JP2833804B2 - Wire drawing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention [Industrial Application Field] The present invention relates to, for example, a method in which an overhead wire rope is looped from a drum site to a terminal tower by two lines, and looped, and an engine is used in the drum site. The present invention relates to a loop wire drawing device that winds an overhead wire rope and feeds out an electric wire.

[Conventional technology]

In the conventional overhead line construction, a drawing method as shown in FIG. 3 is performed. In this drawing method, the shoe chain extension wheel 1 is placed in a drum place, an overhead wire winch 2 is installed in an engine place, and an electric wire 5 is pulled out from a drum 4 by an overhead wire rope 3. In recent years, there has been a tendency to increase the work of replacing power transmission lines in suburbs or urban areas of cities, and such a drawing method has many problems such as noise pollution caused by overhead wire engines.

Conventionally, a loop drawing method as shown in FIG. 4 has been considered to solve such a problem. In this loop wire drawing method, the shoe chain 1a of the wire drawing car 1 and the overhead winch 2 are placed on a drum site, and the overhead wire wire rope 3 is passed over two lines from the drum site to an end point tower, and this is looped to form a drum site. The overhead wire engine winds up the overhead wire wire rope 3 and feeds out the electric wire 5. In this loop wire drawing method, the rotating shaft 6 of the shoe chain 1a of the drawing wheel 1 on the payout side and the rotating shaft 6 of the overhead wire winch 2 are mechanically directly connected.

Accordingly, as shown in FIG. 5, the rotational force of the shoe chain 1a based on the extension tension T1 (minus power) and the winding tension T2
The wire drawing operation can be performed only by the difference from the rotational force of the overhead wire winch 2 based on (plus power), and the power used can be reduced.

Further, unlike the case of the drawing method, since the two rotating shafts 6 are directly connected, the winding length and the feeding length are equal, the change in the sag during the drawing is small, and the control is simple.

Furthermore, there is an advantage that the drum field and the engine field can be arranged at the same place, and reliable and high-quality overhead wire construction such as securing of safety and security and measurement, management and control of extension data can be performed.

[Problems to be solved by the invention]

However, since the shoe chain 1a and the overhead wire winch 2 are mechanically directly connected to each other by the rotating shaft 6 in the above-described conventional device, it is difficult to change the rotational force ratio of the overhead wire winch to the shoe chain 1a, and The medium sag could not be easily adjusted.

An object of the present invention is to provide a loop wire drawing device that can easily adjust the sag during wire drawing by using a hydraulic differential.

SUMMARY OF THE INVENTION [Means for Solving the Problems] In view of this object, a wire drawing device according to the present invention comprises a hydraulic motor 8 for braking a shoe chain 1a of a wire drawing vehicle 1, as shown in the drawings of the embodiment described later. Pressure control means 9 and 10 for adjusting the pressure on the pressure side 8a of the hydraulic motor 8, a hydraulic motor 11 for rotating the winder 2, a hydraulic pump 12 for supplying hydraulic oil to the hydraulic motor 11, Pressure side of hydraulic motor 8
And a hydraulic differential 7 for transmitting rotation to a hydraulic motor 11 on the winding side by the pressure of 8a.

[Action]

Now, when the pressure side 8a of the hydraulic motor 8 and the extension T1 are balanced on the payout side, the shoe chain 1a rotates and the wire 5 is paid out. On the other hand, when the hydraulic pump 12 is driven on the winding side at the same time, the hydraulic motor 11
Is rotated, and the winder 2 is also rotated to wind the overhead wire wire rope 3.

In particular, the hydraulic oil on the pressure side 8a of the hydraulic motor 8 on the feeding side is also sent to the hydraulic differential machine 7, and the hydraulic motor 11 on the winding side is rotated by the hydraulic differential machine 7.

When the set pressure on the pressure side 8a of the hydraulic motor 8 changes on the delivery side by the pressure control means 9, 10, the operating pressure of the hydraulic motor 8 on the delivery side and the hydraulic differential 7 changes, and the braking force of the shoe chain 1a changes. Increases or decreases.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

Since the loop drawing method shown in FIG. 1 is basically the same as the conventional loop drawing method shown in FIG. 4, the description is left to the description of the prior art. In particular, as shown in FIG. This is greatly different from the conventional one in that a hydraulic differential 7 is interposed between the shoe chain 1a of the wire drawing wheel 1 and the overhead winch 2 as a winding machine. The differences will be described in detail.

The shoe chain 1a on the feeding side is braked by the hydraulic motor 8. A hydraulic pump 9 is connected to the hydraulic motor 8. A relief valve 10 is provided between the pressure side 8a of the hydraulic motor 8 and the discharge side 9a of the hydraulic pump 9.
Is connected. On the other hand, the overhead wire winch 2 on the winding side is rotated by the hydraulic motor 11, and hydraulic oil is sent to the hydraulic motor 11 by the hydraulic pump 12, so that the hydraulic motor 11 has a pressure side 11a and a hydraulic pump 12 has a discharge side 12a. Is controlled by the relief valve 13.

The hydraulic differential 7 is a hydraulic motor, and a pressure side 8a of the hydraulic motor 8 on the delivery side and a discharge side of the hydraulic pump 9
The pressure side 14a of the hydraulic motor 7 is connected between the relief valve 9a and the relief valve 10 by a hydraulic hose 14. The discharge side 14 b of the hydraulic motor 7 is connected to a hydraulic tank 15 by a hydraulic hose 16. The two hydraulic hoses 14, 16 are detachable by a pipe joint 17. On the other hand, the hydraulic motor 7
The rotary shaft 18 of the take-up side and the rotary shaft 19 of the hydraulic motor 11 on the winding side are mechanically connected so as to be integrally rotatable, and are detachable by a shaft coupling 20.

