Vacuum impregnation method for a transformer

Abstract

The application discloses a vacuum impregnation method for a transformer, and the impregnation method comprises the following steps: step one, vacuumizing the inside of an impregnation cylinder; step two, sinking the impregnation cylinder into insulating paint until the ambient pressure is restored; step three, separating the impregnation cylinder from the insulating paint, vacuumizing, and forming a drainage channel between the insulating paint in the transformer and the transformer; step four, sinking the impregnation cylinder into the insulating paint, vacuumizing for 2-3 minutes, and then making the insulating paint flow into the drainage channel; step five, separating the impregnation cylinder from the insulating paint, vacuumizing after the ambient pressure is restored, and then vacuumizing until the ambient pressure is restored; step six, sinking the impregnation cylinder into the insulating paint, vacuumizing for 2-4 minutes, and then taking out the transformer after the ambient pressure is restored. The application provides a vacuum impregnation method for a transformer, a negative pressure environment is formed in the transformer, the insulating paint is beneficial to flowing into the transformer, the drainage channel in the transformer is beneficial to forming through cyclic vacuumizing, and the filling degree of the insulating paint is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of transformer vacuum impregnation. BACKGROUND

[0002] China has vast land, and the five basic terrain types on land are distributed in China, and the altitude covers a wide range, and the temperature and humidity of the climate in each place have their own characteristics, which brings great challenges to the national power engineering. In order to meet the use conditions in various altitudes, climates and other environments, the state grid has specified a unified standard for the transformer of the 5G intelligent electric meter, which requires that the 5G intelligent transformer product needs to pass the double-85 one-thousand-hour experiment of temperature 85 humidity 85. In order to achieve a more reliable product, the product requirement will be increased to temperature 85 humidity 95 one-thousand-hour experiment. Due to the complex internal structure of the high-frequency transformer, the conventional vacuum cannot completely remove the air inside the product, and after the experiment, the internal air expands to form a gap, causing moisture to enter the internal part of the transformer and cause product defects. Therefore, the original vacuum process needs to be improved to reduce the generation of gaps. SUMMARY

[0003] The purpose of the present application is to overcome the shortcomings of the prior art, and provide a transformer vacuum impregnation method. By forming a negative pressure environment inside the transformer, it is beneficial for the insulating paint to flow into the inside of the transformer, and by circulating and re-evacuating, it is beneficial for the formation of the drainage channel inside the transformer, effectively improving the filling degree of the insulating paint filled into the inside of the transformer.

[0004] Technical scheme: In order to achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0005] A transformer vacuum impregnation method, the impregnation method is:

[0006] Step one: place the transformer in the impregnation cylinder, then put the impregnation cylinder into the insulating paint box, and make the impregnation cylinder above the insulating paint in the insulating paint box, the inside of the impregnation cylinder is communicated with the negative pressure device, and the vacuum operation is carried out;

[0007] Step two: the negative pressure device suspends the vacuum, then the lifting device in the bottom of the insulating paint box drives the impregnation cylinder to sink into the insulating paint, the insulating paint enters and exits the impregnation cylinder through the communication groove opened on the side wall of the impregnation cylinder, until the inside of the impregnation cylinder restores to the environmental pressure;

[0008] Step three: the lifting device drives the impregnation cylinder to separate from the insulating paint, the communication groove is closed, then the negative pressure device is evacuated, and is kept for 1-2 minutes, so as to form a drainage channel between the insulating paint filled into the inside of the transformer and the inside of the transformer in step two;

[0009] Step four: the lifting device drives the impregnation cylinder to sink into the insulating paint, the insulating paint enters the impregnation cylinder through the communication groove, and the negative pressure device is vacuumed for 2-3 minutes, and then the insulating paint flows into the drainage channel;

[0010] Step five: the lifting device drives the impregnation cylinder to separate from the insulating paint, and after the impregnation cylinder returns to the ambient pressure, the communication groove is closed, the negative pressure device is vacuumed for 2-3 minutes, and then the communication groove is opened until the impregnation cylinder returns to the ambient pressure;

[0011] Step six: the lifting device drives the impregnation cylinder to sink into the insulating paint, and the negative pressure device stops after being vacuumed until the impregnation cylinder returns to the ambient pressure, and then the transformer is taken out of the impregnation cylinder.

