Peeling device and electric wire continuous recovery system and electric wire continuous recovery method using peeling device
Patent Information
- Application Number
- JP2022188966
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2022-11-28
- Publication Date
- 2025-09-22
AI Technical Summary
The process of collecting and storing overhead power transmission wires is labor-intensive and hazardous due to their weight, and existing methods either require frequent reel changes or result in inefficient workloads.
A system that separates the steel core from the aluminum wire during collection, using a winding and stretching device, a wire stripping device, and a reel winder, with tension detection and control mechanisms to manage the stripping process efficiently.
The system reduces the workload and enhances safety by allowing continuous wire collection with reduced frequency of reel changes and improved work efficiency.
Smart Images
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Abstract
Description
[Technical field]
[0001] The present invention relates to a wire stripping device, and a continuous electric wire recovery system and a continuous electric wire recovery method using the same. [Background technology]
[0002] Overhead transmission is usually used for the long-distance transmission of electricity, which is indispensable in our lives. Overhead transmission is achieved by a large number of steel towers installed at distances of several hundred meters, and components such as electric wires that are insulated by insulators and strung between the many steel towers.
[0003] The electric wires used for this overhead power transmission are exposed to wind and rain at altitudes of over 100 meters, and therefore require regular replacement to maintain stable power transmission.
[0004] The replacement of the electric wire requires the work of winding and recovering the old electric wire (electric wire recovery work). There are various methods for this electric wire recovery work, for example, (1) in each tower in the section where the electric wire is to be removed, the electric wire is removed from the "insulator", and in a tension tower, the electric wire between the front and rear spans is connected with a wire and the wire is placed on a pulley called a metal wheel, and in a suspension tower, the electric wire is placed on the metal wheel, (2) in each of the front (sending side) and rear (winding side) terminal towers, a wire extended from the ground is connected to the end of the electric wire and the wire or electric wire is placed on the metal wheel, and (3) a wire stretching car is installed on the sending side and a winding wire stretching car is installed on the winding side, and while the wire is sent out while tension is applied to the wire by the wire stretching car, the wire and electric wire are wound up by the winding wire stretching car, and are recovered by winding up by a drum or reel winder further rearward of the winding wire stretching car. A technique related to this electric wire recovery work is described, for example, in the following Patent Document 1. [Prior art documents] [Patent documents]
[0005] [Patent Document 1] JP 2008-195518 A Summary of the Invention [Problem to be solved by the invention]
[0006] Incidentally, the electric wires collected in the above electric wire collection operation are very heavy. Although it depends on the length of the electric wire being wound, when 1 to 2 km of electric wire is wound on a drum, the weight is about 3 to 6 tons. Since this weight is too heavy to handle in a warehouse where storage work is performed, it is necessary to divide the electric wire into smaller pieces of about 2 tons or less.
[0007] However, this dividing process requires the wires to be unwound, which is a very heavy workload. Even if the wires are divided into smaller quantities of 2 tons or less, they still need to be removed from the drums, which is a dangerous task and it is therefore preferable to limit the number of times this is done as much as possible.
[0008] On the other hand, instead of using a drum, it is also possible to use a reel winder to wind the wire onto a wire reel. However, this method has issues such as the fact that the amount that can be wound onto a single wire reel is short, at around 100 to 200 meters, and the need to frequently change reels, making the work less efficient.
[0009] In view of the above problems, an object of the present invention is to provide a wire stripping device which is safer and requires less work, and a continuous wire recovery system and a continuous wire recovery method using the same. [Means for solving the problem]
[0010] The inventors have conducted intensive research into the above-mentioned problems and have discovered that the workload can be significantly reduced by winding and recovering the electric wire while separating (stripping) the steel core and the aluminum wire. This has led to the completion of the present invention.
[0011] In other words, an electric wire continuous recovery system according to one aspect of the present invention includes a winding and extending device that winds up an electric wire consisting of a steel core and an aluminum wire arranged around the steel core, a wire stripping device that strips the aluminum wire from the steel core in the electric wire, and a reel winder that winds up the steel core.
[0012] In addition, in this respect, although not limited thereto, it is preferable that the wire stripping device includes a control device that controls the wire stripping speed of the wire stripping device based on the winding speed of the wire winding and drawing device while pulling in the electric wire.
[0013] In addition, in this respect, although not limited thereto, it is preferable that the winding and extending device is provided with a tension detection device that detects the tension of the wound electric wire.
