JP2010142008A - Vibration preventing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration preventing device suppressing breakage of stranded wires and preventing a heavy weight from falling in advance by detecting damage of the stranded wires in an early stage. <P>SOLUTION: The vibration preventing device has: an electric wire grip portion for gripping an overhead electric wire; a stranded wire portion constituted of a plurality of stranded wires and having a substantial center portion fixed to the electric wire grip portion; and heavy weight portions arranged on both the sides of the stranded wire portion. The stranded wire portion has: a composite core wire portion formed by combining a carbon-based fiber material, and a steel wire portion arranged so as to twist the surround of the composite core wire portion. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vibration preventing device attached to an overhead power transmission line.

  Generally, a slight wind vibration is generated by a slight wind on an overhead power transmission line connected between steel towers. This slight wind vibration has caused breakage due to fatigue of the overhead power transmission line resulting from vibration, wear and damage of the overhead power transmission line and metals such as a steel tower over which the overhead power transmission line is stretched. For this reason, the overhead power transmission line is conventionally provided with an electric wire damper as a vibration preventing device that suppresses this slight wind vibration.

  The electric wire damper is normally fixed to a clamp that holds the overhead power transmission line, a stranded wire that is supported by the clamp and extends in a horizontal direction substantially parallel to the overhead power transmission line, and eccentrically fixed to both ends of the stranded wire. And a weight. In the electric wire damper configured as described above, the weights provided at both ends of the stranded wire perform the pendulum motion alternately in the vertical direction by the slight wind vibration. And the strand is twisted by the pendulum movement of the weight, and the vibration energy of the overhead power transmission line is converted into the strand wire itself or the friction energy between the strands to be dissipated. Yes.

  By the way, when the electric wire damper comprised as mentioned above attaches an electric wire damper to an aerial transmission line, the stress which generate | occur | produces from a self-weight etc. arises in the junction part of a stranded wire and a weight and a stranded wire. In addition, steel wire is usually used for the wire damper. For this reason, the wire damper has a problem that there is a risk that the stranded wire may be broken due to damage and wear due to vibration fatigue or corrosion of the stranded wire and a heavy load of the weight, and the weight may fall to the ground.

In response to this, a vibration preventing device is disclosed in which a wire rope for fall prevention is attached to the wire gripping portion and the weight portion of the wire damper to prevent the weight from falling (for example, refer to Patent Document 1). .
JP 2006-230172 A

  However, the vibration preventing device disclosed in Patent Document 1 requires a wire rope to be attached to the electric wire gripping portion or the weight portion because it is necessary to separately attach the wire rope for preventing the fall to the electric wire gripping portion or the weight portion. There was a problem of becoming.

  The present invention has been made in view of the above-described problem, and prevents vibration of the weight by preventing breakage of the weight by suppressing breakage of the twisted wire and enabling early detection of breakage of the twisted wire. An object is to provide an apparatus.

  (1) The vibration preventing device of the present invention includes an electric wire gripping portion capable of gripping an overhead electric wire, a stranded wire portion that is configured by a plurality of wires, and whose substantially central portion is fixed to the electric wire gripping portion, and the stranded wire portion. Weight portions fixed to both ends of the wire, and the twisted wire portion is disposed so as to twist around the composite core wire portion and a composite core wire portion formed by combining carbon fiber materials. A steel wire portion.

  (2) Moreover, it is preferable that the said composite core wire part and / or the said weight part are provided with the alerting | reporting means which alert | reports the damage of the said strand wire part.

  (3) Moreover, it is preferable that the said composite core wire part is embed | buried with the filling material which supplements the intensity | strength at the time of damage.

  (4) Moreover, the said notification means is comprised by providing the visual recognition part by which the predetermined coating material was apply | coated to the said composite core wire part and / or the said weight part so that visual recognition at the time of the damage of the said strand wire part was possible. preferable.

  (5) Moreover, it is preferable that the said filling material is the adhesive material enclosed in the microcapsule.