[0012] Further, the vacuum degree in the impregnation cylinder is -0.08 to -0.1 Mpa, and the vacuum degree in the impregnation cylinder in steps five and six is greater than that in the impregnation cylinder in steps two, three and four.

[0013] Further, the viscosity of the insulating paint in the insulating paint box is 25-30 S.

[0014] Further, a guide chute is formed on the inner wall of the insulating paint box, the top of the guide chute is open, and the bottom of the guide chute is spaced apart from the bottom surface of the insulating paint box; guide clamping plates are fixed on the bottoms of the two sides of the impregnation cylinder, the guide clamping plates are embedded in the guide chute on the side away from the impregnation cylinder, the lifting device includes a lifting shaft, the bottom driving device of the insulating paint box is drivingly connected with the bottom end of the lifting shaft, and the top end of the lifting shaft is detachably installed with the bottom of the impregnation cylinder; the lifting shaft can drive the impregnation cylinder to separate upward from the guide chute.

[0015] Further, the impregnation cylinder includes a corresponding cylinder and a bottom plate which can be separately arranged with the corresponding cylinder, a fitting groove is formed in the side wall of the corresponding cylinder, the fitting groove is arranged around the edge track of the corresponding cylinder, and the bottom of the fitting groove is throughly arranged as a spigot; embedded plate bodies are fixed on the surface edges of the bottom plate, a plurality of embedded plate bodies are annularly spliced and fixed to form a closed ring plate, and the closed ring plate is embedded in the fitting groove through the spigot; when the bottom plate is combined with the corresponding cylinder, the closed ring plate is embedded in the top position of the impregnation cylinder, and the impregnation cylinder formed by the bottom plate and the corresponding cylinder is communicated with the negative pressure device on the side wall of the insulating paint box through the guide pipe.

[0016] Further, the top of the lifting shaft is detachably installed with the bottom plate, the bottom of the guide sliding groove is provided with a matched telescopic rod, the bottom end of the matched telescopic rod is drivingly connected with the bottom driving device of the insulating paint box, and the top end of the matched telescopic rod is detachably installed with the bottom of the guide clamping plate.

[0017] Further, the communication groove comprises first communication openings and second communication openings, a plurality of the first communication openings are oppositely arranged on the sidewalls at the top of the paint immersion cylinder, the first communication openings penetrate the embedded groove, the interior of the paint immersion cylinder is communicated with the interior of the insulating paint box through the first communication openings, the first communication openings are closed when the closed ring plate is embedded into the top of the paint immersion cylinder, the second communication openings are penetrated on the sidewall at the bottom of the embedded plate, and the embedded groove closes the second communication openings; when the bottom plate drives the closed ring plate to be separated from the bottom of the corresponding cylinder out of the embedded groove, the first communication openings are opened, and the second communication openings are opened when the bottom plate drives the closed ring plate to be continuously separated out of the embedded groove.

[0018] Further, a sliding ring groove is arranged 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 on the top of the rotating ring plate, and a transformer is placed on the placing plate; when the first communication openings are opened, the driving device drives the lifting shaft to rotate the rotating ring plate, the rotating ring plate drives the transformer to rotate through the placing plate, and the guide clamping plate limits the circumferential direction of the paint immersion cylinder at this time.

[0019] Beneficial effects: the interior of the transformer in the application is a negative pressure environment, the insulating paint can flow into the interior of the transformer more easily, the insulating paint is filled into the transformer more deeply, when a part of the insulating paint is in the gap in the interior of the transformer, the air in the transformer is gradually moved outward when the interior of the paint immersion cylinder is vacuumized, so that the product is separated from the insulating paint (since the viscosity of the insulating paint is large, the insulating paint cannot be effectively sucked into the interior of the product directly in the vacuum in the insulating paint), the end sealing part of the insulating paint is made to enter the interior of the transformer to form a drainage channel through vacuumization again, and then the insulating paint can flow into the interior of the transformer quickly and sufficiently, which is beneficial to the filling of the subsequent insulating paint; and the vacuumization again ensures that the drainage channel is not closed before the insulating paint flows into the drainage channel, so that the normal flow of the drainage channel is ensured, the insulating paint flows in, and the filling degree of the insulating paint is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] ATTACHMENT Figure 1 is a paint immersion method step diagram;

