JP4854293B2 - Maintenance method of existing synthetic resin pipes - Google Patents

Description

  The present invention relates to a maintenance method for an existing synthetic resin pipe useful for repairing or adding a synthetic resin pipe that protects a grounding wire installed near a utility pole.

  Synthetic resin pipes that cover the grounding wires installed near the power poles are repaired or repaired if they are damaged or the ground length is insufficient after installation. Need to do. Previously, plastic pipes were replaced when damaged or when there was insufficient ground clearance. However, replacement work is not an easy task for anyone, and it may be necessary to dispatch a separate worker. It took time, effort, and expense.

  Therefore, in order to facilitate the replacement work, a grounding wire clothing body has been devised that is flexible and has a notch and is easy to mount (see Patent Document 1).

  However, although such a grounding wire body is easy to install, it has not been considered for repairing only a damaged part or adding only a part where the ground is insufficient.

Japanese Utility Model Publication No. 5-11331

  In view of the above-described problems, the present invention can easily repair only a damaged portion of an existing synthetic resin pipe used for protecting a grounding wire installed near a utility pole or add only a portion above and below the ground. It aims at providing the maintenance method of the existing synthetic resin pipe.

The first aspect of the present invention that solves the above problem is that, with respect to an existing synthetic resin tube used for protection of a grounding wire installed in the vicinity of a utility pole, an inner diameter and flexibility that are substantially the same as those of an existing synthetic resin tube Maintenance in which one of the thick portions is inclined toward the inner peripheral side from the outer peripheral side and the other is inclined to the opposite side in the thick portion. The existing synthetic resin pipe maintenance method is characterized in that the existing synthetic resin pipe is maintained by fitting the pipe into a predetermined location.

In the first aspect, since the notch is provided in the maintenance pipe, the notch portion can be easily opened and the maintenance pipe can be attached. Therefore, it is not necessary to cut the ground wire, remove the ground wire from the existing synthetic resin tube, and insert it into a new maintenance tube. Further, since the outer diameter and the inner diameter are the same, the maintenance pipe can be held at a desired place simply by fitting the synthetic pipe into the synthetic resin pipe, so that only necessary places can be easily maintained in a short time.
In addition, even when existing synthetic resin pipes are slightly deformed and do not match the shape of the maintenance pipe, the cuts in the maintenance pipe are provided obliquely with respect to the radial direction. The effect can be enhanced.

  According to a second aspect of the present invention, in the maintenance method for the existing synthetic resin pipe described in the first aspect, the predetermined portion is an additional portion of the upper portion of the synthetic resin tube, and a length obtained by adding an overlap portion to the additional length. The existing synthetic resin pipe is maintained by fitting the maintenance pipe into the upper part of the existing synthetic resin pipe.

  In such a second aspect, the ground height deficiency can be easily compensated without replacing the synthetic resin pipe by adding a maintenance pipe to the upper part of the existing synthetic resin pipe.

  According to a third aspect of the present invention, in the maintenance method for an existing synthetic resin pipe according to the second aspect, an existing synthetic resin pipe is used by using a maintenance pipe whose length of the overlapping portion is one-fifth or more of the added length. The present invention resides in a maintenance method for an existing synthetic resin pipe characterized by performing maintenance on the resin pipe.

  In such a third aspect, a sufficient contact area between the maintenance pipe and the existing synthetic resin pipe is obtained by having an overlapping portion with the existing synthetic resin pipe that occupies one-fifth or more of the extension length of the maintenance pipe. Therefore, the maintenance pipe can be reliably installed on the existing synthetic resin pipe.

  According to a fourth aspect of the present invention, in the maintenance method for an existing synthetic resin pipe according to the second or third aspect, the existing synthetic resin pipe is used by using a maintenance pipe having an extension portion whose surface facing the utility pole is flat. The existing synthetic resin pipe maintenance method is characterized in that maintenance is performed.

  In the fourth aspect, since a maintenance pipe having an extension portion whose surface facing the utility pole is flat is used, it is possible to cope with an existing synthetic resin pipe that is deformed from a circle to an ellipse, and It becomes possible to install the maintenance pipe in a state where it is easier to follow the power pole.

  According to a fifth aspect of the present invention, in the maintenance method for an existing synthetic resin pipe described in the first aspect, the predetermined portion is a damaged portion, and the damaged portion is covered with the maintenance pipe, thereby There is a maintenance method for an existing synthetic resin pipe characterized by performing maintenance.

