CN104652468B - General transformer foundation and construction method - Google Patents
General transformer foundation and construction method Download PDFInfo
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- CN104652468B CN104652468B CN201510080950.4A CN201510080950A CN104652468B CN 104652468 B CN104652468 B CN 104652468B CN 201510080950 A CN201510080950 A CN 201510080950A CN 104652468 B CN104652468 B CN 104652468B
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- steel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
General transformer foundation provided by the invention and construction method, relate to electric field, wherein general transformer foundation comprises raft plate, H profile steel and stopping composition, described raft plate is embedded in the bottom of main transformer oil basin, a plane of described H profile steel is fixed on described raft plate, another plane of described H profile steel stretches into the inside of described main transformer oil basin, and many described H profile steel are arranged side by side, and are provided with stopping composition in the notch of described H profile steel. There is versatility widely, it is applicable to major part transformer, general transformer foundation easy construction simultaneously, short construction period.
Description
Technical field
The present invention relates to electric field, specifically, it relates to a kind of general transformer foundation and construction method.
Background technology
Transformer foundation is arranged on the structure played a supportive role by transformer below transformer, existing transformer foundation is the board-like rib type basis of onsite concrete, need transformer and other the detail file of carrying just can complete transformer foundation design, desin speed is slower, and not there is versatility, if after calculating error or changing transformer, transformer foundation can only be thrown aside and recalculate and build, and entirety is pouring structure, need to wait that concrete just can use after solidifying completely, construction is complicated, simultaneously long construction period.
Summary of the invention
In view of this, the present invention provides a kind of general transformer foundation and construction method, to improve the problems referred to above.
General transformer foundation provided by the invention comprises raft plate, H profile steel and stopping composition, described raft plate is embedded in the bottom of main transformer oil basin, a plane of described H profile steel is fixed on described raft plate, another plane of described H profile steel stretches into the inside of described main transformer oil basin, many described H profile steel is arranged side by side, and is provided with stopping composition in the notch of described H profile steel.
Above-described general transformer foundation, preferably, described general transformer foundation also comprises H profile steel basis and buries steel bar in advance, multiple described H profile steel basis bury in advance steel bar side by side parallel laid on described raft plate, described H profile steel basis is buried steel bar in advance and is fixedly connected with by burying reinforcing bar in advance with described raft plate, and the direction that steel bar is buried on described H profile steel basis in advance is vertical with the bearing of trend of described H profile steel. The described H profile steel basis being embedded in raft plate surface is utilized to bury steel bar in advance, H profile steel is connected with raft plate, described H profile steel basis is buried steel bar in advance and is embedded in raft plate top surface and realizes described H profile steel basis by burying reinforcing bar in advance and bury fixing of steel bar and raft plate in advance, then H profile steel is welded on described H profile steel basis and buries in advance on steel bar, improve H profile steel and the bonding force of raft plate, improve integrally-built stability, make the combination of H profile steel and raft plate more firm.
Above-described general transformer foundation, it may be preferred that described H profile steel basis is buried steel bar in advance and is provided with many grooves for holding described H profile steel arranged side by side. Utilize the groove pre-set, H profile steel can be made to embed described H profile steel basis on the one hand to bury in advance on steel bar, improve H profile steel and the basic bonding strength burying steel bar in advance of H profile steel, the combination making H profile steel and H profile steel basis bury steel bar in advance is more firm, and on the other hand, many grooves are set up in parallel, different grooves can be selected according to different transformers, control the width between two adjacent H profile steel, make H profile steel and H profile steel basis bury the location and installation between steel bar in advance more quick, convenient.
Above-described general transformer foundation, preferably, described general transformer foundation also comprises transformer foundation built-in fitting, and multiple described transformer foundation built-in fitting is welded in described H profile steel, and multiple described transformer foundation built-in fitting is along the axially interval setting successively of described H profile steel. By transformer foundation built-in fitting, transformer is made to turn into spot welding with welding of general transformer foundation, solder joint is few, decrease the area needing welding, facilitate dismounting and the movement of solder joint later simultaneously, raising transformer and the stability that general transformer foundation is combined, be convenient to transformer and general transformer foundation carries out dismounting again and fixes.