  ADVANTAGE OF THE INVENTION According to this invention, while preventing the breakage of a strand wire and making it possible to discover the breakage of a strand wire at an early stage, it is possible to provide a vibration preventing device that can prevent the weight from falling.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is an external perspective view showing an external configuration of a vibration preventing apparatus according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing an external configuration of the vibration preventing apparatus according to the embodiment. 3 is a cross-sectional view taken along the line AA showing the AA cross section of the stranded wire portion shown in FIG. 2. FIG. 4 is a cross-sectional view showing a cross section in the axial direction of the composite core wire portion of the vibration preventing device according to the embodiment. FIG. 5 is an external perspective view showing a crimp sleeve provided at a fixed portion of the vibration preventing device according to the embodiment and a weight fixed to the crimp sleeve. 6 is a BB cross-sectional view showing a BB cross section of the pressure-bonding sleeve provided in the fixing portion shown in FIG. 5. FIG. 7 is a partial enlarged view showing one end portion of the weight of the vibration preventing device according to the embodiment in the horizontal direction.

  An anti-vibration device 1 according to an embodiment of the present invention is an aerial transmission line that is installed on a support (not shown) such as a steel tower installed on the ground, and is aerial transported over a support such as a steel tower. It is attached to the electric wire W. The overhead power transmission line W is wired to a support such as a steel tower at a height of 20 to 30 m from the ground.

First, the overall configuration of the vibration preventing apparatus 1 according to the present embodiment will be described.
As shown in FIGS. 1 and 2, the vibration preventing device 1 includes an electric wire holding part 2 that holds the overhead power transmission line W, a stranded wire part 3 that is fixed to the electric wire holding part 2, and both ends of the stranded wire part 3. The weights 4a and 4b are fixedly provided.

  The electric wire gripping portion 2 is configured to grip the overhead power transmission line W so as to sandwich the outer peripheral surface of the overhead power transmission line W from one side and the other side. Specifically, the electric wire gripping portion 2 is disposed on one side of the outer peripheral surface of the overhead power transmission line W, and is disposed on the other side of the outer peripheral surface of the overhead power transmission line W and the clamp 20 that configures the appearance of the electric wire gripping portion 2. And a presser fitting 21 to be configured. The clamp 20 and the presser fitting 21 are formed so as to be fastened by a bolt 22.

  In the clamp 20, a first fitting groove 20 a that can be fitted to a part of the overhead power transmission line W is formed on the side facing the overhead power transmission line W. In addition, a second fitting groove 21 a that can be fitted to a part of the overhead power transmission line W is formed in the presser fitting 21 on the side facing the overhead power transmission line W.

  The electric wire gripping part 2 arranges the clamp 20 in a state where a part of the overhead transmission line W is fitted in the first fitting groove 20a on one side of the outer peripheral surface of the overhead transmission line W, and the overhead transmission line on the other side. The holding metal fitting 21 is arranged in a state in which a part of W is fitted in the second fitting groove 21a, and the clamp 20 and the holding metal fitting 21 are fastened by the bolt 22, so that the overhead power transmission line W is gripped. Is formed.

  Further, the wire gripping portion 2 is provided with a fixing portion 23 to which the stranded wire portion 3 is fixed. The fixing part 23 is provided at the end of the clamp 20. The fixing portion 23 fixes the stranded wire portion 3 so that the stranded wire portion 3 extends substantially parallel to the overhead power transmission line W. Specifically, the fixing portion 23 is provided with an insertion hole 24 through which the stranded wire portion 3 can be inserted, and the stranded wire portion 3 is fixed to the clamp 20 in a state of being inserted into the insertion hole 24.

  As shown in FIG. 3, the strand wire part 3 is comprised from the several wire. Specifically, a composite core wire 30 provided as a core wire in the axial center portion of the stranded wire portion 3 and a plurality of steel wires 31 arranged to twist the composite core wire 30 on the outer peripheral surface of the composite core wire 30 are provided. It is configured.

