JPH05121882A - High-voltage insulator - Google Patents

Abstract

PURPOSE:To obtain a high-voltage insulator capable of easily deaerating bubbles taken in at the time of sealing. CONSTITUTION:A single operation type deaerating valve 8 for deaerating bubbles in a tank and a single operation type oil injection valve 9 for replenishing oil reducing at the time of deaeration are mounted. The inside of the cover 2 of the tank is formed in a tapered shape in order to easily move bubbles at the time of deaeration.

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. 4 is a sectional view showing a conventional oil-filled high-voltage insulating device, in which 1 is a frame of a high-pressure tank,
Reference numeral 15 is a lid for sealing the tank, 3 is insulating oil, 4 is an air bag for encapsulating an inert gas such as nitrogen, and 5 is an air bag for absorbing the expansion of oil, 5 is a high-voltage circuit requiring insulation, 6 Is a packing for airtightness, and 7 is a fence inserted between the airbag 4 and the high-voltage circuit 5, in order to avoid a creeping discharge generated when the airbag 4 contacts the high-voltage circuit 5 in the oil 3. belongs to.

Next, the operation will be described. Considering a wide operating temperature range, the volume change of the insulating oil 3 is 2
In order to prevent the tank 1 from being destroyed by more than 0%, the fact that the contraction rate of gas is much larger than the expansion rate of oil which is a liquid is used to put the airbag 4 in which gas is enclosed into the tank 1. Absorbs the volume change of the oil 3. A fence 7 is provided at the boundary between the airbag 4 and the high voltage circuit 5.
Is provided to prevent the air bag 4 from coming into contact with the high voltage circuit 5 and generating a creeping discharge.

FIG. 5 is a sectional view of an oil-filled high-voltage insulating device according to another conventional example. In the figure, the same reference numerals as those in FIG. 4 indicate the same or corresponding parts, and 1 is a frame of a high-pressure tank. , 15 is a lid for sealing, 3 is insulating oil, 5 is a high-voltage circuit requiring insulation, 12 is a low-voltage circuit arranged outside the tank, 13 is a connection for connecting the low-voltage circuit 12 and the high-voltage circuit 5. The cable 14 is an airtight connector.

As shown in the figure, conventionally, the low-voltage circuit 12 and the high-voltage circuit 5 are separated, the high-voltage circuit 5 is provided in the high-pressure tank 1 filled with insulating oil 3, and the low-voltage circuit 12 is placed outside the high-pressure tank 1. It was installed to prevent dielectric breakdown between the low voltage circuit 12 and the high voltage circuit 5.

[0006]

However, since the conventional high-voltage insulation device shown in FIG. 4 is configured as described above, when the airbag is mounted, the air bubbles attached to the airbag and the lid are closed. There was a problem that the ions contained in the air taken in at that time were dissolved in the oil, and the dielectric strength of the oil itself was significantly reduced.

The high-voltage insulation device shown in FIG. 5 is constructed as described above, the low-voltage circuit 12 and the high-pressure tank 1 are separated, and the high-pressure tank 1 has a hermetically sealed structure, so that the connector 14 used is airtight. There is a problem in that the structure is unavoidably processed or an airtight structure is processed, and when there are many such connectors 14, the space becomes large.

The present invention has been made to solve the above-mentioned problems, and it is a high-voltage insulating device capable of easily deaerating bubbles taken in at the time of sealing, and further, an air bag after deaerating. It is an object of the present invention to provide a high-voltage insulation device capable of easily adjusting the volume of the.

Further, it is possible to provide a high-voltage insulation device in which the low-voltage circuit part and the high-voltage circuit part can be put in one high-pressure tank, and the number of connectors required for an airtight structure can be minimized. With the goal.

[0010]

A high-voltage insulation device according to the present invention is a high-pressure tank equipped with an air bag, and a deaeration valve that can be opened and closed with one touch and an oil injection valve for replenishing oil that decreases during deaeration. Is provided.

The high-voltage insulation device according to the present invention is
The high-pressure tank lid is equipped with a one-touch degassing valve, the high-pressure tank is equipped with a one-touch opening / closing oil filling valve to replenish the oil that decreases during degassing, and the inside of the tank lid is degassed. It is tapered toward the air valve.

