JPS6132604B2 - - Google Patents

Description

[Detailed description of the invention] About purpose and scope.

The present invention relates to measuring lengths for long wires, and is used, for example, when it is necessary to accurately measure and cut ACSR in order to make electric wires used in prefabricated installation of overhead power transmission lines.

This invention was developed with the main purpose of measuring ACSR at a low cost and using relatively simple equipment.

However, the present invention can also be applied to concentric bare electric wires other than ACSR, electric wires and cables with a sheath provided thereon, and other long wire materials (for example, wire ropes).

About the background of this invention.

ACSR will be mainly discussed below, and other long wires will be discussed at the end.

Conventionally, long wire rods were measured after the long wire rods were completed. As is well known, there are two main types of measuring scales: the measuring foil type and the measuring scale type. However, in the case of ACSR, the surface is uneven, so the measuring foil method cannot be used accurately. In addition, in order to perform the shakutari ceremony, a large tension must be applied to pull the material, which requires large-scale equipment. Furthermore, even if the length is measured magnetically using a steel core, the accuracy will be degraded due to the presence of the aluminum layer.

Summary of this invention.

First, make a very thin mark on the center wire by magnetizing it for a measuring tape. Here, marking for a measuring scale by magnetization refers to applying magnetism to the position on the center wire to be marked, and extremely thin marking for a measuring scale means marking with ink or the like. Thereafter, a line layer is provided thereon to form a conductor. Then, measure using the mark on the center wire as a reference. Note that the number of center wires is not limited to one. Also, measuring using the mark on the center wire as a reference means transferring the mark to the surface of the long wire and marking it, or using a magnetic method, for example, to measure the mark on the center wire without making a mark on the surface. This includes detecting and immediately cutting based on this.

Since the structure is such that a wire layer is provided around the center wire, the spacing between marks made on the center wire remains unchanged even after the process. Furthermore, since the center wire is thin, the tension applied to it during measurement can be small.

Description of Examples.

This is ACSR, which has a steel core made of seven steel wires.
This is the case. The method can be roughly divided into three steps:

(1) Attach a measuring mark to one center wire.

(2) Twist six steel wires on top of that, and transfer the mark on the center layer (center line) to the surface of the steel core.

(3) Twist the aluminum wire on top of it and transfer the mark on the steel core to the surface of the ACSR.

The explanation will be given below in this order.

(1) Measuring scale for the center layer This is a known measuring method using magnetism, and 10 in Fig. 1 is a single steel wire that constitutes the central layer. 12 is a delivery bobbin, 14 is a capstan on the delivery side, and 16 is a brake thereof.
18 is a capstan on the winding side, and 20 is a motor, which cooperate with the capstan 14 to apply tension to the steel wire 10. Since the steel wire 10 is thin, the capstans 14 and 18 can be made simply by wrapping the steel wire 10 around it several times. Moreover, a cap stan 14 may be replaced with a cap stan 14 here.

24 is a magnetizer, 26 is a detector, and the distance L between them serves as a measuring standard. 28 is a counter, 3
0 is a control circuit. Further, 32 is an auxiliary scale, and 34 is an auxiliary measuring means such as a measuring foil type.

Describe the effect.

The steel wire 10 that has been demagnetized and confirmed to be demagnetized is run in the direction of the arrow. Then, it is magnetized with a magnetizer 24,
It is detected by the detector 26 and counted by the counter 28, and at the same time, the control circuit 30 controls the magnetizer 24.
make it work. Stop running the steel wire 10 at an integer multiple of L that is closest to the desired length of the gauge (for example, when the length of the gauge is 351 m and L is 10 m and the length reaches 350 m), and 1 m) is measured using the auxiliary scale 32, and a mark A is made on the steel wire 10 using, for example, ink (see FIG. 2).

Several marks A are made on the steel wire 10 by repeating the same process.

(2) Twisting of the steel core 13 The process itself is well known. It is schematically shown in Figure 2.

