High-performance fireproof noise-reducing soundproof composite board, protective noise-reducing barrier and charging station

Abstract

The application provides a high-performance fireproof noise-reducing soundproof composite board, a protective noise-reducing barrier and a charging station. The high-performance fireproof noise-reducing soundproof composite board comprises a metal plate, a fireproof sound-absorbing piece and a damping piece, a cavity is formed in the metal plate, a sound-absorbing channel is formed in a first side wall of the cavity, the sound-absorbing channel is communicated with the cavity, and the fireproof sound-absorbing piece and the damping piece are sequentially arranged in the cavity. The fireproof sound-absorbing piece is a semi-rigid polyurethane composite board, the damping piece is a modified high-elasticity damping coating, and the damping piece and the fireproof sound-absorbing piece are attached to each other. The high-performance fireproof noise-reducing soundproof composite board has the advantages that the cavity can well block noise, the fireproof sound-absorbing piece can well absorb, damp and insulate noise in the cavity, and the damping piece can damp the metal plate and the fireproof sound-absorbing piece, so that noise emission on the surface of the metal plate is effectively reduced, a better noise reduction effect is achieved, and the high-performance fireproof noise-reducing soundproof composite board is especially suitable for noise reduction of a charging station in a residential area.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging stations, in particular to a high-performance fireproof noise-reducing soundproof composite board, a protective noise-reducing barrier and a charging station. BACKGROUND

[0002] With the increasing demand for new energy electric vehicle charging stations, the demand for charging station installation sites is also increasing. However, due to the characteristics of land planning, layout design, etc., many residential, commercial, and enterprise and institution surrounding areas have become charging station installation sites to provide more convenient charging points for users.

[0003] In actual application, the charging station generates a large amount of heat when working, and if the heat is not dissipated in time, it is easy to cause internal failure of the charging station. In order to ensure the normal operation of the charging station, a heat dissipation fan is usually added to dissipate heat to ensure the normal operation of the charging station.

[0004] However, as the use time of the charging station increases, the heat dissipation fan is prone to aging, and the entry of external dust, resulting in a large noise when the heat dissipation fan is working, which not only seriously affects the customer's use satisfaction, but also affects the life of the surrounding residents, especially for the residents living near the charging station. Therefore, it is necessary and significant to reduce the noise of the charging station.

[0005] Currently, the use of fibrous sound-absorbing materials, lightweight sound-insulating materials and sound-insulating structures are the preferred control measures for noise reduction, such as patent CN216783285U discloses a charging pile operation noise reduction control device, which uses a fiberboard to make a bent sound-absorbing component to achieve the effect of noise reduction.

[0006] However, although the added sound-absorbing component can achieve the effect of noise reduction for the above charging station, the structure of the sound-absorbing component is relatively simple, which makes the noise reduction effect of the traditional charging station poor, and thus cannot be well adapted to the noise reduction of the charging station in residential areas. SUMMARY

[0007] The present application aims to overcome the shortcomings of the prior art and provide a high-performance fireproof noise-reducing soundproof composite board, a protective noise-reducing barrier and a charging station with good noise reduction effect, fireproof performance and high safety.

[0008] The present application is achieved by the following technical solutions:

[0009] The utility model provides a high performance fireproof noise reduction sound insulation composite board, including metal sheet, fireproof sound absorption piece and damping piece, the cavity is formed in the metal sheet, the first side wall of the cavity forms sound absorption channel, and the sound absorption channel is linked with the cavity, and the fireproof sound absorption piece and the damping piece are sequentially arranged in the cavity,

[0010] Among them, the fireproof sound absorption piece is semi -hard polyurethane composite board,

[0011] The damping piece is modified high elasticity damping coating, and the damping piece and the fireproof sound absorption piece mutually affix and abut.

[0012] In one embodiment, the semi -hard polyurethane composite board includes the following mass fraction:

[0013] 3 functionality polyether polyol 30~40 parts;

[0014] 2 functionality polyether polyol 10~15 parts;

[0015] Isocyanate 20~30 parts;

[0016] Liquid flame retardant 11~25 parts;

[0017] Powder flame retardant 3~15 parts;

[0018] Expandable graphite 10~15 parts;

[0019] Catalyst 0.15~0.5 parts;

[0020] Open hole agent 0.5~1.0 parts;

[0021] Foam stabilizer 0.5~1.0 parts;

[0022] Foaming agent 0.5~1.0 parts.

[0023] In one embodiment, the modified high elasticity damping coating includes the following mass fraction:

[0024] Polyurethane prepolymer 50~60 parts;

[0025] Isocyanate 5~10 parts;

[0026] Catalyst 0.1~1 parts;

[0027] Flame retardant 1~10 parts;

[0028] Expandable graphite 5~10 parts;

[0029] Piezoelectric material 5~10 parts;

[0030] The flaky filler is 3-15 parts.

[0031] In one of the embodiments, the fireproof sound-absorbing piece is formed with a plurality of wave-shaped bending portions on the side facing the sound-absorbing channel.

[0032] In one of the embodiments, the fireproof sound-absorbing piece has a density of ≤100 kg / m 3 , a thickness of ≤50 mm, and a foam porosity of 50-70%.

[0033] In one of the embodiments, the metal plate comprises a panel and a bottom shell, the bottom shell is formed with the cavity, the bottom shell is detachably connected with the panel, and the panel is formed with the sound-absorbing channel.

[0034] In one of the embodiments, the fireproof sound-absorbing piece is formed with a plurality of wave-shaped bending portions on the side facing the sound-absorbing channel.

[0035] In one of the embodiments, the panel is formed with a first bending portion on the side facing the bottom shell, the bottom shell is formed with a second bending portion on the side facing the panel, and the second bending portion is detachably connected with the first bending portion through the buffer pad.

[0036] A protective noise-reducing screen comprises a mounting frame and a plurality of the high-performance fireproof noise-reducing sound-absorbing composite plates according to any one of the above embodiments, the high-performance fireproof noise-reducing sound-absorbing composite plates are arranged on the mounting frame in sequence, and the high-performance fireproof noise-reducing sound-absorbing composite plates are detachably connected with the mounting frame.

[0037] A charging station comprises the protective noise-reducing screen according to any one of the above embodiments.

[0038] Compared with the prior art, the present application has at least the following advantages:

[0039] The high-performance fireproof noise-reducing soundproof composite board has one side with the sound absorption channel facing the charging station. Since a cavity is formed in the metal plate, and the first side wall of the cavity is formed with the sound absorption channel, the sound absorption channel is in communication with the cavity. Since the fireproof sound absorption piece is located in the cavity, the fireproof sound absorption piece can absorb the noise generated by the charging station into the cavity, so that the cavity can effectively prevent the noise from spreading outward, thereby achieving the effect of preliminary noise reduction. At this time, the noise in the cavity enters the fireproof sound absorption piece. Since the fireproof sound absorption piece is a semi-rigid polyurethane composite board, that is, the fireproof sound absorption piece has a semi-open and semi-closed structure, the fireproof sound absorption piece has sound insulation and sound absorption properties. Thus, the noise in the cavity can be better absorbed into the fireproof sound absorption piece, and the fireproof sound absorption piece can effectively reduce the noise in the cavity, thereby achieving the effect of secondary noise reduction. Further, since the added damping piece is a modified high-elasticity damping coating, the damping piece can reduce the vibration of the metal plate and the fireproof sound absorption piece, thereby effectively reducing the noise emission on the surface of the metal plate, thereby achieving better noise reduction effect, especially for the charging station noise reduction in residential areas. In addition, the fireproof sound absorption piece also has the function of fireproofing, thereby improving the safety of the charging station during use.

