Noise reduction acoustic board and transformer

Abstract

The utility model relates to a noise reduction acoustic board and a transformer. The noise reduction and sound absorption plate comprises a supporting structure which comprises a first supporting unit, a second supporting unit and a third supporting unit which are spliced with one another, and microwell plates are installed on the two sides of the supporting structure; a plurality of sound absorption holes are uniformly distributed in the micro-pore plate and are used for absorbing noise. The noise reduction acoustic board can effectively reduce noise of the transformer.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer noise reduction technical field, especially noise reduction sound absorption board and transformer. BACKGROUND

[0002] With the vigorous development of new energy industry, the demand of transformer and other products is also very huge. But most of the transformer products have the problem of large noise, and most of the noise of transformer and other products is caused by vibration, in addition to the magnetic flux vibration in the magnetic circuit of transformer product, and the mechanical vibration generated when the structure of transformer product runs. With the development of society, people's health and safety requirements are constantly improving, and the market demand for noise of transformer and other products is also increasing.

[0003] In the related art, there are many methods for transformer noise reduction, such as adding sound insulation screen cover, optimizing layout design, shock absorption, magnetic shielding method, etc. However, the related art cannot effectively reduce the noise of the transformer. UTILITY MODEL CONTENT

[0004] Therefore, it is necessary to provide a noise reduction sound absorption board to solve the problem that the related art cannot effectively reduce the noise of the transformer.

[0005] A noise reduction sound absorption board comprises:

[0006] A support structure comprising a first support unit, a second support unit and a third support unit that are spliced with each other, and a microporous plate installed on both sides of the support structure;

[0007] The microporous plate is uniformly provided with a plurality of sound absorption holes for absorbing noise.

[0008] In one embodiment, the shape of the sound absorption hole is circular.

[0009] In one embodiment, the first support unit, the second support unit and the third support unit are provided with notches, and the first support unit, the second support unit and the third support unit are spliced with each other through the notches.

[0010] In one embodiment, the first support unit is provided with a first notch, the second support unit is provided with a second notch, the size of the first notch is the same as that of the second notch, and the first notch of the first support unit is spliced with the second notch of the second support unit.

[0011] In one of the embodiments, the third support unit is provided with a third gap, a fourth gap and a fifth gap, the third gap has the same size as the first gap, the fourth gap has a smaller length than the first gap, and the fifth gap has a larger length than the thickness of the second support unit, the third gap and the fourth gap of the third support unit are spliced with the first gap of the first support unit, and the fifth gap of the third support unit is spliced with the second support unit.

[0012] In one of the embodiments, a first positioning hole is arranged between the second gaps, and the first positioning hole is used to fix the noise reduction and sound absorption plate to the tank wall of the transformer.

[0013] In one of the embodiments, the thickness of the first support unit is smaller than the thickness of the second support unit, and the thickness of the third support unit is the same as the thickness of the first support unit.

[0014] In one of the embodiments, the material of the micro-hole plate is paperboard, and the materials of the first support unit, the second support unit and the third support unit are laminated wood.

[0015] The noise reduction and sound absorption plate can improve the sound absorption capacity and effectively absorb noise by installing the micro-hole plate on both sides of the support structure, and the micro-hole plate is uniformly provided with a plurality of sound absorption holes. The uniform arrangement of the sound absorption holes of the micro-hole plate can reduce the resonance phenomenon of the plate itself and reduce the amplification effect of noise. The support structure includes the first support unit, the second support unit and the third support unit which are spliced with each other, which not only can fix and support the micro-hole plate, but also can improve the overall strength of the noise reduction and sound absorption plate.

[0016] A transformer includes an oil tank, a body assembly and the noise reduction and sound absorption plate according to any one of the embodiments, and the noise reduction and sound absorption plate is arranged between the oil tank and the body assembly.

[0017] In one of the embodiments, the transformer further includes:

[0018] The fixing structure includes a first pad, a second pad and a bolt, the first pad and the second pad are arranged on both sides of the noise reduction and sound absorption plate respectively, the first pad is provided with a second positioning hole, the second pad is provided with a third positioning hole, and the bolt passes through the second positioning hole, the first positioning hole arranged on the second support unit and the third positioning hole in sequence to fix the noise reduction and sound absorption plate to the tank wall of the oil tank.

