CN114792596A - Transformer insulation packaging structure and packaging method - Google Patents

Transformer insulation packaging structure and packaging method Download PDF

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Publication number
CN114792596A
CN114792596A CN202210227205.8A CN202210227205A CN114792596A CN 114792596 A CN114792596 A CN 114792596A CN 202210227205 A CN202210227205 A CN 202210227205A CN 114792596 A CN114792596 A CN 114792596A
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CN
China
Prior art keywords
groove
insulating block
block
annular groove
insulation block
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Withdrawn
Application number
CN202210227205.8A
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Chinese (zh)
Inventor
孙彩霞
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Lujiang Zhaorun Electronics Co ltd
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Lujiang Zhaorun Electronics Co ltd
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Priority to CN202210227205.8A priority Critical patent/CN114792596A/en
Publication of CN114792596A publication Critical patent/CN114792596A/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • 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
    • 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
    • H01F41/02—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 for manufacturing cores, coils, or magnets
    • H01F41/04—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 for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/12—Insulating of windings
    • H01F41/125—Other insulating structures; Insulating between coil and core, between different winding sections, around the coil

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Of Coils (AREA)

Abstract

The invention relates to a transformer insulation packaging structure and a packaging method thereof.A pre-formed upper insulation block and a pre-formed lower insulation block are utilized, contents are sequentially installed, the assembly is convenient, the problems in the installation process can be easily observed in time, the timely remedial measures can be conveniently carried out, an injection hole is reserved, and insulating materials are poured for the second time, so that the upper insulation block and the lower insulation block form a whole, the installation and the molding are easy, and the insulativity is good; according to the packaging method of the transformer insulation packaging structure, in the processing process of the upper insulation block and the lower insulation block, the vibration effect of the component vibrating table on the upper insulation block and the lower insulation block is adopted, the effect of quickly removing air bubbles in the upper insulation block and the lower insulation block is facilitated before the upper insulation block and the lower insulation block are molded, the mode of pouring the insulation material for the second time is adopted, the upper insulation block and the lower insulation block are made to form a whole, the effect of removing the air bubbles is achieved by adopting the secondary vibration effect, the insulation property is good, and the operation is easy.