Above-described general transformer foundation, it may be preferred that described transformer foundation built-in fitting is steel plate. Adopt steel plate as built-in fitting basis, good welding performance, manufacture conveniently simultaneously, with low cost. First by steel plate leveling on raft plate, and then being placed on steel plate by H profile steel to carry out leveling, owing to the planeness of steel plate is good, H profile steel leveling on steel plate is more convenient than H profile steel leveling on raft plate, and leveling speed is faster.
Above-described general transformer foundation, it may be preferred that described general transformer foundation also comprises deep floor, multiple described deep floor erects to being arranged in described notch, and the edge of described deep floor is connected with described notch. Utilizing the deep floor in H profile steel notch to improve the structural strength of H profile steel, H profile steel is more stable is firmly less likely to occur deformation, it is possible to bear the weight load of more transformer.
Above-described general transformer foundation, it may be preferred that described stopping composition is cement-based grout material. Cement-based grout material setting time is short, and molding time is fast, is conducive to shortening the duration, buys easily simultaneously, and to the requirement of intensity after filling can be met.
Above-described general transformer foundation, it may be preferred that described general transformer foundation also comprises the pre-embedded bolt for fixing H profile steel, described pre-embedded bolt passes the plane being connected with described raft plate of described H profile steel and is fixedly connected with described raft plate. Utilizing pre-embedded bolt H profile steel and raft plate to be fixed, it is not necessary to use weldprocedure just can H profile steel and raft plate be fixed, adopt bolt to be fixed relatively employing and be welded and fixed easy to operate, the combination of H profile steel and raft plate is more firm simultaneously, and structural strength is higher.
General transformer foundation construction method described in more than one, comprising:
Weight load scope according to transformer, selects and makes raft plate;
Described raft plate is embedded in main transformer oil basin bottom part;
According to place or design to the height needs of described transformer, select the H profile steel of corresponding height;
Described H profile steel plane is fixed on described raft plate;
The notch stopping composition of described H profile steel is built and fills with real.The general transformer foundation built by present method, builds shaping speed fast, and short construction period, easy construction, has versatility widely.
Above-described general transformer foundation construction method, it may be preferred that described described H profile steel is fixed on described raft plate before also comprise, raft plate buries H profile steel basis in advance and buries steel bar in advance. Bury steel bar in advance by H profile steel basis H profile steel to be connected with raft plate so that the connection of H profile steel and raft plate is more prone to firmly.
Relative to prior art, general transformer foundation provided by the invention and construction method comprise following useful effect: general transformer foundation provided by the invention utilizes raft plate to bear the weight load of transformer, the weight load of transformer is then delivered on raft plate by H profile steel, a plane of H profile steel and raft plate are fixed, another plane of H profile steel and transformer are fixed, by selecting the height of the H profile steel of different size, realize the adjustment that general transformer foundation is carried out different heights, then in the notch of H profile steel, stopping composition is filled, H profile steel and stopping composition is made to form rib, improve the intensity of H profile steel, the rib that H profile steel and stopping composition are formed can bear the weight of transformer, ensure that general transformer foundation is to the supporting role of transformer, and change moving up and down of transformer by changing the height of H profile steel, make before the concrete data parameters of transformer is formulated out, just construction can be built by general transformer foundation, there is versatility widely, it is applicable to major part transformer, general transformer foundation easy construction simultaneously, short construction period, can try to be the first like this and build general transformer foundation, then on general transformer foundation, it is welded and fixed transformer, transformer is produced and then the concrete parameter according to transformer designs than traditional first manufacture, the construction period building general transformer foundation is shorter, cost-saving.
