JPH06181128A - High-voltage insulating device - Google Patents

Abstract

PURPOSE:To obtain a high-voltage insulating device which can maintain a dielectric strength even when the device is subjected to a wide range of temperature changes, impacts, and vibrations or even when the attitude of the device changes. CONSTITUTION:The inside of a frame body 1 filled up with insulating oil 3 is divided into a high-voltage circuit 5 side and air bag 4 side with a solid partition plate 7 and, at the same time, an orifice is formed through at least part of the plate 7 so that the oil 3 can slowly move from one side to the other side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high voltage insulation device, and more particularly to an oil filled high voltage insulation device in which a high pressure tank is filled with oil for insulating a high voltage.

[0002]

2. Description of the Related Art FIG. 8 is a cross-sectional view showing the structure of a conventional oil-filled high-voltage insulating device, in which 1 is a frame of a high-pressure tank and 2 is a lid for sealing the frame of the high-pressure tank. Three
Is an insulating oil, 4 is an air bag formed by an inert gas such as nitrogen for absorbing expansion of the insulating oil 3, 5 is a high-voltage circuit requiring insulation, and 6 is an airtight state in the frame 1. Is a packing for keeping the above, 9 is an airtight structure connector, and 10 is a connecting cable. Further, 20 is a mesh fence provided between the airbag 4 and the high voltage circuit 5.

Next, the operation will be described. When the operating temperature range is wide, the volume change of the insulating oil 3 may reach 20% or more and the frame of the high-pressure tank may be destroyed, but the inert gas (gas) such as nitrogen in the airbag 4 may be destroyed. The contraction rate is much higher than the expansion rate of insulating oil, which is a liquid,
The air bag 4 absorbs the volume change of the insulating oil 3 to prevent the tank from being destroyed. Further, the mesh-like fence 20 provided at the boundary between the airbag 4 and the high-voltage circuit 5 prevents contact between the airbag 4 and the high-voltage circuit 5, and prevents creeping discharge due to contact between the airbag 4 and the high-voltage circuit 5. It prevents the occurrence.

[0004]

The conventional high-voltage insulation device is configured as described above, and when a strong shock, vibration, posture change or the like is applied from the outside of the frame body 1, the force acts in the direction in which the force acts. Since the insulating oil 3 is pushed, the airbag 4 contracts, thereby reducing the amount of the insulating oil 3 around the high-voltage circuit 5, and the upper part of the high-voltage circuit 5 is exposed from the insulating oil 3 and is discharged. There was a problem that it would end up.

In addition, dust (for example, aluminum scraps, paper scraps, etc.) in the tank, that is, in the frame body 1 is connected in a chain shape between the high-voltage circuit 5 and the frame body 1 and between the respective parts, whereby There is a problem that discharge is generated.

Further, when the operating temperature range of the apparatus becomes wide, the volume change of the insulating oil 3 becomes large, and accordingly,
The air bag 4 for absorbing the volume change of the insulating oil 3 also needs to be large, which causes a problem that the device becomes large.

Further, if water adheres to parts or the like during assembly of the apparatus, or if sweat of an assembly worker enters the tank (inside the frame 1), these moisture will be removed from the apparatus after assembly of the apparatus. There is a problem that the dielectric strength cannot be removed because it cannot be removed.

The present invention has been made to solve the above problems, and provides a high voltage insulation device capable of maintaining dielectric strength even when an external force such as shock, vibration, or posture change is applied. With the goal. Another object of the present invention is to provide a high voltage insulation device capable of preventing discharge due to dust in the tank and maintaining dielectric strength.

Another object of the present invention is to provide a high voltage insulation device which can cope with a wide range of temperature changes with a small air bag. Further, another object of the present invention is to
It is an object of the present invention to provide a high voltage insulation device capable of removing residual water in a tank after assembly and maintaining dielectric strength.

[0010]

A high-voltage insulation device according to the present invention is provided with a partition plate between a high voltage circuit housed in insulating oil and an airbag, and the partition plate is provided on both sides of the partition plate. An orifice is formed to allow oil to flow in and out.

Further, the high voltage insulation device according to the present invention is
A heating device and a cooling device are provided to generate a temperature gradient in the insulating oil in the frame. Further, the high-voltage insulation device according to the present invention is provided with the above-mentioned heater and cooler and a temperature sensor at a predetermined position in the frame. Further, in the high-voltage insulation device according to the present invention, a dust trapping member for trapping dust in the moving insulating oil is provided in the frame body on the airbag side partitioned by the partition plate.

