JPS64882B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement in a method of drawing a multi-conductor power transmission line under low tension using a hanging wheel.

[Prior Art] As shown in FIG. 10, an overhead power transmission line is extended using a hanging wheel 60 that connects an upper sheave 61 and a lower sheave 62 with a connecting rod 63 and has a spacing wire attachment part 64. This method (so-called hanging metal method) has been known for a long time, but it requires a step of inverting the hanging wheel 60 in order to turn the main rope wire R ₁ upside down and the electric wire W ₁ in the middle of the wire extension. Ta. The sling method allows for low-tension wire extension, and in today's world where power transmission lines are becoming larger in size, it is considered a very simple construction method. Since it requires skill, it has been a major factor hindering its widespread use.

Therefore, the applicant previously proposed a non-reversible hanging wheel construction method that solved this bottleneck by using a non-reversing hanging wheel as shown in FIG. 4, for example.
(For example, Japanese Patent Publication No. 57-50402) The non-reversible hanging wheel 30 according to the existing proposal has a wire between the upper sheaves 31, 33 and the lower sheaves 32, 34.
Space 36, 36 in which R ₁ and W ₁ can move freely
By simply adding or releasing tension to the filaments R ₁ and W ₁ , the filament R ₁
and _W1 can be freely changed up and down as indicated by the arrows in FIG. 4, making the work of reversing the hanging wheel unnecessary.

Before explaining the present invention, a method for extending a multi-conductor power transmission line using the above-mentioned hanging wheel will be explained first.

First, the main rope wire 20 is used to deploy a gold wheel between the overhead wire towers,
will be handed over. The main rope wire 20 is separately stretched by hand or by helicopter.
It has been handed over in advance.

Figure 5 shows the main rope wire 2 delivered in this way.
Deploy gold wheels 30, 30... on top of 0, and at the same time expand gold wheels 3
0, 30... shows how the pull wire 40 is extended.

The metal wheels 30, 30... have spacing wires 37, 37 connected to the spacing wire attachment portion 35 shown in FIG.
The main cable wire 20 is placed on the line _R1 of one frame, and the pulling wire 40 is placed on the line _W1 of the lower sheave 36 of the other frame, and the hanging wheels 30, 30 are pulled by the carrier 41. Be expanded.

FIG. 6 shows a state in which the pull wire 40 is extended onto the main rope wire 20 via the metal wheels 30, 30, . . . in this manner. The figure on the right side of Figure 6 shows the gold wheel 30.
This diagram schematically shows the arrangement relationship between the main cable wire 20 and the pull wire 40 within the main cable.

Next, an electric wire 50 is connected to the end of the pull wire 40, and the pull wire 40 is replaced with the electric wire 50 as shown in FIG.

The figure on the right side of FIG. 7 shows how the main rope wire 20 and the electric wire 50 are arranged in the metal wheel 30 in this manner.

Next, from the state shown in FIG. 7, the electric wire 50 is temporarily raised and the tension on the main rope wire 20 is loosened. Then, as shown by the arrow in FIG. 4, the electric wire 50 moves toward the upper sheave 33, and the main rope wire 20 moves toward the lower sheave 32, so that the electric wire 50 functions as the main rope wire. It takes shape. In this state, next, as shown in FIG. 8, another electric wire 50' is connected to the end of the main rope wire 20 to replace the main rope wire 20.

In this state, the electric wires 50, 50' are arranged on the metal wheel 30 as shown in the right side of FIG.

Next, the electric wire 50' side is also temporarily raised, and the upper sheave side is moved. In this way, within the metal wheel 30, all the electric wires 50 and 50' are moved to the upper sheave as shown in the right side diagram of FIG.
In this state, if the spacing wire 31 is pulled in the direction of the opposite arrow as shown in FIG.
0, 30... are collected one after another. In addition, 2
0' and 37' are the main rope wire and the rope for deploying the metal wheel, which will be used for the next wire extension, and will be attached to the end of the metal wheel, which will be recovered if necessary.

