JP4046171B2 - An electric wire drum for winding up a prefabricated electric wire series for a complete prefabricated wire construction method, and an electric wire winding method on the electric wire drum. - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention winds a prefabricated electric wire for a complete prefabricated wire construction method in which a plurality of prefabricated electric wires are continuously connected via a split wire in order to extend a plurality of tension supporting sections as one extended line. The present invention relates to an electric wire drum to be taken and a method of winding an electric wire to an electric wire drum for winding the prefabricated electric wire string around the electric wire drum.
[0002]
[Prior art]
In recent years, in addition to a complete prefabricated overhead wire construction method for a single tension support section that uses a prefabricated wire with compression-type retaining clamps connected to both ends of the wire, a number of tension supports have been developed. A complete prefabricated overhead wire construction method has been put into practical use in which a section is drawn as a stretched section. In addition, a tension | tensile_strength support area refers to the area between adjacent tension steel towers in an overhead power transmission line, and also includes the case where there is a suspended steel tower in the middle.
In this case, as shown in FIGS. 12 (a) and 12 (b), a prefabricated electric wire series 3 in which a plurality of prefabricated electric wires 1 matched to a plurality of tension-supporting sections are successively connected in series through split wires 2. The wire is drawn using. The prefabricated electric wire 1 is obtained by compressing and connecting a compression-type retaining clamp 4 to both ends, and in the illustrated example, a connecting metal fitting 5 for facilitating the wire-tightening work is connected. Reference numeral 6 denotes a wire connector for connecting the split wire 2.
In the following description, the number of prefabricated electric wires 1 included in the prefabricated electric wire series 3 is expressed as a strip. That is, the prefabricated wire series 3 shown in FIG. 12 is shown for the three tension support sections. In this case, the first prefabricated wire 1 (first wire 1a) and the second prefabricated wire 1 ( There are three strips composed of the second strip wire 1b) and the third strip prefabricated wire 1 (third strip wire 1c). Therefore, the wire drum that winds up the three prefabricated wire series 3 has three strips. In addition, the compression-type tension clamp 4 at the front and rear ends of each strip is shown separately from 4a, 4a ′, 4b, 4b ′, and the like in the following description. In some cases, the split wire 1 is shown by dividing the split wire between the first wire 1a and the second wire 1b from 1a, and the split wire between the second wire 1b and the third wire 1c from 1b.
[0003]
As an electric wire drum for winding up this kind of prefabricated electric wire series 3, the present inventor previously divided a body portion 9 in the drum width direction by a partition plate 8 as shown in FIGS. An electric wire drum 12 (Patent No. 2784723) which forms a section and is provided with a fixed clamp stand 10 and a movable clamp stand 11 for preventing wire damage in the vicinity of the mouth of the compression-type retention clamp 4 in the prefabricated wire series 3. (See JP 7-336825 A) and the like.
[0004]
[Problems to be solved by the invention]
By the way, the wire drum 12 that winds up the prefabricated wire train 3 used in the complete prefabricated wire construction method generally has an upper limit of the height limit for truck transportation in order to maximize the winding amount of the accommodated wire. in use. The number of divisions by the partition plate 8 is generally 2 to 3 divisions. Further, the electric wire drum 12 is complicated in structure by providing the partition plate 8 and the clamp stands 10 and 11, and the price becomes high. For this reason, this kind of electric wire drum used in the complete prefabricated overhead wire construction method is generally used as a single type or a limited type of electric wire drum with a maximum size of 2 to 3 as described above. It is.
[0005]
On the other hand, the span length between steel towers varies greatly depending on the scale of the transmission line to be applied. For example, the average span length is 600 to 700 m in the UHV transmission line, but 300 to 400 m in the 275 kV transmission line. Yes, for example, when a three-segment wire drum used for a large-scale transmission line is applied to a small-scale transmission line, the amount of winding of the wire per drum is greatly reduced, and the winding of the wire is increased. . Even in a small-scale power transmission line, the size of the electric wire drum itself does not change, so the storage location of the electric wire drum, the transportation cost, and the change of the electric wire drum in the extension line (the next extension performed when one extension section is completed) Is the same as a large-scale power transmission line), which increases the cost per unit length of the wire, making it difficult to apply the complete prefabricated wire construction method to a small-scale power transmission line. There is.
