CN211604877U - Oil changing device applied to oilpaper capacitive type sleeve - Google Patents
Oil changing device applied to oilpaper capacitive type sleeve Download PDFInfo
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- CN211604877U CN211604877U CN201922054155.4U CN201922054155U CN211604877U CN 211604877 U CN211604877 U CN 211604877U CN 201922054155 U CN201922054155 U CN 201922054155U CN 211604877 U CN211604877 U CN 211604877U
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Abstract
The utility model discloses an oil changing device applied to an oil paper capacitive sleeve, which comprises a sleeve to be changed, a vacuum machine, a vacuum gauge, a fine filter, an oil pump, a coarse filter, a back pressure valve and an oil storage tank; the vacuum machine is connected with a sleeve to be replaced through a first pipeline, and a vacuum gauge and a first ball valve are sequentially arranged on the first pipeline; an output port of the oil storage tank is connected with a sleeve to be replaced through a second pipeline, and a third ball valve, a coarse filter, an oil pump, a fine filter and a second ball valve are sequentially arranged on the second pipeline; the input port of the oil storage tank is connected with the sleeve to be replaced through a third pipeline, and a fourth ball valve and a back pressure valve are sequentially arranged on the third pipeline. The utility model provides a can't change the degradation transformer oil during sleeve pipe maintenance, and lead to changing the problem of whole support sleeve pipe.
Description
Technical Field
The utility model relates to electric power system overhaul of the equipments field particularly, relates to a be applied to oil paper electric capacity type sheathed tube device of changing oil.
Background
The oiled paper capacitor type bushing has the advantages of high insulation utilization coefficient, large specific capacitance, reasonable structure, small volume and the like, and is widely used for outgoing line bushings of 63 kV-level and above voltage levels of large transformers with high voltage levels; in long-term operation, the bushing is subjected to continuous action of internal voltage, and the insulation medium (capacitance cable paper and transformer oil) of the bushing gradually degrades. The sealing rubber gaskets on the sealing surfaces age gradually under the action of sun wind and sunlight ultraviolet rays, and the rubber gaskets harden and crack, so that the sealing effect is lost, and oil leakage is generated or moisture and water enter the inside of the sleeve. These degradation phenomena can increase the dielectric loss of the casing, cause partial discharge, and even cause explosion.
At the present stage, the sleeve cable paper is easily affected with damp, the internal transformer oil is affected with damp or deteriorated, and the sleeve test shows that the dielectric loss exceeds the specified standard and the water content in the oil exceeds the standard, so that the overhauling operation cannot deal with the problems that the cable paper is affected with damp, the internal damped or deteriorated transformer oil is replaced, and the sleeve is forced to be replaced; the sealed cushion of sleeve pipe damages, and the oil leakage appears in the sleeve pipe, overhauls the operation and changes the cushion that became invalid or change damage back of cushion, can't carry out vacuum oiling to the sleeve pipe, compelled to change the problem sleeve pipe.
Therefore, an oil changing device applied to an oil paper capacitive bushing is needed to solve the problem that the bushing cannot be changed due to damp inside the bushing or deteriorated transformer oil when the oil paper capacitive bushing is inspected and repaired.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, the utility model provides a be applied to the sheathed tube device of changing oil of oiled paper electric capacity type to can't change the sheathed tube inside problem of changing the sheathed tube and leading to changing the sheathed tube that wets or the transformer oil deterioration when solving oiled paper electric capacity type sleeve pipe inspection maintenance.
Correspondingly, the utility model provides an oil change device applied to an oil paper capacitance type sleeve, which comprises a sleeve to be changed, a vacuum machine, a vacuum gauge, a fine filter, an oil pump, a coarse filter, a back pressure valve and an oil storage tank;
the vacuum machine is connected with the sleeve to be replaced through a first pipeline, and a vacuum gauge and a first ball valve are sequentially arranged on the first pipeline;
the output port of the oil storage tank is connected with the sleeve to be replaced through a second pipeline, and a third ball valve, a coarse filter, an oil pump, a fine filter and a second ball valve are sequentially arranged on the second pipeline;
the input port of oil storage tank pass through the third pipeline with wait to change bushing, set gradually fourth ball valve and back pressure valve on the third pipeline.
