CN201927457U - Main transformer of million kilowatt level nuclear power station - Google Patents
Main transformer of million kilowatt level nuclear power station Download PDFInfo
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- CN201927457U CN201927457U CN2010206538532U CN201020653853U CN201927457U CN 201927457 U CN201927457 U CN 201927457U CN 2010206538532 U CN2010206538532 U CN 2010206538532U CN 201020653853 U CN201020653853 U CN 201020653853U CN 201927457 U CN201927457 U CN 201927457U
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Abstract
The utility model relates to the technical field of equipment used in a nuclear power station, and discloses a main transformer of a million kilowatt level nuclear power station. The main transformer comprises an iron core, wherein the iron core comprises at least two of silicon-steel plate groups which are overlapped with one another, each silicon-steel plate group comprises at least two of silicon-steel plate small groups, and each silicon-steel plate small group comprises at least two of silicon-steel plates which are overlapped with one another in a stepping way. Compared with the prior art, the silicon-steel plates of the main transformer are overlapped with one another in a stepping way, so that the no-load loss, the no-load current and noise can be reduced on the premise that the transformer is guaranteed to normally run; and the transformer with the structure is easy to machine and is short in repair period, so that the accident for delaying the construction period can be avoided.
Description
Technical field
The utility model relates to the technical field of nuclear power plant equipment, more particularly, relates to a kind of million kilowatt nuclear power station owner transformer.
Background technology
Transformer is widely used in the nuclear power station, the iron core of existing transformer includes a plurality of silicon steel sheet groups, and the silicon steel sheet group bridging arrangements that interlock that adopt more, be that each silicon steel sheet group is made up of a plurality of shapes, measure-alike silicon steel sheet, and the shape and structure and the seaming position of two groups of adjacent silicon steel sheets are different, and the transformer of this kind structure has the excessive shortcoming of no-load loss, no-load current and noise.
In practice, No. 04 main transformer of mountain range Australia is found in the L102 overhaul about the other post flexural deformation 120mm of existing voltage adjustment of on-load switch-side, can't satisfy normal operation, what the iron core of this main transformer adopted is exactly staggered bridging arrangement, the core structure of the transformer before anti-revisionist as shown in Figure 1, iron core comprises several silicon steel sheet groups of mutual superposition, each silicon steel sheet group is by four identical silicon steel sheets 11 of geomery " to be formed; adjacent two silicon steel sheet group shape and structures and seaming position are different; transformer is reprocessed; in reprocessing; because old iron core exceeds standard in the process of laminate patch again; can't satisfy actual requirement, so iron core is changed in decision, but because existing each big production plant substantially all upgrades to production line, the production line after the upgrading is compared original production line variation has been taken place, and therefore can't cut out and the original staggered the same silicon steel sheet 11 of overlapping mode ".
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of million kilowatt nuclear power station owner transformer is provided, and this transformer noload losses, no-load current and noise are low and be easy to processing.
At above-mentioned a kind of million kilowatt nuclear power station owner transformer, the utility model is to realize like this, a kind of million kilowatt nuclear power station owner transformer, comprise iron core, described iron core comprises at least two overlapped silicon steel sheet groups, each described silicon steel sheet group comprises at least two silicon steel sheet groups, and each described silicon steel sheet group comprises the silicon steel sheet of at least two mutual steppings overlap joints.
Further, the silicon steel sheet of described silicon steel sheet group bottom has chamfering.
Further, described transformer also comprises folder and horizontal arm-tie, be provided with the insulation board that described folder and described horizontal arm-tie insulation are connected between described folder and the horizontal arm-tie, described insulation board is provided with blind hole, and is provided with oil groove in the end face that described insulation board is provided with described blind hole.
Further, also be provided with cushion block between described folder and the described horizontal arm-tie, and the distance between the described adjacent cushion block is consistent.
Further, also comprise upper yoke, and be provided with a cooling oil duct that described upper yoke and described horizontal arm-tie are insulated between described upper yoke and the horizontal arm-tie.
Further, also comprise the vertical arm-tie that can be connected, between described horizontal arm-tie and described vertical arm-tie, be provided with first collets that described horizontal arm-tie is connected with described vertical arm-tie insulation with described horizontal arm-tie insulation.
Further, the center pillar of described transformer includes two iron cores that insulate and connect mutually, is provided with second collets that described core insulation is connected between described iron core.
Further, also comprise cushion block and the coil that can link together with described cushion block, described coil has bottom plate, fixedlys connected by dielectric pin between described cushion block and the described coil bottom plate.
