Novel supporting plate structure of extra-high voltage transformer

Abstract

The utility model discloses a novel extra-high voltage transformer supporting plate structure, which relates to the field of transformers, and comprises a folding screen part and a supporting plate part, and the folding screen part is arranged based on the supporting plate part; the supporting plate part comprises a supporting plate main body, the supporting plate main body comprises a first supporting plate and a second supporting plate, the first supporting plate is of a circular plate structure, and the second supporting plate is of a fan-shaped plate structure. According to the utility model, the problem that cracking is easy to cause due to the influence of the size of raw materials and the size of the supporting plate is solved; the oil immersion assembly is arranged on the surface of the first supporting plate, so that it is guaranteed that the supporting plate body can be fully immersed in oil; according to the utility model, based on the large weighing of the first supporting plate and the small weighing of the second supporting plate, the reasonable distribution structure and number of the insulating paperboards, the angle rings, the corrugated paperboards and the supporting strips are arranged, the phenomenon of cracking of the supporting plate main body is reduced, and the insulation margin meets the requirement through calculation.

Description

Technical Field

[0001] The utility model relates to the field of transformers, in particular to a novel ultra-high voltage transformer support plate structure. Background Art

[0002] UHV transmission technology and corresponding equipment manufacturing technology are cutting-edge technologies in the world's power technology and electrical equipment manufacturing fields. The development of UHV power grids can solve the problems of insufficient transmission capacity and tight land resources in China's existing 500 kV power grids. It is the best way to solve transmission efficiency, investment costs, environmental pressures, etc. It conforms to China's national conditions and is a major research project included in the national medium- and long-term science and technology development plan and the revitalization of the equipment manufacturing industry. UHV transformers have complex product structures and high technical difficulty. They require a large number of simulation calculations of electromagnetic fields and mechanical strength, and require high process levels. There are very few domestic manufacturers that can produce them.

[0003] The voltage level of the UHV transformer is high. The main insulation mainly adopts a thin cardboard small oil channel structure. The high-voltage coil is arranged on the outside. It is particularly important to control the insulation distance between the high-voltage coil and the oil tank, iron core and other structural parts. The insulation distance requirement is relatively large, and the number of layers of the cardboard tube is also relatively large. The outer limit size of the screen is also relatively large. The screen is placed on the pallet, and the size of the pallet is also relatively large. Due to the size of the raw materials and the size of the pallet, it is easy to cause cracking and affect the strength. The diameter of the pallet is generally controlled within 3120mm, while the outer diameter of the screen is much larger than this size. Therefore, it is necessary to propose a new UHV transformer pallet structure to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a novel UHV transformer support plate structure to solve the problem of cracking caused by the size of raw materials and the excessive size of the support plate.

[0005] To achieve the above object, the utility model provides the following technical solutions: a novel UHV transformer support plate structure, comprising a screen part and a support plate part, wherein the screen part is arranged based on the support plate part;

[0006] The support plate part includes a support plate body, and the support plate body includes a first support plate and a second support plate, wherein the first support plate is a circular plate structure, and the second support plate is a fan-shaped plate structure;

[0007] The enclosure part comprises insulating paperboard, corner rings, corrugated paperboard and stays.

[0008] Preferably, the first six layers of the insulating paperboard are butt-jointed, and the seventh layer is overlapped.

[0009] Preferably, the outer diameter of the first support plate is greater than the outer diameter of the coil, and bears the weight of all the coils, corrugated paperboard and support bars.

[0010] Preferably, four oil inlet holes are arranged on the first supporting plate, an opening is provided on the first supporting plate at the coil outlet position, and a slot is provided at the side pull belt position of the coil core.

[0011] Preferably, a row of rivet holes is provided on both sides of the notch.

[0012] Preferably, an oil immersion component is provided on the surface of the first support plate, and the oil immersion component includes an oil immersion groove and an oil immersion hole. The oil immersion groove is an annular structure, and a plurality of oil immersion grooves are provided, and the plurality of oil immersion grooves are nested inside and outside. The oil immersion hole is provided in the oil immersion groove, and a plurality of oil immersion holes are provided, and the plurality of oil immersion holes are arranged at equal distances.