[0040] The high-performance fireproof noise-reducing soundproof composite board has one side with the sound absorption channel facing the charging station. Since a cavity is formed in the metal plate, and the first side wall of the cavity is formed with the sound absorption channel, the sound absorption channel is in communication with the cavity. Since the fireproof sound absorption piece is located in the cavity, the fireproof sound absorption piece can absorb the noise generated by the charging station into the cavity, so that the cavity can effectively prevent the noise from spreading outward, thereby achieving the effect of preliminary noise reduction. At this time, the noise in the cavity enters the fireproof sound absorption piece. Since the fireproof sound absorption piece is a semi-rigid polyurethane composite board, that is, the fireproof sound absorption piece has a semi-open and semi-closed structure, the fireproof sound absorption piece has sound insulation and sound absorption properties. Thus, the noise in the cavity can be better absorbed into the fireproof sound absorption piece, and the fireproof sound absorption piece can effectively reduce the noise in the cavity, thereby achieving the effect of secondary noise reduction. Further, since the added damping piece is a modified high-elasticity damping coating, the damping piece can reduce the vibration of the metal plate and the fireproof sound absorption piece, thereby effectively reducing the noise emission on the surface of the metal plate, thereby achieving better noise reduction effect, especially for the charging station noise reduction in residential areas. In addition, the fireproof sound absorption piece also has the function of fireproofing, thereby improving the safety of the charging station during use. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0042] Figure 1 A structural schematic view of one direction of the high-performance fireproof noise-reducing soundproof composite board of an embodiment of the present application;

[0043] Figure 2 A structural schematic view of one direction of the high-performance fireproof noise-reducing soundproof composite board of an embodiment of the present application; Figure 1 A structural schematic view of one direction of the high-performance fireproof noise-reducing soundproof composite board of an embodiment of the present application;

[0044] Figure 3 A structural schematic view of one direction of the high-performance fireproof noise-reducing soundproof composite board of an embodiment of the present application; Figure 1 A structural schematic view of one direction of the high-performance fireproof noise-reducing soundproof composite board of an embodiment of the present application;

[0045] Figure 4 For Figure 3 the local enlarged view at B shown in FIG.

[0046] Figure 5 the structural schematic view of the panel of an embodiment of the application;

[0047] Figure 6 For Figure 5 the local enlarged view at C shown in FIG.

[0048] Figure 7 the structural schematic view of the charging station in one direction of an embodiment of the application.

[0049] Reference signs: 10, high-performance fireproof noise reduction composite board; 100, metal plate; 110, cavity; 120, sound absorption channel; 121, downward inclined hole; 122, horizontal inflow hole; 123, upward inclined hole; 130, bottom shell; 131, first bending part; 132, first bending cavity; 140, panel; 141, second bending part; 143, bending channel; 200, fireproof sound absorption piece; 210, wave bending part; 220, sound absorbing hole; 230, exposed surface; 240, embedded part; 300, damping piece; 310, first connecting piece; 320, second connecting piece; 400, buffer pad; 500, narrowed sound absorbing area. DETAILED DESCRIPTION

[0050] In order to facilitate the understanding of the present application, the present application will be described more fully below in connection with the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present application can be more thoroughly and completely understood.

[0051] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions as used herein are for illustrative purposes only and are not intended to be limiting.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0053] The application provides a high-performance fireproof noise reduction and sound insulation composite board, which comprises a metal plate, a fireproof sound-absorbing piece and a damping piece, a cavity is formed in the metal plate, a sound-absorbing channel is formed in the first side wall of the cavity and the sound-absorbing channel is communicated with the cavity, and the fireproof sound-absorbing piece and the damping piece are sequentially arranged in the cavity; wherein the fireproof sound-absorbing piece is a semi-rigid polyurethane composite board, the damping piece is a modified high-elasticity damping coating, and the damping piece and the fireproof sound-absorbing piece are attached to each other.

[0054] The high-performance fireproof noise reduction and sound insulation composite board has one side with the sound-absorbing channel facing the charging station, the cavity is formed in the metal plate, the sound-absorbing channel is formed in the first side wall of the cavity and the sound-absorbing channel is communicated with the cavity, the fireproof sound-absorbing piece is arranged in the cavity, so that the fireproof sound-absorbing piece can absorb the noise generated by the charging station into the cavity, the noise generated by the charging station can be introduced into the cavity, the cavity can effectively prevent the noise from spreading outward, and the primary noise reduction effect is achieved, the noise in the cavity can enter the fireproof sound-absorbing piece, the fireproof sound-absorbing piece has a semi-open and semi-closed structure, so that the fireproof sound-absorbing piece has sound insulation and sound absorption properties, the noise in the cavity can enter the fireproof sound-absorbing piece and be blocked by the fireproof sound-absorbing piece, the fireproof sound-absorbing piece can effectively absorb, damp and insulate the noise in the cavity, and the secondary noise reduction effect is achieved, the damping piece is a modified high-elasticity damping coating, so that the damping piece can reduce the vibration of the metal plate and the fireproof sound-absorbing piece, the noise emission on the surface of the metal plate is effectively reduced, the better noise reduction effect is achieved, and the fireproof sound-absorbing piece can also play a fireproof function, so that the safety of the charging station in use is improved.

[0055] In order to better understand the technical solutions and beneficial effects of the application, the application is further described in detail below in combination with specific embodiments.

[0056] As Figures 1 to 3As shown, the high-performance fireproof noise reduction sound insulation composite board 10 of one embodiment includes a metal plate, a fireproof sound-absorbing piece 200, and a damping piece 300, a cavity 110 is formed in the metal plate, a sound-absorbing channel 120 is formed on a first side wall of the cavity 110, the sound-absorbing channel 120 is communicated with the cavity 110, and the fireproof sound-absorbing piece 200 and the damping piece 300 are sequentially arranged in the cavity 110; wherein the fireproof sound-absorbing piece 200 is a semi-rigid polyurethane composite board, the damping piece 300 is a modified high-elasticity damping coating, and the damping piece 300 and the fireproof sound-absorbing piece 200 are attached to each other.

[0057] It should be noted that in the application of traditional noise reduction measures, sound insulation materials usually use lightweight sound insulation products such as slag wool and glass wool. Due to its unique cavity structure, the sound absorption coefficient reaches 0.5-0.6 (1000Hz) while achieving lightweight, but the product itself has problems such as water absorption swelling, mechanical strength, etc., so it cannot be widely used. Therefore, the market has developed some new sound insulation materials, such as foam, phenolic board, and polyurethane foam board, which are high-molecular new materials. Compared with metal and inorganic materials, as shown in the following Table 1:

[0058] Table 1 Sound absorption coefficient of different materials

[0059] Material Wood board Mineral wool Rock wool Three-ply board Fiber board High polymer new material Sound absorption coefficient 0.03 0.55 0.37 0.3 0.6 ≥0.7

[0060] As can be seen from Table 1 above, high-molecular new materials have good sound absorption coefficient, thereby achieving good noise reduction and sound insulation effect, and have become the main direction of current noise reduction research and development.

[0061] However, in actual application, although the new type of polymer material only meets the actual application requirements in terms of sound absorption coefficient, its mechanical strength cannot meet the actual application requirements. Therefore, some researchers have developed a new type of noise reduction material, such as the patent CN112854514A discloses a light high-explosion-resistant unit plate, and specifically discloses that the unit plate (2) comprises mutually parallel arranged outer metal plate layer (33), middle metal plate layer (32), inner metal plate layer (31), energy absorption layer (4), foam metal plate layer (5), the energy absorption layer (4) comprises a plurality of energy absorption sub-layers (41), each energy absorption sub-layer (41) comprises a plurality of mutually parallel arranged energy absorption pipes (42); each energy absorption pipe (42) of each energy absorption sub-layer (41) is filled with a first energy absorption material (6), or, between each energy absorption pipe (42) of each energy absorption sub-layer (41) is filled with a second energy absorption material (61), or, each energy absorption pipe (42) of each energy absorption sub-layer (41) is filled with a first energy absorption material (6) and each energy absorption pipe (42) of each energy absorption sub-layer (41) is filled with a second energy absorption material (61), and further discloses that the first energy absorption material (6) is a hard polyurethane foam, and the second energy absorption material (61) is a soft polyurethane foam, so that not only the mechanical strength of the light high-explosion-resistant unit plate is increased, but also the polyurethane foam plate combined with hard and soft can not only improve the dynamic energy absorption characteristics to achieve good noise reduction requirements, but also effectively slow down the impact and weaken the oscillation.

[0062] Although the above-mentioned unit plate can well improve the mechanical strength of the unit plate as a whole and achieve good noise reduction performance, the structure is relatively complex. That is, the traditional polyurethane foam combined with soft and hard is used, since the soft polyurethane foam is a completely open-cell structure, it has excellent sound absorption performance, and at the same time, the use of the hard polyurethane foam plate can achieve good energy absorption and buffering effect, but since the soft polyurethane foam is a completely open-cell structure, it has high water absorption performance, thereby causing the overall weather resistance of the unit plate to be poor, which is not suitable for application scenarios of open-type noise reduction structures, such as charging stations in residential areas.

[0063] Therefore, in the present application, by improving the material of the fireproof sound absorption piece, not only the mechanical strength and weather resistance of the fireproof sound absorption piece are improved, but also the structure of the high-performance fireproof noise reduction and sound insulation composite board is improved, so as to better improve the mechanical strength, weather resistance and fireproof performance of the high-performance fireproof noise reduction and sound insulation composite board, and better adapt to the application scenarios of open-type noise reduction structures, especially the charging stations in residential areas.

