CN116469665A - Vacuum paint dipping method for transformer - Google Patents
Vacuum paint dipping method for transformer Download PDFInfo
- Publication number
- CN116469665A CN116469665A CN202310582616.3A CN202310582616A CN116469665A CN 116469665 A CN116469665 A CN 116469665A CN 202310582616 A CN202310582616 A CN 202310582616A CN 116469665 A CN116469665 A CN 116469665A
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- cylinder body
- paint
- paint dipping
- dipping cylinder
- transformer
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- 239000003973 paint Substances 0.000 title claims abstract description 299
- 238000007598 dipping method Methods 0.000 title claims abstract description 139
- 239000012080 ambient air Substances 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 14
- 239000002966 varnish Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000000670 limiting effect Effects 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 claims 4
- 238000010422 painting Methods 0.000 claims 3
- 238000007789 sealing Methods 0.000 description 7
- 239000003570 air Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/005—Impregnating or encapsulating
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Coating Apparatus (AREA)
Abstract
The invention discloses a vacuum paint dipping method of a transformer, which comprises the following steps: step one: vacuumizing the interior of the paint dipping cylinder body; step two: the paint dipping cylinder body is immersed in the insulating paint until the ambient air pressure is restored; step three: the paint dipping cylinder body is separated from the insulating paint, and vacuumizing is carried out, so that a drainage channel is formed between the insulating paint in the transformer and the transformer; step four: immersing the paint dipping cylinder body into insulating paint, vacuumizing, and keeping for 2-3 minutes, wherein the insulating paint flows into the drainage channel; step five: the paint dipping cylinder body is separated from the insulating paint, is vacuumized after the ambient air pressure is recovered, and then is recovered to the ambient air pressure; step six: the paint dipping cylinder body is immersed in insulating paint, is kept for 2-4 minutes after being vacuumized, and is taken out after being restored to the ambient air pressure. The invention provides a vacuum paint dipping method for a transformer, which is characterized in that a negative pressure environment is formed in the transformer, so that insulating paint can flow into the transformer, a drainage channel in the transformer can be formed by circulating type secondary vacuumizing, and the filling degree of the insulating paint is improved.
Description
Technical Field
The invention relates to the field of vacuum paint dipping of transformers.
Background
The Chinese land is wide, 5 basic topography types on land are distributed in China, the altitude is wide in coverage, and the climate temperature and humidity of each land are characterized, so that the method brings about a small challenge to the national power engineering, wherein a national power grid designates unified standards for a 5G intelligent ammeter transformer in order to meet the use conditions of various altitudes, climates and other environments, a 5G intelligent transformer product is required to pass through a double-85-thousand-hour experiment with the temperature of 85 and the humidity of 85, and the product requirement is increased to a single-thousand-hour experiment with the temperature of 85 and the humidity of 95 in order to reach a more reliable product. Because the internal structure of the high-frequency transformer is complex, the conventional vacuum cannot thoroughly remove the air in the product, and after the experiment, the air in the product expands to form gaps, so that moisture enters the transformer to cause bad products, therefore, the original vacuum process needs to be improved, and the generation of the gaps is reduced.
Disclosure of Invention
The invention aims to: in order to overcome the defects in the prior art, the invention provides a vacuum paint dipping method for a transformer, which is beneficial to the inflow of insulating paint into the transformer by forming a negative pressure environment in the transformer, and is beneficial to the formation of a drainage channel in the transformer by circulating type re-vacuumizing, so that the filling degree of the insulating paint into the transformer is effectively improved.
