holding surface for holding a wound iron core to be disassembled, an iron core fixing mechanism for fixing the wound iron core to the holding surface of the turntable, a turntable driving mechanism for rotationally driving the turntable, and the turntable A steel strip feed roller provided to rotate around an axis parallel to the rotation axis of the steel strip and brought into contact with the outer peripheral surface of the wound core held by the turntable, and the steel strip feed roller connected to the outer periphery of the wound core. Roller urging means for urging to the side, feeding roller driving means for rotating the steel strip feeding roller in the same direction as the turntable, and being separated from the wound iron core as the turntable and the feeding roller rotate. A steel strip forming apparatus for press forming the steel strip and forming a crease along the longitudinal direction of the steel strip. Heart dismantling equipment. In a wound core dismantling device for disassembling a wound core formed by winding and laminating steel strips,
A turntable having a holding surface for holding a wound iron core to be disassembled, an iron core fixing mechanism for fixing the wound iron core to the holding surface of the turntable, a turntable driving mechanism for rotationally driving the turntable, and the turntable A steel strip feed roller provided to rotate around an axis parallel to the rotation axis of the steel strip and brought into contact with the outer peripheral surface of the wound core held by the turntable, and the steel strip feed roller connected to the outer periphery of the wound core. Roller urging means for urging the steel strip, roller driving means for rotating the steel strip feeding roller in the same direction as the turntable, and the winding core and the steel strip feeding roller are separated from the wound core with rotation. Separating steel strip guide means for guiding the steel strip in a predetermined direction; and taking the steel strip guided by the separating steel strip guide means, A steel strip take-out device that feeds away from a wound iron core fixed on the bull, and a steel strip sent out by the steel strip take-up device are press-formed to form a fold along the longitudinal direction of the steel strip. A wound iron core dismantling device comprising a steel strip forming device. The steel strip forming apparatus includes first and second press dies arranged opposite to each other, and a pair of rollers facing each other through windows provided in the first and second press dies, respectively. A steel strip drawing device that pulls between the first and second press dies by sandwiching the steel strip fed by the take-off device between the pair of rollers, and a press die drive that drives the first and second press dies The wound core dismantling apparatus according to claim 4, further comprising: an apparatus.

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