[0014] In addition, in this respect, although not limited thereto, it is preferable that the wire stripping device is equipped with a control device that controls the wire stripping speed of the wire stripping device based on the winding speed of the wire winding / drawing device and the tension detected by the tension detection device.
[0015] Furthermore, a method for continuously recovering an electric wire according to another aspect of the present invention includes a step of winding up an electric wire consisting of a steel core and an aluminum wire arranged around the steel core, a step of stripping the aluminum wire from the steel core in the electric wire while pulling in the electric wire, and a step of winding up the steel core.
[0016] In addition, in this respect, although not limited thereto, it is preferable that the step of stripping the aluminum wire from the steel core of the electric wire while pulling in the electric wire is performed by controlling the stripping speed based on the winding speed of the winding and drawing device.
[0017] In addition, in this aspect, although not limited thereto, it is preferable that the step of stripping the aluminum wire from the steel core of the electric wire includes detecting tension in the electric wire and controlling the stripping speed based on the tension.
[0018] A wire stripping device according to another aspect of the present invention includes a pair of pinch rollers for pinching and feeding an electric wire, The wire stripping device is provided with a rotary blade that cuts an electric wire being clamped by a pair of clamping rollers, the rotary blade being positioned at a position offset from the center position of the pair of clamping rollers.
[0019] In addition, in this respect, although not limited thereto, it is preferable that the electric wire be made of a steel core and aluminum wires arranged around the steel core.
[0020] In addition, in this respect, although not limited thereto, it is preferable to provide a secondary stripping mechanism for stripping the aluminum wire from the steel core behind the winding and drawing car (on the reel winder side).
[0021] In addition, in this respect, although not limited thereto, it is preferable to provide an aluminum wire recovery mechanism behind the secondary stripping mechanism (on the reel winder side) for recovering the aluminum wire stripped from the steel core.
[0022] Further, in this respect, although not limited thereto, it is preferable that the rotary blade is located within a range of 0.3 or less from the center when the separation distance between the pair of pinch rollers is taken as 1. Effect of the Invention
[0023] As described above, the present invention can provide a wire stripping device which is safer and requires less work, and a continuous electric wire recovery system and a continuous electric wire recovery method using the same. [Brief description of the drawings]
[0024] [Figure 1] 1 is a diagram showing an outline of an electric wire continuous recovery system according to an embodiment; [Diagram 2] 1 is a diagram showing an outline of a wire winding and drawing device used in an electric wire continuous recovery system according to an embodiment. [Diagram 3] 1 is a diagram showing an outline of an electric wire collected in an electric wire continuous collecting system according to an embodiment; [Figure 4] 1 is a diagram showing an outline of a wire stripping device of an electric wire continuous recovery system according to an embodiment; [Diagram 5] 4 is a diagram showing an image of a cut made by the wire stripping device according to the embodiment into the electric wire; FIG. [Figure 6] 3 is a diagram showing an outline of a secondary wire stripping mechanism of the wire stripping device according to the embodiment; FIG. [Figure 7] 1 is a diagram showing an outline of a tension detection device of an electric wire continuous recovery system according to an embodiment; [Figure 8] 4 is a diagram for explaining tension of the electric wire that may occur between the wire winding / drawing device and the wire stripping device. FIG. [Figure 9] 1 is a diagram showing an outline of a reel winder of an electric wire continuous recovery system according to an embodiment; [Figure 10] 1 is a diagram showing a process flow of a method for continuously recovering an electric wire according to an embodiment; [Figure 11] FIG. 2 is a photograph showing a full view (whole) of the electric wire continuous recovery system according to the embodiment. [Figure 12] FIG. 2 is a photograph showing the appearance of a tension detection device of the electric wire continuous recovery system according to the embodiment. [Figure 13] FIG. 2 is a photograph showing the appearance of a control device of the electric wire continuous recovery system according to the embodiment. [Figure 14] FIG. 2 is a photograph showing the appearance of a secondary wire stripping mechanism of the electric wire continuous recovery system according to the embodiment. [Figure 15] 1 is a cross-sectional photograph of an electric wire processed by an electric wire continuous recovery system according to an embodiment of the present invention. [Figure 16] FIG. 4 is a photograph of a steel core recovered by the electric wire continuous recovery system according to the embodiment. [Figure 17] FIG. 2 is a photograph of an aluminum wire recovered by the electric wire continuous recovery system according to the embodiment. BEST MODE FOR CARRYING OUT THEINVENTION
[0025] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention can be embodied in many different forms, and is not limited to the specific examples described in the following embodiments and examples.
