CN207264890U - A kind of denoising structure for converter power transformer - Google Patents
A kind of denoising structure for converter power transformer Download PDFInfo
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- CN207264890U CN207264890U CN201721377753.XU CN201721377753U CN207264890U CN 207264890 U CN207264890 U CN 207264890U CN 201721377753 U CN201721377753 U CN 201721377753U CN 207264890 U CN207264890 U CN 207264890U
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- power transformer
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Abstract
It the utility model is related to a kind of denoising structure for converter power transformer, it is arranged to the fire wall of semi-surrounding and the converter power transformer in it including three faces, the denoising structure includes fixed noise reduction part and detachable noise reduction part, and the fixation noise reduction unit point includes:Noise reduction part, the fixed noise reduction part in front portion are fixed in top, and the detachable noise reduction unit point includes:Top side detachable noise reduction part, anterior detachable noise reduction part.The beneficial effects of the utility model are, the removable denoising structure in part is replaced using the detachable denoising structure in part, cancel the bracing members block being arranged on converter power transformer body, simplify structure arrangement, mobile noise reduction part and the collision of electric casing, rise seat, oil pipe and stent of complexity are avoided, solves structure design cycle length and joint structure challenge.Meanwhile after the removable denoising structure in part is optimized for the detachable denoising structure in part, since structure simplifies, every change of current becomes denoising structure Weight of steel and is reduced to 12 tons from 16 tons, and economic benefit is obvious.
Description
Technical field
A kind of buck configuration for converter power transformer is the utility model is related to, espespecially one kind ± 1100kV extra-high voltage direct-currents
The dismountable denoising structure of part fixed part of current conversion station and use ± 800kV UHVDC converter stations (layer-specific access).
Background technology
In routine ± 800kV UHVDC converter stations, the change of current becomes fire wall spacing as 8.5m, and spacing is smaller, Yuan Youyong
In the denoising structure of converter power transformer, it is divided into mobile denoising structure part and fixed denoising structure part.Noise reduction knot is fixed at top
Structure part is fixed on fire wall using overhanging trivet, on the basis of front retention section is connected to using steel column；Mobile noise reduction
Structure division is fixed on converter power transformer bodies top and front end, passes through the bracing members block spiral shell with being reserved on converter power transformer body
Tether and connect.
Due to having numerous electrically casings, rise seat, oil pipe and stent etc. on converter power transformer body, cause mobile noise reduction
Part need to avoid these components, and there are structure design cycle length, and joint structure is complicated, and security reliability is relatively low, and in-site installation touches
More than hitting and the shortcomings of the set-up time is slow.
As ± 800 kilovolts of extra-high voltage direct-current transmission engineerings are using layer-specific access technology and ± 1100 kilovolts of extra-high voltage direct-currents
Power transmission engineering is built, and the spacing that the change of current becomes fire wall is expanded to 15m, original part fixed part movement drop from original 8.5m
Structure of making an uproar has been difficult to adapt to, and since fire wall spacing increases by about one time, trivet fixed part deformation in top is larger, and rod piece is cut
Face increases, and steel using amount greatly increases, and the interference and collision increase with water spray pipeline, the change of current becomes between top and top denoising structure
Space for maintenance reduce cause operations staff maintenance inconvenience.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, there is provided a kind of part for converter power transformer is consolidated
The fixed and dismountable denoising structure in part, to replace the denoising structure that part is fixed and part is mobile, to reach simplified structure
Arrangement, structure is reasonable, joint structure is simple, in-site installation collision less, easy for installation, steel using amount reduces and economical rationality etc.
Purpose.
