JPS63202211A - Cable type installing method of opgw - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method of extending a power transmission line, and particularly relates to a method of extending an optical fiber composite overhead ground wire (OPGW).

(Prior art) Conventionally, in the extension of power transmission lines, the roller of one Shinto gate of a gold wheel having two TM insertion ports is suspended from the support wire between the steel towers, and a plurality of rollers are connected at regular intervals with connecting ropes. By sequentially supporting the new wire on the other roller of the metal wheel and towing it from one side with a self-propelled machine or pulling rope, and after reaching the other side, tightening the new wire and simultaneously relaxing the support wire. There was a reversal method in which the vertical position was reversed and the broken support wire was removed, and a pull-out method, in other words, a method in which a new wire was connected to the end of the support wire supported on a metal wheel and the wire was extended while being pulled out. .

(Problems to be Solved by the Invention) However, considering the characteristics of OPGW, the above-mentioned construction method has many problems. In other words, in the reversal construction method, the construction section is most preferably between one steel tower, and therefore, the 0PGW also needs to be cut for each span, which may reduce the transmission ability of the optical fiber.

In addition, the drawing method has many disadvantages, such as sagging wires in the spans and sliding contact with metal wheels, because the OPGW often comes into contact with the safe.

(Means for solving the problem) Therefore, in the present invention, the OPGW can be performed over multiple spans at once.
In order to extend the line and not cause various injuries, support the tower support point of the support line with special support metal fittings, and install OPG at the lower position.
By placing a group of carriers holding W on the support line, passing through the support metal fittings, and deploying it into the wire span, it is possible to extend the wire without causing damage to the OPGW.

In addition, in the present invention, the supporting line and the OPGW which is the conveying line are
Since there is no need to change the lower position of the OPGW, that is, to reverse it, excessive tension is not applied to the OPGW, and the possibility of injury to it is extremely reduced.

(Materials and Functions) Therefore, in order to enable the wire extension method of the present invention, supporting metal fittings for supporting wires having mutually related structures and a carrier for holding and transporting 0PGW that can freely pass through the metal fittings are required. First, the supporting metal fittings H of the support line are two approximately U-shaped U main metal fittings 1,
Their U-shaped surfaces face each other, and their upper ends are connected in series in the horizontal direction at predetermined intervals with connecting members 11.
The support portion 2 is constructed by protruding in both directions and bridging the support wire supports 14 which are each fixed with a shaft. A steel tower attachment part 15 is provided above the support part, and one of the connecting members 11 is connected to its hinge part 16, and the other is connected to the opening/closing part 17, so that the support part 2 can be opened and closed freely. . At the lower position of the support part 2, there are guide rails 31 provided substantially parallel to each other at a predetermined interval on both sides of the lower position of the support line supporter 14, and the guide rails 31 are connected to each other, and the connecting rope receiver is connected to a roller 32. A connecting shaft 33 having a diameter is provided between both rails 31 so as to be freely openable and closable, thereby configuring the carrier guide section 3. The carrier B has a predetermined number of fitting grooves 41 which are opened radially from the vicinity of the center of the circle toward the circumference, and a predetermined number of fitting grooves 41 are provided concentrically at the edges on each side 42 sandwiched by the fitting grooves 41. 2 with the holding parts 43 facing each other and maintaining a predetermined interval
Between the two rotary plates 4, there are two guide bodies 5 provided on both sides with sliding flanges 51 in an arc shape corresponding to each sliding retainer 11r43 and long enough to engage at least two of the sides at the same time. The movable collar 51 is freely inserted into the sliding holding portion 43 and held. One of the guide bodies 5 is for mounting on the support IIK, and has rollers 52 at both ends. The other one is for hanging the 4-sided roller A for holding 0PGW, and the rope coming out from the bottom is connected to the cross-shaped 4-sided roller A made of a frame that can be opened and closed. The center of the two rotary plates 4, which sandwich two guide bodies 5 between them, is axially loaded together with the connecting rope holder 44 arranged between the rotary plates 4, and both rotary plates 4
A guide roller 45 for sliding the guide rail 31 of the support line support fitting H is provided at the more protruding shaft end.

A framework 7 of four-sided rollers A is connected to the guide body 50 - roller 52 for mounting the support line of this carrier B on the support line K, and is connected to the other lower guide body 5 via a rope 6 of a predetermined length. Holding the OPGW inside, insert the U main fitting 1 of the support wire support fitting H into the insertion groove of the rotary plate 4 of the carrier B, and further insert the connecting rope R supported on the roller 32 into the connecting rope holder. By being pulled, the carrier B moves, that is, the rotary plate 4 rotates, and advances in a manner that pushes the U main metal fitting 1 out of the insertion groove 41.
The connecting shaft 33 connecting the guide rails 31 similarly passes through and escapes from the support fitting H, and during this time the guide rollers 45 of the carrier B move on the guide rails 31 of the support fitting H.

