CN204792293U - Formula of bending transformer box lid - Google Patents
Formula of bending transformer box lid Download PDFInfo
- Publication number
- CN204792293U CN204792293U CN201520386447.7U CN201520386447U CN204792293U CN 204792293 U CN204792293 U CN 204792293U CN 201520386447 U CN201520386447 U CN 201520386447U CN 204792293 U CN204792293 U CN 204792293U
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- Prior art keywords
- bending
- case lid
- transformer
- transformer box
- fillet
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- 238000005452 bending Methods 0.000 title claims abstract description 43
- 238000003466 welding Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 abstract description 16
- 239000010959 steel Substances 0.000 abstract description 16
- 230000006378 damage Effects 0.000 abstract description 4
- 230000001737 promoting effect Effects 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000003351 stiffener Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Casings For Electric Apparatus (AREA)
Abstract
The utility model discloses a formula of bending transformer box lid for the transformer box body, transformer box blankets on the transformer box body, and for party's female cap board, four limits of case lid all are located the outer side of transformer box side wall, and four edges of case lid are all done the fillet downwards and are bent and form four flanges, and the apron that forms the flange is bent the position and all is located the outer side of transformer box side wall, comes even as an organic whole and eliminate the seam through the welding on the case lid lateral surface between four flanges. The utility model discloses bending with the fillet and forming the flange, reduced the damage to the steel sheet antirust coat, the flange size of just bending is more reasonable for the better protection joint strip of flange ability is favorable to promoting the intensity of lapping moreover.
Description
Technical field
The utility model relates to transformer manufacture technology, especially a kind of bendable transformer box cover.
Background technology
Transformer is used for the voltage transitions of project of transmitting and converting electricity; be installed on outdoor; inside there is high tension apparatus; therefore good sealing is needed; current domestic conventional transformer generally have employed a monoblock steel plate as case lid; case lid stretches out case along 5mm; do not do special processing; such case lid cost is lower; but be difficult to protect the sealing joint strip on case edge; because transformer is at outside work, the sealing joint strip lacking protection easily occurs aging under the invasion and attack of ultraviolet irradiation and rainwater, and the sealing property of transformer is reduced greatly.And steel plate is easily out of shape when not being welded with stiffener, all can have an impact to the mechanical strength of transformer and sealing property.
Though there is partial monopoly to propose case lid with the technical scheme of bending technique formation rib at present; though these schemes can strengthen the intensity of steel plate; but owing to reckoning without the protection of sealing joint strip, and do not consider the impact of bending process on steel plate rust-proofing ability, directly affects the effect of these schemes.
A kind of distribution transformer cover plate is disclosed in the patent of publication number 103035367A, after its rib stretches out edge 60mm, get 30mm and carry out right-angle bending formation edge, the edge that the program is formed reaches 30mm far from tank wall distance, and the cover plate of this 30mm part is level board, make the translation space of case lid in installation process very large, when case lid is because of vibrations or when impacting generation slippage, sealing joint strip is easily damaged; And steel plate is in Forging Process; the plastic deformation of metal must cause damage to the antirust coat of steel plate; and the horizontal steel plate having 30mm wide between this scheme cover plate bending edges edge and tank wall; horizontal steel plate wide so easily accumulates rainwater; when antirust coat is destroyed by bending, as without follow-up antirust treatment, this part horizontal steel plate is easily by corrosion; the protection of impact to sealing joint strip, also directly can affect the intensity of cover plate.
Summary of the invention
The utility model proposes a kind of bendable transformer box cover; form rib with fillet bending, reduce the damage to steel plate antirust coat, the bending rib size of this product is more reasonable; make rib can protect sealing joint strip preferably, and be conducive to the intensity promoting cover plate.
The utility model adopts following scheme.
A kind of bendable transformer box cover, for transformer-cabinet, described transformer box cover is covered on transformer-cabinet, it is a square cover plate, four limits of case lid are all positioned at the outer side of transformer tank body sidewall, four edges of case lid do fillet bending all downwards and form four ribs, and the cover plate bending part forming rib is all positioned at the outer side of transformer tank body sidewall, is connected as a single entity and eliminates seam between four ribs through the welding on case lid lateral surface.
Described case lid thickness is 4mm, and transformer-cabinet 9mm is stretched out on the every limit of bending back box lid, and case lid edge is all downward carries out vertical bending with R4 fillet, and bending length is 20mm.
The utility model does fillet bending to four of case lid edges and forms four ribs, and rib can cover the sealing strip of transformer-cabinet, stops direct sunlight sealing strip, makes rainwater be difficult to corrode rain strip of paper used for sealing simultaneously, effectively slow down the aging of sealing strip.
Because rib of the present utility model is positioned at case lid surrounding, and be connected as a single entity, therefore the effect of stiffener, reinforcement can be played on cover structure, in the installation process of transformer, case lid is the large stretch of metallic plate be covered on transformer-cabinet, stress will inevitably be produced because of case lid deadweight at fulcrum place, case lid can be made in Long-Time Service process to produce ship shape or waveform distortion, and rib of the present utility model, can effectively decompose this part stress, produce the effect of similar stiffener, reinforcement, reduce ship shape or the waveform deformation of case lid.