Further, also comprise the bandage that the center pillar of the other post that can be used for preventing described transformer and described transformer bends, described bandage is connected on described other post and the described center pillar by the colligation mode, and is spaced apart 200mm between each described bandage.
Compared with prior art, the silicon steel sheet of the transformer in the utility model adopts the stepping overlapping mode to overlap, thereby under the prerequisite of the normal operation that guarantees transformer, can reduce no-load loss and no-load current and noise, simultaneously, the transformer of this structure is easy to processing, and it is short that it reprocesses the phase, the accident of duration can not occur incuring loss through delay.
Description of drawings
Fig. 1 is the principle schematic of the overlapping mode of silicon steel sheet in the prior art;
Fig. 2 is the principle schematic of the stepping overlap joint of the silicon steel sheet that provides of the utility model embodiment;
Fig. 3 is the schematic perspective view of the collets that provide of the utility model embodiment;
Fig. 4 is the schematic perspective view of the collets that provide of the utility model embodiment;
Fig. 5 is the cross-sectional schematic that the vertical arm-tie in other column top that the utility model embodiment provides is connected with horizontal arm-tie.
Fig. 6 is the cross-sectional schematic that the utility model embodiment provides the insulation between folder beam and the arm-tie to connect;
Fig. 7 is the simplified schematic diagram of the earthing mode of transformer core in the prior art;
Fig. 8 is the simplified schematic diagram of the earthing mode of the transformer core that provides of the utility model embodiment.
Embodiment
In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
This use is novel to disclose a kind of million kilowatt nuclear power station owner transformer, comprise iron core, described iron core comprises at least two overlapped silicon steel sheet groups, each described silicon steel sheet group comprises at least two silicon steel sheet groups, and each described silicon steel sheet group comprises the silicon steel sheet of at least two mutual steppings overlap joints.
In the utility model, the silicon steel sheet of transformer adopts the stepping overlapping mode to overlap, thereby under the prerequisite of the normal operation that guarantees transformer, can reduce no-load loss and no-load current and noise, simultaneously, the transformer of this structure is easy to processing, and it is short that it reprocesses the phase, the accident of duration can not occur incuring loss through delay.
Below in conjunction with specific embodiment specific implementation of the present utility model is described in detail.
Please refer to Fig. 2～Fig. 4, be a preferred embodiment of the present utility model.
As shown in Figure 1, silicon steel sheet 11 for transformer in the prior art " the principle schematic of the staggered overlapping mode overlap joint of employing; promptly staggered overlapping mode; in the prior art; the iron core of transformer includes a plurality of silicon steel sheet groups; each silicon steel sheet group is made up of a plurality of shapes, measure-alike silicon steel sheet, and two groups of adjacent silicon steel sheets 11 " shape and structure and seaming position different, the transformer of this kind structure has the excessive shortcoming of no-load loss, no-load current and noise; And because existing each big production plant substantially all upgrades to the production line of transformer, production line after the upgrading is compared original production line variation has been taken place, all used production and processing line after the upgrading as the subordinate factory of AREVA group (Areva Ta group), after so the iron core of existing transformer goes wrong, the overlapping mode that production line after the upgrading can't cut out and have now the silicon steel sheet 11 of staggered overlapping mode "; incur loss through delay the duration from far away as processing then in some little processing factories; therefore, be badly in need of the silicon steel sheet 11 to the iron core of existing transformer " changes.
The transformer that present embodiment provides comprises iron core, and iron core comprises at least two overlapped silicon steel sheet groups, and each silicon steel sheet group comprises at least two silicon steel sheet groups, and each silicon steel sheet group comprises the silicon steel sheet 11 of at least two mutual stepping overlap joints.
Like this, the silicon steel sheet 11 of the iron core of transformer adopts the stepping overlapping mode to overlap, under the prerequisite of the normal operation that guarantees transformer, can reduce no-load loss and no-load current and noise, simultaneously, because existing each big production plant substantially all is the mode of production that adopts the stepping overlapping mode, thereby in time the iron core of transformer breaks down, also be easy to produce such iron core, it is short that it reprocesses the phase, the accident of duration can not occur incuring loss through delay.
Particularly, the shape of the silicon steel sheet 11 in each silicon steel sheet group, big or small identical.
Above-mentioned silicon steel sheet group and the relation between the silicon steel sheet group are to comprise and involved relation, and promptly the silicon steel sheet in the silicon steel sheet group is divided into several groups, and each group wherein is with regard to above-mentioned silicon steel sheet group.