Further, the high voltage insulation device according to the present invention is
An ultrasonic vibrator for vibrating the inside of the frame on the high voltage circuit side, which is partitioned by the partition plate, is provided. Further, the high-voltage insulation device according to the present invention is provided with a moisture absorbing member in the space inside the frame.

[0013]

In the present invention, the partition between the high voltage circuit in the insulating oil and the air bag is partitioned by a partition plate, and the insulating oil can be moved between both sides of the partition plate by the orifice formed in the partition plate. Therefore, it is possible to prevent the insulating oil from abruptly moving due to a sudden impact, vibration, or posture change from the outside of the frame, and prevent the high-voltage circuit from being exposed from the surface of the insulating oil.

Further, in the present invention, since the heat generator and the cooler are attached to the inner surface or the outer surface of the frame body, a temperature gradient occurs in the insulating oil in the frame body, and the insulating oil circulates in the frame body. It is possible to prevent dust such as aluminum dust and paper dust floating in the insulating oil from connecting in a chain between the high voltage circuit and the inner surface of the frame.

Further, in the present invention, since the dust catching portion is formed in the frame body on the side of the airbag which is partitioned by the partition plate, dust floating in the insulating oil circulating in the frame body is caught at one place. It is possible to collect and remove dust from the frame on the high voltage circuit side.

Further, in the present invention, since the ultrasonic vibrator for vibrating the inside of the frame on the high-voltage circuit side, which is partitioned by the partition plate, is provided, dust attached to the inner surface of the frame, parts constituting the high-voltage circuit, etc. Can be suspended in the insulating oil, and the dust attached to the inner surface of the frame and parts can be collected by the dust catching section.

Further, according to the present invention, since the heat generator and the cooler are attached to the inner surface or the outer surface of the frame body and the temperature sensor is provided in the frame body, the heat generation amount and the cooling of the heat generator are determined based on the temperature detected by the temperature sensor. By controlling the cooling amount of the container, it is possible to reduce the temperature change of the insulating oil in the frame body and reduce the volume change of the insulating oil, and to reduce the air bag put into the insulating oil.

Further, in the present invention, since the water absorbing member or the water decomposing member is provided in the upper portion of the frame body, unnecessary moisture in the frame body and sweat of the worker mixed during assembly can be separated from the insulating oil. , Can maintain dielectric strength.

[0019]

【Example】

Example 1. FIG. 1 is a sectional view showing the structure of a high voltage insulation device according to the first embodiment of the present invention.
Is a frame of a high-pressure tank, 2 is a lid forming a part of the frame for sealing the tank, 3 is insulating oil, 4 is an air bag filled with an inert gas such as nitrogen, and 5 requires insulation. A high pressure circuit, 6 a packing for airtightness, 7 a partition plate for partitioning the inside of the frame into the airbag 4 side and the high voltage circuit 5 side, 8 an orifice attached to the partition plate 7, 9 an airtight structure connector, 10 Is a connecting cable. The partition plate 7
A metal mesh for discharging arbitrary charged particles in the insulating oil 3 is attached to.

In the high voltage insulation device of this embodiment, the partition plate 7 causes the high voltage circuit 5 and the air bag 4 to operate even when a sudden impact, vibration, posture change or the like from the outside of the frame 1 acts. It is possible to prevent the contact, and furthermore, since the insulating oil 3 is gently moved between the high pressure circuit 5 side and the airbag 4 side by the orifice 8 formed in the partition plate 7, the insulating oil 3 is prevented from moving rapidly. It is possible to prevent the high voltage circuit 5 from being exposed from the surface of the insulating oil 3, and as a result, unnecessary discharge can be prevented and the dielectric strength can be maintained.

Example 2. FIG. 2 is a perspective view showing an internal structure of a high voltage insulation device according to a second embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, and 11 denotes a cooler, Reference numeral 12 is a heat generator. The cooler 11 and the heat generator 12 are composed of, for example, a thermoelectric conversion element utilizing the Peltier effect. The packing 6, the airtight structure connector 9, and the connection cable 10 shown in the first embodiment are also provided in this high-voltage insulating device, but they are omitted in FIG.