  As shown in FIG. 4, the composite core wire 30 includes a core wire portion 32 and a covering portion 33 that covers the core wire portion 32. The core wire portion 32 uses a fiber material such as carbon fiber or glass fiber as a fiber filament, and bundles a large number of them, twists them in a rope shape, or makes them circular in cross section by braiding or the like, or fiber reinforced them. It is made of plastic that has been molded and heat-treated. In the present embodiment, the core wire portion 32 is formed of carbon fiber reinforced plastic.

  The covering portion 33 is made of a synthetic resin. As the synthetic resin, for example, an olefin resin is used. Examples of olefin resins include ethylene, propylene, 1-butene, 2-butene, isobutene, 1-pentene, 2-pentene, 2-methyl-1-butene, 3-methyl-1-butene, and 2-methyl-2. -Butene, 1-hexene, 3-methyl-1-pentene, 4-methyl-1-pentene, 2-hexene, cyclohexene, 2,3-dimethyl-2-butene, 2,3-dimethyl-1-butene, α -What has monomers, such as pinene, those copolymers, etc. can be illustrated.

  In addition, the olefin-based resin may be used as a composition mixture as long as the properties as a molded article are not impaired. In addition, additives such as fillers, antioxidants, dispersants, colorants, weathering agents, flame retardants and the like that are generally used for olefin resins should be used as necessary for the olefin resins. You can also. Furthermore, carbon black may be added to the olefin-based resin, for example, in order to improve weather resistance.

  A plurality of microcapsules 34 in which an adhesive as an adhesive material is included on the outer peripheral surface are applied to the covering portion 33. The adhesive contained in the microcapsule 34 constitutes a filling material that compensates for the strength of the composite core wire 30 when the composite core wire 30 is damaged.

  For example, when the composite core wire 30 is bent or curved by applying damage to the composite core wire 30 by applying the microcapsule 34 to the outer peripheral surface of the covering portion 33, the composite core wire 30 is applied to the bent portion or the bent portion. When the capsule 34 is split and the encapsulated adhesive flows out, the bent portion or the curved portion related to the damaged portion of the composite core wire 30 is cured, and the damaged portion is compensated.

  As the adhesive contained in the microcapsule 34, a synthetic adhesive is used. For example, an acrylic resin adhesive, an α-olefin adhesive, a urethane resin adhesive, a cellulose adhesive, and an epoxy resin adhesive. Examples thereof include an adhesive, a chlorobrene rubber adhesive, a cyanoacrylate adhesive, a silicone adhesive, a styrene-butadiene rubber latex adhesive, and a prestyrene resin solvent adhesive.

  Moreover, the core wire part 32 and the coating | coated part 33 are closely_contact | adhered with the hot-melt-adhesive. Specifically, a hot melt adhesive is applied to the core wire portion 32, and a covering portion 33 is formed thereon. Any hot melt adhesive may be used as long as it can bond the core wire portion 32 and the covering portion 33, and may be a commercially available one. Examples of the base polymer of the hot melt adhesive include ethylene-vinyl acetate copolymer (EVA), polyethylene, atactic polypropylene (APP), ethylene-ethyl acrylate copolymer (EEA), polyamide, polyester, etc. Examples thereof include polycarbonate, polyvinyl ether, polyvinyl alcohol, polyurethane, and cellulose.

  As shown in FIGS. 5 and 6, crimp sleeves 35 a and 35 b are provided at both ends of the stranded portion 3. The crimp sleeves 35a and 35b are formed in a substantially cylindrical shape whose one end is sealed. The crimping sleeves 35 a and 35 b are inserted into one end portion of the stranded wire portion 3 from the other end side that opens, and are crimped at one end portion of the stranded wire portion 3. The crimp sleeves 35a and 35b are formed with male screw portions 36a and 36b at the ends. Male threads 36a and 36b are male threaded. The crimp sleeves 35a and 35b are made of a soft metal such as aluminum.