[0021] ATTACHMENT Figure 2 is an insulating paint box structure diagram;

[0022] Appendix Figure 3 This is a structural diagram of the paint dipping tank;

[0023] Appendix Figure 4 Here is a structural diagram of the lifting shaft;

[0024] Appendix Figure 5 This is the corresponding cylinder block structure diagram;

[0025] Appendix Figure 6 This is a diagram of a closed-loop plate structure. Detailed Implementation

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] As attached Figures 1-6 A vacuum impregnation method for a transformer, the impregnation method being as follows:

[0028] Step 1: A sealing cover can be installed on the insulating varnish box. The transformer is placed in the varnish impregnation tank 1, and then the varnish impregnation tank 1 is placed inside the insulating varnish box 2, with the varnish impregnation tank 1 positioned above the insulating varnish inside the insulating varnish box 2. The sealing cover is closed. The interior of the varnish impregnation tank 1 is connected to the negative pressure device 3 to perform a vacuum operation. This creates a vacuum environment inside the transformer, making it easier for the insulating varnish to fill the transformer's interior when the transformer is submerged in the insulating varnish, thus improving the filling effect inside the transformer.

[0029] Step 2: The negative pressure device 3 pauses the vacuuming process. At this time, the vacuum level is -0.08 (excessive vacuum will lower the temperature and increase the viscosity of the insulating varnish). Then, the lifting device at the bottom of the insulating varnish box 2 drives the impregnation tank 1 to sink into the insulating varnish. The insulating varnish enters and exits the impregnation tank 1 through the connecting groove 11 opened on the side wall of the impregnation tank 1 until the impregnation tank 1 returns to the ambient air pressure. The transformer is in a negative pressure environment, which makes it easier for the insulating varnish to flow into the transformer, promoting deeper filling of the transformer and effectively improving the filling degree.

[0030] Step 3: The lifting device pulls the impregnation tank 1 out of the insulating varnish, the connecting groove 11 is closed, and then the negative pressure device 3 performs vacuuming to a vacuum degree of -0.08 and maintains it for 1-2 minutes. The pressure difference causes the insulating varnish filled into the transformer in Step 2 to form a flow channel between the insulating varnish and the transformer interior. The insulating varnish at the end of the product in the previous process will flow with the gaps inside the product. Although it cannot fill the product interior, it can form a flow channel for the insulating varnish (because the insulating varnish has a high viscosity, if a higher vacuum degree is required if a vacuum is directly drawn in the previous process, the viscosity of the insulating varnish will increase. It is not possible to effectively draw the insulating varnish into the product interior in a short time. Therefore, the lifting platform needs to be lifted to remove the insulating varnish in order to reduce the resistance of the insulating varnish and facilitate the discharge of residual air). This is beneficial for the filling of the insulating varnish in Step 4.

[0031] Step four: the lifting device drives the impregnation cylinder 1 to sink into the insulating paint, the insulating paint enters the impregnation cylinder 1 through the communication groove 11, and the negative pressure device 3 keeps vacuumizing to a vacuum degree of-0.08, and keeps for 2-3 minutes, and the insulating paint flow flows along the drainage channel; The reason for keeping vacuumizing for a period of time is to ensure that the insulating paint can always flow along the drainage channel when the insulating paint flows into the drainage channel (the previously filled insulating paint can form an insulating paint track, and the subsequent insulating paint can flow along the insulating paint track, which facilitates the filling of the insulating paint into the transformer through the drainage channel);

