JP7284563B2 - Transformer Dismantling Method, Transformer Dismantling Jig, and Transformer Dismantling Cutting Device - Google Patents

Description

The present invention relates to the dismantling of a large transformer, and more particularly to a method of dismantling a transformer, a jig for dismantling a transformer, and a cutting device for dismantling a transformer, which are capable of reducing the labor required for the dismantling work.

Techniques for dismantling a large transformer are known as those disclosed in Patent Document 1 and Patent Document 2. The technique disclosed in Patent Document 1 relates to a technique of separating a coil and a core by cutting the coil in the vertical direction (direction along the core) using a band saw or the like. In Patent Document 1, the iron core is fixed by a push plate, and a guide is used to determine the cutting position of the saw blade so that the saw blade does not touch the iron core. I try to prevent that.

The technique disclosed in Patent Document 2 is a technique of using PCB (polychlorinated biphenyl) enclosed in a casing as cooling oil when cutting a transformer using a band saw or the like. Further, in Patent Document 2, it is shown that after separating the casing, iron core, etc. that constitute the transformer, they are individually cut.

JP 2003-217956 A JP-A-2005-95710

As disclosed in Patent Documents 1 and 2, in the dismantling of a large transformer, it is common practice to separate each component, then shred the separated components, and carry them out. there is However, the work of separating the components of a heavy object requires a great deal of labor, and the work of loading and hanging in high places is frequently performed, which is dangerous.

The present invention provides a transformer dismantling method that can reduce the labor of workers, reduce the frequency of high-place work compared to conventional methods, and improve safety. and to provide a cutting device.

A transformer dismantling method according to the present invention for achieving the above object is a method for dismantling a transformer main body after PCBs are discharged and treated and external parts are removed, the method comprising: a casing and internal elements constituting the transformer main body; and are bundled via a jig, and the casing and the internal element are cut and transported as an integral body.

Further, in the transformer dismantling method having the characteristics described above, the internal elements can be the upper yoke and the iron core, or the iron core alone. With such characteristics, the transformer main body can be cut without dividing the silicon steel plate forming the iron core.

Further, a transformer dismantling method according to the present invention for achieving the above object is a method for dismantling a transformer main body after PCBs are discharged and processed and exterior parts are removed, and the casing constituting the transformer main body is dismantled. A casing upper cutting step of cutting and removing the upper portion to open the internal elements, and after the casing upper cutting step, the upper yoke and the iron core, which are internal elements constituting the casing and the transformer main body, are bound together via jigs. a coil top cutting step of cutting and removing as an integral body; after the coil top cutting step, the casing and the iron core are bound via the jig, and a coil middle cutting step of cutting and removing as an integral body; It may be characterized by having

Further, in the transformer dismantling method having the above characteristics, it is preferable to include a coil extracting step of extracting the coil from the iron core between the coil upper portion cutting step and the coil middle portion cutting step. With such a feature, the transformer main body can be cut while avoiding the coil which is likely to be caught by the saw blade.

Further, in the transformer dismantling method having the characteristics described above, it is preferable that the step of cutting the middle part of the coil is repeated a plurality of times by shifting the cutting position downward. With such characteristics, the cutting can be performed after the weight of the cut portion is within a weight range that can be suspended by a crane or the like.

Further, in the method for dismantling the transformer having the characteristics described above, it is preferable to include a step of arranging the sheet piles between the adjacent iron cores after the step of extracting the coil. Due to such characteristics, even when there are a plurality of iron cores, each of the plurality of iron cores can be restrained from four directions.

Further, a jig for dismantling a transformer applicable to the implementation of the above method includes: a jig for binding a casing and internal elements constituting a main body of the transformer after discharging and processing the PCB and removing exterior parts; and the internal element as a single body, the jig used in a transformer dismantling method for cutting and transporting the transformer main body. as a clamping means for clamping the upper yoke and the iron core, or a single core.