Description

Transformer insulation packaging structure and packaging method
Technical Field
The invention belongs to the technical field of transformer packaging, and particularly relates to a transformer insulation packaging structure and a packaging method.
Background
The conventional insulation packaging method for small transformer includes steps of firstly adhering (welding) transformer contents such as iron core wound with coil with lead and a plurality of pins, positioning the pins through related jigs, fixing the iron core and the coil with a layer of glue, finally sealing the contents with upper and lower dies, and only exposing a part of the pins to the packaged substance.
After the mould is molded, injecting an insulating substance into the surrounding space in the mould, cooling and demoulding, wherein the insulating substance completely wraps the contents, and only one part of the exposed pin is connected with an external circuit; the pins are convenient for connecting with external circuits, and the exposed pins are usually bent by tool processing.
By search, chinese patent publication No. CN100364020C, "a transformer insulation packaging structure and method", discloses a transformer insulation packaging structure and method for wrapping the contents of a transformer to generate insulation effect, and positioning the exposed pins; the method of the invention is that the content of the transformer is jointed with the connecting pin by the lead wire, then the upper and the lower moulds are used for sealing, and part of the connecting pin is exposed, then the insulating material is injected into the space sealed by the moulds, wherein, the maximum area of the top surface of the lower mould extends a platform from the space sealed by the moulds to the direction of the content of the transformer, the position of the platform is higher than the horizontal plane of the sealing position of the two moulds and lower than the content of the transformer, after the moulds are demoulded, the insulating material wraps the content of the transformer, the lead wire and the connecting pin to form an insulating layer, a part of the bottom surface of the insulating layer is hollowed out, and a layer of insulating glue with density lower than that of the insulating layer is applied at the hollowed-out position, so that the transformer can not generate the burst phenomenon due to complete sealing when passing through a tin furnace (SMT); however, the method of injection molding with one-step mold is not convenient for targeted replacement and maintenance, and air is easy to remain in the insulating material, which affects the overall insulation of the transformer, and the transformer is difficult to be assembled quickly.
Disclosure of Invention
The present invention is directed to a transformer insulation package structure and a transformer insulation package method for solving the above problems.
The invention realizes the purpose through the following technical scheme:
a transformer insulation packaging structure comprises an iron core, a coil, a lead wire, a pin, an upper insulation block and a lower insulation block, wherein the upper surface of the lower insulation block is provided with a positioning groove and a first annular groove which is positioned at the inner side of the positioning groove and is used for the iron core to pass through, an overflow groove is arranged between the positioning groove and the outer ring of the first annular groove, the bottom of the positioning groove is provided with a through hole for the pin to pass through, the inner side of the first annular groove is provided with a cylindrical groove, the central position of the bottom of the upper insulation block is provided with a boss part for the cylindrical groove to pass through, the outer side of the boss part is provided with a positioning block for the positioning groove to pass through, the central position of the boss part is provided with an injection molding hole, the inlet end of the injection molding hole is provided with a sealed injection molding plug, the upper insulation block and the lower insulation block are both provided with mounting holes, screw rods are arranged in the mounting holes, and the outer side wall of the positioning groove is provided with an overflow through hole, the heat-sensitive memory layer is characterized in that a heat-absorbing expansion heat-sensitive memory layer is arranged in the positioning groove and is made of shape memory plastic, the heat-sensitive memory layer comprises a base layer, a plurality of groups of convex strips are arranged on the outer surface of the base layer, a plurality of groups of corners are formed on the convex strips, and spherical bulges are formed at the end parts of the convex strips.
As a further optimization scheme of the invention, the coil is uniformly wound on the iron core, the coil is connected with the pins through the leads, and the leads are positioned and clamped in the overflow groove, so that the assembly of the leads is easy to realize.
