CN104157430A - Lower-iron-yoke shielding structure of transformer and manufacturing technology of lower-iron-yoke shielding structure of transformer - Google Patents
Lower-iron-yoke shielding structure of transformer and manufacturing technology of lower-iron-yoke shielding structure of transformer Download PDFInfo
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- CN104157430A CN104157430A CN201410400044.3A CN201410400044A CN104157430A CN 104157430 A CN104157430 A CN 104157430A CN 201410400044 A CN201410400044 A CN 201410400044A CN 104157430 A CN104157430 A CN 104157430A
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Abstract
The invention discloses a lower-iron-yoke shielding structure of a transformer. The lower-iron-yoke shielding structure comprises an insulating cardboard, a leading-out wire, shielding wires and wrinkled carbon-black conductive paper, wherein the leading-out wire and the shielding wires are laid on and spliced to the insulating cardboard. The leading-out wire is connected with the shielding wires. The wrinkled carbon-black conductive paper is fixedly spliced with the insulating cardboard through a splicing structure arranged on the outer sides of the leading-out wire and the shielding wires. A manufacturing technology of the lower-iron-yoke shielding structure of the transformer includes the following steps: (1) copper strips are perpendicularly welded to one sides of copper braided wires respectively through tin soldering; (2) the copper strips and the copper braided wires which are well welded are spliced to the insulating cardboard, and the leading-out ends of the copper braided wires are arranged to extend out of the range of the insulating cardboard; (3) the copper strips and the copper braided wires are covered with the wrinkled carbon-black conductive paper, and the wrinkled carbon-black conductive paper is spliced with the insulating cardboard. According to the lower-iron-yoke shielding structure and the manufacturing technology, the leading-out wire and the shielding wires are respectively spliced with the insulating cardboard, and the insulating cardboard is spliced with the wrinkled carbon-black conductive paper, so that electrical connection between the parts is guaranteed, structure ductility is good, and reliability is high.
Description
Technical field
The present invention relates to technical field of transformer manufacturing, be specially a kind of lower yoke shielding construction and manufacturing process thereof of transformer.
Background technology
The lower yoke shielding adopting in existing power transformer product is to adopt aluminium-foil paper to do shielding material, by many strip metals aluminium foil film, is bonded in and made on very thin insulating paper.Aluminium-foil paper is bonded on insulating board, then on aluminium-foil paper, place the lead-out wire that adopts zinc-plated copper litz wire to make, last again by welding agent water or welding fluid and with electric iron, aluminium-foil paper and zinc-plated copper litz wire are welded together through solder joint, make its reliable contact form shielding construction.But there are the following problems for existing shielding construction and processing method: 1) welding together due to aluminium-foil paper and tin-coated copper litzendraht wire, could form a complete shielding, but because both fusing points are different, so during welding: if electric iron is long heating time, easily burn out aluminum foil shielded paper; If electric iron is too short heating time, aluminum foil shielded paper and tin-coated copper litzendraht wire just can not weld together, therefore, the welding under this structure, operation easier is large, and easily there is fault of construction in shielding construction.2) because the shielding of lower yoke is used in the lower end of device body, at device body, compress yoke shielding at present and also will be under pressure, if after aluminum foil shielded paper cracking, cannot automatically repair, just can not play shielding action, cause that the overheated drawn game of transformer puts the problems such as temperature is excessive.Cannot meet the instructions for use of lower yoke shielding.
Summary of the invention
For problems of the prior art, the invention provides a kind of processing simple, Stability Analysis of Structures, lower yoke shielding construction and the manufacturing process thereof of the transformer that shield effectiveness is good.
The present invention is achieved through the following technical solutions:
A lower yoke shielding construction for transformer, comprises insulating board, lays and is bonded in lead-out wire and the shielding conductor on insulating board, and wrinkle carbon black conductive paper; Lead-out wire is connected with shielding conductor, and wrinkle carbon black conductive paper is adhesively fixed by being arranged on bonded structure and the insulating board in lead-out wire and shielding conductor outside.
Preferably, lead-out wire respectively with some vertical connections of the shielding conductor being parallel to each other.
Preferably, lead-out wire adopts copper braid over braid to make, and the end of copper braid over braid is provided with soldering end socket; Shielding conductor adopts copper strips to make, and lead-out wire and shielding conductor are connected and fixed by soldering.