[0006]
In such a case, increasing the number of tension support sections extending in one extension section, and thus increasing the number of divisions (number of sections) of the electric wire drum lowers the construction cost of the small-scale transmission line. This is effective, but when the number of divisions of the electric wire drum is increased to 4 or more, even if a partition plate is added to the existing electric wire drum of 2 to 3 divisions or newly manufactured, an expensive electric wire is used. The drum becomes even more expensive.
In addition, when adding a partition plate to an existing wire drum, there is a limit on the width of the drum base that accommodates the wire drum when applying the wire and applies braking force to the wire drum. The width of each section becomes narrower due to the increase in the number of sections as the horizontal width decreases, and there is a possibility that the electric wires come into contact with the partition plate during the manufacture of the electric wires, resulting in injury. In addition, there is a disadvantage that it is difficult to perform various width adjustment operations for attaching various pedestals such as clamp stands in each section and for aligning winding.
[0007]
The present invention has been made in order to eliminate the above-mentioned conventional drawbacks. As an electric wire drum for winding up a prefabricated wire series for a complete prefabricated wire construction method in which a plurality of tension-supporting sections are extended as one extended section, The wire drum can be used, and the number of sections of the wire drum can be substantially increased by using multi-layer winding to minimize the occurrence of winding space in the wire drum, thereby making the complete prefabricated wire construction method inexpensive. An object of the present invention is to provide an electric wire drum for winding a prefabricated electric wire series for a complete prefabricated overhead wire method and a method for winding an electric wire on the electric wire drum, which can be applied to a small-scale power transmission line at a low cost.
[0008]
[Means for Solving the Problems]
The invention of claim 1 which solves the above-mentioned problem is a complete prefabricated overhead wire in which a plurality of prefabricated electric wires are continuously connected via a split wire in order to extend a plurality of tension supporting sections as one extended section. An electric wire drum that winds up a prefabricated electric wire series for the construction method,
A multi-layer winding partition member comprising a circumferential partition placed on an aligned wound wire on the body and a width partition that rises vertically from one end of the circumferential partition in the drum width direction. It is characterized in that a plurality are provided at intervals.
[0009]
The second aspect of the present invention provides a prefabricated electric wire connection for a complete prefabricated wire construction method in which a plurality of prefabricated electric wires are continuously connected via a split wire in order to extend a plurality of tension supporting sections as one extended line. An electric wire winding method for winding an electric wire drum to an electric wire drum,
A first step of winding the first wire for one tension support section in one section in the trunk portion by aligned winding, a peripheral partition portion placed on the aligned wound wire layer on the trunk portion, and the peripheral partition A plurality of multi-layer winding partition members each having a width partition portion that rises perpendicularly from one end portion in the drum width direction of the portion are arranged on the aligned winding layer of the first wire with a space in the drum circumferential direction. A second step of winding the vicinity of the split wire including the compression-type retention clamp at the rear end of the first wire and the compression-type retention clamp at the front end of the second wire on the peripheral partition portion of the multilayer winding partition member; And a third step of winding the second wire on the aligned winding layer of the first wire on the outside of the width partition portion of the multi-layer winding partition member.
[0010]
According to a third aspect of the present invention, in the third step in the method of winding an electric wire onto the electric wire drum according to the second aspect, the rigidity which is not affected by the unevenness of the surface of the aligned wound wire on the aligned winding layer of the first wire. After providing the edge cutting layer which consists of a board or a sheet | seat with a 2nd line | wire, it winds up on the said edge cutting layer, It is characterized by the above-mentioned.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. The present invention wraps a prefabricated electric wire for a complete prefabricated wire construction method in which a plurality of prefabricated electric wires are continuously connected via a split wire in order to extend a plurality of tension supporting sections as one extended line. The prefabricated electric wire series which is the object in this embodiment has a structure as shown in FIG. 12, for example, and the description of the prefabricated electric wire series 3 will not be repeated.