To reach above-mentioned purpose, the utility model provides a kind of denoising structure for converter power transformer, including three faces are set
The fire wall of semi-surrounding and the converter power transformer in it are set to, the denoising structure is including fixed noise reduction part and detachably
Noise reduction part,
The fixation noise reduction unit point includes:
Noise reduction part is fixed at top, by the fixed noise reduction unit packet in the fixed noise reduction part in the first top and the second top into, point
The top of the fire wall of the converter power transformer both sides is not arranged on；
The fixed noise reduction part in front portion, by the first anterior fixed noise reduction part and the second anterior fixed noise reduction unit packet into, point
The front end of the both sides fire wall of the converter power transformer is not arranged on, closes on the converter power transformer, wherein first is anterior fixed
Noise reduction part is fixedly connected with the fixed noise reduction part in the first top, the fixed noise reduction part in the front portion of institute second and the fixed drop in the second top
Make an uproar and be partly fixedly connected；
The detachable noise reduction unit point includes:
Top side detachable noise reduction part, is arranged on the top of converter power transformer, and the two of the top side detachable noise reduction part
Lateral edges are removable with the inner edge of the fixed noise reduction part in inner edge and the second top of the fixed noise reduction part in the described first top respectively
Unload connection；
Anterior detachable noise reduction part, is arranged on the front portion of converter power transformer, and the two of the anterior detachable noise reduction part
Lateral edges are removable with the inner edge of the described first anterior fixed noise reduction part and the inner edge of the second anterior fixed noise reduction part respectively
Unload connection.
Preferably, noise reduction part is fixed in the both sides of the edge of the top side detachable noise reduction part with the described first top respectively
The inner edge of the fixed noise reduction part in inner edge and the second top be threadedly coupled；The both sides of the edge of the anterior detachable noise reduction part
It is threadedly coupled respectively with the inner edge of the described first anterior fixed noise reduction part and the inner edge of the second anterior fixed noise reduction part.
Preferably, the fixed noise reduction unit point in the front portion includes：
Steel column, the steel column bottom are fixed on the basis of the converter power transformer, and the top of the steel column is fixed on institute
State on the fixed noise reduction part in top；
Sound absorption and insulation plate, the sound absorption and insulation plate are installed on the steel column.
Preferably, the sound absorption and insulation plate is connected by pressing plate and bolt with the steel column.
Preferably, noise reduction unit point is fixed at the top includes fixed part longeron, fixed part crossbeam and sound absorption and insulation
Plate, the fixed part longeron are connected with fixed part crossbeam by fixing bolt, and sound absorption and insulation plate is fixed on fixed part horizontal stroke
Liang Shang；The top side detachable noise reduction unit point includes removable section crossbeam and sound absorption and insulation plate, the removable section
Crossbeam is connected with the fixed part longeron by hinged bolt, and sound absorption and insulation plate is fixed on removable section crossbeam.
Preferably, the sound absorption and insulation plate of top fixation noise reduction part passes through pressing plate and bolt and the fixed part in side
Crossbeam connects；The sound absorption and insulation plate of top side detachable noise reduction part is horizontal by pressing plate and bolt and the removable section in side
Beam connects；The sound absorption and insulation plate of noise reduction part is fixed at top and the sound absorption and insulation plate of top side detachable noise reduction part leads in opposite side
Cross sealing clamp and be bolted.
Preferably, the top is fixed in the middle part of noise reduction part and is connected by the basis of steel column and converter power transformer.
Preferably, the fixed noise reduction part in the fixed noise reduction part in the first top and the second top passes through two steel respectively
Two basis connections of every side of column and converter power transformer.
Preferably, the fixed noise reduction unit point in the front portion includes front end steel column and sound absorption sound panel, and sound absorption and insulation plate passes through
Pressing plate and bolt are connected with front end steel column；
The detachable noise reduction unit in the front end point includes sound absorption and insulation plate；
The sound absorption and insulation plate of the detachable noise reduction part in front end is connected by pressing plate and hinged bolt with front end steel column；
Noise reduction unit point is fixed at the top includes fixed part longeron, fixed part crossbeam and sound absorption and insulation plate, described
Fixed part longeron is connected with fixed part crossbeam by fixing bolt, and sound absorption and insulation plate is fixed on fixed part crossbeam；
The top side detachable noise reduction unit point includes removable section crossbeam and sound absorption and insulation plate, the detachable part
Crossbeam is divided to be connected with the fixed part longeron by hinged bolt, sound absorption and insulation plate is fixed on removable section crossbeam；
The sound absorption and insulation plate that noise reduction part is fixed at top is connected in side by pressing plate and bolt with the fixed part crossbeam
Connect；The sound absorption and insulation plate of top side detachable noise reduction part is connected in side by pressing plate and bolt with the removable section crossbeam
Connect；The sound absorption and insulation plate of top fixation noise reduction part and the sound absorption and insulation plate of top side detachable noise reduction part pass through close in opposite side
Seal pressing plate and be bolted.