Preferably, bonded structure comprises splicing tape and adhesive spots; Splicing tape is set in parallel in respectively the both sides of lead-out wire and shielding conductor along its length; Adhesive spots is established spaced being arranged on insulating board and the remaining bonding region of wrinkle carbon black conductive paper.
Further, the distance of splicing tape and lead-out wire or shielding conductor is 15-20mm.
Further, adhesive spots is matrix arrangements, in horizontal or vertical direction between adjacent adhesive spots, is spaced apart 40-50mm.
The manufacturing process of the lower yoke shielding construction of a kind of transformer of the present invention, comprises the steps,
1) copper strips is vertically welded in respectively to a side of copper litz wire by soldering;
2) copper strips having welded and copper litz wire are bonded on insulating board, the exit of copper litz wire exceeds the scope setting of insulating board;
3) wrinkle carbon black conductive paper is covered on copper strips and copper litz wire, and bonding with insulating board.
Preferably, step 1) in, copper strips is removed each seamed edge burr wedge angle before welding with copper litz wire, clean by alcohol wipe after copper strips and the welding of copper braid over braid.
Preferably, step 2) in, first on insulating board, draw bonding wire; Then at scribing position place, with extruder, glue is extruded, then by paperboard strip, in bonding region, smear evenly, again copper strips and copper litz wire are placed on corresponding bonding region, finally by cardboard, foundary weight are placed on copper strips and copper litz wire and keep at least 6h.
Preferably, step 3) in, when wrinkle carbon black conductive paper and insulating board are bonding, respectively apart from 15～20mm place, copper strips both sides along copper strips length direction brush coating, and at all the other bonding locations at interval of gluing the connecing of 40-50mm point.
Compared with prior art, the present invention has following useful technique effect:
Shielding construction of the present invention is by being arranged on lead-out wire and shielding conductor between insulating board and wrinkle carbon black conductive paper, and coordinate lead-out wire and shielding conductor bonding with insulating board respectively, and bonding between insulating board and wrinkle carbon black conductive paper, guaranteed being electrically connected between lead-out wire and shielding conductor and wrinkle carbon black conductive paper, and in the course of processing, there will not be structural failure, in use occur the loose contact causing because of processing; And Local Cracking after wrinkle carbon black paper pressurized in time, because its structure has good ductility, thereby wrinkle carbon black conductive paper that can crack location still overlaps and forms a complete shielding, plays the effect of lower yoke shielding.
Further, evenly vertical connection the by between lead-out wire and shielding conductor, guaranteed the shield effectiveness of shielding construction; And making its shielding construction stable by the selection of same material, shielding properties is good.
Further, by the layout of splicing tape, can guarantee wrinkle carbon black conductive paper with lead-out wire or shielding conductor is optimum contact in, by the layout of adhesive spots, guarantee ductility and the overlapping covering feature of wrinkle carbon black conductive paper, avoided contact-making surface complete bonding and cause it to extend and overlapping problem.
Further, the position between the position of splicing tape and adhesive spots is limited and simplified manufacturing procedure, reduced difficulty of processing, improved working (machining) efficiency.
Manufacturing process of the present invention, utilize first by the direct welding of the material of original shielding action and lead-out wire, change into by shielding material and lead-out wire bonding respectively at insulating board, the contact that realizes both connects, thereby avoided because of welding cause to the destruction of shielding material or unreliable connection, not only reduced manufacture difficulty, and the reliability that has improved contact and used; And by lead-out wire has been arranged between shielding material and insulating board, guaranteed its electric conductivity; Utilize wrinkle carbon black conductive paper to realize shielding, because it has good ductility, even Local Cracking after lower yoke shielding pressurized, but the wrinkle carbon black conductive paper of crack location can be together overlapping and form a complete shielding, lower yoke is played to the effect of shielding, use reliably, the life-span is long.
Further, by the processing to before and after copper strips welding, guaranteed the stable and reliable of extracted current; The bonding processing of utilization to copper strips and copper litz wire, guaranteed its with the location of insulating board be fixedly connected with, avoided the loose contact of coming unstuck and producing in use procedure; By to the bonding location of wrinkle carbon black conductive paper and the setting of method, when guaranteeing its ductility, guaranteed the good contact of itself and copper strips and copper litz wire.
