JP3064213B2 - Oil recovery jig for OF cable and oil recovery method for OF cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an OF cable oil collecting technique, and more particularly, to an OF cable oil collecting jig and an OF cable oil collecting method.

[0002]

2. Description of the Related Art As a method of diagnosing the deterioration state of an OF cable, an insulating oil in the OF cable is sampled and a gas concentration of hydrogen, methane, ethane, ethylene acetylene, etc., which are degraded microorganisms, contained in the insulating oil is analyzed. Investigation of the state of deterioration of insulating oil has been conducted.

[0003] Such insulating oil has been collected in an OF cable junction box. That is, FIG.
The connector is provided with a connector seat 2 attached to a junction box casing 1 as shown in FIG.
And a cap nut 3 which is screwed onto the connector seat 2 while holding the oil nipple 4 sealed in the cylindrical opening of the connector seat and usually covered with a cap 5.

According to the conventional oil collecting technique, the cap nut 3 and the oil stopper nipple 4 are removed, and instead, as shown in FIG. It was connected with the nut 3. An oil collecting pipe is connected to the through nipple 6, and insulating oil is collected at an appropriate time by opening and closing a valve 7 provided in the pipe.

[0005]

According to the prior art oil collecting technique described above, when removing the cap nut 3 and the oil nipple 4, the oil nipple 4 and the cap nut 3 are scattered by the force of the hydraulic pressure in the connection box. Easy to do. When the cap nut 3 and the oil nipple 4 are reattached after the oil is collected, it is difficult to install the cap nut 3 by the hydraulic force in the connection box, and there is a high risk of damaging the threads of the connector seat 2 into which the cap nut 3 is screwed. Hundreds of sample oils required for analysis
Although it is cc, if the above attachment and detachment is performed, several tens of liters of oil will be released, so clean insulating oil is newly replenished from the oil supply device provided to maintain the oil pressure, and The gas concentration in the insulating oil to be analyzed decreases, which hinders the determination of the degree of deterioration. There was a problem.

Therefore, the present invention solves the above-mentioned problems of the prior art, and enables a desired oil extraction without disassembling a connector in which an oil-tight nipple is fixed with a cap nut.
An object of the present invention is to provide an oil extraction jig for an F cable and an oil extraction method for an OF cable, and the problem (object) is also at that point.

[0007]

SUMMARY OF THE INVENTION The present invention provides an O
Oil cable jig for F cable is connected to OF cable connector .
Attach the cap nut and oil nipple that constitute this connector.
With the cap nut loosened while holding the oil nipple on the connector seat
A jig body in the form of a cap that can be worn in a state separated from the
The jig body is provided with an oil inlet and a push screw, and the push screw pushes in the oil-tight nipple of the connector by the screwing , and the separated state between the oil-tight nipple and the connector seat is continued.
The passage between the oil stop nipple and the cap nut can be secured . It is preferable that the oil sampling jig body is provided with a cylindrical portion having a female thread that can be screwed into a male screw portion of the connector to which the cap is screwed.

[0008] In addition, the oil collecting method of the OF cable provided by the present invention is a method of oil stopping by loosening the cap nut tightening the oil stopping nipple by one turn in the connector of the OF cable connection box.
The nipple is separated from the connector seat , a cap-shaped oil-collecting jig is mounted on the connector, and the oil-tight nipple of the connector is pushed in with a push screw provided on the oil- collecting jig to thereby stop the oil.
Oil-stop nipple while keeping the nipple and connector seat separated
The oil was collected by securing a passage between the nut and the cap nut .

[0009]

The oil collecting jig according to the present invention and the OF using the same
In the cable oil collecting method, the cap nut in the connector is loosened to the extent that the oil stop nipple moves, which is confirmed by seeping out the insulating oil. After that, an oil sampling jig is mounted on the connector, and a push screw of the jig is screwed in to push the oil stopping nipple, so that a path for insulating oil in the connector is secured. If insulating oil is collected from the oil inlet and analyzed, deterioration diagnosis of the insulating oil can be performed.

[0010] With the above arrangement, it is not necessary to remove the cap nut and the oil nipple of the connector.

[0011]

FIG. 1 shows an embodiment of an oil collecting jig and an OF cable oil collecting method using the same according to the present invention. The oil collecting jig 8 of the present embodiment has a main body in a cap shape, an oil collecting port 10 provided in a side wall of a cylindrical portion, and a push screw 9 screwed into a crown portion from the outside in an axial direction. The bottom of the cylindrical portion of the jig body 8 is provided with an internally threaded portion corresponding to the outer diameter of the male screw portion for the cap of the connector seat 2.

[0012] The oil collecting method using the oil collecting jig 8 will be described in the order of steps.
The cap (5 in FIG. 2) of the connector attached to the (casing) is removed, and the exposed main part of the connector is cleaned with a wiper or the like.

