Insulation tapping three-phase dry-type transformer

Abstract

The utility model provides an insulation tapping three-phase dry-type transformer which comprises a transformer shell provided with windings, the windings comprise a low-voltage winding and a high-voltage winding, and voltage conversion can be efficiently achieved. The winding guide rod is provided with a winding insulation assembly composed of a winding insulation layer and interlayer insulation, and current leakage and short circuit are effectively prevented. The winding guide rod achieves efficient electrical isolation through the winding insulating layer and interlayer insulation, and safe operation of equipment in a high-voltage environment is ensured. The auxiliary heat dissipation fins are arranged on the outer surface of the transformer shell, the heat dissipation efficiency is effectively improved, and meanwhile the anti-rust paint layer is coated to enhance the corrosion resistance. The bottom supporting system is composed of an underframe, mounting channel steel and an insulating sleeper, and is matched with an isolation plate and a mounting conical seat to ensure stable operation of equipment and provide good electrical isolation. The overall design gives consideration to efficient voltage conversion, reliable insulation protection, stable mechanical support and convenient maintenance operation.

Description

Technical Field

[0001] This utility model relates to the field of transformers, and more specifically, to an insulated tap three-phase dry-type transformer. Background Technology

[0002] In power systems, three-phase dry-type transformers are key equipment for voltage conversion and power distribution, widely used in various sectors of industrial, commercial, and residential electricity consumption. With the growth of electricity demand and the diversification of electrical equipment, higher requirements are placed on the performance and reliability of transformers. However, existing insulated tap-connected three-phase dry-type transformer technology has some shortcomings:

[0003] I. Insulation Performance Issues: Weak Winding Insulation: Traditional transformers suffer from inadequate winding insulation design, with insufficient insulation measures between winding conductors and windings, and between winding layers, easily leading to leakage and interlayer short circuits. This not only affects the normal operation of the transformer but may also cause safety accidents, threatening the safety of equipment and personnel. Rapid Aging of Insulation Materials: The insulation materials used in some existing transformers age rapidly under long-term high-temperature and high-pressure conditions, gradually degrading their insulation performance. This increases the risk of transformer failure, necessitates frequent replacement of insulation components, and increases maintenance costs and power outage time.

[0004] Second, the design of traditional tap changers results in a relatively narrow voltage regulation range for transformers, making it difficult to meet the diverse voltage requirements of different electrical equipment. When the voltage requirements of electrical equipment exceed the transformer's regulation range, it is necessary to replace the transformer or use other voltage regulating equipment, increasing cost and complexity. Therefore, we have made improvements and proposed an insulated tap changer three-phase dry-type transformer. Utility Model Content

[0005] The purpose of this utility model is to address the problems raised in the existing background technology. To achieve the above-mentioned utility model objective, this utility model provides the following technical solution: an insulated tap-connected three-phase dry-type transformer, including a transformer housing, windings disposed on the transformer housing, winding guide rods disposed on the windings, winding insulation components disposed on the winding guide rods, auxiliary heat dissipation fins disposed on the outer surface of the transformer housing, and a tap-connection mechanism disposed on the top of the transformer housing.

[0006] As a preferred embodiment of this invention, the winding includes a low-voltage winding and a high-voltage winding.

[0007] As a preferred technical solution of this utility model, the winding insulation assembly includes a winding insulation layer and interlayer insulation. The winding insulation layer is disposed on the winding guide rod, and interlayer insulation is disposed between the winding insulation layers.

[0008] As a preferred embodiment of this invention, the winding guide rod is mounted on the winding support, and the winding support is mounted on the transformer housing.

[0009] As a preferred technical solution of this utility model, the outer surface of the transformer housing is coated with an anti-rust paint layer.

[0010] As a preferred technical solution of this utility model, a base frame is provided at the bottom of the transformer housing, and an installation channel steel is provided below the base frame, which is installed on insulating sleepers.

[0011] As a preferred technical solution of this utility model, the tapping mechanism is provided with a tapping rod, and a tapping contact head is provided above the tapping rod.

[0012] As a preferred technical solution of this utility model, an iron core is provided inside the transformer housing, and a three-phase coil is provided in the iron core.