Further, in the transformer dismantling jig having the characteristics described above, the gripping means includes at least a longitudinal side plate gripping portion for gripping a portion of the side plate of the casing in a longitudinal direction, and a portion of the side plate of the casing in a lateral direction. It is preferable to have a configuration in which the short side plate gripping portion that grips the portion is separated. With such a feature, it is possible to share the holding means even when the sizes of the casings constituting the transformer main body are different.

Further, in the jig for dismantling the transformer having the characteristics as described above, it is preferable that the inner wall of the holding means is provided with a support plate for supporting the holding means. By having such characteristics, it becomes easy to install and hold the clamping means.

Further, a transformer dismantling cutting device applicable to the implementation of the above method binds the casing and the internal elements constituting the main body of the transformer after discharging and processing the PCB and removing the exterior parts via a jig, A cutting device for cutting and transporting the casing and the internal element as an integral body, comprising: a pair of pedestals arranged along the cutting direction of the transformer body on both sides of the transformer body; A drive unit that can move along one of the frames, a driven unit that can move along the other frame, and a drive unit that spans between the drive unit and the driven unit and is rotated by the drive unit. and a movable endless saw blade.

Furthermore, in the transformer dismantling cutting device having the characteristics described above, it is desirable that the mount has a height adjusting mechanism. With such characteristics, it is possible to cut the transformer body step by step in the horizontal direction.

Furthermore, the transformer dismantling cutting device having the characteristics described above may be configured to have a horizontal feed mechanism for moving the driving unit and the driven unit along the pedestal. According to such a configuration, regardless of the amount of cutting resistance, the movement speed when moving the driving unit and the driven unit can be made constant.

According to the transformer dismantling method having the characteristics described above, the external elements and internal elements that constitute the transformer can be cut at the same time. In addition, since the height of the transformer main body is lowered for each cutting operation, the frequency of high-place work can be reduced, and safety can be improved.

FIG. 4 is a plan view showing a state in which a jig is attached to a transformer body to be dismantled; FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG. 1; FIG. 5 is a plan view showing a state in which jigs are attached to the transformer main body after cutting the upper yoke and removing the coil; It is a figure which shows the front structure of the cutting device seen from the transversal direction of a transformer main body. It is a figure which shows the side structure of the cutting device seen from the longitudinal direction of a transformer main body. It is a flow diagram for explaining the flow of the transformer dismantling method according to the embodiment. FIG. 4 is a diagram showing a state in which an upper portion of a casing in a transformer body is cut; FIG. 4 is a diagram showing a state in which a jig is attached to a transformer main body in which an upper portion of a casing has been cut;

Embodiments of a method for dismantling a transformer, a jig for dismantling a transformer, and a cutting device for dismantling a transformer according to the present invention will now be described in detail with reference to the drawings. It should be noted that the embodiment shown below is a part of the preferred form for carrying out the present invention, and as long as the effect of the invention is exhibited, even if the part is changed, it is one part of the present invention. can be regarded as a department.

[Outline of transformer to be dismantled]
As shown in FIGS. 1 to 5, the transformer to be dismantled in this embodiment has the PCB inside the casing 12 discharged and processed, and the external parts such as the radiator plate, conservator, and soundproof plate (not shown) are removed. A transformer main body 10 is assumed. The transformer main body 10 is mainly composed of a casing 12, an iron core 14, a yoke (in the embodiment, an upper yoke 14a), and a coil 16, and has an internal frame and the like.

[Jig configuration]
First, a transformer dismantling jig (hereinafter simply referred to as a jig 20) for carrying out the transformer dismantling method of the present invention will be described with reference to FIGS. 1 to 3. FIG. In the drawings, FIG. 1 is a plan view showing a state in which a jig is attached to a transformer body to be dismantled, and FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG. FIG. 3 is a plan view showing a state in which jigs are attached to the transformer main body after cutting the upper yoke and removing the coil.

