JPH07264740A - Hot-line oil take-out apparatus - Google Patents

Abstract

PURPOSE:To make it possible to take out oil in hot lines, by inserting an insulated rotatable member hermetically in an insulating tube body that is joined to a sealed connecting container and forming a mounting part for a connector on the lower side of the rotatable member. CONSTITUTION:A hot-line oil take-out apparatus (A) is mounted on a connector fitting opening 3b. of a sealed connecting container 3. A connector 4 is fitted to a connector mounting part 7 in a way that the connector 4 is put in an insulated tube body 5 and not exposed to the outside. The operation of the connector 4 is carried out using an insulated rotating body 6, while the part in operation is hermetically sealed by the tube body 5 and the rotating body 6. In addition, an oil take-out container is fitted to a take-out container mounting part 9, and the connector 4 is rotated with the rotating body 6. An insulating oil flow-out opening 10 is opened when the rotating body 6 is rotated, and an insulating oil flows in an oil flowing path 11 from the oil flow-out opening 10 to the take-out container mounting part 9. Then, the oil is taken out by the oil take-out container. After the oil with a given quantity is taken, the rotating body 6 is rotated reversely and the connector 4 is closed to stop the flow of the oil, ana the oil tame-out apparatus (A) us removed from the container 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an uninterruptible oil collecting apparatus capable of collecting oil from a hermetically-sealed container while a cable line is in operation.

[0002]

2. Description of the Related Art Of the underground power transmission lines, the OF cable line is O
Consists of an F cable (1), a sealed connection container (3) that surrounds the connection portion of the OF cable (1) in an oil-tight state, and an oil supply device (12) that supplies insulating oil to the OF cable (1). Has been done. The sealed connection container (3) also has a function as an inspection place for collecting insulating oil, and is generally installed in the manhole (13) or the cave. A high-voltage current is flowing through the OF cable (1), and the OF cable (1) is being used during oil collection work in a live state.
If a lightning strike or the like occurs on the steel tower (14) connected to, it is extremely dangerous because a high-voltage lightning impulse is generated, and therefore the insulating oil is currently being collected after a power outage.

[0003] By the way, the OF cable (1) is filled with insulating oil, and the OF cable (1) is effectively used with this insulating oil.
Is insulated. This insulating oil is a sealed connecting container during operation.
Absorbing a small amount of water from (3), deterioration may cause deterioration of electrical insulation characteristics and temperature characteristics, or an abnormality such as generation of flammable gas in insulating oil may occur. Insulating oil is collected and analyzed to prevent accidents due to these abnormalities and deterioration.

Then, as described above, oil is collected from the connector (4) in order to monitor the performance of the insulating oil. This is done by the following method. After completely shutting down the OF cable (1) on the work line,
The worker enters the manhole (13) and the worker removes the insulating cap (4a) wrapping the connector (4) with bare hands. A vinyl bag (16) is attached so as to wrap around the connector (4) screwed to the sealed connection container (3). Rotate the connector (4) with a monkey from above the vinyl bag (16) to open the insulating oil outlet (10). Due to the opening of the insulating oil outlet (10), the insulating oil pressure-filled in the OF cable (1) flows out and collects in the vinyl bag (16). A part may be spilled from the vinyl bag (16) and float on the water accumulated at the bottom of the manhole (13) and diffuse to contaminate the inside of the manhole (13). Break the vinyl bag (16) through the tube while the insulating oil is spilling.
Insert (18) and screw into insulating oil outlet (10) quickly. Finally, the oil collecting device (8) is attached to the tube (18), and the cock (17) attached in the middle of the tube (18) is opened to guide the insulating oil to the oil collecting device (8). When oil collection is completed, the cock (17) is closed, the connector (4) is turned again to close the insulating oil outlet (10), and the spilled insulating oil is wiped off to finish the work.

[0005]

Recently, on the demand side, due to the automation of factory facilities and computerization of offices, it is often operated not only during the daytime but also at midnight, so it is possible to easily perform a power failure for inspection work. It is becoming increasingly difficult to do. Therefore, the present invention has been made in response to such a request, and an object thereof is to enable oil collection in a live line state without any power interruption during the oil collection work of insulating oil, which has conventionally required a power outage. It is what

[0006]

According to the present invention, a connecting end (2) of an OF cable (1) filled with insulating oil is provided.
Is an uninterruptible oil collection device (A) for opening and closing the connector (4) screwed into the sealed connection container (3) that surrounds the oil-tight state. Insulated cylinder body to be mounted
(5), an insulating rotary body (6) rotatably inserted in the insulating cylinder body (5) in an oiltight manner, and a connector mounting portion (7) formed on the lower surface of the insulating rotary body (6).
And an oil collecting device mounting part (9) provided on the insulating cylinder body (5) or the insulating rotating body (6) for mounting the oil collecting device (8) of insulating oil, and the oil collecting device mounting part (9) and the connector ( It is characterized by comprising an insulating oil outflow passage (11) connecting the insulating oil outlet (10) of 4).