[0013] As a preferred technical solution of this utility model, a clamping plate is provided on the three-phase coil, and a wiring contact is provided on the clamping plate.

[0014] As a preferred technical solution of this utility model, an isolation plate is provided below the three-phase coil, and a mounting cone is provided at the corner of the isolation plate.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: The winding insulation component plays a key role, with the winding insulation layer wrapping around the winding conductor, effectively preventing leakage current, and interlayer insulation avoiding short circuits between winding layers. This not only improves the safety of transformer operation and reduces the probability of electrical faults, but also ensures the personal safety of operators, making it suitable for locations with high insulation requirements. The auxiliary heat dissipation fins on the outer surface of the transformer shell greatly increase the contact area with air, quickly dissipating the heat generated during transformer operation. This helps reduce the transformer's operating temperature, extend its service life, reduce equipment damage and maintenance costs caused by overheating, and ensure the stability of the transformer during long-term operation. Flexible voltage adjustment: The tapping rod of the tapping mechanism can be connected to tapping contacts at different positions, facilitating changes in the winding turns ratio and achieving flexible adjustment of the output voltage. It can provide appropriate voltage in a timely and accurate manner according to different power needs, improving the efficiency of power utilization and adapting to various complex power environments. Good protection: The outer surface of the transformer shell is coated with an anti-rust paint layer, which can effectively resist oxidation and corrosion, extending the service life of the shell. The base frame, mounting channel steel, and insulated sleepers form a support and insulation structure that ensures the stable installation of the transformer and also provides insulation to prevent leakage from affecting the ground, thus enhancing the overall safety and reliability. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the internal structure of the present invention;

[0017] Figure 2 This is a structural schematic diagram of the present invention;

[0018] Figure 3 This is a partial structural schematic diagram of the present invention;

[0019] Figure 4 A schematic diagram of the three-phase coil structure provided by this utility model;

[0020] Figure 5 A schematic diagram of the installation channel steel structure provided for this utility model.

[0021] The image shows:

[0022] 1. Transformer housing; 2. Windings; 3. Winding guide rods; 4. Winding insulation layer; 5. Interlayer insulation; 6. Winding support; 7. Auxiliary heat dissipation fins; 8. Base frame; 9. Mounting channel steel; 10. Tap joint rod; 11. Tap joint contact; 12. Iron core; 13. Three-phase coils; 14. Clamping plate; 15. Terminal contact; 16. Isolation plate; 17. Mounting cone seat. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0024] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely illustrates some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. It should be noted that, in the absence of conflict, the embodiments and features and technical solutions in the embodiments of this utility model can be combined with each other. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] Example 1: An insulated tap-connected three-phase dry-type transformer includes a transformer housing 1, a winding 2 disposed on the transformer housing 1, a winding guide rod 3 disposed on the winding 2, a winding insulation assembly disposed on the winding guide rod 3, auxiliary heat dissipation fins 7 disposed on the outer surface of the transformer housing 1, and a tap-connection mechanism disposed on the top of the transformer housing 1. The winding 2 includes a low-voltage winding and a high-voltage winding. The winding insulation assembly includes a winding insulation layer 4 and interlayer insulation 5. The winding insulation layer is disposed on the winding guide rod 3, and interlayer insulation 5 is disposed between the winding insulation layers 4. The winding guide rod 3 is mounted on a winding support 6, and the winding support 6 is disposed on the transformer housing 1. The outer surface of the transformer housing 1 is coated with an anti-rust paint layer. A base frame 8 is disposed at the bottom of the transformer housing 1, and a mounting channel steel 9 is disposed below the base frame 8, which is mounted on insulating sleepers.

[0026] The tapping mechanism is equipped with a tapping rod 10, and a tapping contact head 11 is provided above the tapping rod 10. An iron core 12 is provided inside the transformer housing 1, and a three-phase coil 13 is provided on the iron core 12. A clamping plate 14 is provided on the three-phase coil 13, and a wiring contact 15 is provided on the clamping plate 14. An isolation plate 16 is provided below the three-phase coil 13, and mounting cone seats 17 are provided at the corners of the isolation plate 16.