A jig 20 according to this embodiment is mainly composed of a gripping means 22 and a holding means 28 . The gripping means 22 is an element for gripping the side plate of the casing 12 forming the transformer main body 10 . In this embodiment, it is composed of a pair of long side plate gripping portions 24 and a pair of short side plate gripping portions 26 . The long side plate gripping portion 24 and the short side plate gripping portion 26 each have an inverted U shape (inverted U shape) in which inner walls 24a, 26a and outer walls 24b, 26b are connected by bridges 24c, 26c, respectively, as shown in the cross-sectional configuration in FIG. U-shaped). Support plates 24d and 26d are provided at the lower ends of the inner walls 24a and 26a, and fixing means 24e and 26e (for example, tightening bolts) are provided on the outer walls 24b and 26b to perform a gripping function. ing. Further, in this embodiment, the bridge portions 24c and 26c are provided with lifting hooks 24f and 26f corresponding to lifting by a crane or the like at a plurality of positions.

The gripping means 22 having such a structure is used by interposing the side plates of the casing 12 between the inner walls 24a, 26a and the outer walls 24b, 26b. Specifically, after interposing the side plates between the inner walls 24a, 26a and the outer walls 24b, 26b, the side plates are held by pressing the side plates against the inner walls 24a, 26a by the fixing means 24e, 26e. This completes the gripping of the side plate by the gripping means 22 .

Support plates 24d and 26d provided at the lower ends of the inner walls 24a and 26a are elements for arranging holding means 28, the details of which will be described later. Therefore, when the clamping means 28 is fixed to the gripping means 22, it may not be provided. In addition, of course, the arrangement position is not limited to the lower end of the inner wall, and may be arbitrarily changed according to the arrangement position and form of the clamping means 28 .

It should be noted that it is possible to make the gripping means 22 have a frame shape in plan view, but by dividing it into the long side plate gripping portion 24 and the short side plate gripping portion 26, it is possible to apply it to casings 12 of various sizes. becomes. It goes without saying that the long side plate gripping portion 24 and the short side plate gripping portion 26 may be further subdivided. For example, the long side plate gripping portion 24 can be configured by arranging a plurality of the short side plate gripping portions 26 in the embodiment in series.

The clamping means 28 can firmly clamp the structure, such as the upper yoke 14a and the iron core 14, positioned between the opposing gripping means 22 (longitudinal side plate gripping portion 24 and short side plate gripping portion 26) as a starting point. If possible, the specific configuration is not questioned. An example of the clamping means 28 is a jack as shown in FIGS. 1 to 3. FIG. The jack may be manually operated, or may be operated by electric power, hydraulic pressure, or the like.

The clamping means 28 is supported by support plates 24d and 26d provided on the inner walls 24a and 26a of the gripping means 22, and is placed between the inner walls 24a and 26a and the internal structure (the upper yoke 14a and the iron core 14). By applying a force in the tensioning direction, it is possible to facilitate installation and stabilize the clamping state.

[Configuration of cutting device]
Next, the configuration of the transformer dismantling cutting device (hereinafter simply referred to as the cutting device 30) used in the embodiment will be described with reference to FIGS. 4 and 5. FIG. In the drawings, FIG. 4 is a diagram showing the front configuration of the cutting device viewed from the transverse direction of the transformer body, and FIG. 5 is a view showing the side configuration of the cutting device viewed from the longitudinal direction of the transformer body. . Also, the cutting device 30 described below is merely an example of a cutting device that can be applied to implement the transformer dismantling method according to the present invention. That is, the means for cutting the transformer main body 10 is not limited in carrying out the transformer dismantling method to be described later.

A cutting device 30 according to this embodiment is a band saw based on a base 32 , a drive unit 34 , a driven unit 36 and an endless saw blade 38 . The mounts 32 are arranged in pairs along the side plates of the transformer body 10 to be dismantled. In the examples shown in FIGS. 4 and 5, they are arranged along the longitudinal side plates of the transformer body 10 .