[0064] Firstly, by improving the material of the fireproof sound-absorbing piece, i.e. directly using a semi-rigid polyurethane composite board as the fireproof sound-absorbing piece to replace the traditional soft and hard combined complex structure. It can be understood that the fireproof sound-absorbing piece 200 is a semi-rigid polyurethane composite board, i.e. the fireproof sound-absorbing piece 200 has a semi-open hole and a semi-closed hole structure. Specifically, the sound-absorbing piece 200 forms a sound-absorbing hole 220, and the porosity of the sound-absorbing hole 220 is 50%~70%. In this way, compared with the traditional soft and hard combined polyurethane foam board, the structure of the fireproof sound-absorbing piece 200 is simplified, and the single-layer semi-rigid polyurethane composite board directly achieves good mechanical strength, weather resistance and noise reduction performance, especially suitable for the application of open type noise reduction structure in the charging station of residential area.

[0065] Secondly, the structure of the high-performance fireproof noise reduction and sound insulation composite board is improved. Specifically, the fireproof sound-absorbing piece 200 and the damping piece 300 are sequentially arranged in the cavity 110. Since the fireproof sound-absorbing piece 200 and the damping piece 300 are sequentially arranged in the cavity 110, the fireproof sound-absorbing piece 200 and the damping piece 300 are effectively prevented from being directly exposed to the outside, so as to avoid damage to the fireproof sound-absorbing piece 200 and the damping piece 300 by the external bad environment, thereby improving the service life of the fireproof sound-absorbing piece 200 and the damping piece 300. When the high-performance fireproof noise reduction and sound insulation composite board is applied to the charging station in the residential area, one side with the sound-absorbing channel 120 faces the charging station. Since the metal plate forms a cavity 110, and the first side wall of the cavity 110 forms a sound-absorbing channel 120, the sound-absorbing channel 120 communicates with the cavity 110, and the fireproof sound-absorbing piece 200 is located in the cavity 110, the fireproof sound-absorbing piece 200 can absorb the noise generated by the charging station into the cavity 110, so that the fireproof sound-absorbing piece 200 can introduce the noise generated by the charging station into the cavity 110. In this way, the cavity 110 can effectively block the noise, thereby effectively preventing the noise from spreading outward and achieving the effect of preliminary noise reduction. At this time, the noise entering the cavity 110 enters the fireproof sound-absorbing piece 200. Since the fireproof sound-absorbing piece 200 is a semi-rigid polyurethane composite board, i.e. the fireproof sound-absorbing piece 200 has a semi-open hole and a semi-closed hole structure, the fireproof sound-absorbing piece 200 simultaneously has sound insulation and sound absorption performance. In this way, it is ensured that the noise in the cavity 110 can enter the fireproof sound-absorbing piece 200 and be blocked by the fireproof sound-absorbing piece 200, so as to ensure that the fireproof sound-absorbing piece 200 can well absorb, attenuate and insulate the noise in the cavity 110, thereby achieving the effect of secondary noise reduction. Further, since the added damping piece 300 is a modified high-elasticity damping coating, the damping piece 300 can reduce the vibration of the metal plate and the fireproof sound-absorbing piece 200, thereby effectively reducing the noise emission on the surface of the metal plate, and achieving better noise reduction effect, especially suitable for the noise prevention of the charging station in the residential area.

[0066] Finally, the metal plate is used as the shell, which can better improve the mechanical strength and weather resistance of the high-performance fireproof and noise-reducing composite board, and better adapt to the open noise-reducing structure. At the same time, the fireproof and sound-absorbing piece 200 also improves the fireproof function, thereby improving the safety of the charging station during use.

[0067] It should be further pointed out that when the noise generated by the charging station is large in amplitude, due to the elasticity of the fireproof and sound-absorbing piece 200, if the noise with large amplitude enters the fireproof and sound-absorbing piece 200, it is easy to cause the metal plate to vibrate, thereby increasing the noise emission on the surface of the metal plate. Therefore, in the present application, the damping piece 300 is provided as a modified high-elasticity damping coating, and the damping piece 300 and the fireproof and sound-absorbing piece 200 are attached to each other, so that the modified high-elasticity damping coating can convert the vibration energy of the semi-rigid polyurethane composite board into electrical energy, and finally convert it into heat energy, thereby reducing the vibration between the metal plate and the fireproof and sound-absorbing piece, and thereby ensuring that the damping piece 300 can play a role in reducing vibration for the metal plate and the fireproof and sound-absorbing piece 200, so as to effectively reduce the noise emission on the surface of the metal plate, so as to achieve better noise reduction effect and better adapt to the charging station noise reduction of residential area.

[0068] In order to prepare the semi-rigid polyurethane composite board, in one embodiment, the semi-rigid polyurethane composite board comprises the following mass fractions: 3-functional polyether polyol 30-40 parts; 2-functional polyether polyol 10-15 parts; isocyanate 20-30 parts; liquid flame retardant 11-25 parts; powder flame retardant 3-15 parts; expandable graphite 10-15 parts; catalyst 0.15-0.5 parts; pore former 0.5-1.0 parts; foam stabilizer 0.5-1.0 parts; foaming agent 0.5-1.0 parts.

[0069] It can be understood that by compounding 30-40 parts of 3-functional polyether polyol, 10-15 parts of 2-functional polyether polyol and 20-30 parts of isocyanate, especially with 0.5-1.0 parts of pore former, 0.5-1.0 parts of foam stabilizer and 0.5-1.0 parts of foaming agent, the semi-rigid polyurethane composite board can be prepared, and at the same time, 11-25 parts of liquid flame retardant, 3-15 parts of powder flame retardant and 10-15 parts of expandable graphite can be added to improve the fire-retardant performance of the semi-rigid polyurethane composite board, and 0.15-0.5 parts of catalyst can be added to accelerate the reaction speed of polyether polyol and isocyanate, so as to quickly prepare the semi-rigid polyurethane composite board with stable structure.

[0070] It is worth mentioning that the density of the semi-rigid polyurethane composite board prepared by the formula of the present application is ≤100 kg / m 3, thickness ≤50mm, foam opening rate 50%~70% to ensure that the semi-rigid polyurethane composite board has the characteristics of light weight, good mechanical strength, good weather resistance and good fireproof and noise reduction performance to better adapt to the charging station of the residential area.

[0071] It should be noted that by compounding the 3-functional polyether polyol with the 2-functional polyether polyol, the three-dimensional network structure formed by the polymerization of the three-functional polyether polyol during cross-linking, and the addition of the linear 2-functional polyether polyol can further increase the length of the single-chain molecules of the three-dimensional structure, thereby better controlling the bubble pore size and opening rate of the polyurethane high molecular polymer, and thus ensuring the stability of the foam opening rate of the semi-rigid polyurethane composite board, while taking into account the coating of more fire-retardant components, improving the flame retardance of the semi-rigid polyurethane composite board.

[0072] In one embodiment, the modified high-elasticity damping coating includes the following mass fractions: polyurethane prepolymer 50~60 parts; isocyanate 5~10 parts; catalyst 0.1~1 part; flame retardant 1~10 parts; expandable graphite 5~10 parts; piezoelectric material 5~10 parts; and flaky filler 3~15 parts.

[0073] It can be understood that by adding piezoelectric material to the polyurethane prepolymer and isocyanate, the modified high-elasticity damping coating can convert vibration energy into electrical energy when subjected to external vibration interference, and then convert the electrical energy into heat energy, and finally dissipate the heat energy, to achieve the conversion of mechanical energy-electrical energy-thermal energy. Specifically, since the modified high-elasticity damping coating uses polyurethane prepolymer and isocyanate as the base material to better ensure that the modified high-elasticity damping coating has good high-elasticity and bonding properties, so that the user can better bond the metal plate and the semi-rigid polyurethane composite board, the addition of flaky filler can well improve the strength of the modified high-elasticity damping coating, thereby improving the overall mechanical strength of the modified high-elasticity damping coating, and the flaky filler and expandable graphite help dissipate heat energy, thereby well ensuring that the damping member 300 can play a role in reducing vibration for the metal plate and the fireproof sound-absorbing member 200. In addition, since the modified high-elasticity damping coating and the fireproof sound-absorbing member 200 are both made of polyurethane material, the modified high-elasticity damping coating and the fireproof sound-absorbing member 200 have good bonding properties during production, thereby improving the stability of the connection between the modified high-elasticity damping coating and the fireproof sound-absorbing member 200.

[0074] Further, since the use conditions of the modified high-elasticity damping coating are no longer limited by the environment and vibration frequency, the user can better produce it.

[0075] In one embodiment, the flaky filler includes at least one of mica sheet, vermiculite and aluminum powder to ensure that the added flake can better improve the strength of the modified high-elasticity damping coating.