The technical scheme is as follows: in order to achieve the above purpose, the technical scheme of the invention is as follows:
a vacuum paint dipping method of a transformer comprises the following steps:
step one: the transformer is placed in a paint dipping cylinder body, the paint dipping cylinder body is placed in an insulating paint box body, the paint dipping cylinder body is positioned above insulating paint in the insulating paint box body, and the interior of the paint dipping cylinder body is communicated with a negative pressure device for vacuumizing operation;
step two: the negative pressure device pauses vacuumizing, and then a lifting device in the bottom of the insulating paint box drives the paint dipping cylinder body to sink into insulating paint, and the insulating paint enters and exits the paint dipping cylinder body through a communication groove opened on the side wall of the paint dipping cylinder body until the inside of the paint dipping cylinder body is restored to the ambient air pressure;
step three: the lifting device drives the paint dipping cylinder body to separate from the insulating paint, the communication groove is closed, and then the negative pressure device is vacuumized and then kept for 1-2 minutes, so that a drainage channel is formed between the insulating paint filled into the transformer in the second step and the transformer;
step four: the lifting device drives the paint dipping cylinder body to sink into the insulating paint, the insulating paint enters the paint dipping cylinder body through the communicating groove, and after the negative pressure device is vacuumized, the insulating paint is kept for 2-3 minutes and flows into the drainage channel;
step five: the lifting device drives the paint dipping cylinder body to separate from the insulating paint, the communicating groove is closed after the paint dipping cylinder body is restored to the ambient air pressure, and the communicating groove is opened again after the negative pressure device is vacuumized for 2-3 minutes until the interior of the paint dipping cylinder body is restored to the ambient air pressure;
step six: the lifting device drives the paint dipping cylinder body to sink into the insulating paint, the negative pressure device is stopped after vacuumizing until the interior of the paint dipping cylinder body is restored to the ambient air pressure, and the transformer is taken out from the paint dipping cylinder body.
Further, the vacuum degree in the paint dipping cylinder body is-0.08 to-0.1 Mpa, and the vacuum degree in the paint dipping cylinder bodies in the step five and the step six is larger than the vacuum degree in the paint dipping cylinder bodies in the step two, the step three and the step four.
Further, the viscosity of the insulating paint in the insulating paint box body is 25-30S.
Further, a guide chute is formed in the inner wall of the insulating paint box body, the top of the guide chute is opened, and the bottom of the guide chute is arranged at a distance from the bottom surface of the insulating paint box body; the bottom of two sides of the paint dipping cylinder body is fixedly provided with guide clamping plates, one side, far away from the paint dipping cylinder body, of each guide clamping plate is correspondingly embedded in each guide sliding groove, each lifting device comprises a lifting shaft, each insulating paint box bottom driving device is in driving connection with the bottom end of each lifting shaft, and the top end of each lifting shaft is detachably arranged with the bottom of the paint dipping cylinder body; the lifting shaft can drive the paint dipping cylinder body to be separated from the guide chute upwards.
Further, the paint dipping cylinder body comprises a corresponding cylinder body and a bottom plate which can be arranged in a split manner with the corresponding cylinder body, an embedding groove is formed in the side wall of the corresponding cylinder body, the embedding groove is arranged in a surrounding manner along the edge track of the corresponding cylinder body, the bottom of the embedding groove is communicated and is an embedding opening, the edge of the surface of the bottom plate is fixedly provided with an embedding plate body, a plurality of the embedding plate bodies are spliced and fixed in a circumferential direction to form a closed ring plate, and the closed ring plate is embedded into the embedding groove through the embedding opening; when the bottom plate is spliced with the corresponding cylinder body, the closed ring plate is embedded into the top position of the paint dipping cylinder body, and the paint dipping cylinder body formed by the bottom plate and the corresponding cylinder body is communicated with the negative pressure device on the side wall of the insulating paint box body through the guide pipe.
Further, the top of the lifting shaft is detachably mounted with the bottom of the bottom plate, a matched telescopic rod is arranged at the bottom of the guide chute, a driving device at the bottom of the insulating paint box body is in driving connection with the bottom of the matched telescopic rod, and the top of the matched telescopic rod is detachably mounted with the bottom of the guide clamping plate; the lifting shaft is matched with the matched telescopic rod, so that the bottom plate and the corresponding cylinder body are gradually separated, and the inner interval of the paint dipping cylinder body can be increased or decreased in an adjustable mode.
