Dry-type transformer with noise reduction and heat dissipation structure

Abstract

A dry-type transformer with a noise reduction and heat dissipation structure comprises a box body and a transformer body arranged in the box body, mounting openings are formed in the two opposite sides of the box body, heat dissipation and noise reduction units are arranged on the two mounting openings, each heat dissipation and noise reduction unit comprises a sound insulation box and a plurality of heat dissipation cylinders arranged on the sound insulation box, and an outer frame of the sound insulation box is detachably connected with the mounting openings; the position of the soundproof box in the horizontal direction is adjustable, and the box body communicates with the outside through the heat dissipation cylinder; the heat dissipation barrel comprises an air inlet and an air outlet, and a plurality of arc-shaped sound absorption plates which are arranged in a staggered mode are arranged in the heat dissipation barrel in the axis direction of the heat dissipation barrel. The heat dissipation barrels arranged in the sound insulation box can achieve the effect of ventilation between the box body and the outside, the multiple heat dissipation barrels symmetrically arranged on the two sides of the box body are matched with the ventilation openings in the bottom of the box body, air in the box body can form convection, the ventilation and heat dissipation effects are achieved, the multiple arc-shaped sound insulation plates in the heat dissipation barrels can reflect sound waves, and the sound insulation effect is good. Sound waves are reflected in the pipeline for multiple times, and propagation energy is reduced.

Description

Technical Field

[0001] This utility model relates to the field of dry-type transformer technology, specifically a dry-type transformer with a noise reduction and heat dissipation structure. Background Technology

[0002] Dry-type transformers generate some noise during operation, mainly due to electromagnetic vibration and the operation of cooling fans. In certain applications, especially in noise-sensitive environments, noise reduction for dry-type transformers is essential.

[0003] Existing technologies for noise reduction in dry-type transformers typically involve arranging noise-absorbing cotton on the inner wall of the transformer housing. This cotton absorbs noise, achieving the desired reduction. For example, patent CN213025776U describes a noise reduction structure for dry-type transformers where a frame containing noise-absorbing cotton is inserted into the side of the outer casing. This allows the frame to block noise generated by the transformer, and the cotton effectively reduces noise, preventing its propagation. However, in this case, the cooling fan is located at the bottom of the casing, with only a vent there. This fails to create convection current within the casing, resulting in poor heat dissipation and significant noise generation from the fan itself, leading to inefficient operation. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model provides a dry-type transformer with a noise reduction and heat dissipation structure.

[0005] The technical solution of this utility model is as follows:

[0006] A dry-type transformer with a noise reduction and heat dissipation structure includes a housing and a transformer body disposed therein. The housing has mounting ports on both opposite sides, and each mounting port is provided with a heat dissipation and noise reduction unit. The heat dissipation and noise reduction unit includes a soundproof box and multiple heat dissipation cylinders disposed thereon. The outer frame of the soundproof box is detachably connected to the mounting port, and the position of the soundproof box is adjustable in the horizontal direction. The heat dissipation cylinders are horizontally inserted into the soundproof box, and their axes are horizontally set. The housing is connected to the outside through the heat dissipation cylinders.

[0007] The heat sink includes an air inlet and an air outlet. The air inlet has a conical structure, and its inner diameter on the side closest to the transformer body is larger than the inner diameter of the air outlet. The air outlet is located on the outside of the soundproof box. Inside the heat sink, multiple staggered arc-shaped sound-absorbing panels are arranged along its axial direction.

[0008] Part of the soundproof box protrudes outward from the outside of the box body, while part is located inside the box body, which can reduce the space occupied inside the box body. The heat dissipation tubes installed inside the soundproof box body can achieve the effect of ventilation between the box body and the outside. Multiple heat dissipation tubes symmetrically arranged on both sides of the box body, together with the ventilation openings at the bottom of the box body, can create air convection inside the box body, achieving the effect of ventilation and heat dissipation. Multiple arc-shaped sound insulation panels inside the heat dissipation tubes can reflect sound waves, causing the sound waves to reflect multiple times in the pipes, reducing their propagation energy.

[0009] The specific structure of the aforementioned heat sink is as follows: the heat sink includes a straight cylinder and a conical cylinder. The conical cylinder is positioned close to the transformer body, and multiple arc-shaped sound-absorbing panels are positioned inside the straight cylinder, with the arc-shaped sound-absorbing panels being coaxially positioned with the straight cylinder.