A track 32a such as a rail is provided at the upper end of the pedestal 32 so that a driving unit 34 and a driven unit 36, which will be detailed later, can move stably. The mount 32 according to the embodiment includes a height adjustment mechanism 32b. With such a configuration, the height of the endless saw blade 38 can be changed according to the cutting position of the transformer body 10 . The specific configuration of the height adjustment mechanism 32b is not particularly limited as long as it can change the height of the track 32a. That is, not only the jacks shown in FIG. 4 whose height can be adjusted steplessly, but also simple structural recombination such as recombination of support frames with different lengths depending on the application may be used.

Also, in the cutting device 30, a foothold (not shown) along the track 32a may be arranged on the side of the frame 32. As shown in FIG. This configuration allows the operator to visually check the state of the endless saw blade 38 during cutting.

The drive unit 34 is a unit for rotating the endless saw blade 38 wound between it and the driven unit 36 along its track. The drive unit 34 is basically composed of a frame 34a, a drive pulley 34b, a driven pulley 34c, and a tension adjustment pulley 34d. The frame 34a is an element for arranging the drive pulley 34b, the driven pulley 34c, and the tension adjustment pulley 34d at predetermined positions. Means 34e are provided. As the moving means 34e, for example, a roller or the like may be used.

The drive pulley 34b is an element for rotating the endless saw blade 38, and is provided with a motor 34b1 directly or via a transmission gear. The driven pulley 34c serves as a guide for guiding the endless saw blade 38 rotating via the drive pulley 34b on the orbit. The tension adjusting pulley 34d plays the role of adjusting the tension of the endless saw blade 38 wound along the circular track. In the case of this embodiment, the tension adjustment pulley 34d is placed between the drive pulley 34b and the driven pulley 34c, and the tension adjustment pulley 34d is pressed against the endless saw blade 38 so as to bend the endless saw blade 38 passing between the two. Excessive bending of the saw blade 38 can be suppressed, and the cutting action can be stabilized.

The driven unit 36 is a unit that spans between the drive unit 34 and plays a role of forming a circular track of the endless saw blade 38 that is rotated by the drive unit 34 . The driven unit 36 basically comprises a frame 36a, a pair of driven pulleys 36b and 36c, and a tension adjusting pulley 36d. The frame 36a is an element for arranging a pair of driven pulleys 36b and 36c and a tension adjusting pulley 36d at predetermined positions, similar to the drive unit 34 described above. Further, a moving means 36e for moving on the track 32a provided on the pedestal 32 is provided at the lower end.

Driven pulleys 36b and 36c, like driven pulley 34c provided in drive unit 34, guide endless saw blade 38 rotating through drive pulley 34b provided in drive unit 34 on the orbit. Act as a guide. The tension adjusting pulley 36d plays a role of adjusting the tension of the endless saw blade 38 wound along the circular track. In the case of this embodiment, the tension adjustment pulley 36d is arranged between a pair of driven pulleys 36b and 36c, and the tension adjusting pulley 36d is pressed against the endless saw blade 38 so as to bend the endless saw blade 38 passing between them. It is possible to suppress the excess bending that has occurred in the blade 38, and to stabilize the cutting action.

Further, in the cutting device 30 according to the embodiment, the drive unit 34 is arranged on one of the pedestals 32 which are arranged at opposing positions via the transformer main body 10, and the driven unit 36 is arranged on the other. , and is configured to be able to cut the element positioned between the driving unit 34 and the driven unit 36 .

Between the driving unit 34 and the driven unit 36 that constitute the cutting device 30, a beam portion 42 is provided that connects the respective frames 34a and 36a. The beam portion 42 is arranged at least above the circular orbit defined by the endless saw blade 38 . By providing the beam portion 42, the drive unit 34 and the driven unit 36 fall in a direction approaching each other due to the resistance applied when the transformer main body 10 is cut by the endless saw blade 38 and the tensile force accompanying the rotation of the endless saw blade 38. can be prevented. Moreover, since the positional relationship between the driving unit 34 and the driven unit 36 can be stabilized, twisting or the like of the endless saw blade 38 can be prevented.