Further, the communicating groove comprises a first communicating opening and a second communicating opening, a plurality of first communicating openings are formed in the side walls of the two sides of the top of the paint dipping cylinder body relatively, the first communicating openings penetrate through the embedded groove, the interior of the paint dipping cylinder body is communicated with the interior of the insulating paint box body through the first communicating openings, and when the sealing ring plate is embedded into the top of the paint dipping cylinder body, the first communicating openings are sealed; the side wall of the bottom of the embedded plate body is provided with a second communication port in a penetrating way, and the embedded groove seals the second communication port; when the bottom plate drives the closed ring plate to be separated from the bottom of the corresponding cylinder body to form the embedded groove, the first communication port is opened, the bottom plate drives the closed ring plate to be continuously separated from the embedded groove, and the second communication port is opened.
Further, a sliding ring groove is formed in the middle of the bottom plate, a rotating ring plate is embedded in the sliding ring groove, and the rotating ring plate is detachably connected with the top of the lifting shaft; a placing plate is fixedly arranged at the top of the rotating ring plate, and a transformer is placed on the placing plate; when the first communication port is opened, the driving device drives the lifting shaft to drive the rotating ring plate to rotate, the rotating ring plate drives the transformer to rotate through the placing plate, and the guiding clamping plate forms a limiting effect on the circumferential direction of the paint dipping cylinder body.
The beneficial effects are that: according to the invention, the inside of the medium transformer is in a negative pressure environment, insulating paint can more easily flow into the inside of the transformer, so that the insulating paint is more deeply filled into the transformer, when a part of insulating paint is positioned in a gap in the inside of the transformer, and when the inside of a paint dipping cylinder body is vacuumized, the air part in the transformer is gradually moved outwards, so that a product is separated from the insulating paint (the insulating paint is high in viscosity, if the insulating paint cannot be directly vacuumized in the insulating paint and effectively pumped into the product), and the end sealing part of the insulating paint enters the inside of the transformer to form a drainage channel through vacuumizing again, so that the insulating paint can rapidly and fully flow into the inside of the transformer, and the filling of the subsequent insulating paint is facilitated; and the drainage channel is not closed for ensuring that the insulating paint flows into the drainage channel before the insulating paint flows into the drainage channel, so that the normal circulation of the drainage channel is ensured, the insulating paint is convenient to flow in, and the filling degree of the insulating paint is effectively improved.
Drawings
FIG. 1 is a step diagram of a paint dipping method;
FIG. 2 is a diagram of the structure of the insulating paint box;
FIG. 3 is a block diagram of a paint dipping cylinder;
FIG. 4 is a diagram of a lifting shaft structure;
FIG. 5 is a diagram of the corresponding cylinder block;
fig. 6 is a block diagram of a closed loop plate.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1-6: a vacuum paint dipping method of a transformer comprises the following steps:
step one: a sealing cover can be arranged on the insulating paint box body, a transformer is placed in the paint dipping cylinder body 1, the paint dipping cylinder body 1 is placed in the insulating paint box body 2, the paint dipping cylinder body 1 is positioned above insulating paint in the insulating paint box body 2, the sealing cover is closed, and the interior of the paint dipping cylinder body 1 is communicated with the negative pressure device 3 for vacuumizing operation; therefore, a vacuum environment is formed inside the transformer, and when the transformer is immersed in the insulating paint, the insulating paint is easier to fill into the transformer, so that the filling effect inside the transformer is improved.
Step two: the negative pressure device 3 pauses vacuumizing, the vacuum degree is-0.08 (the excessive vacuum degree can increase the viscosity of the insulating paint with reduced temperature), then the lifting device in the bottom of the insulating paint box body 2 drives the paint dipping cylinder body 1 to sink into the insulating paint, and the insulating paint enters and exits the paint dipping cylinder body 1 through the communication groove 11 opened on the side wall of the paint dipping cylinder body 1 until the interior of the paint dipping cylinder body 1 is restored to the ambient air pressure; the inside of the transformer is a negative pressure environment, and the insulating paint can flow into the inside of the transformer more easily, so that the insulating paint is filled into the transformer more deeply, and the filling degree is effectively improved.
