JP4584081B2 - Recycling method and dismantling device for power distribution arrester - Google Patents

Description

  The present invention relates to a recycling method for reusing a distribution lightning arrester installed in a distribution facility of a 6600 V transmission line after the service life has elapsed, and a dismantling device for dismantling the power distribution lightning arrester after the service life has elapsed.

  For example, lightning arresters for power distribution installed in the distribution facility of 6600V transmission line were discarded when the useful life passed, and most of them were disposed of in landfills. At present, some of the lightning arresters for power distribution have been used for material recycling by smashing firewood pipes and taking out metal internal parts.

  The dismantling of the power distribution arrester by crushing the soot tube is one of the causes of the structural characteristics of the arrester. That is, in the case of a lightning arrester for power distribution, the terminal metal fitting is firmly tightened to the porcelain porcelain tube in order to maintain long-term hermetic performance, and therefore it cannot be easily disassembled except by breaking the porcelain tube.

  By the way, while the amount of industrial waste generated has remained at a high level, it is difficult to locate industrial waste treatment facilities, and a recycling-oriented society is promoted through recycling that promotes effective use of resources and reduction of industrial waste. The formation of is urgent. It is indispensable to develop recycling that can significantly reduce industrial waste even in power distribution arresters that have passed the service life.

  In order to promote the recycling of this power distribution arrester, it is important that the power distribution arrester can be easily disassembled other than by smashing the steel pipe. For example, if you try to dismantle the power surge arrester by cutting off the terminal fittings attached to seal one end of the dredge using a lathe, etc., only the terminal fittings will be damaged without damaging the dredge. It is possible to cut.

  However, since the O-ring as a gasket interposed between the soot tube and the terminal metal fitting is close at the cutting point of the terminal metal fitting, the insulation of the lightning arrester is maintained by the frictional heat at the time of cutting. There is a problem that harmful gas is generated. That is, there is a problem that the rubber O-ring emits smoke and carbon is deposited around the O-ring to lower the insulation. On the other hand, when trying to cut a portion where the O-ring is not close by changing the cutting position of the terminal metal fitting, the metal pipe is joined to the terminal metal fitting at the cut location, which may damage the pipe. Therefore, it is not a preferable means.

  Therefore, the present invention has been proposed in view of the above-described problems, and the object of the present invention is to easily realize the recycling of the distribution lightning arrester, and to dismantle the distribution lightning arrester in the recycling. It is to realize easily without breakage of the soot tube.

  Generally, the nominal discharge current of a lightning arrester for power distribution (hereinafter simply referred to as a lightning arrester) is 2500A, but the approximate frequency of operation of the lightning arrester is 1000A or more per unit about once every 20 years, 2000A or more. Once every about 50 years, 3000A or more is once every 100 years, and it is estimated that most arresters are not damaged by lightning surges. Therefore, if the lightning arrester operates below the specified value, it will not deteriorate even if it operates several tens of times, and the lightning arrester rarely operates several tens of times due to the actual lightning phenomenon. Most parts are reproducible except. With regard to the airtightness performance of the lightning arrester, the compression set becomes large as it is used for a long time, and the airtightness becomes unreliable. Therefore, since the portion where deterioration is observed can be almost limited to the hermetic portion, most of the lightning arresters can be regenerated as recycled products by replacing the hermetic portion.

Therefore, the lightning arrester recycling method according to the present invention accommodates at least a ZnO element in a porcelain insulator tube, and a line side terminal and a ground side terminal electrically connected to the ZnO element as end portions of the porcelain insulator tube. And a lightning arrester installed in a power distribution system in which a terminal metal fitting for the grounding side terminal is sealed to one end of the porcelain porcelain tube via an O-ring, and an exterior part is mounted on the porcelain porcelain tube. In this case, a rotation-free disk-shaped cutting blade is brought into contact with a planned cutting position of the terminal metal fitting sealed to one end of the porcelain porcelain tube, and the porcelain porcelain tube is rotated to follow the rotation of the porcelain porcelain tube. the cutting blade on the said arrester dismantled by bisecting the terminal fittings while rotating in the direction opposite to the rotation of the porcelain porcelain bushing was fractionated and evaluate the components of the surge arrester Te, the Among the components, it is possible to reuse the recyclable components after cleaning the recyclable components, replace the non-renewable components with new ones, and assemble these new components as a lightning arrester. And

