JP5043479B2 - How to recycle vibration isolator - Google Patents

Description

  The present invention relates to a vibration damping device such as a damper for preventing a slight wind vibration that is used by being attached to a span end of an overhead power transmission line or the like, and a twist prevention damper that is dispersed and installed within a span to prevent a wire from snowing. In particular, the present invention relates to a technology for recycling an anti-vibration device including weights galvanized among components.

  As the damper for preventing slight wind vibration, for example, a damper having a structure as shown in Patent Document 1 is widely used. Moreover, as a twist prevention damper, the thing of a structure as shown, for example in patent document 2 is used widely.

  In addition to the above-mentioned dampers, which are subject to wear and deterioration due to slight wind vibrations and galloping vibrations, all of them are used outdoors for many years, so depending on the environmental conditions of use, they are galvanized. Some heavy weights and strands of steel are also found to be significantly corroded. In addition, the service life has been 20 to 30 years or more, and it is necessary to systematically replace it with a new one due to safety maintenance problems.

Patent documents related to the technology of the present invention include, for example, the following.
JP 2001-309534 A Japanese Utility Model Publication No. 63-41800 JP-A-57-85936 JP 63-96224 A JP-A-2-298225 JP-A-7-90394

  The above-mentioned dampers have been adopted by electric power companies throughout the country, and their quantity is enormous, so it was necessary to recycle parts that could be recycled and used from the viewpoint of effective use of resources. However, even though they are dumped locally or collected as scrap, there are no examples of recycling, and all of them are redissolved and processed as scrap iron, consuming a lot of energy and deteriorating the global environment. It was. Considering the current trend of preventing global warming, it is necessary to actively promote recycling of components that can be recycled, to help prevent environmental pollution, and to contribute to energy conservation to prevent global warming. .

The following materials were used as typical constituent materials of these dampers.
(1) Weight: Galvanized iron casting (FC material)
(2) Electric wire clamp: Aluminum casting (AC4C, AC7A, etc.)
(3) Steel stranded wire: Galvanized steel stranded wire (hard steel wire)
(4) Bolts: General structural rolled steel (SS material)

Of the above components, the component (1) is a galvanized iron casting, all of which are used as weights, have a large volume, and even if rust is generated on the surface, these can be removed and replated. It is a recyclable member without affecting performance.
Moreover, since the material of (2) is clear, if it is separated, collected, melted and cast, it can be recycled again as a component of these products.

  The object of the present invention is, among the components such as the above-described damper for preventing wind breezing vibration and the anti-twisting damper to be installed dispersed in the diameter of the wire in order to prevent the snow from falling on the wire. The purpose is to collect and re-plat the weights that have been plated, and to reuse them as recycled products, and to provide these products at low cost.

(1) A method of recycling used vibration isolator for overhead wires,
The vibration isolator comprises a weight, a steel stranded wire, a wire gripping part, and a fastening member,
As a recycling process
A first treatment step of separating the weight and the steel strand;
Subsequent to the first step, a second treatment step including a corrosion product removal treatment and / or a dezincing treatment of the weight,
And a third treatment step of re-plating the weight.

(2) In the vibration isolator recycling method according to (1), in this method, the first step of separating the fixing portion between the steel strand and the weight is to fix one end of the weight and to the outside of the weight. The metal body press-fitted and fixed in the hexagonal hole of the weight is extruded and separated by an appropriate hydraulic jig using an extrusion jig having a slightly smaller dimension than the hexagonal hole. This is a weight recycling method.
Further, as a method of separating the gripping portion 12 fixed to the steel strand 11, the one end of the steel strand 11 separated from the weight 18 in the first step is fixed and the gripping portion is pulled, and a tester or the like. Can be separated and collected by a method of pulling out, a method of crushing / breaking the gripping portion 12 fixed to the steel stranded wire 11 by a press or other device.

(3) In the vibration isolator recycling method of (1), this method comprises the steps of (1) weight degreasing, (2) corrosion product removal, and (3) dezincing. It includes three pretreatment steps and is processed through at least one pretreatment step of the pretreatment steps.
(4) In the vibration isolator recycling method of (3), when the dezincing treatment is performed, the present method is characterized in that the dezincing treatment is performed by galvanizing with a minimum necessary amount.