Now, when the hydraulic pump 9 is driven on the delivery side,
Hydraulic oil is sent to the hydraulic motor 8, and the pressure side of the hydraulic motor 8 is
8a oil pressure rises. When the stop band brake (not shown) of the shoe chain 1a is released, the wire tension T1 is released.
When the pressure and the oil pressure on the pressure side 8a are balanced, the shoe chain 1a rotates. Therefore, the electric wire 5 is fed out. On the other hand, at the same time, the hydraulic pump 12
Is driven, hydraulic oil is sent to the hydraulic motor 11, and the hydraulic motor 11 rotates, and the overhead wire winch 2 also rotates. Therefore,
Winding of the overhead wire rope 3 is performed.

In particular, the hydraulic oil from the hydraulic pump 9 on the delivery side is also sent to the hydraulic motor 7 as a hydraulic differential, and the rotation of the hydraulic motor 7 is transmitted to the hydraulic motor 11 on the winding side.

This is due to the extension tension T1 (minus power) and winding tension T2
(Plus power)
When the diameter of the overhead wire winch 2 is the same as the diameter of the overhead wire winch 2, the principle is that the hydraulic motor 11 on the winding side only needs to drive the difference in rotational force between them. That is, since the braking force of the hydraulic motor 8 on the delivery side is smaller than the required driving force of the hydraulic motor 11 on the winding side, the hydraulic oil from the hydraulic pump 9 on the delivery side provides an oil pressure sufficient to maintain balance. The hydraulic motor 8 distributes the hydraulic oil self-primed from the hydraulic tank 15 to the hydraulic motor 7 as a hydraulic differential and the relief valve 10, and assists the rotational force of the hydraulic motor 7 to the hydraulic motor 11 on the winding side. Hydraulic motor 11
The use of the power is reduced.

When the set pressure of the relief valve 10 on the delivery side is adjusted, the pressure side 8a of the hydraulic motor 8 and the hydraulic pump 9 on the delivery side are adjusted.
The set pressure between the discharge side 9a and the pressure side 14a of the hydraulic motor 7 as a hydraulic differential and the relief valve 10 changes, and the operating pressure of the hydraulic motor 8 on the delivery side and the hydraulic motor 7 as a hydraulic differential changes. And the braking force of the shoe chain 1a increases or decreases. Therefore, the sag during the drawing changes, and the sag during the drawing can be easily adjusted. Further, by adjusting the set pressure of the relief valve 13 on the winding side, it is also possible to adjust the sag during the wire drawing.

The above-described pressure adjustment is performed by the relief valve 1 of the above-described embodiment.
It is also possible to use other pressure control valves other than 0 and 13, a variable pump and a variable motor.

In addition, the shoe chain drawn wheel used in the drawing method which is now generally used is provided with the performance of the drawn wire method, which is capable of tightening in addition to the drawn wire. The same applies to the line pulling vehicle 1 of the present embodiment. Therefore, if one of the two rolling wheels 1 is used for the feeding side and the other is used for the winding side, and the hydraulic differential 7 is appropriately connected thereto, the common rolling wheel 1 can be used in addition to the drawing method. A loop drawing method can also be implemented.

Effect of the Invention According to the present invention, the operating oil on the delivery side acts on the hydraulic motor 8 and the hydraulic differential 7, and the rotational force of the hydraulic differential 7 is given to the hydraulic motor 11 on the winding side in an auxiliary manner. Therefore, the power used by the hydraulic motor 11 can be reduced. In this case, since the hydraulic differential 7 is used, it is possible to easily adjust the sag during the wire drawing only by adjusting the pressure on the feeding side.

[Brief description of the drawings]

1 is a schematic operation explanatory view showing a loop drawing method according to one embodiment of the present invention, FIG. 2 is a schematic drive circuit diagram showing a loop drawing apparatus of FIG. 1, and FIG. 3 is a conventional drawing method. FIG. 4 is a schematic diagram illustrating the conventional loop drawing method, and FIG. 5 is a schematic diagram illustrating the loop drawing device of FIG. 1 ... wire drawn wheel, 1a ... shoe chain, 2 ... overhead wire winch (winding machine), 3 ... overhead wire wire rope, 4 ... drum, 5 ... electric wire, 7 ... hydraulic pressure as a hydraulic differential Motor, 8 ... Hydraulic motor, 9 ... Hydraulic pump, 10 ... Relief valve, 11 ... Hydraulic motor, 12 ... Hydraulic pump, 13 ...
Relief valve, 14,16… Hydraulic hose, 18,19 …… Rotary shaft.

Claims (1)

(57) [Claims] 1. A hydraulic motor (8) for braking a shoe chain (1a) of a line drawing vehicle (1) and pressure control means (9, 9) for adjusting a pressure on a pressure side (8a) of the hydraulic motor (8). 10), a hydraulic motor (11) for rotating the winder (2), a hydraulic pump (12) for feeding hydraulic oil to the hydraulic motor (11), and a pressure side of the hydraulic motor (8) on the feeding side. A wire drawing device comprising: a hydraulic differential (7) for transmitting rotation to a winding-side hydraulic motor (11) by the pressure of (8a).