The uninterruptible oil collecting device (A) is installed in the connector mounting port (3b) of the sealed connection container (3), and the connector (4) is attached to the connector mounting portion (7) formed on the lower surface of the insulating rotating body (6). ) Is attached. In this case, the metal connector (4) is taken into the insulating cylinder body (5) and does not appear to the outside, and the operation of the connector (4) is also the operation through the insulating rotating body (6). It is completely insulated by the insulating cylinder body (5) and the insulating rotating body (6), and the worker is kept safe even if a high voltage impulse is generated due to a lightning strike. In this state, when the oil sampler (8) is mounted on the oil sampler mounting part (9) and then the insulating rotary body (6) is rotated, the insulating rotary body (6) and the connector (4) are also rotated, and the insulating oil The outlet (10) is opened, and the insulating oil flows out through the insulating oil outlet (10). This spilled insulating oil passes through the insulating oil outflow passage (11) to the insulating oil outlet (10) to the oil sampler mounting part (9), and then to the tube.
Oil will be collected at the oil collector (8) through (18). When a predetermined amount of oil has been collected, the insulating rotating body (6) is reversed to close the connector (4) to stop the outflow of insulating oil, and then the uninterruptible oil collecting device (A) is removed from the sealed connection container (3). As a result, the metal connector (4) can be opened and closed in an insulated state, and even if there is a lightning strike on the steel tower (14) under the live line, the worker will be completely protected. Therefore, it is possible to continue the oil extraction work without blackening the work line.

[0008]

Embodiments of the uninterruptible oil collecting apparatus (A) according to the present invention will be described below with reference to the drawings. Figure 1 is an illustration of the entire OF cable route. Electric power is supplied to the area around the city by an overhead line (14a) suspended from a steel tower (14), and in the city, the OF cable (1) is buried underground. ) Sends it to the substation (12a), transforms it into commercial voltage and supplies it to each home and factory.

The OF cable (1) has an oil feed passage (1b) secured by the hollow spiral tube (1a) at the center as shown in FIG. 2, and a wire bundle (1c) wound around the oil feed passage (1b). It is set up. Conductor bundle
Carbon paper, insulating paper and other insulating materials (1
The oil-proof layer (1e) mainly composed of chloroprene is formed in the outermost layer of d). The inside of the oil-proof layer (1e) is filled with insulating oil that has exuded through the hollow spiral tube (1a), and maintains the insulating effect.

(12) is a refueling device, which is connected to the OF from the substation (12a).
An OF cable that supplies insulating oil to the cable (1).
The insulating oil in (1) is pressurized so that even if any part of the OF cable (1) is damaged and leakage of insulating oil occurs, the insulating oil in the OF cable (1) will not run short. . This OF cable (1) is connected using a sealed connection container (3) at a location such as a manhole (13), and the sealed connection container (3) is provided with a connector (4) for oil collection. There is.

FIG. 3 is a partial sectional view of the sealed connection container (3).
The exposed wire bundle (1) at the end (2) of the OF cable (1)
Place the reinforcing sleeve (2a) inside (c) and fit the conductor connecting tube (2b) onto the outside of the bundle of conductors (1c) and tighten it to complete the bundle of conductors (1c).
The ends (2) of are connected to each other. An insulating oil-impregnated paper (2c) is wrapped around this connection end (2), and a shield tube (2c)
d) is installed, and the entire connection end (2) is the sealed connection container body (3a).
It is stored in an oil tight state at. The insulating oil that has exuded from the OF cable (1) is filled in the sealed connection container body (3a) that is the outermost layer under pressure. (4) is a connector provided in the sealed connection container body (3a), the sealed connection container body (3a)
It is screwed into the connector mounting opening (3b). A male screw is screwed on the outer periphery of the connector mounting opening (3b), and an insulating cap (4a) is usually screwed on.

FIG. 4 shows the internal configuration of the uninterruptible oil collecting device (A).
It is composed of an insulating cylinder body (5) and an insulating rotating body (6). The insulating cylinder body (5) is cylindrical and is composed of an upper metal fitting (5a), a seal cap body (5b) and a connector seat (5c). In the present embodiment, the connector seat (5c) is made of metal, and a female screw hole is formed in the inner periphery of the lower surface screwed cylindrical portion (5c1) projecting at the center of the lower surface. Connector mounting port (3
It is designed to be screwed onto the male screw of b). Reference numeral (5c2) is an O-ring mounted on the lower surface of the lower surface threaded cylindrical portion (5c1).
Further, an upper surface threaded cylinder portion (5c3) is provided on the upper surface of the connector seat (5c) so as to project, and a male screw is screwed on the outer circumference.