  In the fifth aspect, only the damaged portion can be repaired partially by using the maintenance tube without replacing the damaged existing synthetic resin tube.

According to a sixth aspect of the present invention, in the maintenance method for an existing synthetic resin pipe according to any one of the first to fifth aspects, the maintenance is provided with fractured portions in which broken line-like cuts are provided in the circumferential direction at a plurality of locations. An existing synthetic resin pipe maintenance method is characterized in that a pipe group is broken at a broken portion to form a maintenance pipe, and the existing synthetic resin pipe is maintained using the broken maintenance pipe.

In the sixth aspect, the maintenance pipe can be easily cut to a required length during maintenance, so that the maintenance pipe can be used without waste.

A seventh aspect of the present invention is a maintenance method of an existing synthetic resin pipe according to a sixth one of aspects, and characterized by performing the maintenance of the existing synthetic resin tube with a maintenance tube comprising a resin It is in the maintenance method of existing synthetic resin pipes.

In the seventh aspect, the existing synthetic resin pipe can be maintained using a maintenance pipe made of a resin that is inexpensive, easily available, and easy to handle.

An eighth aspect of the present invention is a maintenance method of an existing synthetic resin tube according to a seventh aspect, the existing synthetic resins, characterized in that for maintenance of existing synthetic resin tube with a maintenance tube comprising a vinyl chloride It is in the maintenance method of the pipe.

In the eighth aspect, maintenance of an existing synthetic resin pipe can be performed using a maintenance pipe made of vinyl chloride that is inexpensive, easily available, and easy to handle.

According to a ninth aspect of the present invention, in the maintenance method for an existing synthetic resin pipe according to any one of the first to eighth aspects, the existing synthetic resin pipe is maintained using a maintenance pipe having the same color as the existing synthetic resin pipe. There is a maintenance method for existing synthetic resin pipes.

In the ninth aspect, by repairing or adding using a maintenance pipe of the same color as that of the existing synthetic resin pipe, the maintenance of the existing synthetic resin pipe can be performed without visually conspicuous without causing the maintenance pipe to stand out. It can be carried out.

A tenth aspect of the present invention is a maintenance method of an existing synthetic resin tube, and fixed by the maintenance tube adhesive or stainless steel band maintenance of existing synthetic resin pipe performed according to a ninth one of embodiments There is a maintenance method for existing synthetic resin pipes.

In the tenth aspect, the maintenance pipe can be reliably installed with the existing synthetic resin pipe by fixing the maintenance pipe with an adhesive or a stainless steel band.

  According to the present invention, when an existing synthetic resin pipe used to protect a grounding wire installed near a utility pole is damaged or when the ground clearance is insufficient, the inner diameter and flexibility of the existing synthetic resin pipe are approximately the same. The maintenance pipes with cuts in the length direction are used, and repairs or additions are performed by fitting them only in the desired locations, so parts can be easily and quickly replaced without replacing existing synthetic resin pipes. Maintenance can be performed.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  Fig. 1 is a side view of a grounding wire installed near a power pole and protected by a synthetic resin pipe, Fig. 2 is a side view of an existing synthetic resin pipe and maintenance pipe that require maintenance, and Fig. 3 is a maintenance pipe installed on an existing synthetic resin pipe. FIG. 4 is a side view of a maintenance pipe having a circular cross section, FIG. 5 is a schematic view of a maintenance pipe having an elliptical cross section, and FIG. Fig. 2 shows a schematic diagram of a maintenance pipe group provided with broken portions in which broken line-like cuts are provided in a circumferential direction at a plurality of locations.

  As shown in FIG. 1, the ground wire 1 is installed in the vicinity of the utility pole 2. The grounding wire 1 in this embodiment needs to be protected from a synthetic resin pipe 3 having a thickness of 2 mm or more from 75 cm below the ground to 2 m above the ground.