[0012]
FIG. 1 shows a drum body 21 of an electric wire drum 20 according to an embodiment of the present invention. The present invention can use an existing electric wire drum. Therefore, the drum body 21 itself of the electric wire drum 20 of the embodiment shown in FIG. 1 is basically the same as the conventional electric wire drum 12 shown in FIG. Are the same. That is, the drum body 21 divides the body portion 23 in the drum width direction by the partition plate 22 to form, for example, three sections in the illustrated example, and the wire damage in the vicinity of the mouth of the compression-type retention clamp 4 in the prefabricated wire series 3. As a clamp stand for preventing the above, the fixed clamp stand 24 is fixed to the flange 26, and the movable clamp stand 25 is attached to the partition plate 22 so that its position can be adjusted in the circumferential direction. Reference numeral 27 denotes a shaft hole.
[0013]
The electric wire drum 20 of the present invention uses a multi-layer winding partition member 33 as shown by a two-dot chain line in FIG. 1 in addition to the existing electric wire drum (that is, the drum main body 21).
As shown in FIGS. 2, 10, etc., the multi-layer winding partition member 33 includes a peripheral surface partition portion 31 placed on the already wound wire layer on the trunk portion 23 and the drum width of the peripheral surface partition portion 31. As shown in FIG. 6, a plurality of parts are arranged at intervals in the circumferential direction of the drum.
[0014]
FIG. 2 shows a state in which an electric wire is wound around the portion A in FIG. 1. The electric wire winding method of the present invention performed using the multilayer winding partition member 33 is performed, for example, by the following procedure. Here, the term “electric wire” refers to the prefabricated wire series 3 when referring to the entire wire, and the prefabricated wire 1 (1a, 1a ′, 1b, 1b ′, 1c. ).
(1) First, in the first section between the flange 26 of the trunk portion 23 of the electric wire drum 20 and the partition plate 25, the first tension support section for a plurality of tension support sections included in the one-line section is used. The electric wire, that is, the first wire 1a is aligned and wound.
This layer of the first wound electric wire 1a wound in an aligned manner is referred to as an aligned wound electric wire layer (or an aligned wound layer). In this case, the compression-type retention clamp 4a (see FIG. 12) at the tip of the first wire 1a is placed on the fixed clamp stand 24 (not shown) and aligned and wound. In addition, when the compression-type retention clamp is put on a clamp stand or the like, the connection fitting 6 is actually put together, but the description is omitted.
(2) Next, on the aligned winding layer of the first wire 1a, a plurality of the multi-layer winding partition members 33 are arranged at intervals in the drum circumferential direction as shown in FIG. As a result, a new section for winding the second wire 1b is formed outside the multilayer winding partition member 33 (outside the width partition portion 32 (right side in FIG. 2)), and the multilayer winding partition member 33 On the inner side (left side in FIG. 2), a space for accommodating the compression-type retention clamp and the split wire is formed. Therefore, while arranging the multi-layer winding partition member 33 in the circumferential direction as described above, the compression-type retention clamp at the rear end of the first wire 1a from above the peripheral partition portion 31 inside the multi-layer winding partition member 33. 4a 'and the vicinity of the split wire 2a including the compression type tension clamp 4b at the tip of the second wire 1b are wound up. Each compression type tension clamp 4a ′, 4b is placed on a rubber protector 40 and wound.
2 are not shown in the same cross section as in FIG. 2 if they are arranged as shown in FIG. 6, but inside the multi-layer winding partition member 33, the compression type tension clamps 4a ′, 4b, 4b ′ and the like in FIG. It is shown schematically that they are arranged.
(3) Next, the second wire 1b is wound on the aligned winding layer of the first wire 1a of the new section formed outside the multi-layer winding partition member 33.
(4) Next, the third wire 1c is wound around the next section partitioned by the partition plate 22. In this case, the compression-type retention clamp 4b ′ at the rear end of the second wire 1b is placed on the aligned winding layer of the second wire 1b via the protector 40, and after the split wire 2b is wound, the tip of the third wire 1c is wound. Is mounted on the movable clamp stand 25 (not shown), and then the third wire 1c is wound around the next section.
