JP2005304241A - Temporary supporting device of jumper cable in steel tower and construction method of steel tower using device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temporary supporting device of a jumper cable in a steel tower that can expand an interval between the jumper cable and the steel tower by using the same temporary supporting device, even if conditions such as dimensions of the steel towers and voltages of overhead power cables differ from one another, and to provide a construction method of the steel tower using the device. <P>SOLUTION: The temporary supporting device 1 of the jumper cable in the steel tower temporarily expands the interval between the steel tower 3 and the long and heavy jumper cable 4 connected to the overhead power cables 2, 2 at both ends of the steel tower, when performing the construction of the steel tower 3 that supports the overhead power cable 2. The temporary supporting device 1 is detachably fixed to the steel tower 3, supports the long and heavy jumper cable 4, and comprises a telescopic extension arm 5. Since the interval between the steel tower 3 and the long and heavy jumper cable 4 can be expanded to a necessary distance by adjusting the length of the extension arm 5, one kind of the temporary supporting device 1 can cope with a variation in the voltage of the overhead power cable 2, even if it occurs. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a jumper wire temporary support device in a steel tower and a steel tower construction method using the same.

  In general, the distance between the steel tower and the jumper wires connected to the overhead power transmission lines on both sides thereof is relatively close. Therefore, when repairing a steel tower or rebuilding at the same position while charging an overhead power transmission line, it is necessary to widen the distance between the steel tower and the jumper line.

  Conventionally, as shown in FIG. 10, another steel tower 91 is temporarily installed at a location more than a certain distance from the steel tower 51 to be repaired or reconstructed, and the overhead power transmission line 52 is transferred to this steel tower 91. Since then, the tower 51 has been repaired and rebuilt.

  However, in the method of temporarily constructing the steel tower 91 at a place away from the steel tower 51 and constructing the steel tower 51 as described above, there are problems that the construction cost increases and the construction period becomes long.

  Therefore, conventionally, when a tower is repaired or rebuilt at the same position, the distance between the tower and the jumper line must be set according to the voltage of the overhead transmission line while the jumper line is supported on the tower. A method of extending the distance and constructing the steel tower has been proposed.

  Conventionally, as this type of technique, a method of rebuilding a tower of an overhead power transmission line has been proposed (see, for example, Patent Document 1).

  In this steel tower rebuilding method, as shown in FIGS. 11 (A), (B) and FIGS. 12 (A), (B), first, the jumper wire 58 of the existing steel tower 51 was removed, and this jumper wire 58 was supported. A support structure 55 longer than the arm metal 54 is attached to the existing steel tower 51, and another jumper wire 56 is connected to the overhead power transmission lines 52, 52 on both sides of the arm metal 54.

  Next, as shown in FIGS. 13A and 13B, the jumper wire 56 is attached to the insulator device 57 provided at the tip of the support structure 55, and the insulator device 59 is attached to the overhead power transmission lines 52 and 52 on both sides. Is connected to the electric wire support line 53, and the electric wire support line 53 is supported so that it can be sent out from the existing steel tower 51.

  Next, the insulator 59 is removed from the arm bracket 54, and the overhead power transmission lines 52, 52 are drawn from the adjacent steel towers 71, 71 on both sides of the existing steel tower 51, or the overhead power transmission lines 52, 52 are temporarily fixed to the existing steel tower 51. In this state, the insulator device 59 is removed from the arm bracket 54, the insulator device 59 is moved to a predetermined position for delivery, and the overhead power transmission lines 52, 52 are attached between the wire support lines 53, 53, and then FIG. , (B), a jumper wire is attached to the support structure 55 longer than the arm metal 54 to secure a work space, and a new steel tower 81 is constructed so as to wrap the existing steel tower 51. The arm of the new steel tower 81 After supporting the overhead power transmission line 52 via the insulator 82 in the gold 82, the existing steel tower 51 is disassembled together with the support structure 55.

  11 to 14, reference numerals 60a and 60b are pulleys, 61 is a wire, 62 is a winch, 72 is a jumper wire of the adjacent steel tower 71, 73 is an insulator device, 74 is a pulley, 75 is a wire, 76 is a winch, 77 is a wristwatch.

