JP3254407B2 - How to rebuild the tower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for rebuilding a tower of an overhead power transmission line.

[0002]

2. Description of the Related Art Power outages associated with the construction of overhead power transmission lines have a great effect on the field of electricity utilization, so that the time of such power outages must be kept to a minimum.

[0003] Since the same necessity as described above arises in the rebuilding work of the pylon, during the pylon rebuilding work, the pylon to be rebuilt and a place distant from the construction site by a certain distance or more to prevent electric shock accidents. It is necessary to establish a power transmission route to secure electrical connection.

FIG. 10 shows an example of a conventional method of rebuilding a steel tower. In order to secure a work site 1 which is not electrically affected, a temporary steel tower 3 which is a substitute for the rebuilding steel tower 2 is newly constructed. After that, the power transmission route that had previously passed through the rebuilding tower was transferred to a new temporary tower, and after the required tower rebuilding work was completed, the temporary transmission route was returned again.

On the other hand, there is a wrapping construction method as a method that does not require the temporary power transmission route as described above. This construction method is a method in which new members are assembled so as to be wrapped around the existing tower, and then the existing tower is dismantled and removed.

In the above-mentioned wrapping construction method, when assembling the upper part, means such as stopping the power transmission line or projecting the electric wire to a position where the distance can be secured by a temporary arm or the like is taken.

[0007]

Among the above-mentioned prior arts, in the method of rebuilding a steel tower shown in FIG. 10, since the scale of the work is large despite the provisional route, the construction of a temporary steel tower and the construction of electric wires are not possible. The cost of replacement is expensive and the construction period is long. Further, there is a problem that a temporary tower construction site is required.

[0008] On the other hand, in the wrapping construction method, it is not necessary to provide a temporary tower, but when rebuilding the tower, the work is performed in a place close to the charging part, and if the track is live, there is a concern about safety, In addition, if the track is stopped, there is a problem that the stop period becomes longer.

Therefore, the problems to be solved by the present invention (objects)
Has simplified the route for securing the electrical connection required for the rebuilding of the tower, reduced construction costs, shortened the construction period, completed the rebuilding in a short time, and reduced the distance between the construction site and the live line. It is an object of the present invention to provide a method of rebuilding a tower that can be secured.

[0010]

SUMMARY OF THE INVENTION A method for rebuilding a tower as a first means provided by the present invention is a jumper wire for electrically connecting two spans which sandwich a tower to be rebuilt for an overhead transmission line. And make the long jumper line bypass the site for rebuilding the tower, and
The overhead transmission line and the wire support point of the tower are
Connect the insulating support wire, a method of performing reconstruction work in the required tower.

In the above method, some desirable embodiments may be provided. For example, jumper wire were elongated
Is a method of supporting the support column with detour portion of the steel tower rebuilding work site.

[0012]

[0013] tower rebuilding work process as the second means for providing by the present invention, tower denominated inserting a new tower to any point in the span composed of two towers of overhead lines
In construction methods instead, to insert any insulating supporting lines between two points of the wire according to the span, and the insulating support wire
Two electric wires sandwiched by a new long jumper wire
It is a method of connecting and performing the required rebuilding of the tower .

In the above method, some desirable embodiments may be provided. For example, a new elongate jumper line is a method of being supported by a support post at a detour portion of a work site .

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the whole construction method of a tower rebuilding as a first means of the present invention, wherein a long jumper wire for electrically connecting the front and rear spans of a tower to be rebuilt is used. The length of the jumper wire 4 is detoured around the site 1 for rebuilding the tower, and is supported by the support columns 5, thereby securing the site 1 for rebuilding the tower while maintaining the electrical connection between the spans. It consists of a method of rebuilding the tower.

As described above, by supporting the elongate jumper wire 4 with the support pillar 5, it is possible to ensure the separation between the jumper wire 4 and the ground and the jumper wires of each phase. .

If the wrapping construction method is used in combination with the above-mentioned construction method, the transmission line suspension period becomes short only by the work of switching the overhead transmission line, and there is no need to construct a temporary steel tower, and the safety against electric shock accidents is eliminated. It can also improve the performance.

Also, an insulating support line of an arbitrary length is drawn from the support point of the rebuilding tower so that the connection point between the elongated jumper wire and the overhead transmission line and the rebuilding tower are separated by a certain distance or more. To secure the tension of the overhead transmission line. The terminal of the overhead power transmission line that had been connected to the steel tower until then may be connected to the elongated jumper wire using a connection fitting or the like.

FIGS. 2 to 7 show an example in which the above-described method for rebuilding the tower is implemented for the rebuilding work of the two-line tower original position, for each work process. Hereinafter, each working process will be described in order.

(1) In the work process shown in FIG. 2, a jumper wire is cut in a steel tower 2 to be rebuilt, a cam-along 7 is attached to an overhead power transmission line 6, and a wire rope 9 combined with a semi-car wheel 8 is attached to the cam-along 7. One end of the
The wire rope 9 is connected, and is wound around the winch 10 on the ground side via the overhead power transmission line support point of the tower to secure the tension of the overhead power transmission line 6. Since the terminal of the overhead transmission line having secured tension as described above is in a free state, the terminal is put in a zero tension state, the overhead transmission line is removed from the clamp, and the overhead transmission line and the insulator device 11 are lowered to the ground. .

(2) In the work process shown in FIG. 3, the overhead power transmission line 6 is placed in the clamp 12 at a position where the length of the insulating support wire is considered, and the insulator device and the support wire;
Connect.