Accompanying drawing explanation
In order to the more clearly bright embodiment of the present invention or technical scheme of the prior art, it is briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the cross-sectional schematic of the general transformer foundation that first embodiment of the invention provides;
Fig. 2 is the schematic top plan view of the general transformer foundation that Fig. 1 provides;
Fig. 3 is the cross-sectional schematic of the general transformer foundation that second embodiment of the invention provides;
Fig. 4 is the cross-sectional schematic of the general transformer foundation that third embodiment of the invention provides;
Fig. 5 is the schematic top plan view of the general transformer foundation that Fig. 4 provides;
Fig. 6 is the cross-sectional schematic of the general transformer foundation that fourth embodiment of the invention provides.
Wherein, Reference numeral and name of parts be referred to as between corresponding relation as follows: raft plate 101, H profile steel 102, stopping composition 103, steel bar 104 is buried on H profile steel basis in advance, deep floor 105, groove 106, transformer foundation built-in fitting 107, pre-embedded bolt 108.
Embodiment
Transformer foundation is arranged on the structure played a supportive role by transformer below transformer, existing transformer foundation is the board-like rib type basis of onsite concrete, discovery is studied for a long time through researchist, existing transformer foundation needs the transformer of carrying and other detail file just can complete transformer foundation design, desin speed is slower, and not there is versatility, if after calculating error or changing transformer, transformer foundation can only be thrown aside and recalculate and build, and entirety is pouring structure, need to wait that concrete just can use after solidifying completely, construction is complicated, long construction period simultaneously.
The present invention provides a kind of general transformer foundation and construction method to improve the problems referred to above.
Below by specific embodiment and by reference to the accompanying drawings the present invention is described in further detail.
In the present invention, first, second, third, etc. are difference signal, are not limit.
Fig. 1 is the cross-sectional schematic of the general transformer foundation that first embodiment of the invention provides; Fig. 2 is the schematic top plan view of the general transformer foundation that Fig. 1 provides; As shown in Figure 1-2, the general transformer foundation that first embodiment of the invention provides comprises raft plate 101, H profile steel 102 and stopping composition 103, raft plate 101 is embedded in the bottom of main transformer oil basin, a plane of H profile steel 102 is fixed on raft plate 101, another plane of H profile steel 102 stretches into the inside of main transformer oil basin, and many H profile steel 102 are arranged side by side, and are provided with stopping composition 103 in the notch of H profile steel 102.
The main transformer oil basin of general transformer foundation provided by the invention is for collecting the leakage of oil from transformer, bottom surface and the raft plate 101 of H profile steel 102 are fixed, end face and the transformer of H profile steel 102 are fixed, by selecting the height of the H profile steel 102 of different size, realize the adjustment that general transformer foundation is carried out different heights, then in the notch of H profile steel 102, fill stopping composition 103, H profile steel 102 and stopping composition 103 is made to form rib, improve the intensity of H profile steel 102, the rib that H profile steel 102 and stopping composition 103 are formed can bear the weight of transformer, ensure that general transformer foundation is to the supporting role of transformer.
Owing to being the weight load utilizing raft plate 101 to bear transformer in whole general transformer foundation, the weight load of transformer is delivered on raft plate 101 by H profile steel 102, therefore to the load-bearing not too big requirement of H profile steel 102. Wherein raft plate 101 is that the weight range according to transformer carries out selecting making, can just can carry out building and burying underground before the detailed data of transformer draw, then according to on-the-spot needs, select corresponding H profile steel 102, being fixed on raft plate 101 by H profile steel 102, H profile steel 102 and H profile steel 102 notch inner filling material 103 have enough intensity and are delivered on raft plate 101 by the weight load of transformer to be unlikely to distortion after combining.
Because general transformer foundation is compared with traditional transformer foundation, can just carry out constructing before transformer specific design data are out and utilize H profile steel 102 to instead of concrete rib, avoid the use of general transformer foundation to need to wait concrete solidifying, therefore the construction period of general transformer foundation is shorter, and changes moving up and down of transformer by changing the height of H profile steel 102. Make before the concrete data parameters of transformer is formulated out, just can advanced person work with transformer foundation construction construction, there is versatility widely, it is applicable to major part transformer, general transformer foundation easy construction simultaneously, short construction period, can try to be the first like this and build general transformer foundation, then welding transformer on general transformer foundation, than traditional first manufacture produce transformer and then the concrete parameter according to transformer to design, build the construction period of transformer foundation shorter, cost-saving.