[0019] The transformer, the noise reduction sound absorption plate is arranged between the oil tank and the body assembly of the transformer, the noise reduction sound absorption plate comprises a supporting structure and a microporous plate mounted on both sides of the supporting structure. By mounting the microporous plate on both sides of the supporting structure, and uniformly distributing a plurality of sound absorption holes on the microporous plate, the sound absorption capacity can be improved, and the noise generated by the transformer can be effectively absorbed. The uniform sound absorption hole arrangement of the microporous plate can reduce the resonance phenomenon of the plate itself, and reduce the amplification effect of the transformer noise. The supporting structure comprises a first supporting unit, a second supporting unit and a third supporting unit which are spliced with each other, which not only can fix and support the microporous plate, but also can improve the overall strength of the noise reduction sound absorption plate, and is not easy to deform or break, so as to ensure the stability and reliability of the plate, and can prolong the service life of the noise reduction sound absorption plate, and ensure the stability of the noise reduction function. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic view of the noise reduction sound absorption plate in an embodiment of the utility model;

[0021] Figure 2 It is Figure 1 It is a partial enlarged schematic view of the noise reduction sound absorption plate in an embodiment of the utility model;

[0022] Figure 3 It is Figure 1 It is a structure schematic view of the first supporting unit in an embodiment of the utility model;

[0023] Figure 4 It is Figure 1 It is a structure schematic view of the second supporting unit in an embodiment of the utility model;

[0024] Figure 5 It is Figure 1 It is a structure schematic view of the third supporting unit in an embodiment of the utility model;

[0025] Figure 6 It is a schematic view of the fixing structure of the transformer in an embodiment of the utility model;

[0026] Figure 7 It is Figure 6 It is a schematic view of the first pad of the fixing structure in an embodiment of the utility model;

[0027] Figure 8 It is Figure 6 It is a schematic view of the second pad of the fixing structure in an embodiment of the utility model.

[0028] BRIEF DESCRIPTION OF DRAWINGS:

[0029] 10. A noise reduction sound absorption board; 100. A microporous board; 101. A sound absorption hole; 201. A first supporting unit; 2011. A first notch; 202. A second supporting unit; 2021. A second notch; 2022. A first positioning hole; 203. A third supporting unit; 2031. A third notch; 2032. A fourth notch; 2033. A fifth notch; 301. A first cushion block; 3011. A second positioning hole; 302. A second cushion block; 3021. A third positioning hole; 303. A bolt. DETAILED DESCRIPTION

[0030] In order to make the above objectives, characteristics and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without some or all of these details under other conditions and / or methods. Therefore, the specific embodiments disclosed below are not intended to limit the scope of the present application, but merely to describe a way of practicing the present application.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0033] In the utility model, unless another definite provision and limitation, the terms "mount", "connect", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication of two elements or the interaction of two elements, unless another definite limitation.For the ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium.Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height.The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the second feature, or only indicate that the first feature is lower than the second feature in horizontal height.

[0035] It should be noted that when an element is referred to as "fixed to" or "provided to" another element, it can be directly on another element or there can be a middle element.When an element is considered "connected" to another element, it can be directly connected to another element or there can be a middle element.The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0036] Referring to Figure 1 , Figure 1 The utility model discloses an embodiment of the utility model provides the structure diagram of the structure of the noise reduction sound absorption board, the noise reduction sound absorption board 10 provided by an embodiment of the utility model, including support structure and microporous plate 100.Support structure, including mutually spliced first support unit 201, second support unit 202 and third support unit 203, and the both sides of support structure are installed with microporous plate 100;Microporous plate 100 is uniformly distributed with a plurality of sound absorption holes 101, for absorbing noise.

[0037] Optionally, the structure of the noise reduction sound absorption board 10 is microporous plate 100 + support structure + microporous plate 100.The support structure in the middle is a support formed by splicing three support units.The support structure plays a role in fixing and supporting the microporous plate 100, improving the overall strength of the noise reduction sound absorption board 10.The surface of the microporous plate 100 arranged on both sides of the support structure is uniformly distributed with a plurality of sound absorption holes 101, and the sound absorption holes 101 are used for absorbing noise.