In the second treatment step, the weight 18 that has been galvanized is mostly rusted or soiled due to the surface appearance corroding due to the environmental conditions of use. In order to remove the product, the following pretreatment steps are performed.
That is, as a pretreatment before entering the plating process of the removal weight 18, following the degreasing treatment (alkali degreasing or organic solvent degreasing treatment) for removing adhesion of oil and the like to the weight 18, surface corrosion products and deterioration It goes through a removal (blasting or pickling) process such as galvanization, but the former degreasing treatment may be omitted depending on the state of contamination of the removed product. In addition, the following processing methods are known as a method of recycling the galvanized steel material.

(1) A method of evaporating zinc adhering to the surface of a galvanized steel by heating scrap (for example, Patent Document 3).
(2) A method in which shot blasting is performed after the scrap is rapidly heated to mechanically remove oxidized and altered zinc adhering to the surface of the galvanized steel material that cannot be removed by the heat treatment (for example, Patent Document 4).
(3) A method of removing zinc on the surface of a galvanized steel by heating the scrap and simultaneously contacting with an oxidizing gas (for example, Patent Document 5).
(4) Immerse the ferroscrap containing zinc in an ammoniacal aqueous solution, dissolve zinc while blowing an oxygen-containing gas into the aqueous solution, and recirculate the gas above the liquid surface of the aqueous solution into the aqueous solution. There is a blowing method (for example, Patent Document 6).

  Any of the above methods is a method of completely removing zinc from the plated steel plate. However, in the present invention, it is not necessary to completely remove zinc plated on the weight 18, and the weight 18 is re-plated with zinc. Therefore, if the zinc on the surface of the weight is removed to the extent that it does not interfere with re-plating, the zinc is completely removed. It does not have to be.

(5) In the vibration isolator recycling method of (1) to (4), when this method is assembled as a vibration isolator using the re-plated weight 18, either the weight 18 or the grip portion 12 is used. In addition, the weight recycling method is characterized by providing a display or a sign that can identify the product as a recycled product.
As an example of the sign, a dish-like depression is provided at an appropriate portion of the weight 18 with a drill or the like so that the depression can be clearly distinguished even after galvanization, or the aluminum alloy grip 12 is cast. At this time, an appropriate character / symbol indicating that the product is a recycled product may be engraved on the mold, or the appropriate character / symbol may be engraved and displayed when the recycled product is assembled.

As is clear from the above description, the method for recycling the overhead power transmission line damper weight of the present invention has the following effects.
That is, since the weight, which is the main component of dampers, is re-plated and recycled without removing the new casting,
1) Recycled products can be provided at low cost.
2) Contribute to waste reduction through effective use of resources.
3) Product development that helps prevent environmental pollution is possible.
4) Contribute to energy conservation to prevent global warming.

Hereinafter, embodiments of a damper according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a configuration diagram of a damper of [Patent Document 1] to which the present invention is applied. FIG. 2 is a perspective view showing a state in which a weight is attached to the steel stranded wire shown in FIG. 3 is a cross-sectional view of the main part showing a state in which the metal body 16 shown in FIG. 2 is crimped. FIG. 3 (a) shows a state before crimping, and FIG. 3 (b) shows a state after crimping. Each state is shown. 4 is a cross-sectional view showing a cross section taken along line AA shown in FIG. FIG. 5 is a perspective view showing a state where the damper shown in FIG. 1 is attached to the overhead electric wire 1.
FIG. 6 is a partially cut front view of the twist preventing damper 20 shown in [Patent Document 2].

As shown in FIG. 1, an embodiment of a damper according to [Patent Document 1] includes a grip portion 12 attached to an overhead electric wire 1, and a steel stranded wire supported by the grip portion 12 and extending in parallel with the overhead wire 1. 11 and a weight 18 that fits and is fixed to both ends of the steel stranded wire 11.
The embodiment of the damper according to the present invention includes a metal body 16 (cylindrical sleeve) that is inserted with both ends of the steel stranded wire 11 having cylindrical holes.