According to the conventional method for rebuilding an overhead power transmission line, the distance between the jumper wire 56 and the tower 51 can be increased to a necessary distance while the jumper line 56 that is a live part of the overhead power transmission line 52 is supported on the tower 51. Therefore, it is not necessary to provide a temporary steel tower at a location away from the steel tower 51, and the construction cost and the construction period can be shortened.
JP 2001-112131 A

  However, in the conventional method of rebuilding the tower of an overhead power transmission line, the protruding length of the support structure 55 is individually determined according to the voltage of the overhead power transmission line 52. When the extending overhead power transmission lines 52 and 52 intersect at an angle smaller than 180 degrees in the horizontal plane, it is necessary to change the protruding length of the support structure 55, and as a result, the types of the support structure 55 increase. As a result, the management becomes troublesome, and the support structure 55 needs to be individually manufactured.

  The present invention has been made in view of such problems, and even when the voltage of the overhead power transmission line is different or when the overhead power transmission line extending on both sides of the steel tower intersects at an angle smaller than 180 degrees in the horizontal plane. An object of the present invention is to provide a temporary support device for a jumper wire in a steel tower that can widen the distance between the jumper wire and the steel tower to a required distance using the same temporary support device, and a construction method for the steel tower using the jumper wire.

  The present invention employs the following means in order to solve the above problems. That is, the present invention provides a tower for temporarily expanding the interval between the tower and the jumper lines connected to the overhead power transmission lines on both sides of the tower when the tower supporting the overhead power transmission line is constructed. A temporary support device for a jumper wire, characterized in that the jumper wire is detachably fixed to the steel tower, supports the jumper wire, and includes an extendable extension arm.

  In the present invention, the distance between the jumper wire and the steel tower can be adjusted by adjusting the length of the extension arm, and the required work space can be secured, so even if the voltage of the overhead power transmission line is different, the same temporary support device Can be used to widen the distance between the tower and the jumper wire to the required distance.

  Here, in order to support the distal end portion of the extension arm, a long lifting member provided between the steel tower and the distal end portion of the extension arm is provided, and the lifting member is configured to be adjustable in length. It is desirable that

  In this case, the same lifting member can be used even when the length of the extension arm changes.

  The steel tower is provided with an existing arm that supports existing electric wires and jumper wires, and the extension arm is detachably fixed on the existing arm, and the fixed arm. It is preferable to include a moving arm that can move in the longitudinal direction and can be fixed at an arbitrary position. Thereby, the expansion / contraction function of the extension arm can be realized with a simple configuration.

  Further, the present invention is to temporarily widen the interval between the steel tower and the jumper wire by using the temporary support device for the jumper wire in the steel tower when constructing the steel tower that supports the overhead power transmission line. Features. ADVANTAGE OF THE INVENTION According to this invention, the construction cost reduction and construction period shortening of steel tower construction are attained.

As described above, according to the present invention, even when the voltage of the overhead power transmission line is different, the distance between the steel tower and the jumper line can be extended to a necessary distance using the same temporary support device. It is possible to avoid an increase in the number of types of support devices, which makes it possible to reduce costs.

  Embodiments of the present invention will be described below with reference to FIGS.

  As shown in FIG. 1, the temporary support device 1 of the jumper wire in the steel tower according to the present invention is used when repairing the steel tower 3 supporting the overhead power transmission line 2 or rebuilding the steel tower at the same position. According to the voltage of the overhead power transmission line 2, the distance between the steel tower 3 and the long jumper wire 4 provided between the diameters of the overhead power transmission line 2 is increased to a necessary distance.

  The temporary support device 1 includes a long jumper wire 4 and an extension arm 5 that is detachably fixed to the steel tower 3, and the long jumper wire 4 is locked to the tip of the jumper wire 4 and that can extend and contract.

  A long lifting member 6 is installed between the tip of the extension arm 5 and the steel tower 3. The lifting member 6 supports the weight and load on the distal end side of the extension arm 5. 1 is an existing jumper wire, 8 is an existing arm, 9 is an existing insulator device, 33 is a support wire, and 9a is a position of the insulator device after being sent into the span by the support wire 33. It is.

