JPH0295276A - Power applying device for power cable - Google Patents

Abstract

PURPOSE:To enable a power applying even in the case of a high voltage and to prevent a generation of a discharge noise from a connection part by providing the connection part which connects a lead cable for the electromechanics with a power cable in such a manner capable of revolving in an insulating oil. CONSTITUTION:A case 33 is fixed under a collar plate 7 on a feeding drum 1 and a circular ring 49 is fixed on the coolar plate 7. A flange 45 is made to guide by the circular ring 49 and is capable of revolving. As to a tip part of a power applying lead cable 39 inserted from an upper bushing 35, a conductor 48 is connected with a terminal 50 and the terminal 50 is fixed with a bearing 57 capable of revolving as the connection part. An electric-power of the cable 39 is transmitted till a conductor 58 through a bearing 51, conductor connector 53, terminal 54 and terminal 56, and the power is applied to an electric-power cable 9 inserted from a lower bushing 37. And by putting the insulating oil in the bushing 35, 37, then it is possible to maintain an insulation capacity and to use even at the time of applying the power by the high-voltage. Also, because the bearing 51 is in the oil, the discharge noise is not generated at the connection part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a power cable charging device for charging a power cable.

(Prior art) As a method for inspecting partial defects in power cables, the third
There are methods such as corona scanning shown in the figure.

In this method, the delivery drum 1 is composed of a cylindrical winding drum 5 and two tail plates 7 installed at both ends of the winding drum 5, and a power cable 9 is wound around the winding drum 5. The winding drum 3 is similarly constructed. A slip ring type power cable charging device 11 is attached to the center of one flange plate 7 of the delivery drum 1, and the power cable 9 is charged with electricity by this slip ring type power cable charging device 11. A measuring device 13 is attached between the sending drum 1 and the winding drum 3, and a measuring device 71
The presence or absence of a defect in the power cable 9 is determined by the Pl regulator 13.
1llJ is determined.

Therefore, the delivery drum 1 rotates in the direction of the arrow, and the power cable 9 charged by the slip ring type power cable charging device 11 is delivered. The fed-out power cable 9 is measured for defects by a measuring device 13, and is wound onto a winding drum 3 which, like the feeding drum 1, is rotating in the direction of the arrow.

The fourth slip-ring type power cable charging device II
As shown in the figure.

This slip ring type power cable charging device 11 has three rings 1 to maintain continuous electrical contact.
5 and a slider 17.

The slider 17 is fixed, and one end is curved to form the shaft 1.
The other end of the slider is connected to a lead cable for charging (not shown). The shaft 19 is attached to the center of the collar plate 7 of the delivery drum 1, and a ring 15 is provided around the shaft 19. Ring 15 is connected to power cable 9 via a lead wire (not shown).

When the delivery drum 1 rotates, the shaft 19 and the ring 15 wound around the shaft 19 rotate together with the delivery drum 1.
Since the slider 17 is in contact with the ring 15, the power is
The power is supplied to the power cable 9 via the lead cable for charging, the slider 17, the ring 15, and the lead wire.

FIG. 5 shows another slip ring type power cable charging device 21 used in emergency cable cables and the like.

FIG. 5(a) shows a plan view, and FIG. 5(b) shows a side view.

This slip ring type power cable charging device 21 is composed of a combination of three rings 23 and a slider 25.

Three concentric rings 23 are formed on the same plane as the shaft 27, and one curved end of the slider 25 is in contact with each ring 23. The other end of the slider 25 is connected to a power supply lead cable (not shown). A lead wire 29 is connected to the ring 23, and the lead wire 29 is connected to a power cable (not shown).

When the shaft 27 and the ring 23 rotate, the slider 25 contacts the ring 23, and power is supplied to the power cable 9 via the energizing lead cable, the slider 25, the ring 23, and the lead wire 29. .

However, the power cable charging device 11.21 using such a slip ring method has a problem in that it cannot be used to charge power of less than eeooov because the insulation distance cannot be maintained. Furthermore, there is a problem in that discharge noise is generated by the slider 17.25. When discharge noise occurs, slight changes in current during corona measurement etc.
I can't make a fixed one.

(Problems to be Solved by the Invention) As described above, the conventional power cable charging device cannot be used when charging at a high voltage, and there is a problem that discharge noise is generated by the slider.

The present invention has been made in view of these problems, and its purpose is to provide a power cable charging device that can be used even when charging at high voltage and does not generate discharge noise. be.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the power cable charging device of the present invention includes a charging lead cable for supplying power to a power cable, and the charging lead. It is characterized by comprising a cable and a connection part that rotatably connects the power cable.

