Composite sound absorption and insulation structure

Abstract

The utility model discloses a composite sound absorption and insulation structure which comprises a steel plate and a steel plate connecting hole plate, sound absorption cotton is arranged in the steel plate, a damping layer is arranged between the sound absorption cotton and the steel plate, the damping layer is tightly attached to the inner wall of the outer layer of the steel plate, the composite sound absorption and insulation structure comprises a first steel plate, the first steel plate is hollow, and a first installation groove is formed in one side wall of the first steel plate. A first hole plate is arranged on the inner side of the first mounting groove, the first hole plate and a first steel plate are welded and formed, the first hole plate is an outer protective face metal hole plate, first sound absorption cotton is arranged in a cavity in the first steel plate, the sound insulation effect can be achieved through the first sound absorption cotton, and a first damping layer is arranged on the portion, located on the outermost layer of the first steel plate, of the first sound absorption cotton. The first damping layer is a honeycomb damping fin, the honeycomb damping fin is tightly attached to the inner wall of the first steel plate and fully attached to the first steel plate, the strength of the first steel plate can be improved, vibration of the first steel plate is restrained, and therefore the sound insulation index of the first steel plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction engineering, in particular to a composite sound absorbing and insulating structure. Background Art

[0002] The composite sound-absorbing and sound-insulating modules used in noise reduction projects have a thinner outermost steel plate and higher medium and low-frequency noise from the noise source. When the noise passes through the steel plate, it will cause the steel plate to vibrate. This vibration will reduce the sound insulation of the plate itself, thereby affecting the noise reduction effect of the entire project. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a composite sound-absorbing and insulating structure, including a steel plate, the steel plate is connected to a perforated plate, sound-absorbing cotton is arranged inside the steel plate, a damping layer is arranged between the sound-absorbing cotton and the steel plate, and the damping layer is closely attached to the outermost inner wall of the steel plate.

[0004] Preferably, the perforated plate is an outer protective metal perforated plate.

[0005] Preferably, the damping layer is a honeycomb damping sheet.

[0006] Preferably, the steel plate is a first steel plate, the first steel plate is hollow, a first installation groove is opened on one side wall of the first steel plate, a first orifice plate is arranged inside the first installation groove, and the first orifice plate is welded to the first steel plate.

[0007] Preferably: a first sound-absorbing cotton is arranged in the cavity inside the first steel plate.

[0008] Preferably: a first damping layer is provided between the first sound-absorbing cotton and the outermost layer of the first steel plate.

[0009] Preferably, the steel plate is a second steel plate, the second steel plate is hollow, a second installation groove is opened on one side wall of the second steel plate, a second orifice plate is arranged inside the second installation groove, and the second orifice plate is welded to the second steel plate.

[0010] Preferably: a second sound-absorbing cotton is arranged in the cavity inside the second steel plate.

[0011] Preferably: the second sound-absorbing cotton is located between the outermost layers of the second steel plate and a second damping layer is provided.

[0012] Preferably, the inner side wall of the second steel plate is provided with a plurality of convex ribs, and a gap is provided between two adjacent convex ribs.

[0013] Technical effects and advantages of the utility model:

[0014] In the utility model, the honeycomb damping sheet is closely attached to the inner wall of the second steel plate and fully fits the second steel plate, so as to improve the strength of the second steel plate and suppress its vibration, thereby improving its sound insulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the composite sound-absorbing and sound-insulating structure provided in Example 1 of the present application;

[0016] Figure 2 It is a structural schematic diagram of the composite sound-absorbing and sound-insulating structure provided in Example 2 of the present application.

[0017] In the figure: 1. first steel plate; 11. first mounting groove; 2. first orifice plate; 3. first sound-absorbing cotton; 4. first damping layer; 5. second steel plate; 51. second mounting groove; 52. convex rib; 6. second orifice plate; 7. second sound-absorbing cotton; 8. second damping layer. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

[0019] The present application provides a composite sound-absorbing and sound-insulating structure, comprising a steel plate, a steel plate connected to a perforated plate, sound-absorbing cotton arranged inside the steel plate, a damping layer arranged between the sound-absorbing cotton and the steel plate, the damping layer being closely attached to the inner wall of the outer layer of the steel plate,