[Problems to be Solved by the Invention] As described above, a two-conductor power transmission line has been extended, but a four-conductor or six-conductor transmission line cannot be extended using this hanging wheel. With the ultra-high voltage of power transmission lines in recent years, the number of conductors in power transmission lines is becoming more common: 4 or 6 conductors, and it is important to adopt the non-reversing hanging method for running such multi-conductor transmission lines. The demand for this is steadily increasing.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned circumstances, and provides a non-reversible hanger that enables the extension of a 4-conductor or 6-conductor power transmission line in one step. The purpose of the present invention is to provide a vehicle and a wire extension method using the same, and its gist is as follows: (1) A space is formed between an upper sheave 1 and a lower sheave 2 in which the wire can move. an upper sheave 4; an upper sheave 4; Lower sheave 5 and gap 6a
A hanging wheel for power transmission line extension, which is constructed in combination with a second frame having an intermediate sheave 6 arranged in the same manner as described above.

(2) In the middle of the space of the frame formed between the upper sheave 1 and the lower sheave 2 to allow the wire to move 1, there is a gap 3a through which the following main rope wire etc. can pass, but electric wires cannot pass through. Hanging wheel 10 is a combination of a first frame including an intermediate sheave 3 and a second frame including an upper sheave 4, a lower sheave 5, and an intermediate sheave 6 having a gap 6a as described above. , 10, and (a) run the upper sheaves 1 and 4 on the stretched main rope wires a and b,
(b) Loosen the tension of the main rope wire a and connect the electric wire W ₁ and another main rope wire c to its end;
By pulling the main rope wire a, the electric wire W ₁
on the intermediate sheave 3 and the main rope wire c on the lower sheave 2, (c) Next, tension the electric wire W ₁ , loosen the main rope wire b, and connect the electric wire W ₂ and the main rope in the same manner as in (b) above. Extend wire d onto intermediate sheave 6 and lower sheave 5, (d) also tension wire W ₂ , then connect wires W ₃ and W ₄ to main rope wires c and d and lower each wire. A method for extending a multi-conductor power transmission line over sheaves 2 and 5.

(3) In the middle of the space of the frame formed between the upper sheave 1 and the lower sheave 2 to allow the wire to move 1, there is a gap 3a through which the following main rope wires, etc. can pass, but electric wires cannot pass through. Hanging wheel 10 is a combination of a first frame including an intermediate sheave 3 and a second frame including an upper sheave 4, a lower sheave 5, and an intermediate sheave 6 having a gap 6a as described above. , 10, and (a) run the upper sheaves 1 and 4 on the stretched main rope wires a and b,
(b) Loosen the tension of the main rope wire a and connect the electric wire W ₁ and another main rope wire c to its end;
By pulling the main rope wire a, the electric wire W ₁
on the intermediate sheave 3 and the main rope wire c on the lower sheave 2, (c) Next, tension the electric wire W ₁ , loosen the main rope wire b, and connect the electric wire W ₂ and the main rope in the same manner as in (b) above. Extend the wire d onto the intermediate sheave 6 and the lower sheave 5, (d) also tension the electric wire W ₂ , and then connect the electric wire W ₃ and the main rope wire e to the main rope wire c and the electric wire W to the main rope wire d. ₄ and the main rope wire f and take them out one after another, the electric wire
Place W ₃ on intermediate sheave 3, main rope wire e on lower sheave 2, and wire W ₄ on intermediate sheave 6.
(e) Connect electric wires W ₅ and W ₆ to the main rope wires e and f, respectively, and extend the main rope wires f onto the lower sheaves 5, respectively. Wayside method of multi-conductor power transmission line extending electric wires W ₅ and W ₆ .

It is in.

[Function] Since the hanging wheel according to the present invention is constructed as described above, the wire can be extended even onto the intermediate sheave. By appropriately using this intermediate sheave and incorporating a step of extending the electric wire onto this intermediate sheave, it becomes possible to extend electric wires of two or more conductors in one process.

[Examples] The present invention will be described below based on Examples. FIG. 1 is an explanatory view showing one embodiment of a hanging wheel 10 according to the present invention, in which a space 13 is formed between an upper sheave 1 and a lower sheave 2 to allow movement of the wire. In the middle of the space 13 of the first frame 11, there is arranged an intermediate sheave 3 having a gap 3a through which a main rope wire or pull wire, which will be described later, having a small diameter can pass through, but an electric wire having a larger diameter cannot pass through. Similarly, there is a gap 6a between the upper sheave 4 and the lower sheave 5 through which the electric wire cannot pass.
a second frame 1 with an intermediate sheave 6 having
2, and the first frame 11 and the second frame 12 are combined to form the hanging wheel 10. Reference numeral 7 indicates a mounting portion for the spacing wire.

