JP4286265B2 - Temporary branch line extension method and temporary branch line retention tool in branch-type steel tower - Google Patents

Description

  The present invention relates to a method for extending a temporary branch line in a branch-type steel tower and a jig for temporary branch line retention.

  As shown in FIG. 8, the super-long-wave transmission branch towers are extended in three directions around the tower (main pillar) 100 at positions shifted downward from the top of the tower 100 in order at a certain interval. One end of the main branch line (rope) 101 is attached, and the other end of the main branch line 101 is secured to the ground. In the middle of the main branch line 101, an insulator device 102 for insulating a current flowing through the main branch line 101 is interposed. And the main branch line (rope) 101 extended in three directions is provided over about 4-7 steps | paragraphs from the top part with the fixed space | interval.

  In such a long-wave transmission branch tower, etc., it is necessary to replace the main line and the insulator device 102 that insulates the current flowing through the main line with the passage of time. When exchanging the main branch line 101 and the lever device 102, as shown in FIG. 9, the main branch line 101 is temporarily removed or replaced with the same tension as the main branch line 101 in the same direction. In order to ensure tension, a plurality of temporary branch lines 103 are extended.

In order to extend this temporary branch line 103, a temporary branch line retaining jig 104 as shown in FIGS. 10 and 11 is used. The temporary branch line retaining jig 104 is usually used by being attached to the upper column 100a of the main branch line 101 to be replaced.
The temporary branch line holding jig 104 has fixing tools 106 attached to both ends and an intermediate part of a substantially U-shaped temporary branch line arm 105, and the fixing tool 106 is fixed to each column 100 a of the tower 100. A temporary branch line retaining jig 104 is attached. Then, the temporary branch line 103 is stretched in only one direction on the temporary branch line attachments 107 at both ends of the intermediate arm 105a of the temporary branch line holding jig 104 to maintain the tension of the main branch line 101, and the main branch line 101 is replaced. Alternatively, the lever device 102 is replaced.
JP-A-8-222923 JP 2003-9325 A

  However, according to the prior art, since the main branch line 101 used as an aerial line is extended on the upper side of the temporary branch line retaining jig 104 mounting position, the main branch line 101 used as an aerial line is extended. There is a possibility that the branch line 101 and the temporary branch line 103 come into contact with each other and cause a transmission failure. Further, since the temporary branch line holding jig 104 has a structure that is applied only to the temporary branch line 103 in one direction, the main branch line 101 in the other direction cannot be replaced at the same time. In order to support the steel tower 100 vertically, 12 to 21 main branch lines 101 are used per steel tower. Since these branch lines 101 are expected to break the strands of the main branch line 101 due to the natural environment and deterioration over time, the main branch line 101 needs to be replaced.

  The present invention solves the above-described problems, prevents the contact between the main branch line and the temporary branch line during the replacement work, and simultaneously extends the temporary branch line in the branch-type steel tower capable of performing the replacement work in a plurality of directions, and the temporary branch line retention treatment. The purpose is to provide a tool.

In order to solve the above-mentioned problem, the present invention is configured such that a main support column is arranged at each vertex of a triangle, and a main branch line is extended outward from the main support column in multiple directions. In the method of extending a temporary branch line in a branch-type steel tower that extends the temporary branch line in order to replace the main branch line and / or the branch line insulator in the supported branch-line tower, at each vertex of the arm arranged to form a triangle The temporary branch line retaining jig attached with a gripping tool for gripping the main support is attached to the support in the vicinity of the main branch mounting part to be replaced of the branch tower via the gripping tool, and the tension of each main support line The main branch line to which the main branch line and / or branch insulator to be replaced is attached from the gripper attached to the support pillars on both sides of the main branch line and / or main branch line to which the temporary branch line is held. In a plan view and deployed as tension substantially in the same direction in the same direction and the side view is approximated, in a state where the branch line and / or branch line insulator to be replaced to be replaced holds the present branch line tension mounted, It is to perform exchange work.
In the present invention, the temporary branch line holding tool is constituted by a plurality of upper and lower stages of jigs in which a gripping tool for holding the main column is attached to each vertex of an arm arranged to form a triangle. Then, the temporary support lines of the upper and lower stages are extended from the upper and lower stages of jigs.
Furthermore, the present invention, the exchange and temporary branch tentative branch substantially be deployed in parallel with the branch line in plan view the branch line and / or branch line insulators is attached to be replaced through the outer tower from the gripper target The main branch line and / or the main branch line to which the branch line insulator is attached is prevented .
Still further, the present invention is configured such that a main column is arranged at each apex of a triangle, and a branch line supported by a main branch line that is extended outward from the main column in a plurality of vertical directions. In the temporary branch line holding jig for extending the temporary branch line in order to replace the main branch line and / or branch line insulator in the steel tower, the main column is placed at each vertex of the arm arranged to form a triangle. The gripping tool to be gripped is mounted, and the temporary support line mounting plate for extending the temporary support line is mounted to these gripping tools.
Further, the present invention is configured in such a manner that the gripping tool for gripping the main column is divided into two parts, and the halved portions of the gripping tools are respectively attached to the distal ends of the arms adjacent to each other, and the halved parts are fastened to each other. Thus, a gripping tool is attached to the main support column, and a temporary branch line mounting plate for extending the temporary support line in the same direction as the main support line attached to the adjacent support column is mounted on the gripping tool.
Further, in the present invention, a gripping tool for gripping the main column is attached to each apex of the arms arranged so as to constitute the triangle, and a temporary support line mounting plate for extending the temporary support line is attached to the gripping tool. It is composed of jigs with multiple upper and lower stages.