As a further optimization scheme of the invention, the positioning grooves are symmetrically arranged about the central axis of the first annular groove, the lower surface of the upper insulating block is provided with a second annular groove matched with the first annular groove in shape, and the first annular groove and the second annular groove are butted into a whole and are just matched with the shape of the iron core.
As a further optimization scheme of the invention, the height of the convex part is less than the depth of the cylindrical groove, and the convex part and the upper insulating block form an integrated structure, so that a space is easily formed at the bottom of the cylindrical groove, and the flowing injection molding of insulating substances is facilitated.
As a further optimization scheme of the invention, the inner surfaces of the positioning groove, the first annular groove, the overflow groove, the cylindrical groove and the second annular groove are all provided with rubber layers, so that the sealing insulativity is good.
As a further optimization scheme of the invention, the packaging method of the transformer insulation packaging structure comprises the following steps:
s1, injecting an insulating substance into the upper mold and the lower mold, vibrating, maintaining, and finally demolding to form an upper insulating block and a lower insulating block;
s2, the pins penetrate through the inner part of the through holes in the upper insulating block, meanwhile, the iron core is positioned and installed in the first annular groove, and at the moment, the coil on the iron core and the pins are welded and fixed by using the leads and a welding technology, so that the iron core, the coil, the leads and the pins form a whole;
s3, positioning and clamping the upper insulating block on the lower insulating block, and enabling the screw to penetrate through the mounting hole, so that the upper insulating block and the lower insulating block are installed in a contraposition mode, at the moment, the positioning block is positioned in the positioning groove, and the second annular groove is clamped on the iron core, so that the fixing effect of the iron core and the pins is achieved;
and S4, finally, injecting the insulating material into the cylindrical groove through the injection molding hole, wherein the insulating material can penetrate through a gap between the first annular groove and the second annular groove and is injected into the positioning groove along the overflow groove after the cylindrical groove is filled with the insulating material along with the continuous injection molding of the insulating material, and after the injection of the positioning groove is finished, the insulating material is trimmed, vibrated, maintained and finally formed into a whole.
As a further optimization scheme of the present invention, in steps S1 and S4, the oscillation uses a component vibration table with a model ZDP1000 × 1000 for vibrating the whole formed by the mold and the upper and lower insulating blocks to remove the excess air bubbles in the upper and lower insulating blocks.
As a further preferred embodiment of the present invention, in step S4, when the insulating material overflows from the overflow through hole, it indicates that the gaps and cavities inside the upper and lower insulating blocks are completely filled, i.e. the upper and lower insulating blocks are integrally formed.
The invention has the beneficial effects that:
this transformer insulation packaging structure utilizes preformed upper and lower collets to install the content in proper order, the equipment is convenient, and easily observes the problem that appears in the installation in time, is convenient for carry out timely remedial measure, reserves the hole of moulding plastics, adopts the secondary to water insulating material, makes upper and lower collets form a whole, easily installation shaping, and insulating nature is good.
According to the packaging method of the transformer insulation packaging structure, in the processing process of the upper insulation block and the lower insulation block, the vibration effect of the component vibrating table on the upper insulation block and the lower insulation block is adopted, the effect of quickly removing air bubbles in the upper insulation block and the lower insulation block is facilitated before the upper insulation block and the lower insulation block are molded, the mode of pouring the insulation material for the second time is adopted, the upper insulation block and the lower insulation block are made to form a whole, the effect of removing the air bubbles is achieved by adopting the secondary vibration effect, the insulation property is good, and the operation is easy.
Drawings
FIG. 1 is a schematic front view of a detachable axial side structure of the insulation package structure of the present invention;
FIG. 2 is a schematic view of the lower insulating block of the present invention;