Fig. 3 is the cross-sectional schematic of the general transformer foundation that second embodiment of the invention provides; As shown in Figure 3, the general transformer foundation that second embodiment of the invention provides is on the basis of the first embodiment, further, general transformer foundation also comprises H profile steel basis and buries steel bar 104 in advance, multiple H profile steel basis bury in advance steel bar 104 side by side parallel laid on raft plate 101, H profile steel basis is buried steel bar 104 in advance and is fixedly connected with by burying reinforcing bar in advance with raft plate 101, and the direction that steel bar 104 is buried on H profile steel basis in advance is vertical with the bearing of trend of H profile steel 102.
The H profile steel basis being embedded in raft plate 101 surface is utilized to bury steel bar 104 in advance, raft plate 101 is connected with H profile steel 102, the reinforcing bar that buries in advance that steel bar 104 is buried on H profile steel basis in advance is embedded in raft plate 101 end face, then H profile steel 102 is welded on H profile steel basis and buries on steel bar 104 in advance, improve the bonding force of H profile steel 102 with raft plate 101, improve integrally-built stability, make H profile steel 102 more firm with the combination of raft plate 101.
Simultaneously, H profile steel basis is buried steel bar 104 in advance and is arranged at raft plate 101 surface parallel, H profile steel 102 can be facilitated like this to select on raft plate 101 surface, can according to different needs, it is welded on H profile steel basis and buries the different positions on steel bar 104 in advance, it is possible to realize presetting of H profile steel 102 adjustment in the horizontal direction and different positions.
Further, general transformer foundation also comprises deep floor 105, and multiple deep floor 105 erects to being arranged in notch, and the edge of deep floor 105 is connected with notch. The deep floor 105 in the notch of H profile steel 102 is utilized to improve the structural strength of H profile steel 102 so that H profile steel 102 is more stable is firmly less likely to occur deformation, it is possible to bear the weight load of more transformer.
Fig. 4 is the cross-sectional schematic of the general transformer foundation that third embodiment of the invention provides;
Fig. 5 is the schematic top plan view of the general transformer foundation that Fig. 4 provides, as illustrated in figures 4-5, the general transformer foundation that third embodiment of the invention provides is on the basis of the first embodiment, and further, H profile steel basis is buried steel bar 104 in advance and is provided with many grooves 106 for holding H profile steel 102 arranged side by side. utilize the groove 106 pre-set, H profile steel 102 can be made to embed H profile steel basis on the one hand buries on steel bar 104 in advance, improve H profile steel 102 bonding strength of in advance burying steel bar 104 basic with H profile steel, the combination making H profile steel 102 and H profile steel basis bury steel bar 104 in advance is more firm, and then improve the supporting capacity of general transformer foundation, on the other hand, many groove 106 is set up in parallel, different grooves 106 can be selected according to different transformers, width between control H profile steel 102, the location and installation making H profile steel 102 and H profile steel basis bury steel bar 104 in advance is quicker, convenient.
Transformer welds with being fixed as of H profile steel 102, if transformer is directly welded with H profile steel 102, owing to transformer is bigger with contact surface when welding of H profile steel 102, solder joint is many, being not easy firm welding, therefore, general transformer foundation also comprises transformer foundation built-in fitting 107, multiple transformer foundation built-in fitting 107 is welded in H profile steel 102, and multiple transformer foundation built-in fitting 107 is along the axially interval setting successively of H profile steel 102.