[0038] Optionally, the noise reduction and sound absorption board 10 is arranged between the oil tank wall of the transformer and the device assembly, and is kept at a proper distance from the oil tank wall and the device assembly. The thickness of the noise reduction and sound absorption board 10 can be set according to the distance between the oil tank wall and the device assembly. For example, the thickness of the noise reduction and sound absorption board 10 can be 46 mm, wherein the thickness of the microporous plate 100 can be 3 mm, and the thickness of the support structure can be 40 mm, that is, the structure of the noise reduction and sound absorption board 10 can be 3 mm microporous plate 100 + 40 mm support structure + 3 mm microporous plate 100.

[0039] Optionally, the first support unit 201, the second support unit 202 and the third support unit 203 can be struts, and the support structure can include a plurality of first support units 201, second support units 202 and third support units 203 spliced with each other.

[0040] In this embodiment, by mounting the microporous plate 100 on both sides of the support structure, and uniformly distributing a plurality of sound absorption holes 101 on the microporous plate 100, the sound absorption capacity can be improved, and the noise can be effectively absorbed. The uniform arrangement of the sound absorption holes 101 of the microporous plate 100 can reduce the resonance phenomenon of the plate itself and reduce the amplification effect of the noise. The support structure includes the first support unit 201, the second support unit 202 and the third support unit 203 spliced with each other, which can not only fix and support the microporous plate 100, but also improve the overall strength of the noise reduction and sound absorption board 10.

[0041] In some embodiments, the material of the microporous plate 100 is paperboard, and the materials of the first support unit 201, the second support unit 202 and the third support unit 203 are laminated wood.

[0042] For example, the material of the microporous plate 100 is paperboard T4 (high-density insulating paperboard), and the materials of the first support unit 201, the second support unit 202 and the third support unit 203 are laminated wood C2B (C2 grade of corrosion-resistant wood).

[0043] In this embodiment, the paperboard material has a certain sound absorption capacity, which can help to absorb the high-frequency noise generated by the transformer during operation, reduce the reflection and propagation of the noise. The laminated wood also has certain sound absorption characteristics, and its structure can help to absorb and attenuate sound, especially low-frequency noise. In addition, the laminated wood also has a certain sound insulation function, which can effectively reduce the propagation of noise from the inside of the transformer to the outside.

[0044] Please refer to Figure 2 , Figure 2 A partial enlarged schematic view of the noise reduction and sound absorption board 10 in an embodiment of the utility model is shown. The shapes of the plurality of sound absorption holes 101 distributed on the microporous plate 100 are circular. For example, the surface of the microporous plate 100 is uniformly distributed with a plurality of sound absorption holes 101 with a diameter of 1 mm.

[0045] Optionally, the sound absorption hole 101 can also be a rectangular, oval or other hole with sound absorption effect. The specific shape of the sound absorption hole 101 can be set according to actual noise reduction needs.

[0046] By uniformly distributing a plurality of circular holes on the microwell plate 100, the plurality of circular holes can play a sound absorption role in the process of sound wave propagation. When the sound wave passes through these holes, the air in the hole will be compressed and expanded, thereby consuming the energy of the sound wave, thereby effectively absorbing noise. The plurality of circular holes can also scatter and diffuse the sound wave, which can effectively attenuate and isolate noise, and has good sound absorption effect on high-frequency and low-frequency noise.

[0047] In some embodiments, the first support unit 201, the second support unit 202 and the third support unit 203 are provided with notches, and the first support unit 201, the second support unit 202 and the third support unit 203 are spliced with each other through the notches.

[0048] Optionally, the shapes of the first support unit 201, the second support unit 202 and the third support unit 203 can be different, and the first support unit 201, the second support unit 202 and the third support unit 203 are provided with notches, and the first support unit 201, the second support unit 202 and the third support unit 203 are spliced with each other through the notches, forming a support structure.

[0049] Optionally, the shape of the notch can be rectangular, which can increase the firmness of the splicing of the support unit.

[0050] The first support unit 201, the second support unit 202 and the third support unit 203 are spliced into a whole through the notches, becoming the main support of the noise reduction and sound absorption plate 10, further improving the overall strength of the noise reduction and sound absorption plate 10.