The endless saw blade 38 is an element for cutting the transformer body 10 . The endless saw blade 38 is composed of a belt-shaped thin blade having flexibility capable of rotating on a circular track defined by the driving unit 34 and the driven unit 36 . By connecting both ends of the band-shaped saw blade in a ring shape, the endless saw blade 38 can cut by turning.

Further, the cutting device 30 according to the embodiment has a horizontal feed mechanism 40 between the base 32 and the drive unit 34 and driven unit 36 . The horizontal feed mechanism 40 is an element for moving the drive unit 34 and the follower unit 36 along the track 32 a provided on the base 32 . For example, a ball screw arranged along the track 32a, a slider movable along the ball screw, and a motor for rotating the ball screw may be provided. When the horizontal feed mechanism 40 is configured as described above, the ball screw and the motor may be arranged on the base 32 and the slider may be arranged on the driving unit 34 and the driven unit 36 . With such an arrangement configuration, the drive unit 34 and the driven unit 36 can be moved along the track 32a by rotating the ball screw with the motor.

It should be noted that the movement of the drive unit 34 and the driven unit 36 does not need to be powered and automated, and may be configured to be manually moved. However, by automating by providing the horizontal feed mechanism 40 as in the present embodiment, it becomes possible to move the driving unit 34 and the driven unit 36 at a constant speed. As a result, the feed speed does not fluctuate due to the amount of cutting resistance, and the movement during cutting can be stabilized.

According to the cutting device 30 having such a configuration, the driving unit 34 and the driven unit 36 are moved along the track 32a provided on the frame 32 while rotating the endless saw blade 38, thereby cutting the transformer main body 10. Horizontal cutting is possible. Further, in the cutting device 30 according to this embodiment, the mount 32, the driving unit 34 and the driven unit 36 are configured as separate bodies. As a result, when the device requires curing, the drive unit 34 and the driven unit 36 can be operated after at least the base 32 is completely cured. Therefore, the contamination area of the device can be reduced. In addition, of course, subdividing the components facilitates carrying in and out of the device, as well as assembly and disassembly.

[Dismantling method]
The transformer dismantling method according to the present embodiment will be described below with reference to the flowchart shown in FIG. The method for disassembling the transformer according to the present embodiment will be described with reference to the transformer main body 10 in which the PCB inside the casing 12 has been removed and the exterior parts such as the radiator plate, conservator, and soundproof plate have been removed, as described above. do.

First, the cutting device 30 is carried in and assembled. To assemble the cutting device 30, first, the pedestal 32 is arranged along the longitudinal direction of the transformer body 10 to be dismantled. Next, the drive unit 34 and the driven unit 36 are installed on the track 32a provided on the top of the mount 32, and the beam portion 42 is arranged between the two units. After that, the endless saw blade 38 is wound around the drive pulley 34b and the driven pulley 34c provided in the drive unit 34, and the driven pulleys 36b and 36c provided in the driven unit 36, and tension adjustment pulleys 34d and 36d adjust the endless saw blade. 38 is adjusted (S010).

[Casing Upper Cutting Process]
Next, the height of the pedestal 32 is adjusted so that the cutting position by the endless saw blade 38 is the upper portion 12a of the casing 12 (see FIG. 7). Then, the drive unit 34 is driven to rotate the endless saw blade 38, and the drive unit 34 and the driven unit 36 are moved along the track 32a of the base 32 to cut the upper portion 12a of the casing 12. . Here, the upper portion 12a of the casing 12, which is to be the cut portion, is preferably suspended in advance by a lifting tool such as a crane (S020).

The cut upper part 12a of the casing 12 is moved by a crane or the like as shown in FIG. 7 (S030), cut into pieces separately and packed in a storage box or the like (S031). The upper portion 12a of the casing 12 after being boxed is moved to a predetermined storage location (S032).

