JPH0510883B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for changing a lead-in pole to a tie-down pole in a power distribution route of a live overhead distribution line.

(Prior art) Conventionally, when changing a lead-in pole to a tie-down pole while the line is live, it is necessary to install insulating protective equipment on the front and rear overhead distribution lines, lead-in arms, etc. at the point where the lead-in pole is installed. After installation, workers were directly making changes.

(Problems to be Solved by the Invention) However, with this method of work, there is a risk of electric shock, and there are problems in that it takes a lot of effort and time to attach and detach the insulating armor.

An object of the present invention is to provide a method for converting a pull-through pole into a tie-down pole, which allows work to be carried out using hot stakes without the need for insulating armor.

(Means for Solving the Problems) Means of the present invention for achieving the above object will be explained with reference to FIGS. 1 to 12, which correspond to embodiments.

In the present invention, a lead-in arm 3 is attached to a utility pole 2, a plurality of lead-in insulators 4 are attached to the lead-in arm 3, and each overhead power distribution line 5 is passed through each of the lead-in insulators 4. In the method of changing the lead-in mounting poles 1, which are each bound and fixed with binding wires 6, to a tie-down mounting pole 17, each of the lead-in insulators 4 and each of the overhead distribution lines 5 are fixed. The step of removing each of the above-mentioned bound wires 6 with a bind wire removal hot stick, and the step of raising the temporary arm 8 and pulling each of the above-mentioned overhead distribution lines 5 through each insulator 4
a step of separating upward from the pull-out arm 3;
a step of removing it from the utility pole 2 together with the lead-in insulator 4; a step of attaching the retaining arm 10 to the utility pole 2 with compression type clamps 12 attached at a plurality of locations via the tension insulator 11; A step of lowering the arm 8 to return each overhead power distribution line 5 to its original height, and peeling off a portion of each overhead power distribution line 5 near the utility pole 2 to form a skinned portion 5A. a step of tensioning the overhead power distribution line 5 by interposing a wire tensioning means 18 between a portion of the overhead power distribution line 5 beyond the peeling portion 5A and the compression type clamp 12; cutting the stripped portion 5A of the overhead power distribution line 5 in a state corresponding to the compression type clamp 12, and loosening the wire tensioning state by the wire tensioning means 18 to cut the cut end of the stripped portion 5A. a step of returning the cut end to the inlet side of the compression type clamp 12 and inserting it into the compression type clamp 12 by the tensioning action of the wire tensioning means 18 while grasping and guiding the cut end with a gripping hot stick; This method is characterized by comprising a step of compressively connecting the mold clamp 12 and the skinned portion 5A inside thereof, and a step of removing the wire tensioning means 18.

(Function) In this way, the connecting pillar 1 is held in place by the mounting pillar 17.
If you change it to , you will be able to work with hotstack. Therefore, the troublesome work of installing and removing insulating armor becomes unnecessary. In addition, when replacing the pull-in arm 3 with the retaining arm 10, each overhead power distribution line 5 is raised by the temporary arm 8, so the replacement work of the arm 3 and 10 is done directly by hand. It can be done safely. When cutting the overhead distribution line 5,
Since the overhead distribution line 5 to be cut is held on the retaining arm 10 side via the tensioning means 18, the compression type clamp 12, and the tension insulator 11, the overhead distribution line 5 will not fall even if it is cut. It will stop at the working position. Further, the cut end of the overhead power distribution line 5 is inserted into the compression type clamp 12 using the wire tensioning of the wire tensioning means 18. At this time, since the wire is stretched between the overhead distribution line 5 and the compression type clamp 12, it is easy to insert the end of the overhead distribution line into the compression clamp, and it is also easy to position the stripping position. .

(Example) Examples of the present invention will be described below with reference to FIGS. 1 to 12. As shown in FIGS. 2 and 3, the pull-out installation pole 1 has a pull-out arm 3 with a rectangular cross section fixed horizontally to the top of the utility pole 2, and the arm 3 has a plurality of pull-out arms. Through-hole insulators 4 are fixed, and overhead power distribution lines 5 of each phase are drawn through these insulators 4 and fixed with bind wires 6.

In carrying out the work, first, the binding wire 6 of each lead-in insulator 4 is cut and removed using a binding wire removal hot stick.