Step three: the lifting device drives the paint dipping cylinder body 1 to separate from the insulating paint, the communication groove 11 is closed, then the negative pressure device 3 performs vacuumizing and maintains for 1-2 minutes after reaching the vacuum degree of-0.08, and the pressure difference action promotes the insulating paint filled into the transformer in the second step and the transformer to form a drainage channel; the insulating paint at the end part of the product in the previous process flows along with the gap in the product, but can not fill the inside of the product, but can form a drainage channel of the insulating paint (because the viscosity of the insulating paint is high, if the insulating paint is directly vacuumized in the previous process, the viscosity of the insulating paint is increased, the insulating paint can not be effectively pumped into the product in a short time, and the lifting platform is required to be lifted to separate from the insulating paint, so that the resistance of the insulating paint is reduced and the residual air is conveniently discharged), thereby being beneficial to filling the insulating paint in the fourth process;
step four: the lifting device drives the paint dipping cylinder body 1 to sink into the insulating paint, the insulating paint enters the paint dipping cylinder body 1 through the communicating groove 11, the negative pressure device 3 keeps vacuumizing until the vacuum degree is minus 0.08, the vacuum degree is kept for 2 to 3 minutes, and the insulating paint flows along the drainage channel; the vacuum pumping is kept for a period of time, so that when the insulating paint flows into the drainage channel, the insulating paint can always flow along the drainage channel (the insulating paint filled in before can form an insulating paint track, and the subsequent insulating paint can flow along the insulating paint track, so that the insulating paint can be conveniently filled into the transformer through the drainage channel);
step five: the lifting device drives the paint dipping cylinder body 1 to separate out insulating paint, the communicating groove 11 is closed after the paint dipping cylinder body 1 is restored to the ambient air pressure, the negative pressure device 3 is vacuumized and reaches the vacuum degree of-0.09, and the communicating groove 11 is opened again after 2-3 minutes until the interior of the paint dipping cylinder body 1 is restored to the ambient air pressure; the resistance of the product is reduced after the product is separated from the insulating paint, the insulating paint can fully fill the inside of the product after the vacuum degree is increased, residual air is conveniently discharged, and vacuumizing operation is performed again, so that continuous formation of a drainage channel can be facilitated, and when the transformer is immersed in the insulating paint, the insulating paint can be more easily filled into the transformer along the drainage channel, and the filling degree is further improved;
step six: the lifting device drives the paint dipping cylinder body 1 to sink into the insulating paint, the negative pressure device 3 is vacuumized to the vacuum degree of-0.1 and then stops, the insulating paint gradually fills the gap part of the end part of the transformer (the insulating paint at the end part can enter the inside of a product after the previous procedure, a small amount of gaps are reserved at the gap at the end part, the insulating paint can flow into the product conveniently), the insulating paint can flow along the drainage channel smoothly after vacuumization so as to ensure that the insulating paint can flow into the transformer more smoothly, the sealing cover is opened until the inside of the paint dipping cylinder body 1 is restored to the ambient air pressure, then the transformer is taken out from the paint dipping cylinder body 1, the paint dipping is completed, the insulating paint inside the transformer and the product form a whole tightly without gaps after the transformer is dried, and the high humidity can not enter the inside of the product, so that the national network requirements can be met through double 85-thousand-hour experiments.
The vacuum degree in the paint dipping cylinder body 1 is-0.08 to-0.1 Mpa, and the vacuum degree in the paint dipping cylinder body 1 in the step five and the step six is larger than the vacuum degree in the paint dipping cylinder body 1 in the step two, the step three and the step four. The vacuum insulation paint box has the advantages that the drainage channel can be formed by enough pressure difference, meanwhile, the drainage channel can be prevented from being closed easily, the insulation paint can flow in conveniently, the insulation paint can fully fill the inside of a product after the vacuum degree is increased, residual air can be discharged conveniently, the viscosity of the insulation paint in the insulation paint box body 2 is 25-30S, and the insulation paint can be ensured to be in the vacuum degree of-0.1.