FIG. 3 is a schematic view of the main view axis structure of the lower insulating block and the connecting pin connection of the present invention;
FIG. 4 is a schematic view of the structure of the lower insulating block connected to the iron core on the main viewing axis side;
FIG. 5 is a schematic bottom view of the upper insulator block of the present invention;
FIG. 6 is a schematic front view of a closed axial-side structure of the insulation package structure of the present invention;
FIG. 7 is a front view of the thermal memory layer according to the present invention;
FIG. 8 is a front view of the thermal memory layer according to the present invention.
In the figure: 1. an iron core; 2. a coil; 3. a lead; 4. a pin; 5. an upper insulating block; 6. a lower insulating block; 7. positioning a groove; 8. a first annular groove; 9. overflowing out of the groove; 10. a through hole; 11. a cylindrical groove; 12. a boss portion; 13. positioning blocks; 14. injection molding holes; 15. sealing the injection molding plug; 16. mounting holes; 17. a screw; 18. an overflow via; 19. a second annular groove; 20. a thermosensitive memory layer; 2001. a base layer; 2002. a raised strip; 2003. a corner; 2004. and (4) a spherical bulge.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
As shown in fig. 1-2, an insulation packaging structure of a transformer comprises an iron core 1, a coil 2, a lead 3, a pin 4, an upper insulation block 5 and a lower insulation block 6, wherein the upper surface of the lower insulation block 6 is provided with a positioning groove 7 and a first annular groove 8 which is positioned inside the positioning groove 7 and is used for the iron core 1 to pass through, an overflow groove 9 is arranged between the positioning groove 7 and the outer ring of the first annular groove 8, the bottom of the positioning groove 7 is provided with a through hole 10 for the pin 4 to pass through, the inside of the first annular groove 8 is provided with a cylindrical groove 11, a boss 12 for the cylindrical groove 11 to pass through is formed at the center position of the bottom of the upper insulation block 5, a positioning block 13 for the positioning groove 7 to pass through is arranged at the outer side of the boss 12, an injection molding hole 14 is formed at the center position of the boss 12, an inlet end of the injection molding hole 14 is provided with a sealing injection plug 15, and mounting holes 16 are arranged in the upper insulation block 5 and the lower insulation block 6, a screw rod 17 is arranged in the mounting hole 16, and an overflow through hole 18 is arranged on the outer side wall of the positioning groove 7.
As shown in fig. 3-4, the coil 2 is uniformly wound on the iron core 1, the coil 2 is connected with the pin 4 through the lead 3, and the lead 3 is positioned and clamped in the overflow groove 9, so that the lead 3 is easily assembled. The positioning groove 7 is symmetrically arranged about the central axis of the first annular groove 8, the lower surface of the upper insulating block 5 is provided with a second annular groove 19 matched with the shape of the first annular groove 8, and the first annular groove 8 and the second annular groove 19 are butted into a whole and just coincide with the shape of the iron core 1. The height of the protruding part 12 is smaller than the depth of the cylindrical groove 11, the protruding part 12 and the upper insulating block 5 are of an integrated structure, a space is easily formed at the bottom of the cylindrical groove 11, and the flow injection molding of insulating materials is facilitated. The inner surfaces of the positioning groove 7, the first annular groove 8, the overflow groove 9, the cylindrical groove 11 and the second annular groove 19 are all provided with rubber layers, and the sealing insulation property is good.
As shown in fig. 7-8, a thermosensitive memory layer 20 which absorbs heat and expands is arranged in the positioning groove 7, the thermosensitive memory layer 20 is made of shape memory plastic, the thermosensitive memory layer 20 comprises a base layer 2001, a plurality of groups of convex strips 2002 are arranged on the outer surface of the base layer 2001, a plurality of groups of corners 2003 are formed on the convex strips 2002, and spherical protrusions 2004 are formed at the ends of the convex strips 2002.
The thermosensitive memory layer 20 is preferably a shape memory polymer plastic material, the shape memory polymer plastic material is composed of two raw materials with different deformation degrees at the same temperature, and when a certain temperature is exceeded, part of polymer crystals are melted and bent; after cooling, it returns to a stable crystalline state and becomes hard and fixed.