(Function) In the power cable charging device of the present invention, the connecting part that connects the charging lead cable and the power cable is rotatable, so it can be used even when charging at high voltage, and discharge noise is eliminated from the connecting part. Does not occur.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 shows a power cable charging device according to an embodiment of the present invention.

FIG. 1(a) is a sectional view of a main part of the power cable charging device, and is a sectional view of a delivery drum to which the power cable charging device of FIG. 1(b) is attached.

As shown in FIG. 1(b), the power cable charging device 31
is installed in the horizontally placed delivery drum 1, and as shown in FIG. However, the power cable charging device 31 is placed on the collar plate 7.
A ring 49 is fixed. Power cable charging device 3
1 is composed of two conical sleeves 35 and 37 arranged vertically symmetrically in a cylindrical case 33 filled with SF6 gas. A charging lead cable 39 for charging the power cable 9 is inserted from the upper sleeve 35,
The end of the power cable 9 is inserted through the lower sleeve 37.

As shown in FIG. 1(a), three lead cables for charging are connected from the upper end of the upper sleeve 35 via a protector 41, a self-fusing tape 43, a flange 45, and a bell mouth 47 (a capacitor may be used). It has been penetrated. A concave ring 49 is provided on the outer periphery of the flange 45 to guide the flange 45. The flange 45 is rotatable and the ring 4 is fixed on the plate 7. A case 33 is fixed under the collar plate 7. A conductor 48 is connected to a terminal 50 at the tip of the power supply lead cable 39, and the terminal 50 is attached to a rotatable bearing 51 as a connection part. A conductor connector 5 is provided between the upper cannula 35 and the lower cannula 37.
3 is provided, and the bearing 51 and the terminal 50 are connected to a conductor connector 53, and the terminal 54, the terminal 56, and the conductor 58 of the power cable 9 are connected to the conductor connector 53 in this order.

Further, a disk-shaped support 55 is fixedly attached to the conductor connector 53, and a cylindrical shield ring 57 is attached to the support 55.

The power cable 9 is pulled out of the power cable charging device 31 via the bell mouth 47, the flange 45, the self-fusing tape 43, and the protector 41, and is further connected to the delivery drum 1.
is pulled out of the winding drum 5 and wound around the winding drum 5.

The inside of the case 33 is filled with SF8 gas, and the cannula 35.3
7 is filled with normal pressure insulating oil.

In this embodiment, the delivery drum 1 is installed horizontally and no hydraulic pressure is applied to the insulating oil in the sleeves 33, 35, so that rotational sealing of the flanges is possible.

Next, the operation of this embodiment will be explained according to the power cable defect inspection method shown in FIG.

Inside the delivery drum 1 is a power cable charging system fIt3.
1 is attached. A power cable 9 energized by a power cable energizing device 31 is wound around the winding drum 5 of the delivery drum 1 . The winding drum 3 winds up the power cable 9 pulled out from the delivery drum 1. By rotating the turntable 5, the feed drum 1 or the take-up drum 3, which is horizontally installed thereon, is rotated. The measuring device 13 measures the presence or absence of defects in the energized power cable 9 .

When the turntable 59 rotates, the delivery drum 1 and the take-up drum 3 rotate.

At that time, the power cable 9 is charged with power by the power cable charging device 31 . In other words, the charging lead cable 39
The electric power is transmitted from the conductor 51 to the terminal 50, the bearing 51,
Conductor 58 via conductor connector 53, terminal 54, and terminal 56
The power is transmitted to the power source, and the power is applied to the electric power puller 9.

The energized power cable 9 is pulled out from the delivery drum 1, the presence or absence of defects is measured by a measuring device 13, and then wound onto the winding drum 5.

Thus, in this embodiment, insulation can be ensured by filling the sleeves 33 and 35 with insulating oil, and it can be used even when high voltage is applied. Since the bearing 51 is submerged in oil,
No discharge noise occurs at the connection. Furthermore, since the terminal end of the power cable 9 is in gas, the end treatment of the power cable 9 can be shortened, and construction is simple.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a power cable charging device that can be used even when charging at a high voltage and does not generate discharge noise.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are diagrams showing a power cable charging device according to an embodiment of the present invention, Figure 2 is a diagram showing how to use this embodiment, and Figure 3 is a diagram showing a conventional power cable charging device. Figures 4 and 5 (a) and 5 (b) showing the inspection method are diagrams showing a power cable charging device using a conventional slip ring method. 9... Power cable, 33.35... Mantle, 39.
...Lead cable for charging, 51...Bearing/ and Fig. 4? Figure 5

Claims (1)

[Scope of Claims] A power cable section comprising: a charging lead cable for supplying power to a power cable; and a connecting portion rotatably connecting the charging lead cable and the power cable. Electrical equipment.