JP2012222910A - Volume reduction method for twisted cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a volume reduction method for twisted cable that divides a high-rigidity twisted cable for electric power into single-core cables in a simple manner and making a coating material (sheath part) into chips.SOLUTION: The volume reduction method for twisted cable that reduces the volume of a sheath part by separating a single-core cable of the twisted cable formed by twisting a plurality of single-core cables into an electric wire and the sheath part includes: a cutting process of cutting the twisted cable to a predetermined length; a dividing process of dividing the cut twisted cable into a plurality of single-core cables; a peeling process of peeling the electric wire and the sheath part of each divided single-core cable from each other; and a crushing process of crushing the peeled sheath part.

Description

  The present invention relates to a volume reduction method for a twisted cable in which a twisted power cable configured by twisting a plurality of single core cables is divided into single core cables and a covering material (sheath portion) is formed into chips.

  A twisted power cable laid in a power plant or the like needs to be replaced when it deteriorates. Since the electric wire (copper wire) in the cable is covered with a sheath part and there is a concern that the sheath part is contaminated with radiation, the sheath part of the cable removed at the time of replacement must be safely disposed of. However, if it is discarded as a stranded cable, a large disposal space is required, which is a problem.

  As the power cable, a multi-core stranded cable configured by twisting a plurality of (for example, three) single-core cables is used. The multi-core stranded cable is configured by adhering single-core electric wires together with a fire spread inhibitor (including asbestos) as a sheath portion of the single-core cable. Therefore, the connection between the single-core electric wires is strong, and the rigidity of the cable is increased.

  If an attempt is made to divide a twisted cable in order to reduce the waste space, the twisted cable has high rigidity as described above. Therefore, if it is performed manually, enormous time and labor are required and there is a risk. Moreover, even if it divides | segments by human power, since a sheath part will be exposed, there exists a possibility that asbestos scattering may have a bad influence on an operator.

  Conventionally, there exists a thing shown by patent document 1 (Unexamined-Japanese-Patent No. 2001-351450) as processing of a sheath material covering waste electric wire. In Patent Document 1, a sheath material-covered waste electric wire is divided and cut into a plurality of pieces by a cutting device, each of the divided cuts is sequentially passed between grooved rolls of a compression peeling machine, and the sheath material and the electric wire are peeled by pressurization. Next, a processing method is shown in which both are separated and the wires are collected, while the sheath material is pulverized and extruded with an extruder to form a pellet-like compound.

JP 2001-351450 A

  However, the processing method shown in Patent Document 1 has complicated processes such as washing the electric wire and the sheath member in order to reuse the electric wire and the sheath member, and separating the electric wire and the sheath member after washing. It is not suitable for processing.

  In other words, the twisted power cable is firmly bonded by twisting a plurality of single-wire cables. Therefore, even if a pressure is applied between the grooved roll and the pressure roll shown in Patent Document 1, the twisted power cable is rigid. Therefore, it cannot be cut easily. Moreover, even if it can cut, since a cable is not cut along the twist direction, it is difficult to peel a sheath material and an electric wire.

  In view of the above problems, the present invention provides a method for reducing the volume of a twisted cable by dividing a high-strength twisted cable for power into a single-core cable by a simple method and reducing the volume of the covering material (sheath portion). The purpose is to provide.

In order to solve the above problems, the present invention reduces the volume of a twisted cable in which a single core cable of a twisted cable configured by twisting a plurality of single core cables is separated into an electric wire and a sheath portion to reduce the sheath portion. In the method
A cutting step of cutting the twisted cable into a predetermined length;
A dividing step of dividing the cut twisted cable into a plurality of single-core cables;
A peeling step of peeling the split single-core cable into the electric wire and the sheath part;
It comprises a crushing step of crushing the peeled sheath part.

  Further, in the volume reduction method for the twisted cable described above, in the state where the twisted cable cut into a predetermined length in the splitting step is held by a cable guide, the twisted cable is pressed against the split blade. It is divided into a plurality of single-core cables.

  Further, in the volume reduction method of the twisted cable described above, the sheath part and the electric wire are separated by cutting the sheath part of the single-core cable divided in the dividing step in the peeling step. .

  Further, in the volume reduction method for the twisted cable described above, the sheath portion of the cable peeled off in the peeling step is crushed into chips in the crushing step.

  Further, in the volume reduction method of the twisted cable described above, the twisted cable is twisted while the split blade and the twisted cable rotate relatively by pressing the twisted cable against the split blade in the dividing step. It is divided into a plurality of single core cables along the direction.