In the present embodiment, each silicon steel sheet group of the iron core of transformer comprises six silicon steel sheet groups, and each silicon steel sheet group includes two shapes, big or small identical silicon steel sheet 11, but the length of each the silicon steel sheet group in the silicon steel sheet group is different, like this, just each silicon steel sheet group has comprised 12 silicon steel sheets 11.
As shown in Figure 2, it is the principle schematic that silicon steel sheet 11 adopts the stepping overlapping mode, the silicon steel sheet 11 of above-mentioned silicon steel sheet group is by the bottom overlap joint that steps in gradually, the silicon steel sheet 11 that is in silicon steel sheet group bottom has the wedge angle of exposure at its seaming position place, identical in order to guarantee the iron core after the coming of new with the overall dimension of the original iron core that need replace, thereby can realize the replacement of transformer core, in the slicing processes of carrying out silicon steel sheet 11, need this silicon steel sheet 11 that is in bottom is carried out chamfering, thereby this wedge angle that is exposed to the outside is removed, thereby the silicon steel sheet 11 of this bottom has chamfering at its seaming position place.
It is to be noted, though adopted the overlapping mode of the silicon steel sheet 11 of iron core to change the stepping overlapping mode into by staggered overlapping mode, variation has taken place in the mechanism of iron core, but, the silicon steel sheet 11 of minimum level step that in the iron core that adopts new overlapping mode overlap joint, has still kept the iron core of the staggered overlapping mode of existing employing, the silicon steel sheet 11 of this part still uses in the iron core that adopts stepping overlapping mode overlap joint, this is because this a part of silicon steel sheet 11 is for fear of causing that owing to the winding leakage flux surface local of iron core is overheated, its surface has groove narrowed width in period, the function that its use in new iron core can't influence new iron core still plays the surface local superheating phenomenon that can avoid causing owing to the winding leakage flux iron core.
The silicon steel sheet 11 of iron core is in the process of carrying out lamination, location for the silicon steel sheet 11 that guarantees mutual superposition, silicon steel sheet 11 is provided with location hole 111, this location hole 111 can be in the process of manufacture of silicon steel sheet 11, on production line, machine automatically, process, simple to operate, and experience shows that this location hole 111 can not have influence on the performance of iron core.
In the present embodiment, the quantity of the location hole 111 that is provided with on the silicon steel sheet 11 is two, and its diameter operated by rotary motion is about 30mm.
Between the clamping plate of transformer and horizontal arm-tie 13, be provided with insulation board 12, this insulation board 12 makes clamping plate be connected with horizontal arm-tie 13 insulation, as shown in Figure 3, be provided with blind hole 121 in this insulation board 12, be blind hole, the both ends of the surface that can not be communicated with insulation board 12, and the end face that insulation board 12 is provided with blind hole 121 is provided with oil groove 122.
In the present embodiment, this insulation board 12 is made for glass fiber material, and insulation board 12 is provided with two blind holes 121, and the length of oil groove 122 is 10mm, and width is 5mm.
As shown in Figure 4, be the clamping plate of the transformer that provides in the prior art and the insulation board 12 between the horizontal arm-tie 13 both ends of the surface of ", it is through hole that this insulation board 12 " is gone up the hole 121 that is provided with ", promptly is communicated with insulation board 12 ", and at insulation board 12 " on oil groove 122 is not set.
In the present embodiment, loosening phenomenon occurs, in actual installation,, can adjust, loosening phenomenon occurs to prevent insulation board 12 to this insulation board 12 according to the actual installation situation in order to prevent the collets between clamping plate and the horizontal arm-tie 13.
In addition, also be provided with cushion block between the folder of the transformer in the present embodiment and the horizontal arm-tie 13, and the distance of the cushion block between adjacent is always, particularly, between folder and horizontal arm-tie 13, be provided with a cushion block, and this cushion block is to form through the hot working manufacturing every 200mm.
In the present embodiment, be provided with cooling oil duct between upper yoke and horizontal arm-tie 13, this cooling oil duct can make upper yoke and 13 insulation of horizontal arm-tie, and it is different fully to be provided with insulating paper between this structure and upper yoke of the prior art and the horizontal arm-tie 13.
As shown in Figure 6, the vertical arm-tie 14 of the other column top of transformer is connected for insulation with horizontal arm-tie 13, it is different between vertical arm-tie in the existing transformer and the horizontal arm-tie for directly connecting, particularly, between vertical arm-tie 14 and horizontal arm-tie 13, be provided with first collets 15, these first collets 15 can make vertical arm-tie 14 be connected with horizontal arm-tie 13 insulation, and the thickness of these first collets 15 is that 0.5mm is thick.