  The weights 4a and 4b are formed in a substantially spherical shape. In the weights 4a and 4b, fixed holes 40a and 40b are formed at positions eccentric from the center. The fixed holes 40a and 40b are provided with female screw portions 41a and 41b. The female screw portions 41a and 41b are screwed with the male screws of the male screw portions 36a and 36b provided in the crimping sleeves 35a and 35b. Possible female threads are cut. The weights 4a and 4b are fixed to both ends of the stranded portion 3 by screwing the female screw portions 41a and 41b to the male screw portions 36a and 36b of the crimping sleeves 35a and 35b.

  As shown in FIG. 7, the weights 4a and 4b are provided with visual recognition parts 42a and 42b as notification means at the horizontal ends when the weights 4a and 4b are fixed. A fluorescent paint is applied to the visual recognition parts 42a and 42b. The visual recognition parts 42a and 42b are not visible from the ground when the vibration preventing device 1 is in a normal state. For example, when the stranded wire part 3 is damaged by metal fatigue, corrosion, or the like and bent or curved, The weights 4a and 4b are provided so as to be visible when the weights 4a and 4b are hung by the stranded portion 3.

  According to the vibration preventing apparatus 1 of the present embodiment having the above-described configuration, the following effects are exhibited.

  The vibration preventing device 1 according to the present embodiment is configured to include a stranded wire portion 3 in which a composite core wire 30 formed of carbon fiber reinforced plastic is disposed at the axis. Therefore, it becomes possible to improve the abrasion resistance, heat resistance, acid resistance, and tensile resistance of the stranded portion 3. Thereby, for example, even when another steel wire 31 constituting the stranded wire portion 3 is damaged due to metal fatigue or the like, the weights 4a and 4b fixed at both ends thereof are immediately caused by the presence of the composite core wire 30. It becomes possible to prevent falling to the ground.

  Moreover, the vibration preventing apparatus 1 according to the present embodiment is formed so that the composite core wire 30 includes a core wire portion 32 formed of carbon fiber reinforced plastic and a covering portion 33 that covers the core wire portion 32. Moreover, the coating | coated part 33 is comprised using the olefin resin. Therefore, for example, even when the core wire portion 32 is damaged, it is possible to prevent the weights 4a and 4b from immediately falling to the ground due to the presence of the covering portion 33. That is, the tracking resistance of the composite core wire 30 can be improved. As a result, the vibration preventing device 1 can stably maintain the electric wire drop preventing function for a long period of time.

  Further, in the vibration preventing device 1 according to the present embodiment, the microcapsule 34 in which an adhesive is housed on the outer surface of the covering portion 33 is applied. Therefore, for example, when the composite core wire 30 is bent or curved due to damage to the composite core wire 30, the microcapsule 34 applied to the bent portion or the curved portion is split and the contained adhesive flows out, so that the composite core wire is discharged. It is possible to cure the bent portion or the curved portion related to the damaged portion 30 and to compensate the damaged portion. As a result, the vibration preventing device 1 can stably maintain the electric wire drop preventing function for a long period of time.

  Moreover, the vibration preventing apparatus 1 according to the present embodiment is provided with visual recognition portions 42a and 42b as notification means at the horizontal end portions of the weights 4a and 4b in a fixed state. The visual recognition parts 42a and 42b cannot be visually recognized from the ground when the vibration preventing device 1 is in a normal installation state. For example, when the stranded part 3 is bent or curved due to metal fatigue, corrosion, or the like, Is provided so as to be visible when, for example, the wire hangs down by the stranded portion 3. Therefore, when the stranded wire portion 3 is damaged, it is possible to immediately recognize the breakage of the stranded wire portion 3. That is, by making it possible to detect the breakage of the stranded portion 3 at an early stage, it is possible to prevent the weights 4a and 4b from dropping.

  Further, the vibration preventing device 1 according to the present embodiment is fixed to the twisted wire portion 3 in a state where the weights 4a and 4b are screwed into male screw portions 45a and 45b provided on the crimping sleeves 44a and 44b. . Therefore, the weights 4a and 4b are attached to the stranded portion 3 in a detachable state. Thereby, the vibration preventing apparatus 1 is easily maintained.