In such a high voltage insulation device of this embodiment, the cooler 1 is provided on the side walls of the outer surface of the frame 1 which face each other.
1 and a heat generator 12 are provided, and a temperature gradient can be formed in the insulating oil 3 in the frame body 1 by the cooler 11 and the heat generator 12, so that the insulating oil 3 circulates in the frame body and is insulated. It is possible to prevent dust such as aluminum scraps and paper scraps floating in the oil 3 from being connected in a chain shape between the high voltage circuit 5 and the frame body 1, and it is possible to prevent generation of unnecessary discharge.

Example 3. FIG. 3 is a perspective view showing an internal structure of a high voltage insulation device according to a third embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding portions, and 7a is a partition. A plate and 13 are mesh-like or filter-like dust traps formed on a part of the partition plate. In this high voltage insulation device, the packing 6, the airtight structure connector 9 and the connection cable 10 shown in the first embodiment are also provided, but they are omitted in FIG.

In the high voltage insulation device of this embodiment as described above, the inside of the frame 1 on the airbag side which is partitioned by the partition plate 7 is further partitioned into two regions by the partition plate 7a, and each of these partitioned regions is divided. Since the air bags 4a and 4b are accommodated in each area and the oil is passed through a part of the partition plate 7a, the dust trap 13 for capturing the dust floating in the oil is formed. When dust floating in the insulating oil 3 reaches the airbag side together with the insulating oil 3 through the orifice 8, this dust is captured by the dust trap 13 provided on the partition plate 7a and re-enters the high voltage circuit 5 side. It is possible to eliminate unnecessary discharge due to dust.

Example 4. FIG. 4 is a perspective view showing an internal structure of a high voltage insulation device according to a fourth embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 3 denote the same or corresponding portions, and 14 denotes ultrasonic vibration. Is a child. In this high voltage insulation device, the packing 6, the airtight structure connector 9 and the connection cable 10 shown in the first embodiment are also provided, but they are omitted in FIG.

In the high voltage insulation device of this embodiment, the inside of the frame body 1 on the high voltage circuit 5 side, which is partitioned by the partition plate 7,
That is, since the ultrasonic transducer 14 is provided on the inner wall surface of the frame body 1 and the wall surface of the partition plate 7 on the high voltage circuit side, the ultrasonic transducer 1
4 makes it possible to vibrate the insulating oil 5 around the high-voltage circuit 5, and as a result, dust attached to the components of the high-voltage circuit 5 and the inner wall surface of the frame 1 is shaken off to the insulating oil 3 The generated dust can be captured by the dust trap 13 as in the third embodiment, and unnecessary discharge due to dust can be eliminated.

Example 5. FIG. 5 is a perspective view showing an internal structure of a high voltage insulation device according to a fifth embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 2 indicate the same or corresponding portions, and 15 is a temperature sensor. is there. In this high voltage insulation device as well, the packing 6, the airtight structure connector 9, and the connection cable 10 shown in the first embodiment are provided, but they are omitted in FIG.

In the high voltage insulation device of this embodiment, as in the case of the second embodiment, a temperature gradient is formed in the insulating oil 3 in the frame 1 and the insulating oil 3 is circulated.
It is possible to prevent dust such as aluminum dust and paper dust floating in the insulating oil 3 from being connected in a chain shape between the high-voltage circuit 5 and the frame 1. Further, a cooler 11 and a heat generator 12 are also provided on the bottom surface of the frame body 1, and the frame body 1 on the airbag 4 side is partitioned by a partition plate 7.
Since the temperature sensor 15 is provided inside, it is possible to control the amount of heat generated by the heat generator 12 and the amount of cooling by the cooler 11 so that the temperature change of the insulating oil 3 is minimized. Since the expansion coefficient is reduced, the airbag 4 itself can be downsized, and the device itself can be downsized.

Example 6. FIG. 6 is a sectional view showing the internal structure of a high voltage insulation device according to a sixth embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 2 indicate the same or corresponding portions, and 16 is a water absorbing member. is there. The water absorbing member 16 is formed by wrapping a desiccant such as silica gel, calcium chloride, sodium sulfate, magnesium sulfate, potassium hydroxide in a porous sheet member that allows oil and water to pass but does not pass the desiccant. Has been done. In this high voltage insulation device as well, the packing 6, the airtight structure connector 9, and the connection cable 10 shown in the first embodiment are provided, but they are omitted in FIG.