As an optimized technical scheme of the utility model, first ball valve the second ball valve the third ball valve and the fourth ball valve is manual ball valve.
As an optimized technical scheme of the utility model, the vacuum gauge is the digital display pirani vacuum gauge.
As an optimized technical scheme of the utility model, the secondary filter is Q level precision filter.
As an optimized technical scheme of the utility model, be provided with the flowmeter on the secondary filter.
As an optimized technical scheme of the utility model, the flowmeter is differential pressure formula flowmeter.
As an optimized technical scheme of the utility model, the vacuum machine is the rotary-vane vacuum pump.
The utility model provides a be applied to oil paper electric capacity type sheathed tube device of changing oil, the beneficial effect that this device of changing oil reaches is: the problem of have moisture in the cable paper, the in-process of sleeve pipe oiling, bubble in the oil is inside attached to electric capacity screen surface and electric capacity, takes place the bubble discharge in the operation, punctures sleeve pipe electric capacity to and do not can not be to oil paper electric capacity type sleeve pipe vacuum treatment and vacuum oiling, make the equipment of maintenance compelled to change whole sleeve pipe, cause unnecessary extravagant is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a front view showing an oil change apparatus in an embodiment of the present invention;
fig. 2 is a plan view showing an oil change device in an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating the operation of the oil changing device in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Fig. 1 is a front view showing an oil change apparatus in an embodiment of the present invention; fig. 2 is a plan view showing an oil change device in an embodiment of the present invention.
The embodiment of the utility model provides a be applied to oil paper electric capacity type sheathed tube device of changing oil, this device of changing oil is including waiting to change its characterized in that of sleeve pipe: a vacuum machine 1, a vacuum gauge 2, a fine filter 6, an oil pump 7, a coarse filter 8, a back pressure valve 12 and an oil storage tank 10; vacuum machine 1 is responsible for taking out the interior gas of the oil paper electric capacity type sheathed tube that will wait to change oil and maintains the vacuum, oil pump 7 is responsible for taking out qualified transformer oil in the oil storage tank, coarse filter 8 is responsible for coarse filtration and filters out the impurity that particle diameter is big in the transformer oil, fine filter 6 is responsible for further filtering the purity that promotes transformer oil with the transformer oil after the coarse filtration, back pressure valve 12 is used for preventing that liquid backward flow from keeping the pump export to have a constant pressure, oil storage tank 10 is responsible for storing qualified transformer oil.
Specifically, the vacuum machine 1 is connected with the sleeve 4 to be replaced through a first pipeline, and a vacuum gauge 2 and a first ball valve 3 are sequentially arranged on the first pipeline; on the basis that the vacuum machine 1 completely pumps out the gas in the casing 4 to be replaced to enable the gas to be in a negative pressure state, the vacuum gauge 2 measures the gas pressure in an oiled paper capacitance type casing connected with the vacuum machine 1 in real time; and controlling the first pipeline to be communicated or disconnected with the sleeve 4 to be replaced based on the first ball valve 3.
Particularly, the vacuum machine 1 is a rotary-vane vacuum pump, the rotary-vane vacuum pump 1 is a variable-capacity mechanical vacuum pump which utilizes the rotation motion of a rotor and a rotary vane which can slide in a rotor groove to obtain vacuum, and can quickly pump out the gas in the sleeve 4 with the replacement and suck out the moisture of the cable paper.