  Here, the gripping portion 12 includes a clamp 13 and a presser fitting 14 that are mounted so as to be sandwiched from both sides of the overhead wire 1, and is attached to the overhead wire 1 by fastening a bolt 15. The clamp 13 and the holding metal fitting 14 are each formed with holding grooves 13a and 14a for inserting and holding the overhead electric wire 1 therebetween. Moreover, the clamp 13 is supporting the steel strand 11 in the position provided with the predetermined space | interval from the clamping groove 13a.

  The clamp 13 is configured such that when the clamping groove 13a is attached to the overhead electric wire 1, the position where the steel strand 11 is supported is at a predetermined angle θ with respect to the vertical direction of the overhead electric wire 1 (vertical direction shown in FIG. 1). It is attached so that it supports in the position inclined to. The steel stranded wire 11 extends in the front-rear direction shown in FIG. 1 in parallel with the overhead electric wire 1 from a position inclined at a predetermined angle θ, and weights 18 are attached to both ends in FIG. Each of them is fixed by protruding horizontally in the horizontal direction shown.

  The weight 18 is formed in a substantially spherical shape, and a hexagonal hole 18a is formed at a predetermined position eccentric from the center of the spherical shape. The hexagonal hole 18a is formed so that both ends of the steel stranded wire 11 can be fitted. The weights 18 are attached to both ends of the steel stranded wire 11 in different directions (left and right directions shown in FIG. 1), and are fixed so as to apply a twisting moment to the steel stranded wire 11. The weight 18 has a metal body 16 interposed between the steel strand 11 when the both ends of the steel strand 11 are fitted and fixed to the hexagonal hole 18a. The metal body 16 is a compression sleeve made of a soft metal such as aluminum or mild steel, and is formed in a cylindrical shape with one end sealed.

  Here, a method of fixing the weight 18 to the steel stranded wire 11 with the metal body 16 interposed will be described in detail with reference to FIGS. First, as shown in FIG. 2, the metal body 16 is inserted into both ends of the steel stranded wire 11 and compressed on the steel stranded wire 11 by compressing the outside into a hexagonal shape. By compressing the metal body 16 into a hexagonal shape, as shown in FIG. 4, the metal body 16 is pressed between the strands of the steel stranded wire 11 and fixed in a crimped state. The metal body 16 is compressed into a hexagonal shape and fitted into the hexagonal hole 18a of the weight 18 shown in FIG. 2 to fix the weight 18 so as not to rotate at both ends of the steel stranded wire 11. . Thereby, even if an excessive repetitive stress is applied to the connecting portion between the steel stranded wire 11 and the weight 18, damage such as rattling and breakage can be prevented, and the joining structure is extremely excellent in durability.

  Further, after the metal body 16 crimped to the steel stranded wire 11 is fitted into the hexagonal hole 18a of the weight 18, the both ends of the metal body 16 are connected to the both ends of the hexagonal hole 18a of the weight 18 as shown in FIG. Arrange them together. Then, by crimping the metal body 16 into the hexagonal hole 18a of the weight 18, the metal body 16 is deformed at both ends of the hexagonal hole 18a as shown in FIG. 16 and the stranded wire 11 are prevented from coming off.

  As shown in FIG. 5, an embodiment of a damper having such a configuration as shown in FIG. 5 is perpendicular to the steel strand 11 by the weight of the weight 18 when attached to the overhead electric wire 1 ( A force in the direction of arrow B shown in FIG. 5 is applied, both ends are bent downward, and the weight 18 rotates in the direction of arrow C due to the eccentric structure of the weight 18 and is twisted into the steel strand 11. Add moment. Further, in the embodiment of the damper according to the present invention, the steel stranded wire 11 is supported at a position at a predetermined angle θ with respect to the vertical direction of the overhead electric wire 1. The torsional moment is applied to the overhead electric wire 1 by rotating in the direction of arrow D shown in FIG.