  Here, “at least the ZnO element is accommodated in the porcelain porcelain tube” means that the internal element accommodated in the porcelain porcelain tube is not only the ZnO element but also a sealing member such as a series gap, a spring or an O-ring as a connecting conductor It is meant to include. The lightning arrester that is the subject of the present invention is installed in a 6600V transmission line distribution facility unlike a general lightning arrester, and a grounding terminal terminal fitting is connected to one end of a porcelain porcelain tube via an O-ring. And has a sealed structure.

  In the lightning arrester recycling method based on the above configuration, in the lightning arrester disassembly process, the exterior parts are removed, the ground side terminal part is disassembled, the internal elements are taken out, and the line side terminal is disassembled. Next, in the separation process of the component parts obtained by the disassembly, the reproducible component parts and the non-recyclable component parts are classified and evaluated based on the electrical characteristic inspection and the appearance inspection. Non-recyclable components are treated as industrial waste or material recycling. Next, after cleaning the recyclable components, finally, in the reassembly process of the components, the recyclable components are reused and the non-renewable components are replaced with new ones. Assemble new components as lightning arresters. By going through the above steps, that is, the disassembly step, the separation step, the cleaning step, and the reassembly step, it is possible to easily realize the recycling of the lightning arrester.

  The dismantling device includes a rotating mechanism that rotates the porcelain porcelain tube in a fixed posture, a disc-shaped cutting blade that is juxtaposed to the porcelain porcelain tube and held in a rotation-free state, and the porcelain porcelain tube and cutting blade. And a transfer mechanism that allows the disk-shaped cutting blade to abut on the planned cutting position of the terminal metal fitting, and causes the disk-shaped cutting blade to abut on the planned cutting position of the terminal metal fitting, thereby It is characterized in that the disc-shaped cutting blade can be rotated in the opposite direction to the rotation of the porcelain porcelain tube following the rotation of the porcelain tube.

  In the present invention, by using the disk-shaped cutting blade described above, it is difficult for frictional heat to be generated at the time of cutting, so that the planned cutting portion of the terminal metal fitting is a gasket interposed between the porcelain insulator tube and the terminal metal fitting. Even if it is close to the O-ring, it is possible to suppress the generation of harmful gas in maintaining the insulation of the lightning arrester. Moreover, the porcelain porcelain tube is not damaged by cutting a portion close to the O-ring.

  In addition, as for the blade edge | tip angle of the disk shaped cutting blade in this dismantling apparatus, it is desirable to set it as 30-50 degrees. If the blade edge angle is smaller than 30 °, the durability is not sufficient for cutting. Conversely, if the blade edge angle is larger than 50 °, the cut surface of the terminal metal fitting is deformed and is difficult to cut.

  According to the present invention, the lightning arrester is disassembled, the components of the lightning arrester are separated and evaluated, and among the components, the recyclable component parts are reused and regenerated through cleaning of the recyclable component parts. By replacing the impossible components with new ones, reusing them, and assembling the new components as power distribution arresters, it is possible to easily realize recycling of the arresters. Here, it has been confirmed that 85% or more of the recyclable components can be taken out from the lightning arrester, which makes it possible to greatly reduce industrial waste.

  Also, by using a disc-shaped cutting blade at the time of disassembly, the frictional heat is less likely to be generated at the time of cutting, so that the planned cutting location of the terminal fitting is a gasket that is interposed between the porcelain insulator tube and the terminal fitting. Even if it is close to the O-ring, it is possible to suppress the generation of harmful gas in maintaining the insulation of the lightning arrester, and damage to the porcelain porcelain tube by cutting the location close to the O-ring Never give. As a result, the lightning arrester can be dismantled to such an extent that it can be recycled.

