JPH097885A - Oil removing device of oil-immersed electric equipment - Google Patents

Abstract

PURPOSE: To provide an oil removing device which is capable of easily and quickly removing oil from an oil-immersed electrical equipment, protecting a surrounding environment against, contamination caused by overflow or leakage of insulating oil, and restraining air from mixing into oil at removal. CONSTITUTION: An oil-immersed electric equipment 1 is equipped with a sealed connector 7, and an oil remover 15 is equipped with an oil path open-close valve 10 whose one end is connected to an oil removing tube 12 linked to the sealed connector 7 and other end is connected to a sealing plug 16 or a tube joint 14 linked to a tube joint 24 of an oil remover 15. When oil is removed from the oil-immersed electric equipment 1, the oil path open-close valve 10 is closed, the oil removing tube 12 is connected to the sealed connector 7, the tube joint 24 of the oil remover 15 is connected to the joint 14 of the oil path open-close valve 10, and then the oil path open-close valve 10 is opened to start removing oil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil collecting apparatus for oil-filled electric equipment, which is attached to a sealing connector portion mounted on the equipment container of oil-filled electric equipment to collect insulating oil in the equipment container. It is about.

[0002]

2. Description of the Related Art FIG. 3 is a perspective view of a main part of a conventional oil-filled electric device. The oil-filled electric device shown here is an oil-filled capacitor for electric power, and an insulating oil having a predetermined electric characteristic (electrical insulation characteristic) is enclosed in the device container 1 which is the capacitor body. In addition, an oil amount adjusting tank (feeding tank) 2 that stores the insulating oil that is sealed in the device container 1 and adjusts the amount of oil in the device container 1 is installed on the upper part of the device container 1. , The insulating bushing 3 is attached.

The insulating oil in the oil amount adjusting tank 2 can be supplied into the device container 1 by a connecting pipe 5 connecting the device container 1 and the oil amount adjusting tank 2. And
The connecting pipe 5 is attachable to and detachable from the equipment container 1 by a connector 6. Further, the top plate portion of the equipment container 1 is equipped with a sealable connector portion 7 that is sealed after injecting a predetermined amount of insulating oil into the equipment container 1. The sealable connector portion 7 has a structure in which insulating oil is injected into the device container 1 and then screwed and closed by a sealing plug (cap) or the like.

The periphery of the oil amount adjusting tank 2 is usually covered with a cover 9. The connector 6 and the sealed connector portion 7 are arranged so as to be housed in the cover 9 as illustrated.

By the way, in the oil-filled electric equipment in which the insulating oil is sealed as described above, the insulating oil in the equipment container 1 is sampled, for example, at regular intervals, and the collected insulating oil is analyzed to detect abnormality or deterioration of the equipment. Diagnosing the condition is being done. In that case, in the oil-filled electric device as shown, the device container 1
Most of them are not equipped with a special mechanism for collecting the insulating oil inside, and when collecting the insulating oil inside the equipment container 1 on site, the connector 6 is removed.

[0006]

However, the connector 6
, The insulation oil overflows from the oil amount adjustment tank 2 and the equipment container 1 to contaminate the surroundings, and the reliability of the analyzed information decreases due to air being entrapped during oil collection. There is a possibility that the mixing of the oil into the equipment container 1 is accumulated every time oil is collected, and repeated oil collection may be a factor that deteriorates the equipment performance.

In order to eliminate this fear, the connector 6
A certain degree of skill is required for attaching and detaching the oil, and if the skill level of the operator is low, the oil collection work time may increase or
There has been a problem that the problems such as the leakage of insulating oil and the mixing of air into the equipment container 1 described above become more serious.

The present invention has been made in view of the above circumstances, and the oil collecting operation is simple and can be completed promptly.
It is another object of the present invention to provide an oil collecting device for an oil-filled electric device capable of preventing the surrounding environment from being contaminated due to an overflow of insulating oil at the time of oil collecting, and further preventing the mixing of air at the time of oil collecting.