11 is six steel wires, 13 is a twisted steel core, 3
6 is more mouthful. Further, 37 and 39 are optical mark detectors, and 38 is a marker that makes a mark by spraying ink or the like. Of these, the detector 37 is provided slightly in front of the drawer opening 36 (on the left in the figure), and the marker 38 and the detector 39 are provided after the drawer opening 36. Also, the distance between the detector 37 and the marker 38,
The distance between the marker 38 and the detector 39 is made exactly equal (however, the length is arbitrary). 40 again
is a magnetizer provided so as to be movable along the steel core 13.

While twisting the steel wires 11, when the mark A made in (1) above comes just before the detector 37,
The marker 38 operates to place a mark B on the steel core 13 (FIG. 2). When the steel core 13 moves and the mark B comes in front of the detector 39, the marker 38 operates again to place a mark A' on the steel core 13 (FIG. 3). This means that A' has been moved to the position directly above A. At this point, stop the machine.

Next, manually bring the magnetizer 40 onto the mark A' and strongly magnetize it.

(3) Twisting the aluminum wires 15 This twisting process is also known. It is schematically shown in Figure 4.

15 is an aluminum wire, 17 is an ACSR, 42 is a strand, and 44 is a magnetic detector.

Once it is determined that the position of the strong magnetic mark A' has passed through the opening 42 using a suitable magnetic detector or auxiliary measuring means (not shown),
Stop the machine. Then, the detector 44 is manually moved to detect the position A' and marked on the surface of the ACSR 17 with, for example, ink. This is the mark we are looking for.

Regarding methods other than the above embodiments.

(1) As a measuring method for the central steel wire 10, other known methods such as a measuring foil method or an optical measuring method can be used.

In addition, regarding the transfer of the mark, please refer to the mark A.
When it comes near the spout 36, stop the machine, use a length measuring device such as a path to make a temporary mark B on the surface of the steel core 13 (the distance between AB is arbitrary),
Next, operate the machine a little and mark A is 36 mm.
Alternatively, the steel core 13 may be stopped again after passing through, and a mark A' (so that AB=A'B) is marked on the surface of the steel core 13 using a bus or the like. Furthermore, as a method of indirectly transferring the mark without looking at it, it is also possible to use a method other than magnetism, such as radiation.

Regarding electric wires other than ACSR.

(1) In the case of copper and aluminum wires This invention can be utilized by using a gauge and transfer method other than magnetic. In particular, when there is only one center wire, high accuracy can be expected even if a foil type gauge is used because the surface is flat and the contact is good.

If there are a plurality of center wires, the advantage of using the present invention is greatly reduced, but the advantage remains that the tension device for measuring the wires is simpler since they are thinner than the finished wires.

(2) The present invention can also be applied to electric wires in which an insulating coating is applied to concentrically twisted conductors, and long wires such as wire ropes in which a wire layer is provided around the center wire.

Effects of this invention: Since a measurement mark is attached to the center wire and the measurement is made based on this mark, the constant tension device used to attach the measurement mark is simpler and less expensive compared to the finished long wire. .

Furthermore, by attaching a measuring mark only to the center wire, the steel wires that are subsequently twisted onto the center wire do not take into account the influence of length, making the subsequent twisting process easier.

In other words, it becomes easier to consider the effects of temperature and the tension of the bobbin around which the steel wire is wound.

[Brief explanation of the drawing]

1, 2, 3, and 4 are explanatory diagrams showing an example of the method of the present invention in the order of steps. 10 and 11: Steel wire, 13: Steel core, 15: Aluminum wire, 17: ACSR, A, A', B: Mark.

Claims (1)

[Scope of Claims] 1. When measuring a long wire consisting of a wire layer around the center wire, first, the center wire is magnetized or an extremely thin measuring mark is attached, and then the stranded wire is A method for measuring a long wire, comprising forming a long wire by providing layers, and measuring by moving the mark onto the long wire at a position directly above the mark, using the mark as a reference.