[0026] 1 is a schematic diagram of an electric wire continuous recovery system (hereinafter referred to as "this system") S according to this embodiment. As shown in the figure, this system S includes a winding and extending device 1 that winds up an electric wire W, a wire stripping device 2 that applies tension to the electric wire W coming out of the winding and extending device 1 to strip the aluminum wire A from the steel core C in the electric wire W, and a reel winder 3 that winds up the steel core C.
[0027] The effects of this system S will be clear from the description below, but since the wire can be stripped while being wound, the lightweight wire can be separated and recovered, making it a safer continuous wire recovery system with less labor.
[0028] First, as described above, the present system S includes a winding and extending device 1 that winds up an electric wire. Figure 2 shows an outline of the winding and extending device 1 used in the present system S. In the present system S, by using the winding and extending device 1, it becomes possible to wind up the electric wire W hung on a steel tower. In addition, by using a stripping device 2 behind it (on the reel winder 3 side), it becomes possible to send the electric wire W coming out of the winding and extending device 1 to the reel winder 3, where the electric wire W is stripped onto a steel core (an iron core from which aluminum wires have been stripped) and then wound up.
[0029] As shown in the figure, the wire winding and extending device 1 includes a drum 11 for winding up the electric wire W, a support structure member 12 for rotatably supporting the drum 11, and a power member 13 for rotating the drum 11. That is, the drum 11 is rotatably supported by the support structure member 12, a part of the electric wire W is wound around the drum 11 so as not to slip, and the electric wire W can be wound while rotating the drum 11 by the power member 13.
[0030] Furthermore, by using the wire winding and stretching device 1, the wire W can be pulled with an appropriate tension and wound up from the tower while being reduced to an appropriate force for the device behind (on the reel winder 3 side), specifically the wire stripping device 2. In other words, it is possible to make the tension applied to the wire W between the tower and the wire winding and stretching device 1 different from the tension applied to the wire W between the wire winding and stretching device 1 and the wire stripping device 2. In particular, in this system S, by using a tension detection device 4 and a control device described below, it becomes possible to adjust the tension of the wire passing through the tension detection device 4 with higher accuracy. The wire winding and stretching device is also called a wire winding and stretching car because it is equipped with a rotating drum.
[0031] Incidentally, the electric wire W recovered by the present system S is not limited as long as it can be stripped to reduce its weight, but it is preferable that the electric wire W is made of a steel core C and an aluminum wire A arranged around the steel core C. Fig. 3 shows an outline of the electric wire W recovered by the present system S. In the figure, (a) shows a cross section of the electric wire W, and (b) shows a perspective outline of the structure of the electric wire W.
[0032] As described above, the structure of the electric wire W to be recovered may be one in which the aluminum wire A is arranged around the steel core C, but as shown in the figure, it is preferable that the steel core C is formed by bundling a plurality of thin steel wires, and more preferably, the plurality of thin aluminum wires A are each twisted around the steel core C and wrapped in a so-called spiral shape. This makes it possible to ensure the strength of the electric wire W. As will be clear from the description below, in this system S, the aluminum wire A is efficiently stripped (peel) from around the steel core C, making it possible to separate and recover the steel core C and the aluminum wire A separately, and it is possible to significantly reduce the workload, such as reducing the frequency of reel replacement in a reel winder. More detailed information will be described below.
[0033] As described above, the system S includes the wire stripping device 2 that applies tension to the electric wire W coming out of the wire winding and stretching device 1 and strips the aluminum wire A from the steel core C. By stripping (peeling) the aluminum wire A from the steel core C, it becomes possible to efficiently recover only the steel core. That is, it becomes possible to adjust the length per unit time of the electric wire W coming out of the wire winding and stretching device 1 and the length per unit time of the electric wire W entering the wire stripping device 2 to appropriate values, and to adjust the tension between the wire winding and stretching device 1 and the wire stripping device 2 to an appropriate value. Specifically, this can be achieved by adjusting the length per unit time of the electric wire W entering the wire stripping device 2 (the amount of electric wire W processed by the wire stripping device 2 per unit time) relative to the length per unit time of the electric wire coming out of the wire winding and stretching device 1.