  Next, each of the above configurations will be described. In a state before the temporary support device 1 is attached, the existing jumper wires 7 are connected to the overhead power transmission lines 2 and 2 on both sides of the steel tower 3.

  This existing jumper wire 7 is a necessary separation between the supporting wire 33 extending in two directions from the tip of the existing arm 8 and the power transmission lines 2 and 2 attached via the insulator device 9 below the existing arm 8. Connected while keeping a distance. Since the distance between the existing jumper wire 7 and the tower 3 is set to be narrower than that required for the construction of the tower 3, when the rebuilding of the tower 3 is performed, after the power transmission is stopped, The jumper wire 7 is removed, and another long jumper wire 4 is provided at a position away from the steel tower 3 to a necessary distance. Thereafter, power transmission is started, and the rebuilding work of the tower 3 can be performed with the power transmitted.

  Further, the existing arm 8 is left as it is. Then, the temporary support device 1 is mounted on the existing arm 8.

  As shown in FIG. 2, the extension arm 5 is detachably fixed on the existing arm 8 of the tower 3, and is fixed to the fixed arm 10 substantially orthogonal to the tower 3, and is movable in the longitudinal direction of the fixed arm 10. In addition, a movable arm 11 that can be fixed at an arbitrary position is provided.

  As shown in FIG. 3, the fixed arm 10 includes a pair of angles 12 and 12. These angles 12 and 12 are fixed on the existing arm 8 with their vertical sides 13 and 13 facing each other and with a predetermined interval therebetween.

  The existing arm 8 is formed in a substantially isosceles triangular frame shape. On the arm main members 83, 83 of the existing arm 8, two channels 14, 14 that are substantially orthogonal to the center line of the existing arm 8 are provided at appropriate intervals.

  These channels 14 and 14 are detachably fixed to arm main members 83 and 83 of the existing arm 8 by a fixing jig 15.

A plurality of bolt holes 17 to be attached to the channel 14 are provided in the lateral sides 16, 16 of both the angles 12, 12 in the fixed arm 10. In addition, the code | symbol 25 in FIG. 3 is a volt | bolt which fixes the angles 12 and 12. FIG.

  Further, as shown in FIG. 4, the vertical sides 13 and 13 of the angles 12 and 12 are provided with a plurality of holes 18 on the same horizontal center line. The holes 18, 18 of both angles 12, 12 are aligned. In addition, the code | symbol 84 in FIG. 4 is an arm suspension member provided between the steel tower 3 and the front-end | tip part of the existing arm 8 in order to support the front-end | tip part of the existing arm 8. As shown in FIG.

  As shown in FIGS. 5A to 5C, the fixing jig 15 includes angles 41 and 41 for sandwiching the channel 14 and the arm main member 83 from above and below, and the channel 14 and the arm main member 83 having an angle shape. A U-shaped member 42 inserted between them and a guide plate 44 provided on the U-shaped member 42 are provided to regulate the position of the bolt 43 that tightens the angles 41 and 41.

  As shown in FIG. 2, the moving arm 11 is formed of a steel pipe. One end of the fixed arm 10 is inserted between the angles 12 and 12. Thereby, the movable arm 11 can slide in the longitudinal direction. Further, the movable arm 11 is provided with a plurality of detachable scaffold members 19 projecting on both sides thereof. An example of the scaffold member 19 is a bolt.

  As shown in FIG. 4, the moving arm 11 is fixed by holes 18 and 18 of angles 12 and 12 and bolts 20 inserted into holes (not shown) provided in the moving arm 11.

  The moving arm 11 can be expanded and contracted with respect to the fixed arm 10 by changing the positions of the holes 18 of the angles 12 and 12 and fixing the moving arm 11. As a result, the distance between the steel tower 3 and the long jumper wire 4 (see FIG. 1) locked to the tip of the moving arm 11 can be adjusted.

  An intermediate portion of the moving arm 11 is fixed to the tip of the existing arm 8 by a fixing bracket 24. The fixing bracket 24 is configured to sandwich the movable arm 11 and the arm suspension member 84 that lifts the existing arm 8 from above and below with an angle or the like.