Although Figure 1 does not particularly show openings for attaching or detaching electric wires or wires, a part of the frame or a part of the mounting base of the sheave may have an opening/closing structure using a hinge, for example, and the opening/closing structure can be opened and closed to attach/detach the wires. All you have to do is

Next, a case will be described in which a four-conductor power transmission line is extended using the hanging wheel 10 configured as described above.

First, two main cable wires a and b are stretched between the tower spans. The hanging wheels 10, 10 are then connected to the main rope wires a and b by spacing wires and deployed, but the deployment method is similar to that previously explained in FIGS. 5 and 6. Just do it.

FIG. 2A shows the state in which the hanging wheel 10 is spread out on the main rope wires a and b.

Next, the tension is maintained only on the main rope wire b, and the tension on the main rope wire a is loosened. Then, since the diameter of the main rope wire a is selected to allow it to pass through the gap 3a of the intermediate sheave 3, the main rope wire a passes through the gap 3a and falls onto the lower sheave 2. FIG. 2B shows such a state.

Next, the electric wire _W1 and another main rope wire (or it may be called a pull wire) c are connected to the end of the main rope wire a whose tension has been loosened,
The electric wire _W1 , whose diameter is larger than the gap 3a of the intermediate sheave 3, is placed on the intermediate sheave 3, and the main rope wire c is placed on the lower sheave 2, and by taking the main rope wire a, As shown in FIG. 2C, the electric wire _W1 and the main rope wire c are extended.

Next, tension is applied to the electric wire W ₁ (Fig. 2 D), the tension on the main rope wire b is loosened, and the electric wire W is attached to the end of the main rope wire b as in the case of the main rope wire a earlier. ₂ and the main rope wire d are connected, and by pulling the main rope wire b, the electric wire W ₂ is extended onto the intermediate sheave 6 and the main rope wire d is extended onto the lower sheave 5. Figure 2 (e) shows this state.

Then, the electric wire _W2 is stretched up, resulting in the state shown in Fig. 2. In this state, electric wires W ₃ and W ₄ are connected to the main rope wires c and d and replaced with electric wires. (Fig. 2 G) Apply a moderate tension to the electric wires W ₃ and W ₄ and keep them floating above the lower sheaves ₂ and 5 (Fig. 2 _H ). If you collect it while running it, you will later get 4 conductor wire W ₁ ,
This means that W ₂ , W ₃ and W ₄ have been extended.

Although the above description has been made regarding the extension of a four-conductor electric wire, it is also possible to extend a six-conductor electric wire using the hanging wheel according to the present invention.

The method of extending six conductors will be explained with reference to FIG.

FIG. 3A is the same as FIG. 2F, and the steps up to this point are the same as those already explained for the case of four conductors.

The difference is that the main rope wire c is connected to the electric wire W ₃ and the main rope wire e, and the electric wire W ₃ is extended onto the intermediate sheave 3 and the main rope wire e is extended onto the lower sheave 2. This is the point where the electric wire W ₄ and the main rope wire f are connected to the main rope wire d, and the electric wire W ₄ is extended onto the intermediate sheave 6 and the main rope wire f is extended onto the lower sheave 5.

FIG. 3B shows how the electric wires W ₃ and W ₄ and the main rope wires e and f are extended as described above. Finally, connect the main rope wires e and f to the electric wires W ₅ and W ₆
In exchange, the extension of six electric wires W ₁ , W ₂ , W ₃ , W ₄ , W ₅ and W ₆ is completed as shown in FIG. 3C.

[Effect of the invention] As detailed above, the hanging wheel according to the present invention has the following features:
By installing an intermediate sheave, it is now possible to extend 4-conductor and 6-conductor wires with a single deployment of the hanging wheel.In addition to meeting the demand for low-tension wires as wire sizes increase, Nowadays, the number of conductors is increasing due to ultra-high voltage, and the effectiveness of the present invention should be highly evaluated as it greatly facilitates overhead wiring work for large-sized multi-conductor power transmission lines.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of the hanging wheel according to the present invention, FIG. 2 is an explanatory diagram of the process in the case of extending a four-conductor electric wire using the hanging wheel according to the present invention, and FIG. 3 Similarly, FIG. 4 is an explanatory diagram showing an example of a hanging wheel already proposed by the applicant, and FIGS. 5 to 9 are an explanatory diagram of the hanging wheel shown in FIG. 4. FIG. 10 is an explanatory diagram of a process in which electric wires are extended using a wheel, and FIG. 10 is an explanatory diagram showing the structure of a conventional hanging wheel. 1, 4; Upper sheave, 2, 5; Lower sheave, 3,
6; Intermediate sheave, 3a, 6a; Gap, 10; Hanging wheel, a, b, c, d, e, f; Main rope wire (pulling wire), W ₁ , W ₂ , W ₃ , W ₄ , W ₅ , W ₆ ; Electric wire.