In the same manner, the wires (prefabricated wires 1) included in the prefabricated wire series 3 are successively wound around predetermined sections of the body portion 23 of the wire drum 20. In the case of the three-division (three-division) electric wire drum 20 shown in FIG. 1, normally two layers can be wound for each division, so a total of six windings are possible. However, there is a case where one tension support section is long and one wire occupies one section.
[0015]
In addition, inside the multi-layer winding partition member 33, the compression end tension clamps 4a 'and 4b and the split wire 2a are usually wound, as shown in FIG. However, this rear end portion 1a ′ originally corresponds to the last layer in the section of the first wire 1a. Therefore, depending on the position (width direction position) of the terminal portion of the first wire 1a in the section, the multilayer winding partition member 33 is installed toward the opposite side (fixed clamp cradle 24 side) as shown in FIG. You can also.
[0016]
FIG. 4 shows a cross section of a portion of the electric wire drum 20 without the compression type clamping clamps 4a ′ and 4b at a position shifted in the circumferential direction from the cross sectional position shown in FIG.
Moreover, when the last layer in the said division of the 1st line | wire 1a corresponds to the said division, since it is not necessary to wind up the rear-end part of the 1st line | wire 1a inside the multilayer winding partition member 33, it shows in FIG. Thus, only the split wire 2a is arranged inside the multilayer winding partition member 33.
[0017]
The situation in which the multilayer winding partition member 33 is arranged will be further described with reference to FIG. 6. As described above, the multilayer winding partition member 33 has the first wire 1a in the complete final layer ( After the final layer covering the entire section width is formed, it is arranged at intervals in the circumferential direction. The operation is to wind the rear end portion 1a ′ of the first wire 1a or the portion of the split wire 2a. In some cases, the multi-layer winding partition members 33 are sequentially disposed and fixed by the rear end portion 1a ′ of the first wire 1a wound on the peripheral partition portion 31 or the split wire 2a. In FIG. 6, the split wire 2a is actually wound, for example, 2-3 times, but the length is omitted in the figure.
Further, the second wire 1b locked to the compression-type retention clamp 4b provided at the tip of the second wire 1b is a gap between the multilayer winding partition members 33 arranged in the circumferential direction (arrow in FIG. 6). From (a)), it is wound up in a new section for the second wire 1b formed outside the multi-layer winding partition member 33.
[0018]
FIG. 7 shows the installation status of the compression type tension clamps 4 (4a ′, 4b, etc.) and the connecting metal fittings 5 installed inside the multilayer winding partition member 33. FIG. In order to prevent excessive bending of the electric wire in the vicinity of the mouth of the compression type retaining clamp 4 and damage to the aligned winding electric wire (lower winding electric wire) 1a due to the connecting metal fitting 5, the upper portion of the aligned winding electric wire (or the peripheral partition portion 31). The above-described rubber protector 40 is disposed on the upper part), and the compression-type tension clamp 4 and the connecting metal fitting 5 are placed in the groove on the upper surface of the protector 40. The connecting metal fitting 5 in the illustrated example has a right angle clevis link 5b on both sides of a special right angle clevis link 5a. Reference numeral 41 denotes a mouth protector that protects excessive bending of the electric wire in the vicinity of the mouth of the compression type retaining clamp 4.
[0019]
When winding the second wire 1b directly on the final layer of the first wire 1a of the new section formed on the outside of the multi-layer winding partition member 33, as shown in FIG. The second wire 1b is stacked between adjacent wires formed in the last layer 1a. For this reason, when gaps are generated on both sides of the lowermost layer of the aligned winding 1b of the second wire 1b and the second wire 1b is further aligned and wound, as shown in the drawing between the multilayer winding partition member 33 and the second wire 1b. There is a high possibility that a gap (a range indicated by B) is generated, and as a result, a step-down occurs in the second wire 1b as indicated by an arrow a, and there is a possibility that aligned winding becomes impossible.