[0010] To improve the heat dissipation effect of the heat sink while reducing noise, the arc length of the curved sound-absorbing plate is set to be smaller than the arc length corresponding to the radius of the straight cylinder, so that a small amount of hot air can pass smoothly through the middle of the heat sink.

[0011] To improve the noise reduction effect on the side of the heat sink closer to the dry-type transformer, sound-absorbing cotton is installed on the inner wall of the conical cylinder.

[0012] To improve the overall noise reduction effect of the heat sink, the part of the heat sink located inside the soundproof box has multiple sound-absorbing holes that communicate with the soundproof box. Foam plastic is filled between the outer surface of the heat sink and the inner surface of the soundproof box. Sound waves can enter the soundproof box through the sound-absorbing holes, and the foam plastic absorbs the sound waves, thus achieving a noise reduction effect.

[0013] The specific structure of the soundproof box that can be adjusted horizontally is as follows: the soundproof box is equipped with adjustment plates at the upper and lower ends of the inner side of the box. The adjustment plates are connected to the box body by adjustment bolts. The axis of the adjustment bolts is parallel to the axis of the heat dissipation cylinder, and one end of the adjustment bolts is rotatably connected to the adjustment plates. By adjusting the distance between the two relative soundproof boxes, the ventilation channel is extended, which can increase the propagation path of sound waves in the channel, thereby increasing the attenuation and absorption of sound waves.

[0014] The specific structure of the adjusting plate is as follows: the adjusting plate includes two parallel plates, a first plate and a second plate. The second plate is located close to the transformer body. The adjusting bolt passes through the housing and is rotatably connected to the first plate. The adjusting bolt is threadedly connected to the housing, and a stop block is provided at the end of the adjusting bolt located between the first plate and the second plate.

[0015] The beneficial effects of this utility model are as follows:

[0016] Two heat dissipation and noise reduction units are symmetrically arranged on both sides of the enclosure. The heat dissipation cylinders of the two heat dissipation and noise reduction units can achieve a good convection effect. The conical cylinder is close to the dry-type transformer side, which facilitates the hot air to enter the straight cylinder along the inner wall of the conical cylinder and then be discharged to the outside of the enclosure, so as to facilitate the rapid discharge of the heat generated by the dry-type transformer inside the enclosure.

[0017] The heat sink can reduce the noise of sound waves generated by dry-type transformers. Multiple arc-shaped sound insulation plates can reflect sound waves, causing them to reflect multiple times inside the pipe, thus reducing their propagation energy. By opening sound-absorbing holes on the outer walls of both the straight and conical cylinders, some sound waves can be transmitted to the sound insulation box, where the foam plastic inside the box absorbs the sound waves.

[0018] The soundproof box is exposed on the outside of the box, and its interior is prone to moisture or water ingress. Therefore, the sound-absorbing material inside the soundproof box is made of foam plastic. Attached Figure Description

[0019] In the attached diagram:

[0020] Figure 1 This is a schematic diagram of the internal structure;

[0021] Figure 2 This is a top view;

[0022] Figure 3 for Figure 2 A schematic diagram of the AA-direction cross-section structure;

[0023] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0024] Figure 5 This is a schematic diagram of the heat sink structure;

[0025] Figure 6 This is a structural diagram;

[0026] The components represented by the various reference numerals in the diagram are:

[0027] 1. Transformer body; 2. Enclosure; 3. Soundproof enclosure; 4. Heat sink; 41. Straight cylinder; 411. Air outlet; 42. Conical cylinder; 421. Air inlet; 43. Silencing hole; 44. Heat sink; 5. Arc-shaped sound-absorbing panel; 6. Sound-absorbing cotton; 7. Foam plastic; 8. First plate; 9. Second plate; 10. Adjusting bolt; 11. Stop block. Detailed Implementation

[0028] See Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, a dry-type transformer with a noise reduction and heat dissipation structure includes a housing 2 and a transformer body 1 disposed therein. The housing 2 has mounting ports on opposite sides, and each mounting port is equipped with a heat dissipation and noise reduction unit, which are symmetrically arranged. Each heat dissipation and noise reduction unit includes a soundproof enclosure 3 and multiple heat dissipation cylinders 4 disposed thereon. The outer frame of the soundproof enclosure 3 is detachably connected to the mounting port, and a sealing strip is provided at the connection between the outer frame of the soundproof enclosure 3 and the mounting port.

