CN110739127A - ultrasonic degassing equipment for transformer oil change device and degassing method thereof - Google Patents
ultrasonic degassing equipment for transformer oil change device and degassing method thereof Download PDFInfo
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- CN110739127A CN110739127A CN201910893896.3A CN201910893896A CN110739127A CN 110739127 A CN110739127 A CN 110739127A CN 201910893896 A CN201910893896 A CN 201910893896A CN 110739127 A CN110739127 A CN 110739127A
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- oil
- sealed container
- transformer
- degassing
- liquid level
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Degasification And Air Bubble Elimination (AREA)
Abstract
The invention discloses ultrasonic degassing equipment for an oil changing device of a transformer and a degassing method thereof, wherein the ultrasonic degassing equipment is connected between an external oil source and the transformer and comprises a sealed container, an oil inlet and an oil outlet which are arranged at two sides of the sealed container, a plurality of ultrasonic transducers are arranged at the bottom of the sealed container, a vacuum pump is connected to the top of the sealed container, the oil inlet is connected to the external oil source, and the oil outlet is connected to the transformer.
Description
Technical Field
The invention relates to the technical field of transformer equipment, in particular to ultrasonic degassing equipment for a transformer oil changing device and a degassing method thereof.
Background
At present, in a power system, an on-load tap changer is used for connecting a power grid, so that the load center voltage is stabilized, the power flow distribution of the power grid is adjusted, the operation condition of electrical equipment is improved, the power supply voltage quality is improved, the industrial and agricultural production requirements are met, the advantage of is achieved, and the application of is achieved in the power system in more than ten years.
In the existing on-load tap changer of the transformer, an oil-immersed on-load split switch is mostly adopted, the voltage ratio of the transformer is changed by adding or subtracting turns of secondary windings or secondary windings of the transformer, and the on-load tap changer is used for changing the number of turns of a high-voltage winding to adjust by changing a split head of the high-voltage winding under the condition of ensuring that the load current is not cut off.
Because the on-load tap changer often achieves the purpose of regulating voltage through the switching of the moving contact and the static contact during the operation, and the oil quality is continuously degraded along with the increase of the voltage regulating times, the oil of the on-load tap changer needs to be replaced when the voltage regulating of the tap changer reaches fixed times or the oil is degraded to fixed times according to the requirement, and in order to prevent the abnormal oil level, the gas pressure regulating action and the oil flow discharge of the on-load tap changer during the oil changing of the on-load tap changer during the operation, the oil changing of the on-load tap changer of the traditional transformer can be only carried out under the.
In order to achieve the purpose of live oil change and simultaneously avoid the problems of abnormal oil level, abnormal gas movement and the like, the oil pipe needs to be subjected to vacuum degassing in advance, but the conventional vacuum degassing equipment has high load and large volume and is not suitable for being applied to oil change of a transformer.
Disclosure of Invention
The invention aims to provide ultrasonic degassing equipment for a transformer oil change device and a degassing method thereof, wherein the ultrasonic degassing equipment can be miniaturized and can realize quick degassing for transformer oil change by changing the structure of the ultrasonic degassing equipment.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
ultrasonic degassing equipment for a transformer oil change device, which is connected between an external oil source and a transformer, comprises a sealed container, an oil inlet and an oil outlet arranged at two sides of the sealed container, a plurality of ultrasonic transducers are arranged at the bottom of the sealed container, a vacuum pump is connected at the top of the sealed container, the oil inlet is connected to the external oil source, and the oil outlet is connected to the transformer.
, the oil inlet is connected with an oil inlet pipeline, the oil inlet pipeline extends into the sealed container, and the outlet of the oil inlet pipeline exceeds the liquid level of the sealed container.
, oil inlet pipelines or the inner wall of the sealed container are provided with oil washing plates which are inclined towards the liquid level.
, an oil baffle is hung at the top of the sealed container and is arc-shaped with the arc surface facing downwards.
, a liquid level sensor is also disposed in the sealed container.
, the sealed container is filled with transformer oil.