In order to prevent this, as shown in FIG. 8 (a), on the aligned winding wire layer of the first wire 1a, the width of the first winding wire 1a matches the new section width, and the unevenness on the surface of the aligned winding wire 1a. After providing the edge cutting layer 45 made of a plate or sheet having rigidity that is not affected, the second wire 1b may be wound on the edge cutting layer 45. In consideration of the rigidity that is not affected by the unevenness between the wires, the edge cutting layer 45 may be a plastic or hard rubber plate or sheet having a thickness of about 5 mm to 25 mm, for example.
[0020]
As shown in FIG. 9, an edge cutting layer 45 ′ may be formed integrally with the multilayer winding partition member 33 ′.
[0021]
Since a side pressure due to winding of the second wire 1b acts on the multi-layer winding partition member 33, a partition plate presser 46 as shown in FIG. It may be arranged as indicated by a two-dot chain line in (b). In this case, after the compression tension clamps 4a ′ and 4b, the split wire 2a and the rear end portion 1a ′ of the first wire 1a are wound inside the multi-layer winding partition member 33, the partition plate holder 46 is moved to the position shown in FIG. ), The partition plate holder 46 is held in the state shown in FIG. 10 by the frictional force due to the side pressure acting on the multilayer winding partition member 33 and effectively falls. Fulfills the function of prevention. The multilayer winding partition member 33 and the partition plate retainer 46 are preferably made of plastic.
[0022]
As described above, each prefabricated wire 1 of the prefabricated wire series 3 is originally connected by a split wire 2, but it is also possible to attach the split wire 2 at the wire drawing site. In this case, it is not excluded that the wire drum of the present invention is temporarily connected with a connecting rope or the like for continuous winding at a factory.
[0023]
The present invention can also be applied to an existing electric wire drum having only one section without a partition plate. In this case, by using the multi-layer winding partition member 33, a normal wire drum having only one section can be made into two-strand winding or the like.
[0024]
【The invention's effect】
According to the present invention, it is possible to make one section of the electric wire drum, for example, two-layer winding by using the multi-layer winding partition member, and to substantially increase the number of divisions of the existing electric wire drum. Can be realized easily.
Therefore, even with a large existing wire drum of about 2 to 3 divisions used in the complete prefabricated overhead wire construction method for large-scale power transmission lines, this is further increased in the number of substantial divisions for overhead transmission work for small-scale transmission lines, It is possible to minimize the occurrence of winding vacancies in the electric wire drum, and at the same time, it is possible to increase the number of tension support sections in the one line section. Therefore, it is possible to eliminate waste such as the storage location of the electric wire drum, the transportation cost, and the exchange of the electric wire drum in the extension line (replacement with the electric wire drum for the next extension section performed when one extension section is completed). Therefore, the cost per unit length of the electric wire can be greatly reduced, and the application of the complete prefabricated overhead wire method to a small-scale transmission line becomes easy.
[0025]
In addition, there is no significant increase in cost as the number of wire drum divisions increases, and unlike the method of adding a partition plate, there is no problem that the width of the existing wire drum section becomes narrow. The problem is that the wires come into contact with the partition plate during the manufacture of the wires, causing trauma, and making it difficult to perform the width adjustment work for mounting and aligning various pedestals such as clamp stands in each compartment Does not occur.
[Brief description of the drawings]
FIG. 1 is a front view of a wire drum before winding up an electric wire of an embodiment of the present invention.
FIG. 2 is a diagram for explaining a procedure for winding an electric wire on the electric wire drum of FIG. 1, and is a schematic view of a portion A of FIG. 1 shown at the stage where the electric wire drum of FIG. It is sectional drawing.
FIG. 3 is a diagram showing a case where the multi-layer winding partition member is installed in a different direction in FIG. 2;
4 is a cross-sectional view of a portion of the electric wire drum that does not have a compression-type tension clamp that is displaced in the circumferential direction from the portion shown in FIG. 2;
FIG. 5 is a cross-sectional view of a portion of the wire drum without a compression-type retaining clamp that is circumferentially displaced from the portion shown in FIG. 3, and the final winding layer in the section of the first wire is the section width; If it matches
6 is a diagram for explaining a situation in which the multilayer winding partition members are arranged at intervals in the circumferential direction on the aligned winding layer of the first wire in the above-described electric wire drum, and is a cross-sectional view taken along the line B-B in FIG. It corresponds to the figure.