[0009]

The above object of the present invention is to provide an oil-filled electric device having a sealed connector, an oil collecting pipe connected to the sealed connector at one end, and a sealing plug or pipe at the other end. It is achieved by providing an oil collecting device for oil-filled electrical equipment, which comprises an oil passage opening / closing valve having a joint connected to the joint.

Another object of the present invention is to provide an oil-filled electric device having a sealed connector, an oil collecting pipe connected to the sealed connector at one end, and a sealing plug or pipe joint at the other end. An oil passage opening / closing valve having a joint, and a three-way cock having one end connected to the joint of the oil passage opening / closing valve, one end connected to a vacuum pump, and the other end connected to an oil sampler. It is also achieved by providing an oil collecting device for oil-filled electrical equipment.

[0011]

According to the above configuration of the present invention, after the oil passage opening / closing valve is closed, the cap that is the sealing means of the sealing connector of the oil-filled electrical equipment is removed to collect oil in the sealing connector portion. Attach one end of the pipe to the sealed connector part of the oil collecting device by screwing etc., and after completing the installation work, connect the oil collecting device to the joint of the oil passage opening / closing valve and open the oil passage opening / closing valve to open the inside of the electrical equipment. Collect the insulating oil from. There may be some leakage of insulating oil to the outside when the oil collecting device is attached to the sealed connector, but it is only small due to overflow from the equipment container, and if the oil collecting device is attached to the connector, The subsequent oil collection can be performed by opening / closing the oil passage opening / closing valve, the insulating oil is prevented from leaking to the outside, and it is possible to easily prevent the mixing of air for oil collection.

Further, a three-way cock is provided between the oil collecting device and the oil passage opening / closing valve, and a vacuum pump is connected to one of the three-way cocks, so that oil collection between the oil collecting device and the oil passage opening / closing valve is performed. The passage can be placed in a vacuum state before the start of oil collection, and the entrainment of air of the insulating oil collected in the oil collector can be reliably prevented.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of an embodiment of an oil collecting apparatus for an oil-filled electric device according to the present invention. The oil collecting device 10 of this embodiment is attached to the sealing connector 7 on the device container 1 of the oil-filled electric device to facilitate oil collection in the device container 1.

The equipment container 1 is of the oil-filled capacitor for electric power shown in FIG. Also, the sealed connector 7
Is configured to close the opening 7b of the cylindrical body 7a that communicates the inside of the device container 1 with the outside of the container by a cap (sealing means) (not shown) screwed onto a male screw 7c engraved on the outer periphery of the cylindrical body 7a. Although it is the same as the sealed connector 7 in FIG. 3, FIG. 3 shows the appearance with the cap attached.

The oil collecting apparatus 10 of this embodiment has one end 11
An oil collecting pipe 12 for providing an oil collecting passage communicating with the inside of the equipment container 1 by connecting the oil collecting pipe to the sealing connector 7.
An oil passage opening / closing valve 13 screwed to the other end of the oil collecting pipe 12 to open / close an oil collecting passage by the oil collecting pipe 12, and an oil passage opening / closing valve 13
A female type joint 14 for attaching and detaching a pipe or the like, and a joint 14
Via the oil passage opening / closing valve 13 via the oil collecting pipe 12 and the oil passage opening / closing valve 13 to store insulating oil in the equipment container 1 that flows out, and a joint 14
And a plug 16 that is attached to the joint 14 instead of the oil sampler 15 and seals the pipe connection portion of the joint 14.

The oil collecting pipe 12 is a copper pipe 17 having a tapered portion formed at one end 11 to be fitted into the cylindrical body 7a of the sealing connector 7, and a copper pipe 17 rotatably attached to the copper pipe 17 so that the sealing connector 7 is sealed. It is provided with a nut 18 which makes the one end 11 of the copper tube 17 and the cylindrical body 7a in a liquid-tight connection state by being screwed onto the male screw 7c. The other end of the oil collecting pipe 12 is connected by being screwed into the oil passage opening / closing valve 13.