  Therefore, in the embodiment of the damper according to [Patent Document 1], the pair of weights 18 twists the electric wire 1 in the resonance mode, the weight 18 centers on the grip part 12, and the grip part 12 is centered. As a damper (vibration isolation device) having a structure in which the weight 18 has three resonance modes of twisting the steel stranded wire 11 and absorbs vibration energy in a frequency region near these resonance modes. Yes.

As described above, the structure of the damper and the vibration energy absorption principle of [Patent Document 1] have been described, but the shape of the damper removed for recycling is removed with the configuration shown in FIG. The processing steps for recycling the product of Patent Document 1] will be described.
The weight recovery of the recovered damper in the present invention is performed through the following three processing steps.

(1) Separation and dismantling process of steel stranded wire and weight The first dismantling process is a process of separating the steel stranded wire 11 press-fitted and fixed to the hexagonal hole 18a of the weight 18 from the weight 18. As the separation method, in FIG. 2, after the metal body 16 compression-fixed to the end of the steel stranded wire 18 is fitted into the hexagonal hole 18 a, both ends thereof are connected to the shaft of the steel stranded wire 18. Since it is fixed by caulking in the direction, the rear side of the weight 18 is fixed from the front side of the drawing of FIG. It can be separated by a method of extruding with a hydraulic jig or the like.
As another method, it may be a step of forcibly applying a tension to the weight 18 with an Amsler tensile tester or the like, and in this case, the metal body 16 remains in the hexagonal hole 18a on the weight 18 side. So it's not a good way.

  On the other hand, in order to recycle the gripping part 12, a method for separating the gripping part 12 from the steel stranded wire 11 is as follows. That is, a method of crushing / breaking the fixing portion of the gripping portion 12 with a press or the like, or cutting the steel stranded wire 11 in the vicinity of the gripping portion 12, and an Amsler tensile tester between the remaining weight 18 and the gripping portion 12. For example, a method of pulling the grip portion 12 from the steel stranded wire 11 and separating it by applying tension can be adopted.

(2) Weight pre-processing step The weight 18 separated from the steel strand 11 and formed as a single unit is mostly rusted in red due to corrosion of the surface appearance or damaged. Therefore, in order to remove these products, for example, based on the “hot dip galvanization work standard” as shown in JIS H9124, the weight 18 can be recycled through the replating process of the weight 18. Done. In addition, as a pretreatment before entering the plating process of the removal weight 18, when fat or the like is attached to the surface of the weight 18, the degreasing treatment is performed using an alkaline cleaning liquid or an organic solvent as the degreasing treatment. The anti-vibration device is attached to the overhead power transmission line, so even if it is directly exposed to rainwater etc., it is difficult to consider the case where oils and fats adhere, so this processing step can be omitted in most cases. .

On the other hand, the surface corrosion product and the deteriorated zinc coating are removed by blasting or pickling.
In particular, in the present invention, it is not necessary to completely remove zinc plated on the weight 18, and zinc is re-plated on the weight 18 to be reused. It is sufficient if it is removed to such an extent that it does not become.
In the step (1) of the present invention, the step of separating and breaking the steel stranded wire and the weight and the step of separating the grip portion 12 from the steel stranded wire 11 may be performed before and after the both.

The embodiment shown in [Patent Document 1] of the present invention has been described above. However, the split weight of the anti-twisting damper 20 shown in FIG. 6 as shown in [Patent Document 2,] (28, 28 ′) Recycling can be done as follows.
That is, each of the weights (28, 28 ') has a symmetrical shape that is divided in half, and faces the hemispherical weight attachment bodies (26, 26') formed at both ends of the arm 14 so as to face each other. The weights (28, 28 ') are clamped on the hemispherical outer circumference of the hemispherical weight mounting body (26, 26'). It is attached so as to be capable of frictional rotation with the spherical surface portion 29 inside the weight.