[0034] 4 shows an outline of the wire stripping device 2 of the present system S. In this figure, (a) is a diagram showing the appearance of the wire stripping device 2, and (b) is an enlarged view of the periphery of the pinch roller 21 and the rotary blade 22. The structure of the wire stripping device 2 of the present system S is not limited as long as it can strip the aluminum wire A from the steel core C as described above, but it is preferable that the wire stripping device 2 includes a pair of pinch rollers 21 that pinch the electric wire, a rotary blade 22 that makes an incision in the electric wire W pinched by the pinch rollers 21, a power member 23 that rotates and drives the pinch rollers 21 and the rotary blade 22, and a support structure member 24 that supports the pinch rollers 21, the rotary blade 22, and the power member 23.
[0035] In the wire stripping device 2 of the system S, the pair of pinching rollers 21 is a device for firmly pinching and fixing the electric wire W and sending it out backward (to the reel winder 3 side). By pinching and fixing the electric wire W, it is possible to ensure that the rotary blade 22 can incise the electric wire W. In addition, the pair of pinching rollers 21 is not limited as long as a space for making an incision with the rotary blade in the electric wire W can be secured, and for example, as shown in this figure, the pair of pinching rollers 21 may pinch the electric wire W from the horizontal direction, but may also pinch the electric wire W from the vertical direction. When the pair of pinching rollers 21 is pinched from the vertical direction, the rotary blade makes an incision from the horizontal direction. Furthermore, it is also possible to divide the pair of pinching rollers 21 and install the rotary blade 22 between them, so that the pinching direction and the incision method are the same.
[0036] In the wire stripping device 2 of the system S, the rotary blade 22 is for making a cut in the electric wire W, more specifically, the aluminum wire A, as described above. By making a cut, the aluminum wire A can be cut and separated from the steel core C. The cut direction may be substantially perpendicular to the extension direction of the electric wire W, or may be substantially parallel to the extension direction of the electric wire W, or may be tilted from these directions. In general, as described above, the electric wire W has a plurality of aluminum wires A twisted and spirally wrapped around the steel core C. In such a case, even if the cuts are made in a direction substantially parallel to the extension direction of the electric wire W, it is possible to make a sufficient cut and cut each aluminum wire A, so that it is possible to stably cut and strip the aluminum wires A from the steel core C. An image of this case is shown in FIG. 5.
[0037] Incidentally, the wire stripping device 2 of the present system S is preferably provided with a control device 25 that controls the wire stripping speed of the wire stripping device 2 based on the winding speed of the wire winding and stretching device 1. In the present system S, not only the wire winding and stretching device winds up the electric wire W from the steel tower, but also the wire stripping process is performed by the wire stripping device 2. That is, each has an appropriate processing speed, and they do not necessarily match. Therefore, a mechanism for adjusting the processing speed is required. In the present system S, since the speed of the wire winding and stretching device 1 depends on the situation of the electric wire removal work, it is important to make the speed of the wire stripping device 2 behind (the reel winder 3 side) follow it, and since it is easier to adjust the speed of the wire stripping device 2 than to adjust the winding speed of the wire winding and stretching device 1, there is an advantage that a more stable processing speed can be realized by controlling the wire stripping speed of the wire stripping device based on the winding speed of the wire winding and stretching device 1.
[0038] In this embodiment, the rotary blade 22 may be located at the center of the pair of pinch rollers, but it is also preferable to dispose it at a position offset from the center. By adopting such a configuration, it becomes possible to reduce the state in which the aluminum wire A gets caught in the steel core C, making it difficult to separate the wire from the steel core C.
[0039] Although there may be other effects due to the principle that enables the above-mentioned effect to be exerted, it can be assumed that the effect is as follows. That is, first, the steel core C is present at the center position, and when the electric wire W is clamped by the pair of pinching rollers 21, a compressive force is naturally applied to the electric wire W. Then, if the rotary blade 22 is at the center position, the aluminum wire A is cut by the rotary blade 22, but at the same time, it is pressed against the steel core C, and the steel core C and the aluminum wire A are tightly interlocked. Then, when the electric wire W is released from the grip of the pinching rollers 21, the steel core C also momentarily releases its compression and expands, and returns to its original convergent state, but at that time, the steel core C bites the aluminum wire A. That is, if the rotary blade is present at the center position, or more specifically, at a position overlapping the steel core C, there is a possibility that the aluminum wire A will be bitten. Therefore, by shifting the position of the cut from the center position, it is possible to reduce such a possibility, and there is an advantage that the work efficiency can be improved.