According to the first aspect, since the temporary branch line can be extended from a position away from the main branch line, the contact between the main branch line and the temporary branch line can be prevented at the time of replacement work, and transmission failure can be prevented.
According to claim 2, depending on the branch diameter, when the branch diameter is thick, the upper, by using the temporary branch of plural rows in accordance with the lower, when the branch diameter is thin, lower only tentative branch of Article 2 Can be constructed by use.
According to the third aspect, since the temporary branch line can be extended to the position farthest from the main branch line, the contact between the main branch line and the temporary branch line can be prevented during the replacement work, and the transmission failure can be prevented.
According to the fourth aspect, since the temporary branch line can be extended at a position away from the main branch line and below the main branch line, contact between the main branch line and the temporary branch line can be prevented during replacement work, and transmission failure can be prevented. be able to. Moreover, since the temporary branch line retaining jig is configured in a triangular shape, the main branch line and the branch line insulator in three directions can be exchanged at the same time.
According to the fifth aspect, since the temporary branch line holding jig can be separated for each arm, the assembly and the transport work can be easily performed.
According to claim 6, since the temporary branch line holding tool is composed of upper and lower arms, the number of temporary branch lines is two or more depending on the thickness of the main branch line. Can be set to

  The embodiments shown in the drawings will be described in detail below with reference to the drawings.

FIG. 1 is a conceptual diagram in which a temporary branch line holding tool is mounted on a branch tower for transmitting ultra-long waves, and FIG. 2 is a cross-sectional view taken along line AA in FIG.
1 and 2, a branch-type tower 1 is a three-way branch-type steel pipe truss column, which is formed by connecting three main columns 2 arranged upright at the apex of a triangle with a large number of connecting members 3. is there. Each main support column 2 is extended in a vertical direction at regular intervals, with a plurality of main branch lines 4 extending in a radial direction in three directions around the branch-type tower 1 in a plan view and obliquely downward. Has been. In the middle of the main branch line 4, an insulator device (not shown) for insulating from the ground is mounted.

The temporary branch line retaining tool 10 includes three arms 12 each having a half-shaped band 11a constituting an annular gripper 11 attached to both ends, and the half-shaped band 11a is bolted to the flanges at both ends. And are assembled so as to form a triangle. 3 and 5 show the upper annular gripping tool 11, and FIGS. 4 and 6 show the lower annular gripping tool 11.
A horizontal plate 13 is attached to the half-shaped band 11a of the gripping tool 11, and the back surface of the plate 13 is in the same direction as the main branch line 4 attached to the main column 2 disposed therebetween. A pair of provisional branch line attachment plates 14 that are vertically suspended are mounted respectively. The temporary branch line mounting plate 14 is provided with a mounting hole 16 for holding the temporary branch line 15.

  The three arms 12 mounted with the half-shaped band 11a on both ends are connected to each other between the upper and lower arms 12 by a vertical connecting member 17 and an oblique connecting member 18, respectively. The temporary branch lines 15 can be extended from the temporary branch line mounting plates 14 of the upper and lower two-stage arms 12.

Next, a method for extending a temporary branch line using the temporary branch line holding jig 10 will be described. A half band 11a is attached so as to hold each of the three main struts 2, and this half line shape is attached. The flange portions 11b on both sides of the band 11a are fastened to each other via bolts and nuts. In this way, the halved bands 11a on both sides of the arm 12 are fastened together with the halved bands 11a of the adjacent arms 12, so that the arms 12 are arranged to form a triangle. The upper and lower two-stage arms 12 are respectively attached to the main columns 2 via the half-shaped bands 11a.

  Then, as shown in FIGS. 7A and 7B, one end of the temporary branch line 15 is mounted in the mounting hole 16 of the temporary branch line mounting plate 14, and the book on both sides of the main column 2 to which the replacement main branch line 4 is mounted. The replacement main branch line 4 is substantially parallel to the replacement main branch line 4 in a plan view along the replacement main branch line 4 from the temporary branch line mounting plate 14 of the gripper 11 attached to the support column 2 and in a side view. Pull the lower side of the slant downward in a substantially parallel manner. The temporary branch lines 15 are pulled down from the temporary branch line mounting plates 14 of the upper and lower arms 12 with respect to one replacement main branch line 4 for each of the three main replacement branch lines 4 respectively.