[Coil top cutting process]
After opening the upper portion of the casing 12 that constitutes the transformer main body 10, the jig 20 is lifted by a crane or the like and placed on the upper portion of the transformer main body 10 as shown in FIG. The jig 20 arranges and fixes a long side plate gripping portion 24 and a short side plate gripping portion 26 constituting the gripping means 22 on the longitudinal portion and the width direction portion of the side plates constituting the casing 12, respectively. do. A pinching means 28 is arranged on the side of the inner walls 24a, 26a of the gripping means 22 to generate a force between the upper yoke 14a and the inner walls 24a, 26a in the direction of separating them. At this time, opening stoppers 44 for preventing the expansion of the casing 12 due to the use of the clamping means 28 are arranged between the long side plate gripping portions 24 and between the short side plate gripping portions 26, respectively. . Starting from the long side plate gripping portions 24 arranged to form a pair and the short side plate holding portions 26 arranged to form a pair as well, the force of the clamping means 28 is applied to the upper yoke 14a existing between them. , the upper yoke 14a and the iron core 14 arranged inside the upper yoke 14a are sandwiched. As a result, the casing 12, the upper yoke 14a, and the iron core 14 are bound together, and can be handled as an integral unit (S040).

After the jig 20 is attached to the transformer main body 10, the hoisting device (e.g., the balance 50 shown in FIG. 8 and the wires attached thereto, etc.) from which the jig 20 is hung is released, and the endless saw blade of the cutting device 30 is removed. 38 is positioned. The endless saw blade 38 is positioned by lowering the driving unit 34 and the driven unit 36 by the height adjusting mechanism 32b of the base 32 (S050).

After the endless saw blade 38 is positioned, the driving unit 34 and the driven unit 36 are moved along the track of the base 32 while the endless saw blade 38 is rotated. As a result, the casing 12, the upper yoke 14a, and the iron core 14 can be horizontally cut all at once or stepwise (including repeating cutting and stopping, preparation for cutting, etc.). Here, when the load applied to drive the endless saw blade 38 becomes large due to the weight applied to the cut portion, the endless saw blade 38 is rotated by driving a wedge or the like (not shown) into the cut portion to widen the cut portion. It is desirable to reduce the load at the time (S060).

Next, the jig 20 holding the cut portion is lifted by a crane or the like, and the casing 12, the upper yoke 14a, and the iron core 14 corresponding to the cut portion are moved. Since the casing 12, the upper yoke 14a, and the iron core 14 can be handled as a unit by the grasping means 22 and the clamping means 28, the cutting portion can be easily moved (S070). The casing 12, the upper yoke 14a, and the iron core 14 that have been moved as a unit are unbound by the jig 20, so that the silicon steel plates forming the upper yoke 14a and the iron core 14 are dismantled. Also, the casing 12 is shredded and packed in a storage box or the like (S071). The boxed upper yoke 14a, core 14, and casing 12 are moved to a predetermined storage location (S072).

[Coil extraction process]
After the upper yoke 14a is removed, the coil 16 is removed from the iron core 14. - 特許庁If there are a plurality of coils 16, the coils 16 should be removed individually (S080). The coil 16 extracted from the iron core 14 is moved (S090), shredded and packed in a storage box or the like (S091). The boxed coil 16 is moved to a predetermined storage location (S092).

[Coil middle part cutting process]
After removing the coil 16 from the iron core 14, the jig 20 is lifted by a crane or the like, placed on the upper part of the transformer main body 12, and fixed. Fixing of the jig 20 is the same as in S040 described above, but the iron core 14 is clamped by the clamping means 28 . Here, when there are a plurality of iron cores 14, it is preferable to drive sheet piles 52 between adjacent iron cores 14 as shown in FIG. The iron core 14 is configured by laminating a plurality of thin silicon steel plates. By restraining the iron cores 14 from all sides by the sheet piles 52 and the clamping means 28, it is possible to prevent the silicon steel plate from being split during cutting, thereby increasing the cutting resistance of the endless saw blade 38. It is also possible to prevent the iron core 14 from collapsing (S100).