[0076] In a preferred embodiment, the flaky filler is a mixture of mica sheet, vermiculite and aluminum powder, the mass fraction of the mica sheet is 1-5 parts, the mass fraction of the vermiculite is 1-5 parts and the mass fraction of the aluminum powder is 1-5 parts.

[0077] In a preferred embodiment, the piezoelectric material is barium titanate. Since barium titanate has high dielectric constant, the barium titanate can better convert the vibration of the fireproof sound-absorbing member 200 into electrical energy, then convert the electrical energy into heat energy, and finally dissipate the heat energy, so that the damping member 300 can play a role in reducing the vibration of the metal plate and the fireproof sound-absorbing member 200, thereby achieving a better noise reduction and sound insulation effect.

[0078] In one embodiment, the powder fire retardant includes at least one of magnesium hydroxide, aluminum hydroxide and ammonium octamolybdate.

[0079] In one embodiment, the liquid fire retardant includes at least one of tertiary butylated phenyl phosphate and melamine phosphate.

[0080] In one embodiment, the sound absorption coefficient of the fireproof sound-absorbing member 200 is greater than 0.7 to ensure that the fireproof sound-absorbing member 200 can better absorb noise.

[0081] In one embodiment, the fireproof sound-absorbing member 200 has a plurality of wave-shaped bending portions 210 on the side facing the sound-absorbing channel 120.

[0082] It can be understood that by adding a plurality of wave-shaped bending portions 210 on the side of the fireproof sound-absorbing member 200 facing the sound-absorbing channel 120, the number of refractions of noise in the fireproof sound-absorbing member 200 is increased, and the contact area of the noise with the fireproof sound-absorbing member 200 is also increased, thereby improving the noise reduction effect of the fireproof sound-absorbing member 200.

[0083] As shown in Figure 1 , Figure 3 and Figure 4 , in one embodiment, the metal plate includes a panel 140 and a bottom shell 130, the bottom shell 130 has the cavity 110 formed therein, the bottom shell 130 is detachably connected with the panel 140, and the panel 140 has the sound-absorbing channel 120 formed therein.

[0084] It is understandable that, since the metal plate 100 includes a front panel 140 and a bottom shell 130, and the bottom shell 130 and the front panel 140 are detachably connected, it not only facilitates quick assembly and disassembly of the bottom shell 130 and the front panel 140, but also facilitates transportation or installation, and allows users to easily replace damaged front panels 140 and bottom shells 130, thereby reducing maintenance costs. Furthermore, since the damping element 300 and the fireproof sound-absorbing element 200 are sequentially arranged within the cavity 110, the damping element 300 can abut against the fireproof sound-absorbing element 200, ensuring the damping effect of the damping element 300 on the fireproof sound-absorbing element 200, and ensuring the compactness of the fireproof noise-reducing and sound-insulating composite panel 10. Even further, the damping element 300 abuts against the second sidewall, thus ensuring that the damping element 300 can effectively reduce vibration for both the fireproof sound-absorbing element 200 and the metal plate 100.

[0085] It should be noted that, since the bottom shell 130 and the panel 140 are detachable, if a large amount of high-amplitude noise enters the cavity, it can easily cause vibration between the bottom shell 130 and the panel 140, resulting in noise from both. Therefore, as Figure 2 As shown, in one embodiment, the fireproof, noise-reducing, and sound-insulating composite panel further includes a buffer pad 400, which is disposed between the panel 140 and the bottom shell 130.

[0086] It is understandable that by adding a buffer pad 400 between the panel 140 and the bottom shell 130, on the one hand, the connection strength between the panel 140 and the bottom shell 130 is better ensured, thereby ensuring the stability of the fireproof noise reduction and sound insulation composite board 10 structure. On the other hand, it can play a better buffering role for the panel 140 and the bottom shell 130, thereby effectively reducing the vibration of the panel 140 and the bottom shell 130 to reduce the generation of noise, and thus improving the noise reduction effect of the fireproof noise reduction and sound insulation composite board 10.

[0087] like Figure 1 and Figure 3 As shown, in one embodiment, the panel 140 has a first bending portion 131 on the side facing the bottom shell 130, and the bottom shell 130 has a second bending portion 141 on the side facing the panel 140. The second bending portion 141 is fastened to the first bending portion 131 through the buffer pad 400.

[0088] It can be understood that when the panel 140 is connected with the bottom shell 130, the added first bending part 131 and the second bending part 141 can form a bending channel 143, thereby improving the way of noise into the cavity 110, and further improving the unit total amount of noise into the cavity 110, and further better improving the noise reduction effect of the fireproof noise reduction sound insulation composite board 10 on the charging station. The added first bending part 131 and the second bending part 141 can better improve the connection strength between the bottom shell 130 and the panel 140, thereby better improving the structural stability of the fireproof noise reduction sound insulation composite board 10.

[0089] In the embodiment, the first bending part 131 forms a first bending cavity 132 on the panel 140, and the second bending part 141 forms a second bending cavity on the bottom shell 130. When the bottom shell 130 is connected with the panel 140, the first bending cavity 132 and the second bending cavity form the cavity 110, thereby increasing the propagation path of noise in the cavity 110, and further ensuring that the cavity 110 has a good preliminary noise reduction effect on noise. At the same time, the bending channel 143 formed can well reduce part of the external noise, effectively avoid a large amount of noise with large amplitude directly entering the cavity 110 to cause the fireproof sound-absorbing piece 200 to vibrate easily, and cause the bottom shell 130 and the panel 140 to generate a large noise, thereby better ensuring the noise reduction effect of the high-performance fireproof noise reduction sound insulation composite board 10.

[0090] As shown in Figure 4 In one embodiment, the two sides of the bending channel 143 are horn-shaped arcs, thereby ensuring that the external noise can better enter the bending channel 143 to achieve the noise reduction effect on part of the external noise.

[0091] In order to ensure that the noise can better enter the cavity 110 from the bending channel 143, in one embodiment, the buffer pad 400 is wave-shaped. It can be understood that by setting the buffer pad 400 to be wave-shaped, the contact area of the buffer pad 400 with the first bending part 131 and the second bending part 141 is increased, thereby improving the connection structure of the bottom shell 130 and the panel 140. At the same time, when the wave-shaped buffer pad 400 is filled in the first bending part 131 and the second bending part 141, a small gap can be formed, so that the noise can better enter the cavity 110 from the plurality of small gaps, thereby ensuring that the noise can better enter the cavity 110 from the bending channel 143.

[0092] In one embodiment, the wave-shaped port of the first end of the buffer pad 400 is larger than the wave-shaped port of the second end, and the wave-shaped port of the first end of the buffer pad 400 is located on the outside. In this way, the noise in the cavity 110 is more difficult to flow out to the charging station from the plurality of small gaps, thereby better ensuring the noise reduction effect of the high-performance fireproof noise reduction sound insulation composite board 10.

[0093] AsFigure 1 and Figure 3 As shown, in one embodiment, the first bend 131 is a single right-angle bend to ensure that the first bend 131 forms a first bend cavity 132 with a single detour in the panel 140, and the second bend 141 is a double right-angle bend to ensure that the second bend 141 forms a second bend cavity with a double detour in the bottom shell 130. In this way, the noise entering the cavity can be better dispersed and reflected by the second bend 141, thereby achieving a better noise reduction effect.

[0094] like Figure 5 and Figure 6 As shown, in one embodiment, the sound-absorbing channel 120 is a through hole to ensure that noise can enter the cavity 110 normally.

[0095] It should be noted that this application uses a perforated panel 140 to ensure a more uniform noise distribution within the cavity 110. Compared to a louvered panel 140, since the louvered opening is larger than the perforated opening, when there is a lot of external vibration and noise, more high-amplitude noise can directly enter the cavity 110, causing the fireproof sound-absorbing component 200 to vibrate and resulting in significant noise between the bottom shell 130 and the panel 140. This better ensures the noise reduction effect of the high-performance fireproof noise reduction and sound insulation composite board 10. Although the perforated design effectively avoids the phenomenon of a lot of high-amplitude noise directly entering the cavity 110 and causing the fireproof sound-absorbing component 200 to vibrate and resulting in significant noise between the bottom shell 130 and the panel 140, if the number of perforations is small, the amount of noise entering the cavity 110 at one time will be smaller, thereby reducing the noise reduction effect of the high-performance fireproof noise reduction and sound insulation composite board 10. Therefore, in order to ensure a large noise level when entering the cavity 110 at a time, while avoiding noise generated by the bottom shell 130 and the panel 140, in one embodiment, the number of through holes is multiple, and the opening ratio of the panel 140 is 25%~35%. This ensures that the noise level when entering the cavity 110 at a time is appropriate. That is, while ensuring that the high-performance fireproof noise reduction and sound insulation composite board 10 has a good noise reduction effect, it also avoids noise generated by the bottom shell 130 and the panel 140 directly entering the cavity 110 due to a large amount of high-amplitude noise, which would cause the fireproof sound-absorbing component 200 to vibrate easily. This is to better adapt to the application of open-type noise reduction structures.