FIG. 7 is a view for explaining the installation state of a compression type tension clamp and a connecting metal fitting arranged on the inner side of a multilayer winding partition member.
8A is a cross-sectional view corresponding to FIG. 3 for explaining an embodiment in the case where an edge cutting layer is provided, and FIG. 8B is a cross-sectional view illustrating a problem in the case where no edge cutting layer is provided.
FIGS. 9A and 9B show an embodiment in which an edge cutting layer is integrally provided on a multilayer winding partition member, where FIG. 9A is a front view of the multilayer winding partition member, and FIG. 9B is a right side view thereof.
FIGS. 10A and 10B show specific examples of the multi-layer winding partition member, wherein FIG. 10A is a plan view, FIG. 10B is a front view, and FIG. 10C is a right side view. The arrangement | positioning point of the partition board presser for the fall prevention of the partition member for winding is shown with the dashed-two dotted line.
11A and 11B show a partition plate presser for preventing the above-described multilayer winding partition member from overturning. FIG. 11A is a plan view and FIG. 11B is a front view.
FIG. 12 is a side view illustrating an example of a prefabricated electric wire series wound up by the electric wire drum.
13A is a front view of a conventional electric wire drum, and FIG. 13B is a right side view thereof.
[Explanation of symbols]
1 Prefabricated wire 1a 1st wire (prefabricated wire)
1b Second wire 1c Third wire 2 Split wire 2a Split wire 2b between the first wire and the second wire Split wire 3 between the second wire and the third wire 3 Prefabricated wire series 4 Compression type clamp 4a ' Compressive retention clamp 4b at the rear end of the first line electric wire Compression compression clamp 4b 'at the front end of the second electric line Compressive retention clamp 4c at the rear end of the second electric line Compressive retention clamp at the front end of the third electric wire Clamp 5 Connecting metal fitting 20 Electric wire drum 21 Electric wire drum main body 22 Partition plate 23 Body 24 Fixed clamp stand 25 Movable clamp stand 26 鍔 40 Protector 45 Edge cutting layer

Claims (3)

A wire drum that winds up a prefabricated wire series for a complete prefabricated wire construction method in which a plurality of prefabricated wires are connected continuously through a split wire in order to extend a plurality of tension support sections as a single wire section. There,
A multi-layer winding partition member comprising a circumferential partition placed on an aligned wound wire on the body and a width partition that rises vertically from one end of the circumferential partition in the drum width direction. An electric wire drum for winding up a prefabricated wire series for a complete prefabricated wire construction method, wherein a plurality of prefabricated wire construction methods are provided at intervals. In order to extend a plurality of tension support sections as a single wire section, a plurality of prefabricated wires are continuously connected via a split wire to wind a prefabricated wire series for a complete prefabricated wire construction method around a wire drum. An electric wire winding method on an electric wire drum,
A first step of winding the first wire for one tension support section in one section in the trunk portion by aligned winding, a peripheral partition portion placed on the aligned wound wire layer on the trunk portion, and the peripheral partition A plurality of multi-layer winding partition members each having a width partition portion that rises perpendicularly from one end portion in the drum width direction of the portion are arranged on the aligned winding layer of the first wire with a space in the drum circumferential direction. A second step of winding the vicinity of the split wire including the compression-type retention clamp at the rear end of the first wire and the compression-type retention clamp at the front end of the second wire on the peripheral partition portion of the multilayer winding partition member; And a third step of winding the second wire on the aligned winding layer of the first wire on the outside of the width partition portion of the multi-layer winding partition member. In the third step, an edge cutting layer made of a plate or sheet having rigidity that is not affected by unevenness on the surface of the aligned winding electric wire is provided on the aligned winding layer of the first strip electric wire, and then the edge cutting layer The method of winding up a wire on a wire drum according to claim 2, wherein the second wire is wound on the wire.

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