  In addition, this invention is not limited to the said embodiment at all, and the technical scope of this invention is not limited to these. For example, in the present embodiment, as a reporting means for notifying the breakage of the stranded portion 3, the fluorescent paint is applied to the visual recognition portions 42a and 42b provided at the ends of the weights 4a and 4b, and the stranded portion 3 is broken. Thus, the weights 4a and 4b hang down, and the fluorescent paint is visually recognized from the ground to notify the breakage of the stranded portion 3. However, the present invention is not limited to this. For example, a configuration in which a light emitting member such as an LED is disposed on the visual recognition portions 42a and 42b may be used, or a configuration in which a seal or the like is attached may be used. The informing means may be any means as long as the weights 4a and 4b hang down when the stranded wire portion 3 is damaged, and the visual recognition portions 42a and 42b are visible from the ground.

  In addition, for example, a microcapsule in which a fluorescent paint is encapsulated is applied to the stranded portion 3, and the stranded wire portion 3 is broken and bent or bent, so that the fluorescent paint is applied from the microcapsule near the bent portion or the bent portion. It is good also as a structure which discharge | releases and uses this as an alerting | reporting means.

  Further, for example, a fluorescent paint is applied to the covering portion 33 so that the fluorescent paint on the covering portion 33 can be exposed when a plurality of steel wires 31 provided around the covering portion 33 are damaged due to metal fatigue, corrosion, or the like. It is good also as composition to do.

  In the present embodiment, the microcapsule 34 is applied to the outer surface of the covering portion 33. However, the present invention is not limited to this. For example, the microcapsule 34 may be configured to be mixed in the covering portion 33 and to be internally provided inside the covering portion 33.

1 is an external perspective view showing an external configuration of a vibration preventing apparatus according to an embodiment of the present invention. It is a disassembled assembly figure which shows the external appearance structure of the vibration preventing device which concerns on the said embodiment. It is AA sectional drawing which shows the AA cross section of the strand wire part shown in FIG. It is sectional drawing which shows the cross section in the axial direction of the composite core wire part of the vibration preventing apparatus which concerns on the said embodiment. It is an external appearance perspective view which shows the crimping sleeve provided in the fixed part of the vibration prevention apparatus which concerns on the said embodiment, and the weight fixed to a crimping sleeve. It is BB sectional drawing which shows the BB cross section of the crimping sleeve provided in the adhering part shown in FIG. It is the elements on larger scale which show the one end part in the horizontal direction of the weight of the vibration preventing apparatus which concerns on the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibration prevention apparatus 2 Electric wire holding part 3 Stranded wire part 4a, 4b Weight 20 Clamp 21 Holding metal 30 Composite core wire 31 Steel wire 32 Core wire part 33 Covering part 34 Microcapsule 40a, 40b Fixed part 41a, 41b Female thread part 42a , 42b Visual recognition part W Overhead power transmission line (overhead wire)

Claims (5)

An electric wire gripper capable of gripping an overhead electric wire;
Consists of a plurality of wire rods, and a stranded wire portion whose substantially central portion is fixed to the wire gripping portion;
A weight portion fixed to both ends of the stranded wire portion, and
The stranded portion is
A composite core wire portion formed by combining carbon fiber materials;
And a steel wire portion disposed so as to twist around the composite core wire portion.   The vibration preventing device according to claim 1, wherein the composite core wire portion and / or the weight portion is provided with a notification means for notifying damage of the stranded wire portion.   The vibration preventing apparatus according to claim 1, wherein a filling material for filling strength at the time of damage is embedded in the composite core wire portion.   The vibration preventing apparatus according to claim 2, wherein the notifying unit is configured by providing a visual recognition part in which a paint is applied so as to be visible when the stranded wire part is damaged in the composite core wire part and / or the weight part. .   The vibration preventing device according to claim 3, wherein the filling material is an adhesive material enclosed in a microcapsule.

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