[0051] In combination with Figure 3 and Figure 4 shown, Figure 3 a structural schematic view of the first support unit 201 in an embodiment of the utility model is shown, Figure 4 a structural schematic view of the second support unit 202 in an embodiment of the utility model is shown. In some embodiments, the first support unit 201 is provided with a first notch 2011, the second support unit 202 is provided with a second notch 2021, the first notch 2011 and the second notch 2021 are the same size, and the first notch 2011 of the first support unit 201 and the second notch 2021 of the second support unit 202 are spliced.

[0052] Optionally, a plurality of first notches 2011 are arranged on the first support unit 201 at a first interval, wherein the first interval can be the same. A plurality of second notches 2021 are arranged on the second support unit 202 at a second interval, wherein the second interval can be the same. The first notches 2011 and the second notches 2021 are of the same size. The first notches 2011 and the second notches 2021 are cross-spliced, thereby realizing splicing of the first support unit 201 and the second support unit 202. Figure 1 Optionally, the first support unit 201 can be arranged horizontally, and the second support unit 202 can be arranged vertically and spliced with the first notches 2011 of the first support unit 201 through the second notches 2021.

[0053] Exemplarily, the first notches 2011 and the second notches 2021 are both 22mm in length and 20mm in width, and can realize stable splicing.

[0054] Please continue to refer to Figure 4 The second notches 2021 are provided with first positioning holes 2022, and the first positioning holes 2022 are used for fixing the noise reduction and sound absorption plate 10 on the oil tank wall of the transformer.

[0055] Optionally, the first positioning holes 2022 can be arranged between two adjacent second notches 2021, and the first positioning holes 2022 are circular through holes. Exemplarily, two first positioning holes 2022 can be arranged on the second support unit 202, and the diameter of the first positioning holes 2022 is 40mm, that is, 2xØ40 through holes. By passing the bolt through the first positioning holes 2022, the noise reduction and sound absorption plate can be fixed on the oil tank wall of the transformer.

[0056] Please refer to Figure 5 , Figure 5 A structure diagram of a third support unit 203 in an embodiment of the utility model is shown. In some embodiments, the third support unit 203 is provided with a third notch 2031, a fourth notch 2032 and a fifth notch 2033, the third notch 2031 is of the same size as the first notch 2011, the length of the fourth notch 2032 is less than that of the first notch 2011, the length of the fifth notch 2033 is greater than the thickness of the second support unit 202, the third notch 2031 and the fourth notch 2032 of the third support unit 203 are spliced with the first notch 2011 of the first support unit 201, and the fifth notch 2033 of the third support unit 203 is spliced with the second support unit 202.

[0057] Optionally, the third support unit 203 is provided with a plurality of third notches 2031, a plurality of fourth notches 2032 and a plurality of fifth notches 3033, and the spacing between the third notches 2031, the fourth notches 2032 and the fifth notches 2033 can be different. The third notches are the same size as the first notches 2011 provided on the first support unit 201, and the third notches 2031 and the fourth notches 2032 of the third support unit 203 are spliced with the first notches 2011 of the first support unit 201. The fifth notches 2033 of the third support unit 203 are spliced with the second support unit 202.

[0058] Exemplarily, the length of the third notches 2031 is 22mm, and the width is 20mm; the length of the fourth notches 2032 is 21mm, and the width is 20mm; and the length of the fifth notches 2033 is 72mm, and the width is 20mm.

[0059] In the embodiment, the third notches 2031 are the same size as the first notches 2011 provided on the first support unit 201, and the third notches 2031 and the fourth notches 2032 of the third support unit 203 are spliced with the first notches 2011 of the first support unit 201, so that stable splicing can be realized. The length of the fourth notches 2032 is smaller than that of the first notches 2011, and the fourth notches 2032 of the third support unit 203 are spliced with the first notches 2011 of the first support unit 201, so that close splicing can be realized. The length of the fifth notches 2033 is greater than the thickness of the second support unit 202, the fifth notches 2033 are spliced with the second support unit 202, span the thickness of the second support unit 202, and can further reinforce the second support unit 202.

[0060] Please continue to refer to Figures 3 to 5 , the thickness of the first support unit 201 is smaller than the thickness of the second support unit 202, and the thickness of the third support unit 203 is the same as the thickness of the first support unit 201.