(Example) The above-mentioned main equipment will be used to extend the line, and the lead will be supported by metal wheels C placed on the arms of each tower T from a drum field installed on the base of the tower at one end of the planned span. After extending the chamber M and lowering it to the engine station provided under the steel tower at the other end, a connecting rope R and a support line K are connected to the rear end of the leading chamber M via a yoke. By winding up the leading chamber M at the engine station, both lines are extended in the extension span, and the tower metal wheel C, which is the tower support point, is replaced with the above-mentioned supporting metal fitting H and resupported. To support both lines before they are supported by the support fitting H, the support wire is passed through the metal wheel C used when extending the leading rope M, and the connecting rope R is passed through another metal wheel C installed nearby. Connect the connecting rope R1 to the rear end of the connecting rope R via the yoke again on the drum field side to the support line that is ready with the support line being 0 or more.
and OPGW are connected. The tip of the OPGW is used to grasp the joint box connection bone after it reaches the terminal tower. The carrier B is mounted on the support line K, fixed to the connecting rope R at the lower position at a predetermined interval, the OPGW is held within the four-sided roller A, and the OPGW is moved to the steel tower T as the connecting rope R is wound up at the engine station side. It goes up to the supporting metal fitting H. When the first carrier B reaches the supporting metal fitting H on the support line, it passes through the supporting metal fitting H by the action described above, and subsequently passes through the supporting points of each steel tower 'r in the same manner until reaching the final steel tower.
The OPGW is transported and stretched between the wire spans. Also, among the carriers B fastened to the connecting rope R, the first one and the second
The second type is a carrier B in which the four-sided roller A is not suspended at the bottom, and is positioned across the yoke. This is a configuration for passing the support fitting H over a yoke that does not have a passing structure. In other words, the first carrier B passes through the support fittings, and the O
When the yoke with the PGW grip approaches, the support bracket H
The connecting rope receiver opens the connecting shaft 33 of the roller 32, takes the connecting rope R between both carriers B out of the support fitting H, passes through the yoke part, and then inserts the connecting rope R into the receiver again and closes it. , the second carrier B is allowed to pass through in a closed state. The same procedure is applied to the supporting metal fittings H of each steel tower T.

After the wire extension is completed, the OPGW is temporarily raised at each steel tower T, and with the row 16 that connects the guide body 5 at the bottom of the carrier B and the four-sided roller A loosened, the connecting rope is wound up from the drum field. Collect 8 groups of carriers to the field. This carrier 8
When collecting the group, the four-sided roller A is removed and collected from the 0PGW by a worker on each steel tower T in front of the support fitting H. When the group of carriers is retreated to the drum field side and collection is completed, the support wires are transferred from the support metal fittings to the metal wheels at each steel tower, and the wires are sequentially replaced with smaller diameter wires for collection. The remaining 0PGW will be tied to the towers at both ends of the span, and the construction will be completed by tightening the wires at each tower and lowering both ends to the tower's joint box.

(Effects of the Invention) As described above, by extending OPGW lines using the construction method of the present invention, it is possible to extend lines across multiple spans at once, and there is no need to pass through safes, etc. during construction, and there is no need to apply excessive tension. 0PGW is less likely to be damaged and can maintain the designed capacity. Further, even after the wire is stretched into the wire span by the carrier, the vertical position relative to the support line is not reversed, thereby further promoting the effect.

[Brief explanation of the drawing]

Figure 1 shows the procedure for this method. Figure 2 is a front view of the support fitting. Figure 3 is its right side view. Figure 4 is a front view of the carrier. Figure 5 is its right side view. FIG. 6 is a front view of the four-sided roller. Figure 7 is its right side view, and Figure 8 is its front view in use. Symbol A in the diagram: Four-sided roller R: Connecting rope B...
Carrier ]゛... Steel tower C... Gold Car W... Wire H... Support metal fittings 0 PGW... Optical fiber K... Support wire Composite overhead ground wire M... Leading room 1... U Umetal fittings 16...Hinge part 11...
Connection member 17...Opening/closing part 12...Roller 2...Support part 13...Roller side plate
3...Carrier guide part 14...Support line supporter 31
... Guide rail 15 ... Steel tower attachment part 32.
・Connection rope holder is port 33 ・Connection shaft
- Roller 4... Rotating plate 45... Guide roller 41... Fitting groove 42... Side 5.
... Guide body 51 ... Sliding collar 43 ... Sliding holding part 52 ... Roller 44 ... Connecting rope holder 7 ... Frame 6 ... Rope

Claims (1)

[Claims] The lead cable will be extended from the drum field on the base of the steel tower at one end of the planned span, supported by metal wheels placed on each tower, and lowered to the engine field under the tower at the other end, then connected to the rear end of the lead cable. A supporting metal fitting that connects the rope and support line and winds up the lead cable to bring both lines to the engine station, allowing the carriers described later to pass through the steel wheels of each tower while supporting both lines in a closed state. It is mounted on a support line from the drum field on the ground, connected to connecting ropes at specified intervals, and placed in a roller framework of four-sided rollers that can be opened and closed via a specified length of rope at the bottom.
The carrier holding the GW is moved through the supporting metal fittings of each tower by winding the connecting rope, and after the OPGW is transported over the entire length of the extension span, tension is applied to the OPGW to temporarily raise it, and The carrier is moved by releasing the support from the rollers and winding up the connecting rope at the drum station, and releases the four-sided rollers of the carriers that arrive one after another on each steel tower to perform the OPG.
An OPGW cableway-type line extension method characterized by tightening the OPGW and recovering the support line after untying the W and removing the group of carriers.