[0029] See Figure 1 and Figure 3 As shown, multiple heat dissipation cylinders 4 are horizontally inserted into the soundproof box 3. These cylinders 4 are arranged in a rectangular pattern on the soundproof box 3, with their axes horizontally aligned to facilitate ventilation. The box 2 can communicate with the outside through the heat dissipation cylinders 4. In this embodiment, part of the soundproof box 3 protrudes outward from the outside of the box 2, while part is located inside the box 2, reducing the space occupied inside the box 2. The heat dissipation cylinders 4 installed inside the soundproof box 3 provide ventilation between the box 2 and the outside.

[0030] See Figure 4 and Figure 5 As shown, the specific structure of the heat sink 4 is as follows: the heat sink 4 includes a straight cylinder 41 and a conical cylinder 42 on the same axis. One end of the straight cylinder 41 is sealed to the smaller end of the conical cylinder 42. The conical cylinder 42 is located close to the transformer body 1. To improve the noise reduction effect of the heat sink 4 on the side close to the dry-type transformer, the inner wall of the conical cylinder 42 is provided with sound-absorbing cotton 6. The sound-absorbing cotton 6 can pre-absorb sound waves. In this embodiment, the inner wall of the straight cylinder 41 can also be provided with sound-absorbing cotton 6, which, together with the sound-absorbing cotton 6 of the conical cylinder 42, provides an auxiliary sound absorption effect for sound waves. In this embodiment, the outer wall of the heat sink 4 is provided with multiple heat sinks 44. The multiple heat sinks 44 are equally spaced along the circumferential direction of the heat sink 4, and the heat sinks 44 can perform heat dissipation.

[0031] See Figure 4 As shown, the side of the conical cylinder 42 closest to the dry-type transformer is the air inlet 421, and the side of the straight cylinder 41 furthest from the conical cylinder 42 is the air outlet 411. The inner diameter of the air inlet 421 closest to the transformer body 1 is larger than the inner diameter of the air outlet 411. The conical cylinder 42 guides the hot air generated by the dry-type transformer, facilitating the guidance of the hot air into the straight cylinder 41 for noise reduction before it is discharged outside the enclosure 2. The air outlet 411 is located outside the soundproof enclosure 3. Inside the straight cylinder 41, multiple staggered arc-shaped sound-absorbing panels 5 are arranged along its axial direction, and the arc-shaped sound-absorbing panels 5 are coaxially arranged with the straight cylinder 41. To improve the heat dissipation effect of the heat dissipation cylinder 4 while reducing noise, the arc length of the arc-shaped sound-absorbing panels 5 is set to be smaller than the arc length corresponding to the radius of the straight cylinder 41, so that a small portion of hot air can pass smoothly through the middle of the heat dissipation cylinder 4.

[0032] See Figure 4 and Figure 5As shown, to improve the overall noise reduction effect of the heat sink 4, the portion of the heat sink 4 located inside the soundproof box 3 has multiple sound-absorbing holes 43 that communicate with the soundproof box 3. Foam plastic 7 is filled between the outer surface of the heat sink 4 and the inner surface of the soundproof box 3. Sound waves can enter the soundproof box 3 through the sound-absorbing holes 43, and the foam plastic 7 absorbs the sound waves, thus achieving a noise reduction effect. Since part of the soundproof box 3 is exposed outside the box body 2, its interior is prone to moisture or water ingress. Therefore, the sound-absorbing material inside the soundproof box 3 is set as foam plastic 7.

[0033] In this embodiment, the horizontal position of the soundproof box 3 is adjustable. By adjusting the distance between the two relative soundproof boxes 3, the ventilation channel is extended, which increases the propagation path of sound waves within the channel, thereby increasing the attenuation and absorption of sound waves. Specifically, the soundproof box 3 is adjustable in the horizontal direction by having adjustment plates at both the upper and lower ends of its inner side within the box body 2. These adjustment plates are connected to the box body 2 via adjustment bolts 10. The axis of the adjustment bolts 10 is parallel to the axis of the heat dissipation cylinder 4, and one end of the adjustment bolts 10 is rotatably connected to the adjustment plates. By adjusting the distance between the two relative soundproof boxes 3, the ventilation channel is extended, which increases the propagation path of sound waves within the channel, thereby increasing the attenuation and absorption of sound waves.