A guide chute 21 is formed in the inner wall of the insulating paint box body 2, the top of the guide chute 21 is opened, and the bottom of the guide chute 21 is arranged at a distance from the bottom surface of the insulating paint box body 2; the bottoms of two sides of the paint dipping cylinder body 1 are fixedly provided with guide clamping plates 12, one side, away from the paint dipping cylinder body 1, of each guide clamping plate 12 is correspondingly embedded in each guide chute 21, each lifting device comprises a lifting shaft 4, a driving device at the bottom of each insulating paint box body 2 is in driving connection with the bottom end of each lifting shaft 4, and the top end of each lifting shaft 4 is detachably arranged with the bottom of the paint dipping cylinder body 1; the lifting shaft 4 can drive the paint dipping cylinder body 1 to be separated from the guide chute 21 upwards. The paint dipping cylinder body is clamped in the guide chute through the guide clamping plate, then the paint dipping cylinder body is installed in the insulating paint box body along the guide chute, the top of the guide chute is opened, the paint dipping cylinder body can be conveniently detached integrally, meanwhile, the lifting shaft and the paint dipping cylinder body can be detachably installed, the operation is convenient, the paint dipping cylinder body is conveniently immersed in insulating paint or the paint dipping cylinder body is conveniently caused to be separated from the insulating paint, and the paint dipping operation of a transformer is facilitated.
The paint dipping cylinder body 1 comprises a corresponding cylinder body 13 and a bottom plate 14 which can be arranged in a split manner with the corresponding cylinder body 13, wherein an embedded groove 131 is formed in the side wall of the corresponding cylinder body 13, the embedded groove 131 is arranged in a surrounding manner along the edge track of the corresponding cylinder body 13, the bottom of the embedded groove 131 is arranged in a penetrating manner and is an embedded opening 132, an embedded plate body 141 is fixedly arranged on the surface edge of the bottom plate 14, a plurality of the embedded plate bodies 141 are spliced and fixed in a circumferential direction to form a closed ring plate 142, and the closed ring plate 142 is embedded into the embedded groove 131 through the embedded opening 132; when the bottom plate 14 is spliced with the corresponding cylinder 13, the closed ring plate 142 is embedded into the top position of the paint dipping cylinder 1, and the bottom plate 14 is communicated with the paint dipping cylinder 1 formed by the corresponding cylinder 13 and the negative pressure device 3 on the side wall of the insulating paint box 2 through the guide pipe 31. The corresponding cylinder body, the bottom plate and the closed ring plate are spliced to form a paint dipping cylinder body, so that a closed space can be formed inside the paint dipping cylinder body, the vacuum pumping operation of the negative pressure device is facilitated, meanwhile, the transformer is conveniently installed in the paint dipping cylinder body, and when the paint dipping operation is performed, the paint dipping cylinder body can be easily driven by the bottom plate to sink into insulating paint or separate from the insulating paint, so that the filling degree of the insulating paint is improved; the paint dipping cylinder body is ensured to have a vacuum environment, so that negative pressure is formed in the transformer, and insulating paint is facilitated to flow into the transformer; the bottom plate and the corresponding cylinder body relatively slide, can conveniently open and close the communication groove, be convenient for the inflow and the outflow of insulating varnish, conveniently carry out the dip coating operation many times, do benefit to the insulating varnish and fill into in the transformer.