When insulating materials are injected into the injection molding hole 14, the heat generated by the insulating materials easily damages the contents of the transformer, when the heat of the insulating materials is transferred into the positioning groove 7 along the overflow groove 9, the thermosensitive memory layer 20 in the positioning groove 7 is heated to expand, the expanded base layer 2001 easily and quickly absorbs the heat in the transformer, so that the heat in the transformer can be quickly reduced, and the contents of the transformer can be prevented from being damaged by the heat, after the heat expansion, the convex strips 2002 become thick, the positions of the corners 2003 tend to become large, so that a certain ductility is formed in the positioning groove 7, the contact area between the convex strips 2002 and the insulating materials is increased, after the cooling, the convex strips 2002 generate prestress in the solidified insulating materials according to the spherical bulges 2004 arranged at the end parts of the convex strips 2002, the pre-stress tensioning effect is conveniently achieved, the reinforcing effect is achieved, the upper insulating block 5 and the lower insulating block 6 are prevented from being separated, and the influence of temperature on the content of the transformer is greatly reduced.
The invention also provides a packaging method of the transformer insulation packaging structure, which comprises the following steps:
s1, injecting an insulating substance into the upper and lower dies, vibrating, maintaining and finally demoulding to form an upper insulating block 5 and a lower insulating block 6;
s2, the pin 4 penetrates through the through hole 10 in the upper insulating block 5, meanwhile, the iron core 1 is positioned and installed in the first annular groove 8, at the moment, the coil 2 and the pin 4 on the iron core 1 are welded and fixed by the lead 3 and the welding technology, and the iron core 1, the coil 2, the lead 3 and the pin 4 are integrated;
s3, positioning and clamping the upper insulating block 5 on the lower insulating block 6, and enabling the screw 17 to penetrate through the mounting hole 16 to realize the alignment mounting of the upper insulating block 5 and the lower insulating block 6, wherein at the moment, the positioning block 13 is aligned in the positioning groove 7, and the second annular groove 19 is clamped on the iron core 1 to realize the fixing effect of the iron core 1 and the pin 4;
and S4, finally, injecting the insulating substance into the cylindrical groove 11 through the injection molding hole 14, wherein the insulating substance can penetrate through a gap between the first annular groove 8 and the second annular groove 19 and is injected into the positioning groove 7 along the overflow groove 9 after the cylindrical groove 11 is filled with the insulating substance along with the continuous injection molding of the insulating substance, and after the positioning groove 7 is completely injected, the insulating substance is trimmed, vibrated, maintained and finally formed into a whole.
In steps S1 and S4, a component tap table with model number ZDP1000 × 1000 is used to shake the mold and the whole formed by the upper insulating block 5 and the lower insulating block 6, and remove the excess air bubbles in the upper insulating block 5 and the lower insulating block 6.
In step S4, when the insulating material overflows from the overflow through hole 18, it indicates that the gaps and cavities inside the upper and lower insulating blocks 5 and 6 are completely filled, i.e., the upper and lower insulating blocks 5 and 6 are integrally formed.
Compared with the prior art, the transformer insulation packaging structure has the advantages that the pre-formed upper insulation block and the pre-formed lower insulation block are utilized, the contents are sequentially installed, the assembly is convenient, the problems occurring in the installation process are easy to observe in time, the timely remedial measures are convenient to carry out, the injection molding holes 14 are reserved, and the upper insulation block and the lower insulation block are integrally formed by secondary pouring of insulation materials, so that the transformer insulation packaging structure is easy to install and mold and good in insulation.
According to the packaging method of the transformer insulation packaging structure, in the processing process of the upper insulation block and the lower insulation block, the vibration effect of the component vibrating table on the upper insulation block and the lower insulation block is adopted, the effect of quickly removing air bubbles in the upper insulation block and the lower insulation block is facilitated before the upper insulation block and the lower insulation block are molded, the mode of pouring the insulation material for the second time is adopted, the upper insulation block and the lower insulation block are made to form a whole, the effect of removing the air bubbles is achieved by adopting the secondary vibration effect, the insulation property is good, and the operation is easy.
The above examples only show several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (8)