The seal cap body (5b) is composed of an insulator (5b1) such as epoxy resin, and upper and lower embedded metal fittings (5b2) (5b3) integrally insert-molded at both ends thereof. The lower embedded metal fitting (5b3) has the connector seat (5
The upper surface screwed cylinder portion (5c3) of c) is screwed. (5c4) is an O-ring mounted on the top surface of the connector seat (5c).
It is pressed against (5b3) to prevent oil leakage. The withstand voltage of the seal cap body (5b) can withstand even a plurality of -50 kV lightning invasions due to a lightning strike applied to the live-line OF cable (1) a plurality of times, for example.

The upper metal fitting (5a) is made of a metal plate and has a mounting hole (5a) at the center for rotatably mounting the insulating rotating body (6).
1) is formed, and an oil collecting hole (5a2) communicating with the internal space of the insulating cylinder body (5) is formed on the side surface, and a nipple (hereinafter referred to as a nipple) that serves as a oil collecting device mounting portion (9) is formed. .)
Is screwed into the oil collection hole (5a2). (Of course, the oil sampler (8) may be directly attached by some means without using the nipple, in which case the oil sampler attachment part of the oil collection hole (5a2) becomes the oil sampler attachment part (9). The upper fitting (5a) is bolted to the upper embedded fitting (5b2). Further, although the nipple (9) is shown attached to the upper fitting (5a), it is not limited to this and can be attached to the insulating rotary body (6).

The insulating rotating body (6) includes an insulating operating part (6a), a metal operating part with a square hole (6b) integrally mounted on an upper end of the insulating operating part (6a), and an insulating operating part. The connector operating portion (6c) integrally attached to the lower end of (6a) and the cap ring (6) fitted to the outer periphery of the upper end of the metal operating portion with square hole (6b).
d) consists of Like the seal cap body (5b), the insulation operating portion (6a) is formed of an insulator such as an epoxy resin, for example, a live wire OF cable.
Even if multiple -50kV lightning inbals are applied to (1) multiple times due to lightning strikes, it can withstand it enough.

A square hole (6b1) for mounting a tool such as a wrench is provided on the upper surface of the square-shaped metal operating portion (6b),
The neck (6b2) is fitted into the mounting hole (5a1) of the upper metal fitting (5a), and the O-ring (5a3) attached to the mounting hole (5a1) is attached to the neck.
It is pressed against the part (5a2) to prevent oil leakage.

The connector operating portion (6c) is provided with a connector mounting hole, which serves as a connector mounting portion (7), on its lower surface so that the connector (4) can be fitted therein and rotated.
(6c1) is an oil outflow hole that communicates with the connector mounting portion (7), and includes the oil outflow hole (6c1), the gap between the insulating cylinder body (5) and the insulating rotating body (6), and the oil collection hole (5a2). An insulating oil outflow passage (11) is formed which connects the nipple (9) and the insulating oil outlet (10) of the connector (4).

As the oil collecting device (8), for example, a large syringe is used, and the nipple (9) and the oil collecting device (8) are connected by a vinyl tube (18), which is opened and closed midway. cock
(17) is installed. The opening and closing cock (17) is a commercially available one, which opens and closes between the nipple (9) and the oil collecting device (8), and releases the air inside the oil collecting device (8) by opening the oil collecting device (8) to the atmosphere. It can be discharged.

Next, the uninterruptible oil collecting apparatus (A) according to the present invention
The operation method will be described. The worker enters the manhole (13) while keeping the OF cable (1) on the work line in a live state, and the worker removes the insulating cap (4a) enclosing the connector (4) with bare hands.

Connector mounting port (3b) of the sealed connection container (3)
Install the uninterruptible oil collection device (A) at the connector mounting port (3b) by screwing the female screw of the connector seat (5c) onto the male screw of. The inner peripheral shape of the connector mounting portion (7) and the outer peripheral shape of the connector (4) match, and at this time, the connector (4) is attached to the connector mounting portion (7) formed on the lower surface of the insulating rotating body (6). ) Is inserted and fixed. In this case, the metal connector (4) is taken into the seal cap body (5b) of the insulating cylinder body (5) and does not appear outside, and
As will be described later, since the operation of the connector (4) is also performed through the insulating rotating body (6), the working portion is completely insulated by the insulating cylinder body (5) and the insulating rotating body (6), even if a lightning strike occurs. Even if a high voltage impulse is generated, the worker is kept safe.

In this state, the oil sampler (8) is attached to the nipple (9) through the vinyl tube (18), and the opening / closing cock (17) is operated to open the oil sampler (8) to the atmosphere, and the oil sampler is opened. The piston in (8) is inserted into the body of the oil sampler to release the air in the oil sampler (8) to the atmosphere, and the air in the oil sampler (8) becomes almost zero. After that, open and close the cock (1) so that the oil collector (8) and the nipple (9) communicate with each other.
Operate 7).

A tool such as a wrench is inserted into the square hole (6b1) of the insulating rotary body (6) to rotate the insulating rotary body (6) to open the insulating oil outlet (10). Due to the opening of the insulating oil outlet (10), the insulating oil pressurized and filled in the OF cable (1) flows out, and the insulating oil outflow passageway (11) {= oil outflow hole (6c1) → insulating cylinder body (5 ) And the insulating rotary body (6) → the oil collecting hole (5a2)} to reach the nipple (9), and further the tube (18) to collect oil in the oil collecting device (8). By moving the piston in the direction of extracting the oil, insulating oil will be accumulated in the body of the oil collector.

When a predetermined amount of oil has been collected, the opening / closing cock
Operate (17) to disconnect between the oil collector (8) and the nipple (9), then rotate the tool in the opposite direction to reverse the insulated rotating body (6) and close the connector (4). , Stop the spill of insulating oil.
After that, the uninterruptible oil collecting device (A) is removed from the sealed connection container (3), and finally the insulating cap (4a) is fitted to seal the connector (4). As a result, the metal connector (4) can be opened and closed in an insulated state, and even if there is a lightning strike on the steel tower (14) under the live line, the worker will be completely protected. Therefore, it is possible to continue the oil extraction work without blackening the work line. Also, there is no oil leakage during work and the inside of the manhole (13) is not polluted, and the uninterruptible oil collection device (A) can be attached and detached in this way, so unlike the stationary type, the quantity is also large. It can be less and the cost can be reduced.

[0024]

According to the present invention, since the metallic connector can be opened and closed completely in an insulated state, it is possible to carry out oil collecting work without interruption of the work line. No oil leaks during work and no contamination of the manhole. Since the uninterruptible oil collecting device (A) can be detached and used, unlike the stationary type, there is an advantage that the number can be small and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic wiring cross-sectional view of an OF cable to which the device of the present invention is applied.

FIG. 2 is a longitudinal sectional view of an OF cable to which the device of the present invention is applied.

FIG. 3 is a partial cross-sectional view of a sealed connection container in which the device of the present invention is mounted.

FIG. 4 is a half cross-sectional view of the uninterruptible oil collection system of the present invention.

FIG. 5 is a plan view of the uninterruptible oil collection device of the present invention.

FIG. 6 is a schematic front view of an oil collecting state by the device of the present invention.

FIG. 7 is a schematic front view of a conventional oil collecting state.

[Explanation of symbols]

 (A) ... Uninterruptible oil collection system (1) ... OF cable (2) ... OF cable connection end (3) ... Sealed connection container (4) ... Connector (5) ... Insulation cylinder body (6) ... Insulation rotating body ( 7)… Connector mounting part (8)… Oil sampler (9)… Oil sampler mounting part (10)… Insulating oil outlet (11)… Insulating oil outflow passage

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiko Okada 6-2-27 Nakanoshima, Kita-ku, Osaka Kansai Electric Power Co., Inc. (72) Ryoichi Sakaguchi 6-2-27 Nakanoshima, Kita-ku, Osaka Kansai Electric Power Co., Ltd. (72) Inventor Takashi Ohira 6-2-27 Nakanoshima, Kita-ku, Osaka City Kansai Electric Power Co., Inc. (72) Inventor Masahiro Tamura 6-2-27 Nakanoshima, Kita-ku, Osaka City Kansai Electric Incorporated (72) Inventor Shigetoshi Miyasaka 4-46, Doi-cho, Amagasaki City, Hyogo Stock Company Kansai Tech (72) Inventor Toshio Hata 4-46, Doi-cho, Amagasaki City, Hyogo Stock Company Kansai In-Tech (72) Inventor Rikio Saito 4-46, Doi-cho, Amagasaki-shi, Hyogo Kansai Co., Ltd. In-Tech (72) Inventor Toshinori Iwamoto 1-3-3 Shimaya, Konohana-ku, Osaka Sumitomo Electric Kekko In the Osaka Works

Claims (1)

[Claims] 1. An uninterruptible oil collection device for opening and closing a connector screwed into a hermetically-sealed connection container that surrounds a connection end of an OF cable filled with insulating oil in an oil-tight state, the hermetically-sealed connection container. Oil-tightly mounted on the insulating cylinder body, an insulating rotary body rotatably inserted into the insulating cylinder body in an oil-tight manner, a connector mounting portion formed on the lower surface of the insulating rotary body, and an insulating cylinder. It is characterized in that it is provided on the main body or the insulating rotating body, and is composed of an oil collecting device mounting portion for mounting an oil collecting device of insulating oil, and an insulating oil outflow passage connecting the oil collecting device mounting portion and the insulating oil outlet of the connector. Uninterruptible oil collection device.