Particularly, the vacuum gauge 2 is a digital display pirani vacuum gauge, the digital display pirani vacuum gauge 2 is a resistance type vacuum gauge, the air molecules in unit volume are different due to different vacuum degrees, the capacity of taking away heat of a heating resistance wire is different, the temperature of the resistance wire is different, and the resistivity of the resistance wire is a function of temperature, so that the resistivity is different due to different vacuum degrees, the resistance is different, the voltage drop of current on the resistance wire is different, the air pressure can be converted according to the change of voltage, namely the vacuum degree is measured, and the vacuum gauge 2 can accurately read the current pipeline pressure connected with the oil paper capacitance type sleeve and is convenient for a worker to observe and record.
Specifically, an output port of the oil storage tank 10 is connected with the sleeve 4 to be replaced through a second pipeline, and a third ball valve 9, a coarse filter 8, an oil pump 7, a fine filter 6 and a second ball valve 5 are sequentially arranged on the second pipeline; the oil pump 7 is used for producing pressure difference to pump qualified transformer oil into the second pipeline from an output port of the oil storage tank 10, the coarse filter 8 is used for performing coarse filtration on the transformer oil by the coarse filter 8 in a way of passing through the second pipeline to filter impurities with large particle diameters in the oil, then the impurities flow into the fine filter 6 by the oil pump 7, and the fine filter 6 is used for performing fine filtration on the transformer oil to filter out harmful impurities such as water molecules in the transformer oil so as to ensure that the transformer oil meets the safety requirement; the second ball valve 5 controls the connection or disconnection state of the second pipeline and the sleeve 4 to be replaced, and the third ball valve 9 controls the connection or disconnection state of the second pipeline and the output port of the oil storage tank 10.
Particularly, the fine filter 6 is a Q-grade fine filter, and the Q-grade fine filter 6 can filter undesirable impurities such as water molecules in the transformer oil to obtain high-quality transformer oil, so that the use safety of the oil paper capacitive bushing is ensured.
Further, a flow meter 61 is arranged on the fine filter 6, and the flow rate of the transformer oil flowing through the fine filter 6 is calculated based on the flow meter 61, so that the filtering volume of the transformer oil is calculated; the flowmeter is a differential pressure flowmeter 61, and the volume of the transformer oil treated by the fine filter 6 is calculated by using the differential pressure of the transformer oil before and after flowing through the flowmeter 61.
Specifically, an input port of the oil storage tank 10 is connected with the sleeve 4 to be replaced through a third pipeline, a fourth ball valve 11 and a back pressure valve 12 are sequentially arranged on the third pipeline, and the third pipeline is controlled to be communicated or closed with the input port of the oil storage tank 10 based on the fourth ball valve 11; the back pressure valve 12 maintains the pressure of the pipe to prevent the transformer oil from flowing back.
Particularly, the first ball valve 3, the second ball valve 5, the third ball valve 9 and the fourth ball valve 11 are manual ball valves, and based on the manual ball valves, an operator can manually control the opening or closing of the outlets of the pipelines.
Fig. 3 is a schematic diagram illustrating the operation of the oil changing device in the embodiment of the present invention.
In the practical operation process of the embodiment of the utility model, the sleeve is detached from the transformer body and vertically installed on the sleeve frame, and after the oil in the sleeve 4 to be replaced is drained, the first pipeline, the second pipeline and the third pipeline are connected to the oil injection port of the military cap of the sleeve 4 to be replaced;
opening the first ball valve 3, closing the second ball valve 5, the third ball valve 9 and the fourth ball valve 11, starting the vacuum machine 1 to vacuumize the oil paper capacitive type sleeve 4, and monitoring the reading on the vacuum gauge 2 by a worker in real time to confirm whether the vacuum state in the oil paper capacitive type sleeve 4 is reached or not, so that all moisture on cable paper is sucked out;
after the oil paper capacitive type sleeve is vacuumized, the vacuum machine 1 and the first ball valve 3 are closed, then the second ball valve 5 and the third ball valve 9 are opened, the oil pump 7 is started, and qualified transformer oil in the oil storage tank 10 flows out from the outlet of the third pipeline to pass through the third ball valve 9, the coarse filter 8, the oil pump 7, the fine filter 6 and the second ball valve 5, and then is injected into the sleeve from the armcap oil injection port of the oil paper capacitive type sleeve 4;
after the oil injection is finished, closing the oil pump 7, opening the fourth ball valve 11, starting the oil injection of the oil pump 7, when the pressure applied to the back pressure valve 12 reaches a set value, the back pressure valve 12 and the fourth ball valve 11 enable the oil pump to be automatically opened, qualified transformer oil flows back to the oil storage tank 10 through the back pressure valve 12 and the fourth ball valve 11 to form a pressure cycle, and static pressure is formed in the oil paper capacitive sleeve 4;
and when the transformer oil circulates for a set time, the oil pump 7, the second ball valve 5, the third ball valve 9 and the fourth ball valve 11 are closed, then an oil sample is taken out from the oil paper capacitor type sleeve 4 for testing, and the device can be detached for use if the testing result is qualified.
