CN117685869A - Device for detecting winding deformation by reactance method before assembling transformer body - Google Patents
Device for detecting winding deformation by reactance method before assembling transformer body Download PDFInfo
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- CN117685869A CN117685869A CN202410147176.3A CN202410147176A CN117685869A CN 117685869 A CN117685869 A CN 117685869A CN 202410147176 A CN202410147176 A CN 202410147176A CN 117685869 A CN117685869 A CN 117685869A
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- iron core
- iron yoke
- reactance
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004804 winding Methods 0.000 title claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 227
- 229910052742 iron Inorganic materials 0.000 claims abstract description 90
- 230000008093 supporting effect Effects 0.000 claims description 5
- 230000002146 bilateral effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 7
- 238000011418 maintenance treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Abstract
The invention belongs to the technical field of transformers, and particularly discloses a device for detecting winding deformation by a reactance method before transformer body assembly, which comprises iron core columns, lower iron yokes, upper iron yokes and hydraulic lifting devices, wherein the iron core columns are symmetrically arranged on two sides of each lower iron yoke, each side of each iron core column is provided with a core column binding belt for fixing, a transformer low-voltage reactance tester is arranged on one side of the iron core column, an upper iron yoke is arranged above the iron core column, the output end of each hydraulic lifting device is fixed below the corresponding upper iron yoke, and the tail end of each hydraulic lifting device is fixedly provided with an electric trolley; the method comprises the steps of detecting single-phase low-voltage short-circuit reactance before assembling the body, so that the transverse ratio is carried out, judging whether the attention value requirement in DL/T1093-2018 can be met, if not, processing before assembling the body can be carried out; there is a phenomenon that a higher proportion cannot meet the attention value of the transversal ratio in DL/T1093-2018 in transformer production.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a device for detecting winding deformation by a reactance method before transformer body assembly.
Background
The transformer is a device for converting ac voltage, current and impedance, and when ac current is applied to the primary coil, ac magnetic flux is generated in the core or core, so that voltage or current is induced in the secondary coil. The transformer is composed of iron core or magnetic core and coil with two or more windings, wherein the winding connected with power source is called primary winding and the other winding is called secondary winding.
The reactance method detection judgment guide rule of the power industry standard DL/T1093-2018 power transformer winding deformation has clear requirements on detection methods, judgment methods and attention values. Note that there are differences between the values of the same parameter in the vertical ratio compared to the original data and the last test value and differences between the values of the three single phases of the same parameter in the horizontal ratio. The reactance method winding deformation detection transverse ratio value of some power transformers in factory tests does not meet the attention value requirement in DL/T1093-2018. At this time, the transformer is required to be disassembled and overhauled, and serious property loss is caused.
Disclosure of Invention
The invention aims to provide a device for detecting winding deformation by a reactance method before assembling a transformer body, so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the device for detecting winding deformation by adopting a reactance method before transformer body assembly comprises iron core columns, lower iron yokes, upper iron yokes and hydraulic lifting devices, wherein the iron core columns are symmetrically arranged on two sides of the lower iron yokes, the lower iron yokes and the iron core columns form a U-shaped iron core, each side of the iron core columns is provided with a core column binding belt for fixing, a transformer low-voltage reactance tester is arranged on one side of the iron core column, the upper iron yokes are arranged above the iron core columns, the output ends of the hydraulic lifting devices are fixed below the upper iron yokes, and the tail ends of the hydraulic lifting devices are fixedly provided with electric trolleys;
the invention can realize the detection of the single-phase low-voltage short-circuit reactance before the assembly of the body, so as to carry out the transverse ratio and judge whether the attention value requirement in DL/T1093-2018 can be met or not, if not, the invention can be processed before the assembly of the body. At present, the detection of the low-voltage short-circuit reactance is carried out in a transformer factory test, and if the attention value in DL/T1093-2018 can not be met, the disassembly maintenance treatment of the transformer is needed. The transformer body is assembled to a transformer test, and the following procedures are needed: assembling a device body, inserting an iron yoke, installing an upper clamping piece, assembling a lead, drying in a gas phase, vacuum-pumping and oiling a drop box, pressing and assembling the device body by a hanging cover, vacuum-pumping and oiling the drop box for the second time, assembling accessories, and standing, and the like, wherein the working procedures can be completed in at least 20 working days by taking 220kV as an example. The phenomenon that the higher proportion cannot meet the attention value of the transverse ratio in DL/T1093-2018 in the production of transformers is found and processed in advance, which plays an important role in preventing the loss of manpower and material resources and is also important in meeting the delivery period of customers.