  Embodiments of the present invention are described in detail below. FIG. 1 is a diagram for explaining the handling of each component from the dismantling of the lightning arrester 1 to assembly in the lightning arrester 1 recycling method, and FIG. 2 explains the recycling method of the lightning arrester 1 for each step. It is a flowchart. FIG. 3 illustrates an exemplary structure of the lightning arrester 1.

  First, the lightning arrester 1 as a recycling target is installed in a distribution facility of a 6600 V transmission line, and has the following structure. As shown in FIG. 3, an internal element 3 including a rare earth-based or bismuth-based ZnO element 2 is accommodated in a porcelain porcelain tube 4, and a line-side terminal 5 and a ground-side terminal 6 electrically connected to the ZnO element 2. Are respectively disposed at the ends of the porcelain porcelain tube 4, and a support band 7 is mounted on the outer periphery of the porcelain porcelain tube 4. A safety cap 8 for protecting the line side terminal 5 is attached to the upper end of the porcelain porcelain tube 4.

  The internal element 3 includes two ZnO elements 2 that are spaced apart from each other, a series gap 9 interposed between the two ZnO elements 2, and a ZnO element 2 located above the line-side terminal. 5 and a spring 10 electrically connected. Each of the series gap 9 and the spring 10 is composed of a plurality of parts. The line-side terminal 5 is composed of a plurality of parts and is hermetically attached to the upper end portion of the porcelain porcelain tube 4 by two seal members 11 and 12. Furthermore, the ground side terminal 6 is electrically connected to the ZnO element 2 positioned below, and is hermetically attached to the lower opening of the porcelain porcelain tube 4 via the O-ring 13. The ground side terminal 6 has a terminal fitting 14 that seals the lower opening of the porcelain porcelain tube 4, and the terminal fitting 14 extends from the peripheral edge of the bottom surface of the porcelain porcelain tube 4 to the lower side wall portion of the porcelain porcelain tube 4. It has the flange part 14a to join. The support band 7 is detachably attached to the outer periphery of the porcelain porcelain tube 4 with bolts and nuts, and is used to attach the lightning arrester 1 to the power distribution facility.

  A recycling method of the lightning arrester 1 having the above configuration will be described in detail with reference to FIGS. 1 and 2.

  In the recycling method in this embodiment, as shown in FIG. 1, the porcelain soot tube 4 and the safety cap 8 are used for reassembly as components that can be regenerated by cleaning after visual inspection. The ZnO element 2 and the series gap 9 which are the internal elements 3 housed in the porcelain porcelain tube 4 are subjected to a predetermined electrical inspection, separated into those that can be reproduced and those that cannot be reproduced, and can be reproduced. To use for reassembly. The support band 7 is used for reassembly as a reproducible component after exchanging the nameplate and the like. About the ground side terminal 6, since the metal fitting 14 for terminals is cut | disconnected at the time of a disassembly, it is provided to a metal recovery company etc. as a non-recyclable component (material recycling). In addition, regarding the internal element 3 and the line side terminal 5, non-recyclable metal components are handled as material recycling. The line-side terminal seal members 11 and 12 and the ground-side terminal O-ring 13 are disposed as landfills as non-recyclable components (industrial waste).

  As shown in FIG. 2, this recycling method includes an inspection process, a disassembly process, a separation process, a cleaning process, and a reassembly process. In the inspection process, an external structure inspection and a characteristic test of each component of the lightning arrester 1 are performed. In the disassembling process, the exterior parts (safety cap 8 and support band 7) are removed, the ground side terminal 6 is disassembled, the internal element 3 is taken out, and the line side terminal 5 is disassembled. In the separation process, each component disassembled in the disassembly process is evaluated by separating it into those that can be regenerated and those that cannot be regenerated. The packing is treated as industrial waste. In the cleaning process, recyclable components are cleaned by, for example, ultrasonic cleaning. In the reassembly process, the metal or packing that has been made non-renewable components are replaced as replacement parts, and the body of the lightning arrester 1 is assembled together with the recyclable components, and then the characteristic test is performed. After assembling the safety cap 8 and the support band 7), the external structure is inspected, and the product is packed and shipped.