In the high-voltage insulation device of this embodiment, the upper part of the frame 1 on the high-voltage circuit 5 side partitioned by the partition plate 7, that is, the inner wall surface of the lid 2 covering the frame 1 absorbs water. Member 1
Since 6 is attached, in the same manner as in the second embodiment,
When a temperature gradient is formed in the insulating oil 3 in the frame 1 and the insulating oil 3 is circulated in the insulating oil 3 when the insulating oil 3 is applied to the water absorbing member 16, a high voltage circuit 5 that floats on the surface of the insulating oil 3 is configured. Moisture that has adhered to each part and sweat from the worker (due to moisture)
And the like are absorbed by the water absorbing member 16, and as a result, water can be prevented from being removed from the insulating oil 3 and the dielectric strength can be prevented from lowering.

Example 7. FIG. 7 is a sectional view showing the internal structure of a high voltage insulation device according to a seventh embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 2 denote the same or corresponding parts, and 17 denotes a water decomposition member, 18 is a valve. Here, the water decomposing member 17 is configured by enclosing a substance that decomposes moisture into a gas by a chemical reaction with a porous sheet member similar to the above, and the valve 18 does not allow oil to pass through, but only the gas. It is configured to pass. In addition, the first
Although the packing 6, the airtight structure connector 9 and the connection cable 10 shown in the embodiment are provided, they are omitted in FIG. 7.

In the high-voltage insulation device of this embodiment as described above, the upper part of the frame 1 on the high-voltage circuit 5 side partitioned by the partition plate 7, that is, the inner wall surface of the lid 2 covering the frame 1 is covered with water. Since the disassembling member 17 is attached and the valve 18 for allowing only gas to pass through is attached to the inner wall, a temperature gradient is formed in the insulating oil 3 in the frame 1 in the same manner as in the second embodiment. When the insulating oil 3 is applied to the water-splitting member 17 when the insulating oil 3 is circulated, the moisture adhering to each component forming the high voltage circuit 5 floating on the surface of the insulating oil 3 and the sweat of the worker ( It is possible to prevent the insulation resistance from being lowered due to the water being removed from the insulating oil 3 as a result of being decomposed into a gas and released to the outside of the frame 1 through the valve 18.

In each of the above embodiments, only the high-voltage circuit is housed in the frame, but the low-voltage circuit may be housed together with the high-voltage circuit in the same frame. However, in this case, the high-voltage circuit is housed. It is necessary to provide a metal mesh or the like for discharging any charged particles between the low voltage circuit and the low voltage circuit.

[0034]

As described above, according to the present invention, the partition between the high voltage circuit in the insulating oil and the airbag is partitioned by the partition plate, and the orifices formed in the partition plate separate the partition plate from each other. Since the insulating oil is allowed to move between them, the rapid movement of the insulating oil due to a sudden shock, vibration, or posture change from the outside of the frame is suppressed, and the high-voltage circuit is exposed from the surface of the insulating oil. It is possible to prevent this, and as a result, there is an effect that unnecessary discharge is eliminated and the dielectric strength can be improved.

Further, according to the present invention, since the heat generator and the cooler are attached to the inner wall surface or the outer wall surface of the frame body, a temperature gradient is generated in the insulating oil inside the frame body, and the insulating oil flows inside the frame body. It is possible to prevent dust such as aluminum scraps and paper scraps that circulate and float in the insulating oil from connecting in a chain between the high-voltage circuit and the inner wall surface of the frame, and as a result, there is no unnecessary discharge and the dielectric strength is improved. There is an effect that can be done.

Further, according to the present invention, since the dust catching portion is formed in the frame body on the airbag side which is partitioned by the partition plate, dust floating in the insulating oil circulating in the frame body is located at one place. It is collected and dust is removed from the frame body on the high voltage circuit side, and as a result, unnecessary discharge generated between the high voltage circuit and the inner wall surface of the frame body can be eliminated, and the dielectric strength can be improved. There is an effect that it can be further improved.