Preferably, a plurality of iron yoke clamping fasteners are arranged on the lower iron yoke and the upper iron yoke, iron yoke clamping pieces are arranged at the positions, close to the end parts, of the lower iron yoke, the iron core column is fixed on the lower iron yoke and the upper iron yoke through the iron yoke clamping fasteners, iron yoke clamping pieces are arranged at the positions, close to the two sides, of the lower iron yoke, the iron yoke clamping fasteners can be used for improving the overall strength of the lower iron yoke and the upper iron yoke, and the iron yoke clamping pieces are used for fastening the lower iron yoke.
Preferably, an iron core backing plate is arranged below the lower iron yoke, a plurality of core column clamping pieces are arranged on the side edges of the lower iron yoke, and the core column clamping pieces are fixed on the iron core backing plate through bolts.
Preferably, an iron yoke backing plate is arranged below the upper iron yoke near the iron core limb.
Preferably, an iron yoke supporting piece is arranged at a position, close to the hydraulic lifting device, on the inner side of the upper iron yoke and used for improving the supporting effect of the upper iron yoke.
Preferably, a counterweight device is arranged at one end of the upper iron yoke far away from the iron core column, and the counterweight device is used for preventing the iron core column from being too heavy at one end, so that the device is inclined.
Preferably, the electric trolley is provided with a control cabinet, and the control cabinet is electrically connected between the hydraulic lifting device and the electric trolley to form a lifting movable upper iron yoke device.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the single-phase low-voltage short-circuit reactance detection is performed before the assembly of the body, so that the transverse ratio is performed, and whether the attention value requirement in DL/T1093-2018 can be met or not is judged, if not, the processing before the assembly of the body can be performed. At present, the detection of the low-voltage short-circuit reactance is carried out in a transformer factory test, and if the attention value in DL/T1093-2018 can not be met, the disassembly maintenance treatment of the transformer is needed. The phenomenon that the higher proportion cannot meet the attention value of the transverse ratio in DL/T1093-2018 in the production of transformers is found and processed in advance, and plays an important role in preventing the loss of manpower and material resources.
Drawings
FIG. 1 is a schematic diagram of a device for detecting winding deformation by reactance method before assembling a transformer body of the invention;
FIG. 2 is a schematic diagram of a single-phase assembled coil assembly of the present invention after being sleeved into a measuring device;
fig. 3 is a schematic top view of the present invention.
In the figure: 1. a core limb; 2. a lower yoke; 3. a stem clamping member; 4. an iron yoke clamping member; 5. an iron core backing plate; 6. a stem binding belt; 7. the iron yoke clamps the fastener; 8. an upper yoke; 9. an iron yoke backing plate; 10. an iron yoke support; 11. a transformer low-voltage reactance tester; 12. a hydraulic lifting device; 13. an electric trolley; 14. a counterweight device; 15. and a control cabinet.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1-3, the present invention provides a technical solution: a device for detecting winding deformation by reactance method before transformer body assembly is characterized in that: the hydraulic lifting device comprises iron core columns 1, lower iron yokes 2, upper iron yokes 8 and hydraulic lifting devices 12, wherein the iron core columns 1 are symmetrically arranged on two sides of the lower iron yokes 2, the lower iron yokes 2 and the iron core columns 1 form a U-shaped iron core, each side of the iron core columns 1 is provided with a core column binding belt 6 for fixing, a transformer low-voltage reactance tester 11 is arranged on one side of the iron core columns 1, the upper iron yokes 8 are arranged above the iron core columns 1, the output ends of the hydraulic lifting devices 12 are fixed below the upper iron yokes 8, and the tail ends of the hydraulic lifting devices 12 are fixed with electric trolleys 13; the invention can realize the detection of the single-phase low-voltage short-circuit reactance before the assembly of the body, so as to carry out the transverse ratio and judge whether the attention value requirement in DL/T1093-2018 can be met or not, if not, the invention can be processed before the assembly of the body. At present, the detection of the low-voltage short-circuit reactance is carried out in a transformer factory test, and if the attention value in DL/T1093-2018 can not be met, the disassembly maintenance treatment of the transformer is needed. The transformer body is assembled to a transformer test, and the following procedures are needed: the assembly of the device body, the installation of an upper clamping piece by inserting an iron yoke 8, the assembly of a lead, the gas phase drying, the vacuum oil injection of a falling box, the press mounting of the device body by a hanging cover, the vacuum oil injection of a secondary falling box, the assembly of accessories, the static release and the like, and the procedures can be completed only in 20 working days by taking 220kV as an example. The phenomenon that the higher proportion cannot meet the attention value of the transverse ratio in DL/T1093-2018 in the production of transformers is found and processed in advance, which plays an important role in preventing the loss of manpower and material resources and is also important in meeting the delivery period of customers.