  Hereinafter, the above-described inspection process, disassembly process, separation process, cleaning process, and reassembly process will be specifically described.

  In the inspection process, an external structure inspection and a characteristic test of each component of the lightning arrester 1 are performed. For appearance structure inspection, if the surface of the porcelain porcelain tube 4 is cracked, chipped, or cracked (possible mechanical performance degradation due to drop impact), or has an arc trace (possible insulation degradation), for terminals When there is a bulge or pinhole in the metal fitting 14 (there is a bulge due to an increase in internal pressure due to Joule heat or a decrease in insulation due to the pinhole), there is a deposit on the surface of the porcelain porcelain tube 4 and it is unlikely that it can be easily removed. If it is a case (cause of deterioration of insulation due to creeping contamination), considering that it may not be safely disassembled or defective parts may be mixed in recycled parts, it is basically treated as industrial waste. Is good. Similarly, in the characteristic test, for example, when the insulation resistance value or the commercial frequency discharge start voltage is lower than the specified value (there is a possibility that the insulation may be lowered), Considering the possibility of mixing defective products, it is better to treat it as industrial waste as it is.

  In the disassembling process, the exterior parts (safety cap 8 and support band 7) are removed, the ground side terminal 6 is disassembled, the internal element 3 is taken out, and the line side terminal 5 is disassembled. In removing the exterior parts, the safety cap 8 and the support band 7 are removed from the porcelain porcelain tube 4 as shown in FIG. At this time, as shown in FIG. 5, small parts such as bolts, nuts, and nameplates attached to the line side terminal 5, the ground side terminal 6, and the support band 7 are also removed as appropriate.

  The disassembly of the ground side terminal 6 in this disassembly process will be described in detail below. As shown in FIG. 6, the disassembling apparatus for disassembling the ground side terminal 6 is arranged in parallel with the rotating mechanism 15 for rotating the porcelain porcelain tube 4 in a standing position and the porcelain porcelain tube 4, and is free of rotation. The disc-shaped cutting blade 16 held in the state, the porcelain porcelain tube 4 and the disc-shaped cutting blade 16 are relatively moved, and the disc-shaped cutting portion of the terminal metal fitting 14 sealed at one end of the porcelain porcelain tube 4 is disc-shaped. And a transfer mechanism 17 that enables the cutting blade 16 to come into contact therewith.

  The rotating mechanism 15 in this dismantling apparatus is placed on a base portion 18 that holds a posture in which the porcelain soot tube 4 is vertically erected, and is rotatable in a state where the upper portion of the porcelain soot tube 4 is pressed downward by the presser portion 19. To support. The disc-shaped cutting blade 16 is disposed on the side of the flange portion 14a of the terminal metal fitting 14 attached to the porcelain porcelain tube 4, and is held in a rotation-free state. The edge angle of the disc-shaped cutting blade 16 is set to 30 to 50 °. The transfer mechanism 17 has a structure in which the disc-shaped cutting blade 16 is slid in the horizontal direction so as to be close to and away from the porcelain porcelain tube 4 rotating at a fixed point. The rotating mechanism 15 described above is provided with a mechanism for moving the porcelain porcelain tube 4 in the vertical direction in order to adjust the cutting position with respect to the terminal fitting 14 of the porcelain porcelain tube 4. This vertical position adjusting mechanism can also be provided in the transfer mechanism 17 described above.

  When disassembling the ground-side terminal 6 attached to the porcelain porcelain tube 4, the porcelain porcelain tube 4 is placed in a state where the porcelain porcelain tube 4 is erected and placed on the base portion 18 of the rotating mechanism 15 and the upper portion thereof is held by the holding portion 19. Rotate. The disc-shaped cutting blade 16 is slid in the proximity direction with respect to the rotating porcelain porcelain tube 4 and aligned. The vertical alignment of the disc-shaped cutting blade 16 may be performed by moving either the porcelain porcelain tube side or the disc-shaped cutting blade side in the vertical direction. In this alignment, the disc-shaped cutting blade 16 is brought into contact with the planned cutting position of the flange portion 14a of the terminal fitting 14 of the ground side terminal 6. For example, the position of about 3 to 5 mm from the bottom surface of the terminal fitting 14 is appropriate. It is.