1. The utility model provides an insulating packaging structure of transformer, includes iron core (1), coil (2), lead wire (3), pin (4), goes up collets (5) and collets (6) down, its characterized in that: the upper surface of the lower insulating block (6) is provided with a positioning groove (7) and a first annular groove (8) which is positioned on the inner side of the positioning groove (7) and is used for an iron core (1) to penetrate through, an overflow groove (9) is arranged between the positioning groove (7) and the outer ring of the first annular groove (8), the bottom of the positioning groove (7) is provided with a through hole (10) for a pin (4) to penetrate through, the inner side of the first annular groove (8) is provided with a cylindrical groove (11), a bulge part (12) for the cylindrical groove (11) to penetrate through is formed at the central position of the bottom of the upper insulating block (5), a positioning block (13) for the positioning groove (7) to penetrate through is arranged on the outer side of the bulge part (12), an injection molding hole (14) is formed at the central position of the bulge part (12), the inlet end of the injection molding hole (14) is provided with a sealed injection molding plug (15), and mounting holes (16) are formed in the upper insulating block (5) and the lower insulating block (6), the heat-sensitive memory type LED lamp is characterized in that a screw (17) is arranged in the mounting hole (16), an overflow through hole (18) is formed in the outer side wall of the positioning groove (7), a heat-sensitive memory layer (20) which absorbs heat and expands is arranged in the positioning groove (7), the heat-sensitive memory layer (20) comprises a base layer (2001), a plurality of groups of convex strips (2002) are arranged on the outer surface of the base layer (2001), a plurality of groups of corners (2003) are formed on the convex strips (2002), and spherical protrusions (2004) are formed at the end parts of the convex strips (2002).
2. The insulation packaging structure of the transformer according to claim 1, wherein: the coil (2) is uniformly wound on the iron core (1), the coil (2) is connected with the pin (4) through the lead (3), and the lead (3) is positioned and clamped in the overflow groove (9).
3. The insulation packaging structure of the transformer according to claim 1, wherein: the locating groove (7) is symmetrically arranged about the central axis of the first annular groove (8), and the lower surface of the upper insulating block (5) is provided with a second annular groove (19) matched with the first annular groove (8) in shape.
4. The insulation packaging structure of the transformer according to claim 3, wherein: the height of the protruding part (12) is smaller than the depth of the cylindrical groove (11), and the protruding part (12) and the upper insulating block (5) are of an integrated structure.
5. The insulation packaging structure of the transformer according to claim 4, wherein: the inner surfaces of the positioning groove (7), the first annular groove (8), the overflow groove (9), the cylindrical groove (11) and the second annular groove (19) are all provided with rubber layers.
6. A method for encapsulating an insulating encapsulating structure according to any of claims 3 to 5, characterized in that: the method comprises the following steps:
s1, injecting an insulating substance into the upper and lower dies, vibrating, maintaining and finally demoulding to form an upper insulating block (5) and a lower insulating block (6);
s2, the pin (4) penetrates through the through hole (10) in the upper insulating block (5), meanwhile, the iron core (1) is positioned and installed in the first annular groove (8), at the moment, the coil (2) on the iron core (1) and the pin (4) are welded and fixed through the lead (3) and the welding technology, and the iron core (1), the coil (2), the lead (3) and the pin (4) are integrated;
s3, positioning and clamping the upper insulating block (5) on the lower insulating block (6), and enabling the screw (17) to penetrate through the mounting hole (16), so that the upper insulating block (5) and the lower insulating block (6) are installed in an aligned mode, at the moment, the positioning block (13) is aligned in the positioning groove (7), the second annular groove (19) is clamped on the iron core (1), and the iron core (1) and the pins (4) are fixed;
s4, finally, injecting the insulating material into the cylindrical groove (11) through the injection molding hole (14), wherein the insulating material can penetrate through a gap between the first annular groove (8) and the second annular groove (19) after being filled in the cylindrical groove (11) along with the continuous injection molding of the insulating material, and is injected into the positioning groove (7) along the overflow groove (9), and after the injection of the positioning groove (7) is finished, the insulating material is trimmed, vibrated, maintained and finally formed into a whole.
7. The packaging method of the transformer insulation packaging structure according to claim 6, wherein: in steps S1 and S4, the vibration is performed by using a component tap table with model ZDP1000 × 1000, and is used for vibrating the whole formed by the mold and the upper insulating block (5) and the lower insulating block (6) to remove redundant air bubbles in the upper insulating block (5) and the lower insulating block (6).
8. The packaging method of the transformer insulation packaging structure according to claim 6, wherein: in step S4, when the insulating material overflows from the overflow through hole (18), it indicates that the internal gaps and cavities of the upper insulating block (5) and the lower insulating block (6) are completely filled, i.e. the upper insulating block (5) and the lower insulating block (6) are integrated.
CN202210227205.8A 2022-03-08 2022-03-08 Transformer insulation packaging structure and packaging method Withdrawn CN114792596A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210227205.8A CN114792596A (en) 2022-03-08 2022-03-08 Transformer insulation packaging structure and packaging method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210227205.8A CN114792596A (en) 2022-03-08 2022-03-08 Transformer insulation packaging structure and packaging method

Publications (1)

Publication Number Publication Date
CN114792596A true CN114792596A (en) 2022-07-26

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ID=82460682

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210227205.8A Withdrawn CN114792596A (en) 2022-03-08 2022-03-08 Transformer insulation packaging structure and packaging method

Country Status (1)

Country Link
CN (1) CN114792596A (en)

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Application publication date: 20220726