, the oil inlet and outlet of the sealed container and the connection with the vacuum pump are provided with switch valves .
The invention also provides degassing methods for the ultrasonic degassing equipment for the transformer oil changing device, which can rapidly degas transformer oil and ensure the safe operation of the equipment.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
charged oil changing method, which is characterized by comprising the following steps:
A1. closing the oil inlet and the oil outlet, starting a vacuum pump to vacuumize the sealed container, and enabling the sealed container to reach a negative pressure state;
A2. simultaneously opening an oil inlet and an ultrasonic transducer, sucking the transformer oil of an external oil source into the sealed container by utilizing negative pressure, and simultaneously carrying out ultrasonic degassing on the transformer oil flowing into the sealed container;
A3. when the liquid level of the transformer oil in the sealed container reaches the height of the liquid level sensor, opening an oil outlet;
A4. and adjusting the power of the vacuum pump and the ultrasonic transducer according to the liquid level height of the transformer oil in the sealed container.
, in the step A4, when the oil level of the hydraulic press is higher than the liquid level sensor, the vacuum pump is turned off to reduce the vacuum degree above the tank body to slow down the oil inlet amount of the oil inlet, and after the liquid level is restored to be lower than the liquid level sensor, the vacuum pump and the valve are turned on again to rapidly remove the gas.
, in the step A2, degassing is required to be performed on a connecting pipeline of the oil inlet and a connecting pipeline of the oil outlet in advance.
Compared with the traditional vacuum degassing device, the volume of the degassing tank body (sealed container) is greatly reduced, the rapid degassing can be realized only by selecting or setting ultrasonic transducers with fixed quantity and power under different flow values, and the degassing is realized in an ultrasonic degassing system without high vacuum degree, but the escaping gas is rapidly sucked out by forming tiny negative pressure, so that the requirements on the power and the vacuum degree of a vacuum pump are low.
Drawings
FIG. 1 is an overall structure schematic of an ultrasonic degassing device for a transformer oil change device and a degassing method thereof provided by the invention;
reference numerals:
11. sealing the container; 12. an ultrasonic transducer; 13. an oil inlet; 14. an oil outlet, a 15-gear oil plate and a 16-washing oil plate.
Detailed Description
It is noted that the following detailed description is exemplary and is intended to provide further explanation of the invention at unless otherwise indicated.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only terms of relationships determined for convenience in describing structural relationships of the parts or elements of the present invention, and are not intended to refer to any parts or elements of the present invention, and are not to be construed as limiting the present invention.
The invention is described in further detail with reference to specific embodiments and drawings.
As shown in fig. 1, ultrasonic degassing equipment for a transformer oil change device is connected between an external oil source and a transformer, and comprises a sealed container 11, an oil inlet 13 and an oil outlet 14 arranged at two sides of the sealed container 11, a plurality of ultrasonic transducers 12 arranged at the bottom of the sealed container 11, and a vacuum pump access port arranged at the top of the sealed container 11.
And the oil inlet is connected with an oil inlet pipeline, the oil inlet pipeline extends into the sealed container, and the outlet of the oil inlet pipeline exceeds the liquid level of the sealed container. The oil inlet surpasses liquid level height, can effectively avoid when the oil feed, strikes the oil that already exists in the sealed container, causes the production of unnecessary bubble.
Oil inlet pipeline or sealed container inner wall all are provided with the washing oil board, and the washing oil board is all put to one side, towards the liquid level direction. The wash oil board on the oil inlet pipeline and the crisscross setting of wash oil board on the sealed container inner wall, after the oil feed, oil is in the same direction as wash oil board and is flowing towards the liquid level because of the difference in height gradually, when the process wash oil board, can effectively go out adnexed large granule impurity in the oil.
The top of the sealed container is hung with an oil baffle plate which is arc-shaped with a downward arc surface. The oil baffle plate can prevent oil from being sucked into the vacuum pump when the oil gushes due to overlarge negative pressure.