Next, the slinger that slings the jig 20 is released, and the endless saw blade 38 in the cutting device 30 is positioned. Positioning of the endless saw blade 38 is achieved by lowering the driving unit 34 and the driven unit 36 by means of the height adjusting mechanism 32b of the base 32. As shown in FIG. The position of the endless saw blade 38 is determined so that the casing 12 and the iron core 14, which can be handled as one body through the jig 20, have a thickness that can be lifted by a crane or the like after cutting. For example, it is preferable to cut along the broken line portion shown in FIG. 8 (S110).

After positioning the endless saw blade 38, the drive unit 34 and the driven unit 36 are moved along the track 32a of the base 32 while the endless saw blade 38 is rotated. Thereby, the casing 12 and the iron core 14 can be horizontally cut at once or stepwise. Here, if the load applied to drive the endless saw blade 38 is increased due to the weight applied to the cut portion, as described above, it is preferable to widen the cut portion by driving a wedge or the like into the cut portion (S120).

After the cutting is finished, the cut casing 12 and core 14 are partially lifted up and moved together with the jig 20 (S130). Of the casing 12 and the iron core 14 that have been moved together with the jig 20, the iron core is unbound by the jig 20, so that the silicon steel plates forming the iron core 14 are dismantled. Also, the casing 12 is shredded and packed in a storage box or the like (S131). The boxed iron core 14 and casing 12 are moved to a predetermined storage location (S132).

Here, the cutting of the casing 12 and the iron core 14 from S100 to S132 is repeated until the lower elements (the lower portion of the iron core 14 and the lower portion of the casing 12) reach a weight that can be lifted by a crane or the like. In the example of FIG. 8, repetition is performed for the number of cut points indicated by broken lines (S140).

After the weight of the lower element reaches a weight that can be lifted by a crane or the like, anchor bolts (not shown) fixing the lower element to the base 18 are removed (S150). After removing the anchor bolts, the lower element consisting of the lower portion of the iron core 14 and the lower portion of the casing 12 is lifted and moved (S160). Of the moved lower elements, the iron core 14 is dismantled into silicon steel plates, and the casing 12 is shredded and packed in a storage box or the like (S161). The boxed iron core 14 and casing 12 are moved to a predetermined storage location (S162).

After disassembling the transformer body 10, the cutting device 30 is disassembled and moved (S170). When the transformer main body 10 is dismantled, if contaminants such as PCBs are present, the unloading process differs depending on the presence or absence of contamination. For example, in the case of an element such as the pedestal 32 that is clearly free from adhesion of contaminants due to curing, the curing is removed, and the element is carried out after decontamination (S171). On the other hand, the endless saw blade 38 and the drive unit 34 and driven unit 36 with which the endless saw blade 38 is in contact are disassembled and shredded, and then packed in a storage box or the like (S172). The contaminated elements of the cutting device 30 after being boxed are moved to a predetermined storage location (S173).

According to the transformer dismantling method as described above, the elements constituting the transformer main body 10 are cut by a power machine in the horizontal direction at once or in stages, and this process is repeated multiple times in the height direction to cut the entire transformer. It becomes possible to Therefore, the labor of the operator can be greatly reduced compared to the conventional transformer dismantling method in which the disassembling and cutting are performed for each component.

Further, in the conventional dismantling method in which the transformer body 10 is vertically cut to disassemble each component, an operator has to climb to the top of the transformer body 10 each time the transformer body 10 is cut or lifted. On the other hand, in the transformer dismantling method according to the present invention, the transformer main body 10 is horizontally cut. Therefore, as the work progresses, the frequency of work at height by the worker is reduced, and safety can be improved.