By transformer foundation built-in fitting 107, transformer is made to turn into spot welding with welding of general transformer foundation, solder joint is few, decrease the area needing welding, facilitate dismounting and the movement of solder joint later simultaneously, raising transformer and the stability that general transformer foundation is combined, be convenient to transformer and general transformer foundation is fixed. In the present embodiment, it may be preferred that transformer foundation built-in fitting 107 is steel plate. Adopt steel plate as transformer foundation built-in fitting 107, good welding performance, manufacture conveniently simultaneously, with low cost. First by steel plate leveling on raft plate 101, and then being placed on steel plate by H profile steel 102 to carry out leveling, owing to the planeness of steel plate is good, H profile steel 102 leveling on steel plate is more convenient than H profile steel leveling on raft plate 101, and leveling speed is faster.
Further, it may be preferred that stopping composition 103 is cement-based grout material. Cement-based grout material setting time is short, and shaping speed is fast, is conducive to shortening the duration, buys easily simultaneously, and to the requirement of strength of stopping composition 103 when can meet filling.
Fig. 6 is the cross-sectional schematic of the general transformer foundation that fourth embodiment of the invention provides. As shown in Figure 6, the general transformer foundation that fourth embodiment of the invention provides is on the basis of the first embodiment, further, general transformer foundation also comprises the pre-embedded bolt 108 for fixing H profile steel 102, and pre-embedded bolt 108 is through the bottom surface insertion raft plate 101 of H profile steel 102. Utilizing the constructional feature of H profile steel 102, one end of pre-embedded bolt 108, through the bottom surface of H profile steel 102, is embedded in raft plate 101, it is not necessary to use weldprocedure just can H profile steel 102 and raft plate 101 be fixed. Adopting bolt to be fixed relatively employing is welded and fixed easy to operate, makes H profile steel 102 be combined with raft plate 101 more firm simultaneously, and structural strength is higher.
Fifth embodiment of the invention provides the general transformer foundation construction method that the first embodiment provides, and comprising:
Weight load scope according to transformer, selects and makes raft plate 101;
Raft plate 101 is embedded in main transformer oil basin bottom part;
According to place or design to the height needs of transformer, select the H profile steel 102 of corresponding height;
H profile steel 102 is fixed on raft plate 101;
The notch stopping composition 103 of H profile steel 102 is built and fills with real.
In the general transformer foundation construction method that the present embodiment provides, owing to whole general transformer foundation being the weight load utilizing raft plate 101 to bear transformer, the weight load of transformer is delivered on raft plate 101 by H profile steel 102, therefore to the load-bearing not too big requirement of H profile steel 102.
Wherein raft plate 101 is that the weight range according to transformer carries out selecting making, just can be able to build before the detailed data of transformer draw, it is embedded in main transformer oil basin again, then according to on-the-spot needs, select corresponding H profile steel 102, then H profile steel 102 is fixed on raft plate 101, finally, fill in H profile steel 102 notch with stopping composition 103, make H profile steel 102 have sufficient intensity and the weight load of transformer is delivered on raft plate 101, avoid H profile steel 102 to be out of shape.
Because general transformer foundation is compared with traditional transformer foundation, can just carry out constructing before transformer specific design data are out and utilize H profile steel 102 to instead of concrete rib, avoid the use of general transformer foundation to need to wait concrete solidifying, general transformer foundation is built therefore, it is possible to try to be the first, then on general transformer foundation, it is welded and fixed transformer, than the concrete parameter first determining transformer, the construction period designing, building transformer foundation again is shorter, cost-saving.
The general transformer foundation construction method that sixth embodiment of the invention provides, comprising:
Weight load scope according to transformer, selects and makes raft plate 101;
Raft plate 101 is embedded in main transformer oil basin bottom part;
According to place or design to the height needs of transformer, select the H profile steel 102 of corresponding height;
Raft plate 101 buries H profile steel basis in advance and buries steel bar 104 in advance;
By H profile steel basis, H profile steel 102 is buried steel bar 104 in advance is fixed on raft plate 101;
The notch stopping composition 103 of H profile steel 102 is built and fills with real.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a general transformer foundation, it is characterized in that, comprise raft plate, H profile steel and stopping composition, described raft plate is embedded in the bottom of main transformer oil basin, a plane of described H profile steel is fixed on described raft plate, another plane of described H profile steel stretches into the inside of described main transformer oil basin, many described H profile steel is arranged side by side, it is provided with stopping composition in the notch of described H profile steel, described general transformer foundation also comprises H profile steel basis and buries steel bar in advance, multiple described H profile steel basis bury in advance steel bar side by side parallel laid on described raft plate, described H profile steel basis is buried steel bar in advance and is fixedly connected with by burying reinforcing bar in advance with described raft plate, the direction that steel bar is buried on described H profile steel basis in advance is vertical with the bearing of trend of described H profile steel, described stopping composition is cement-based grout material, described H profile steel basis is buried steel bar in advance and is provided with many grooves for holding described H profile steel arranged side by side.