[0027] Working principle of an insulated tap-connected three-phase dry-type transformer: An insulated tap-connected three-phase dry-type transformer is mainly used to transform three-phase power, while also possessing insulation and heat dissipation characteristics to ensure the safe and stable operation of the transformer. Winding working principle: Winding 2 includes a low-voltage winding and a high-voltage winding. When three-phase AC power is input to the high-voltage winding, according to the principle of electromagnetic induction, the alternating current will generate an alternating magnetic field in the iron core 12. The alternating magnetic field will pass through the low-voltage winding, thereby inducing an electromotive force in the low-voltage winding, thus realizing voltage transformation.

[0028] Working principle of the insulation component: The winding insulation layer 4 in the winding insulation component is set on the winding guide rod 3. It can effectively isolate the electrical connection between the winding guide rod 3 and the winding 2 and prevent leakage.

[0029] The interlayer insulation 5 between the winding insulation layers 4 can further enhance the insulation performance between different layers of the winding, avoid interlayer short circuits, and ensure the normal operation of the winding.

[0030] The outer surface of the transformer housing 1 is provided with auxiliary heat dissipation fins 7, which increases the contact area between the transformer and the air, accelerates heat dissipation, reduces the heat generated during transformer operation, and ensures that the transformer operates within a suitable temperature range.

[0031] The tapping rod 10 of the tapping mechanism can be adjusted to change its connection with the tapping contact 11 at different positions. This changes the turns ratio of the winding, thereby adjusting the transformer's output voltage to meet different power demands.

[0032] Working principle of iron core and three-phase coil: As the main part of the magnetic circuit, iron core 12 provides a good magnetic path for the magnetic field generated by three-phase coil 13, reducing hysteresis and eddy current losses.

[0033] The clamp 14 on the three-phase coil 13 is used to fix the three-phase coil and ensure its structural stability. The wiring contacts 15 are used to make electrical connections with external circuits to realize the input and output of power.

[0034] Working principle of the isolation plate: The isolation plate 16 below the three-phase coil 13 serves to isolate and protect the three-phase coil from electrical interference or collision with other components. The mounting cones 17 at the corners of the isolation plate 16 are used to fix the isolation plate and ensure its stable position.

[0035] Working principle of the protective structure: The outer surface of the transformer shell 1 is coated with an anti-rust paint layer, which can effectively prevent the shell from being oxidized and corroded, and extend the service life of the transformer.

[0036] The base frame 8, mounting channel steel 9, and insulating sleepers at the bottom of the transformer casing 1 constitute a supporting and insulating structure. The base frame 8 supports the transformer casing, and the mounting channel steel 9 connects the base frame to the insulating sleepers. The insulating sleepers not only provide support but also serve as insulation, preventing transformer leakage from affecting the ground.

[0037] Example 2: Insulated tap three-phase dry-type transformer: During the installation and preparation stage, insulating sleepers are placed at the installation location. The insulating sleepers serve as supports and insulation to prevent leakage current from the transformer from being conducted to the ground.

[0038] The mounting channel steel 9 is installed on insulated sleepers to provide a stable foundation structure for the subsequent installation of the transformer. The transformer housing 1 is then mounted on the mounting channel steel 9 via the base frame 8, ensuring the overall stability of the transformer. The transformer is then wired, and the three-phase power supply is connected to the wiring contacts 15 of the three-phase coils 13 to provide input power to the transformer.

[0039] When three-phase alternating current is input to the three-phase coil 13 through the terminal contact 15, an alternating current will flow through the three-phase coil 13. The alternating current generates an alternating magnetic field in the iron core 12. The iron core provides a good magnetic path for the magnetic field, enabling the magnetic field to be concentrated and distributed efficiently.

[0040] An alternating magnetic field passes through winding 2, which includes both low-voltage and high-voltage windings. According to the law of electromagnetic induction, an electromotive force is induced in winding 2. Because the high-voltage and low-voltage windings have different numbers of turns, voltage transformation is achieved, converting the input high-voltage electricity into the required low-voltage electricity or vice versa.

[0041] The winding insulation layer 4 is wrapped around the winding guide rod 3 to prevent leakage between the winding guide rod and the winding, and to ensure that the current flows along the specified path.