  As shown in FIG. 2, the synthetic resin pipe 3 that protects the grounding wire 1 is damaged, or the ground surface rises by embedding by construction, etc., and the ground height of the existing synthetic resin pipe 3 becomes relatively low, When the ground clearance is insufficient, maintenance such as repair or addition is required. Therefore, the maintenance pipe 10 is applied to repair or addition of the existing synthetic resin pipe 3. The maintenance pipe 10 has an inner diameter and flexibility that are approximately the same diameter as the existing synthetic resin pipe 3, and is provided with cuts 11 that extend from the outer diameter in the radial direction to the inner diameter and to both ends in the length direction. Since the maintenance pipe 10 is flexible, the notch 11 of the maintenance pipe 10 is widened, the maintenance pipe 10 is arranged on the ground wire 1, and the maintenance pipe 10 is installed on the ground wire 1 simply by returning the widened notch 11 to its original position. can do. Therefore, it is not necessary to perform troublesome work such as cutting the grounding wire 1 side, reinserting it into the synthetic resin tube 3 and replacing it, and maintenance work can be easily performed in a short time. The maintenance pipe 10, such as vinyl chloride or other resin, is not easily broken even if the notch 11 is expanded wider than the ground wire 1, and can be easily obtained at a low cost. The material it has is used. By covering the damaged portion of the existing synthetic resin tube 3 with the maintenance tube 10, it is possible to protect the ground wire 1 exposed at the damaged portion 5. In addition, in the existing synthetic resin pipe 3 whose ground height is insufficient due to the rise of the ground surface 4 due to construction, the maintenance pipe 10 is covered with the existing synthetic resin pipe 3 so that the upper part of the synthetic resin pipe 3 and the maintenance pipe 10 overlap. Thus, it is possible to compensate the ground clearance which is insufficient by the maintenance pipe 10 and protect the ground wire 1 while maintaining the ground height of 2 m. The overlapping portion of the synthetic resin pipe 3 and the maintenance pipe 10 is used as an addition portion 12, and the length of the addition portion 12 is preferably one fifth of the ground height deficiency.

  As shown in FIG. 3, maintenance work using the maintenance pipe 10 is performed, and the ground wire 1 is protected again. In the present embodiment, in order to securely fix the maintenance pipe 10, the maintenance pipe 10 is brought into close contact with the damaged portion 5 of the existing synthetic resin pipe 3 and the exposed portion of the grounding wire 1 using an adhesive, and is added to the extension portion. The maintenance pipe 10 is bundled together with the utility pole 2 using a stainless steel band 8. The position where the stainless steel band 8 is used is not particularly limited. Further, when it is not necessary to secure the maintenance tube 10 more reliably, the stainless steel band 8 and the adhesive need not be used.

  Details of the maintenance pipe will be described with reference to FIGS. 4A and 5A are cross-sectional views in the radial direction of the maintenance pipe. 4 (b) and 5 (b) are perspective views of the maintenance tube. FIG. 4C is a perspective view in a state where the cut of the maintenance pipe is widened. FIG. 6 is a schematic view of a maintenance pipe provided with broken portions where broken line-like cuts are provided in the circumferential direction at a plurality of locations.

  As described above, the maintenance tube 10 has an inner diameter and flexibility that are substantially the same as those of the existing synthetic resin tube 3, and is provided with cuts 11 that extend from the outer diameter in the radial direction to the inner diameter and to both ends in the length direction. In the maintenance pipe 10 in this embodiment, the cut is inclined at the thick portion with respect to the radial direction. As a result, even when the existing synthetic resin pipe 3 is slightly deformed and does not match the shape of the maintenance pipe 10, the notch 11 of the maintenance pipe 10 is provided obliquely with respect to the radial direction, so that a gap is created in the cut portion after installation. It is difficult to increase the protective effect.

  Since the cross section of the existing synthetic resin pipe 3 is usually circular, a maintenance pipe having a circular cross section as shown in FIG. 4 is mainly used. However, the grounding wire 1 and the existing synthetic resin tube 3 may be crushed by an external impact. Even when the existing synthetic resin pipe 3 is crushed, it is difficult to form a gap between the cut edges 11 by the oblique cuts 11 provided in the maintenance pipe 10. In the case of protection, a maintenance tube 20 having an elliptical cross section is used as shown in FIG. For the existing synthetic resin tube 3 crushed, the maintenance tube 20 having an elliptical cross section can be fitted into the existing synthetic resin tube 3 with a larger contact area than the maintenance tube having a circular cross section. In addition, it is possible to reduce the gap between the cut portions. In addition, the maintenance pipe 20 having an elliptical cross section can be easily fixed along the power pole 2 because the shape is easy to follow along the power pole 2 when the stainless steel band 8 is used.

  FIG. 6 shows a maintenance tube group 30 provided with broken portions 32 in which broken line-like cuts are provided in the circumferential direction at a plurality of locations. By folding the fractured portion 32 provided in the maintenance tube group 30 to the length necessary for maintenance at the maintenance work site, the maintenance tube can be easily separated into the required length and used. Therefore, the maintenance pipe can be used without waste.