[0096] like Figure 5As shown, in one of the embodiments, each of the through holes is divided into a plurality of horizontal inflow holes 122, a plurality of downwardly inclined holes 121 and a plurality of upwardly inclined holes 123, the plurality of downwardly inclined holes 121 are arranged close to the first side edge of the panel 140, the plurality of upwardly inclined holes 123 are arranged close to the second side edge of the panel 140, the first side edge is arranged opposite to the second side edge, the plurality of horizontal inflow holes 122 are arranged between the first side edge and the second side edge of the panel 140, and the plurality of horizontal inflow holes 122 are arranged in a matrix on the panel 140, so that the plurality of downwardly inclined holes 121 and the plurality of upwardly inclined holes 123 are arranged on both sides of the horizontal inflow holes 122, on the one hand, to ensure that the noise on both sides can flow to the middle to gather, effectively avoiding the noise from flowing into the bending channel 143, thereby reducing the amount of noise close to the bending channel 143 to effectively avoid the phenomenon that more noise flows out of the bending channel 143, on the other hand, because the plurality of downwardly inclined holes 121 and the plurality of upwardly inclined holes 123 can generate two different direction noise "air flows" on both sides of the panel 140, to ensure that the two generated noise "air flows" can disperse the more concentrated noise "air flow" in the middle, so that the noise in the cavity 110 can better spread from the second bending cavity to the surrounding, thereby ensuring that the noise in the cavity 110 can be more comprehensively into the fireproof sound-absorbing member 200, to ensure that the fireproof sound-absorbing member 200 can more comprehensively absorb, damp and insulate the noise in the cavity 110, to better achieve the effect of noise reduction.

[0097] In order to ensure that the noise "air flow" entering the downwardly inclined hole 121 can better disperse the more concentrated noise in the middle, as shown, Figure 6 In one of the embodiments, the downwardly inclined hole 121 is formed with a first preset position and a first preset inclination angle on the panel 140, to ensure that the noise "air flow" entering the downwardly inclined hole 121 can better disperse the more concentrated noise "air flow". Similarly, in one of the embodiments, the upwardly inclined hole 123 is formed with a second preset position and a second preset inclination angle, to ensure that the noise "air flow" entering the upwardly inclined hole 123 can better disperse the more concentrated noise "air flow", to ensure that the noise in the cavity 110 can be more evenly into the fireproof sound-absorbing member 200, effectively avoiding that the fireproof sound-absorbing member 200 has more noise in the local to cause the noise reduction effect of the fireproof sound-absorbing member 200 to be poor.

[0098] In one of the embodiments, the hole diameter of the downwardly inclined hole 121 and the hole diameter of the upwardly inclined hole 123 are both greater than the hole diameter of the horizontal inflow hole 122, so that the noise "air flow" entering the downwardly inclined hole 121 and the upwardly inclined hole 123 on both sides can disperse the noise "air flow" of the horizontal inflow hole 122.

[0099] In one embodiment, the first preset tilt angle is 20°~55°. It can be understood that by setting the first preset tilt angle to 20°~55°, it is ensured that the noise "airflow" entering from the downward tilting hole 121 can better disperse the noise that is more concentrated in the middle. In particular, in conjunction with the use of the second preset tilt angle of 15°~45°, it is better ensured that the noise "airflow" from the downward tilting hole 121 and the upward tilting hole 123 can better disperse the noise "airflow" that is more concentrated in the middle.

[0100] In one embodiment, the opening ratio of the downwardly inclined hole 121 accounts for 6% to 10% of the total through hole ratio, and the opening ratio of the upwardly inclined hole 123 accounts for 5% to 10% of the total through hole ratio, so as to ensure that the noise "airflow" of the downwardly inclined hole 121 and the upwardly inclined hole 123 can better disperse the noise "airflow" that is more concentrated in the middle.

[0101] It is understandable that, since the fireproof sound-absorbing component 200 is a semi-rigid polyurethane composite board with a certain degree of elasticity, it provides a certain buffering effect. However, if a large amount of high-amplitude noise enters the cavity 110, the fireproof sound-absorbing component 200 may still vibrate, causing the bottom shell 130 and the panel 140 to vibrate and generate noise. Therefore, in this application, by setting the damping component 300 as a damping cover, the damping cover can more fully adhere to and abut against the fireproof sound-absorbing component 200, that is, the damping cover sleeves the fireproof sound-absorbing component 200 inside, thereby ensuring that the damping cover can effectively convert the vibration generated by the fireproof sound-absorbing component 200 into heat and dissipate it, so as to effectively reduce the friction between the bottom shell 130 and the panel 140, and thus more effectively avoid the phenomenon that the bottom shell 130 and the panel 140 are prone to vibration, that is, to more comprehensively reduce the noise emission from the surface of the metal plate.

[0102] In one embodiment, a receiving cavity is formed within the damping cover. The fireproof sound-absorbing component 200 has an exposed surface 230 on its side facing away from the damping cover, and this exposed surface 230 protrudes from one side of the damping cover. The height of the exposed surface 230 is equal to the height of the cavity 110. This ensures that the exposed surface 230 of the fireproof sound-absorbing component 200 has the largest area within the cavity 110, thereby maximizing the single-time noise reduction effect of the exposed surface 230 on the noise within the cavity 110. Thus, while ensuring excellent noise reduction performance of the fireproof sound-absorbing component 200, it also minimizes noise emission from the metal plate surface, achieving a better noise reduction effect.

[0103] like Figure 3As shown, in one embodiment, the damping member 300 includes a first connector 310, a second connector 320, and a third connector. The first connector 310, the second connector 320, and the third connector are connected end to end to form a receiving cavity. The fireproof sound-absorbing member 200 includes an embedded part 240 and an exposed surface 230 connected to each other. The embedded part 240 is completely received in the receiving cavity, so that the exposed surface 230 protrudes from the outside of the fireproof sound-absorbing member 200. This ensures that the damping member 300 can well cover the fireproof sound-absorbing member 200. In this way, not only is the stability of the connection between the damping member 300 and the fireproof sound-absorbing member 200 ensured, but also the damping member 300 can more comprehensively reduce the noise emission from the surface of the metal plate to achieve a better noise reduction effect.

[0104] To ensure that the two sides of the fireproof sound-absorbing component 200 do not easily vibrate under high-amplitude noise, such as Figure 3 As shown, in one embodiment, the lengths of the first connector 310 and the third connector are 1 / 3 to 2 / 3 of the width of the fireproof sound-absorbing component 200. This ensures that the first connector 310 and the third connector on both sides can effectively convert the vibration of the fireproof sound-absorbing component 200, thereby reducing noise emission from the surface of the metal plate more comprehensively.

[0105] In one embodiment, the fireproof sound-absorbing component 200 occupies 1 / 4 to 2 / 3 of the length of the cavity 110. It is understandable that by setting the fireproof sound-absorbing component 200 to occupy 1 / 4 to 2 / 3 of the length of the cavity 110, the position of the fireproof sound-absorbing component 200 within the cavity 110 is appropriately positioned. This not only allows the amount of single noise entering the cavity 110 to be more comprehensively absorbed and reduced by the fireproof sound-absorbing component 200, but also ensures that the fireproof sound-absorbing component 200 and the second bend 141 form a narrowed noise reduction zone 500. Thus, when the noise "airflow" entering through the multiple downward-sloping holes 121 and multiple upward-sloping holes 123 on both sides of the panel 140, the relatively concentrated noise "airflow" in the middle can be dispersed to the narrowed noise reduction zone 500. This allows the narrowed noise reduction zone 500 to have a certain noise reduction effect, ensuring that the noise reduction amplitude entering the narrowed noise reduction zone 500 is small. This effectively avoids the phenomenon that the two sides of the fireproof sound-absorbing component 200 are prone to vibration and noise emission due to the large noise amplitude, thus ensuring that the fireproof sound-absorbing component 200 can reduce noise more comprehensively.

