Structure for inhibiting overheating of iron core piece of on-site assembled transformer

Abstract

The utility model discloses a structure for inhibiting overheating of an iron core piece of an on-site assembled transformer, which relates to the field of transformers and comprises a fixed supporting pull plate structure, an adjustable insulating pull plate structure and an upper clamping piece, the fixed supporting pull plate structure plays a role of integrally supporting a framework, an adjustable pull plate is arranged on one side of the upper clamping piece, and the adjustable insulating pull plate structure is arranged on the other side of the upper clamping piece. A hanger shaft is welded on the upper clamping piece; and an adjustable hanger shaft insulating piece is arranged on the hanger shaft. According to the utility model, the assembly requirement of field assembly of the transformer is met, the supporting strength of the iron core is ensured, the circulation in the iron core structural member is reduced, the heat dissipation of the iron core structural member is enhanced, the overheating risk is reduced, and the stray loss of the transformer is reduced, so that the total loss of the transformer is reduced, and the economic performance is better.

Description

Technical Field

[0001] The utility model relates to the field of transformers, in particular to a structure for suppressing overheating of iron core parts of a transformer assembled on site. Background Art

[0002] In order to achieve the goal of "carbon peak and carbon neutrality" and adapt to the requirements of green and low-carbon life, the requirements for transformer losses are getting higher and higher. During operation, the transformer will generate stray losses, and overheating of the core will increase the stray losses of the transformer, consume more energy, and increase direct or indirect carbon dioxide emissions, which is not conducive to the realization of the carbon peak target. For transformers installed in areas with restricted transportation, the disassembly and on-site assembly method is generally adopted. The transformer core needs to be disassembled for transportation and assembled on-site. Due to frequent disassembly and assembly, under the influence of assembly tolerances and on-site conditions, the core structural parts are prone to virtual connection. Under the action of the magnetic field, large-scale circulating currents appear on the structural parts, resulting in overheating of the core structural parts and gas production in the transformer.

[0003] Therefore, it is necessary to propose a structure for suppressing overheating of core parts of a transformer assembled on site to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a structure for suppressing overheating of core parts of transformers assembled on site, which can not only meet the supporting strength of the transformer skeleton-core, but also reduce the circulating current in the structural parts, strengthen the heat dissipation of the structural parts, and solve the risk of overheating of core parts of transformers assembled on site at present.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a structure for suppressing overheating of core components of an on-site assembled transformer, comprising a fixed support pull plate structure, an adjustable insulating pull plate structure, and an upper clamp, wherein the fixed support pull plate structure serves as an overall supporting skeleton, an adjustable pull plate is provided on one side of the upper clamp, a suspension shaft is welded on the upper clamp, an adjustable suspension shaft insulating member is provided on the suspension shaft, the adjustable pull plate is insulated and separated from the upper clamp by a second insulating pad and an adjustable suspension shaft insulating member, the second insulating pad is provided between the upper clamp and the adjustable pull plate, the adjustable insulating pull plate structure adjusts the relative position of the overall core structural member through the adjustable suspension shaft insulating member, a first insulating pad is provided on a side of the upper clamp away from the adjustable pull plate, the first insulating pad is assembled on the upper clamp through a clamp insulating set accessory, a fixed pressure plate is provided on a side of the first insulating pad away from the upper clamp, and the fixed pressure plate is assembled on the adjustable pull plate through an equipotential fastener assembly.

[0006] Preferably, a core lamination is arranged on the side of the adjustable pull plate away from the upper clamp, and the pull plate insulation between the adjustable pull plate and the core lamination consists of a first oil channel, a Sichuan-shaped copper plate, and a second oil channel, and the Sichuan-shaped copper plate is arranged between the first oil channel and the second oil channel.

[0007] Preferably, the adjustable pull plate and the core laminations themselves will generate eddy currents to generate heat, and the first oil channel and the second oil channel dissipate heat through the oil flow of the transformer itself.

[0008] Preferably, the Sichuan-shaped copper plate includes a detachable copper plate and a Sichuan-shaped fixed copper plate, and the detachable copper plate and the Sichuan-shaped fixed copper plate are detachably connected.

[0009] Preferably, the Sichuan-shaped fixed copper plate has a guide groove in the vertical direction, and a paper strap is used to bind the first oil channel support bar and the second oil channel support bar to the Sichuan-shaped copper plate through the guide groove to firmly support the Sichuan-shaped copper plate and the oil channel.