Accompanying drawing explanation
Fig. 1 is the structural representation described in example of the present invention.
Wherein: insulating board 1, lead-out wire 2, shielding conductor 3, wrinkle carbon black conductive paper 4, splicing tape 5, adhesive spots 6.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
The lower yoke shielding construction of a kind of transformer of the present invention, as shown in Figure 1, comprises insulating board 1, lays and is bonded in lead-out wire 2 and the shielding conductor 3 on insulating board 1, and wrinkle carbon black conductive paper 4; Lead-out wire 2 is connected with shielding conductor 3, and wrinkle carbon black conductive paper 4 is adhesively fixed by being arranged on bonded structure and the insulating board in lead-out wire 2 and shielding conductor 3 outsides.
Wherein, lead-out wire 2 respectively with some vertical connections of the shielding conductor being parallel to each other 3; Lead-out wire 2 adopts copper braid over braid to make, and the end of copper braid over braid is provided with soldering end socket; Shielding conductor 3 adopts copper strips to make, and lead-out wire 2 and shielding conductor 3 are connected and fixed by soldering.As shown in Figure 1, in this preferred embodiment, adopt three copper strips to do the shielding conductor 3 of horizontal arrangement, adopt copper braid over braid to do that lead-out wire 2 is vertical with copper strips respectively to be fixed through soldering.
Wherein, bonded structure comprises splicing tape 5 and adhesive spots 6; Splicing tape 5 is set in parallel in respectively the both sides of lead-out wire 2 and shielding conductor 3 along its length; Adhesive spots 6 is established spaced being arranged on insulating board 1 and wrinkle carbon black conductive paper 4 remaining bonding regions; As shown in Figure 1, in this preferred embodiment, splicing tape 5 is 15-20mm with the distance of lead-out wire 2 or shielding conductor 3, and adopting 15mm is example explanation; Adhesive spots 6 is matrix arrangements, in horizontal or vertical direction between adjacent adhesive spots 6, is spaced apart 40-50mm, and adopting 50mm is example explanation.
As shown in Figure 1, when bonding between insulating board 1 and wrinkle carbon black conductive paper 4, at the side of lead-out wire 2 owing to being in the layout area of splicing tape 5, therefore adopt splicing tape 5 to carry out bonding, its excess-three limit is greater than 20mm or not in the longitudinal direction from the distance of shielding conductor 3, therefore adopts adhesive spots 6 bonding; And at remaining other bonding locations, adopt equally spaced adhesive spots 6 bonding, as shown in Figure 1, on top between edge and lower limb and adjacent splicing tape 9, be provided with adhesive spots 6, in two bonding regions that the splicing tape 5 at left side edge and middle part forms respectively, be provided with the adhesive spots 6 that is matrix arrangements.Thereby lead-out wire 2 is not directly connected with wrinkle carbon black conductive paper 4 with shielding conductor 3, and by bonding with insulating board 1 respectively, realizes both electrical connections, form the lower yoke shielding construction of transformer, easy to process, Stability Analysis of Structures, anti-pressure ability is strong, long service life.
The manufacturing process of the lower yoke shielding construction of a kind of transformer of the present invention, realizes and manufactures processing the lower yoke shielding construction of above-described a kind of transformer, and it comprises the steps,
1) copper strips is vertically welded in respectively to a side of copper litz wire by soldering;
2) copper strips having welded and copper litz wire are bonded on insulating board, the exit of copper litz wire exceeds the scope setting of insulating board;
3) wrinkle carbon black conductive paper is covered on copper strips and copper litz wire, and bonding with insulating board.
Wherein, step 1) in, copper strips is removed each seamed edge burr wedge angle before welding with copper litz wire, clean clean by alcohol wipe after copper strips and the welding of copper braid over braid; Copper braid over braid end soldering end socket; Step 2), in, first on insulating board, draw bonding wire; Then at scribing position place, with extruder, glue is extruded, then by paperboard strip, in bonding region, smear evenly, again copper strips and copper litz wire are placed on corresponding bonding region, finally by cardboard, foundary weight are placed on and on copper strips and copper litz wire, pressurize and keep at least 6h; Step 3) in, when wrinkle carbon black conductive paper and insulating board are bonding, respectively apart from 15～20mm place, copper strips both sides along copper strips length direction brush coating, and at all the other bonding locations at interval of gluing the connecing of 40-50mm point.