[0106] It is worth mentioning that, since the fireproof sound-absorbing component 200 has a certain expansion rate, namely an expansion rate of ≥3.5 times, when the fireproof sound-absorbing component 200 occupies 1 / 4 to 2 / 3 of the length of the cavity 110, it ensures that the position of the fireproof sound-absorbing component 200 in the cavity 110 is more suitable. On the one hand, it ensures that the noise entering the cavity 110 at one time can be fully absorbed, silenced and sound-insulated by the fireproof sound-absorbing component 200 to achieve a good noise reduction effect. On the other hand, it provides a suitable expansion space for the fireproof sound-absorbing component 200 to ensure that when the high-performance fireproof noise reduction and sound insulation composite board 10 encounters a fire, the fireproof sound-absorbing component 200 will not break the bottom shell 130 and the panel 140 after expansion. This improves the recycling rate of the bottom shell 130 and the panel 140, reduces the use cost, and is conducive to green environmental protection.

[0107] In one preferred embodiment, the fireproof sound-absorbing component 200 occupies 1 / 2 to 2 / 3 of the length of the cavity 110. In a more preferred embodiment, the thickness of the fireproof sound-absorbing component 200 is 33mm to 35mm, and the width of the cavity is 48mm to 55mm. Especially when used in conjunction with the damping component 300, which has a thickness of 2mm to 6mm, it can achieve better fireproof and noise reduction effects while ensuring that the fireproof sound-absorbing component 200 will not break the bottom shell 130 and the panel 140 after expansion. This improves the recycling rate of the bottom shell 130 and the panel 140, reduces the cost of use, and is conducive to environmental protection.

[0108] like Figure 3 As shown, in one embodiment, the two ends of the exposed surface 230 are hemispherical convex surfaces, which can better reflect the narrowed sound absorption area 500, so that the two sides of the fireproof sound-absorbing component 200 can better reduce noise, and at the same time better avoid the phenomenon that the two sides of the fireproof sound-absorbing component 200 are prone to vibration.

[0109] In one embodiment, the panel 140 is made of galvanized steel sheet. Since galvanized steel sheet has good weather resistance, it can better improve the weather resistance of the high-performance fireproof noise reduction and sound insulation composite panel 10. In particular, when combined with the use of stainless steel metal sheet for the bottom shell 130, the weather resistance of the high-performance fireproof noise reduction and sound insulation composite panel 10 is further improved, making it more suitable for open-type noise reduction structure applications.

[0110] In one embodiment, the bottom shell 130 and the panel 140 are both integrally molded structures to better ensure the stability of the bottom shell 130 and the panel 140 structure, thereby improving the service life of the high-performance fireproof and noise-reducing composite board 10.

[0111] This application also provides a method for preparing a high-performance fireproof and noise-reducing composite panel. First, the various substances in the formulations of the fireproof sound-absorbing component and the damping component are prepared separately. Then, the components in the fireproof sound-absorbing component are mixed and injected into a mold for curing to obtain a semi-rigid foam polyurethane sound-absorbing sheet. Finally, the semi-rigid foam polyurethane sound-absorbing sheet is cut into the required thickness and shape using a cutting machine to obtain a semi-rigid polyurethane composite panel for later use. Next, polyurethane prepolymer, catalyst, flame retardant, expandable graphite, barium titanate, mica sheets, vermiculite, and aluminum powder are mixed and cured to obtain a modified high-elasticity damping coating component A. Then, the modified high-elasticity damping coating is mixed with isocyanate to obtain a modified high-elasticity damping coating. Finally, the mixed modified high-elasticity damping coating is applied to the bottom of the cavity inside the bottom shell to form a modified high-elasticity damping coating in the cavity. Then, the semi-rigid polyurethane composite panel is bonded to the modified high-elasticity damping coating. Finally, the bottom shell is fastened to the panel to obtain a high-performance fireproof, noise-reducing, and sound-insulating composite panel.

[0112] The above-mentioned method for preparing high-performance fireproof and noise-reducing composite panels utilizes polyurethane for both the fireproof sound-absorbing and damping components. This allows the semi-rigid polyurethane composite panel to adhere well to the modified high-elasticity damping coating, thereby improving the adhesion between the modified high-elasticity damping coating and the component. It should be noted that because the fireproof sound-absorbing and damping components are sequentially arranged within the cavity, and the fireproof sound-absorbing component has a wavy bend and a hemispherical convex surface, directly coating the fireproof sound-absorbing component onto the damping component before cutting is difficult for the user to perform flexible cutting operations due to the obstruction and restriction of the bottom shell. Furthermore, it can easily scratch the bottom shell. Therefore, in this application, by pre-fabricating the fireproof sound-absorbing component into a semi-rigid polyurethane composite board of the required thickness and shape, the cutting operation outside the bottom shell is realized, which is conducive to more flexible operation by the user and is not easy to scratch the bottom shell. In this way, not only are the noise reduction requirements of the fireproof sound-absorbing component for noise reflection at different angles met, but the manufacturing quality of the high-performance fireproof noise reduction and sound insulation composite board is also well ensured, so as to better meet the noise reduction requirements of open noise reduction structure, especially suitable for fireproof and noise reduction of charging stations in residential areas.

[0113] like Figure 7 As shown, this application also provides a protective noise reduction barrier, including an installation frame and a high-performance fireproof noise reduction and sound insulation composite board 10 as described in any of the above embodiments. There are multiple high-performance fireproof noise reduction and sound insulation composite boards 10, and each of the high-performance fireproof noise reduction and sound insulation composite boards 10 is arranged sequentially on the installation frame, and each of the high-performance fireproof noise reduction and sound insulation composite boards 10 is detachably connected to the installation frame.

[0114] It is understood that since multiple high-performance fireproof, noise-reducing, and sound-insulating composite panels 10 are detachably connected to the mounting frame, it is convenient for users to disassemble and assemble them, and also convenient for users to replace damaged high-performance fireproof, noise-reducing, and sound-insulating composite panels 10 individually, thereby reducing maintenance costs. Furthermore, since the high-performance fireproof, noise-reducing, and sound-insulating composite panel 10 of this application has high weather resistance and mechanical strength, and has a simple structure and is lightweight, it is more conducive to transportation and installation. At the same time, the high-performance fireproof, noise-reducing, and sound-insulating composite panel 10 has good noise reduction and fireproof performance, not only providing protection but also achieving good fireproof and noise reduction effects, thus combining protection and noise reduction. The structure is simple and it is especially suitable for fireproofing and noise reduction of charging stations in residential areas.

[0115] Furthermore, since the mounting frame can better fix the high-performance fireproof, noise-reducing, and sound-insulating composite board 10, it can better ensure the stability of the connection between the bottom shell 130 and the panel 140, thereby more effectively preventing a large amount of high-amplitude noise from entering the cavity 110 and causing the bottom shell 130 and panel 140 to vibrate, thus effectively reducing the generation of noise.

[0116] like Figure 7 As shown, this application also provides a charging station, including the protective noise reduction barrier described in any of the above embodiments. It is understood that by applying the protective noise reduction barrier of this application to a charging station, due to the barrier's lightweight, high mechanical strength, good fire resistance, good noise reduction performance, and good weather resistance, it can not only provide excellent protection for the charging station but also achieve good fire prevention and noise reduction effects, making it particularly suitable for fire prevention and noise reduction in residential charging stations.

[0117] Compared with the prior art, the present invention has at least the following advantages:

[0118] The aforementioned high-performance fireproof, noise-reducing, and sound-insulating composite panel 10 has its side with the sound-absorbing channel 120 facing the charging station. A cavity 110 is formed within the metal panel, and the first sidewall of the cavity 110 has a sound-absorbing channel 120 connected to the cavity 110. Since the fireproof sound-absorbing component 200 is located within the cavity 110, it can absorb noise generated by the charging station into the cavity 110. This allows the cavity 110 to effectively block noise, preventing its spread and achieving initial noise reduction. Noise entering the cavity 110 then enters the fireproof sound-absorbing component 200, further reducing noise levels. The sound-absorbing component 200 is a semi-rigid polyurethane composite board. This fire-resistant sound-absorbing component 200 has a semi-open, semi-closed-cell structure, allowing it to simultaneously possess sound insulation and sound absorption properties. This ensures that noise from the cavity 110 can effectively enter and be blocked by the fire-resistant sound-absorbing component 200, effectively absorbing, eliminating, and insulating noise within the cavity 110, achieving a secondary noise reduction effect. Furthermore, the added damping component 300, with its modified high-elasticity damping coating, effectively reduces vibrations on both the metal plate and the fire-resistant sound-absorbing component 200, significantly reducing noise emission from the metal plate surface and achieving even better noise reduction, particularly suitable for noise reduction in charging stations in residential areas. In addition, the fire-resistant sound-absorbing component 200 also provides fire protection, improving the safety of the charging station during use.