The top of the lifting shaft 4 is detachably mounted with the bottom of the bottom plate 14, a matched telescopic rod 22 is arranged at the bottom of the guide chute 21, a driving device at the bottom of the insulating paint box body 2 is in driving connection with the bottom of the matched telescopic rod 22, and the top of the matched telescopic rod 22 is detachably mounted with the bottom of the guide clamping plate 12; the lifting shaft 4 is matched with the matched telescopic rod 22 to promote the bottom plate 14 and the corresponding cylinder 13 to gradually separate, and the inner interval of the paint dipping cylinder 1 can be adjusted to be increased or decreased. The telescopic rod is matched to drive the corresponding cylinder body to ascend through the guide clamping plate, the lifting shaft drives the bottom plate to descend, so that the bottom plate is separated from the corresponding cylinder body, the sealing ring plate is gradually separated from the embedded groove, the size of an interval inside the paint dipping cylinder body can be adjusted, when the interval is increased, the negative pressure difference inside the paint dipping cylinder body can be correspondingly increased, insulating paint can flow into the paint dipping cylinder body through the communication groove, insulating paint can be conveniently filled into a gap inside the transformer, when the interval inside the paint dipping cylinder body is reduced, an extrusion effect can be formed on the insulating paint, and the insulating paint can be promoted to flow into the transformer; in the process of continuously increasing and reducing the internal interval of the paint dipping cylinder body, the insulating paint can be caused to vibrate, so that the flowing of the insulating paint is facilitated, and particularly, the insulating paint filled in the transformer can form a resonance effect in the transformer, so that the flowing of the insulating paint is facilitated, and the insulating paint is promoted to flow deeper into the transformer; the filling degree of the insulating paint is improved.
The communicating groove 11 comprises a first communicating opening 111 and a second communicating opening 112, a plurality of first communicating openings 111 are oppositely formed on side walls of two sides of the top of the paint dipping cylinder body 1, the first communicating openings 111 penetrate through the embedded groove 131, the interior of the paint dipping cylinder body 1 is communicated with the interior of the insulating paint box body 2 through the first communicating openings 111, and when the sealing ring plate 142 is embedded into the top position of the paint dipping cylinder body 1, the first communicating openings 111 are sealed; a second communication port 112 is formed on the bottom side wall of the embedded plate 141 in a penetrating manner, and the embedded groove 131 seals the second communication port 112; when the bottom plate 14 drives the closed ring plate 142 to separate from the bottom of the corresponding cylinder 13 from the engaging groove 131, the first communication port 111 is opened, the bottom plate 14 drives the closed ring plate 142 to continue to separate from the engaging groove 131, and the second communication port 112 is opened. When the paint dipping cylinder body is immersed in the insulating paint, the first communication port is opened, then the insulating paint flows into the paint dipping cylinder body from top to bottom, the insulating paint is sprayed onto the transformer, and compared with the insulating paint which enters from bottom to top, the acting force of the insulating paint sprayed onto the transformer by the downward flowing insulating paint is larger, so that the insulating paint is beneficial to being extruded into a gap of the transformer, and simultaneously, the effect of negative pressure in the transformer is matched, so that the filling of the insulating paint into the transformer can be promoted more conveniently; when the paint dipping cylinder body is separated from the insulating paint, the second communication port is opened, and the insulating paint flows out of the insulating paint box body through the second communication port, so that the subsequent vacuumizing operation in the paint dipping cylinder body is facilitated;
a sliding ring groove 143 is formed in the middle of the bottom plate 14, a rotating ring plate 144 is embedded in the sliding ring groove 143, and the rotating ring plate 144 is detachably connected with the top of the lifting shaft 4; a placing plate 145 is fixedly arranged on the top of the rotating ring plate 144, and a transformer is placed on the placing plate 145; when the first communication port 111 is opened, the driving device drives the lifting shaft 4 to drive the rotating ring plate 144 to rotate, the rotating ring plate 144 drives the transformer to rotate through the placing plate 145, and at the moment, the guiding clamping plate 12 forms a limiting effect on the circumferential direction of the paint dipping cylinder body 1; when the transformer sinks into the insulating paint or the transformer is separated from the insulating paint, the driving device drives the lifting shaft to drive the rotating ring plate to rotate, and the rotating ring plate drives the transformer to rotate back and forth through the placing plate, so that the transformer and the insulating paint inside the transformer can form slight rotation force, vibration of the insulating paint inside the transformer is caused, flow of the insulating paint inside the transformer can be promoted, deeper filling of the insulating paint into the transformer can be facilitated after vacuumizing operation, and further filling degree of the insulating paint is improved.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and it is apparent to those skilled in the art that modifications and variations can be made without departing from the above-described principle of the present invention, and these modifications and variations are also regarded as the scope of the invention.