  The hemispherical weight mounting body 26 formed on one side of the arm 21 is formed integrally with the arm 14, and the other side is formed with a small diameter portion 25 at the distal end portion of the arm. An arm fixing part 27 formed below is provided, and after inserting into the arm fixing part 27 from the small diameter part 25 side, a hemispherical weight mounting body 26 ′ is attached to the tip of the arm, and the hemispherical weight mounting body 26 is attached. The tip portion of the arm small-diameter portion 25 protruding from 'is caulked and integrated. The arm adhering portion 27 is integrated with the arm 21 by being compressed from the outside with a die or the like.

  Since the torsion preventing damper 20 has the above-described structure, in order to separate the split weight (28, 28 ') from the hemispherical weight mounting body (26, 26'), a weight caulking bolt ( 22 and 22 ') can be easily separated by loosening. The re-plating process for recycling these weights (28, 28 ') is the same as the process of the weight 18 of the vibration isolator, and the weight (28, 28') or the wire clamp 23 is appropriately used. As described above, a character or symbol indicating that it is a recycled product is engraved in the place, and a display or sign that can be easily identified is provided.

In the above description, only the case where the re-plating is zinc plating has been described, but zinc aluminum alloy plating excellent in corrosion resistance can also be applied. For example, plating methods such as Japanese Patent Publication No. 63-63626 and Japanese Patent Publication No. 04-19299 can be used.
Although not particularly mentioned, it goes without saying that the separated aluminum material of the gripping part is melted and cast and recycled.

It is a block diagram of the damper of [patent document 1] to which the present invention is applied. It is a perspective view which shows the state which attaches a weight to the steel strand shown in FIG. FIG. 3 is a cross-sectional view showing a state in which the metal body 16 shown in FIG. 2 is caulked, FIG. 3 (a) is a state before caulking, and FIG. 3 (b) is a cross-sectional view showing a state after caulking. . It is sectional drawing which shows the cross section of the AA line shown in FIG. FIG. 2 is a perspective view showing a state in which the damper shown in FIG. 1 is attached to the overhead electric wire 1. It is a partial cutaway front view of a twist prevention damper shown in [patent document 2] to which the present invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, Overhead electric wire 11 Steel twisted wire 12 Grip part 13 Clamp 13a, 14a Holding groove 14 Holding metal 15 Bolt 16 Metal body 18, 18 'Weight 18a Hexagonal hole 20 Twist prevention damper 21 Arm 22, 22' Weight caulking bolt 23 Electric wire clamp 24 Spring 25 Arm small diameter part 26, 26 'Hemispherical weight attachment body 27 Electric wire clamp fixing part 28 Split weight 29 Spherical part 30 Mounting bolt θ angle

Claims (3)

This is a method for recycling used vibration isolator for overhead electric wires, and it is installed in the span to prevent the slight wind vibration that is used by attaching to the span end of overhead power transmission lines, etc. A vibration isolation device such as a torsion prevention damper that is mounted in a distributed manner, having a weight that has been galvanized, and a recycling method,
The vibration isolator comprises a weight, a steel stranded wire, a wire gripping part, and a fastening member,
As a recycling process
A first treatment step of separating the weight and the steel strand;
Following the first step, a second processing step including the corrosion products removal process and dezincification process of the weight,
A third treatment step of re-plating the weight ,
In the first step, one end of the weight is fixed, and from the outer side of the weight, the steel stranded wire and the metal body that are press-fitted and fixed to the hexagonal hole of the weight from the hexagonal hole. Extruded with a slightly smaller size extrusion jig, separated,
In the second treatment step, only the deteriorated zinc film of the separated weight is removed by the dezincing treatment following the corrosion product removal treatment, and the adhered zinc is left,
In the third treatment step, the separated weight having the remaining adhered zinc is re-plated, and the vibration isolator recycling method is characterized in that: In the recycling method of the vibration isolator according to claim 1 ,
In the second treatment step, when a dezincing treatment is performed, the anti-vibration device is characterized in that the dezincing treatment is limited to a necessary minimum and galvanization is performed in the next third treatment step. Recycling method. In the recycling method of the vibration isolator according to claim 1 or 2 ,
Assembling as a new vibration isolator using the replated weight,
And a step of providing a display or a sign that can identify that the product is a recycled product on the assembled anti-vibration device.

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