Original denoising structure for converter power transformer, is divided into mobile denoising structure part and fixed denoising structure part.
Fixed denoising structure part is fixed on basis and fire wall；Mobile denoising structure part is fixed on converter power transformer bodies top
And front end, it is bolted by the bracing members block with being reserved on converter power transformer body.
Due to having numerous electrically casings, rise seat, oil pipe and stent etc. on converter power transformer body, cause mobile noise reduction
Part need to avoid these components, and there are structure design cycle length, and joint structure is complicated, and security reliability is relatively low, and in-site installation touches
More than hitting and the shortcomings of the set-up time is slow.
The utility model proposes a kind of fixation of part and the detachable denoising structure in part, and top trivet is overhang fixed part
Divide and be optimized for beam column fixed structure；The removable denoising structure part of original is optimized for detachable denoising structure part, is become with the change of current
Depressor body separates, and cancels the bracing members block being arranged on converter power transformer body, and detachable denoising structure part is dropped with fixed
Structure division of making an uproar is connected by screw bolts.The utility model simplifies denoising structure arrangement, optimizes rod piece quantity and sectional dimension,
Reach structure is reasonable, joint structure is simple, safe and reliable, in-site installation collision less, easy for installation, steel using amount reduces and warp
Help the advantages that reasonable.
The fixation denoising structure part of the utility model uses beam column construction, and it is solid to be in addition installed on part to sound absorption and insulation plate
It is optimized on the basis of the fixed mobile denoising structure in part：50mm is stayed to stitch between top and front end Felt in the prior art,
Sealed by sealing strip, the change of current becomes to be needed to remove sealing strip when replacing.Removable section sound insulationg board passes through pressing plate, bolt and girder steel
Connection.
The beneficial effects of the utility model are to replace the removable denoising structure in part using the detachable denoising structure in part,
Cancel and be arranged on bracing members block on converter power transformer body, simplify structure arrangement, avoid the mobile noise reduction part of complexity with
Electric casing, the collision for raising seat, oil pipe and stent, solve structure design cycle length and joint structure challenge.Reach
Simplified structure arrangement, structure is reasonable, joint structure is simple, in-site installation collision less, it is easy for installation the advantages that.Meanwhile
After from part, removable denoising structure is optimized for the detachable denoising structure in part, since structure simplifies, every change of current becomes noise reduction knot
Structure Weight of steel is reduced to 12 tons from 16 tons, and economic benefit is obvious.
It is to be understood that in the scope of the utility model, above-mentioned each technical characteristic of the utility model and below (such as implementation
Mode) in specifically describe each technical characteristic between can be combined with each other, so as to form new or preferable technical solution.Limit
In length, not repeated them here.
Brief description of the drawings
Fig. 1 is the top plan view of the utility model denoising structure；
Fig. 2 is 1-1 schematic cross-sections in Fig. 1；
Fig. 3 is 2-2 schematic cross-sections in Fig. 1；
Fig. 4 is 3-3 schematic cross-sections in Fig. 1；
Fig. 5 is 4-4 schematic cross-sections in Fig. 1；
Fig. 6 is the connection diagram of top denoising structure in the utility model；
Fig. 7 is the connection diagram of front end denoising structure in the utility model；
Fig. 8 is the connection diagram of top side detachable and fixed part sound absorption and insulation plate in the utility model；
Fig. 9 is the detachable connection diagram with fixed part sound absorption and insulation plate in front end in the utility model.
Embodiment
Term is explained
Converter power transformer：The power transformer being connected between converter bridge and AC system.
With the raising of extra-high voltage direct-current engineering transmission capacity and voltage, with ± 800 kilovolts of extra-high voltage direct-current transmission works
Cheng Caiyong layer-specific accesses technology and ± 1100 kilovolts of extra-high voltage direct-current transmission engineerings are built, and the change of current becomes the spacing of fire wall from original
The 8.5m come is expanded to 15m, and original part fixed part movement denoising structure has been difficult to adapt to, top fixed part trivet
Deform excessive, bar cross section increases, and steel using amount greatly increases, the interference and collision increase with water spray pipeline, the inspection of operations staff
Repair space reduction.Without advantage in technology, economy and running environment.