In the case of this embodiment, the oil passage opening / closing valve 13 is a ball valve, which is operated by turning the lever 13a.
The oil collecting passage of the oil collecting pipe 12 can be opened or closed. Further, the joint 14 has a structure in which an O-ring 20 is provided for sealing with a mating pipe joint member (that is, a male pipe joint member) that fits into the male / female body.

The oil sampler 15 connects the oil collecting can 22, which serves as a container for storing insulating oil, the flexible pipe 23 inserted up to near the inner bottom of the oil collecting can 22, and the flexible pipe 23 to the joint 14. And a male pipe joint 24, and the pipe joint 2
By fitting 4 into fitting 14, it is connected to fitting 14. In the case of this embodiment, the flexible pipe 23
Uses a silicon tube.

In the oil collecting apparatus 10 as described above, after the oil passage opening / closing valve 13 is closed, the cap which is the sealing means of the sealing connector 7 on the equipment container 1 is removed to remove the sealing connector 7. The one end 11 of the oil collecting pipe 12 is butted to the tip of the cylindrical body 7a of the
Is screwed onto the male screw 7c of the sealed connector 7, whereby the attachment of the oil collecting device 10 to the sealed connector 7 is completed.

After the installation is completed, the oil collector 15 is connected to the joint 14 of the oil passage opening / closing valve 13 to open the oil passage opening / closing valve and collect the insulating oil in the equipment container 1. When the amount collected in the oil collecting can 22 reaches the amount required for analysis, the oil passage opening / closing valve 13 is closed, the oil collecting device 15 is removed from the joint 14, and the sealing plug 16 is attached to the joint 14 of the oil passage opening / closing valve 13. .

When the cap of the sealing connector 7 is removed and the oil collecting pipe 12 is screwed to the sealing connector 7, some leakage of insulating oil may occur to the outside. If the oil collecting device is attached to the connector, it can be performed by opening and closing the oil passage opening / closing valve during the subsequent oil collecting, the insulating oil does not leak to the outside, and the oil collecting oil is not mixed. It can be easy to prevent.

FIG. 2 is a schematic block diagram of another embodiment of the oil collecting apparatus for oil-filled electric equipment according to the present invention. The oil collecting device 28 of the other embodiment is also similar to the case of the above-described one embodiment.
An oil collecting pipe 12 which provides an oil collecting passage communicating with the inside of the equipment container 1 by screwing one end to the completely sealed connector portion 7
And an oil passage opening / closing valve 13 for opening and closing the oil collecting passage by the oil collecting pipe 12, a joint 14 for detaching a pipe or the like from the oil passage opening / closing valve 13, and a detachable attachment to the oil passage opening / closing valve 13 via the joint 14. Oil collecting pipe 12 and oil passage opening / closing valve 13 connected
Oil collector 2 for storing insulating oil in the equipment container that flows out through
9, but the constituent members of the oil sampler 29 are different from the oil sampler 15 of the one embodiment. In addition, oil collecting pipe 1
2. The oil passage opening / closing valve 13 and the pipe joint member 14 are common to those of the first embodiment.

The oil sampler 29 of this embodiment comprises a syringe 31 which serves as a container for storing insulating oil, and a joint 30 with a cock.
A flexible pipe 32 using a silicon tube, and a male pipe joint 33 for connecting the flexible pipe 32 to the joint 14 of the oil passage opening / closing valve 13. The syringe 31 is connected through the joint 30 with a cock.

The joint 30 with a cock has a flexible pipe 32.
The three-way cock 35 connected to the three-way cock 35 and the two-way cock 36 that is connected to the suction port of the syringe 31 and can be attached to and detached from the three-way cock 35 with one touch. The three-way cock 35
A cock with a lock tip that enables attachment / detachment of a hose 37 that is connected to an appropriate vacuum pump (not shown) such as a rotary pump that places a vacuum in the oil collecting passage between the syringe 31 and the oil passage opening / closing valve 13. The two-way cock 36 is a cock with a lock source that opens and closes the suction port of the syringe 31.