[0042] Interlayer insulation 5 is placed between the winding insulation layers 4 to prevent short circuits between different layers of the winding due to electrical connection, and to ensure good electrical insulation performance inside the winding.

[0043] Based on the actual voltage requirements of the electrical equipment, determine whether the transformer's output voltage needs adjustment. This is done by manipulating the tap changer 10 of the tap mechanism, connecting it to different tap contacts 11. Changing the tap position is equivalent to changing the turns ratio of the windings, thereby adjusting the transformer's output voltage to meet different power requirements.

[0044] During operation, transformers generate heat due to the resistance of the windings, the hysteresis of the iron core, and eddy currents, causing the transformer temperature to rise.

[0045] The auxiliary heat dissipation fins 7 on the outer surface of the transformer housing 1 increase the contact area with the air, accelerating heat dissipation. Natural air convection or external ventilation equipment carries heat away from the heat dissipation fins, keeping the transformer within a suitable operating temperature range.

[0046] Regularly inspect the transformer, including checking the insulation of winding 2, the connection status of the tap changer, and the tightness of the terminals 15.

[0047] Check the anti-rust paint layer on the outer surface of the transformer housing 1 for damage. If there is any damage, repair it in time to prevent the housing from rusting and corroding.

[0048] Monitor the transformer temperature in real time. When the temperature is too high, investigate the cause in time, which may be due to excessive load or poor heat dissipation. Take corresponding measures to deal with the problem, such as adjusting the load and checking the ventilation equipment.

[0049] When it is necessary to inspect or stop the transformer, first disconnect the power supply to the three-phase coil 13 to ensure that the transformer is no longer working.

[0050] Perform a discharge operation on the transformer to release any residual charge and ensure the safety of the operators. Then, relevant inspection or maintenance work can be carried out.

[0051] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. An insulated tap-connected three-phase dry-type transformer, comprising a transformer housing (1), characterized in that, The transformer housing (1) is provided with a winding (2), a winding guide rod (3) is provided on the winding (2), a winding insulation component is provided on the winding guide rod (3), an auxiliary heat dissipation fin (7) is provided on the outer surface of the transformer housing (1), and a tapping mechanism is provided on the top of the transformer housing (1).

2. The insulated tap-connected three-phase dry-type transformer according to claim 1, characterized in that, The winding (2) includes a low-voltage winding and a high-voltage winding.

3. The insulated tap-connected three-phase dry-type transformer according to claim 2, characterized in that, The winding insulation assembly includes a winding insulation layer (4) and interlayer insulation (5). The winding insulation layer is disposed on the winding guide rod (3), and interlayer insulation (5) is disposed between the winding insulation layers (4).

4. The insulated tap-connected three-phase dry-type transformer according to claim 3, characterized in that, The winding guide rod (3) is mounted on the winding support (6), which is located on the transformer housing (1).

5. A three-phase dry-type transformer with insulated taps according to claim 4, characterized in that, The outer surface of the transformer housing (1) is coated with an anti-rust paint layer.

6. A three-phase dry-type transformer with insulated taps according to claim 5, characterized in that, The transformer housing (1) is provided with a base frame (8) at the bottom, and a mounting channel steel (9) is provided below the base frame (8). The mounting channel steel (9) is installed on the insulating sleepers.

7. A three-phase dry-type transformer with insulated taps according to claim 6, characterized in that, The tapping mechanism is provided with a tapping rod (10), and a tapping contact head (11) is provided above the tapping rod (10).

8. A three-phase dry-type transformer with insulated taps according to claim 7, characterized in that, The transformer housing (1) is provided with an iron core (12), and the iron core (12) is provided with a three-phase coil (13).

9. A three-phase dry-type transformer with insulated taps according to claim 8, characterized in that, The three-phase coil (13) is provided with a clamp (14), and the clamp (14) is provided with a wiring contact (15).

10. A three-phase dry-type transformer with insulated taps according to claim 9, characterized in that, An isolation plate (16) is provided below the three-phase coil (13), and an installation cone seat (17) is provided at the corner of the isolation plate (16).

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