The utility model proposes a kind of fixation of part and the detachable denoising structure in part, and top trivet is overhang fixed part
Divide and be optimized for beam column fixed structure；The removable denoising structure part of original is optimized for detachable denoising structure part, is become with the change of current
Depressor body separates, and cancels the bracing members block being arranged on converter power transformer body, and detachable denoising structure part is dropped with fixed
Structure division of making an uproar is connected by screw bolts.The utility model simplifies denoising structure arrangement, optimizes rod piece quantity and sectional dimension,
Reach structure is reasonable, joint structure is simple, safe and reliable, in-site installation collision less, easy for installation, steel using amount reduces and warp
Help the advantages that reasonable.
The utility model employs following technical solution：
Fixed denoising structure part includes：The front end of the both sides fire wall of the converter power transformer is arranged on, closes on the change of current
Noise reduction part is fixed in the front end of transformer；With the top of the both sides fire wall that is arranged on converter power transformer, noise reduction is fixed with front end
Noise reduction part is fixed at the top that part is connected.
Detachable denoising structure part includes：The detachable noise reduction part of the front end of converter power transformer is arranged on, with front end
Fixed noise reduction part connection；With the top for being arranged on converter power transformer, the top being connected with top fixation noise reduction unit split-phase is removable
Noise reduction part is unloaded, is connected by screw bolts.
A kind of denoising structure for converter power transformer as Figure 1-Figure 5, including three faces are arranged to the anti-of semi-surrounding
Wall with flues 1 and the converter power transformer 2 in it.Both sides fire wall 11,12 and rear portion fire wall 13 are synthesis door shape, wherein opening
Oral area is the front portion of converter power transformer 2, and the knot of closing will be formed after being surrounded by denoising structure on anterior and top.The noise reduction knot
Structure includes fixed noise reduction part 3 and detachable noise reduction part 4.
Fixed noise reduction part 3 includes top and fixes noise reduction part 31 and anterior fixed noise reduction part 32.Noise reduction is fixed at top
Part 31 is made of the fixed noise reduction part 312 in fixed 311 and second top of noise reduction part in the first top, is separately positioned on described change
The top of the fire wall 11,12 of convertor transformer both sides；The fixed noise reduction part 32 in front portion is by the first anterior fixed 321 He of noise reduction part
Second anterior fixed noise reduction part 322 forms, and is separately positioned on the front end of the both sides fire wall 11,12 of the converter power transformer,
The converter power transformer 2 is closed on, wherein the first anterior fixed noise reduction part 321 is fixed with the fixed noise reduction part 311 in the first top
Connection, institute second fix 312 with the fixed noise reduction part in the second top in anterior fixed noise reduction part 322 and are connected.
The detachable noise reduction part 4 includes top side detachable noise reduction part 41 and anterior detachable noise reduction part 42.
Top side detachable noise reduction part 41 is arranged on the top of converter power transformer 2, the two sides of the top side detachable noise reduction part 41
Inner edge of the edge respectively with the fixed noise reduction part 312 in inner edge and the second top of the fixed noise reduction part 311 in the described first top leads to
Cross and be bolted；Anterior detachable noise reduction part 42 is arranged on the front portion of converter power transformer 3, the anterior detachable noise reduction part
Noise reduction part is fixed in 42 both sides of the edge with the inner edge of the described first anterior fixed noise reduction part 321 and the second front portion respectively
322 inner edge is bolted.
As shown in figure 9, anterior fixed noise reduction part 32 includes front end steel column 323 and sound absorption sound panel 324, sound absorption and insulation plate
324 are connected by pressing plate 325 and bolt 326 with front end steel column 323.Pressing plate 325 is L-shaped, and one end compresses sound absorption and insulation plate
324, other end is fixedly connected with front end steel column 323.Steel column 323 section in front end is I-shaped, and sound absorption and insulation plate 324 is fixed on
I-shaped cross rail inner, and top by pressing plate 325 against.The detachable noise reduction part 42 in the front end includes sound absorption and insulation
Plate 421；Sound absorption and insulation plate 421 is connected by pressing plate 422 and hinged bolt 423 with front end steel column 323.Sound absorption and insulation plate 421
Ground leans against I-shaped cross rail outer, 422 Z-shaped pressing plates of pressing plate, and end face is against front end steel column 323, and other end is by can
Demounting bolt 423 is fixedly connected.