[0013] Preferably, thick grooves are formed on the surface of the second support plate, and support bars are arranged between the plurality of insulating paper boards on the second support plate, so that the second support plate supports the weight of the insulating paper boards and the support bars.

[0014] Preferably, the first support plate and the second support plate are fixed as a whole using pins.

[0015] Preferably, two second support plates are provided, and the two second support plates are arranged at positions opposite to the outer circle of the first support plate.

[0016] Technical effects and advantages of the utility model:

[0017] 1. The utility model solves the problem of cracking caused by the size of the raw materials and the excessive size of the pallet;

[0018] 2. In the utility model, an oil immersion component is provided on the surface of the first support plate to ensure that the support plate body can be fully immersed in oil;

[0019] 3. In the utility model, based on the fact that the first pallet weighs more and the second pallet weighs less, a reasonable distribution structure and quantity of insulating paperboard, corner rings, corrugated paperboard and support bars are set, which reduces the phenomenon of cracking of the pallet body, and after calculation, the insulation margin meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the new ultra-high voltage transformer support plate of the utility model.

[0021] Figure 2 This is a schematic diagram of the main structure of the support plate of the utility model.

[0022] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure in the middle.

[0023] Figure 4 This is a schematic diagram of the point selection measurement from the inner circle A to the outer circle B of the coil of the utility model.

[0024] Figure 5 This is an insulation margin diagram for selecting points A to B in the utility model.

[0025] In the figure: 1. Insulating cardboard; 2. Corner ring; 3. Corrugated cardboard; 4. Stay; 5. Pallet body; 501. First pallet; 502. Second pallet; 6. Pin; 7. Oil inlet hole; 8. Oil immersion assembly; 801. Oil immersion tank; 802. Oil immersion hole; 9. Notch; 10. Riveting hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The utility model provides Figure 1-Figure 5 A new type of ultra-high voltage transformer support plate structure is shown.

[0028] The tray design is divided into two parts: 1. Screen part (attached Figure 1 );2. Pallet part (attached Figure 2 ).

[0029] The screen part is arranged on the supporting plate part.

[0030] 1. The enclosure part includes: insulating cardboard 1, the first six layers of the insulating cardboard 1 are butt-jointed, and the seventh layer is overlapped;

[0031] Angle ring 2, angle ring 2 is placed three layers at each exit position of the coil;

[0032] Corrugated paperboard 3, which is arranged between the first, second and third oil gaps of the coil from the inside to the outside;

[0033] The stay 4 is arranged in the remaining oil gap of the coil.

[0034] After calculation by calculation software, the insulation margin meets the requirements, see attached Figure 4-5 .

[0035] in, Figure 4 The middle is the selected measurement point from the inner circle A to the outer circle B of the coil; Figure 5 The figure in the figure is the insulation margin table from point A to point B. The curve above the table is the Weidmann allowable value, and the straight line below is the actual value.

[0036] 2. The support plate part includes a support plate body 5 , and the support plate body 5 includes a first support plate 501 and a second support plate 502 .

[0037] The first support plate 501 is a circular plate structure. The outer diameter of the first support plate 501 is larger than the outer diameter of the coil. It bears the weight of all coils, corrugated cardboard 3 and support strips 4. The weighing is relatively high, and high mechanical strength is required. The thickness needs to be calculated for strength. Four oil inlet holes 7 are evenly arranged on the first support plate 501. The first support plate 501 is opened at the coil outlet position, and a notch 9 is opened at the side pull belt position of the coil core. A row of rivet holes 10 are opened on both sides of the notch 9 to prevent the support plate body 5 from cracking, solving the problem of The problem of cracking is easily caused by the size of the raw materials and the excessive size of the pallet; an oil immersion component 8 is provided on the surface of the first pallet 501 to ensure that the pallet body 5 can be fully immersed in oil, and the oil immersion component 8 includes an oil immersion groove 801 and an oil immersion hole 802. The oil immersion groove 801 is annular in structure, and a plurality of oil immersion grooves 801 are provided, and the plurality of oil immersion grooves 801 are nested inside and outside, and the oil immersion hole 802 is provided in the oil immersion groove 801, and a plurality of oil immersion holes 802 are provided, and the plurality of oil immersion holes 802 are arranged at equal distances.