  In this way, by bringing the disc-shaped cutting blade 16 into contact with the terminal metal fitting 14, the disc-shaped cutting blade 16 is rotated by the rotation of the porcelain soot tube 4 (direction A in FIG. 6). It rotates in the opposite direction (B direction in the figure). In this state, the disc-shaped cutting blade 16 is cut into the terminal fitting 14 by sliding the cutting blade 16 in the horizontal direction so as to be close to the porcelain porcelain tube 4 by a predetermined amount. Due to the mutual rotation of the cylindrical cutting blades 16 (the two rotating directions are opposite directions), the terminal metal fittings 14 are both cut. Thereby, the cut | disconnected metal fitting 14 for terminals and O-ring 13 can be isolate | separated, and the internal element 3 of the porcelain porcelain tube 4 can be taken out (refer FIG. 7).

  In disassembling the ground-side terminal 6, the use of the disk-shaped cutting blade 16 described above makes it difficult for frictional heat to be generated at the time of cutting. Even if it is close to the O-ring 13 interposed between the two, it is possible to suppress the generation of harmful gas in maintaining the insulation of the lightning arrester 1. Moreover, the porcelain porcelain tube 4 is not damaged by cutting a portion close to the O-ring 13.

  After the disassembly of the ground terminal 6, the two ZnO elements 2, the series gap 9, and the spring 10 that are the internal elements 3 are taken out from the porcelain porcelain tube 4 as shown in FIG. Thereafter, the line-side terminal 5 is disassembled as shown in FIG. Since the line side terminal 5 is also hermetically attached to the porcelain porcelain tube 4 like the ground side terminal 6, the line side terminal 5 is removed with a dedicated tool while the porcelain porcelain tube 4 is fixed by a press machine or the like. . At this time, the two seal members 11 and 12 interposed between the line side terminal 5 and the porcelain porcelain tube 4 are also removed, and other components attached to the line side terminal 5 are also removed.

  Next, in the separation step, each component disassembled in the disassembly step is classified into a reproducible component and a non-reproducible component and evaluated. That is, from among the porcelain porcelain pipe 4, exterior parts (safety cap 8 and support band 7), internal element 3, parts of the line side terminal 5, and parts of the ground side terminal 6, reproducible components and non-reproducible parts Components are classified and evaluated based on inspection. In the evaluation based on the inspection of these components, recyclable components are used in the reassembly process, which is a subsequent process. Among non-recyclable components, those made of metal such as bolts and nuts are material recycled. The packings such as the O-ring 13 and the seal members 11 and 12 are treated as industrial waste. For example, when the surface of the safety cap 8 that is one of the exterior parts is cracked, chipped, cracked, or the like, the support band 7 that is another exterior part has an uncorrectable deformation. If the surface of the porcelain porcelain tube 4 is cracked, chipped, cracked, etc., the inside thereof is dirty, or the airtight part is scratched, there is an adhesion that does not peel off on the parts of the line side terminal 5 or the ground side terminal 6. If there is a dent or scratch, the surface of the ZnO element 2 that is the internal element 3 is cracked, chipped, cracked, etc., or if the specified value is not obtained in the characteristic test, the series gap 9 is cracked, chipped, When there are appearance defects such as cracks and discharge traces, there are cases where there are appearance defects such as uncorrectable deformations and dissolution traces of the spring 10.

  In the cleaning process, the components determined to be recyclable by the evaluation in the above-described separation process are cleaned by, for example, ultrasonic cleaning. The cleaning of the reproducible components is not limited to ultrasonic cleaning, and other cleaning methods can be employed.

  In the reassembly process, new parts can be exchanged as replacement parts using metals such as bolts and nuts and packings such as O-rings 13 and seal members 11 and 12 that have been made non-recyclable components, and can be recycled after cleaning. After assembling the main body of the lightning arrester 1 together with the component parts, the characteristic test is performed, the exterior parts (the safety cap 8 and the support band 7) are assembled, the external structure inspection is performed, and the product is packed and shipped.