[0040] From another viewpoint of the range in which the above-mentioned effect can be obtained, the rotary blade 22 may be located in the center when the distance between the pair of pinch rollers is 1 (when the opposing surfaces between the rollers are curved, the maximum opposing distance), but it is also preferable to shift the rotary blade 22 as described above. The amount of this shift is not limited, but is preferably 0.3 or less, and more preferably 0.1 to 0.3. The reason for this is that, when the diameter of the electric wire W is 1, the diameter of the steel core C in the electric wire W is generally within the range of 0.2 to 0.5. Therefore, by setting the amount of shift from the center to half this, specifically within the range of 0.1 to 0.3, it becomes possible to position the rotary blade 22 near the boundary between the steel core C and the surrounding aluminum wire A, and to shift the position of the rotary blade 22 from the steel core C, and it becomes possible to reduce the amount of the aluminum wire A that is bitten by the steel core C as described above. On the other hand, if the deviation is too large, only the aluminum wire A can be cut, but there is a possibility that the aluminum wire A will remain outside the reach of the rotary blade 22, and therefore this risk can be reduced by setting the deviation in the range of 0.3 or less. Note that the reason why the distance between the pair of clamping rollers is used as the standard here is that the electric wire W is processed by the wire stripping device 2, and the distance between the pair of clamping rollers is determined according to the electric wire W to be processed, making it easier to specify the deviation more objectively.
[0041] In addition, in the wire stripping device 2 of the present system S, although not limited thereto, it is preferable to provide a secondary wire stripping mechanism 26 at the rear (reel winder 3 side) for stripping the aluminum wire A from the steel core C. As described above, by using the wire stripping device 2, the aluminum wire A is notched, and when the electric wire W is released from the pair of pinching rollers 21 by the notch, the aluminum wire A naturally peels off and falls. However, if the aluminum wire A is caught in the steel core C as described above, it may not peel off naturally. In such a case, if it is wound up in the reel winder 3 at the rear, excess material will get mixed in with the steel core C, and the winding by the reel winder 3 will not be uniform, and other inconveniences will occur. Therefore, in such a case, it is reliable to remove it manually by the worker, but the end surface of the cut aluminum wire is sharp, and there is a possibility that the worker will be cut by touching this end surface. Therefore, by providing the secondary wire stripping mechanism 26, the burden on the worker can be reduced as much as possible.
[0042] FIG. 6 shows an example of the secondary wire stripping mechanism 26 according to this embodiment. As shown in this figure, the secondary wire stripping mechanism 26 preferably includes at least a stripping member 261 that presses or clamps the electric wire W and strips off the aluminum wire A that remains attached around the steel core C of the electric wire W. This can significantly reduce the burden on the worker. Specifically, the secondary wire stripping mechanism 26 includes a plurality of pressing members 2611 that are pressed against the electric wire W, and more preferably, the pressing members 2611 are arranged at different positions with respect to the extension direction of the steel core C, and each pressing the steel core C from either the top, bottom, left, or right direction. In this way, the steel core C can be clamped and contacted from all four sides, and the pressing members 2611 can be brought into contact with the aluminum wire A that remains attached around the steel core C and stripped off.
[0043] Furthermore, in the present system S, although not limited thereto, it is preferable to provide an aluminum wire recovery mechanism 27 in the secondary stripping mechanism 26, which is the downstream portion of the wire stripping device 2, for recovering the aluminum wire A stripped from the steel core C. When the aluminum wire A is separated from the steel core C, it falls due to gravity. If this is left unattended, the broken aluminum wire A will accumulate under the secondary stripping mechanism 26, causing problems in the operation. For this reason, it is preferable to provide a mechanism for recovering the aluminum wire A so as not to impede the operation of the wire stripping device 2.
[0044] The structure 27 of the aluminum wire recovery mechanism is not limited as long as it has the above-mentioned functions, but preferably has a conveying member 271 arranged below the secondary stripping mechanism 26 and a storage container 272 that stores the aluminum wire A conveyed by the conveying member 271. The structure of the conveying member 271 is also not particularly limited, but is preferably a so-called belt conveyor. In the case of a belt conveyor, it is preferable that it has a plurality of rotatable shaft members 2711, a support member 2712 that rotatably supports the plurality of shaft members 2711, a belt 2713 that is wound around the plurality of shaft members 2711, and a power member 2714 for moving the belt 2713. In this way, the aluminum wire A that has fallen from the steel core C is dropped onto the belt 2713, and is carried to the storage container 272 by the belt 2713 by the power member 2714, so that the aluminum wire A can be stored in a state where the burden on the worker is reduced. The storage container 27 may be a bag or a box.