  In the volume reduction method for the twisted cable described above, the twisted cable is rotated along the twisting direction while the split blade rotates the twisted cable by pressing the twisted cable against the split blade in the dividing step. And dividing into a plurality of single-core cables.

  Further, in the volume reduction method for the twisted cable described above, the split blade is rounded at the tip, and the twisted cable is pressed against the split blade, thereby tearing the sheath portion of the twisted cable. It is characterized by being divided into core cables.

  According to the present invention, it is possible to easily and surely reduce the volume of a twisted cable by dividing a highly rigid twisted cable for electric power into single-core cables and forming a sheath portion of the single-core cable as a chip. it can.

It is explanatory drawing of the cutting process of the twisted cable of this invention Example. It is a block diagram of the split device of the twisted cable used by this invention Example. It is a block diagram of the dividing blade of a dividing device similarly. It is explanatory drawing of the division | segmentation process of this invention Example. It is a block diagram of the stripping machine which isolate | separates a single core cable into a sheath part and an electric wire. It is explanatory drawing of the peeling process of this invention Example. It is a block diagram of the grinder used by the Example of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory diagram of a cutting process of a twisted cable. 1 is a stranded cable for electric power, and is formed by twisting three single-core cables 5a, 5b, and 5c as shown in FIG. 1 (b), and includes asbestos as a sheath portion between the single-core cables. It is firmly bonded with a fire spread inhibitor 5d. In addition, 5e shows the center position of the twisted cable 5.

  In FIG. 1A, reference numeral 6 denotes a cutter, which cuts the twisted cable 5 to a predetermined length by closing cutting blades 6a and 6b in the direction of an arrow by a built-in actuator (not shown). The predetermined length is slightly longer than the length dimension of the cable guide of the dividing device used in the dividing step described later.

  FIG. 2 is a configuration diagram of a dividing device that divides the twisted cable 5 cut into a predetermined length. 1 is a dividing unit that divides the twisted cable 5 into single-core cables, 3 is a cable pressing unit that presses the twisted cable against the dividing unit 1, and 2 is installed between the pressing unit 3 and the dividing unit 1. This is a cable guide that slides and guides the twisted cable in a state in which the bending (bending) of the twisted cable is suppressed at the time of pressing to the portion 1. Reference numeral 4 denotes a pedestal on which the above-described parts are mounted, and includes a moving wheel 4a and a fixed leg 4b, and is configured to be easily movable to a cable disposal site.

  The dividing portion 1 is composed of a dividing blade 1a and a fixing portion 1b that supports the blade. The split blade 1a is attached to the fixed portion 1b in a state where the position is adjusted in the vertical and horizontal directions by bolts (not shown). As shown in FIG. 3, the split blade 1 a is composed of a plurality of blades 1 a 1, 1 a 2, 1 a 3. In this case, the split blades 1 a are separated equally by 120 ° in accordance with the three single core cables constituting the twisted cable 5. It consists of three fixed blades.

  A projection 1e for alignment with the central position 5e of the cable 5 is provided at the central position where each blade intersects. Furthermore, when the single core cable of the twisted cable is divided, the cutting edge of each blade is provided with a roundness 1f suitable for tearing a hard fire spreader, and at the same time, the cutting edge of the cutting edge is prevented.

  As shown in FIG. 2, the cable guide 2 has a pipe shape of a split structure composed of a bottom 2a and a lid 2b, and both are connected by a hinge 2c so as to be opened and closed. The inner diameter dimension of the cable guide 2 is set to be slightly larger than the outer diameter dimension of the twisted cable, and when the twisted cable is sandwiched between the bottom portion 2a and the lid 2b, the bending (bending) of the cable is forcibly suppressed. The cable guide 2 is attached to the inner surface of the bottom 2a and the lid 2b with a Teflon (registered trademark) sheet (not shown) having a low frictional resistance.

  Further, the cable guide 2 has an inner diameter adjusting member (not shown) attached to the inner surfaces of the bottom 2a and the lid 2b so that it can cope with the difference in outer diameter of the twisted cable 5 sandwiched between them. A Teflon (registered trademark) sheet is attached to the sheet. Thus, by interposing the inner diameter adjusting member, the inner diameter of the cable guide 2 can be adjusted, and the cables 5 having different outer diameters can be handled.

  As shown in FIG. 2, the cable pressing portion 3 is rotatably attached to a hydraulic pump 3a, a hydraulic cylinder 3b driven by the pump, a piston shaft 3c moving in the hydraulic cylinder 3b, and a tip of the piston shaft 3c. The elastic member 3e is attached to the contact surface with the cable 5 which is the tip of the pressing member 3d.