[0034] The specific structure of the adjusting plate is as follows: the adjusting plate includes two parallel plates, a first plate 8 and a second plate 9. The second plate 9 is located close to the transformer body 1. The first plate 8 has a round hole. The adjusting bolt 10 passes through the housing 2 and is rotatably connected to the round hole of the first plate 8. The adjusting bolt 10 is threadedly connected to the housing 2. A stop block 11 is provided at the end of the adjusting bolt 10 located between the first plate 8 and the second plate 9. The outer diameter of the stop block 11 is larger than the inner diameter of the round hole, which limits the adjustment bolt 10. When the adjusting bolt 10 is tightened, it moves inward to the housing 2, causing the soundproof box 3 to move inward. When the adjusting bolt 10 is loosened, it moves outward to the housing 2, causing the soundproof box 3 to move outward, thereby increasing the distance between the two soundproof boxes 3 and extending the propagation path of the sound waves.

Claims

1. A dry-type transformer with a noise reduction and heat dissipation structure, comprising a housing (2) and a transformer body (1) disposed therein, characterized in that, The box (2) has mounting ports on both sides opposite to each other. Each mounting port is equipped with a heat dissipation and noise reduction unit. The heat dissipation and noise reduction unit includes a soundproof box (3) and multiple heat dissipation cylinders (4) set thereon. The outer frame of the soundproof box (3) is detachably connected to the mounting port. The position of the soundproof box (3) is adjustable in the horizontal direction. The heat dissipation cylinders (4) are installed in the soundproof box (3) in the horizontal direction. Their axis is set horizontally. The box (2) is connected to the outside through the heat dissipation cylinders (4). The heat sink (4) includes an air inlet (421) and an air outlet (411). The air inlet (421) is a conical structure, and its inner diameter on the side closer to the transformer body (1) is larger than the inner diameter of the air outlet (411). The air outlet (411) is located outside the soundproof box (3). Multiple arc-shaped sound-absorbing plates (5) are arranged in a staggered manner inside the heat sink (4) along its axial direction.

2. A dry-type transformer with a noise reduction and heat dissipation structure according to claim 1, characterized in that, The heat dissipation cylinder (4) includes a straight cylinder (41) and a conical cylinder (42). The conical cylinder (42) is located close to the transformer body (1). Multiple arc-shaped sound-absorbing plates (5) are located inside the straight cylinder (41) and are coaxially arranged with the straight cylinder (41).

3. A dry-type transformer with a noise reduction and heat dissipation structure according to claim 2, characterized in that, The arc length of the arc-shaped sound-absorbing plate (5) is less than the arc length corresponding to the radius of the straight cylinder (41).

4. A dry-type transformer with a noise reduction and heat dissipation structure according to claim 2, characterized in that, The inner wall of the conical cylinder (42) is provided with sound-absorbing cotton (6).

5. A dry-type transformer with a noise reduction and heat dissipation structure according to claim 1, characterized in that, The portion of the heat sink (4) located inside the soundproof box (3) has multiple sound-absorbing holes (43) that communicate with the soundproof box (3), and foam plastic (7) is filled between the outer surface of the heat sink (4) and the inner surface of the soundproof box (3).

6. A dry-type transformer with a noise reduction and heat dissipation structure according to claim 1, characterized in that, The soundproof box (3) is equipped with adjustment plates at the upper and lower ends of the inner side of the box body (2). The adjustment plates are connected to the box body (2) by adjustment bolts (10). The axis of the adjustment bolts (10) is parallel to the axis of the heat sink (4), and one end of the adjustment bolts (10) is rotatably connected to the adjustment plates.

7. A dry-type transformer with a noise reduction and heat dissipation structure according to claim 6, characterized in that, The adjusting plate includes two parallel plates (8) and a second plate (9). The second plate (9) is located close to the transformer body (1). The adjusting bolt (10) passes through the housing (2) and is rotatably connected to the first plate (8). The adjusting bolt (10) is threadedly connected to the housing (2). A stop block (11) is provided at the end of the adjusting bolt (10) located between the first plate (8) and the second plate (9).

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