In the above embodiment, the band saw having the endless saw blade 38 is used as the cutting device 30 to cut the transformer body 10 . However, the transformer dismantling method according to the present invention does not limit the configuration of the cutting device 30 . That is, if it is possible to cut the casing 12 constituting the transformer main body 10 and the upper yoke 14a and the iron core 14 arranged inside the casing 12, a cutting device equipped with a reciprocating saw blade or a chip saw is used. A cutting device or the like having a circular saw blade may be used. This is because the effect of the transformer dismantling method according to the present invention can be obtained regardless of which cutting device is used. Of course, if the labor required for cutting is not a concern, the cutting may be performed by human power or the like, not limited to a device having power, and may be regarded as a part of the present invention.

10 . , 22 ...... Grasping means, 24 ...... Longitudinal side plate gripping portion, 24a ...... Inner wall, 24b ...... Outer wall, 24c ...... Bridge portion, 24d ...... Support plate, 24e ...... Fixing Means 24f Suspension hook 26 Short side plate gripping portion 26a Inner wall 26b Outer wall 26c Bridge portion 26d Support plate 26e . Drive unit 34a Frame 34b Drive pulley 34b1 Motor 34c Driven pulley 34d Tension adjustment pulley 34e Moving means 36 Driven unit , 36a Frame 36b Driven pulley 36c Driven pulley 36d Tension adjusting pulley 36e Moving means 38 Endless saw blade 40 Horizontal feed Mechanism, 42... Beam, 44... Opening stopper, 50... Balance, 52... Sheet pile.

Claims (8)

A method for dismantling a transformer body after discharging and processing PCBs and removing external parts, comprising:
binding a casing and an internal element constituting the transformer main body via a jig;
A method for dismantling a transformer, wherein the casing and the internal element are cut and transported as a unit. 2. The transformer dismantling method according to claim 1, wherein said internal elements are an upper yoke and an iron core, or said iron core alone. A method for dismantling a transformer body after discharging and processing PCBs and removing external parts, comprising:
a casing upper cutting step of cutting and removing the upper part of the casing constituting the transformer main body to open the internal elements;
After the casing top cutting step, a coil top cutting step of binding the upper yoke and core, which are internal elements constituting the casing and the transformer body, with a jig, and cutting and removing them as an integral body;
After the coil top cutting step, the coil middle cutting step of binding the casing and the iron core via the jig and cutting and removing them as an integrated body;
A method for dismantling a transformer, comprising: 4. The transformer dismantling method according to claim 3, further comprising a coil extracting step of extracting the coil from the iron core between the step of cutting the upper part of the coil and the step of cutting the middle part of the coil. 5. The transformer dismantling method according to claim 3, wherein the step of cutting the middle part of the coil is repeated a plurality of times by shifting the cutting position downward. 6. A method for dismantling a transformer according to claim 4 or claim 5 depending on claim 4, further comprising a step of placing a sheet pile between adjacent cores after the step of extracting the coil. After discharging and processing the PCB, removing exterior parts, cutting and removing the upper part of the casing that constitutes the main body of the transformer and removing it to open the internal elements, the casing and the internal elements are bound together , and the casing and the internal parts are A jig used in a transformer dismantling method for cutting and transporting elements as an integrated body,
grasping means having an inner wall, an outer wall, and a bridge portion connecting the inner wall and the outer wall, forming an inverted U shape, and grasping the casing while straddling the side plate of the casing ;
clamping means for clamping the upper yoke and the iron core as the internal element , or a single iron core, with the inner walls of the pair of gripping means gripping the side plates arranged oppositely as base points ;
A jig for dismantling a transformer , wherein a support plate for supporting the clamping means is provided at a lower end of the inner wall . The gripping means may at least:
a longitudinal side plate gripping portion for gripping a longitudinal portion of the side plate of the casing;
a lateral side plate gripping portion for gripping a lateral portion of the side plate of the casing;
8. The jig for dismantling the transformer according to claim 7, wherein the jig is divided into two parts.

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