[0010] Preferably, the Sichuan-shaped copper plate is arranged in a Sichuan shape.

[0011] Preferably, an upper support plate is provided at the upper end of the upper clamp, one end of the upper support plate is connected to the upper clamp via an upper support plate insulating assembly, and the other end is equi-connected to the upper clamp.

[0012] Preferably, a drawstring is provided at the lower end of the upper clamp, one end of the drawstring is connected to the upper clamp via a drawstring insulating set accessory, and the other end is connected to the upper clamp in an equal position.

[0013] The utility model also discloses a method for suppressing overheating of core components of a transformer assembled on site, which is implemented by using any of the above structures for suppressing overheating of core components of a transformer assembled on site. The specific method includes the following steps:

[0014] S1: Structural design: An adjustable pull plate is provided on one side of the upper clamp, a suspension shaft is welded on the upper clamp, an adjustable suspension shaft insulator is provided on the suspension shaft, the adjustable insulating pull plate structure adjusts the relative position of the integral core structure through the adjustable suspension shaft insulator, the adjustable suspension shaft insulator is used to adjust the distance between the suspension shaft and the upper clamp, the first insulating pad is assembled with the upper clamp through the clamp insulation set accessories, and then the first insulating pad is firmly assembled with the upper clamp through the fixed pressure plate and the equipotential fastener assembly accessories, while ensuring that the adjustable suspension shaft insulator does not leak out of the upper clamp, a pull plate insulator with a heat dissipation function is provided between the adjustable pull plate and the core laminations, the pull plate at the adjustable suspension shaft insulator is changed to an insulating structure, the pull belt and the upper support plate are changed to a single-side insulating structure to prevent circulating overheating, the Sichuan-shaped copper plate is composed of a detachable copper plate and a Sichuan-shaped fixed copper plate, and the detachable copper plate and the Sichuan-shaped fixed copper plate are detachably connected;

[0015] S2: On-site assembly. First, the Sichuan-shaped fixed copper plate is transported together with the core laminations as a whole, and the detachable copper plate is transported separately. During on-site assembly, the whole set of coil packaging is completed, and the detachable copper plate is installed after the iron yoke is inserted. The Sichuan-shaped fixed copper plate has a guide groove in the vertical direction. The first oil channel support bar and the second oil channel support bar are tied to the Sichuan-shaped copper plate through the guide groove with a paper strap to firmly support the Sichuan-shaped copper plate and the oil channel. The Sichuan-shaped copper plate in the middle of the pull plate insulation is set as a detachable structure, which cooperates with the oil channels on both sides of the Sichuan-shaped copper plate to enhance heat dissipation.

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

[0017] It meets the assembly requirements of on-site assembled transformers, ensures the supporting strength of the core, reduces the circulating current in the core structure, strengthens the heat dissipation at the core structure, reduces the risk of overheating, reduces the stray loss of the transformer, thereby reducing the total loss of the transformer and achieving better economic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the structure of suppressing overheating of the core parts of the transformer assembled on site.

[0019] Figure 2 It is a structural schematic diagram of the upper clamp and the adjustable pull plate of the utility model when they are connected.

[0020] Figure 3 It is a schematic diagram of the structure when the upper clamp and the fixed support pull plate are connected in the prior art.

[0021] Figure 4 It is a schematic diagram of the structure of the river-shaped copper plate of the utility model.

[0022] Figure 5 This is a schematic diagram of the structure of the river-shaped fixed copper plate of the utility model.

[0023] In the figure: a fixed support plate structure 1, an adjustable insulating plate structure 2, an upper clamp 3, a first insulating pad 4, a clamp insulation set accessory 5, a fixed pressure plate 6, an equipotential fastener assembly 7, an adjustable suspension shaft insulation 8, an adjustable pull plate 9, a first oil channel 10, a Sichuan-shaped copper plate 11, a second oil channel 12, an iron core lamination 13, a pull-belt insulation set accessory 14, a pull strap 15, an upper support plate 16, an upper support plate insulation assembly 17, a second insulating pad 18, a fixed support plate 19, an upper clamp equipotential fastener assembly 20, a detachable copper plate 21, a Sichuan-shaped fixed copper plate 22, a paper binding tape 23, a first oil channel support bar 24, and a second oil channel support bar 25. DETAILED DESCRIPTION

[0024] 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.