[0045] Furthermore, in the present system S, although not limited thereto, it is preferable to provide a tension detection device 4 that detects the tension of the electric wire W wound by the wire winding and drawing device 1. By providing the tension detection device 4, not only can the control of the control device 25 be performed more accurately, but also the tension detection device 4 functions as an input guide for inputting the electric wire W in the stage preceding the wire stripping device 2, thereby improving the safety of the present system S.
[0046] In addition, with the addition of the tension detection device 4, it is considered that ideally the winding and sending speeds of the electric wire W of the tension detection device 1 and the stripping speed of the wire stripping device 2 should be kept the same to always perform consistent processing, but in reality it is not easy to make the speeds completely the same, and even if the deviation is small, it may gradually accumulate and become a large deviation. Therefore, by monitoring and adjusting the tension of the electric wire W between the winding and extending device 1 and the wire stripping device 2, more accurate and safer stripping work can be performed.
[0047] FIG. 7 shows an outline of the tension detector 4 in the system S. The tension detector 4 in the system S is not limited as long as it can perform the above-mentioned functions, but is configured to include, for example, a weight member 41 that applies a load to the electric wire W, a support structure member 42 that supports the weight member 41, and a detection member 43 that detects the position of the weight member 41. More specifically, in the tension detector 4, the weight member 41 is attached to the electric wire W between the winding and stretching device 1 and the wire stripping device 2, and the position of the weight member 41 is detected by the detection member 43 to detect the tension. More specifically, tension is generated in the electric wire W by applying a certain amount of weight to the weight member 41, and if slack is generated in the electric wire W between them, the weight member 41 goes down, and if there is little slack, the weight member 41 goes up. That is, it is possible to detect the degree of tension by detecting the vertical movement position of the weight member 41. When the slack is large, it is preferable to increase the wire stripping speed of the wire stripping device 2, and when the slack is small, it means that the wire stripping speed of the wire stripping device 2 is relatively fast, and adjustment can be made by slowing down the speed. It is preferable that the weight member 41 has a weight 411 and a pulley 412 that suspends the weight 411 and slides smoothly on the electric wire W. In this way, it is possible to move the pulley 412 and the weight 411 up and down at positions fixed with respect to the ground surface even when the electric wire W is being fed. For this reason, it is preferable that the weight 411 is slidable up and down with respect to the support structure member 42. In addition, the detection member 43 is not limited as long as it can detect the position of the weight member 41. For example, a preferred example is a configuration that includes a pulley and a chain that is hooked on the pulley and suspended on both sides, with the weight 411 connected to one side of the chain and a balancing weight connected to the other side, and the amount of movement of the chain that moves in accordance with the up and down movement of the weight 411 is counted, thereby detecting the position of the weight member according to the counted position.
[0048] As is clear from the above description, the "tension" here is an index showing the tension and slackness of the electric wire W, and more specifically, it shows the tension or slackness of the electric wire W caused by the tension generated between the wire winding and stretching device 1 and the wire stripping device 2. An image of this case is shown in FIG. 8. When the tension of the wire winding and stretching device 1 and the wire stripping device 2 is low, it means that the electric wire W is slack, and if left as is, there is a risk that the electric wire W will touch the ground, or that there will be a problem with the winding of the wire stretching winding device, or that there will be a problem with the stripping process of the wire stripping device. Therefore, it is preferable to increase the stripping speed of the wire stripping device 2. On the other hand, when the tension of the wire winding and stretching device 1 and the wire stripping device 2 is high, a strong tension is acting between the electric wire W, and if left as is, there is a risk that a very dangerous state will occur in which the wire winding and stretching device 1 or the wire stripping device 2 is pulled by either one and moves, and therefore it is preferable to slow down the stripping speed of the wire stripping device 2. This adjustment enables a safer wire stripping process.
[0049] In addition, the system S includes the reel winder 3 for winding the steel core C, as described above. The reel winder is a device for winding the steel core C from which the aluminum wire A has peeled off, and is preferably configured to include, but is not limited to, a reel 31, a support structure member 32 for supporting the reel in a rotatable state, and a power member 33 for rotating the reel 31. The system S includes the reel winder 3, and by winding only the steel core C on the reel winder 3, it is possible to store the aluminum wire and the steel core in a separated state. The reel winder 3 also allows the collected electric wire to pass smoothly through the winding and extending device, which has the effect of making the electric wire collection work safe. FIG. 9 shows an outline of the reel winder 3 in the system S.