(3) In the work process shown in FIG. 4, a support post 5 is erected beforehand or at any time at a position off the site for rebuilding the tower, and a wheel 14 is attached to the support post 5, and the wheel 14 is passed through a jumper wire 15 drawn from the drum, and the jumper wire 15 and the overhead power transmission line 6 are connected by a PG clamp 16. A cam-along 7 is hit on the jumper wire 15 and is connected to the support pillar 5 with a wire rope 17.

(4) In the work process shown in FIG. 2
The semi-wheel 8 from the pylon is wound up, and the overhead power transmission line 6 is stretched up to a specified sag.

(5) In the work process shown in FIG. 6, the wire rope 17 is wound up from the support post, and when the jumper wire has an appropriate tension, the jumper wire is placed in a clamp and fixed to the support post.

(6) In the working process shown in FIG. 7, the young jumper wire is connected by the PG clamp 16 on the scaffold 18 so that the jumper wire 4 between the support columns has an appropriate tension. The length of the jumper line will be lengthened, and the jumper line will be detoured so as to be out of the site for rebuilding the tower.

The above operation is performed for each of the upper, middle, and lower phases of the two lines, and the tower is rebuilt by a normal wrapping method.

FIG. 8 shows another embodiment of a method for rebuilding a tower as the first means of the present invention. In the case where the tower 19 to be rebuilt is a branch tower or a heavy angle tower, etc.
This is an example in which a support pillar can be omitted because a gap between the jumper line and the tower can be secured.

FIG. 9 shows an embodiment of a method for rebuilding a steel tower as the second means of the present invention, which is an example in which a new steel tower 20 is inserted in the middle of a span and constructed. In this embodiment, in order to ensure that the work location is not electrically affected, any two locations of the overhead transmission line in the span are connected by insulating support wires to secure the tension of the overhead transmission line, and A long jumper wire is attached to the power transmission line to be electrically connected, and if necessary, the jumper wire is supported by supporting columns.

In each of the above embodiments, the type of the supporting column is not limited as long as the mechanical strength permits. Specifically, iron columns, concrete columns, wooden columns, panzer masts and the like are used. it can.

As the insulating support wire, a wire having an insulating function as a single body, a wire having a conductor connected to a terminal of a conductor support wire such as a wire rope, or the like is used.

[0031]

According to the present invention as described above, the route for securing the electrical connection required for the rebuilding of the tower is simplified, the construction cost is reduced, the construction period is shortened, and the construction time is shortened. The intended task (objective) of providing a method of rebuilding a steel tower, which has been rebuilt and can secure a distance between a construction site and a live line part, can be achieved. And according to the tower rebuilding method of the present invention,
The temporary transmission route can be simplified, large land is not required, and construction costs (including material costs) and labor can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing the entire procedure of a method for rebuilding a tower as a first means of the present invention.

FIG. 2 is an explanatory view showing a first work process of the construction method shown in FIG.

FIG. 3 is an explanatory view showing a second work process of the construction method shown in FIG. 1;

FIG. 4 is an explanatory view showing a third operation step of the construction method shown in FIG. 1;

FIG. 5 is an explanatory view showing a fourth operation step of the construction method shown in FIG. 1;

FIG. 6 is an explanatory view showing a fifth operation step of the construction method shown in FIG. 1;

FIG. 7 is an explanatory view showing a sixth operation step of the construction method shown in FIG. 1;

FIG. 8 is an explanatory view showing another embodiment of a method for rebuilding a tower as a first means of the present invention.

FIG. 9 is an explanatory view showing an embodiment of a method for rebuilding a steel tower as second means of the present invention.

FIG. 10 is an explanatory diagram showing an example of a conventional method of rebuilding a steel tower.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 Construction site for rebuilding tower 2 Rebuilding target tower 4 Elongated jumper wire 5 Support pillar 6 Overhead transmission line 7 Cam-Along 8 Semi-car wheel 9 Wire rope 10 Winch 11 Insulator device 12 Clamp 13 Support wire; Galvanized steel wire 14 Gold Car 15 Jumper line 16 PG clamp 17 Wire rope 18 Scaffolding 19 Heavy angle tower 20 New breaking tower

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiromitsu Takagi 4-10-1, Kawajiri-cho, Hitachi, Ibaraki Pref. Inside Toyoura Plant of Hitachi Cable Co., Ltd. No. 1 Inside the Toyoura Plant of Hitachi Cable Co., Ltd. (56) References JP-A-8-149637 (JP, A) JP-A-62-27313 (JP, A) JP-A-55-176015 (JP, U) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) H02G 1/02 H02G 7/00 H02G 7/20

Claims (4)

(57) [Claims] A long jumper wire electrically connecting two spans sandwiching a steel tower to be rebuilt in an overhead power transmission line, and making the long jumper wire detour to a site for a steel tower rebuilding work. And the power transmission line and the tower
Connect the wire support point with an insulating support wire of any length,
Tower rebuilding work method and performing reconstruction work in the required tower. Wherein elongated by jumper lines, especially to supported by the support pillars by bypassing part of the tower rebuilding work site
The method for rebuilding a steel tower according to claim 1, wherein 3. An overhead transmission line in a span consisting of two towers.
How to rebuild a tower to insert a new tower at any point
The wire between any two points of the wire spanning said span.
Two inserting edge support lines and sandwiching the insulation support lines
Connect the wires with a new long jumper wire,
Towers characterized by rebuilding required towers
Reconstruction work method. 4. A new long jumper wire is used for a work site.
Characterized by being supported by supporting columns at the detours of
The method for rebuilding a steel tower according to claim 3 .