Claims (1)

[Claims] 1. A frame is formed between the upper sheave 1 and the lower sheave 2 in a space in which the filament can move. Although a small diameter main rope wire or the like can pass through the space in the middle of the space, a larger diameter main rope wire can pass through the space. A first frame includes an intermediate sheave 3 having a gap 3a through which the electric wire of the same diameter cannot pass through, and a second frame includes an upper sheave 4, a lower sheave 5, and an intermediate sheave 6 having a gap 6a similar to the above. Hanging wheel for power transmission line extension consisting of a combination with a frame. 2. An intermediate sheave having a gap 3a in the middle of the space of the frame formed between the upper sheave 1 and the lower sheave 2 to allow the wire to move 1, through which the main rope wire etc. described below can pass, but the electric wire cannot pass through. Hanging wheels 10, 10 are made up of a combination of a first frame having an upper sheave 4, a lower sheave 5, and an intermediate sheave 6 having a gap 6a similar to the above. Prepare a plurality of the main rope wires a and b, (a) extend the upper sheaves 1 and 4 while maintaining the gap between the main rope wires a and b, and (b) spread out the main rope wires a and b while keeping the gap between them. By loosening the tension, connecting the electric wire W ₁ and another main rope wire c to the ends thereof, and taking off the main rope wire a, the electric wire W ₁ is placed on the intermediate sheave 3 and the main rope wire c is placed on the lower sheave 2.
(c) Next, tension the electric wire W ₁ , loosen the main rope wire b, and extend the electric wire W ₂ and the main rope wire d onto the intermediate sheave 6 and the lower sheave 5 in the same manner as in (b) above. , (d) Also tension the electric wire W ₂ , and then the main rope wire c
A method of extending a multi-conductor power transmission line by connecting electric wires W ₃ and W ₄ to and d and extending the respective electric wires onto lower sheaves 2 and 5. 3 An intermediate sheave having a gap 3a in the middle of the space of the frame formed between the upper sheave 1 and the lower sheave 2 to allow the wire to move 1, through which the main rope wires etc. described below can pass, but the electric wires cannot pass through. Hanging wheels 10, 10 are made up of a combination of a first frame having an upper sheave 4, a lower sheave 5, and an intermediate sheave 6 having a gap 6a similar to the above. Prepare a plurality of the main rope wires a and b, (a) extend the upper sheaves 1 and 4 while maintaining the gap between the main rope wires a and b, and (b) spread out the main rope wires a and b while keeping the gap between them. By loosening the tension, connecting the electric wire W ₁ and another main rope wire c to the ends thereof, and taking off the main rope wire a, the electric wire W ₁ is placed on the intermediate sheave 3 and the main rope wire c is placed on the lower sheave 2.
(c) Next, tension the electric wire W ₁ , loosen the main rope wire b, and extend the electric wire W ₂ and the main rope wire d onto the intermediate sheave 6 and the lower sheave 5 in the same manner as in (b) above. , (d) Also tension the electric wire W ₂ , and then the main rope wire c
Connect the electric wire W ₃ and the main rope wire e to the main rope wire d, and connect the electric wire W ₄ and the main rope wire f to the main rope wire d,
By taking these wires in sequence, the electric wire W ₃ is extended onto the intermediate sheave 3, the main rope wire e is extended onto the lower sheave 2, the electric wire W ₄ is extended onto the intermediate sheave 6, and the main rope wire f is extended onto the lower sheave 5. (e) Connect electric wires _W5 and _W6 to the main rope wires e and f, respectively, and connect the electric wires _W5 and _W6 above the lower sheaves 2 and 5 to form a multi-conductor power transmission line. Ways along the line.