The fixed-height position in the sealed container 11 is also provided with a liquid level sensor, the liquid level sensor is used for detecting the liquid level height of the transformer oil in the sealed container 11 and transmitting an obtained liquid level height signal to a controller, the controller can be a PLC commonly used in the industry or other controllers with the same function, the controller is common in the industry, the action principle of the controller is well known by technicians in the field, and the description is not repeated.
The oil inlet 13 is connected to the external oil source, the oil outlet 14 is connected to the transformer, and the oil inlet 13 and the oil outlet 14 of the sealed container 11 and the connection with the vacuum pump are provided with switch valves .
A controller is also provided for controlling the ultrasonic transducer 12 for controlling the output power of the ultrasonic transducer 12.
The embodiment also provides degassing methods using the ultrasonic degassing equipment for the transformer oil change device, and the technical scheme is as follows:
charged oil changing method, comprising the following steps:
A1. closing the oil inlet 13 and the oil outlet 14, starting a vacuum pump to vacuumize the sealed container 11, and enabling the sealed container 11 to reach a negative pressure state;
A2. the connecting line of the oil inlet 13 and the connecting line of the oil outlet 14 need to be degassed in advance. After the degassing is finished in advance, simultaneously opening the oil inlet 13 and the ultrasonic transducer 12, sucking the transformer oil of an external oil source into the sealed container 11 by utilizing negative pressure, and simultaneously carrying out ultrasonic degassing on the transformer oil flowing into the sealed container 11;
A3. when the liquid level of the transformer oil in the sealed container 11 reaches the height of the liquid level sensor, an oil outlet 14 is opened;
A4. and adjusting the power of the vacuum pump and the ultrasonic transducer 12 according to the liquid level height of the transformer oil in the sealed container 11, when the liquid level height of the hydraulic press oil is higher than that of the liquid level sensor, closing the vacuum pump to reduce the vacuum degree above the tank body to slow down the oil inlet amount of the oil inlet 13, and after the liquid level height is recovered to be lower than the liquid level sensor, opening the vacuum pump and the valve again to rapidly remove the gas.
The high-frequency oscillation signal sent by ultrasonic generator is converted into high-frequency mechanical oscillation by transducer and propagated into medium, the liquid flow can make air in the oil produce tens of thousands of micro-bubbles whose diameter is 50-500 micrometers, and the micro-bubbles existed in the liquid can be vibrated under the action of sound field, and these bubbles are formed and grown in the negative pressure zone in which the ultrasonic wave can be longitudinally propagated, and in the positive pressure zone, when the sound pressure is reached to fixed value, the bubbles can be quickly increased, then can be suddenly closed, and when the bubbles are closed, the shock wave can be produced, and the periphery of the bubbles can produce thousands of large air pressures, and the tension stress can be locally produced in the liquid so as to form negative pressure, and the pressure can be reduced, so that the gas originally dissolved in the liquid can be over-saturated.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
- The ultrasonic degassing equipment for the transformer oil change device is connected between an external oil source and a transformer and is characterized by comprising a sealed container, an oil inlet and an oil outlet which are arranged on two sides of the sealed container, a plurality of ultrasonic transducers are arranged at the bottom of the sealed container, a vacuum pump is connected to the top of the sealed container, the oil inlet is connected to the external oil source, and the oil outlet is connected to the transformer.
- 2. The ultrasonic degassing apparatus for the oil change device of the transformer according to claim 1, wherein: the oil inlet is connected with an oil inlet pipeline, the oil inlet pipeline extends into the sealed container, and the outlet of the oil inlet pipeline exceeds the liquid level of the sealed container.
- 3. The ultrasonic degassing apparatus for the oil change device of the transformer according to claim 1, wherein: and oil washing plates are arranged on the inner walls of the oil inlet pipelines or the sealed containers and are inclined towards the liquid level direction.
- 4. The ultrasonic degassing equipment for the oil changing device of the transformer according to any of claims 1 or 3, wherein an oil baffle is hung on the top of the sealed container, and the oil baffle is arc-shaped with the arc surface facing downwards.