  As shown in FIG. 2, the dividing portion 1, the cable guide 2, and the cable pressing portion 3 are arranged in a line on the gantry 4 in order.

  Next, the dividing process of the cable 5 will be described with reference to FIG. First, the gantry 4 is moved and installed at the site where the cable is disposed. The site where the disposal process is performed is a site where cables to be discarded are installed. As shown in FIG. 4A, the cable 5 cut to a predetermined length in the cutting step is placed on the bottom 2 a with both ends protruding from both ends of the cable guide 2.

  At this time, the positions of the center 5e of the tip 5g of the cable 5 and the projection 1e of the split blade 1a are matched. Further, the blades of the blades 1a1, 1a2, 1a3 of the split blade 1a are aligned so that the blade spreaders 5d between the single-core cables shown in FIG. Next, the lid 2b is closed as shown in FIG.

  In this state, the elastic member 3e at the front end of the pressing member 3d faces the rear end 5f of the cable 5. Next, the piston shaft 3c of the hydraulic cylinder 3b is moved by driving the hydraulic pump 3a, and the elastic member 3e presses the rear end 5f of the cable 5. As shown in FIG. 4 (c), the tip 5g of the cable 5 is pressed against the separating blade 1a, and each blade 1a1, 1a2, 1a3 bites into each fire spreader 5d portion between the single-core cables to be cut. To go. By this tearing, the three single-core cables 5a, 5b, and 5c are separated. As shown in FIG. 4 (d), the separated three single-core cables 5a, 5b, and 5c are connected to the blades 1a1, 1a2, respectively. 1a3 and pushed forward.

  As described above, when the fire spreader 5d bites into and tears, the split blade 1a bites in along the twist direction, so that the twisted cable 5 and the split blade 1a rotate relatively. . In this embodiment, since the split blade 1a is fixed, the split blade 1a cuts the fire spread inhibitor 5d along the twist direction while rotating the twisted cable 5. Note that the pressing member 3d also rotates when the twisted cable rotates.

  When the division proceeds and the dividing blade 1a divides up to the rear end 5f of the cable 5, the division of the single-core cable of the cable 5 is completed. At this time, as shown in FIG. 4B, the pressing member 3d comes into contact with the tip of the split blade 1a, but the elastic member 3e at the tip comes into contact with the tip of the split blade 1a, so that the cutting edge of the split blade 1a is damaged. I will not let you.

  The cable 5 to be discarded has already been deformed with the removal from the equipment, but the cable guide 2 forcibly corrects the deformation. Therefore, the portion of the cable 5 that is divided by being pressed against the dividing blade 1a has little positional deviation, and the division is performed smoothly. Further, as described above, when the cable 5 is separated by the split blade 1a that is fixedly installed, the cable 5 moves while rotating along the twisting direction. Slide to move. And since the pressing member 3d of the cable pressing part 3 also rotates, rotation of the cable 5 is not inhibited.

  When the cable 5 is moved with complicated movement as described above, a Teflon (registered trademark) sheet (sliding member) having a low frictional resistance is attached to the inner surface of the cable guide 2 so that the cable 5 can be smoothly moved. The twisted cable can be smoothly divided into single cores.

  Therefore, the twisted power cable can be divided easily and in a short time at the site where the disposal process is performed.

  Next, the peeling process which peels the single core cables 5a, 5b, and 5c divided | segmented at the said separation process into an electric wire and a sheath part is demonstrated using FIG. 5, FIG. FIG. 5 is a block diagram of the stripping machine, and FIG. 6 is an explanatory diagram of the stripping process. 7 is a peeling machine main body, 7a and 7b are grooved rollers having various widths 7a1 (the roller 7b is not shown), and both rollers are arranged vertically so that the convex blades forming the grooves are in contact with each other. Yes.

  7c to 7g are insertion holes for single-core cables, and have different inner diameters in accordance with the outer diameter dimensions of the cables. Each insertion hole is arranged so that the inserted single-core cable faces between the grooved rollers 7a and 7b shown in FIG. The divided single-core cables 5a, 5b, and 5c are configured by an internal electric wire (copper wire) 5h and a sheath portion 5d around the internal electric wire (copper wire) 5h.