As shown in Fig. 6,7,8, noise reduction part 31 is fixed at top includes fixed part longeron 314,313 and of fixed part crossbeam
Sound absorption and insulation plate 315, the fixed part longeron 314 and fixed part crossbeam 313 are connected by fixing bolt 316, absorb sound every
Sound plate 315 is fixed on fixed part crossbeam 313.Top side detachable noise reduction part 41 includes removable section crossbeam 411 and inhales
Sound sound insulationg board 412, removable section crossbeam 411 are connected with the fixed part longeron 314 by hinged bolt 413, sound absorption
Sound insulationg board 412 is fixed on removable section crossbeam 411.The sound absorption and insulation plate 315 that noise reduction part 31 is fixed at top leads in side
Pressing plate 317 and bolt 318 is crossed to be connected with the fixed part crossbeam 313；The sound absorption and insulation plate of top side detachable noise reduction part 41
412 are connected in side by pressing plate 414 and bolt 415 with the removable section crossbeam 411.Noise reduction part 31 is fixed at top
Sound absorption and insulation plate 315 and the sound absorption and insulation plate 412 of top side detachable noise reduction part 41 pass through sealing clamp 51 and spiral shell in opposite side
Bolt 52 connects.
Unless otherwise instructed, it is herein presented be similar to " first ", the qualifier of " second " do not mean that it is suitable to the time
The restriction of sequence, quantity or importance, and be used for the purpose of a technical characteristic in the technical program and another technology
Feature is mutually distinguished.Similarly, the herein presented qualifier similar to " one " does not mean that the restriction to quantity, but describes
The technical characteristic not occurred above.
As described above, the utility model provides, a part preferably for converter power transformer is fixed and part is dismountable
Denoising structure, and relevant application, then offer patent application in accordance with the law；However, shown in the implementation explanation and schema of the above, it is
This creation preferred embodiment, not limits to this creation with this, therefore such as approximate with the construction, device, feature of this creation etc.,
It is identical, founding within purpose and claim for this creation should all be belonged to.
The preferred embodiment of the utility model is described in detail above, it is understood that understanding this practicality newly reading
After the above-mentioned instruction content of type, those skilled in the art can make various changes or modifications the utility model, these are of equal value
Form is also fallen within the scope of the appended claims of the present application.
Claims (9)
- A kind of 1. denoising structure for converter power transformer, it is characterised in that, including three faces be arranged to the fire wall of semi-surrounding with And the converter power transformer in it, the denoising structure include fixed noise reduction part and detachable noise reduction part,The fixation noise reduction unit point includes:Noise reduction part is fixed at top, by the fixed noise reduction unit packet in the fixed noise reduction part in the first top and the second top into setting respectively Put on the top of the fire wall of the converter power transformer both sides；The fixed noise reduction part in front portion, by the first anterior fixed noise reduction part and the second anterior fixed noise reduction unit packet into setting respectively Put in the front end of the both sides fire wall of the converter power transformer, close on the converter power transformer, wherein the first anterior fixed noise reduction Part is fixedly connected with the fixed noise reduction part in the first top, the anterior fixed noise reduction part of institute second and the fixed noise reduction unit in the second top Divide and be fixedly connected；The detachable noise reduction unit point includes:Top side detachable noise reduction part, is arranged on the top of converter power transformer, the two sides of the top side detachable noise reduction part Inner edge of the edge respectively with the fixed noise reduction part in inner edge and the second top of the fixed noise reduction part in the described first top detachably connects Connect；Anterior detachable noise reduction part, is arranged on the front portion of converter power transformer, the two sides of the anterior detachable noise reduction part Edge detachably connects with the inner edge of the described first anterior fixed noise reduction part and the inner edge of the second anterior fixed noise reduction part respectively Connect.
- 2. the denoising structure according to claim 1 for converter power transformer, it is characterised in that the top side detachable drop Make an uproar the both sides of the edge fixed noise reduction part in inner edge and the second top with the fixed noise reduction part in the described first top respectively of part Inner edge be threadedly coupled；Noise reduction part is fixed in the both sides of the edge of the anterior detachable noise reduction part with the described first front portion respectively Inner edge and the inner edge of the second anterior fixed noise reduction part be threadedly coupled.