[0032] Step five: the lifting device drives the impregnation cylinder 1 to separate from the insulating paint, and after the impregnation cylinder 1 returns to the ambient pressure, the communication groove 11 is closed, the negative pressure device 3 is vacuumized and reaches a vacuum degree of-0.09, and then the communication groove 11 is opened again after keeping for 2-3 minutes, until the impregnation cylinder 1 returns to the ambient pressure; After the product separates from the insulating paint, the resistance is reduced, the insulating paint can be fully filled into the product after increasing the vacuum degree, and the residual air is easily discharged, and the vacuumizing operation is performed again, which is beneficial to the continuous formation of the drainage channel, and the insulating paint can more easily fill into the transformer through the drainage channel when the transformer sinks into the insulating paint, thereby improving the filling degree;

[0033] Step six: the lifting device drives the impregnation cylinder 1 to sink into the insulating paint, and the negative pressure device 3 stops after vacuumizing to a vacuum degree of-0.1, and the insulating paint gradually fills the gap part of the end part of the transformer (the insulating paint in the end part after the previous process will enter the product, and a small amount of gap is left in the end part, which facilitates the flow of the insulating paint), and the vacuumizing is to ensure that the insulating paint can flow more smoothly along the drainage channel, and the insulating paint flows into the transformer, until the impregnation cylinder 1 returns to the ambient pressure, and then the sealing cover is opened, and then the transformer is taken out from the impregnation cylinder 1, so that the impregnation is completed, and after the transformer is dried, the internal insulating paint and the product form an integral whole, which is basically seamless, high humidity cannot enter the product, and it can pass the double 85-1000 hour experiment and meet the requirements of the State Grid.

[0034] The vacuum degree in the impregnation cylinder 1 is-0.08~ -0.1Mpa, and the vacuum degree in the impregnation cylinder 1 in steps five and six is greater than that in the impregnation cylinder 1 in steps two, three and four. It can ensure that there is enough pressure difference to form the drainage channel, and it can also ensure that the drainage channel is not easy to close, which facilitates the flow of the insulating paint, and the insulating paint can fully fill the product after increasing the vacuum degree, and the residual air is easily discharged, and the viscosity of the insulating paint in the insulating paint box 2 is 25-30S, which ensures that the insulating paint can be under the condition of-0.1 vacuum degree.

[0035] The guiding sliding groove 21 is provided on the inner wall of the insulating paint box 2, the top of the guiding sliding groove 21 is open, and the bottom of the guiding sliding groove 21 is spaced apart from the bottom surface of the insulating paint box 2; the guiding clamping plates 12 are fixed on the bottom of the two sides of the paint immersion cylinder 1, the guiding clamping plates 12 are embedded in the guiding sliding groove 21 away from the paint immersion cylinder 1, the lifting device comprises a lifting shaft 4, the bottom driving device of the insulating paint box 2 is drivingly connected with the bottom end of the lifting shaft 4, and the top end of the lifting shaft 4 is detachably installed with the bottom of the paint immersion cylinder 1; the lifting shaft 4 can drive the paint immersion cylinder 1 to be separated upward from the guiding sliding groove 21. The guiding clamping plate is clamped in the guiding sliding groove, then the paint immersion cylinder is installed into the insulating paint box along the guiding sliding groove, the top of the guiding sliding groove is open, the paint immersion cylinder can be conveniently detached as a whole, the lifting shaft and the paint immersion cylinder are detachably installed, the operation is convenient, and the paint immersion cylinder can be conveniently immersed in the insulating paint or separated from the insulating paint, so that the transformer is conveniently immersed in the paint.