  In order to peel the single-core cable into the electric wire 5h and the sheath portion 5d, the single-core cable is inserted into an insertion hole having a suitable size. As shown in FIG. 6, the inserted single-core cable is introduced between the grooved rollers 7 a and 7 b and is sandwiched between both rollers. The single-core cable is cut by cutting the sheath portion 5d with convex blades by the rotation of both rollers in the arrow direction, and the internal electric wire 5h is peeled off from the sheath portion 5d. The peeled electric wire 5h is subjected to processing for reuse (not shown), and the volume of the sheath portion 5d is reduced in the next step.

  Next, the pulverization process for reducing the volume of the sheath part 5d peeled in the peeling process will be described with reference to FIG. Reference numeral 8 denotes a pulverizer, which includes a hopper 8a and a pulverizing unit 8b. The pulverizing unit 8b includes a rotating pulverizing blade (not shown). The sheath portion 5d peeled off in the peeling step of FIG. 6 is put into the hopper 8a and crushed into chips by the pulverizing blade of the pulverizing portion 8b to become the tip 5i. The chip 5i is filled in a container (such as a drum can) installed below. Since the chip filled in the container 9 may be radioactively contaminated, it is transported to a predetermined place and stored.

  The volume can be significantly reduced by grinding the sheath portion 5d into the tip 5i. For example, compared with the case where the long sheath portion 5d and the tip 5i peeled in the peeling step of FIG. 6 are put in the container 9, the tip 5i is filled 3.6 times or more than the long sheath portion 5d. be able to.

  As described above, according to the volume reduction method of the present embodiment, after the twisted cable is divided into single-core cables, the sheath portion is crushed by peeling off the wire and the sheath portion. Even a power cable of the shape can be reduced easily and effectively.

  DESCRIPTION OF SYMBOLS 1 ... Split part, 1a ... Split blade, 1b ... Fixed part, 1a1, 1a2, 1a3 ... Blade, 1c, 1d ... Bolt, 1e ... Projection, 2 ... Cable guide, 2a ... Bottom part, 2b ... Guide lid, 2c ... Hinge 2d, 2e ... sliding member, 2f, 2g ... inner diameter adjusting member, 3 ... cable pressing part, 3a ... hydraulic pump, 3b ... hydraulic cylinder, 3c ... piston shaft, 3d ... pressing member, 3e ... elastic member, 4 ... Base, 4a ... moving wheel, 4b ... fixed leg, 5 ... twisted cable, 5a, 5b, 5c ... single core (single core cable), 5d ... sheath part (fire spread prevention member), 5e ... center of cable tip, 5f ... rear end of cable, 5g ... front end of cable, 5h ... electric wire, 5i ... tip, 7 ... peeling machine, 7a, 7b ... grooved roller, 8 ... crusher, 8a ... hopper, 8b ... crushing part.

Claims (7)

In the volume reduction method of the twisted cable, the single core cable of the twisted cable configured by twisting a plurality of single core cables is separated into the electric wire and the sheath part, and the sheath part is reduced in volume.
A cutting step of cutting the twisted cable into a predetermined length;
A dividing step of dividing the cut twisted cable into a plurality of single-core cables;
A peeling step of peeling the split single-core cable into the electric wire and the sheath part;
A volume reduction method for a twisted cable, comprising a crushing step of crushing a peeled sheath part. In the volume reduction method of the twisted cable according to claim 1,
In the splitting step, the twisted cable is divided into a plurality of single-core cables by pressing the twisted cable cut into a predetermined length with a cable guide against the split blade. How to reduce the volume of the cable. In the volume reduction method of the twisted cable according to claim 1 or 2,
A volume reduction method for a twisted cable, wherein the sheath portion and the electric wire are separated by cutting the sheath portion of the single-core cable divided in the dividing step in the peeling step. In the volume reduction method of the twisted cable in any one of Claims 1-3,
A volume reduction method for a twisted cable, characterized in that, in the crushing step, the sheath portion of the cable peeled in the peeling step is crushed into chips. In the volume reduction method of the twisted cable according to claim 2,
In the dividing step, the twisted cable is pressed against the split blade to split the twisted cable into a plurality of single-core cables along the twist direction while the split blade and the twisted cable rotate relatively. To reduce the volume of the twisted cable. In the volume reduction method of the twisted cable according to claim 5,
In the dividing step, the twisted cable is divided into a plurality of single-core cables along the twisting direction by pressing the twisted cable against the dividing blade while the dividing blade rotates the twisted cable. To reduce the volume of the cable. In the volume reduction method of the twisted cable in any one of Claims 2-6,
The split blade is rounded at the tip, and the twisted cable is split into a plurality of single-core cables by cutting the sheath portion of the twisted cable by pressing the twisted cable against the split blade. Yong method.

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