[0061] Exemplarily, the thickness of the first support unit 201 is 20mm, the thickness of the second support unit 202 is 70mm, and the thickness of the third support unit 203 is 20mm.

[0062] In the embodiment, the thickness of the first support unit 201 and the thickness of the second support unit 202 can form the thickness of the support structure, and the thickness of the second support unit 202 is greater than that of the first support unit 201 and the second support unit 202, so as to facilitate the fixation of the noise reduction and sound absorption plate 10.

[0063] In some embodiments, the utility model also provides a transformer, which comprises an oil tank, a body assembly and the above-mentioned noise reduction and sound absorption plate 10, and the noise reduction and sound absorption plate 10 is arranged between the oil tank and the body assembly.

[0064] The noise reduction sound absorption plate 10 is arranged between the oil tank and the body assembly of the transformer, and the noise reduction sound absorption plate 10 comprises a support structure and a microporous plate 100 arranged on both sides of the support structure. By arranging the microporous plate 100 on both sides of the support structure and uniformly distributing a plurality of sound absorption holes 101 on the microporous plate 100, the sound absorption capacity can be improved, and the noise generated by the transformer can be effectively absorbed. The uniform arrangement of the sound absorption holes 101 of the microporous plate 100 can reduce the resonance phenomenon of the plate itself and reduce the amplification effect of the transformer noise. The support structure comprises a first support unit 201, a second support unit 202 and a third support unit 203 which are spliced with each other, so that the microporous plate 100 can be fixed and supported, the overall strength of the noise reduction sound absorption plate 10 can be improved, deformation or fracture is not easy to occur, the stability and reliability of the plate are ensured, the service life of the noise reduction sound absorption plate 10 is prolonged, and the stability of the noise reduction function is ensured.

[0065] Please refer to Figure 6 , Figure 6 A schematic view of the fixing structure of the transformer in an embodiment of the utility model is shown, the transformer comprises a fixing structure, the fixing structure comprises a first pad 301, a second pad 302 and a bolt 303, the first pad 301 and the second pad 302 are arranged on both sides of the noise reduction sound absorption plate 10 respectively, a second positioning hole 3011 is formed in the first pad 301, a third positioning hole 3021 is formed in the second pad 302, and the bolt passes through the second positioning hole 3011, the first positioning hole 2022 and the third positioning hole 3021 in sequence to fix the noise reduction sound absorption plate 10 on the tank wall of the oil tank.

[0066] Optionally, the fixing structure refers to a structure for fixing the noise reduction sound absorption plate 10. The fixing structure is used for fixing the noise reduction sound absorption plate 10 on the tank wall of the transformer oil tank. In order to ensure that the noise reduction sound absorption plate 10 maintains a certain distance from the tank wall, the fixing structure can be provided with the second pad 302 on the side of the noise reduction sound absorption plate 10 close to the tank wall. The distance of the noise reduction sound absorption plate 10 to the tank wall can be controlled by changing the thickness of the second pad 302. In order to strengthen the stability between the bolt and the noise reduction sound absorption plate 10, the fixing structure is provided with the first pad 301 on the side of the noise reduction sound absorption plate 10 away from the tank wall.

[0067] A second positioning hole 3011 is formed in the first pad 301, a third positioning hole 3021 is formed in the second pad 302, and a first positioning hole 2022 is further arranged on the second support unit 202 of the noise reduction sound absorption plate 10. The sizes of the first positioning hole 2022, the second positioning hole 3011 and the third positioning hole 3021 can be the same. The bolt passes through the second positioning hole 3011, the first positioning hole 2022 and the third positioning hole 3021 in sequence to fix the noise reduction sound absorption plate 10 on the tank wall of the oil tank.

[0068] Optionally, the first pad 301 is provided with a second positioning hole 3011 in the center of the pad. The second pad 302 is provided with a third positioning hole 3021 in the center of the pad. The second positioning hole 3011 and the third positioning hole 3021 are both through holes.

[0069] Optionally, the length and width of the first pad 301 can be the same as the thickness of the second support unit 202, and the length and width of the second pad 302 are also the same as the thickness of the second support unit 202. During the fixing of the noise reduction and sound absorption plate 10, the bolt can increase the contact area of the first pad 301 and the second pad 302 with the second support unit 202, and can improve the stability and strength between the bolt and the second support unit 202.