Next, as shown in FIGS. 4 and 5, an electrically insulating temporary arm 8 supported together with the bucket 7B at the tip of the bucket boom 7A is used to hold the wire grip part 9 of the overhead distribution line 5 of each phase. While holding it, the bucket boom 7A is raised, and the temporary arm 8 is raised as shown in FIG.

In this state, put the pull arm 3 into the bucket 7B.
The upper worker manually removes it, and instead, as shown in FIGS. 7 and 8, a retaining arm 10 with a square cross section is fixed horizontally to the utility pole 2. Holding armband 1
Compression type clamps 12 are respectively attached to each part on both sides along the longitudinal direction of 0 through tension insulators 11 either in advance or by working on the bucket 8. For example, as shown in FIG. 9, the compression type clamp 12 has a connecting portion 14 for the tension insulator 11 at one end of the clamp body 13, a wire insertion hole 15 at the other end facing toward the connecting portion 14, and a central portion. A small diameter compression part 16 in the part
The structure is equipped with In this way, the basic structure of the retaining column 17 is obtained.

Next, the temporary arm 8 is lowered together with the bucket 8, and each overhead power distribution line 5 is returned to its original height.

Once each overhead distribution line 5 has returned to its original height, fix the wire clamp 28 to the overhead distribution line 5 using a hot stake on one side of the utility pole 2 at a position close to the utility pole 2, as shown in FIG. do. In such a state,
An electrically insulating wire tensioning means 18 is temporarily installed between the wire clamp 28 and the compression type clamp 12. The wire tensioning means 18 consists of an electrically insulating wire tensioner 19 and an electrically insulating tensioning jig 20. As the wire tensioner 19, for example, one having a known hydraulic structure is used. The wire tensioner 19 and the wire clamp 28 are connected by hooking a hook portion at one end of the wire tensioner 19 into a hole of the wire clamp 28. Tension jig 2 of this example
As shown in FIG. 10, one end of the insulating tension arm 22 is connected to the insulating tension arm 22 so that it can be opened and closed by a hinge 21, and the other end is connected to the insulating tension arm 22 so that it can be opened and closed by a connecting eye bolt 23, as shown in FIG.
The insulated tension arm 22 has an insulated rope 24 attached to it.
The insulating rope 24 has a structure in which a connecting ring 25 is attached to the tip of the insulating rope 24. Wire tensioner 1
9 and the tensioning jig 20 are connected by hooking the hook portion at the other end of the tensioning jig 19 onto the connection ring 25 of the tensioning jig 20. All of this work is done using a hotstack. The wire tensioning means 18 is installed in the same way on the opposite side of the utility pole 2.

In this state, each wire tensioner 19 is operated to connect the utility pole 2.
When the overhead distribution lines 5 on both sides of the line 5 are tensioned, the overhead distribution line 5 beyond the wire clamp 28 is tensioned, and the tension insulator 11 and compression type clamp 12 are also tensioned, as shown in FIG. Arrange them in a straight line.
If the tension insulator 11 and the compression type clamp 12 are in a straight line without bending in this way, the position of the tip of the compression type clamp 12 is determined, so that the top position of the compression type clamp 12 can be used as a reference for aerial placement. Strip the wire 5. Skin stripping is performed using a skin stripping hot stick to form a skin stripping section 5A. The same procedure is performed for the overhead power distribution line 5 on the opposite side of the utility pole 2.

The overhead power distribution line 5 with the stripped portion 5A is cut by a cutting hot stake at the side A of the stripped portion 5A closer to the utility pole 2. During cutting, the stripped portion 5A and the like are held with a gripping hot stick to prevent the overhead power distribution line 5 from hanging down after cutting.

After cutting, the wire tensioner 19 is loosened, and as shown in FIG. Operate the wire tensioner 19 to pull the skin hook portion 5A, and remove the skin from the skin portion 5A.
into the wire insertion hole 15 of the compression type clamp 12.
Insert as shown in Figure 2.

After confirming that the skin stripping portion 5A is fully inserted as shown in FIG. 12, the compression hot stick 2
7 is used to compress the compression portion 16 of the compression type clamp 12, and the overhead power distribution line 5 is secured to the compression type clamp 12.

After that, the wire tensioning means 18 is removed. Such work is similarly performed on the wire tensioning means 18 on the opposite side of the utility pole 2.

Note that, after this, the overhead power distribution lines 5 on both sides, which have been completely tied down, are connected to each other by a circumferential line (not shown).