Further, the high voltage insulation device according to the present invention is
A high-pressure tank equipped with a degassing valve that can be opened and closed with one touch and an oil injection valve that replenishes the oil that decreases when degassing, and also with a one-touch type valve that seals gas from the outside in the airbag. Is.

Further, the high-voltage insulation device according to the present invention is
A low-voltage circuit part and a high-voltage circuit part are provided in one high-pressure tank, and between these, the hole diameter is set to discharge at the hole part when any charged particles pass, and the metal is grounded. It is configured to be partitioned by a substrate having a mesh or through holes.

The high-voltage insulation device according to the present invention is
A low-voltage circuit part and a high-voltage circuit part are provided in one high-pressure tank, and between these, the hole diameter is set to discharge at the hole part when any charged particles pass, grounded, metal A substrate having a mesh or a through hole is provided, and an air bag in which a gas is enclosed for absorbing the expansion of oil due to a temperature change is mounted inside the tank.

[0015]

In the present invention, the high pressure tank is provided with the deaeration valve that can be opened and closed with one touch and the oil injection valve for replenishing the oil that decreases when deaeration is performed. On the other hand, the bubbles taken in at the time of sealing can be easily degassed by discharging the oil and by replenishing the oil that evaporates from the degassing valve during degassing from the oil injection valve and replenishes the spilled oil.

Further, in the present invention, the lid of the high-pressure tank is provided with a deaeration valve that can be opened and closed with one touch, and the high-pressure tank is provided with an oil injection valve that can be opened and closed with one touch to replenish the oil that decreases during deaeration. Since the inside of the lid of the tank is tapered toward the deaeration valve, deaeration can be performed more easily.

Further, in the present invention, the high-pressure tank is provided with a deaeration valve that can be opened and closed with one touch and an oil injection valve for replenishing the oil that decreases during deaeration, and a one-touch type in which air is filled with gas. Since the valve is provided, the volume of the airbag can be easily adjusted after deaeration.

Further, according to the present invention, one high-pressure tank is equipped with a low-voltage circuit part and a high-voltage circuit part, and between these, when any charged particle having a hole diameter passes, discharge occurs in the hole part. Since the grounded, metal mesh or through-hole substrate is installed, the dielectric convection generated in the oil or the natural convection due to the temperature distribution causes the dielectric to move from the high voltage circuit to the low voltage circuit. The polarized molecules, dissociated ions, and electrons emitted from the electrodes can be discharged only in the holes before reaching the low-voltage circuit part, and the low-voltage circuit part and the high-voltage circuit part can be put in one high-pressure tank, which is airtight. The number of connectors required in the structure can be minimized.

Further, in the present invention, one low-pressure circuit section and a high-voltage circuit section are provided in one high-pressure tank, and between these, when any charged particles having a hole diameter pass, discharge occurs in the hole section. To the one provided with the grounded, metal mesh or substrate with through holes,
Further, since the air bag in which gas is sealed is installed, the low-voltage circuit section and the high-voltage circuit section can be put in one high-pressure tank, and the number of connectors required for the airtight structure can be minimized. Can absorb the expansion of oil due to temperature change.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the structure of a high voltage insulation device according to a first embodiment of the present invention, in which 1 is a frame of a high pressure tank, 2 is a tapered lid for sealing the tank, and 3 is a lid. Is insulating oil, 4 is an air bag filled with an inert gas such as nitrogen, 5 is a high voltage circuit requiring insulation, 6 is packing for airtightness, 7 is air bag 4 and high voltage circuit 7, air bag A fence inserted between 4 and the lid 2, 8 is a one-touch type deaeration valve attached to the lid 2, and 9 is a one-touch type oil injection valve attached to the frame 1 of the high-pressure tank. is there.

Next, the operation of this embodiment will be described. In consideration of a wide range of operating temperature, by using the fact that the contraction rate of gas is much larger than the expansion rate of oil, which is a liquid, so that the tank 1 is not destroyed by the volume change of the insulating oil 3, An air bag 4 adjusted to a volume capable of absorbing the volume change of oil is put in the tank 1 to absorb the volume change of the oil. In addition, the airbag 4
A fence 7 is provided at the boundary between the high voltage circuit 5 and the high voltage circuit 5 and at the boundary between the airbag 4 and the lid 2 to prevent the air bag 4 from coming into contact with the high voltage circuit portion 5 and generating a creeping discharge.