[0050] (method) Here, we will explain the method for continuously recovering electric wires using this system S. The method for continuously recovering electric wires according to this embodiment (hereinafter referred to as "this method") is a method realized by the above-mentioned system S, but is not limited to this, and includes the steps of (S1) winding an electric wire made of a steel core and aluminum wires arranged around the steel core, (S2) stripping the aluminum wires from the steel core while pulling the electric wire into the electric wire, and (S3) winding the steel core.
[0051] This method is used in the removal of power transmission lines and in the replacement of electric wires strung on multiple steel towers, and is useful for winding and recovering old electric wires (electric wire recovery work). Note that this method uses the term "continuous recovery" because it allows electric wires to be recovered continuously.
[0052] Furthermore, as explained in the Background Art section of this specification, the premise for sending this electric wire to the rear (reel winder 3 side) is, for example, (A) at each tower in the section from which the electric wire is to be removed, the electric wire is removed from the "insulator," and at a tension tower, the electric wire between the front and rear spans is connected with a wire and the wire is placed on a pulley called a metal wheel, and at a suspension tower, the electric wire is placed on the metal wheel, (B) at each of the front (sending side) and rear (reel winder 3 side) terminal towers, the wire extended from the ground is connected to the end of the electric wire and the wire or electric wire is placed on the metal wheel, and (C) a winding and extending device is installed at the sending side and rear (reel winder 3 side), and while the wire is sent out by the winding and extending device at the sending side, the wire and electric wire are wound up while applying tension to the wire by another winding and extending device at the rear (reel winder 3 side), and the wire and electric wire are stripped and wound up by a stripping device and a reel winder further rearward of the winding and extending device for recovery.
[0053] As described above, the method first includes the step (S1) of winding the steel core and the electric wire made of aluminum wires arranged around the steel core. This step is realized by the winding and extending device 1, although it is not limited thereto.
[0054] The method also includes a step (S2) of stripping the aluminum wire from the steel core while pulling the electric wire in. This stripping step is realized by the wire stripping device 2, although it is not limited thereto.
[0055] In addition, in this step, although not limited thereto, it is preferable to control the stripping speed based on the winding speed of the wire winding and stretching device. This adjustment can be realized, for example, by the control device 25. More specifically, when the winding speed of the wire winding and stretching device is faster than the stripping speed of the wire stripping device, the stripping speed of the wire stripping device is increased, and when the winding speed of the wire winding and stretching device is slower than the stripping speed of the wire stripping device, the stripping speed of the wire stripping device is decreased, and so on, so that the speeds are the same.
[0056] In addition, although not limited to this step, it is preferable that the step of stripping the aluminum wire from the steel core of the electric wire detects the tension of the electric wire and controls the stripping speed based on the tension. When only the winding speed of the winding and stretching device and the stripping speed of the stripping device are monitored, it is difficult to determine the amount of tension accumulated due to the speed difference that occurred before. Therefore, by measuring the tension of the electric wire W between the winding and stretching device and the stripping device, the inconsistency that occurs between them can be sufficiently eliminated.
[0057] Finally, this method includes a step (S3) of winding up the steel core. This step can be realized by the above-mentioned reel winder 3. Fig. 10 shows the process flow of this electric wire continuous recovery method.
[0058] As described above, the present embodiment can provide a wire stripping device with a smaller workload, and a continuous wire recovery system and method using the same. More specifically, the continuous wire recovery system can continuously perform wire removal, wire stripping, and steel core recovery by continuously arranging the wire winding and extending device, wire stripping device, and reel winder for one electric wire. In addition, the aluminum wire can be stripped from the steel core without cutting the electric wire W, and the aluminum wire can be cut short, making it easy to recover the aluminum wire. In addition, the present system has an advantage that the tension detection device 4 is separately provided, and the speeds of the wire winding and extending device and the wire stripping device can be synchronized while offsetting errors that inevitably accumulate in the process. In other words, the above combination can provide a continuous wire recovery method with a very small workload for the operator and high safety. EXAMPLES
[0059] Here, the above-mentioned continuous electric wire recovery system was actually created and its effectiveness was confirmed. The details are shown below.
[0060] First, in this system, a winding and extending device was installed, followed by a wire stripping device and a reel winder that winds up the steel core. In addition, a tension detection device was installed between the winding and extending device and the wire stripping device, and a control device was installed that controls the throughput of the wire stripping device based on the tension detected by the tension detection device. Furthermore, in this system, a secondary stripping mechanism was installed to promote the stripping of the aluminum wire from the steel core. An overall view of this is shown in Fig. 11, and the appearance of the tension detection device is shown in Fig. 12, the appearance of the control device in Fig. 13, and the appearance of the secondary stripping mechanism in Fig. 14.