[0036] The paint immersion cylinder 1 comprises a corresponding cylinder 13 and a bottom plate 14 which is detachably arranged with the corresponding cylinder 13, the side wall of the corresponding cylinder 13 is provided with an embedded groove 131, the embedded groove 131 is arranged along the edge track of the corresponding cylinder 13, the bottom of the embedded groove 131 is provided with a through hole, which is an embedded opening 132, the surface edge of the bottom plate 14 is fixedly provided with embedded plate bodies 141, a plurality of embedded plate bodies 141 are annularly spliced and fixed to form a closed ring plate 142, and the closed ring plate 142 is embedded in the embedded groove 131 through the embedded opening 132; when the bottom plate 14 and the corresponding cylinder 13 are combined, the closed ring plate 142 is embedded in the top position of the paint immersion cylinder 1, and the paint immersion cylinder 1 formed by the bottom plate 14 and the corresponding cylinder 13 is communicated with the negative pressure device 3 on the side wall of the insulating paint box 2 through the conduit 31. The corresponding cylinder, the bottom plate and the closed ring plate are combined to form the paint immersion cylinder, so that a closed space is formed in the paint immersion cylinder, the vacuumizing operation of the negative pressure device is facilitated, the transformer can be conveniently loaded into the paint immersion cylinder, the paint immersion cylinder can be easily immersed in the insulating paint or separated from the insulating paint during the paint immersion operation, the filling degree of the insulating paint is improved, a vacuum environment is ensured in the paint immersion cylinder, a negative pressure is formed in the transformer, the insulating paint flows into the transformer, the relative sliding movement of the bottom plate and the corresponding cylinder can conveniently open and close the communication groove, the inflow and outflow of the insulating paint are facilitated, the paint immersion operation can be conveniently performed for multiple times, and the insulating paint is filled into the transformer.

[0037] The lifting shaft 4 top and the bottom plate 14 bottom are detachable installation, the guide chute 21 bottom position has the cooperation telescopic rod 22, the insulation paint tank 2 bottom drive device and the cooperation telescopic rod 22 bottom end drive connection, the cooperation telescopic rod 22 top and the guide clamping plate 12 bottom are detachable installation;The lifting shaft 4 and cooperation telescopic rod 22 cooperate, gradually make the bottom plate 14 and the corresponding cylinder 13 between gradually separate, and the interval in the inside of the paint dipping cylinder 1 can be adjusted to increase or decrease.Combination telescopic rod is driven by guide clamping plate and corresponding cylinder is lifted, lifting shaft drives bottom plate to descend, so that bottom plate and corresponding cylinder are separated, and closed ring plate gradually separates out from the embedded groove, the size of the interval in the inside of the paint dipping cylinder can be adjusted, when the interval increases, the negative pressure difference in the inside of the paint dipping cylinder can be increased, which is beneficial to the insulation paint flowing into the paint dipping cylinder through the communication groove, and the insulation paint is filled into the gap in the inside of the transformer, when the interval in the inside of the paint dipping cylinder decreases, the insulation paint can be extruded, which promotes the insulation paint flowing into the inside of the transformer;During the process of continuously increasing or decreasing the interval in the inside of the paint dipping cylinder, the vibration of the insulation paint can be caused, which is beneficial to the flow of the insulation paint, especially the insulation paint filled into the inside of the transformer can form resonance effect in the inside of the transformer, which is beneficial to the flow of the insulation paint, promotes the insulation paint to flow into the inside of the transformer more deeply, and improves the filling degree of the insulation paint.

[0038] The communication groove 11 includes first communication port 111 and second communication port 112, a plurality of first communication ports 111 are oppositely provided on the top of the paint dipping cylinder 1, the first communication port 111 penetrates the embedded groove 131, the inside of the paint dipping cylinder 1 is communicated with the inside of the insulation paint tank 2 through the first communication port 111, when the closed ring plate 142 is embedded into the top of the paint dipping cylinder 1, the first communication port 111 is closed;The second communication port 112 is provided on the bottom side wall of the embedded plate body 141, the embedded groove 131 closes the second communication port 112;When the bottom plate 14 drives the closed ring plate 142 to separate from the corresponding cylinder 13 bottom out of the embedded groove 131, the first communication port 111 is opened, the bottom plate 14 drives the closed ring plate 142 to continue to separate out of the embedded groove 131, and the second communication port 112 is opened.When the paint dipping cylinder is immersed in the insulation paint, the first communication port is opened, and then the insulation paint flows into the paint dipping cylinder from top to bottom, and the insulation paint is sprayed onto the transformer, the downward flowing insulation paint has greater force than the upward flowing insulation paint, which is beneficial to the insulation paint extruding into the gap of the transformer, and the effect of the negative pressure in the inside of the transformer can be more beneficial to the insulation paint filled into the inside of the transformer;When the paint dipping cylinder separates from the insulation paint, the second communication port is opened, the insulation paint flows out to the inside of the insulation paint tank through the second communication port, which is convenient for subsequent vacuum operation in the paint dipping cylinder;