  In this way, since the three main replacement branch lines 4 or the lever device connected to the replacement main branch line 4 can be replaced at the same time, workability is good. Since the temporary branch line 15 can take the maximum distance from the replacement main branch line 4 in plan view, the temporary branch line 15 can have a sufficient distance from the main branch line 4, thereby preventing interference with the main branch line 4. be able to.

  In addition, since the temporary branch line 15 is extended from the rear of both sides of the replacement main branch line 4, a distance in the vertical direction from the replacement main branch line 4 can be increased, so that the replacement main branch line 4A used as an aerial line There is no risk of contact (see FIG. 7B).

  In this way, it is possible to replace the three-way replacement main branch line 4 and the lever device while sequentially moving the temporary branch line retaining jig 10 in the vertical direction.

  In addition, this invention is not limited only to the said embodiment, For example, although the temporary branch line holding jig 10 was comprised in the upper and lower two stages, it can also be comprised in two or more stages. Needless to say, the present invention can be appropriately modified and implemented without departing from the scope of the present invention.

It is a conceptual diagram which shows the jig for temporary branch line retention in the branch type steel tower by embodiment of this invention. It is an AA arrow directional view which shows the temporary branch line holding jig of FIG. It is the B section enlarged view of FIG. FIG. 3 is an enlarged view of the lower part of section B in FIG. 2. FIG. 4 is a view taken along the line CC in FIG. 3. FIG. 6 is a view taken along line DD in FIG. 4. The method of extending a temporary branch line is shown, (a) is a plan view, (b) is a side view of (a). It is a conceptual diagram which shows a branch line type steel tower. It is a key map showing exchange work of this branch line in a branch line type tower. It is a conceptual diagram which shows the jig for temporary branch line retention in the conventional branch line type steel tower. It is a top view which shows the temporary branch line holding jig of FIG. The conventional temporary branch line extending method is shown, (a) is a plan view, (b) is a side view of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Branch line type steel tower 2 Two support | pillars 3 Connecting material 4 Branch line 10 Temporary branch line retention jig 11 Grasping tool 11a Half-divided band 12 Arm 13 Plate 14 Temporary branch line mounting plate 15 Temporary branch line 16 Mounting hole 17, 18 Connecting member

Claims (6)

The main branch line in the branch-type steel tower is configured so that the main pillar is arranged at each vertex of the triangle and supported by the main branch line that is extended outward from the main pillars in a plurality of vertical directions. In a method for extending temporary branch lines in a branch-line tower that extends temporary branch lines to replace branch line insulators, a gripping tool for holding the main column is attached to each vertex of the arm arranged to form a triangle. The temporary branch line holding jig is attached to the support column in the vicinity of the main branch attachment part to be replaced of the branch-type tower via the gripping tool, and the temporary branch line holding the tension of each main branch line is replaced with the main branch line to be replaced. From the gripping tool attached to the pillars on both sides of the main branch to which the branch line insulator is attached, the main branch line to be replaced and / or the main branch line to which the branch line insulator is attached are substantially the same in the same direction and side view. same And stretched so tension approximates countercurrent, temporary branch line stretched method in branch line type tower, characterized in that to hold the present branch line and / or replacement the branch line of tension branch insulator is attached to the object to be replaced . The temporary branch line holding tool is composed of a plurality of upper and lower stages of jigs each having a gripping tool for gripping the main column attached to each vertex of an arm arranged to form a triangle. The method of extending a temporary branch line in a branch-type steel tower according to claim 1, wherein a plurality of temporary branch lines are extended from a jig and tool. The temporary branch line and the main branch line to be replaced and / or the main branch line to be replaced and / or the main branch line to be replaced through the outside of the steel tower and the main branch line to which the branch insulator is attached are extended in parallel in plan view. The method of extending a temporary branch line in a branch-type steel tower according to claim 1 or 2, wherein contact with the main branch line to which a branch line insulator is attached is prevented . The main branch line in the branch-type steel tower is configured so that the main pillar is arranged at each vertex of the triangle and supported by the main branch line that is extended outward from the main pillars in a plurality of vertical directions. In the temporary branch line holding jig for extending the temporary branch line in order to replace the branch line insulator, a gripping tool for holding the main column is attached to each vertex of the arm arranged to form a triangle. A temporary branch line retaining jig in a branch type steel tower, wherein a temporary branch line mounting plate for extending the temporary branch line is attached to these gripping tools. The gripping tool for gripping the main column is divided into two parts, and the halved parts of these gripping tools are respectively attached to the distal ends of adjacent arms, and the halved parts are fastened to each other and gripped by the main column. 6. A branch line type mounting plate according to claim 4 , wherein a temporary branch line mounting plate for extending the temporary branch line in the same direction as a main branch line mounted on an adjacent column is mounted on these gripping tools. A tool for temporary branch line retention in a steel tower. A jig having a plurality of upper and lower stages in which a gripping tool for gripping the main column is attached to each apex of the arms arranged so as to constitute the triangle, and a temporary support line mounting plate for extending the temporary support line is attached to the gripping tool. The jig for temporary branch line retention in the branch type steel tower according to claim 5, wherein

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