  As shown in FIG. 3, reinforcing members 21 and 21 are provided at both ends of the channels 14 and 14 that fix the angles 12 and 12 of the fixed arm 10. Further, a steadying member 45 is provided between both ends of the channel 14 far from the steel tower 3 and the tip of the moving arm 11. The steady rest member 45 has a strip-shaped steel plate fixed to the tip of the movable arm 11 and provided with a large number of bolt holes, and a strip-shaped adjuster provided with a large number of bolt holes to be attached to the steel plate at different positions. A metal fitting (none of which is shown), a steel rod 22 attached to the adjustment metal fitting, and a turnbuckle 23 for adjusting the tension are provided. The steel plate and the adjustment fitting of the steadying member 45 are configured in the same manner as the steel plate 26 and the adjustment fitting 27 of the lifting member 6 described below.

  As shown in FIG. 6, the lifting member 6 (see FIG. 1) is provided between a portion higher than the moving arm 11 of the steel tower 3 and the tip of the moving arm 11.

  The lifting member 6 includes a steel plate 26 obliquely fixed to the moving arm 11, an adjustment fitting 27 provided at the tip of the steel plate 26, a steel rod 28 provided between the adjustment fitting 27 and the steel tower 3, 28.

The steel bars 28, 28 are provided with turnbuckles 29 for adjusting the tension. Further, as shown in FIG. 7, a steel plate 30 to be attached to the adjustment fitting 27 is provided at one end of the steel rod 28.

  As shown in FIG. 8, the adjustment fitting 27 is provided with a plurality of bolt holes 31. The length of the lifting member 6 can be adjusted by changing the position of the bolt hole 31 of the adjustment fitting 27 and fastening the steel plate 30 welded to the steel rod 28 with the bolt 40.

  As shown in FIG. 8, an insulator device 32 is detachably provided at the distal end of the moving arm 11. The insulator device 32 includes a jumper wire support insulator 35 and a gripping fitting (for example, a round wire clamp) 34 that grips the jumper wire 4.

  A mounting bracket 36 is attached between the moving arm 11 and the insulator device 32. Steel plates 37 are provided at both ends and lower ends of the mounting bracket 36. The outer steel plate 37 is provided with a steel plate 38 protruding downward. The insulator device 32 is attached to the steel plate 38 in a substantially horizontal state.

  In addition, as shown in FIG. 9, the insulator apparatus 32 can also be attached to the steel plate 37 provided in the lower end of the attachment metal fitting 36 in the substantially vertical state according to the condition.

  Moreover, among each member which comprises this temporary support apparatus 1, the steel plate, a shape steel (angle), a flat steel, a steel bar (steel bar), a steel pipe, and a bolt prescribed | regulated to the electrical equipment technical standard adapted the same standard. Made of material.

  As described above, the temporary support device 1 of the present invention can be expanded and contracted in the direction in which the moving arm 11 of the extension arm 5 is separated from or approaches the fixed arm 10 and can be fixed at an arbitrary position.

  Thereby, since the space | interval of the tower 3 and the jumper wire 4 latched by the front-end | tip of the temporary support apparatus 1 can be adjusted, even when conditions, such as the magnitude | size of the tower 3 and the voltage of the overhead power transmission line 2, change, it is the same. The temporary support device 1 can be used to increase the distance between the steel tower 3 and the jumper wire 4 to a necessary distance.

  Therefore, even when the voltage of the tower 3 or the overhead power transmission line 2 is changed, the temporary support device 1 can be used without increasing the types of the temporary support device 1. Down is possible. Furthermore, the construction cost can be reduced.

  In addition, since the length of the steadying member 45 and the lifting member 6 that support the tip of the extension arm 5 can be adjusted, even if the length of the extension arm 5 changes, it can be handled by one type of lifting member 6 and its management. In addition, the cost can be reduced.

  Furthermore, since the extension arm 5 uses a fixed arm 10 formed of an angle as a main member and a moving arm 11 formed of a steel pipe, the configuration can be simplified and the cost can be reduced.