In the present embodiment, the center pillar of transformer includes the iron core of two semi-insulating connections, particularly, second collets that this two halves core insulation is connected are set between this two halves iron core, in the prior art, the length of the collets between the two halves iron core of center pillar is 1549mm, but the length of second collets in the present embodiment is 1565mm.
In addition.In the present embodiment, all increase by one at the upper yoke of above-mentioned center pillar two halves iron core and lower yoke and prevent to scurry sheet.
In the present embodiment, iron core in the fuel tank left and right sides of transformer bottom supports and is provided with cross-over block, and this cross-over block is provided with the hole, and the degree of depth in hole is 5mm, it improves with respect to prior art, and the degree of depth in the hole on the cross-over block of the prior art only is 2mm.
In an embodiment, as much as possible this cross-over block is done greatly, thereby the contact area of increase cross-over block prevents that the phenomenon that gets loose from appearring in cross-over block.
In the present embodiment, transformer also comprises coil and backing plate, coil is provided with bottom plate, backing plate is fixed together by the bottom plate of dielectric pin and this coil, its fixedly connected mode can have multiple choices, for example, on the bottom plate of backing plate and coil, all be processed with the installing hole that cooperatively interacts respectively, dielectric pin is plugged in this installing hole, and and installing hole interference fit, thereby realizing fixedlying connected of backing plate and bottom plate, can certainly be other connected mode, then can as long as realization is fixed together the bottom plate of backing plate and coil by dielectric pin.
In the present embodiment; for buckling phenomenon appears in the iron core that prevents other post; transformer includes bandage, and bandage is connected on the other post, wherein by the colligation mode; and be spaced apart 200mm between every bandage; in actual use, the bucking coil annex on other post top can carry out colligation according to actual conditions, in the present embodiment; the width of the insulation protection cardboard of bandage bottom is set to 80mm, and the width that metal latch is detained the insulating board of portion is 120mm.
In order to prevent that buckling phenomenon from appearring in the iron core in the center pillar, the colligation mode of center pillar and the colligation mode of other post are similar, bandage also is connected on the center pillar by the colligation mode, and the interval between every bandage also is 200mm, and keep somewhere at the top of center pillar the length of 300mm, so that can install the iron yoke in middle column top.
In the present embodiment, after other post and center pillar adopted bandage to carry out colligation, the surface of other post and center pillar was all carried out gluing and is handled.
As shown in Figure 5, folder beam (clamping beam) cross-sectional schematic that insulation is connected with arm-tie (cross bar) for transformer wherein has some with respect to the improvement that transformer of the prior art is done, and is as follows:
1, increase has anti-back locking plate 21 at bolt 23 places of compressing;
2, also increase at anti-back locking plate 21 places metallic gasket 22 is arranged;
3, on the surface of bolt 23, be coated with the epoxy resins insulation layer, replaced the method for on-the-spot bag insulating paper in the prior art;
4, compare and prior art, suitably add stay bolt 23.
As shown in Figure 7, be the earthing mode of existing transformer, the upper clamping piece 16 and the lower clamping piece 17 of the same side of iron core couple together by sheet metal 18, and then ground connection.
As shown in Figure 8, be the earthing mode of the transformer of present embodiment, the upper clamping piece 16 of its iron core couples together with sheet metal 18 each other, and then ground connection; Also couple together between the lower clamping piece 17 with sheet metal 18, and then ground connection.
In the present embodiment, above-mentioned sheet metal 18 is specially copper sheet.
In addition, in the present embodiment, the material of silicon steel sheet 11 also changes with respect to prior art, employing be the 27ZH110 of NIPPON STEEL company, be different from M4 * 27 of UGO of the prior art company, the technical parameter of 27ZH110 is: density is 7650Kg/m
3, Loss at 1.7T (50Hz) is 1.1W/Kg max, and Loss at 1.5T (50Hz) is 0.74W/Kg max, and B800 is 1.88T minimum, and this technical parameter is different from the technical parameter of M4 * 27, and the technical parameter of M4 * 27 is: density is 7650Kg/m
3, Loss at1.7T (50Hz) is 1.30W/Kg max, and Loss at 1.5T (50Hz) is 0.85W/Kg max, and B800 is 1.78T minimum.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (9)
1. million kilowatt nuclear power station owner transformer, comprise iron core, described iron core comprises at least two overlapped silicon steel sheet groups, it is characterized in that, each described silicon steel sheet group comprises at least two silicon steel sheet groups, and each described silicon steel sheet group comprises the silicon steel sheet of at least two mutual steppings overlap joints.