  The color of the maintenance pipe and the maintenance pipe group 30 is not particularly limited, but the same color as that of the existing synthetic resin pipe 3 or the utility pole 2 is desirable. Since the maintenance pipe and the maintenance pipe group 30 are the same color as the existing synthetic resin pipe 3 or the utility pole 2, the maintenance of the existing synthetic resin pipe 3 can be performed without making the maintenance pipe only noticeable and visually uncomfortable. it can.

It is a side view of the ground wire installed near the utility pole and protected by a synthetic resin pipe. It is a side view of an existing synthetic resin pipe requiring maintenance and a maintenance pipe. It is a side view of the state which installed the maintenance pipe in the existing synthetic resin pipe, and repaired and added the existing synthetic resin pipe. It is a schematic diagram of the maintenance pipe whose section is circular. It is a schematic diagram of the maintenance pipe whose section is elliptical. It is a schematic diagram of the maintenance pipe group provided with the fracture | rupture part by which the cut of the broken line shape was provided in the circumferential direction in the several places.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grounding wire 2 Utility pole 3 Synthetic resin pipe 4 Ground surface 5 Damaged part 6 Old ground surface 7 Ground height deficit part 8 Stainless steel band 10, 20 Maintenance pipe 11, 21, 31 Cut 12 Extension part 30 Maintenance pipe group 32 Breaking part

Claims (10)

In contrast to existing synthetic resin pipes used for protection of grounding wires installed in the vicinity of utility poles, this is a cut formed in the length direction having an inner diameter and flexibility substantially the same as existing synthetic resin pipes. An existing synthetic resin pipe is fitted into a predetermined portion with a maintenance pipe formed with a notch in which one of the thick portions is inclined from the outer peripheral side to the inner peripheral side and the other is inclined to the opposite side with respect to the radial direction. A maintenance method for existing synthetic resin pipes, characterized in that maintenance is performed.   2. The maintenance method for an existing synthetic resin pipe according to claim 1, wherein the predetermined portion is an additional portion of the upper portion of the synthetic resin tube, and a maintenance pipe having a length obtained by adding an overlapping portion to the additional length is added to the existing synthetic resin tube. A method for maintaining an existing synthetic resin pipe, wherein the existing synthetic resin pipe is maintained by being fitted into the upper part.   3. The maintenance method for an existing synthetic resin pipe according to claim 2, wherein maintenance of the existing synthetic resin pipe is performed using a maintenance pipe in which the length of the overlapping portion is one-fifth or more of the added length. How to maintain existing synthetic resin pipes.   The existing synthetic resin pipe maintenance method according to claim 2 or 3, wherein maintenance of the existing synthetic resin pipe is performed using a maintenance pipe having an extension portion whose surface facing the utility pole is flat. Maintenance method for synthetic resin pipes.   2. The existing synthetic resin pipe maintenance method according to claim 1, wherein the predetermined part is a damaged part, and the existing synthetic resin pipe is maintained by covering the damaged part with the maintenance pipe. Maintenance method of resin pipe. In the maintenance method of the existing synthetic resin pipe in any one of Claims 1-5 , the maintenance pipe group provided with the fracture | rupture part by which the broken-line-like cut was provided in the circumferential direction in multiple places was fractured | ruptured by the fracture | rupture part. and maintenance tube, the method of maintenance existing synthetic resin tube, characterized in that for maintenance of existing synthetic resin tube with the broken maintenance tube. In the maintenance process of the existing plastic pipe according to any one of claims 1 to 6, the method of maintenance existing synthetic resin tube, characterized in that for maintenance of existing synthetic resin tube with a maintenance tube made of a resin. 8. A maintenance method for an existing synthetic resin pipe according to claim 7 , wherein maintenance of the existing synthetic resin pipe is performed using a maintenance pipe made of vinyl chloride. In the maintenance process of the existing synthetic resin tube according to claim 1, the existing synthetic resin tube, characterized in that for maintenance of existing synthetic resin tube using existing synthetic resin tube of the same color as the maintenance tube Maintenance method. In the maintenance process of the existing plastic pipe according to any one of claims 1 to 9, existing plastic tube, characterized in that for maintenance of existing synthetic resin pipe was fixed by the maintenance tube adhesive or stainless steel band Maintenance method.

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