The embodiment of the utility model provides a be applied to oily paper electric capacity type sheathed tube device of changing oil, this device of changing oil is based on the vacuum machine the back pressure valve fine filter and coarse filter is to intraductal oil change and suction moisture, ensures through the long time circulation of pressure oil intraductal transformer oil of cover reaches operation requirement to this can't change the intraduct and wet or deteriorate transformer oil and lead to changing the sheathed tube problem when solving oily paper electric capacity type sleeve pipe inspection maintenance.
In addition, the oil change device provided by the embodiment of the present invention is described in detail above, and a specific example should be adopted herein to explain the principle and the implementation manner of the present invention, and the description of the above embodiment is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (7)
1. The oil changing device comprises a sleeve to be changed, and is characterized by further comprising a vacuum machine, a vacuum gauge, a fine filter, an oil pump, a coarse filter, a back pressure valve and an oil storage tank;
the vacuum machine is connected with the sleeve to be replaced through a first pipeline, and a vacuum gauge and a first ball valve are sequentially arranged on the first pipeline;
the output port of the oil storage tank is connected with the sleeve to be replaced through a second pipeline, and a third ball valve, a coarse filter, an oil pump, a fine filter and a second ball valve are sequentially arranged on the second pipeline;
the input port of oil storage tank pass through the third pipeline with wait to change bushing, set gradually fourth ball valve and back pressure valve on the third pipeline.
2. The oil change apparatus of claim 1, wherein the first ball valve, the second ball valve, the third ball valve, and the fourth ball valve are manual ball valves.
3. The oil change apparatus of claim 1, wherein the vacuum gauge is a digital display pirani vacuum gauge.
4. The oil change device of claim 1, wherein the fine filter is a Q-stage fine filter.
5. The oil changing device of claim 1, wherein a flow meter is disposed on the fine filter.
6. The oil change apparatus of claim 5, wherein the flow meter is a differential pressure flow meter.
7. The oil change apparatus of claim 1, wherein the vacuum machine is a rotary-vane vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922054155.4U CN211604877U (en) | 2019-11-25 | 2019-11-25 | Oil changing device applied to oilpaper capacitive type sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922054155.4U CN211604877U (en) | 2019-11-25 | 2019-11-25 | Oil changing device applied to oilpaper capacitive type sleeve |
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| Publication Number | Publication Date |
|---|---|
| CN211604877U true CN211604877U (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922054155.4U Active CN211604877U (en) | 2019-11-25 | 2019-11-25 | Oil changing device applied to oilpaper capacitive type sleeve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111063519A (en) * | 2019-11-25 | 2020-04-24 | 广西电网有限责任公司柳州供电局 | Oil changing device applied to oilpaper capacitive type sleeve |
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2019
- 2019-11-25 CN CN201922054155.4U patent/CN211604877U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111063519A (en) * | 2019-11-25 | 2020-04-24 | 广西电网有限责任公司柳州供电局 | Oil changing device applied to oilpaper capacitive type sleeve |
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