RU28500U1 - Soundproof and heat insulating panel - Google Patents

Description

Soundproof and heat insulating panel.

The utility model relates to construction and can be used in the construction of public and industrial buildings with internal sources of noise to improve acoustic comfort in the premises.

Currently, various sound-absorbing structures are used to ensure satisfactory acoustic conditions in Pshroko rooms.

A device is known for reducing the energy of acoustic vibrations, comprising a two-layer plate consisting of layers made of various materials (French Patent No. 744204, E 04 B 1/86, 1932). The disadvantage of this device is not a sufficient decrease in the energy of acoustic vibrations due to the small surface of the mass and rigid attachment to the surface.

A device is known for reducing the energy of acoustic vibrations, comprising a two-layer plate, the first layer of which is made with an energy loss coefficient of acoustic vibrations KI and the second layer is made with an energy loss coefficient of acoustic vibrations K2 KI, facing a solid surface, and the walls of one or more holes made in the first layer, covered with material with a coefficient of acoustic energy loss Kz KI (patent of the Russian Federation No. 2140498, IPC: E 04B 1/82, published. 10.27.99).

The disadvantage of this device is the complex technology, heavy weight, the selection of materials with a loss coefficient of acoustic vibrations that exceed the loss coefficient of acoustic vibrations of the first layer of a multilayer panel. This limits the choice of materials for successive layers.

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Known panel has low heat-insulating properties.

Known multilayer soundproof panel, consisting of several plates interconnected by elastic layers (USSR Author's Certificate No. 931899, MKI: E 04 B 1/84, 1982, prototype).

Such structures, while providing high sound insulation, have significantly less bending stiffness than single-layer fences of the same mass. Increasing the stiffness of the elastic layers to increase the overall stiffness of the structures simultaneously reduces its sound insulating properties.

This utility model eliminates the disadvantages of analogues and prototype.

The technical result of the utility model is to reduce the dimensions and weight of the soundproof panel, reduce acoustic vibrations to a predetermined level, ease of use, improve heat-insulating and vibration isolation, increase the manufacturability of the panel, assemble individual partitions and blocks for closed volumes.

The technical result is achieved by the fact that the soundproofing and heat-insulating panel, consisting of several plates interconnected by elastic layers, at least one of the plates is made of wood-fiber material, and the outer plate is made of cork, the layers are made of foam and / or permanently viscous vibration absorbing material.

The essence of the utility model is illustrated in FIG. 1 and FIG. 2.

Figure 1 shows a section of an element of a soundproofing and heat insulating panel, where: 1 - a plate of wood fiber

material q) e№eft or high density, for example, fiberboard, or MDF, or hardboard, 2 - an elastic layer of polyethylene foam or a constantly viscous vibration-absorbing material, 3 - an outer plate of cork coating. The outer plate 3 is a plate located outside element for the sound of the insulated room, it can be decorated as a decorative element.

Figure 2 presents the frequency characteristics of the sound insulation of a layered insulating panel. Position 4 denotes a curve for a sample of two layers. One of the layers is a fiberboard with a thickness of 7.5 mm, the second is a cork plate with a thickness of 4 mm. Curve 5 represents the sound insulation characteristic of a layered sound-absorbing panel, in which 1 a hardboard of a hardboard with a thickness of 3.2 mm, 2 is an elastic layer of permanently viscous vibration-absorbing material “energy flex 6 mm thick, 3 is an external plate of cork with a thickness of 4.2 mm.

All materials are environmentally friendly. The panel is water-resistant, designed to reduce noise in homes, offices, etc. by applying to the internal partitions: the walls of the toilet rooms (inside and in the adjacent living quarters), halls, hallways, corridors. The laminated panel brings the soundproofing of the rooms in the frequency range above 315 Hz to a level of at least 24 dB.

Possible execution of volumetric blocks. Elements of a layered soundproofing panel are made in the form of modules with grooves and protrusions along the ends and perimeter, which allows you to collect soundproof areas of any size in a short time.

The incident sound wave on the outer plate 1 of the sound insulating and heat insulating panel excites transverse and longitudinal deformations in it, which lead to bending vibrations of this plate 1. Through a viscous layer 2,

connecting the plate 1 with the next external plate 3, the longitudinal and transverse vibrations of the plate 1 are partially transmitted to this plate 3, causing bending vibrations in it, but of much smaller amplitude. These vibrations cause a sound wave to be emitted on the other side of the decorative extinct plate 3, but the amplitude of this wave will be substantially smaller.

Experiments have shown that optimal tephedel changes in the thickness of plates lie in the following limits:

-fibre material: 3-35mm;

-Cork: 3-8mm;

- the made foam polyethylene: 5-50mm;

-energoflex (or SKLG-25): 5-8mm.

If the crowd of layers choose less than the minimum values, then the effect of sound insulation is not observed. An increase in the upper values for thick slabs and for elastic layers leads to an increase in the weight of the modules and a slight gain in sound insulation compared to two-layer panels of other materials.

Claims (1)

Soundproof and heat-insulating panel, consisting of several plates interconnected by elastic layers, characterized in that at least one of the plates is made of wood fiber material, and the outer plate is made of cork, the elastic layers are made of polyethylene foam and / or permanently viscous vibration-absorbing material.