[0070] Exemplarily, please refer to Figure 7 , Figure 7 The first pad 301 of the fixing structure in an embodiment of the utility model is shown in the schematic view, the length of the first pad 301 is 70mm, the width is 70mm, and the thickness is L. The first pad 301 is provided with a through hole with a diameter of 22mm in the thickness direction, that is, the second positioning hole 3011. The distance of the noise reduction and sound insulation plate to the tank wall is controlled by changing the size of L.

[0071] Please refer to Figure 8 , Figure 8 The second pad 302 of the fixing structure in an embodiment of the utility model is shown in the schematic view, the length of the second pad 302 is 70mm, the width is 70mm, and the thickness is 10mm. The second pad 302 is provided with a through hole with a diameter of 22mm in the thickness direction, that is, the third positioning hole 3021.

[0072] In the embodiment, the first pad 301 and the second pad 302 are respectively arranged on both sides of the noise reduction and sound absorption plate 10. The first pad 301 is provided with the second positioning hole 3011, the second pad 302 is provided with the third positioning hole 3021, and the bolt 303 passes through the second positioning hole 3011, the first positioning hole 2022 and the third positioning hole 3021 in sequence, so as to fix the noise reduction and sound absorption plate 10 on the tank wall of the oil tank. The distance between the noise reduction and sound absorption plate 10 and the tank wall can be ensured, and the stability between the bolt 303 and the noise reduction and sound absorption plate 10 is strengthened.

[0073] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the description.

[0074] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A noise-reducing sound-absorbing panel, characterized in that, The noise-reducing and sound-absorbing panel includes: The support structure includes a first support unit, a second support unit, and a third support unit that are spliced ​​together, and microporous plates are installed on both sides of the support structure. A microporous plate, wherein multiple sound-absorbing holes are evenly distributed on the microporous plate for absorbing noise.

2. The noise-reducing and sound-absorbing panel according to claim 1, characterized in that, The sound-absorbing hole is circular in shape.

3. The noise-reducing and sound-absorbing panel according to claim 1, characterized in that, The first support unit, the second support unit, and the third support unit are provided with notches, and the first support unit, the second support unit, and the third support unit are spliced ​​together through the notches.

4. The noise-reducing and sound-absorbing panel according to claim 3, characterized in that, The first support unit has a first notch, and the second support unit has a second notch. The first notch and the second notch are the same size, and the first notch of the first support unit and the second notch of the second support unit are joined together.

5. The noise-reducing and sound-absorbing panel according to claim 4, characterized in that, The third support unit is provided with a third notch, a fourth notch and a fifth notch. The third notch is the same size as the first notch, the fourth notch is shorter than the first notch, and the fifth notch is longer than the thickness of the second support unit. The third and fourth notches of the third support unit are spliced ​​with the first notch of the first support unit, and the fifth notch of the third support unit is spliced ​​with the second support unit.

6. The noise-reducing and sound-absorbing panel according to claim 4, characterized in that, A first positioning hole is provided between the second notches, and the first positioning hole is used to fix the noise reduction and sound absorption plate to the tank wall of the transformer.

7. The noise-reducing and sound-absorbing panel according to claim 1, characterized in that, The thickness of the first support unit is less than the thickness of the second support unit, and the thickness of the third support unit is the same as the thickness of the first support unit.

8. The noise-reducing and sound-absorbing panel according to claim 1, characterized in that, The microporous plate is made of cardboard, and the first support unit, the second support unit, and the third support unit are made of laminated wood.

9. A transformer, characterized in that, The transformer includes an oil tank, a transformer body assembly, and a noise-reducing and sound-absorbing plate as described in any one of claims 1 to 8, wherein the noise-reducing and sound-absorbing plate is disposed between the oil tank and the transformer body assembly.

10. The transformer according to claim 9, characterized in that, The transformer also includes: The fixing structure includes a first pad, a second pad, and a bolt. The first pad and the second pad are respectively disposed on both sides of the noise reduction and sound absorption plate. The first pad has a second positioning hole, and the second pad has a third positioning hole. The bolt passes through the second positioning hole, the first positioning hole on the second support unit, and the third positioning hole in sequence to fix the noise reduction and sound absorption plate to the tank wall of the oil tank.

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