Transformer with high sudden short circuit resistance
By using clamping structures and interphase support plates and other components in the transformer to fasten the coils, the problem of easy deformation of the coils of three-phase oil-immersed distribution transformers during sudden short circuits is solved, achieving a significant improvement in the ability to resist sudden short circuits and a reduction in costs.
Patent Information
- Application Number
- CN202422901873.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-27
AI Technical Summary
The coils of existing three-phase oil-immersed distribution transformers are easily deformed when a sudden short circuit occurs, resulting in poor resistance to sudden short circuits. Existing improvement measures are costly or ineffective.
The coil is fastened in the interphase direction by using components such as clamping structure, interphase support plates and core wire support bars. The gap between the coil and the iron core is filled by a combination of vertical clamps, horizontal clamps and outer partitions to enhance the constraint of the coil.
It effectively restrains coil deformation and significantly improves the transformer's ability to resist sudden short circuits. It is low-cost and reliable in quality.
Smart Images
Figure CN223450674U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the transformer technical field's high anti -sudden short circuit ability's transformer. BACKGROUND
[0002] The power transformer is the very key equipment in the power system, and the sudden short circuit is the system failure that the power transformer can face in the operation process. The anti-sudden short circuit ability is the important performance of the power transformer, and is also the important guarantee of the power grid operation reliability. At present, most of the domestic three -phase oil -immersed distribution transformers adopt the long circular structure, and the structure has the characteristics such as small volume and light weight, but due to the jumping of coil in the interphase direction when sudden short circuit, the winding deformation is caused, and thus the anti-sudden short circuit ability is poor. In order to improve the anti-sudden short circuit ability of the product, the enterprises in the industry generally adopt the measures such as the whole immersion of the coil in high-strength insulation or the whole packaging of the three -phase coil by the fastening insulation belt. But there are problems such as the weakening of the coil insulation, the high manufacturing cost and the unsatisfactory improvement effect of the anti-sudden short circuit ability. SUMMARY
[0003] The utility model discloses a kind of high anti-sudden short circuit ability's transformers, so that the anti-sudden short circuit ability of transformer is greatly promoted.
[0004] To achieve the above object, the utility model provides a kind of high anti-sudden short circuit ability's transformers, including clamping structure, clamping structure is arranged at the coil outside of transformer, clamping structure is provided with outer side baffle between coil, the coil of transformer is provided with interphase support plate between coil, the coil of transformer is provided with core wire bracing between iron core.
[0005] Compared with prior art, the utility model has the beneficial effect that by the tightness and fastening of each component in the interphase direction, the deformation of coil when sudden short circuit is effectively constrained, so that the anti-sudden short circuit ability of transformer is greatly improved. Compared with the original whole coil dipping scheme, it has the advantages of low cost and more reliable quality. Compared with the whole packaging scheme of three -phase coil, the anti-sudden short circuit ability is obviously improved and strengthened.
[0006] As a further improvement of the utility model, the clamping structure includes a pair of vertical clamps, the vertical clamps are arranged on the two side surfaces of the transformer and are respectively located on the outer side surfaces of the A-phase coil and the C-phase coil of the transformer, the upper and lower parts of the front surface of the transformer are respectively provided with upper and lower horizontal clamps, the upper and lower parts of the back surface of the transformer are also respectively provided with upper and lower horizontal clamps, the upper ends of the vertical clamps are respectively fixedly connected with the upper ends of the upper horizontal clamps, and the lower ends of the vertical clamps are respectively fixedly connected with the lower ends of the lower horizontal clamps.
[0007] The vertical clamping plate is fixed by the upper horizontal clamping piece and the lower horizontal clamping piece, and the outer side partition plate is pressed against the outer side of the coil, so that the three-phase coil is effectively fastened and constrained in the inter-phase direction.
[0008] As a further improvement of the utility model, the inter-phase supporting plate comprises an inter-phase insulating paperboard, and the front and back surfaces of the inter-phase insulating paperboard are provided with transverse insulating pads, and the transverse insulating pads are provided with transverse oil channels.