[0025] The utility model provides Figure 1-Figure 5 The structure of a transformer assembled on site to suppress overheating of the core is shown, and the overall frame of the core structure is composed of Figure 1 The fixed support plate structure 1, the adjustable insulating plate structure 2, and the upper clamp 3 are composed. The fixed support plate structure 1 plays the role of the overall support skeleton. An adjustable plate 9 is set on one side of the upper clamp 3. The suspension shaft is welded on the upper clamp 3, and the fixed support plate 19 is inserted. The structure is simple and firmly fixed. At the same time, the fixed support plate 19 is not integrated with the suspension shaft, which does not affect the packaging of the whole set of coils during on-site assembly. The suspension shaft is provided with an adjustable suspension shaft insulation part 8. The adjustable insulating plate structure 2 adjusts the relative position of the overall core structure through the adjustable suspension shaft insulation part 8, so that the fasteners in various parts of the core can be fastened in place without virtual connection.

[0026] The overall framework of the core structure is arranged by an adjustable suspension shaft insulating member 8, so that the position of the core structure can be fine-tuned during on-site assembly to prevent fasteners such as bolts from deforming due to shear force and causing virtual connections, thereby causing local overheating problems.

[0027] One end of the upper support plate 16 is connected to the upper clamp 3 through the upper support plate insulation assembly 17, and the other end is connected to the upper clamp 3 in an equal position. One end of the pull strap 15 is connected to the upper clamp 3 through the pull strap insulation set 14, and the other end is connected to the upper clamp 3 in an equal position to ensure insulation on one side to prevent the formation of a circulating current. The fixed support pull plate 19 is connected to the upper clamp 3 through the upper clamp equipotential fastener assembly 20, and the adjustable pull plate 9 is insulated from the upper clamp 3 to prevent the adjustable pull plate 9 and the upper clamp 3 from generating a large loop.

[0028] The adjustable pull plate 9 and the suspension shaft are an integral whole to ensure the strength of the adjustable pull plate 9 and the suspension shaft. The adjustable pull plate 9 is insulated and separated from the upper clamp 3 by the second insulating pad 18 and the adjustable suspension shaft insulating member 8. The second insulating pad 18 is arranged between the upper clamp 3 and the adjustable pull plate 9. At the same time, the adjustable suspension shaft insulating member 8 can adjust the distance between the suspension shaft and the upper clamp 3.

[0029] A first insulating pad 4 is provided on the side of the upper clamp 3 away from the adjustable pull plate 9. The first insulating pad 4 is assembled with the upper clamp 3 through the clamp insulation set accessories 5. A fixed pressure plate 6 is provided on the side of the first insulating pad 4 away from the upper clamp 3. The first insulating pad 4 and the upper clamp 3 are firmly assembled by the fixed pressure plate 6 and the equipotential fastener assembly parts 7, while ensuring that the adjustable suspension shaft insulation 8 does not leak out of the upper clamp 3.

[0030] The pull plate insulation between the adjustable pull plate 9, the fixed support pull plate 19 and the core laminations 13 is composed of a first oil channel 10, a Sichuan-shaped copper plate 11, and a second oil channel 12. The Sichuan-shaped copper plate 11 is arranged between the first oil channel 10 and the second oil channel 12. The adjustable pull plate 9 and the core laminations 13 themselves will have eddy currents to generate heat. The first oil channel 10 and the second oil channel 12 can dissipate heat through the oil flow of the transformer itself. At the same time, the Sichuan-shaped copper plate 11 has fast thermal conductivity and can dissipate heat faster. The first oil channel 10 and the second oil channel 12 can also play an insulating role between the adjustable pull plate 9 and the Sichuan-shaped copper plate 11, and between the Sichuan-shaped copper plate 11 and the core laminations 13.

[0031] A pull plate insulator with heat dissipation function is provided between the adjustable pull plate 9 and the core lamination 13 to reduce the heating problem caused by eddy current loss of the adjustable pull plate 9. The pull plate at the adjustable suspension shaft insulator 8 is changed to an insulating structure, and the pull belt 15 and the upper support plate 16 are changed to a single-side insulating structure to prevent circulating overheating.

