Insulation cushion block with heat dissipation structure for dry-type transformer

Abstract

The utility model discloses an insulation cushion block with a heat dissipation structure for a dry-type transformer, which comprises a coil winding and insulation cushion blocks arranged at two ends of the coil winding, and an anti-skid pad is arranged between each insulation cushion block and the coil winding. A plurality of air channel holes are evenly distributed in the coil winding along the circumference at equal intervals, a plurality of first ventilation holes are formed in the non-slip mat, and a plurality of supporting arms are arranged on the insulating cushion block. By means of the first ventilation holes and the second ventilation holes matched with the positioning holes, heat in the covered air passage holes can be effectively discharged, the heat dissipation condition of the coil winding is remarkably improved, abnormal rising of local temperature is avoided, and therefore safe and stable operation of the transformer is guaranteed. Meanwhile, due to the design of the heat dissipation holes located above and below the air channel holes, the discharge amount of hot air is increased synergistically, missing air is supplemented, the inlet amount of cold air is increased, the air convection speed is increased, and then the overall heat exchange efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of dry-type transformer technology, and in particular to an insulating pad with a heat dissipation structure for dry-type transformers. Background Technology

[0002] Dry-type transformers are widely used in local lighting, high-voltage buildings, airports, docks, CNC machinery, and other applications. Simply put, a dry-type transformer is a transformer whose core and windings are not immersed in insulating oil. Cooling methods for dry-type transformers are divided into natural air cooling (AN) and forced air cooling (AF). With natural air cooling, the transformer can operate continuously at its rated capacity for extended periods. With forced air cooling, the transformer's output capacity can be increased by 50%, making it suitable for intermittent overload operation or emergency overload operation. However, because load losses and impedance voltage increase significantly under overload conditions, it is in an uneconomical operating state and should not be operated continuously under overload for extended periods.

[0003] In existing dry-type transformer structures, the coil windings are fixed using insulating pads to prevent displacement during transportation and operation. To reduce friction between the insulating pads and the coil windings, rubber gaskets are added between them. However, multiple vent holes along the circumferential direction inside the coil windings are partially covered by these rubber gaskets, hindering their heat dissipation function and causing abnormal localized temperature increases in the transformer, affecting its safe and stable operation. Therefore, the applicant has developed a beneficial design and found a solution to the above problems. The technical solution described below arose from this background. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of traditional dry-type transformer designs and provide a product that offers stable operation and improved heat dissipation efficiency.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] An insulating pad with a heat dissipation structure for a dry-type transformer includes a coil winding and insulating pads disposed at both ends thereon. An anti-slip pad is provided between the insulating pad and the coil winding. The coil winding is provided with a plurality of equally spaced air passage holes evenly distributed along its circumference. The anti-slip pad is provided with a plurality of first ventilation holes. The insulating pad is provided with a plurality of support arms. The support arms are provided with positioning holes. The sidewall of the positioning hole is provided with at least one second ventilation hole. The sidewall of the air passage hole is provided with a plurality of equally spaced heat dissipation holes from top to bottom.

[0007] Preferably, the coil winding includes a high-voltage winding, a low-voltage winding, and an iron core; the air passage is provided in the high-voltage winding and the low-voltage winding; the heat dissipation hole is provided on the outer wall of the high-voltage sleeve; and the high-voltage winding and the low-voltage winding are provided with grooves to prevent the displacement of the insulating pad.

[0008] Preferably, the portion where the positioning hole meets the first ventilation hole is provided with an expansion portion.

[0009] Preferably, the anti-slip pad has an abutment portion and is tightly wrapped around the outside of the support arm, the abutment portion being located below the second ventilation hole.

[0010] Preferably, the second ventilation hole is disposed on the side wall of each positioning hole.

[0011] Beneficial effects:

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] (1) In this utility model, by setting a first ventilation hole on the anti-slip pad, the heat accumulated in the air passage hole covered by it can be introduced into the positioning hole through the first ventilation hole and discharged through the second ventilation hole of the positioning hole, which effectively improves the heat dissipation conditions of the coil winding, avoids abnormal local temperature rise, and thus ensures the safe and stable operation of the transformer.

[0014] (2) In this utility model, the heat dissipation hole located above the air passage effectively increases the amount of hot air discharged from the coil winding, while the heat dissipation hole located below the air passage replenishes the air missing in the air passage. This design works together to increase the amount of cold air entering the air passage and improve the internal air convection speed, thereby improving the overall heat exchange efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an insulating pad with a heat dissipation structure for a dry-type transformer according to the present invention;

[0016] Figure 2 This is an exploded view of an insulating pad with a heat dissipation structure for a dry-type transformer according to the present invention.