Further, a plurality of iron yoke clamping fasteners 7 are arranged on the lower iron yoke 2 and the upper iron yoke 8, iron yoke clamping pieces 4 are arranged at positions, close to the end parts, of the lower iron yoke 2, the iron core column 1 is fixed on the lower iron yoke 2 and the upper iron yoke 8 through the iron yoke clamping fasteners 7, iron yoke clamping pieces 4 are arranged at positions, close to two sides, of the lower iron yoke 2, and the iron yoke clamping fasteners 7 can be used for improving the overall strength of the lower iron yoke 2 and the upper iron yoke 8, and the iron yoke clamping pieces 4 are used for fastening the lower iron yoke 2.
Further, an iron core backing plate 5 is arranged below the lower iron yoke 2, a plurality of core column clamping pieces 3 are arranged on the side edges of the lower iron yoke 2, and the core column clamping pieces 3 are fixed on the iron core backing plate 5 through bolts.
Further, an iron yoke backing plate 9 is provided below the upper iron yoke 8 near the iron leg 1.
Further, an iron yoke supporting member 10 is disposed at a position close to the hydraulic lifting device 12 inside the upper iron yoke 8, so as to improve the supporting effect of the upper iron yoke 8.
Further, the end of the upper yoke 8 far from the core limb 1 is provided with a weight device 14, and the weight device 14 is used for preventing the end of the core limb 1 from being too heavy, so that the device is inclined.
Further, a control cabinet 15 is arranged on the electric trolley 13, and the control cabinet 15 is electrically connected between the hydraulic lifting device 12 and the electric trolley 13 to form a lifting movable upper iron yoke device.
In summary, the invention is to sleeve the single-phase assembly coil set into the U-shaped iron core, and then move the upper iron yoke of the upper iron yoke device onto the iron core column to form a complete iron core loop. The low-voltage short-circuit reactance measurement can be carried out on the single-phase assembled coil groups, the measurement is carried out on the three single-phase assembled coil groups one by one, the transverse ratio is carried out, and if the transverse ratio is unqualified, the treatment can be carried out at the stage.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A device for detecting winding deformation by reactance method before transformer body assembly is characterized in that: including iron core post (1), lower yoke (2), go up yoke (8), hydraulic lifting device (12), lower yoke (2) bilateral symmetry is provided with iron core post (1), lower yoke (2) and iron core post (1) form a U type iron core, all be provided with on every side iron core post (1) and prop up tie (6) and fix, be provided with transformer low voltage reactance tester (11) on one of them side iron core post (1), iron core post (1) top is provided with yoke (8), the output of hydraulic lifting device (12) is fixed in upper yoke (8) below, hydraulic lifting device (12) end is fixed with electric trolley (13).
2. A device for detecting winding deformation by reactance method before assembling a transformer body according to claim 1, wherein: the iron core column comprises an iron core column body, wherein a plurality of iron yoke clamping fasteners (7) are arranged on the lower iron yoke (2) and the upper iron yoke (8), iron yoke clamping pieces (4) are arranged at positions, close to the end parts, of the lower iron yoke (2), the iron core column body (1) is fixed on the lower iron yoke (2) and the upper iron yoke (8) through the iron yoke clamping fasteners (7), and iron yoke clamping pieces (4) are arranged at positions, close to the two sides, of the lower iron yoke (2).
3. A device for detecting winding deformation by reactance method before assembling a transformer body according to claim 1, wherein: an iron core backing plate (5) is arranged below the lower iron yoke (2), a plurality of core column clamping pieces (3) are arranged on the side edges of the lower iron yoke (2), and the core column clamping pieces (3) are fixed on the iron core backing plate (5) through bolts.
4. A device for detecting winding deformation by reactance method before assembling a transformer body according to claim 1, wherein: an iron yoke backing plate (9) is arranged below the upper iron yoke (8) near the iron core column (1).
5. A device for detecting winding deformation by reactance method before assembling a transformer body according to claim 1, wherein: an iron yoke supporting piece (10) is arranged at the inner side of the upper iron yoke (8) and close to the hydraulic lifting device (12).
6. A device for detecting winding deformation by reactance method before assembling a transformer body according to claim 1, wherein: and one end of the upper iron yoke (8) far away from the iron core column (1) is provided with a counterweight device (14).
7. A device for detecting winding deformation by reactance method before assembling a transformer body according to claim 1, wherein: the electric trolley (13) is provided with a control cabinet (15), and the control cabinet (15) is electrically connected between the hydraulic lifting device (12) and the electric trolley (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410147176.3A CN117685869A (en) | 2024-02-02 | 2024-02-02 | Device for detecting winding deformation by reactance method before assembling transformer body |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410147176.3A CN117685869A (en) | 2024-02-02 | 2024-02-02 | Device for detecting winding deformation by reactance method before assembling transformer body |
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| CN117685869A true CN117685869A (en) | 2024-03-12 |
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| CN202410147176.3A Pending CN117685869A (en) | 2024-02-02 | 2024-02-02 | Device for detecting winding deformation by reactance method before assembling transformer body |
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2024
- 2024-02-02 CN CN202410147176.3A patent/CN117685869A/en active Pending
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