Claims (8)
1. The vacuum paint dipping method for the transformer is characterized by comprising the following steps of:
step one: the transformer is placed in a paint dipping cylinder body (1), the paint dipping cylinder body (1) is placed in an insulating paint box body (2), the paint dipping cylinder body (1) is positioned above insulating paint in the insulating paint box body (2), and the interior of the paint dipping cylinder body (1) is communicated with a negative pressure device (3) to carry out vacuumizing operation;
step two: the negative pressure device (3) pauses vacuumizing, and then a lifting device in the bottom of the insulating paint box body (2) drives the paint dipping cylinder body (1) to sink into insulating paint, and the insulating paint enters and exits into the paint dipping cylinder body (1) through a communication groove (11) opened on the side wall of the paint dipping cylinder body (1) until the interior of the paint dipping cylinder body (1) is restored to the ambient air pressure;
step three: the lifting device drives the paint dipping cylinder body (1) to separate from the insulating paint, the communication groove (11) is closed, and then the negative pressure device (3) is vacuumized and then kept for 1-2 minutes, so that a drainage channel is formed between the insulating paint filled into the transformer in the second step and the transformer;
step four: the lifting device drives the paint dipping cylinder body (1) to sink into the insulating paint, the insulating paint enters the paint dipping cylinder body (1) through the communicating groove (11), the negative pressure device (3) is vacuumized and then kept for 2-3 minutes, and the insulating paint flows into the drainage channel;
step five: the lifting device drives the paint dipping cylinder body (1) to separate from insulating paint, the communicating groove (11) is closed after the paint dipping cylinder body (1) is restored to the ambient air pressure, the negative pressure device (3) is vacuumized, and then the communicating groove (11) is opened again after 2-3 minutes until the interior of the paint dipping cylinder body (1) is restored to the ambient air pressure;
step six: the lifting device drives the paint dipping cylinder body (1) to sink into insulating paint, the negative pressure device (3) is stopped after vacuumizing until the interior of the paint dipping cylinder body (1) is restored to the ambient air pressure, and the transformer is taken out from the paint dipping cylinder body (1).
2. A method of vacuum painting a transformer according to claim 1, characterized in that: the vacuum degree in the paint dipping cylinder body (1) is-0.08 to-0.1 Mpa, and the vacuum degree in the paint dipping cylinder body (1) in the step five and the step six is larger than the vacuum degree in the paint dipping cylinder body (1) in the step two, the step three and the step four.
3. A method of vacuum painting a transformer according to claim 2, characterized in that: the viscosity of the insulating paint in the insulating paint box body (2) is 25-30S.
4. A method of vacuum painting a transformer according to claim 3, and characterized in that: a guide chute (21) is formed in the inner wall of the insulating paint box body (2), the top of the guide chute (21) is opened, and the bottom of the guide chute (21) is arranged at intervals with the bottom surface of the insulating paint box body (2); the bottom of two sides of the paint dipping cylinder body (1) is fixedly provided with guide clamping plates (12), one side, far away from the paint dipping cylinder body (1), of each guide clamping plate (12) is correspondingly embedded in each guide sliding groove (21), each lifting device comprises a lifting shaft (4), a bottom driving device of the insulating paint box body (2) is in driving connection with the bottom end of each lifting shaft (4), and the top end of each lifting shaft (4) is detachably arranged at the bottom of the paint dipping cylinder body (1); the lifting shaft (4) can drive the paint dipping cylinder body (1) to be separated from the guide chute (21) upwards.
