A high sound insulation composite wall for substation

Abstract

The present invention provides a high-sound insulation composite wall for a substation, comprising an inner panel (1), an outer panel (2), a core layer and an edge seal (6), wherein the core layer is fixed between the inner panel (1) and the outer panel (2), the edge seal (6) is on the side of the inner panel (1), the outer panel (2) and the core layer, an air layer (8) is present between the outer panel (2) and the core layer, and the core layer comprises a rock wool-metal plate-rock wool composite layer; the technical solution fully utilizes the sound insulation and noise reduction effect of rock wool and the corrosion resistance and strength of metal plates of different materials, thereby achieving an excellent effect with lower cost and significant noise reduction effect than noise reduction modification, controlling the noise radiation of equipment to the maximum extent within the substation, and solving the problem of excessive noise at the substation boundary.

Description

Technical Field

[0001] The invention relates to a wall, in particular to a high sound insulation composite wall for a transformer substation. Background Art

[0002] With socioeconomic development and the continuous growth of electricity load, the construction of smart grids, with ultra-high voltage power grids as the backbone, is steadily advancing. Modular construction of indoor substations has become a mainstream design trend in power grid infrastructure projects. Unified design depth and construction standards have improved construction efficiency and reduced construction costs. While noise reduction measures have been promoted and applied in some substations with specialized noise environment requirements, there is still a lack of noise reduction technology solutions tailored to modular substation construction. Existing modular substation enclosures primarily utilize walls made of conventional rock wool sandwich panels, which have poor noise control capabilities for power equipment. The design of indoor substation wall structures primarily considers control factors such as production process and mechanical properties, but does not consider the sound insulation performance of the wall structure. In-depth acoustic analysis and research on wall structures has not yet been conducted, leaving a technical gap and a significant shortage of technical reserves for high-sound-insulating modular wall structures. Therefore, developing a high-sound-insulating modular wall structure for substations will facilitate the engineering adaptation of noise reduction materials, form a unified, customized engineering solution, and achieve sustainable and healthy development of the substation noise environment, with significant engineering application value and social benefits.

[0003] Transformer noise is the primary source of noise in indoor substations. Transformer vibration and noise are primarily caused by magnetostriction of the core silicon steel sheets and coil winding vibration caused by load current. The noise frequency range is primarily concentrated in the mid- and low-frequency range, with a small amount of high-frequency noise also present. Based on the characteristics of these noise sources, a high-sound-insulating modular wall structure design for indoor substations has been developed. This design is more cost-effective and significantly reduces noise compared to noise reduction retrofits. This design, which controls equipment noise radiation within the substation, is a fundamental solution to excessive noise levels at the substation boundary. Summary of the Invention

[0004] In order to solve the problem that the wall structure of a modular indoor substation is mainly composed of ordinary rock wool sandwich panels and other walls, and has limited control ability for power equipment noise, the present invention provides a high-sound insulation composite wall for a substation, comprising an inner panel (1), an outer panel (2), a core layer and an edge seal (6), wherein the core layer is fixed between the inner panel (1) and the outer panel (2), the edge seal (6) is on the side of the inner panel (1), the outer panel (2) and the core layer, an air layer (8) is present between the outer panel (2) and the core layer, and the core layer comprises a rock wool-metal plate-rock wool composite layer.

[0005] Preferably, the inner panel (1) is made of an aluminum-zinc-coated steel plate with a thickness of 0.6-0.8 mm.

[0006] Preferably, the outer panel (2) uses an aluminum-magnesium-manganese plate with a thickness of 0.8-1.0 mm.

[0007] Preferably, the thickness of the air layer (8) is 20-30 mm.

[0008] Preferably, the core layer comprises a middle core layer (4), an inner core layer (3) and an outer core layer (5), wherein the inner core layer is between the air layer (8) and the middle core layer (4) and is fixedly connected to the middle core layer (4), and the outer core layer (5) is fixed between the middle core layer (4) and the outer panel (2).

[0009] Preferably, a plurality of light steel keels (7) are installed between the outer panel (2) and the core layer (4), and the outer panel (2) and the core layer (4) are connected and fixed via the light steel keels (7).

[0010] Preferably, the inner core layer (3) and the outer core layer (5) are made of a material having a thickness of 50-60 mm and a bulk density of 120-160 kg / m 3 rock wool board.

[0011] Preferably, the core layer (4) is made of an aluminum-zinc-coated steel plate with a thickness of 2-2.5 mm.

[0012] Preferably, the inner panel (1) and the core layer, the middle core layer (4) and the inner core layer (3) and the outer core layer (5) are bonded with adhesive.

[0013] Preferably, the light steel keel (7) is a U-shaped light steel keel or a Z-shaped light steel keel.

[0014] Preferably, the edge sealing (6) uses polyurethane foam.

[0015] Preferably, the edge sealing (6) uses a plug-in hidden nail structure.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention provides a high-sound insulation composite wall for a substation, comprising an inner panel (1), an outer panel (2), a core layer and an edge seal (6), wherein the core layer is fixed between the inner panel (1) and the outer panel (2), the edge seal (6) is on the side of the inner panel (1), the outer panel (2) and the core layer, an air layer (8) is present between the outer panel (2) and the core layer, and the core layer comprises a rock wool-metal plate-rock wool composite layer; the sound insulation and noise reduction effect of the rock wool is fully utilized, and the corrosion resistance and strength of the metal plates of different materials are fully utilized, thereby achieving an excellent effect with lower cost and more significant noise reduction effect than the noise reduction modification, and controlling the noise radiation of the equipment to the maximum extent within the substation, thereby solving the problem of excessive noise at the substation boundary;

[0018] 2. The present invention provides a high-sound insulation composite wall for substations, which has good stability, safety and sound insulation effect, can significantly reduce the noise radiated from the noise equipment inside the substation to the factory boundary, and has the advantages of high mechanical strength, good mechanical properties, good thermal insulation performance, good chemical stability, and fire resistance. Its manufacturing process is simple, safe and reliable, with significant direct and indirect benefits, and optimizes the application plan of indoor substation wall structure engineering, realizing the unity of economic benefits and environmental benefits of indoor substation noise reduction technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view of a high sound insulation composite wall for a substation according to the present invention;

[0020] Figure 2 The present invention provides a 1 / 3 octave sound insulation characteristic curve of a high sound insulation composite wall for a transformer substation within the range of 100 Hz to 5000 Hz. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] Example 1:

[0023] like Figure 1As shown in the cross-sectional view of the composite wall of the present invention, a high sound insulation composite wall for a substation provided by the present invention includes an inner panel 1, an outer panel 2, a core layer and an edge seal 6. The core layer is fixed between the inner panel 1 and the outer panel 2. The inner panel 1, the outer panel 2 and the core layer are all rectangular. The edge seal 6 is on the side of the inner panel 1, the outer panel 2 and the core layer. An air layer 8 is between the outer panel 2 and the core layer. The core layer includes a rock wool-metal plate-rock wool composite layer.

[0024] The use of the core material in the form of the rock wool-metal plate-rock wool composite layer increases the surface density of the sandwich panel, enhances the overall rigidity of the sandwich panel structure, and improves its sound insulation performance against low-frequency noise. At the same time, the sandwich panel has good thermal insulation performance, fire resistance, moisture resistance, and corrosion resistance, that is, its sound insulation performance is significantly improved while ensuring safety.

[0025] The materials and dimensions of the wall are shown in Table 1:

[0026] Table 1 Materials and dimensions of various parts of a high-sound insulation composite wall for a substation

[0027]

[0028]

[0029] The 1 / 3 octave sound insulation characteristic curve of the wall in the range of 100Hz-5000Hz is as follows Figure 2 The sound insulation is shown in Table 2:

[0030] Table 2 Sound insulation of a high-sound insulation composite wall for substation in the 1 / 3 octave band within the range of 100Hz-5000Hz

[0031] Frequency f / Hz Sound insulation R / dB Frequency f / Hz Sound insulation R / dB 100 15.2 800 72.1 125 18.3 1000 74.2 160 26.1 1250 76.1 200 35.1 1600 77.9 250 42.9 2000 79.7 315 50.9 2500 81.4 400 58.7 3150 77.2 500 65.4 4000 76.0 630 69.7 5000 77.6 <![CDATA[R w ]]> 46

[0032] As shown in Table 2, the high-sound insulation composite wall for a substation provided by the present invention can achieve a weighted sound insulation of 46 dB in the 1 / 3 octave band within the range of 100 Hz to 5000 Hz, which is about 10 dB higher than the weighted sound insulation of a general metal-faced sandwich panel.

[0033] The inner panel 1 uses an aluminum-zinc-coated steel plate with a thickness of 0.6 mm; the aluminum-zinc-coated steel plate has good corrosion resistance and high temperature resistance, especially it has a large rigidity and surface density, which is conducive to improving the sound insulation of the composite wall, and is not easy to deform when glued with the core material of rock wool-steel plate-rock wool.

[0034] The outer panel 2 is constructed of 0.8mm thick aluminum-magnesium-manganese plate. Compared to galvanized steel, aluminum-magnesium-manganese plate offers superior corrosion resistance, typically lasting over 50 years. Indoor substations have high aesthetic requirements, and the excellent durability of aluminum-magnesium-manganese plate meets these requirements. From a sound insulation perspective, the use of different materials for the upper and lower metal surfaces helps stagger the mating frequencies on both sides of the composite panel, reducing the mating effect and improving the sound insulation performance of the composite structure.

[0035] The thickness of the air layer 8 is 20-30 mm.

[0036] The core layer includes a middle core layer 4, an inner core layer 3 and an outer core layer 5. The inner core layer is between the air layer 8 and the middle core layer 4 and is fixedly connected to the middle core layer 4. The outer core layer 5 is fixed between the middle core layer 4 and the outer panel 2.

[0037] A plurality of light steel keels 7 are installed between the outer panel 2 and the core layer 4 , and the outer panel 2 and the core layer 4 are connected and fixed by the light steel keels 7 .

[0038] The inner core layer 3 and the outer core layer 5 have a thickness of 50 mm and a bulk density of 120 kg / m 3 Rock wool board; as a porous sound-absorbing material, rock wool is filled between rigid panels, increasing the wall's damping. This not only eliminates standing wave resonance between the panels, but also increases sound insulation at the matching frequencies, thereby improving the wall's sound insulation performance. Furthermore, due to its low thermal conductivity, rock wool board offers excellent thermal insulation properties. It is also chemically stable, resistant to decay, and fireproof.

[0039] The core layer 4, constructed of 2mm thick galvanized steel sheet, significantly enhances the core's rigidity and surface density, significantly improving the sound insulation performance of the sandwich panel wall. Furthermore, as the central layer of the composite sandwich panel, the galvanized steel sheet provides support, preventing deformation and warping, making it ideal for substation enclosures.

[0040] The panel and the core layer, and the middle core layer and the side core layers are bonded with adhesive, so that the production process is simple, safe, reliable and low in cost.

[0041] The light steel keel 7 is a U-shaped light steel keel or a Z-shaped light steel keel with a low elastic modulus.

[0042] The edge banding 6 is made of polyurethane foam, and one set of opposite edges among the side edges of the inner panel 1, the outer panel 2 and the core layer is wrapped with the edge banding 6, and the other set of opposite edges is wrapped with steel plates, making the wall more beautiful.

[0043] The edge sealing 6 uses a plug-in hidden nail structure, which can achieve quick and convenient installation of the modular wall panels, and has significant direct and indirect benefits.

[0044] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A high sound insulation composite wall for a substation, comprising an inner panel (1), an outer panel (2), a core layer and an edge seal (6), characterized in that: The core layer is fixed between the inner panel (1) and the outer panel (2), the edge sealing (6) is on the side of the inner panel (1), the outer panel (2) and the core layer, an air layer (8) is present between the outer panel (2) and the core layer, and the core layer comprises a rock wool-metal plate-rock wool composite layer; The inner panel (1) is made of 0.6-0.8 mm thick galvanized steel sheet; The outer panel (2) is made of an aluminum-magnesium-manganese plate with a thickness of 0.8-1.0 mm; The core layer comprises a middle core layer (4), an inner core layer (3) and an outer core layer (5); the inner core layer is between the air layer (8) and the middle core layer (4) and is fixedly connected to the middle core layer (4); and the outer core layer (5) is fixed between the middle core layer (4) and the outer panel (2); A plurality of light steel keels (7) are installed between the outer panel (2) and the core layer (4), and the outer panel (2) and the core layer (4) are connected and fixed via the light steel keels (7); The light steel keel (7) adopts a U-shaped light steel keel or a Z-shaped light steel keel.

2. A high sound insulation composite wall for a substation according to claim 1, characterized in that: The thickness of the air layer (8) is 20-30 mm.

3. The high sound insulation composite wall for a substation according to claim 1, characterized in that: The inner core layer (3) and the outer core layer (5) have a thickness of 50-60 mm and a bulk density of 120-160 kg / m 3 rock wool board.

4. The high sound insulation composite wall for a substation according to claim 1, characterized in that: The core layer (4) is made of an aluminum-zinc-coated steel plate with a thickness of 2-2.5 mm.

5. A composite wall according to claim 1, characterized in that: The inner panel (1) and the core layer, the middle core layer (4) and the inner core layer (3) and the outer core layer (5) are bonded with adhesive.

6. The high sound insulation composite wall for a substation according to claim 1, characterized in that: The edge sealing (6) uses polyurethane foam.

7. The high sound insulation composite wall for a substation according to claim 5, characterized in that: The edge sealing (6) uses a plug-in hidden nail structure.

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