It is a flowchart for demonstrating handling of each component until it assembles | assembles after dismantling a power distribution arrester in embodiment of the recycling method of the power distribution arrester which concerns on this invention. It is a flowchart explaining the recycling method of the lightning arrester for power distribution for every process. It is a front view which shows the structural example of the lightning arrester for power distribution, and a right half is shown with a cross section. It is a front view which shows the structural example of the lightning arrester for power distribution, and shows a part of safety cap in a cross section. It is a front view which shows the structural example of the lightning arrester for power distribution, and shows the state which removed the safety cap. It is the schematic which shows the dismantling apparatus which disassembles the ground side terminal of the lightning arrester for power distribution. It is a front view which shows the state which cut | disconnected the metal fitting for terminals of the ground side terminal, and isolate | separated from the ceramic porcelain tube. It is sectional drawing which shows the state which took out the internal element from the ceramic porcelain tube. It is a partial expanded sectional view which shows the line side terminal of the lightning arrester for power distribution.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lightning arrester for power distribution 2 ZnO element 3 Internal element 4 Porcelain porcelain pipe 5 Line side terminal 6 Ground side terminal 7 Support band (exterior part)
8 Safety cap (exterior parts)
DESCRIPTION OF SYMBOLS 9 Serial gap 10 Spring 11, 12 Seal member 13 O-ring 14 Terminal metal fitting 15 Rotation mechanism 16 Disc-shaped cutting blade 17 Transfer mechanism 18 Base part 19 Press part

Claims (4)

At least a ZnO element is accommodated in the porcelain porcelain tube, and a line side terminal and a ground side terminal electrically connected to the ZnO element are respectively disposed at end portions of the porcelain porcelain tube, and the ground side terminal The terminal metal fitting is sealed to one end of the porcelain porcelain tube via an O-ring, and in a distribution lightning arrester installed in a distribution system in which exterior parts are mounted on the porcelain porcelain tube, sealed to one end of the porcelain porcelain tube. A rotation-free disc-shaped cutting blade is brought into contact with the planned cutting position of the terminal fittings attached, and the porcelain soot tube is rotated to follow the rotation of the porcelain soot tube so that the cutting blade is rotated with the rotation of the porcelain soot tube. on the opposite direction while rotating to dismantle the power distribution arrester by bisecting the bracket for the terminal, and sorting and evaluate the components of the surge arrester, of said component, renewable components Through the washed new exchange nonrenewable components with reuse renewable component, the method of recycling the power distribution arrester, characterized in that assemble them reuse and new components as power distribution arrester. The recycling method of the lightning arrester for power distribution according to claim 1 , wherein a blade edge angle of the disk-shaped cutting blade is 30 to 50 °. At least a ZnO element is accommodated in the porcelain porcelain tube, and a line side terminal and a ground side terminal electrically connected to the ZnO element are respectively disposed at end portions of the porcelain porcelain tube, and the ground side terminal A device for dismantling a power distribution arrester in which a terminal metal fitting is sealed to one end of the porcelain porcelain tube via an O-ring,
A rotating mechanism for rotating the porcelain porcelain tube in a fixed posture; a disc-shaped cutting blade that is juxtaposed to the porcelain porcelain tube and held in a rotation-free state; and the porcelain porcelain tube and the cutting blade are relatively And a transfer mechanism that enables the disc-shaped cutting blade to come into contact with the planned cutting location of the terminal metal fitting, and by bringing the disc-shaped cutting blade into contact with the planned cutting site of the terminal metal fitting, An apparatus for dismantling a lightning arrester for power distribution, characterized in that the disc-shaped cutting blade can be rotated in a direction opposite to the rotation of the porcelain soot tube following the rotation of the porcelain soot tube. The device for dismantling a lightning arrester for power distribution according to claim 3 , wherein a blade edge angle of the disk-shaped cutting blade is 30 to 50 °.

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