[0038] The second support plate 502 is a fan-shaped plate structure, and the insulating paperboard 1 is installed on the second support plate 502; a 20 mm thick groove is opened on the surface of the second support plate 502, and a support bar 4 is also arranged between the multiple insulating paperboards 1 on the second support plate 502. The second support plate 502 supports the weight of the insulating paperboard 1 and the support bar 4, has a relatively small load-bearing capacity, and is designed to be 20 mm thick; there are two second support plates 502, and the two second support plates 502 are arranged at opposite positions of the outer circle of the first support plate 501.

[0039] The first support plate 501 and the second support plate 502 are fixed as a whole using pins 6. In the utility model, based on the fact that the first support plate 501 weighs more and the second support plate 502 weighs less, a reasonable distribution structure and quantity of the insulating paperboard 1, the corner ring 2, the corrugated paperboard 3, and the support bar 4 are set, thereby reducing the cracking phenomenon of the support plate body 5. After calculation, the insulation margin meets the requirements.

Claims

1. A novel UHV transformer support plate structure, comprising a screen part and a support plate part, characterized in that: The enclosure part is arranged based on the support plate part; The support plate part comprises a support plate body (5), the support plate body (5) comprises a first support plate (501) and a second support plate (502), the first support plate (501) is a circular plate structure, and the second support plate (502) is a fan-shaped plate structure; The enclosure part comprises insulating paperboard (1), corner rings (2), corrugated paperboard (3) and supporting bars (4).

2. The novel UHV transformer support plate structure according to claim 1 is characterized in that: The first six layers of the insulating paperboard (1) are butt-jointed, and the seventh layer is overlapped.

3. The novel UHV transformer support plate structure according to claim 1 is characterized in that: The outer diameter of the first support plate (501) is greater than the outer diameter of the coil and bears the weight of all the coils, the corrugated paperboard (3) and the support bar (4).

4. The novel UHV transformer support plate structure according to claim 1 is characterized in that: The first support plate (501) is provided with four oil inlet holes (7), the first support plate (501) is opened at the coil outlet position, and a notch (9) is opened at the side pull belt position of the coil core.

5. The novel UHV transformer support plate structure according to claim 4 is characterized in that: A row of riveting holes (10) is provided on both sides of the notch (9).

6. The novel UHV transformer support plate structure according to claim 1 is characterized in that: An oil immersion component (8) is arranged on the surface of the first support plate (501), and the oil immersion component (8) comprises an oil immersion groove (801) and an oil immersion hole (802). The oil immersion groove (801) is an annular structure. A plurality of oil immersion grooves (801) are arranged, and the plurality of oil immersion grooves (801) are arranged nested inside and outside. The oil immersion hole (802) is arranged in the oil immersion groove (801). A plurality of oil immersion holes (802) are arranged, and the plurality of oil immersion holes (802) are arranged at equal distances.

7. The novel UHV transformer support plate structure according to claim 1 is characterized in that: Thick grooves are formed on the surface of the second support plate (502), and support bars (4) are arranged between the plurality of insulating paperboards (1) on the second support plate (502). The second support plate (502) supports the weight of the insulating paperboards (1) and the support bars (4).

8. The novel UHV transformer support plate structure according to claim 1 is characterized in that: The first support plate (501) and the second support plate (502) are fixed as a whole using pins (6).

9. The novel UHV transformer support plate structure according to claim 1 is characterized in that: Two second support plates (502) are provided, and the two second support plates (502) are arranged at opposite positions of the outer circle of the first support plate (501).

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