The deaeration valve 8 is for deaeration of air bubbles taken into the tank when the lid 2 for sealing the tank is attached to the frame 1 of the high-pressure tank or when the airbag 4 is attached. To use. At the time of this deaeration, a vacuum pump is connected to the deaeration valve 8 or the deaeration valve 8 is placed in a tank capable of decompressing while the deaeration valve 8 is open to decompress the inside of the tank to release the bubbles inside.

On the other hand, the oil injection valve 9 is used to replenish the oil that evaporates or spills from the deaeration valve 8 during deaeration.
At this time, if the oil injection valve 9 is opened and oil is injected from another tank, the oil in the tank reduced by deaeration can be replenished. Further, the tapered portion formed inside the lid 2 toward the deaeration valve 8 has a function of facilitating the movement of bubbles during deaeration. Therefore, according to this embodiment, since the deaeration valve 8 and the oil injection valve 9 are provided, it is possible to completely remove the air bubbles taken into the tank when the lid is closed or the air bag is attached, and The oil reduced by the removal can be replenished so that the ions do not dissolve in the oil and the dielectric strength of the oil can be maintained.

FIG. 2 is a sectional view showing the structure of a high-voltage insulation device according to a second embodiment of the present invention, which shows the structure of the first embodiment so that the volume of the airbag can be easily adjusted after deaeration. The high-voltage insulation device according to the embodiment is improved.

In FIG. 2, the same reference numerals as those in FIG. 1 indicate the same or corresponding portions, 1 is a frame of a high pressure tank, 2 is a tapered lid for sealing the tank, 3 is insulating oil, 1
4 is an air bag with a tube having a tube for enclosing an inert gas such as nitrogen, 5 is a high-voltage circuit requiring insulation, 6 is a packing for airtightness, 7 is an air bag 14 and a high-voltage circuit A fence placed between the two, 8 is a one-touch type degassing valve, 9 is a one-touch type oil injection valve, and 10 is attached to the tank frame 1 so that the airbag 14 can be filled with an inert gas such as nitrogen. It is an inert gas filled valve that can be opened and closed with one touch.

Next, the operation of this embodiment will be described. First, before deaerating the air bubbles taken into the tank when the lid is closed or the air bag is attached, the air bag 14 is evacuated to a pressure lower than the deaeration pressure. Then fill the container with oil and degas. Then, a certain amount of gas is sealed in the airbag 14 from the inert gas sealing valve 10 while the degassing valve 8 is open.

According to this embodiment, the air bag 14 can be filled with an inert gas from the outside of the tank.
Since the gas charging valve 10 is attached to the tank frame 1, it is possible to easily adjust the volume of the airbag after deaeration.
It is possible to prevent a decrease in the volume that can be used for arranging the high-pressure component due to the expansion of the airbag after deaeration, and it is possible to always keep the usable space in the container constant.

Further, FIG. 3 is a sectional view showing the structure of a high voltage insulation device according to a third embodiment of the present invention. The present embodiment will be described below with reference to the drawings. In the figure, 1 is a frame of a tank containing high-pressure oil, 2 is a tapered lid for sealing the tank, 3 is insulating oil, 14 is an air bag for absorbing oil expansion due to temperature change, and 5 is high pressure. Circuit, 6 is airtight packing, 7 is a partition shelf, 8 is a deaeration valve, 9 is an oil injection valve, 10 is a gas filling valve such as an inert gas, 11 is a grounded metal mesh or a substrate with through holes etc,
Reference numeral 12 is a low voltage circuit.

The operation of the present invention will be described below. The hole diameter of the grounded metal mesh or the substrate 11 having through holes is set so that whatever charged particles pass, discharge is always performed in the hole portion. As a result, the dielectrically polarized molecules and dissociated ions that move by dielectric convection or natural convection due to temperature distribution from the high-voltage circuit 5 to the low-voltage circuit 12 and the electrons emitted from the electrodes move to the metal mesh or substrate before reaching the low-voltage circuit. Electric discharge will always occur at the holes, preventing dielectric breakdown on the low-voltage side and the high-voltage side.