[0020] See also Figures 1-2 In the present embodiment, the composite sound-absorbing and sound-insulating structure comprises a first steel plate 1, which is hollow, and a first mounting groove 11 is provided on one side wall of the first steel plate 1, and a first orifice plate 2 is provided inside the first mounting groove 11, and the first orifice plate 2 is welded to the first steel plate 1, and the first orifice plate 2 is an outer protective metal orifice plate, and a first sound-absorbing cotton 3 is provided in the cavity inside the first steel plate 1, and the first sound-absorbing cotton 3 can play a role in sound insulation, and the first sound-absorbing cotton 3 is located between the outermost layers of the first steel plate 1, and a first damping layer 4 is provided, and the first damping layer 4 is a honeycomb damping sheet, which is closely attached to the inner wall of the first steel plate 1 and fully fits the first steel plate 1, and can improve the strength of the first steel plate 1, suppress its vibration, and thus improve its sound insulation.

[0021] In another embodiment, a second steel plate 5 is included, the second steel plate 5 is hollow, a second installation groove 51 is opened on one side wall of the second steel plate 5, a second orifice plate 6 is arranged on the inner side of the second installation groove 51, the second orifice plate 6 is welded to the second steel plate 5, the second orifice plate 6 is an outer protective metal orifice plate, a second sound-absorbing cotton 7 is arranged in the cavity inside the second steel plate 5, and the second sound-absorbing cotton 7 can play a role in sound insulation, the second sound-absorbing cotton 7 is located between the outermost layers of the second steel plate 5, and a second damping layer 8 is arranged, the second damping layer 8 is a honeycomb damping plate, the honeycomb damping plate is tightly attached to the inner wall of the second steel plate 5, and is fully fitted with the second steel plate 5, which can improve the strength of the second steel plate 5 and suppress its vibration, thereby improving its sound insulation.

[0022] In this embodiment, a plurality of convex ribs 52 are provided on the inner wall of the second steel plate 5, and a gap is provided between two adjacent convex ribs 52. When the second damping layer 8 is placed inside the second steel plate 5, the two side walls of the second damping layer 8 squeeze the convex ribs 52. The convex ribs 52 can increase the friction force of the inner wall of the second steel plate 5 and reduce the relative movement between the second damping layer 8 and the second steel plate 5, thereby improving the sound insulation thereof.

[0023] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A composite sound-absorbing and sound-insulating structure, comprising a steel plate, the steel plate being connected to a perforated plate, and sound-absorbing cotton being arranged inside the steel plate, characterized in that: A damping layer is arranged between the sound-absorbing cotton and the steel plate, and the damping layer is closely attached to the outermost inner wall of the steel plate; The steel plate is a first steel plate (1), the first steel plate (1) is hollow, a first installation groove (11) is provided on one side wall of the first steel plate (1), a first orifice plate (2) is provided inside the first installation groove (11), and the first orifice plate (2) and the first steel plate (1) are welded together; A first sound-absorbing cotton (3) is arranged in the cavity inside the first steel plate (1); The first sound absorbing cotton (3) is located between the outermost layers of the first steel plate (1) and a first damping layer (4) is provided.

2. A composite sound-absorbing and sound-insulating structure according to claim 1, characterized in that: The perforated plate is an outer protective metal perforated plate.

3. A composite sound-absorbing and sound-insulating structure according to claim 2, characterized in that: The damping layer is a honeycomb damping sheet.

4. A composite sound-absorbing and sound-insulating structure according to claim 1, characterized in that: The steel plate is a second steel plate (5), the second steel plate (5) is hollow, a second installation groove (51) is provided on one side wall of the second steel plate (5), a second orifice plate (6) is provided inside the second installation groove (51), and the second orifice plate (6) and the second steel plate (5) are welded together.

5. A composite sound-absorbing and sound-insulating structure according to claim 4, characterized in that: A second sound-absorbing cotton (7) is arranged in the cavity inside the second steel plate (5).

6. A composite sound-absorbing and sound-insulating structure according to claim 5, characterized in that: The second sound absorbing cotton (7) is located between the outermost layers of the second steel plate (5) and a second damping layer (8) is provided.

7. A composite sound-absorbing and sound-insulating structure according to claim 6, characterized in that: The inner side wall of the second steel plate (5) is provided with a plurality of convex ribs (52), and a gap is provided between two adjacent convex ribs (52).

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