- 5. The ultrasonic degassing apparatus for the oil change device of the transformer according to claim 1, wherein: and a liquid level sensor is also arranged in the sealed container.
- 6. The ultrasonic degassing apparatus for the oil change device of the transformer according to claim 1, wherein: and transformer oil is filled in the sealed container.
- 7. The ultrasonic degassing equipment for the transformer oil change device according to claim 1, wherein the oil inlet and the oil outlet of the sealed container and the connection with the vacuum pump are provided with switch valves .
- 8, method for degassing the ultrasonic degassing device for the oil changing device of the transformer according to any of claims 1-4, characterized by comprising the following steps:A1. closing the oil inlet and the oil outlet, starting a vacuum pump to vacuumize the sealed container, and enabling the sealed container to reach a negative pressure state;A2. simultaneously opening an oil inlet and an ultrasonic transducer, sucking the transformer oil of an external oil source into the sealed container by utilizing negative pressure, and simultaneously carrying out ultrasonic degassing on the transformer oil flowing into the sealed container;A3. when the liquid level of the transformer oil in the sealed container reaches the height of the liquid level sensor, opening an oil outlet;A4. and adjusting the power of the vacuum pump and the ultrasonic transducer according to the liquid level height of the transformer oil in the sealed container.
- 9. The degassing method according to claim 8, wherein in the step A4, when the oil level of the hydraulic press is higher than the liquid level sensor, the vacuum pump is turned off to reduce the vacuum degree above the tank body to slow down the oil inlet amount of the oil inlet, and when the liquid level is restored to be lower than the liquid level sensor, the vacuum pump and the valve are turned back on to rapidly degas.
- 10. The degassing method according to claim 8, wherein: in the step a2, degassing is required to be performed on a connecting pipeline of the oil inlet and a connecting pipeline of the oil outlet in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910893896.3A CN110739127A (en) | 2019-09-20 | 2019-09-20 | ultrasonic degassing equipment for transformer oil change device and degassing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910893896.3A CN110739127A (en) | 2019-09-20 | 2019-09-20 | ultrasonic degassing equipment for transformer oil change device and degassing method thereof |
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| Publication Number | Publication Date |
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| CN110739127A true CN110739127A (en) | 2020-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910893896.3A Pending CN110739127A (en) | 2019-09-20 | 2019-09-20 | ultrasonic degassing equipment for transformer oil change device and degassing method thereof |
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| CN (1) | CN110739127A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111365326A (en) * | 2020-03-16 | 2020-07-03 | 北京蔚海明祥科技有限公司 | Hydraulic oil ultrasonic defoaming control system and control method |
| CN113295974A (en) * | 2021-05-19 | 2021-08-24 | 西安交通大学 | Method for measuring transformer oil cavitation threshold based on ultrasonic transducer |
| CN117457327A (en) * | 2023-12-25 | 2024-01-26 | 长春市元尚欣信息科技有限公司 | Low-noise oil-immersed transformer |
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| CN101546646A (en) * | 2009-03-26 | 2009-09-30 | 上海交通大学 | On-line monitoring oil-gas separation device for transformer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111365326A (en) * | 2020-03-16 | 2020-07-03 | 北京蔚海明祥科技有限公司 | Hydraulic oil ultrasonic defoaming control system and control method |
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| CN113295974A (en) * | 2021-05-19 | 2021-08-24 | 西安交通大学 | Method for measuring transformer oil cavitation threshold based on ultrasonic transducer |
| CN113295974B (en) * | 2021-05-19 | 2022-04-05 | 西安交通大学 | Method for measuring transformer oil cavitation threshold based on ultrasonic transducer |
| CN117457327A (en) * | 2023-12-25 | 2024-01-26 | 长春市元尚欣信息科技有限公司 | Low-noise oil-immersed transformer |
| CN117457327B (en) * | 2023-12-25 | 2024-04-30 | 胜利油田华滨福利机电有限责任公司 | Low-noise oil-immersed transformer |
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Application publication date: 20200131 |