Further, according to the present invention, since the ultrasonic vibrator for vibrating the inside of the frame on the high-voltage circuit side, which is partitioned by the partition plate, is provided, the inner surface of the frame body and parts constituting the high-voltage circuit are provided. The attached dust can be floated in the insulating oil, and the dust attached to the inner surface of the frame and parts can be collected by the dust trap, so that the high voltage circuit and the inner wall surface of the frame can be separated from each other. It is possible to eliminate unnecessary discharge that occurs between the electrodes, and it is possible to further improve the dielectric strength.

Further, according to the present invention, since the heat generator and the cooler are attached to the inner surface or the outer surface of the frame body and the temperature sensor is provided in the frame body, the temperature change of the insulating oil in the frame body is reduced. It is possible to reduce the volume change of the insulating oil, and as a result, it is possible to reduce the size of the air bag put in the insulating oil and the device itself.

Further, according to the present invention, since the water absorbing member or the water decomposing member is provided in the upper portion of the frame body, unnecessary water in the frame body and sweat of the worker mixed during assembly are separated from the insulating oil. This has the effect of improving the dielectric strength.

[Brief description of drawings]

FIG. 1 is a sectional view showing the internal structure of a high voltage insulation device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the internal structure of a high voltage insulation device according to a second embodiment of the present invention.

FIG. 3 is a perspective view showing an internal structure of a high voltage insulation device according to a third embodiment of the present invention.

FIG. 4 is a perspective view showing an internal structure of a high voltage insulation device according to a fourth embodiment of the present invention.

FIG. 5 is a perspective view showing the internal structure of a high voltage insulation device according to a fifth embodiment of the present invention.

FIG. 6 is a sectional view showing the internal structure of a high voltage insulation device according to a sixth embodiment of the present invention.

FIG. 7 is a sectional view showing the internal structure of a high voltage insulation device according to a seventh embodiment of the present invention.

FIG. 8 is a cross-sectional view showing the internal structure of a conventional high voltage insulation device.

[Explanation of symbols]

 1 High-pressure tank frame 2 Lid 3 Insulating oil 4 Air bag 5 High-voltage circuit 6 Packing 7 Partition plate 8 Orifice 9 Airtight structure connector 10 Connection cable 11 Cooler 12 Heat generator 13 Dust trap 14 Ultrasonic transducer 15 Temperature sensor 16 Water Absorption member 17 Water decomposition member 18 Valve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seizo Tamii 8-1-1 Tsukaguchihonmachi, Amagasaki City, Hyogo Prefecture Sanryo Electric Co., Ltd.

Claims (7)

[Claims] 1. A high-voltage circuit requiring insulation is accommodated in a frame body, an air bag is filled in the frame body with insulating oil, and an air bag for absorbing expansion of the insulating oil due to temperature change is accommodated. In the high-voltage insulation device, the partition plate having an orifice for passing oil from one side to the other side of the partition plate is provided between the high-voltage circuit and the airbag. High voltage isolation device. 2. The high-voltage insulation device according to claim 1, wherein a heat generator and a cooler are attached to the inner surface or the outer surface of the frame body. 3. The high voltage insulation device according to claim 1, wherein the frame body on the airbag side partitioned by the partition plate is further divided into a plurality of regions by a second partition plate, and the air is provided in each region. While accommodating the bag, at least a part of the second partition plate allows oil to pass from one side of the second partition plate to the other side, and captures dust floating in the oil. A high-voltage insulating device, characterized in that it comprises a floating substance trapping part. 4. The high-voltage insulating device according to claim 3, wherein at least the wall surface of the partition plate on the high-voltage circuit side and the inner wall surface and the outer wall surface of the frame body on the high-voltage circuit side partitioned by the partition plate. On the other hand, a high-voltage insulation device having an ultrasonic vibrator attached. 5. The high-voltage insulation device according to claim 1, wherein a heat generator and a cooler are provided on an inner surface or an outer surface of the frame body, and a temperature sensor is provided on at least a part of the frame body. High voltage insulation device. 6. The high voltage insulation device according to claim 1, wherein a water absorbing member that absorbs water floating in the insulating oil is attached to an upper portion of the frame body. apparatus. 7. The high-voltage insulation device according to claim 1, wherein a water-splitting member that decomposes water floating in the insulating oil is attached to an upper portion of the frame body, and a part of the frame body is attached. A high-voltage insulating device having a valve for discharging the gas generated by the decomposition to the outside of the frame.