5. The method for vacuum varnish impregnation of a transformer according to claim 4, wherein: the paint dipping cylinder body (1) comprises a corresponding cylinder body (13) and a bottom plate (14) which can be arranged in a split mode with the corresponding cylinder body (13), an embedded groove (131) is formed in the side wall of the corresponding cylinder body (13), the embedded groove (131) is arranged in a surrounding mode along the edge track of the corresponding cylinder body (13), the bottom of the embedded groove (131) is communicated and is provided with an embedded opening (132), an embedded plate body (141) is fixedly arranged on the edge of the surface of the bottom plate (14), a plurality of the embedded plate bodies (141) are fixedly spliced in a circumferential mode to form a closed annular plate (142), and the closed annular plate (142) is embedded into the embedded groove (131) through the embedded opening (132); when the bottom plate (14) is spliced with the corresponding cylinder body (13), the closed ring plate (142) is embedded into the top position of the paint dipping cylinder body (1), and the bottom plate (14) is communicated with the paint dipping cylinder body (1) formed by the corresponding cylinder body (13) through the guide pipe (31) and the negative pressure device (3) on the side wall of the insulating paint box body (2).
6. The method for vacuum varnish impregnation of a transformer according to claim 5, wherein: the top of the lifting shaft (4) is detachably mounted with the bottom of the bottom plate (14), a matched telescopic rod (22) is arranged at the bottom of the guide chute (21), a bottom driving device of the insulating paint box body (2) is in driving connection with the bottom end of the matched telescopic rod (22), and the top end of the matched telescopic rod (22) is detachably mounted with the bottom of the guide clamping plate (12); the lifting shaft (4) is matched with the matched telescopic rod (22) to enable the bottom plate (14) to be gradually separated from the corresponding cylinder body (13), and the inner interval of the paint dipping cylinder body (1) can be increased or decreased in an adjustable mode.
7. The method for vacuum varnish impregnation of a transformer according to claim 6, wherein: the paint dipping device comprises a paint dipping cylinder body (1), and is characterized in that the communication groove (11) comprises a first communication port (111) and a second communication port (112), a plurality of first communication ports (111) are oppositely formed in the side walls of the two sides of the top of the paint dipping cylinder body (1), the first communication ports (111) penetrate through the embedded groove (131), the interior of the paint dipping cylinder body (1) is communicated with the interior of the insulating paint box body (2) through the first communication ports (111), and when a closed ring plate (142) is embedded into the top position of the paint dipping cylinder body (1), the first communication ports (111) are closed; a second communication port (112) is formed in the side wall of the bottom of the embedded plate body (141) in a penetrating manner, and the embedded groove (131) seals the second communication port (112); when the bottom plate (14) drives the closed ring plate (142) to be separated from the bottom of the corresponding cylinder body (13) to form the embedded groove (131), the first communication port (111) is opened, the bottom plate (14) drives the closed ring plate (142) to be continuously separated from the embedded groove (131), and the second communication port (112) is opened.
8. The method for vacuum varnish impregnation of a transformer according to claim 7, wherein: a sliding ring groove (143) is formed in the middle of the bottom plate (14), a rotating ring plate (144) is embedded in the sliding ring groove (143), and the rotating ring plate (144) is detachably connected with the top of the lifting shaft (4); a placing plate (145) is fixedly arranged at the top of the rotating ring plate (144), and a transformer is placed on the placing plate (145); when the first communication port (111) is opened, the driving device drives the lifting shaft (4) to drive the rotating ring plate (144) to rotate, the rotating ring plate (144) drives the transformer to rotate through the placing plate (145), and the guiding clamping plate (12) forms a limiting effect on the circumferential direction of the paint dipping cylinder body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310582616.3A CN116469665A (en) | 2023-05-23 | 2023-05-23 | Vacuum paint dipping method for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310582616.3A CN116469665A (en) | 2023-05-23 | 2023-05-23 | Vacuum paint dipping method for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116469665A true CN116469665A (en) | 2023-07-21 |
Family
ID=87184523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310582616.3A Pending CN116469665A (en) | 2023-05-23 | 2023-05-23 | Vacuum paint dipping method for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116469665A (en) |
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2023
- 2023-05-23 CN CN202310582616.3A patent/CN116469665A/en active Pending
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