2. general transformer foundation according to claim 1, it is characterized in that, described general transformer foundation also comprises transformer foundation built-in fitting, multiple described transformer foundation built-in fitting is welded in described H profile steel, and multiple described transformer foundation built-in fitting is along the axially interval setting successively of described H profile steel.
3. general transformer foundation according to claim 2, it is characterised in that, described transformer foundation built-in fitting is steel plate.
4. general transformer foundation according to claim 1, it is characterised in that, described general transformer foundation also comprises deep floor, and multiple described deep floor erects to being arranged in described notch, and the edge of described deep floor is connected with described notch.
5. general transformer foundation according to claim 1, it is characterized in that, described general transformer foundation also comprises the pre-embedded bolt for fixing H profile steel, and described pre-embedded bolt passes the plane being connected with described raft plate of described H profile steel and is fixedly connected with described raft plate.
6. general transformer foundation construction method described in a claim 1-5 any one, it is characterised in that, comprising:
Weight load scope according to transformer, selects and makes raft plate;
Described raft plate is embedded in main transformer oil basin bottom part;
According to place or design to the height needs of described transformer, select the H profile steel of corresponding height;
Described H profile steel plane is fixed on described raft plate;
The notch stopping composition of described H profile steel is built and fills with real;
Described described H profile steel is fixed on described raft plate before also comprise, raft plate buries H profile steel basis in advance and buries steel bar in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510080950.4A CN104652468B (en) | 2015-02-15 | 2015-02-15 | General transformer foundation and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510080950.4A CN104652468B (en) | 2015-02-15 | 2015-02-15 | General transformer foundation and construction method |
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| Publication Number | Publication Date |
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| CN104652468A CN104652468A (en) | 2015-05-27 |
| CN104652468B true CN104652468B (en) | 2016-06-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108316337A (en) * | 2018-04-10 | 2018-07-24 | 上海电力设计院有限公司 | Integral prefabricated assembled main transformer foundation and oil pit structure for indoor substation |
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| CN201891127U (en) * | 2010-11-23 | 2011-07-06 | 中国矿业大学 | Deformation-resistant main transformer foundation for step-down station of power transmission station in coal subsidence area |
| JP2011247072A (en) * | 2010-04-27 | 2011-12-08 | Marutaka Kogyo Inc | Installation foundation and construction method thereof |
| CN202899161U (en) * | 2012-11-22 | 2013-04-24 | 浙江浙电经济技术研究院 | General type main transformer foundation |
| CN204456172U (en) * | 2015-02-15 | 2015-07-08 | 成都城电电力工程设计有限公司 | General-purpose transformer basis |
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2015
- 2015-02-15 CN CN201510080950.4A patent/CN104652468B/en active Active
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| JP2011247072A (en) * | 2010-04-27 | 2011-12-08 | Marutaka Kogyo Inc | Installation foundation and construction method thereof |
| CN201891127U (en) * | 2010-11-23 | 2011-07-06 | 中国矿业大学 | Deformation-resistant main transformer foundation for step-down station of power transmission station in coal subsidence area |
| CN202899161U (en) * | 2012-11-22 | 2013-04-24 | 浙江浙电经济技术研究院 | General type main transformer foundation |
| CN204456172U (en) * | 2015-02-15 | 2015-07-08 | 成都城电电力工程设计有限公司 | General-purpose transformer basis |
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