Claims (10)
1. a lower yoke shielding construction for transformer, is characterized in that, comprises insulating board (1), lay and be bonded in lead-out wire (2) and the shielding conductor (3) on insulating board (1), and wrinkle carbon black conductive paper (4); Lead-out wire (2) is connected with shielding conductor (3), and wrinkle carbon black conductive paper (4) is adhesively fixed by being arranged on bonded structure and the insulating board in lead-out wire (2) and shielding conductor (3) outside.
2. the lower yoke shielding construction of a kind of transformer according to claim 1, is characterized in that, lead-out wire (2) respectively with vertical connection of some shielding conductors that are parallel to each other (3).
3. the lower yoke shielding construction of a kind of transformer according to claim 1 and 2, is characterized in that, lead-out wire (2) adopts copper braid over braid to make, and the end of copper braid over braid is provided with soldering end socket; Shielding conductor (3) adopts copper strips to make, and lead-out wire (2) and shielding conductor (3) are connected and fixed by soldering.
4. the lower yoke shielding construction of a kind of transformer according to claim 1, is characterized in that, bonded structure comprises splicing tape (5) and adhesive spots (6); Splicing tape (5) is set in parallel in respectively the both sides of lead-out wire (2) and shielding conductor (3) along its length; Adhesive spots (6) is established spaced being arranged on insulating board (1) and the remaining bonding region of wrinkle carbon black conductive paper (4).
5. the lower yoke shielding construction of a kind of transformer according to claim 4, is characterized in that, described splicing tape (5) is 15-20mm with the distance of lead-out wire (2) or shielding conductor (3).
6. the lower yoke shielding construction of a kind of transformer according to claim 4, is characterized in that, adhesive spots (6) is matrix arrangements, in horizontal or vertical direction between adjacent adhesive spots (6), is spaced apart 40-50mm.
7. the manufacturing process of the lower yoke shielding construction of a kind of transformer as claimed in claim 3, is characterized in that, comprise the steps,
1) copper strips is vertically welded in respectively to a side of copper litz wire by soldering;
2) copper strips having welded and copper litz wire are bonded on insulating board, the exit of copper litz wire exceeds the scope setting of insulating board;
3) wrinkle carbon black conductive paper is covered on copper strips and copper litz wire, and bonding with insulating board.
8. the manufacturing process of the lower yoke shielding construction of a kind of transformer according to claim 7, is characterized in that step 1) in, copper strips is removed each seamed edge burr wedge angle before welding with copper litz wire, clean by alcohol wipe after copper strips and the welding of copper braid over braid.
9. the manufacturing process of the lower yoke shielding construction of a kind of transformer according to claim 7, is characterized in that step 2) in, bonding wire first on insulating board, drawn; Then at scribing position place, with extruder, glue is extruded, then by paperboard strip, in bonding region, smear evenly, again copper strips and copper litz wire are placed on corresponding bonding region, finally by cardboard, foundary weight are placed on copper strips and copper litz wire and keep at least 6h.
10. the manufacturing process of the lower yoke shielding construction of a kind of transformer according to claim 7, it is characterized in that, step 3) in, when wrinkle carbon black conductive paper and insulating board are bonding, respectively apart from 15～20mm place, copper strips both sides along copper strips length direction brush coating, and at all the other bonding locations at interval of gluing the connecing of 40-50mm point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410400044.3A CN104157430B (en) | 2014-08-14 | 2014-08-14 | The lower yoke shielding construction of a kind of transformator and manufacturing process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410400044.3A CN104157430B (en) | 2014-08-14 | 2014-08-14 | The lower yoke shielding construction of a kind of transformator and manufacturing process thereof |
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| CN104157430A true CN104157430A (en) | 2014-11-19 |
| CN104157430B CN104157430B (en) | 2016-11-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106645832A (en) * | 2017-01-03 | 2017-05-10 | 张涉应 | Anti-interference digital electric meter and manufacturing method thereof |
| CN113470955A (en) * | 2021-06-25 | 2021-10-01 | 特变电(沈阳)电工新材料有限公司 | Production process and application of conductive belt with shielding function for power transformer |
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| CN104157430B (en) | 2016-11-23 |
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