Next, the cap nut is loosened one turn. Do
And the oil stop nipple 4 is made of insulating oil in the connection box.
Of the valve and the connector seat
The so-called separated shape that creates a gap between the valve receiving part of No. 2
State (see FIG. 1). At this time, it is pushed out
The oil nipple 4 hits the cap nut 3 and
Insulating oil does not easily overflow to the outside. Next, the main body portion of the oil sampling jig 8 is screwed into the male screw portion for the cap of the connector seat 2 to be crowned and fixed.

When the setting of the jig is completed as described above, the push screw 9 is rotated in the tightening direction, and the oil stopper nipple 4 is rotated.
To establish a passage between the oil stop nipple 4 and the cap nut 3.
Keep. At this time, the gap between the oil stop nipple 4 and the connector seat 2
Adjust the screw-in amount of the set screw 9 so that the condition can be maintained.
I do. By doing so, the insulating oil in the junction box 1
As shown by the arrow in FIG. 1, the oil nipple 4 is
The gap between the seat 2 and the gap, the oil nipple 4 and the cap nut
3. Make sure that the jig is filled with insulating oil because it overflows through the passageway between the jigs.

An oil sampling pipe is connected to the oil sampling port 10 to collect the overflowing insulating oil for analysis.

After the insulating oil has been collected as described above, the set screw 9 is loosened, and after confirming that the set screw 9 is separated from the oil stop nipple 4, the oil collecting jig 8 is removed and the cap nut 3 is removed again. Tighten (400 kg ・ f ・ cm for tightening)
And). Then, after cleaning the connector and confirming that there is no bleeding of the insulating oil by a color check, the cap may be attached again to restore the original connection box.

Table 1 shows the effect of this embodiment compared with the conventional example (FIG. 3).

[0018]

[Table 1]

What is particularly noteworthy in Table 1 is that the present embodiment is about twice as large in analytical sensitivity as the conventional example.

In the above embodiment, the jig body may be usually made of metal. However, by making the casing part transparent by making it acrylic, air bubbles and the like in the insulating oil can be visually observed, and air at the time of oil collection can be obtained. Helps prevent hugs.

[0021]

According to the oil collecting jig of the present invention and the OF cable oil collecting method using the same as described above, a desired oil collecting can be performed without disassembling the connector in which the oil nipple is fixed with the cap nut. It is possible to achieve an intended object of providing an oil collecting jig for an OF cable and an oil collecting method of an OF cable, which can achieve the above-mentioned purpose, and scatters a cap nut and an oil stop nipple due to the pressure of insulating oil in the cable and releases the oil at the time of oil collecting. The amount of oil can be greatly reduced, and the results obtained by implementing this are significant.

[Brief description of the drawings]

FIG. 1 is a cross-sectional explanatory view showing a state in which an oil sampling jig is mounted on an OF cable connection box and is in an oil sampling state in an embodiment of the present invention.

FIG. 2 is an explanatory sectional view of an OF cable connection box.

FIG. 3 is a cross-sectional explanatory view showing a state of oil collection for an OF cable connection box in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 OF cable connection box 2 Connector seat 3 Cap nut 4 Oil stop nipple 5 Cap 6 Through nipple 7 Valve 8 Oil sampling jig 9 Push screw 10 Oil sampling port

──────────────────────────────────────────────────続 き Continuing from the front page (72) Yoshihide Yamada 5-1-1-5 Higashi-Ueno, Taito-ku, Tokyo Nippon Cable Power Systems Co., Ltd. (72) Hiroshi Kadota 5-chome, Hidakacho, Hitachi City, Ibaraki Prefecture No. 1-1 Inside the Hidaka Plant of Hitachi Cable Co., Ltd. (56) References JP-A-7-264740 (JP, A) JP-A-2-48694 (JP, U) (58) Fields investigated (Int. . ⁷ , DB name) H02G 15/24

Claims (3)

(57) [Claims] (1) This connector is connected to a connector of an OF cable connection box.
With the cap nut and oil nipple constituting the connector
And loosen the cap nut to separate the oil nipple from the connector seat.
A jig body in the form of a cap that can be
The jig body is provided with a lubrication port and a push screw, and the push screw pushes in the oil-tight nipple of the connector by screwing the same to keep the separated state between the oil-tight nipple and the connector seat.
A passage can be secured between the oil stop nipple and the cap nut.
Oil recovery jig for F cable. 2. The oil collecting jig for an OF cable according to claim 1, wherein said jig body can be screwed to a male screw portion of a connector to which a cap is screwed. 3. A method of loosening an oil nipple by loosening a cap nut tightening an oil nipple by one turn in a connector of an OF cable connection box.
The neck is separated from the connector seat , a cap-shaped oil collecting jig is mounted on the connector, and the oil nipple of the connector is pushed in with a push screw provided on the oil collecting jig, so that the oil nipple is stopped.
While maintaining the separation between the neck and the connector seat,
An oil collecting method for an OF cable in which a passage is secured between the cap nut and oil.