- 3. the denoising structure according to claim 1 for converter power transformer, it is characterised in that the fixed drop in the front portion Making an uproar partly includes：Steel column, the steel column bottom are fixed on the basis of the converter power transformer, and the top of the steel column is fixed on the top Portion is fixed on noise reduction part；Sound absorption and insulation plate, the sound absorption and insulation plate are installed on the steel column.
- 4. the denoising structure according to claim 3 for converter power transformer, it is characterised in that the sound absorption and insulation plate leads to Pressing plate and bolt is crossed to be connected with the steel column.
- 5. the denoising structure according to claim 1 for converter power transformer, it is characterised in that drop is fixed at the top Making an uproar partly includes fixed part longeron, fixed part crossbeam and sound absorption and insulation plate, and the fixed part longeron and fixed part are horizontal Beam is connected by fixing bolt, and sound absorption and insulation plate is fixed on fixed part crossbeam；The top side detachable noise reduction unit subpackage Removable section crossbeam and sound absorption and insulation plate are included, the removable section crossbeam passes through detachable with the fixed part longeron It is bolted, sound absorption and insulation plate is fixed on removable section crossbeam.
- 6. the denoising structure according to claim 5 for converter power transformer, it is characterised in that noise reduction part is fixed at top Sound absorption and insulation plate be connected in side by pressing plate and bolt with the fixed part crossbeam；The suction of top side detachable noise reduction part Sound sound insulationg board is connected in side by pressing plate and bolt with the removable section crossbeam；Top fix the sound absorption of noise reduction part every Sound plate and the sound absorption and insulation plate of top side detachable noise reduction part by sealing clamp and are bolted in opposite side.
- 7. the denoising structure according to claim 5 for converter power transformer, it is characterised in that drop is fixed at the top Make an uproar and connected by the basis of steel column and converter power transformer in the middle part of part.
- 8. the denoising structure according to claim 7 for converter power transformer, it is characterised in that first top is solid The fixed noise reduction part in noise reduction part and the second top is determined respectively by two steel columns and two bases of every side of converter power transformer Connection.
- 9. the denoising structure according to claim 1 for converter power transformer, it is characterised in thatThe described fixed noise reduction unit point in front portion includes front end steel column and sound absorption sound panel, sound absorption and insulation plate by pressing plate and bolt and Front end steel column connection；The detachable noise reduction unit in the front end point includes sound absorption and insulation plate；The sound absorption and insulation plate of the detachable noise reduction part in front end is connected by pressing plate and hinged bolt with front end steel column；Noise reduction unit point is fixed at the top includes fixed part longeron, fixed part crossbeam and sound absorption and insulation plate, the fixation Part longeron is connected with fixed part crossbeam by fixing bolt, and sound absorption and insulation plate is fixed on fixed part crossbeam；The top side detachable noise reduction unit point includes removable section crossbeam and sound absorption and insulation plate, and the removable section is horizontal Beam is connected with the fixed part longeron by hinged bolt, and sound absorption and insulation plate is fixed on removable section crossbeam；The sound absorption and insulation plate that noise reduction part is fixed at top is connected in side by pressing plate and bolt with the fixed part crossbeam；Top The sound absorption and insulation plate of the detachable noise reduction part in portion is connected in side by pressing plate and bolt with the removable section crossbeam；Top The sound absorption and insulation plate of fixed noise reduction part and the sound absorption and insulation plate of top side detachable noise reduction part pass through sealing clamp in opposite side Be bolted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721377753.XU CN207264890U (en) | 2017-10-24 | 2017-10-24 | A kind of denoising structure for converter power transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721377753.XU CN207264890U (en) | 2017-10-24 | 2017-10-24 | A kind of denoising structure for converter power transformer |
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| CN207264890U true CN207264890U (en) | 2018-04-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110993291A (en) * | 2019-12-18 | 2020-04-10 | 国网电力科学研究院有限公司 | Top structure suitable for Box-in device of converter transformer |
-
2017
- 2017-10-24 CN CN201721377753.XU patent/CN207264890U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110993291A (en) * | 2019-12-18 | 2020-04-10 | 国网电力科学研究院有限公司 | Top structure suitable for Box-in device of converter transformer |
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