Case lid rib bending size design of the present utility model is reasonable, take into full account the thickness of metallic plate, when adopting thickness to be the steel plate of 4mm, transformer-cabinet 9mm is stretched out on the every limit of bending back box lid, case lid edge is all downward carries out vertical bending with R4 fillet, bending length is 20mm, this just makes the rib after Bending Processing very little apart from the distance of wall box, while reserving certain size tolerance for case lid installation, make again the case lid after installation be difficult to long anomaly to move, both case lid obturation effect was effectively improved, make again sealing joint strip not easily impaired because of the slippage of case lid, and the covered effect of such rib to sealing joint strip is better.
Bending of the present utility model is the bending of R4 fillet, bending region has and seamlessly transits preferably, decrease the destruction to metal rust preventing layer, and bending region is very little apart from wall box distance, decrease the absorption to rainwater and accumulation, contribute to the antirust ability promoting bending region, decrease the follow-up anti-corrosive technology cost after case lid bending and drop into.
Be connected as a single entity through the welding on case lid lateral surface and eliminate seam between the utility model four ribs; because only welding outside gap; this strict protection size of rib; owing to there is no soldering inside seam; size inside rib can be conformed to bending design; when case lid is installed, bending rib can not encounter tank wall, both ensure that obturation effect, and sealing joint strip can be prevented again to be scratched.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Accompanying drawing 1 is the cut-away illustration that case lid described in the utility model is placed on transformer-cabinet;
Accompanying drawing 2 is transverse cross sectional schematic diagrames of case lid described in the utility model;
Accompanying drawing 3 is schematic top plan view of case lid described in the utility model;
In figure: 1-transformer box cover, 2-transformer sidewall, 3-sealing joint strip, 4-rib, 5-transformer-cabinet.
Embodiment
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of bendable transformer box cover 1, for transformer-cabinet 5, described transformer box cover 1 is covered on transformer-cabinet 5, be a square cover plate, four limits of case lid 1 are all positioned at the outer side of transformer tank body sidewall 2, and four edges of case lid 1 do fillet bending all downwards and form four ribs 4, the cover plate bending part forming rib 4 is all positioned at the outer side of transformer tank body sidewall 2, is connected as a single entity and eliminates seam between four ribs through the welding on case lid lateral surface.
Described case lid 1 thickness is 4mm, and transformer-cabinet 9mm is stretched out on the every limit of bending back box lid 1, and case lid 1 edge is all downward carries out vertical bending with R4 fillet, and bending length is 20mm.
The manufacture process of described case lid 1 is divided into following steps:
A, first cut open hole to 4mm steel plate number, steel plate length used adds 14mm for physical length after bending, and after width is similarly bending, developed width adds 14mm, and opening the length of side in steel plate corner is the foursquare breach of 21mm.
B, using steel plate edge to the inside 17mm place as bending center line with R4 fillet bending, formed rib 4.
C, carry out electric welding to the seam between four ribs 4, eliminate the gap between rib 4, electric welding is only carried out the outside in gap, and after electric welding, butt welded seam polishes.
After case lid 1 machines, be placed on transformer-cabinet 5, make rib 4 cover sealing joint strip 3 on transformer sidewall 2, then complete follow-up fixing after, namely complete installation.
Claims (2)
1. a bendable transformer box cover, for transformer-cabinet, it is characterized in that: described transformer box cover is covered on transformer-cabinet, it is a square cover plate, four limits of case lid are all positioned at the outer side of transformer tank body sidewall, four edges of case lid do fillet bending all downwards and form four ribs, and the cover plate bending part forming rib is all positioned at the outer side of transformer tank body sidewall, is connected as a single entity and eliminates seam between four ribs through the welding on case lid lateral surface.
2. a kind of bendable transformer box cover according to claim 1, it is characterized in that: described case lid thickness is 4mm, transformer-cabinet 9mm is stretched out on the every limit of bending back box lid, and case lid edge is all downward carries out vertical bending with R4 fillet, and bending length is 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520386447.7U CN204792293U (en) | 2015-06-08 | 2015-06-08 | Formula of bending transformer box lid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520386447.7U CN204792293U (en) | 2015-06-08 | 2015-06-08 | Formula of bending transformer box lid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204792293U true CN204792293U (en) | 2015-11-18 |
Family
ID=54532293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520386447.7U Active CN204792293U (en) | 2015-06-08 | 2015-06-08 | Formula of bending transformer box lid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204792293U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104952588A (en) * | 2015-06-08 | 2015-09-30 | 国家电网公司 | Round bend type transformer tank cover |
-
2015
- 2015-06-08 CN CN201520386447.7U patent/CN204792293U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104952588A (en) * | 2015-06-08 | 2015-09-30 | 国家电网公司 | Round bend type transformer tank cover |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |