A transformer with noise reduction function

Abstract

The utility model relates to transformer technical field, concretely is: a transformer with noise reduction function, including base, the base installs transformer body, the base is detachably connected with the noise reduction board, the noise reduction board from outside to inside gradually by outer layer protection layer, first sound insulation layer, first damping layer, sound absorption layer, second damping layer, second sound insulation layer and inner layer protection layer are composed, in the utility model, through outer layer protection layer, first sound insulation layer, first damping layer, sound absorption layer, second damping layer, second sound insulation layer and inner layer protection layer setting, the effective control to transformer noise has been realized.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a transformer with noise reduction function. Background Technology

[0002] In the daily operation of a power system, transformers, as indispensable core power equipment, play a crucial and decisive role in ensuring the reliability of the overall power supply through their continuous and stable operation. However, in reality, transformers inevitably generate a large amount of continuous noise during long-term operation. This noise not only seriously pollutes the natural and living environment around the equipment, directly interfering with the normal life rhythm of nearby residents and the daily work efficiency of company employees, but may also subtly have many adverse effects on the operational stability of the transformer itself and the performance of other related power equipment in the vicinity, thus creating potential operational hazards.

[0003] Currently, existing noise reduction measures for transformers are diverse, covering various aspects such as structural optimization and material improvement. However, many protective noise reduction panels employ relatively simple structural designs, mostly single-layer panels, with only a few using multi-layer structures. Due to these structural limitations, their actual noise reduction effect is relatively limited, failing to meet increasingly stringent standards and requirements for noise pollution control and thus unable to effectively solve the various problems caused by transformer noise. Utility Model Content

[0004] To address the technical problem that existing transformers cannot improve noise reduction performance, this utility model provides a transformer with noise reduction function.

[0005] The technical solution adopted by this utility model is: a transformer with noise reduction function, including a base, on which a transformer body is installed, and a noise reduction plate is detachably connected to the base. A rotating shaft is fixedly connected to the outside of the noise reduction plate, and the rotating shaft is rotatably connected to the base. A positioning screw is threadedly connected to the outside of the noise reduction plate, and a threaded hole is provided on the base at the position corresponding to the positioning screw. The noise reduction plate is composed of an outer protective layer, a first sound insulation layer, a first damping layer, a sound absorption layer, a second damping layer, a second sound insulation layer, and an inner protective layer from the outside to the inside.

[0006] In one embodiment, the outer protective layer is a hot-dip galvanized steel sheet with a thickness of 2-3 mm.

[0007] In one embodiment, the first sound insulation layer is a high-density polyethylene board with a thickness of 5-8 mm.

[0008] In one embodiment, both the first damping layer and the second damping layer are made of butyl rubber damping material with a thickness of 1-2 mm.

[0009] In one embodiment, the sound-absorbing layer is a centrifugal glass wool board with a thickness of 20-30mm.

[0010] In one embodiment, the second sound insulation layer is an aluminum-plastic composite panel with a thickness of 5-8 mm. In one embodiment, the inner protective layer is a stainless steel plate with a thickness of 1.5-2.5 mm.

[0011] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model achieves effective control of transformer noise through the arrangement of an outer protective layer, a first sound insulation layer, a first damping layer, a sound-absorbing layer, a second damping layer, a second sound insulation layer, and an inner protective layer. The outer and inner protective layers ensure the mechanical strength and weather resistance of the protective noise reduction plate; the first and second sound insulation layers respectively provide initial and secondary sound wave blocking; the first and second damping layers effectively suppress the vibration of each layer structure, reducing secondary noise; and the sound-absorbing layer absorbs sound wave energy, significantly reducing noise. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the noise reduction plate in this utility model; Figure 3 This is a schematic diagram of the transformer body in this utility model; Figure 4 This is a schematic diagram of the layered structure of the noise reduction plate in this utility model.

[0013] The following are marked in the diagram: 1. Base; 2. Transformer body; 3. Noise reduction plate; 4. Shaft; 5. Positioning screw; 6. Threaded hole; 7. Outer protective layer; 8. First sound insulation layer; 9. First damping layer; 10. Sound absorption layer; 11. Second damping layer; 12. Second sound insulation layer; 13. Inner protective layer. Detailed Implementation

[0014] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", 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.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] The following is in conjunction with the appendix Figure 1-4 The present invention will be further described below.

[0017] To address the problems existing in the background technology, this application proposes the following technical solution: a transformer with noise reduction function, including a base 1, a transformer body 2 mounted on the base 1, a noise reduction plate 3 detachably connected to the base 1, a rotating shaft 4 fixedly connected to the outside of the noise reduction plate 3, the rotating shaft 4 being rotatably connected to the base 1, a positioning screw 5 being threadedly connected to the outside of the noise reduction plate 3, and a threaded hole 6 being provided on the base 1 at the position corresponding to the positioning screw 5. The noise reduction plate 3 is rotatably mounted on the base 1, facilitating maintenance of the transformer body 2, and the connection between the positioning screw 5 and the threaded hole 6 facilitates the fixation of the noise reduction plate 3. The noise reduction plate 3 is composed of an outer protective layer 7, a first sound insulation layer 8, a first damping layer 9, a sound absorption layer 10, a second damping layer 11, a second sound insulation layer 12, and an inner protective layer 13 from the outside to the inside.

[0018] The outer protective layer 7 has a thickness of 2.0-3.0 mm, the first sound insulation layer 8 has a thickness of 5.0-8.0 mm, the first damping layer 9 has a thickness of 1.0-2.0 mm, the sound absorption layer 10 has a thickness of 20.0-30.0 mm, the second damping layer 11 has a thickness of 1.0-2.0 mm, the second sound insulation layer 12 has a thickness of 5.0-8.0 mm, and the inner protective layer 13 has a thickness of 1.5-2.5 mm. Material selection for outer protective layer 7: The outer protective layer 7 is made of hot-dip galvanized steel sheet. Hot-dip galvanized steel sheet has excellent corrosion resistance, wear resistance and mechanical strength, which can effectively protect the internal structure from external environmental erosion, such as rainwater, dust, ultraviolet rays, etc., and extend the service life of the protective noise reduction plate 3.

[0019] Production Method: Hot-dip galvanized steel sheets are produced using a continuous hot-dip galvanizing process. First, the steel sheets undergo surface treatments such as degreasing and pickling to remove surface oil and oxide scale. Then, the steel sheets are immersed in molten zinc to form a uniform zinc coating on the surface. Finally, cooling and passivation processes are performed to improve the corrosion resistance and adhesion of the zinc coating.

[0020] Structural function: The outer protective layer 7, as the outermost layer of the protective noise reduction board 3, mainly serves to provide mechanical protection and weather resistance, preventing physical damage to the internal structure and environmental factors. At the same time, its smooth surface also helps to reduce sound wave reflection, creating favorable working conditions for the subsequent sound insulation and sound absorption layers 10.

[0021] Material selection for the first sound insulation layer 8: The first sound insulation layer 8 is made of high-density polyethylene (HDPE) board. High-density polyethylene has high density and good sound insulation performance, which can effectively block external sound waves from entering the interior. In addition, HDPE board also has the characteristics of being lightweight, having good chemical stability, and excellent processing performance.

[0022] Production Method: HDPE sheets are produced using an extrusion molding process. HDPE resin granules are added to an extruder, heated, melted, and mixed evenly. The mixture is then extruded through a die into sheet shape. After cooling, shaping, and traction cutting, HDPE sheets of the required thickness and size are obtained. During production, appropriate additives, such as antioxidants and UV absorbers, can be added as needed to improve the sheet's performance.

[0023] Structural function: The first sound insulation layer 8 is one of the main sound barriers of the protective noise reduction board 3. It can initially block the mid-to-high frequency noise generated by the transformer and reduce the propagation of sound waves inward. Its high density characteristics cause the energy of sound waves to be greatly attenuated during propagation.

[0024] Material selection for the first damping layer 9: Butyl rubber is selected as the damping material for the first damping layer 9. Butyl rubber has excellent damping properties, which can convert the mechanical energy of sound waves into heat energy and dissipate it, thereby effectively suppressing vibration and reducing noise. At the same time, butyl rubber also has good oil resistance, aging resistance and sealing properties.

[0025] Production Method: Butyl rubber damping materials are produced using a compounding and calendering process. First, raw butyl rubber is mixed with carbon black, plasticizers, vulcanizing agents, and other additives in an internal mixer to obtain a uniform rubber compound. Then, the rubber compound is placed in a calender and calendered into a sheet of the required thickness. Finally, it undergoes vulcanization treatment to improve the elasticity and damping performance of the sheet.

[0026] Structural function: The first damping layer 9 is located between the outer protective layer 7 and the first sound insulation layer 8. Its main function is to suppress the vibration of the outer protective layer 7 and the first sound insulation layer 8. When sound waves act on the outer protective layer 7 and the first sound insulation layer 8, they will vibrate. The first damping layer 9 can consume the vibration energy through its own damping effect, reduce the transmission of vibration to the internal structure, and thus improve the overall noise reduction effect.

[0027] Material selection for sound-absorbing layer 10: Sound-absorbing layer 10 uses centrifugal glass wool board. Centrifugal glass wool has excellent sound absorption performance. Its interior contains numerous tiny pores and air channels. When sound waves enter, they cause vibration and friction of air molecules, converting sound wave energy into heat energy, which is then absorbed. Furthermore, centrifugal glass wool also has advantages such as light weight, good thermal insulation performance, and non-combustibility.

[0028] Production Method: The production of centrifugal glass wool boards mainly includes melting, centrifugal molding, and curing processes. First, raw materials such as quartz sand, feldspar, and soda ash are mixed in a certain proportion and then put into a furnace to melt into glass liquid. Then, the glass liquid is drawn into fine glass fibers by high-speed rotation of a centrifuge. Next, the glass fibers are collected, an appropriate amount of binder is added, and after molding and curing, centrifugal glass wool boards are produced.

[0029] Structural function: The sound-absorbing layer 10 is the main sound-absorbing component in the protective noise reduction board 3, which can effectively absorb the residual sound waves after the initial blocking by the first sound insulation layer 8. Its numerous pores provide ample space for sound wave absorption, which can significantly reduce the energy of the sound waves, especially showing good absorption effect for mid-to-high frequency noise.

[0030] Material selection for the second damping layer 11: The second damping layer 11 is also made of butyl rubber damping material, the same as the first damping layer 9, to ensure the consistency and stability of damping performance.

[0031] Production method: The same as the production method of the first damping layer 9, using a compounding and calendering process.

[0032] Structural function: The second damping layer 11 is located between the sound-absorbing layer 10 and the second sound-insulating layer 12. Its function is to further suppress the vibration of the sound-absorbing layer 10 and the second sound-insulating layer 12. The sound wave energy absorbed by the sound-absorbing layer 10 has been greatly reduced, but it may still cause vibration of the sound-absorbing layer 10 and the second sound-insulating layer 12. The second damping layer 11 can dissipate this vibration energy through damping, prevent the vibration from being transmitted to the second sound-insulating layer 12 and the internal structure, and further improve the noise reduction effect.

[0033] Material selection for the second sound insulation layer 12: The second sound insulation layer 12 uses aluminum-plastic composite panels. Aluminum-plastic composite panels are composed of aluminum sheets and a plastic core layer, possessing high sound insulation performance, mechanical strength, and weather resistance. The aluminum sheets offer good rigidity and sound insulation, while the plastic core layer reduces the weight of the panel and improves its thermal insulation performance.

[0034] Production Method: Aluminum-plastic composite panels are produced using a composite molding process. First, the aluminum sheet undergoes surface treatment, such as degreasing and anodizing. Then, the treated aluminum sheet is bonded to a plastic core layer (usually polyethylene or polypropylene) using adhesives in a laminating machine. Finally, after cooling and cutting, the aluminum-plastic composite panel is obtained. During production, parameters such as lamination temperature and pressure must be strictly controlled to ensure composite quality.

[0035] Structural function: The second sound insulation layer 12, as the inner sound barrier of the protective noise reduction panel 3, can further block the residual sound waves after absorption by the sound-absorbing layer 10 and vibration damping by the second damping layer 11, thereby further reducing the propagation of sound waves inward. Its composite structure allows it to have good sound insulation performance while also being lightweight, which helps to reduce the overall weight of the protective noise reduction panel 3.

[0036] Material selection for inner protective layer 13: Stainless steel plate is selected for inner protective layer 13. Stainless steel plate has excellent corrosion resistance, wear resistance and hygiene properties, which can protect the internal structure from corrosion by factors such as oil and moisture that may exist inside the transformer, and it is also easy to clean and maintain.

[0037] Production methods: Stainless steel sheets are produced using either hot rolling or cold rolling processes. Hot rolling involves heating a steel billet to a certain temperature and then rolling it to obtain a thicker stainless steel sheet. Cold rolling, on the other hand, involves rolling a hot-rolled steel sheet at room temperature to obtain a thinner stainless steel sheet with a better surface quality. The appropriate production process and stainless steel grade are selected based on actual requirements.

[0038] Structural function: The inner protective layer 13, as the innermost layer of the protective noise reduction plate 3, mainly serves to protect the internal structure from the influence of the transformer's internal environment. It prevents oil, water vapor, and other contaminants from entering the internal structure of the protective noise reduction plate 3, ensuring the performance stability of each layer, and also provides a certain degree of mechanical support for the protective noise reduction plate 3.

[0039] The outer protective layer 7 (hot-dip galvanized steel sheet) and the first sound insulation layer 8 (HDPE board) are bonded together using polyurethane adhesive. The polyurethane adhesive possesses excellent bonding strength, water resistance, and weather resistance, ensuring a tight bond between the two layers. During the bonding process, the surfaces of the outer protective layer 7 and the first sound insulation layer 8 are first cleaned to remove oil, dust, and other impurities. Then, the polyurethane adhesive is evenly applied to both surfaces, with a thickness controlled at 0.2-0.3 mm. Finally, the two layers are aligned and bonded together, applying a certain pressure (usually 0.5-1.0 MPa) and maintaining the pressure until the adhesive is fully cured (curing time varies depending on the adhesive type, generally 24-48 hours).

[0040] The first sound insulation layer 8 (HDPE board) and the first damping layer 9 (butyl rubber damping material) are connected by hot-press bonding. The butyl rubber damping material has a certain degree of adhesion under heating conditions, allowing the two layers to bond tightly through hot pressing. The specific operation process is as follows: clean the surfaces of the first sound insulation layer 8 and the first damping layer 9; place the first damping layer 9 on the surface of the first sound insulation layer 8, aligning it; then place them in a hot press and hot-press for 30-60 seconds at a temperature of 80-100℃ and a pressure of 1.0-1.5MPa; finally, remove and cool to ensure a firm bond between the two layers.

[0041] The first damping layer 9 (butyl rubber damping material) and the sound-absorbing layer 10 (centrifugal glass wool board) are connected by spot bonding. Because the centrifugal glass wool board is relatively soft and has a porous structure, spot bonding avoids excessive adhesive clogging the pores and affecting sound absorption performance. Specifically, a dotted pattern of polyurethane adhesive is evenly applied to the surface of the first damping layer 9, with a dot diameter of 5-10 mm and a dot spacing of 50-100 mm. Then, the sound-absorbing layer 10 is aligned and placed on the surface of the first damping layer 9, and gently pressed to firmly bond the sound-absorbing layer 10 to the first damping layer 9 using the adhesive dots.

[0042] The connection method between the sound-absorbing layer 10 (centrifugal glass wool board) and the second damping layer 11 (butyl rubber damping material) is the same as that between the first damping layer 9 and the sound-absorbing layer 10, using a dot-bonding method. A dotted layer of polyurethane adhesive is evenly applied to the surface of the sound-absorbing layer 10, and then the second damping layer 11 is aligned and pressed together to ensure a firm connection without affecting the sound absorption performance of the sound-absorbing layer 10.

[0043] The second damping layer 11 (butyl rubber damping material) and the second sound insulation layer 12 (aluminum-plastic composite panel) are connected by hot-pressing, the same as the connection method between the first sound insulation layer 8 and the first damping layer 9. After cleaning the surfaces of the second damping layer 11 and the second sound insulation layer 12, the second damping layer 11 is placed on the surface of the second sound insulation layer 12 and placed in a hot press to be hot-pressed together under certain temperature and pressure to ensure a tight connection between the two layers.

[0044] The second sound insulation layer 12 (aluminum-plastic composite panel) and the inner protective layer 13 (stainless steel plate) are connected by rivets and bonded with polyurethane adhesive. First, holes are pre-drilled at corresponding positions on the second sound insulation layer 12 and the inner protective layer 13. Then, stainless steel rivets are used for riveting, with a rivet spacing of 100-150mm to ensure the mechanical strength of the connection. Simultaneously, polyurethane adhesive is applied to the gap between the two layers to enhance the sealing of the connection and prevent sound waves from leaking out.

[0045] By combining the above various connection methods, a tight bond between the layered structures can be ensured, reducing interlayer gaps and sound wave leakage, and improving the overall sound insulation and noise reduction performance of the protective noise reduction board 3. At the same time, these connection methods are simple and reliable to operate, facilitating industrial production.

[0046] When the noise waves generated by the transformer body 2 propagate to the protective noise reduction plate 3, they first come into contact with the outer protective layer 7. The hot-dip galvanized steel plate of the outer protective layer 7 has a smooth surface, which can reflect part of the sound waves and reduce the energy of the sound waves directly entering the interior of the plate. At the same time, the outer protective layer 7 has high mechanical strength and can withstand the impact of sound waves, protecting the internal structure from damage.

[0047] Some of the sound waves reflected by the outer protective layer 7 will pass through the outer protective layer 7 and enter the first sound insulation layer 8. The high-density polyethylene board of the first sound insulation layer 8 has high density and sound insulation performance. When the sound waves pass through the first sound insulation layer 8, the sound wave energy will be greatly attenuated due to the change in the density of the medium. Most of the mid-to-high frequency noise is initially blocked here.

[0048] As sound waves pass through the first sound insulation layer 8, they cause vibrations in both the first sound insulation layer 8 and the outer protective layer 7. At this time, the first damping layer 9 located between the two comes into play. The butyl rubber damping material of the first damping layer 9 has good damping performance, which can convert the mechanical energy of the vibration into heat energy and dissipate it, effectively suppressing the propagation of vibration and reducing secondary noise caused by vibration.

[0049] The residual sound waves, after being treated by the first sound insulation layer 8 and the first damping layer 9, enter the sound absorption layer 10. The centrifugal glass wool board of the sound absorption layer 10 contains numerous tiny pores and air channels. When sound waves enter these pores, they cause the air molecules to vibrate and rub against each other. Simultaneously, the glass fibers also vibrate, converting the sound wave energy into heat energy, which is then absorbed. Especially for mid-to-high frequency noise, the sound absorption layer 10 can play a significant absorption role, further reducing the energy of the sound waves.

[0050] During the process of absorbing sound wave energy, the sound-absorbing layer 10 will also generate a certain amount of vibration. The second damping layer 11, located between the sound-absorbing layer 10 and the second sound insulation layer 12, can suppress this vibration, consume the vibration energy through damping, prevent the vibration from being transmitted to the second sound insulation layer 12, and avoid generating new noise radiation.

[0051] After being absorbed by the sound-absorbing layer 10 and damped by the second damping layer 11, the sound wave energy is already very weak, but a small amount of sound waves will still continue to propagate to the second sound insulation layer 12. The aluminum-plastic composite panel of the second sound insulation layer 12 further blocks the sound waves, utilizing the rigidity of its aluminum plate and the sound insulation properties of its plastic core layer to further attenuate the sound wave energy and prevent residual sound waves from passing through the protective noise reduction panel 3 and affecting the internal environment.

[0052] Finally, the stainless steel plate of the inner protective layer 13 plays a protective role, preventing oil stains, water vapor and other substances inside the transformer from entering the interior of the protective noise reduction plate 3, ensuring the performance stability of each layer structure, and also providing final blocking and reflection of the very small amount of sound waves that may pass through the second sound insulation layer 12.

[0053] In summary, through the initial reflection of the outer protective layer 7, the initial blocking of the first sound insulation layer 8, the vibration reduction of the first damping layer 9, the energy absorption of the sound absorption layer 10, the further vibration reduction of the second damping layer 11, the further blocking of the second sound insulation layer 12, and the final protection of the inner protective layer 13, a complete noise control system is formed. The synergistic effect of each layer can effectively block and absorb the noise generated by the transformer body 2, especially the mid-to-high frequency noise, thereby achieving a good noise reduction effect.

[0054] Furthermore, by using lightweight materials such as high-density polyethylene and centrifugal glass wool, energy consumption during transportation and installation is reduced compared to traditional heavy sound insulation materials, thus lowering energy consumption during the construction phase. The layered structure design, through the synergistic effect of each layer, improves noise reduction efficiency and reduces the energy consumption of additional noise reduction equipment required due to excessive noise levels. The optimized connection method combines adhesives and mechanical connections to reduce material waste and rework losses. The appropriate combination of damping and sound insulation layers reduces the transmission of sound wave vibration energy, minimizing additional energy consumption caused by equipment resonance and thus saving energy. In long-term use, weather-resistant materials such as hot-dip galvanized steel sheets and stainless steel extend their service life, reduce replacement frequency, reduce energy consumption in material production and recycling, achieve energy-saving benefits throughout the entire life cycle, and meet the needs of green and low-carbon energy development.

[0055] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0056] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A transformer with noise reduction function, characterized in that, The system includes a base (1), on which a transformer body (2) is mounted. A noise reduction plate (3) is detachably connected to the base (1). A rotating shaft (4) is fixedly connected to the outside of the noise reduction plate (3). The rotating shaft (4) is rotatably connected to the base (1). A positioning screw (5) is threadedly connected to the outside of the noise reduction plate (3). A threaded hole (6) is provided at the position of the positioning screw (5) on the base (1). The noise reduction plate (3) consists of an outer protective layer (7), a first sound insulation layer (8), a first damping layer (9), a sound absorption layer (10), a second damping layer (11), a second sound insulation layer (12), and an inner protective layer (13) from the outside to the inside.

2. A transformer with noise reduction function according to claim 1, characterized in that, The outer protective layer (7) is a hot-dip galvanized steel sheet with a thickness of 2-3 mm.

3. A transformer with noise reduction function according to claim 2, characterized in that, The first sound insulation layer (8) is a high-density polyethylene board with a thickness of 5-8 mm.

4. A transformer with noise reduction function according to claim 3, characterized in that, Both the first damping layer (9) and the second damping layer (11) are made of butyl rubber damping material with a thickness of 1-2 mm.

5. A transformer with noise reduction function according to claim 4, characterized in that, The sound-absorbing layer (10) is a centrifugal glass wool board with a thickness of 20-30mm.

6. A transformer with noise reduction function according to claim 5, characterized in that, The second sound insulation layer (12) is an aluminum-plastic composite board with a thickness of 5-8mm.

7. A transformer with noise reduction function according to claim 6, characterized in that, The inner protective layer (13) is a stainless steel plate with a thickness of 1.5-2.5mm.

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