Further, the air bag 14 works to absorb the expansion of oil due to temperature. The method of using the air bag 14 is the same as that of the second embodiment described above. Before deaerating the air bubbles taken into the tank when the lid is closed or when the air bag is attached, the air bag 14 is set at a pressure higher than the deaeration pressure. After evacuating to a low pressure, the container is filled with oil for deaeration, and a certain amount of gas is enclosed in the airbag 14 from the gas encapsulation valve 10 with the deaeration valve 8 left open.

According to the present embodiment as described above, a grounded metal mesh or a through-holeed substrate having a hole diameter that causes discharge even if any charged particles pass through the tank containing high-pressure oil. Since the low pressure circuit and the high voltage circuit can be put in one high pressure tank without causing dielectric breakdown, the number of connectors required for the airtight structure can be minimized.

[0032]

As described above, according to the present invention, since the deaeration valve and the oil injection valve are provided in the tank containing high-pressure oil, the air bubbles taken into the tank when the lid is closed or the air bag is attached are completely removed. In addition to removing the bubbles, the oil reduced by the removal of the bubbles can be replenished, whereby ions are not dissolved in the oil and the dielectric strength of the oil can be maintained. Further, according to the present invention, since the shape of the inside of the lid is tapered, there is an effect that bubbles can be easily moved during the degassing.

Further, according to the present invention, since the gas sealing valve for sealing the inert gas from the outside of the tank is attached to the airbag, the volume of the airbag can be easily adjusted after degassing, and the air after degassing can be easily adjusted. There is an effect that it is possible to prevent a decrease in the volume that can be used for arranging the high-pressure components due to the expansion of the bag, and it is possible to always keep the space used in the container constant.

Further, according to the present invention, since a grounded metal mesh or substrate having a hole diameter is provided in the high-pressure tank for discharging any charged particles at that portion, dielectric breakdown occurs. Instead, the low-voltage circuit and the high-voltage circuit can be put in one high-pressure tank, and the number of connectors required for the airtight structure can be minimized.

[Brief description of drawings]

FIG. 1 is a diagram showing a high voltage insulation device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a high voltage insulation device according to a second embodiment of the present invention.

FIG. 3 is a diagram showing a high voltage insulation device according to a third embodiment of the present invention.

FIG. 4 is a diagram showing a conventional high voltage insulation device.

FIG. 5 is a diagram showing another conventional high-voltage insulating device.

[Explanation of symbols]

1 Frame of tank containing high pressure oil 2 Tapered lid for sealing the tank 3 Insulating oil 4 Air bag 5 High pressure circuit 6 Packing for airtightness 7 Fence between air bag and high pressure circuit 8 One-touch type Degassing valve 9 One-touch oil injection valve 10 One-touch gas filling valve 11 Grounded metal mesh or through-hole substrate 12 Low-voltage circuit 13 Connection cable 14 Air bag with pipe 15 Lid for sealing tank 16 Airtight Structural connector

Claims (5)

[Claims] 1. A high-voltage insulation device equipped with an air bag for absorbing expansion of oil due to temperature change in an oil-filled tank for insulating high voltage, wherein one-touch for degassing bubbles in the tank. A high-voltage insulation device, comprising: a degassing valve of one type and a one-touch type oil injection valve for replenishing the oil that decreases when degassing. 2. The high-voltage insulation device according to claim 1, wherein the deaeration valve is provided on a lid for sealing the tank, and the inside of the lid is tapered toward the deaeration valve. Characteristic high voltage insulation device. 3. The high-voltage insulation device according to claim 1, wherein the frame of the tank is provided with a one-touch type gas charging valve for charging an inert gas in the airbag. High voltage isolator. 4. An oil-filled tank for insulating a high voltage is equipped with a low-voltage circuit part and a high-voltage circuit part requiring insulation, and a hole diameter is provided between the high-voltage circuit part and the low-voltage circuit part. Is provided with a grounded substrate having a metal mesh or a through hole, which is set to discharge at the hole portion when any charged particles pass therethrough. 5. The high voltage insulation device according to claim 4, wherein an air bag for absorbing expansion of oil due to temperature change is installed in the tank.