[0119] The aforementioned high-performance fireproof, noise-reducing, and sound-insulating composite panel 10, with the fireproof sound-absorbing component 200 and damping component 300 sequentially arranged within the cavity 110, effectively avoids direct exposure of the fireproof sound-absorbing component 200 and damping component 300 to the outside, thus preventing damage to the fireproof sound-absorbing component 200 and damping component 300 from adverse external environments and improving their service life. (The text then repeats "narrowing the anechoic zone 500" several times.)

[0120] The following are some specific examples. When %, it refers to a percentage by weight. It should be noted that the following examples do not exhaustively list all possible scenarios, and unless otherwise specified, the materials used in the examples are commercially available.

[0121] Example 1

[0122] Materials preparation: Fireproof sound-absorbing parts: Mix 35kg of trifunctional polyether polyol, 12kg of difunctional polyether polyol, 25kg of isocyanate, 8kg of tert-butylated phenyl phosphate flame retardant, 4kg of magnesium hydroxide, 5kg of aluminum hydroxide, 5kg of ammonium octamolate, 13kg of expandable graphite, 12kg of melamine phosphate, 0.15kg of catalyst, 0.5kg of cell opener, 0.5kg of foam stabilizer, and 0.5kg of foaming agent, then inject the mixture into a mold and cure to obtain a semi-rigid foam polyurethane sound-absorbing sheet. Cut the sheet into 33mm thick, shaped fireproof sound-absorbing parts using a slitting machine to obtain a semi-rigid polyurethane composite board with a cell opening rate of 50%, ready for use.

[0123] Damping component: Mix and cure 50 parts of polyurethane prepolymer, 0.1 parts of catalyst, 1 part of flame retardant, 5 parts of expandable graphite, 10 parts of barium titanate, 3 parts of mica sheet, 3 parts of vermiculite, and 3 parts of aluminum powder to obtain modified high-elasticity damping coating component A for later use.

[0124] Next, the modified high-elasticity damping coating component A is mixed with 5 parts of isocyanate and applied to the bottom of the cavity inside the bottom shell to form a 2mm thick modified high-elasticity damping coating inside the cavity, wherein the width of the cavity is 48mm. Then, the fireproof sound-absorbing component is bonded to the modified high-elasticity damping coating. Finally, the bottom shell is fastened to the panel (open area ratio 25%). A first bend is formed on one side of the bottom shell, and a second bend is formed on the side of the bottom shell facing the panel. The second bend is fastened to the first bend through the buffer pad, thereby obtaining a high-performance fireproof noise reduction and sound insulation composite board.

[0125] Example 2

[0126] Materials preparation: Fireproof sound-absorbing parts: Mix 35kg of trifunctional polyether polyol, 12kg of difunctional polyether polyol, 25kg of isocyanate, 8kg of tert-butylated phenyl phosphate flame retardant, 4kg of magnesium hydroxide, 5kg of aluminum hydroxide, 5kg of ammonium octamolate, 13kg of expandable graphite, 12kg of melamine phosphate, 0.16kg of catalyst, 0.75kg of cell opener, 0.75kg of foam stabilizer, and 0.5kg of foaming agent, then inject the mixture into a mold and cure to obtain a semi-rigid foam polyurethane sound-absorbing sheet. Cut the sheet into 35mm thick, shaped fireproof sound-absorbing parts using a slitting machine to obtain a semi-rigid polyurethane composite board with a cell opening rate of 60%, ready for use.

[0127] Damping component: Mix and cure 55 parts of polyurethane prepolymer, 0.3 parts of catalyst, 5 parts of flame retardant, 6 parts of expandable graphite, 10 parts of barium titanate, 4 parts of mica sheet, 3 parts of vermiculite, and 4 parts of aluminum powder to obtain modified high-elasticity damping coating component A for later use.

[0128] Next, 8 parts of modified high-elasticity damping coating and isocyanate are mixed and applied to the bottom of the cavity inside the bottom shell to form a 5mm thick modified high-elasticity damping coating inside the cavity, wherein the width of the cavity is 55mm. Then, fireproof sound-absorbing components are bonded to the modified high-elasticity damping coating to obtain a semi-rigid polyurethane composite board. Finally, the bottom shell is fastened to the panel (open area ratio of 35%), wherein a first bending part is formed on one side of the bottom shell and a second bending part is formed on the side of the bottom shell facing the panel. The second bending part is fastened to the first bending part through the buffer pad to obtain a high-performance fireproof noise reduction and sound insulation composite board.

[0129] Example 3

[0130] Materials preparation: Fireproof sound-absorbing parts: Mix 40kg of trifunctional polyether polyol, 15kg of difunctional polyether polyol, 30kg of isocyanate, 10kg of tert-butylated phenyl phosphate flame retardant, 3kg of magnesium hydroxide, 3kg of aluminum hydroxide, 3kg of ammonium octamolate, 15kg of expandable graphite, 15kg of melamine phosphate, 0.16kg of catalyst, 1.0kg of cell opener, 1.0kg of foam stabilizer, and 0.5kg of foaming agent, then inject the mixture into a mold and cure to obtain a semi-rigid foam polyurethane sound-absorbing sheet. Cut the sheet into 34mm thick, shaped fireproof sound-absorbing parts using a slitting machine to obtain a semi-rigid polyurethane composite board with a cell opening rate of 70%, ready for use.

[0131] Damping component: Mix and cure 60 parts of polyurethane prepolymer, 0.8 parts of catalyst, 8 parts of flame retardant, 10 parts of expandable graphite, 10 parts of barium titanate, 5 parts of mica sheet, 5 parts of vermiculite, and 5 parts of aluminum powder to obtain modified high-elasticity damping coating component A for later use.

[0132] Next, 10 parts of modified high-elasticity damping coating and isocyanate are mixed and applied to the bottom of the cavity inside the bottom shell to form a 3mm thick modified high-elasticity damping coating inside the cavity, wherein the width of the cavity is 50mm. Then, the fireproof sound-absorbing component is bonded to the modified high-elasticity damping coating. Finally, the bottom shell is fastened to the panel (opening ratio of 30%). A first bending part is formed on one side of the bottom shell, and a second bending part is formed on the side of the bottom shell facing the panel. The second bending part is fastened to the first bending part through the buffer pad to obtain a high-performance fireproof noise reduction and sound insulation composite board.

[0133] Comparative Example 1

[0134] The difference from Example 2 lies in the formulation of the fireproof sound-absorbing component. In Comparative Example 1, 35 kg of trifunctional polyether polyol, 12 kg of difunctional polyether polyol, 25 kg of isocyanate, 8 kg of tert-butylated phenyl phosphate flame retardant, 4 kg of magnesium hydroxide, 5 kg of aluminum hydroxide, 5 kg of ammonium octamolate, 13 kg of expandable graphite, 12 kg of melamine phosphate, 0.15 kg of catalyst, 0.2 kg of opening agent, 0.35 kg of foam stabilizer, and 0.5 kg of foaming agent were mixed and injected into a mold for curing to obtain a semi-rigid foam polyurethane sound-absorbing sheet. The sheet was then cut into fireproof sound-absorbing components with a thickness of 35 mm and a specific shape using a slitting machine. The resulting semi-rigid polyurethane composite board had an opening rate of 30% and was used for later use; the rest remained unchanged.

[0135] Comparative Example 2

[0136] The difference from Example 2 lies in the formulation of the fireproof sound-absorbing component. In Comparative Example 2, 35 kg of trifunctional polyether polyol, 12 kg of difunctional polyether polyol, 25 kg of isocyanate, 8 kg of tert-butylated phenyl phosphate flame retardant, 4 kg of magnesium hydroxide, 5 kg of aluminum hydroxide, 5 kg of ammonium octamolate, 13 kg of expandable graphite, 12 kg of melamine phosphate, 0.175 kg of catalyst, 1.2 kg of opening agent, 1.0 kg of foam stabilizer, and 0.55 kg of foaming agent were mixed and injected into a mold for curing to obtain a semi-rigid foam polyurethane sound-absorbing sheet. The sheet was then cut into fireproof sound-absorbing components with a thickness and shape of 35 mm using a slitting machine, resulting in a semi-rigid polyurethane composite board with a 100% opening rate for later use; the rest remained unchanged.

[0137] Comparative Example 3

[0138] The difference from Example 2 is that the modified high-elasticity damping coating was not applied inside the cavity, i.e., no damping element was set inside the cavity in Comparative Example 3, but everything else remained the same.

[0139] Comparative Example 4

[0140] The difference from Example 2 is that the width of the cavity is 45mm, that is, the width of the cavity in Comparative Example 4 is 45mm, and the rest remains the same.