It is a perspective view which shows the state which attached the temporary support apparatus of the jumper wire which concerns on embodiment to the steel tower. It is a top view which shows the temporary support apparatus which concerns on embodiment, and is A arrow view of FIG. It is a top view which shows the fixed arm of the existing arm and extension arm which concern on embodiment. It is a side view which shows the existing arm which concerns on embodiment, and the fixed arm of an extension arm, and is B arrow line view of FIG. It is a figure which shows the fixing jig which concerns on embodiment, FIG. 5 (A) is a top view, FIG.5 (B) is a C arrow line view of FIG. 5 (A), FIG.5 (C) is FIG.5 (B). FIG. It is a side view which shows the temporary support apparatus which concerns on embodiment, and is E arrow line view of FIG. It is a top view which shows the lifting member which concerns on embodiment, and is F arrow line view of FIG. It is a figure which shows the state which attached the insulator apparatus which concerns on embodiment horizontally. It is a figure which shows the state which attached the insulator apparatus which concerns on embodiment vertically. It is a perspective view which shows the steel tower construction method which concerns on a prior art example. It is a figure which shows the steel tower rebuilding method which concerns on a prior art example, FIG. 11 (A) is a top view which shows the state before construction, FIG.11 (B) is a front view. It is a figure which shows the steel tower rebuilding method which concerns on a prior art example, FIG. 12 (A) is a top view which shows the state immediately after attaching a jumper wire, FIG.12 (B) is a front view. It is a figure which shows the steel tower rebuilding method which concerns on a prior art example, FIG. 13 (A) is a top view which shows the state which extended the jumper wire to both sides, FIG.13 (B) is a front view. It is a figure which shows the steel tower rebuilding method which concerns on a prior art example, FIG. 14 (A) is a top view which shows the relationship between the existing steel tower and a new steel tower, FIG.14 (B) is a front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Temporary support device 2 Overhead power transmission line 3 Steel tower 4 Long jumper wire 5 Extension arm 6 Lifting member 7 Existing jumper wire 8 Existing arm 9 Insulating device 9a Insulating device 10 Fixed arm 11 Moving arm 12 Angle 13 Vertical side portion 14 Channel 15 Fixing jig 16 Horizontal side portion 17 Bolt hole 18 hole 19 Scaffolding member 20 Bolt 21 Reinforcing member 22 Steel rod 23 Turnbuckle 24 Fixing bracket 25 Bolt 26 Steel plate 27 Adjusting bracket 28 Steel rod 29 Turnbuckle 30 Steel plate 31 Bolt hole 32 Insulator 33 Supporting wire 34 Grip metal fitting 35 Jumper wire support insulator 36 Mounting bracket 37 Steel plate 38 Steel plate 40 Bolt 41 Angle 42 U-shaped member 43 Bolt 44 Guide plate 45 Stabilizing member 51 Existing steel tower 52 Overhead power transmission line 53 Electric wire support wire 54 Arm Gold 55 support structure 56 jumper wire 57 insulator device 58 jumper wire 59 insulator device 60a, 60b pulley 61 wire 62 winch 71 adjacent steel tower 72 jumper wire 73 insulator device 74 pulley 75 wire 76 winch 77 arm metal 81 new metal tower 82 Arm main material 84 Arm suspension member 91 Steel tower

Claims (4)

Temporary support device for jumper wires in a steel tower for temporarily expanding the distance between the steel tower and jumper wires connected to the overhead power transmission lines on both sides of the steel tower when constructing a steel tower that supports the overhead power transmission line Because
A temporary support device for a jumper wire in a steel tower, which is detachably fixed to the steel tower, supports the jumper wire, and includes an extendable arm. In order to support the distal end portion of the extension arm, a long lifting member provided between the steel tower and the distal end portion of the extension arm,
The temporary support device for a jumper wire in a steel tower according to claim 1, wherein the lifting member is configured to be adjustable in length.   The steel tower is provided with an existing arm that supports an existing jumper wire, and the extension arm is detachably fixed on the existing arm, and moves along the longitudinal direction of the fixed arm. The temporary support apparatus of the jumper wire in the steel tower of Claim 1 or 2 provided with the movable arm which can be fixed to arbitrary positions.   When constructing a steel tower for supporting an overhead power transmission line, the temporary support device for a jumper wire in the steel tower according to claim 1 is used to temporarily widen the distance between the steel tower and the jumper wire. How to construct a steel tower.

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