[0061] 1,650 m of electric wire (TACSR / AC610SQ: 35-year-old old wire) with an outer diameter of 34.2 mm and an aluminum wire wound around a steel core with a diameter of 11.4 mm was fed into this assembled system and processing was performed.
[0062] As a result, due to the effective driving of the tension detection device and control device, excessive tension was not generated between the winding and stretching device and the wire stripping device, and seven reels' worth of raw material were able to be separated and recovered into one reel's worth of steel wire and 28 FIBC bags' worth of aluminum wire (fullness rate 50-60%). The cross section of the electric wire before processing is shown in Fig. 15, the separated and recovered steel core in Fig. 16, and the separated and recovered aluminum wire in Fig. 17. It should be noted that the same effect could be obtained when using this system with electric wires of other sizes (electric wires with an outer diameter of 38.4 mm in which aluminum wire is wound around a steel core with a diameter of 9.6 mm).
[0063] As described above, the effectiveness of the present system was confirmed by this embodiment. In the case where the present system was implemented only with the configuration of the wire winding and stretching device, the wire stripping device, and the reel winder without providing the tension detection device and the control device, the tension and deflection of the wire could be detected manually as appropriate and the processing amount of the wire stripping device could be adjusted to perform the same processing as described above. However, if the processing amount was left constant without adjustment, even if a temporarily balanced state could be obtained, as time passed, inconveniences such as the wire stripping device being pulled, or the wire W sent out from the wire winding and stretching device being excessively deflected and touching the ground occurred, and the operation of the system had to be temporarily stopped. In other words, it was confirmed that the configuration of the wire winding and stretching device, the wire stripping device, and the reel winder could provide a certain effect, but the effect of providing the tension detection device and the control device was remarkable. [Industrial Applicability]
[0064] INDUSTRIAL APPLICABILITY The present invention has industrial applicability as a wire stripping device, and as a continuous electric wire recovery system and a continuous electric wire recovery method using the same.
Claims
1. a winding and drawing device that winds up an electric wire made of a steel core and aluminum wires arranged around the steel core; a wire stripping device that strips the aluminum wire from the steel core of the electric wire; and a reel winder that winds up the steel core.
2. The electric wire continuous recovery system according to claim 1 , wherein the wire stripping device includes a control device that controls the wire stripping speed of the wire stripping device based on the winding speed of the wire winding / extending device.
3. The electric wire continuous recovery system according to claim 1, further comprising a tension detection device for detecting tension of the electric wire wound by the wire winding and drawing device.
4. 4. The electric wire continuous recovery system according to claim 3, wherein the wire stripping device includes a control device that controls the wire stripping speed of the wire stripping device based on the winding speed of the wire winding / extending device and the tension detected by the tension detection device.
5. a step of winding a steel core and an electric wire made of aluminum wires arranged around the steel core; a step of stripping the aluminum wire from the steel core while pulling the electric wire into the electric wire; A method for continuously recovering an electric wire, comprising the step of winding the steel core.
6. The step of stripping the aluminum wire from the steel core of the electric wire includes:
6. The method for continuously recovering an electric wire according to claim 5, wherein the wire stripping speed is controlled based on the winding speed of the wire winding and drawing device.
7. The step of stripping the aluminum wire from the steel core of the electric wire includes:
7. The method for continuously recovering an electric wire according to claim 6, wherein the tension of the electric wire is detected, and the stripping speed is controlled based on the detected tension.
8. a pair of clamping rollers for clamping and feeding the electric wire; a rotary blade that makes a cut in the electric wire nipped by the nipping rollers, The rotary blade is disposed at a position offset from the center of the pair of pinch rollers.
9. 9. The wire stripping device according to claim 8, which is used for an electric wire made of a steel core and an aluminum wire arranged around the steel core.
10. 10. The wire stripping device according to claim 9, further comprising a secondary wire stripping mechanism at the rear thereof for stripping the aluminum wire from the steel core.
11. 10. The wire stripping device according to claim 9, further comprising an aluminum wire recovery mechanism at the rear thereof for recovering the aluminum wires stripped from the steel core.
12. 9. The wire stripping device according to claim 8, wherein the rotary blade is located within a range of 0.3 or less from the center, assuming that the separation distance between the pair of nipping rollers is 1.