[0141] Comparative Example 5

[0142] The difference from Example 2 is that the width of the cavity is 60mm, that is, the width of the cavity in Comparative Example 5 is 60mm, and the rest remains the same.

[0143] Comparative Example 6

[0144] The difference from Example 2 is that the structure of the panel is different. Specifically, the opening ratio of the panel in Comparative Example 6 is 20%, while the rest remain the same.

[0145] Comparative Example 7

[0146] The difference from Example 2 is that the structure of the panel is different. Specifically, the opening ratio of the panel in Comparative Example 7 is 40%, while the rest remain the same.

[0147] Comparative Example 8

[0148] The difference from Example 2 is that the structure of the panel is different. Specifically, the through holes on the panel of Comparative Example 8 are divided into multiple horizontal inflow holes, multiple downward tilting holes, and multiple upward tilting holes, while the rest remain unchanged.

[0149] Comparative Example 9

[0150] The difference from Example 2 lies in the structure of the panel and the structure of the damping component. Specifically, the through holes on the panel of Comparative Example 9 are divided into multiple horizontal inflow holes, multiple downward inclined holes, and multiple upward inclined holes. Furthermore, the position of the modified high-elasticity damping coating applied to the bottom of the cavity of the bottom shell is different. Specifically, Comparative Example 9 applies the modified high-elasticity damping coating to the surrounding cavity walls of the cavity of the bottom shell, and controls the coating height of the modified high-elasticity damping coating on the surrounding cavity walls so that the first and second connecting parts of the formed damping component occupy 2 / 3 of the width of the fireproof sound-absorbing component.

[0151] The high-performance fireproof, noise-reducing, and sound-insulating composite boards of Examples 1-3 and Comparative Examples 1-9 were tested for sound absorption coefficient, fire resistance, and weather resistance, and the experimental data are shown in Table 2 below:

[0152] The sound absorption coefficient was tested according to GB / T20247-2006; the fire resistance performance was tested according to GB23864-2009; and the weather resistance performance was tested according to GB / T11547-2008.

[0153] Table 2

[0154]

[0155] As can be seen from the comparison between Examples 1-3 and Comparative Examples 1-2 in Table 2, when the opening ratio of the semi-rigid polyurethane composite board obtained by the fireproof sound-absorbing component in Examples 1-3 is 50%-70%, the sound absorption coefficient of the high-performance fireproof noise reduction and sound insulation composite board at 1000Hz is significantly better than that of Comparative Examples 1-2. Furthermore, the weather resistance and back temperature of flame measurement at 1000℃ of Examples 1-3 are significantly better than those of Comparative Examples 1-2.

[0156] As can be seen from the comparison between Example 2 and Comparative Example 3 in Table 2, since Comparative Example 3 does not have a damping component, its sound absorption coefficient, weather resistance, and back temperature measured by flame at 1000°C are all lower than those of Example 2.

[0157] As can be seen from the comparison between Examples 1-3 and Comparative Examples 4-5 in Table 2, when the cavity width of Examples 1-3 is 48mm-55mm, and the thickness of the fireproof sound-absorbing component is 33mm-35mm, and the thickness of the damping component is 2mm-6mm, the sound absorption coefficient of Examples 1-3 is better than that of Comparative Examples 4-5.

[0158] As can be seen from the comparison between Examples 1-3 and Comparative Example 7 in Table 2, since the opening ratio of the panels of Examples 1-3 is in the range of 25%-35%, the sound absorption coefficient of Examples 1-3 is better than that of Comparative Example 7.

[0159] As can be seen from the comparison between Example 2 and Comparative Example 8 in Table 2, the sound absorption coefficient of Comparative Example 8 is better than that of Example 2 because the through holes of the panel of Comparative Example 8 are divided into multiple horizontal inflow holes, multiple downward tilting holes and multiple upward tilting holes.

[0160] As can be seen from the comparison between Comparative Example 8 and Comparative Example 9 in Table 2, since Comparative Example 9 further limits the first and second connecting parts of the damping component to occupy 2 / 3 of the width of the fireproof sound-absorbing component, the sound absorption coefficient of Comparative Example 9 is better than that of Comparative Example 8.

[0161] The high-performance fireproof, noise-reducing, and sound-insulating composite panels obtained in Examples 1-3 and Comparative Examples 1-9 were installed in the mounting frame to form a protective noise-reducing barrier. These panels were then applied to charging stations in residential areas for noise testing, and the experimental data are shown in Table 3 below.

[0162] The noise testing standards are as follows: In accordance with the provisions of the "Emission Standard for Environmental Noise at the Boundary of Industrial Enterprises", the "Emission Standard for Environmental Noise in Social Life" and the "Environmental Quality Standard for Noise GB3096-2008", the charging station should meet the minimum Class 2 urban noise standard of 60dB(A) during the day and 50dB(A) at night to obtain the center frequency of the noise inside the high-performance fireproof noise reduction and sound insulation composite panel.

[0163] Table 3

[0164]

[0165] As can be seen from Table 3, the noise reduction of Comparative Examples 8-9 is significantly better than that of Examples 1-3 and Comparative Examples 1-7, with Comparative Example 9 showing the best noise reduction effect.

[0166] The embodiments described above are merely illustrative of several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A high-performance fireproof noise-reducing soundproof composite board, characterized in that, The device includes a metal plate, a fireproof sound-absorbing component, and a damping component. A cavity is formed inside the metal plate, and a sound-absorbing channel is formed on the first sidewall of the cavity. The sound-absorbing channel is connected to the cavity. The fireproof sound-absorbing component and the damping component are sequentially disposed inside the cavity. The fireproof and sound-absorbing component is a semi-rigid polyurethane composite board. The damping component is a modified high-elasticity damping coating, and the damping component and the fireproof sound-absorbing component are attached and abutted against each other; The modified highly elastic damping coating comprises the following parts by weight: 50-60 parts of polyurethane prepolymer; 5 to 10 parts isocyanate; Catalyst 0.1 to 1 part; 1 to 10 parts flame retardant; 5 to 10 parts expandable graphite; 5 to 10 parts of piezoelectric material; 3 to 15 parts of flake-shaped filler; The piezoelectric material is barium titanate; The flake-like filler comprises a mixture of mica flakes, vermiculite, and aluminum powder; The mica sheet is in the form of 1 to 5 parts by weight, the vermiculite is in the form of 1 to 5 parts by weight, and the aluminum powder is in the form of 1 to 5 parts by weight. The metal plate includes a front panel and a back panel. The back panel has a cavity formed inside it. The back panel is detachably connected to the front panel, and the front panel has a sound-absorbing channel.

2. The high performance fire resistant, noise reducing, soundproofing composite panel of claim 1, wherein, The semi-rigid polyurethane composite board comprises the following parts by weight: 30-40 parts of trifunctional polyether polyol; 10 to 15 parts of 2-functionality polyether polyol; 20 to 30 parts isocyanate; 11 to 25 parts of liquid flame retardant; 3 to 15 parts of powder flame retardant; 10 to 15 parts expandable graphite; Catalyst: 0.15 to 0.5 parts; 0.5 to 1.0 parts of pore-opening agent; Foam stabilizer 0.5 to 1.0 parts; Foaming agent: 0.5 to 1.0 parts.

3. The high performance fire resistant, noise reducing, soundproofing composite panel of claim 1, wherein, The fireproof sound-absorbing component has multiple wavy bends on the side facing the sound-absorbing channel.

4. The high performance fire resistant, noise reducing, soundproofing composite panel of claim 1, wherein, Density of the fireproof sound-absorbing member is less than or equal to 100 kg / m 3 Thickness is less than or equal to 50 mm, and foam porosity is 50% to 70%.

5. The high performance fire resistant, noise reducing, sound deadening composite panel of claim 1, wherein, The fireproof, noise-reducing, and sound-insulating composite panel also includes a buffer pad, which is disposed between the panel and the bottom shell.

6. The high-performance fireproof noise-reducing soundproof composite board according to claim 5, characterized in that, The panel has a first bend on the side facing the bottom shell, and the bottom shell has a second bend on the side facing the panel. The second bend is fastened to the first bend via the buffer pad.

7. A protective noise barrier, characterised in that, The device includes an installation frame and a high-performance fireproof, noise-reducing, and sound-insulating composite panel as described in any one of claims 1 to 6. The number of the high-performance fireproof, noise-reducing, and sound-insulating composite panels is multiple, and each of the high-performance fireproof, noise-reducing, and sound-insulating composite panels is arranged sequentially on the installation frame. Furthermore, each of the high-performance fireproof, noise-reducing, and sound-insulating composite panels is detachably connected to the installation frame.

8. A charging station, characterized in that Including the protective noise reduction barrier as described in claim 7.

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