2. a kind of million kilowatt nuclear power station owner transformer as claimed in claim 1 is characterized in that the silicon steel sheet of described silicon steel sheet group bottom has chamfering.
3. a kind of million kilowatt nuclear power station owner transformer as claimed in claim 1, it is characterized in that, described transformer also comprises folder and horizontal arm-tie, be provided with the insulation board that described folder and described horizontal arm-tie insulation are connected between described folder and the horizontal arm-tie, described insulation board is provided with blind hole, and is provided with oil groove in the end face that described insulation board is provided with described blind hole.
4. a kind of million kilowatt nuclear power station owner transformer as claimed in claim 3 is characterized in that, also is provided with cushion block between described folder and the described horizontal arm-tie, and the distance between the described adjacent cushion block is consistent.
5. as claim 3 or 4 described a kind of million kilowatt nuclear power station owner transformers, it is characterized in that, also comprise upper yoke, and be provided with a cooling oil duct that described upper yoke and described horizontal arm-tie are insulated between described upper yoke and the horizontal arm-tie.
6. as claim 3 or 4 described a kind of million kilowatt nuclear power station owner transformers, it is characterized in that, also comprise the vertical arm-tie that can be connected, between described horizontal arm-tie and described vertical arm-tie, be provided with first collets that described horizontal arm-tie is connected with described vertical arm-tie insulation with described horizontal arm-tie insulation.
7. a kind of million kilowatt nuclear power station owner transformer as claimed in claim 1 is characterized in that, the center pillar of described transformer includes two iron cores that insulate and connect mutually, is provided with second collets that described core insulation is connected between described iron core.
8. a kind of million kilowatt nuclear power station owner transformer as claimed in claim 1, it is characterized in that, also comprise cushion block and the coil that can link together with described cushion block, described coil has bottom plate, fixedlys connected by dielectric pin between described cushion block and the described coil bottom plate.
9. a kind of million kilowatt nuclear power station owner transformer as claimed in claim 1, it is characterized in that, also comprise the bandage that the center pillar of the other post that can be used for preventing described transformer and described transformer bends, described bandage is connected on described other post and the described center pillar by the colligation mode, and is spaced apart 200mm between each described bandage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206538532U CN201927457U (en) | 2010-12-10 | 2010-12-10 | Main transformer of million kilowatt level nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206538532U CN201927457U (en) | 2010-12-10 | 2010-12-10 | Main transformer of million kilowatt level nuclear power station |
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| Publication Number | Publication Date |
|---|---|
| CN201927457U true CN201927457U (en) | 2011-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206538532U Expired - Lifetime CN201927457U (en) | 2010-12-10 | 2010-12-10 | Main transformer of million kilowatt level nuclear power station |
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| Country | Link |
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| CN (1) | CN201927457U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354153A (en) * | 2013-06-27 | 2013-10-16 | 宜兴市兴益特种变压器有限公司 | Iron core structure of electro-slag furnace transformer |
| CN103559983A (en) * | 2013-09-23 | 2014-02-05 | 保定保菱变压器有限公司 | Low-noise SF6 gas insulated transformer and manufacturing method thereof |
-
2010
- 2010-12-10 CN CN2010206538532U patent/CN201927457U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354153A (en) * | 2013-06-27 | 2013-10-16 | 宜兴市兴益特种变压器有限公司 | Iron core structure of electro-slag furnace transformer |
| CN103559983A (en) * | 2013-09-23 | 2014-02-05 | 保定保菱变压器有限公司 | Low-noise SF6 gas insulated transformer and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Lingao Nuclear Power Co., Ltd. Assignor: China Guangdong Nuclear Power Group Co., Ltd.|Daya Bay Nuclear Power Operation and Management Co., Ltd Contract record no.: 2012440020366 Denomination of utility model: Main transformer of million kilowatt level nuclear power station Granted publication date: 20110810 License type: Exclusive License Record date: 20121212 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA GENERAL NUCLEAR GROUP CO., LTD. Free format text: FORMER NAME: CHINA GUANGDONG NUCLEAR POWER GROUP CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Shenzhen science and technology building, No. 1001 Futian District Road, Shenzhen city in Guangdong province 518031 17-19 floor Patentee after: China General Nuclear Power Corporation Patentee after: Dayawan Nuclear Power Running Management Co., Ltd. Address before: Shenzhen science and technology building, No. 1001 Futian District Road, Shenzhen city in Guangdong province 518031 17-19 floor Patentee before: China Guangdong Nuclear Power Group Co., Ltd. Patentee before: Dayawan Nuclear Power Running Management Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110810 |
|
| CX01 | Expiry of patent term |