[0009] The inter-phase supporting plate is composed of the insulating pads with the transverse oil channels and the insulating paperboard, and is used for filling the gaps between the coils.
[0010] As a further improvement of the utility model, the core wire supporting strip is a narrow strip structure with a sharpened lower end, and is installed and inserted into the inter-phase straight part between the iron core and the coil.
[0011] The core wire supporting strip is a narrow strip structure with a sharpened lower end, and is installed and inserted into the inter-phase straight part between the iron core and the coil, and is used for filling the gaps in the inter-phase straight part between the iron core and the coil.
[0012] As a further improvement of the utility model, the outer side partition plate is provided with a pair of and is respectively arranged between the vertical clamping plate and the A-phase coil and between the vertical clamping plate and the C-phase coil, and the outer side partition plate comprises a side pressing insulating paperboard, and one side of the side pressing insulating paperboard opposite to the coil is provided with a longitudinal insulating pad, and the longitudinal insulating pad is provided with a longitudinal oil channel.
[0013] The outer side partition plate is composed of the insulating pads with the longitudinal oil channels and the insulating paperboard, and is used for filling the gaps between the coil and the clamping plate. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a front view of the utility model.
[0015] Figure 2 It is a side view of the utility model.
[0016] Figure 3 It is a structure schematic view of the outer side partition plate of the utility model.
[0017] Figure 4 It is a structure schematic view of the inter-phase supporting plate of the utility model.
[0018] Figure 5 It is a structure schematic view of the core wire supporting strip of the utility model.
[0019] In the utility model, 1 is an iron core, 2 is an upper horizontal clamping piece, 3 is a vertical clamping plate, 4 is an outer side partition plate, 5 is a core wire supporting strip, 6 is a coil, 7 is an inter-phase supporting plate, 8 is a lower horizontal clamping piece, 9 is a side pressing insulating paperboard, 10 is a longitudinal insulating pad, 11 is an inter-phase insulating paperboard, and 12 is a transverse insulating pad. DETAILED DESCRIPTION
[0020] The utility model is further explained in connection with the drawings as follows:
[0021] As Figures 1-5 The utility model discloses a transformer of high anti -short -circuit ability, including clamping structure, clamping structure sets up outside the coil 6 of transformer, and sets up outside partition 4 between clamping structure and coil 6, and sets up phase spacing support plate between the coil 6 of transformer and coil 6, and sets up core wire bracing 5 between the coil 6 of transformer and iron core 1.
[0022] Clamping structure includes a pair of vertical clamping plate 3, and vertical clamping plate 3 sets up in the two side surfaces of transformer and is respectively in the outside surface of A phase coil 6 and C phase coil 6 of transformer, and the upper portion and lower portion of the front surface of transformer are provided with upper horizontal clamping piece 2 and lower horizontal clamping piece 8 respectively, and the upper portion and lower portion of the back surface of transformer are also provided with upper horizontal clamping piece 2 and lower horizontal clamping piece 8 respectively, and the upper two ends of vertical clamping plate 3 are fixedly connected with the two ends of upper horizontal clamping piece 2 respectively, and the lower two ends of vertical clamping plate 3 are fixedly connected with the two ends of lower horizontal clamping piece 8 respectively.
[0023] Phase spacing support plate 7 includes phase spacing insulating paper board 11, and the front surface and back surface of phase spacing insulating paper board 11 are provided with transverse insulating pad 12, and transverse insulating pad is provided with transverse oil channel in. Core wire bracing 5 is the narrow board structure of lower end sharpening, and is installed and is inserted in the phase spacing straight line portion between iron core 1 and coil 6. Outside partition 4 is provided with a pair and is respectively set up between vertical clamping plate 3 and A phase coil 6 and between vertical clamping plate 3 and C phase coil 6, and outside partition 4 includes side pressure insulating paper board 9, and the side of side pressure insulating paper board 9 opposite coil 6 is provided with longitudinal insulating pad 10, and longitudinal insulating pad is provided with longitudinal oil channel in.