The oil collecting device 28 as described above is the same as the oil collecting device 2
After attaching 8 to the sealing connector 7 in the same manner as in the above-mentioned embodiment, the oil collector 29 is connected to the joint 14 of the oil passage opening / closing valve 13, and the two-way cock 36 and the oil passage opening / closing valve 13 are closed. In this state, the oil collecting passage between the oil passage opening / closing valve 13 and the two-way cock 36 is closed by the three-way cock 35.
7, the vacuum pump is operated to bring the inside of the oil collecting passage between the oil passage opening / closing valve 13 and the two-way cock 36 to a predetermined vacuum.

After the inside of the oil collecting passage is evacuated to a predetermined vacuum,
The connection with the hose 37 connected to the three-way cock 35 is closed, and then the oil passage opening / closing valve 13 and the two-way cock 36 are opened to collect the insulating oil inside the equipment container 1. When the amount collected in the syringe 31 reaches the amount required for analysis, the oil passage opening / closing valve 13 is closed, the oil sampler 29 is removed from the joint 14, and the sealing plug 16 is attached to the joint 14 of the oil passage opening / closing valve 13.

In addition to the function and effect of the first embodiment, this embodiment can thoroughly prevent the entrainment of air in the insulating oil collected in the syringe 31, and further improve the reliability of the information obtained by analyzing the oil collection. You can

[0028]

As described in detail above, according to the present invention, there may be some leakage of insulating oil to the outside when the oil collecting device is attached to the sealing connector, but only by overflowing from the equipment container. Only a few are required, the oil collection work is simple, and it can be completed quickly. In addition, it is possible to easily prevent the surrounding environment from being contaminated due to the leakage of the insulating oil at the time of oil collection, and further to prevent the mixing of air at the time of oil collection. If the oil collecting device is attached to the connector, it can be operated by opening and closing the oil passage opening / closing valve at the time of oil collecting after that, the insulating oil will not leak to the outside, and the mixing of air for oil collecting will be prevented. This can be facilitated and the loss of insulating oil during oil collection can be extremely reduced.

Further, a three-way cock is provided between the oil collecting device and the oil passage opening / closing valve, and a vacuum pump is connected to one of the three-way cocks, so that oil collection between the oil collecting device and the oil passage opening / closing valve is performed. The passage can be placed in a vacuum state before the start of oil collection, and the entrainment of air of the insulating oil collected in the oil collector can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of an oil collecting apparatus for an oil-filled electric device according to the present invention.

FIG. 2 is a schematic configuration diagram of another embodiment of an oil collecting device for an oil-filled electric device according to the present invention.

FIG. 3 is a perspective view showing a configuration of a main part of an oil-filled electric device.

[Explanation of symbols]

 1 Equipment container 7 Sealing connector 10, 28 Oil collecting device 12 Oil collecting pipe 13 Oil passage opening / closing valve 14 Joint 15, 29 Oil collecting machine 16 Sealing plug 17 Copper pipe 20 O-ring 22 Oil collecting can 23, 32 Flexible pipe 24, 33 Pipe fitting 30 Fitting with cock 31 Syringe 35 Three-way cock 36 Two-way cock 37 Hose

Claims (2)

[Claims] 1. An oil passage opening / closing, comprising an oil-filled electric device having a sealed connector, an oil collecting pipe connected to the sealed connector at one end, and a joint connected to a sealing plug or a pipe joint at the other end. An oil collecting device for oil-filled electrical equipment, characterized in that it comprises a valve. 2. An oil passage opening / closing, comprising: an oil-filled electric device having a sealed connector; an oil collecting pipe connected to the sealed connector at one end; and a joint connected to a sealing plug or a pipe joint at the other end. An oil-filled electric machine comprising a valve and a three-way cock, one end of which is connected to a joint of the oil passage opening / closing valve, one end of which is connected to a pump, and the other end of which is connected to an oil sampler. Equipment oil collecting device.