[0039] The middle part of the bottom plate 14 is provided with a sliding ring groove 143, and the rotating ring plate 144 is embedded and arranged in the sliding ring groove 143, and the rotating ring plate 144 is detachably connected with the top of the lifting shaft 4; the top of the rotating ring plate 144 is fixedly provided with a placing plate 145, and the 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, and the rotating ring plate 144 drives the transformer to rotate through the placing plate 145, and at this time, the guide clamping plate 12 forms a limiting action on the circumferential direction of the paint immersion cylinder 1; when the transformer is immersed in 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 itself and the internal insulating paint can form a slight spin force, causing the vibration of the internal insulating paint of the transformer, promoting the flow of the insulating paint in the internal transformer, and after the vacuumizing operation, the insulating paint can be filled into the internal transformer more deeply, thereby improving the filling degree of the insulating paint.

[0040] The above is only the preferred embodiment of the present application, and is not used to limit the present application, and for those skilled in the art, some improvements and changes can be made without departing from the above principles of the present application, and these improvements and changes are also considered to be within the protection scope of the present application.

Claims

1. A vacuum impregnation method for a transformer, characterized by, The impregnation method is: Step one: place the transformer in the impregnation cylinder (1), then put the impregnation cylinder (1) into the insulating paint box (2), and make the impregnation cylinder (1) above the insulating paint in the insulating paint box (2), the inside of the impregnation cylinder (1) is communicated with the negative pressure device (3), and the vacuumizing operation is carried out; Step two: the negative pressure device (3) stops vacuumizing, then the lifting device in the bottom of the insulating paint box (2) drives the impregnation cylinder (1) to sink into the insulating paint, the insulating paint enters or exits the impregnation cylinder (1) through the communication groove (11) opened on the side wall of the impregnation cylinder (1), until the inside of the impregnation cylinder (1) restores to the environmental air pressure; Step three: the lifting device drives the impregnation cylinder (1) to separate from the insulating paint, the communication groove (11) is closed, then the negative pressure device (3) carries out vacuumizing, and keeps for 1-2 minutes, so as to promote the insulating paint filled in the inside of the transformer in step two to form a drainage channel between the inside of the transformer; Step four: the lifting device drives the impregnation cylinder (1) to sink into the insulating paint, the insulating paint enters the impregnation cylinder (1) through the communication groove (11), and the negative pressure device (3) carries out vacuumizing, and keeps for 2-3 minutes, so that the insulating paint flows into the drainage channel; Step five: the lifting device drives the impregnation cylinder (1) to separate from the insulating paint, after the impregnation cylinder (1) restores to the environmental air pressure, the communication groove (11) is closed, the negative pressure device (3) carries out vacuumizing, and keeps for 2-3 minutes, then the communication groove (11) is opened, until the inside of the impregnation cylinder (1) restores to the environmental air pressure; Step six: the lifting device drives the impregnation cylinder (1) to sink into the insulating paint, the negative pressure device (3) stops vacuumizing, until the inside of the impregnation cylinder (1) restores to the environmental air pressure, then the transformer is taken out from the impregnation cylinder (1); The impregnation cylinder (1) comprises a corresponding cylinder (13) and a bottom plate (14) which can be arranged separately from the corresponding cylinder (13); the side wall of the corresponding cylinder (13) is provided with an embedded groove (131), and the bottom of the embedded groove (131) is provided as an embedded opening (132); the surface edge of the bottom plate (14) is fixedly provided with embedded plate bodies (141), a plurality of embedded plate bodies (141) are annularly spliced and fixed to form a closed ring plate (142); the surface edge of the bottom plate (14) is fixedly provided with a closed ring plate (142), and the closed ring plate (142) is embedded into the embedded groove (131) through the embedded opening (132); the bottom plate (14) and the corresponding cylinder (13) form the impregnation cylinder (1) which is communicated with the negative pressure device (3); The top of the lifting shaft (4) is detachably installed with the bottom of the bottom plate (14); the bottom of the impregnation cylinder (1) is fixedly provided with a guide clamping plate (12), the top of the telescopic rod (22) is detachably installed with the bottom of the guide clamping plate (12); the lifting shaft (4) cooperates with the telescopic rod (22), so that the bottom plate (14) and the corresponding cylinder (13) are gradually separated, and the interval of the impregnation cylinder (1) can be adjusted to increase or decrease; When the interval inside the impregnating cylinder body increases, the negative pressure difference inside the impregnating cylinder body can be increased correspondingly, and when the interval inside the impregnating cylinder body decreases, the insulation paint can be extruded; in the process of continuously increasing and decreasing the interval inside the impregnating cylinder body, the vibration of the insulation paint can be caused to promote the deeper flow of the insulation paint into the transformer.