[0024] In the utility model, vertical clamping plate 3 and outside partition 4 are installed in the outside of A, C phase coil 6, and the upper two ends of vertical clamping plate 3 and the two ends of upper horizontal clamping piece 2 are fixedly connected by fastening screw, and the lower two ends of vertical clamping plate 3 and the two ends of lower horizontal clamping piece 8 are fixedly connected.
[0025] In the phase spacing direction between iron core 1 and coil 6, iron core 1 bracing is inserted and installed.
[0026] A plurality of pressing screws are arranged at the position of the middle part of vertical clamping plate 3 opposite coil 6, and outside partition 4 is pressed on the outside surface of coil 6 by tightening screw to enhance the pressing effect of vertical clamping plate 3 on coil 6.
[0027] Outside partition 4 is composed of longitudinal insulating pad 10 with longitudinal oil channel and side pressure insulating paper board 9 to form mechanical support and ensure the heat dissipation performance and ground insulation performance of coil 6.
[0028] The inter-phase support plate 7 is composed of a transverse insulation pad 12 with a transverse oil channel and an inter-phase insulation paper board 11, so as to facilitate the installation of the inter-phase support plate 77 and ensure the heat dissipation performance and mutual insulation performance of the coil 6.
[0029] The core wire support strip 5 adopts a narrow plate strip structure with a flattened lower end, so as to facilitate the insertion during the assembly process and ensure the effective filling of the gap between the core 1 and the coil 6 in the inter-phase straight position.
[0030] The utility model discloses through the plug -tight and fastening of each part in the inter-phase direction, the deformation of coil 6 when the sudden short circuit has been effectively restricted, thereby the anti -sudden short circuit ability of transformer has been improved greatly, with low cost, quality more reliable advantage, and the anti -sudden short circuit ability has been more obvious improvement and strengthening.
[0031] The utility model discloses not limited to the above embodiment, on the basis of the technical scheme of the disclosure, the skilled in the art can make some replacement and deformation to some technical features without creative labor according to the disclosed technical content, and these replacement and deformation are all within the protection scope of the utility model.
Claims
1. A transformer with high resistance to sudden short circuit, characterized by: It includes a clamping structure, which is arranged outside the coil of the transformer, an outer partition is arranged between the clamping structure and the coil, an interphase support plate is arranged between the coils of the transformer, and a core wire support bar is arranged between the coil of the transformer and the iron core.
2. The transformer with high sudden short-circuit resistance according to claim 1, characterized in that: The clamping structure includes a pair of vertical clamps, which are arranged on both sides of the transformer and are respectively located on the outer sides of the A-phase coil and the C-phase coil of the transformer. The upper and lower parts of the front of the transformer are respectively provided with upper horizontal clamps and lower horizontal clamps. The upper and lower parts of the back of the transformer are also respectively provided with upper horizontal clamps and lower horizontal clamps. The upper two ends of the vertical clamps are respectively fixedly connected to the two ends of the upper horizontal clamp, and the lower two ends of the vertical clamps are respectively fixedly connected to the two ends of the lower horizontal clamp.
3. The transformer with high sudden short-circuit resistance according to claim 2, characterized in that: The interphase supporting plate comprises an interphase insulating paperboard, the front and back sides of the interphase insulating paperboard are both provided with transverse insulating pads, and transverse oil channels are provided in the interphase bonding pads.
4. The transformer with high resistance to sudden short circuit according to claim 3, characterized in that: The core wire stay is a narrow strip structure with a tapered lower end, which is installed and inserted into the interphase straight part between the iron core and the coil.
5. The transformer with high sudden short-circuit resistance according to claim 4, characterized in that: A pair of outer partitions are provided and are respectively arranged between the vertical plywood and the A-phase coil and between the vertical plywood and the C-phase coil. The outer partition includes a side-pressure insulating cardboard. A longitudinal insulating pad is provided on the side of the side-pressure insulating cardboard facing the coil, and a longitudinal oil channel is provided in the longitudinal edge pad.