[0032] The Sichuan-shaped copper plate 11 is composed of a detachable copper plate 21 and a Sichuan-shaped fixed copper plate 22, and the detachable copper plate 21 and the Sichuan-shaped fixed copper plate 22 are detachably connected. The Sichuan-shaped fixed copper plate 22 is transported as a whole together with the core laminations, and the detachable copper plate 21 is transported separately. During on-site assembly, the entire set of coil packages is completed, and the detachable copper plate 21 is installed after the upper iron yoke is inserted. The Sichuan-shaped fixed copper plate 22 has a guide groove in the vertical direction, and the first oil channel support bar 24 and the second oil channel support bar 25 are tied to the Sichuan-shaped copper plate 11 through the guide groove using a paper strap 23 to firmly support the Sichuan-shaped copper plate 11 and the oil channel, while ensuring the size of the oil channel.

[0033] In order to meet the requirements of on-site assembly, the Sichuan-shaped copper plate 11 in the middle of the pull-plate insulation is set to a detachable structure, and the Sichuan-shaped copper plate 11 at the support is set to a Sichuan shape, which cooperates with the oil channels on both sides of the Sichuan-shaped copper plate 11 to enhance heat dissipation.

Claims

1. A structure for suppressing overheating of an iron core member of an on-site assembled transformer, comprising a fixed support plate structure (1), an adjustable insulating plate structure (2), and an upper clamp (3), characterized in that: An adjustable pull plate (9) is provided on one side of the upper clamp (3), a suspension shaft is welded on the upper clamp (3), an adjustable suspension shaft insulating member (8) is provided on the suspension shaft, the adjustable pull plate (9) is insulated and separated from the upper clamp (3) by a second insulating pad (18) and the adjustable suspension shaft insulating member (8), the second insulating pad (18) is provided between the upper clamp (3) and the adjustable pull plate (9), a first insulating pad (4) is provided on a side of the upper clamp (3) away from the adjustable pull plate (9), and a fixed pressing plate (6) is provided on a side of the first insulating pad (4) away from the upper clamp (3).

2. The structure for suppressing overheating of core components of a transformer assembled on site according to claim 1, characterized in that: An iron core lamination (13) is arranged on the side of the adjustable pull plate (9) away from the upper clamp (3); the pull plate insulating member between the adjustable pull plate (9) and the iron core lamination (13) is composed of a first oil passage (10), a river-shaped copper plate (11), and a second oil passage (12); the river-shaped copper plate (11) is arranged between the first oil passage (10) and the second oil passage (12).

3. The structure for suppressing overheating of core components of a transformer assembled on site according to claim 2, characterized in that: The adjustable pull plate (9) and the core laminations (13) themselves generate heat through eddy currents, and the first oil channel (10) and the second oil channel (12) dissipate heat through the oil flow of the transformer itself.

4. The structure for suppressing overheating of core components of a transformer assembled on site according to claim 2, characterized in that: The Sichuan-shaped copper plate (11) comprises a detachable copper plate (21) and a Sichuan-shaped fixed copper plate (22), and the detachable copper plate (21) and the Sichuan-shaped fixed copper plate (22) are detachably connected.

5. The structure for suppressing overheating of core components of a transformer assembled on site according to claim 4, characterized in that: The river-shaped fixed copper plate (22) is provided with a guide groove in the vertical direction. A paper binding tape (23) is used on the river-shaped fixed copper plate (22) to bind the first oil channel support bar (24) and the second oil channel support bar (25) to the river-shaped copper plate (11) through the guide groove, so as to firmly support the river-shaped copper plate (11) and the oil channel.

6. The structure for suppressing overheating of core components of a transformer assembled on site according to claim 2, characterized in that: The river-shaped copper plate (11) is arranged in a river shape.

7. The structure for suppressing overheating of core components of a transformer assembled on site according to claim 1, characterized in that: An upper support plate (16) is provided at the upper end of the upper clamp (3); one end of the upper support plate (16) is connected to the upper clamp (3) via an upper support plate insulating assembly (17), and the other end is equi-connected to the upper clamp (3).

8. The structure for suppressing overheating of core components of a transformer assembled on site according to claim 1, characterized in that: A drawstring (15) is provided at the lower end of the upper clamp (3); one end of the drawstring (15) is connected to the upper clamp (3) via a drawstring insulating set accessory (14), and the other end is equi-connected to the upper clamp (3).

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