2. A process for vacuum impregnation of a transformer according to claim 1, characterized in that: The vacuum degree in the impregnating cylinder body (1) is -0.08 to -0.1 Mpa, and the vacuum degree in the impregnating cylinder body (1) in steps five and six is greater than the vacuum degree in the impregnating cylinder body (1) in steps two, three and four.

3. A method of vacuum impregnation of a transformer according to claim 2, characterized in that: The viscosity of the insulation paint in the insulation paint box body (2) is 25-30 S.

4. A method of vacuum impregnation of a transformer according to claim 3, characterized in that: The guiding sliding groove (21) is provided on the inner wall of the insulation paint box body (2), the top of the guiding sliding groove (21) is open, and the bottom of the guiding sliding groove (21) is spaced apart from the bottom surface of the insulation paint box body (2); the guiding sliding groove (21) is embedded in the guiding sliding groove (21) on the side away from the impregnating cylinder body (1), the lifting device comprises a lifting shaft (4), the bottom driving device of the insulation paint box body (2) is drivingly connected with the bottom end of the lifting shaft (4), and the top end of the lifting shaft (4) is detachably installed with the bottom of the impregnating cylinder body (1); the lifting shaft (4) can drive the impregnating cylinder body (1) to be separated from the guiding sliding groove (21) upwards.

5. A method of vacuum impregnation of a transformer according to claim 4, characterized in that: The bottom of the guiding sliding groove (21) is provided with the matching telescopic rod (22), and the bottom driving device of the insulation paint box body (2) is drivingly connected with the bottom end of the matching telescopic rod (22).

6. A method of vacuum impregnating a transformer according to claim 5, characterized in that: The communicating groove (11) comprises a first communicating port (111) and a second communicating port (112), a plurality of first communicating ports (111) are oppositely provided on the top sidewalls of the impregnating cylinder body (1), the first communicating port (111) penetrates the embedded groove (131), the inside of the impregnating cylinder body (1) is communicated with the inside of the insulation paint box body (2) through the first communicating port (111), and the first communicating port (111) is closed when the embedded ring plate (142) is embedded into the top position of the impregnating cylinder body (1); the second communicating port (112) is penetratingly provided on the bottom sidewall of the embedded plate body (141), and the embedded groove (131) closes the second communicating port (112); when the bottom plate (14) drives the embedded ring plate (142) to be separated from the bottom of the corresponding cylinder (13) out of the embedded groove (131), the first communicating port (111) is opened, the bottom plate (14) drives the embedded ring plate (142) to continue to be separated out of the embedded groove (131), and the second communicating port (112) is opened.

7. A method of vacuum impregnation of a transformer according to claim 6, characterized in that: The middle part of the bottom plate (14) is provided with a sliding ring groove (143), and a rotating ring plate (144) is embedded in the sliding ring groove (143) and detachably connected with the top of the lifting shaft (4); the top of the rotating ring plate (144) is fixedly provided with a placing plate (145), and the 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 rotate the rotating ring plate (144), the rotating ring plate (144) drives the transformer to rotate through the placing plate (145), and the guide clamping plate (12) limits the circumferential direction of the paint immersion cylinder (1) at this time.

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