[0017] Figure 3 This utility model Figure 2 A partial enlarged view A of an insulating pad with a heat dissipation structure for a dry-type transformer;

[0018] The correspondence between the labels and component names in the attached figures is as follows:

[0019] Reference numerals: 1. Coil winding; 2. Insulating pad; 3. Anti-slip pad; 4. Air duct; 5. High voltage winding; 6. Low voltage winding; 7. Iron core; 8. Slot; 21. Support arm; 22. Positioning hole; 23. Second ventilation hole; 221. Expansion part; 31. First ventilation hole; 32. Contact part; 41. Heat dissipation hole. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0023] Reference example Figures 1 to 3 An insulating pad with a heat dissipation structure for a dry-type transformer includes a coil winding 1 and insulating pads 2 disposed at both ends thereon. An anti-slip pad 3 is provided between the insulating pad 2 and the coil winding 1. The coil winding 1 is provided with a plurality of equally spaced air passage holes 4 evenly distributed along the circumference. The anti-slip pad 3 is provided with a plurality of first ventilation holes 31. The insulating pad 2 is provided with a plurality of support arms 21. The support arms 21 are provided with positioning holes 22. The side wall of the positioning hole 22 is provided with at least one second ventilation hole 23. The side wall of the air passage holes 4 is provided with a plurality of equally spaced heat dissipation holes 41 from top to bottom. By providing the first ventilation holes 31 on the anti-slip pad 3, the heat accumulated in the air passage holes 4 covered by it can be introduced into the positioning hole 22 through the first ventilation holes 31 and discharged through the second ventilation hole 23 of the positioning hole 22, which effectively improves the heat dissipation conditions of the coil winding 1, avoids abnormal local temperature rise, and thus ensures the safe and stable operation of the transformer.

[0024] It is worth mentioning that the coil winding 1 includes a high-voltage winding 5, a low-voltage winding 6, and an iron core 7. Air passage holes 4 are provided in the high-voltage winding 5 and the low-voltage winding 6, and heat dissipation holes 41 are provided on the outer wall of the high-voltage sleeve. The high-voltage winding 5 and the low-voltage winding 6 are provided with grooves 8 to prevent the displacement of the insulating pad 2. The heat dissipation holes 41 located above the air passage holes 4 effectively increase the amount of hot air discharged from the coil winding 1, while the heat dissipation holes 41 located below the air passage holes 4 replenish the air missing in the air passage holes 4. This design works synergistically to increase the amount of cold air entering the air passage holes 4 and improve the internal air convection speed, thereby improving the overall heat exchange efficiency.

[0025] It is worth mentioning that an expansion portion 221 is provided at the part where the positioning hole 22 meets the first ventilation hole 31. The design of the expansion portion 221 helps to increase the amount of hot air flowing into the positioning hole 22 from the first ventilation hole 31, thereby improving the exhaust speed of the hot air.

[0026] It is worth mentioning that the anti-slip pad 3 is provided with an abutment part 32 and is tightly wrapped around the outside of the support arm 21. The abutment part 32 is located below the second ventilation hole 23. The abutment part 32 can pre-fix the anti-slip pad 3 to the support arm 21, thereby simplifying the assembly process of the insulating pad 2 and the coil winding 1 without repeated adjustments, thus improving the overall assembly efficiency.

[0027] It is worth mentioning that the second ventilation hole 23 is provided on the side wall of each positioning hole 22, and the multiple second ventilation holes 23 further improve the hot air exhaust speed of the positioning hole 22.

[0028] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. An insulating pad (2) with a heat dissipation structure for a dry-type transformer, comprising a coil winding (1) and insulating pads (2) disposed at both ends thereof, wherein an anti-slip pad (3) is provided between the insulating pad (2) and the coil winding (1), and the coil winding (1) is provided with a plurality of equally spaced air passage holes (4) evenly distributed along its circumference, characterized in that: The anti-slip mat (3) is provided with a number of first ventilation holes (31), the insulating pad (2) is provided with a number of support arms (21), the support arms (21) are provided with positioning holes (22), the side wall of the positioning holes (22) is provided with at least one second ventilation hole (23), and the side wall of the air passage hole (4) is provided with a number of equally spaced heat dissipation holes (41) from top to bottom.

2. The insulating pad (2) with a heat dissipation structure for a dry-type transformer according to claim 1, characterized in that: The coil winding (1) includes a high-voltage winding (5), a low-voltage winding (6), and an iron core (7). The air passage (4) is provided in the high-voltage winding (5) and the low-voltage winding (6). The heat dissipation hole (41) is provided on the outer wall of the high-voltage sleeve. The high-voltage winding (5) and the low-voltage winding (6) are provided with grooves (8) to prevent the displacement of the insulating pad (2).

3. The insulating spacer block (2) with a heat dissipation structure for a dry-type transformer according to claim 1, characterized in that: An expansion portion (221) is provided at the part where the positioning hole (22) meets the first ventilation hole (31).

4. The insulating spacer block (2) with a heat dissipation structure for a dry-type transformer according to claim 1, characterized in that: The anti-slip mat (3) has an abutment part (32) and is tightly wrapped around the outside of the support arm (21). The abutment part (32) is located below the second ventilation hole (23).

5. The insulating spacer block (2) with a heat dissipation structure for a dry-type transformer according to claim 1, characterized in that: The second ventilation hole (23) is provided on the side wall of each positioning hole (22).

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