(Effects of the Invention) As explained above, in the method of changing a pull-through mounting pole to a tie-down mounting pole according to the present invention, the work can be performed using a hot stake, which eliminates the troublesome work of installing and removing insulating armor. is no longer necessary,
Work can be done efficiently and the risk of electric shock can be avoided. Furthermore, in the present invention,
When exchanging a pulling arm for a retaining arm,
Since each overhead power distribution line is separated vertically by the temporary arm, replacement of the arm can be done directly and safely by hand. Furthermore, since stripping of overhead distribution lines is carried out in a tensioned state by installing a wire tensioning means between the overhead distribution line section beyond the part to be stripped and the compression type clamp, the tip of the compression type clamp is This has the advantage that it can be done using a guideline, and the desired position can be easily confirmed and carried out. In addition, when cutting the stripped part of an overhead distribution line, the overhead distribution line is temporarily held in place by a tensioning means, so the cut overhead distribution line is prevented from falling and the work position is This has the advantage of making it easier to perform the next task. Moreover, the cut end of the skinned part is
It can be inserted into the compression type clamp while being guided by the gripping hot stick and pulled by the tensioning action of the wire tensioning means, and the inserted state is maintained by the tensioning means even when the compression type clamp is compressed after insertion. Various operations can be carried out efficiently by using the wire tensioning means.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention.
The figure is a side view of the main parts showing the wire tensioning and stripping process, Figure 2 is a front view showing an example of a lead-in column, and Figure 3 is an example of how an overhead distribution line is bound and fixed to a lead-in insulator. 4 is a side view showing the state before the overhead distribution line is lifted up by the temporary arm, FIG. 5 is a perspective view showing an example of the temporary arm, and FIG. 6 is the state where the overhead distribution line is lifted up by the false arm. Side view showing,
7 and 8 are a front view and a plan view showing an example of a restraining column, FIG. 9 is a side view showing an example of a compression clamp, and FIG. 10 is a front view and a plan view showing an example of a tensioning jig. FIG. 11 is a bottom view, and FIG. 11 is a side view showing an example of the process of inserting the stripped portion of an overhead distribution line into a compression type clamp. FIG. It is a side view which shows an example. 1... Leading pole, 2... Electric pole, 3... Leading arm, 4... Leading insulator, 5... Overhead distribution line,
5A... Stripping part, 6... Binding line, 7A...
Bucket boom, 7B...Bucket, 8...Temporary arm, 9...Electric wire grip part, 10...Retaining arm,
11...Tension-resistant insulator, 12...Compression type clamp, 1
5... Wire insertion hole, 16... Compression part, 17... Retaining post, 28... Wire clamp, 18... Wire tensioning means, 19... Wire tensioner, 20... Tensioning jig, 2
6... Hot stick for gripping, 27... Hot stick for compression.

Claims (1)

[Claims] 1. A lead-in arm is attached to a utility pole, a plurality of lead-in insulators are attached to the lead-in insulator, and each overhead distribution line is connected to each of the lead-in insulators and bound with a binding wire. In the method of changing a fixed lead-in pole to a tie-down pole, each of the bind wires fixing each of the lead-in insulators and each of the overhead distribution lines is removed using a bind wire removal hot stick. a step of raising a temporary arm to separate each of the overhead distribution lines upwardly from each of the lead-in insulators; a step of removing the lead-in arm along with the lead-in insulator from the utility pole; a step of attaching a retaining arm to the utility pole, which has compression type clamps attached at a plurality of locations via tension insulators, a step of lowering the temporary arm to return each of the overhead power lines to its original height; stripping a portion of each of the overhead power lines near a utility pole to form a skinned portion, and tensioning between the portion of the overhead power distribution line beyond the peeled portion and the compression type clamp; a step of tensioning the overhead distribution line with a wire means interposed therebetween; a step of cutting the stripped portion of the overhead power distribution line in a tensioned state in a manner corresponding to the compression type clamp; The wire is loosened and the cut end of the stripped portion is returned to the inlet side of the compression type clamp, and the cut end is gripped and guided by the gripping hot stick while being compressed by the wire tensioning action of the wire tensioning means. Changing a pull-through column to a tie-down column, which consists of a step of inserting it into a type clamp, a step of compressing and connecting the compression type clamp and the skinned part inside it, and a step of removing the tensioning means. how to.