RU52877U1 - HEAT AND SOUND MULTILAYER PANEL - Google Patents

Abstract

The heat and sound insulating multilayer panel consists of several layers, each of which contains metal sheets and a filler located between them, the filler is made in the form of a corrugated sheet, which is a series of zigzags with alternating depressions and peaks. In order to increase the efficiency of the heat and sound insulation panel, a set of materials with a sharp difference in impedance can be used in it. The heat and sound insulation multilayer panel allows to increase the heat and sound insulation characteristics due to the use of many transitions between materials of different densities (different impedances). It also allows you to create combined acoustic panels, the first layer is sound absorbing, the second is sound insulating.

Description

The utility model relates to the field of building structures and structures.

Currently, porous sound-absorbing materials are widely used as fillers for heat and sound insulating panels. As such materials, cork, basalt and glass fiber, mineral wool plates, various foams, etc. are used. The use of these materials as a filler for a heat and sound insulating panel provides a wide range of sound absorption (Bogolepov I.I. Industrial soundproofing. - L .: Shipbuilding. 1986. - 368 p.).

However, structures consisting of two metal sheets and a filler located between them based on porous sound-absorbing materials have a number of technological and operational disadvantages. They are sensitive to dust, soot and moisture, poorly cleaned; caking over time; have a relatively large weight, often unsafe for the environment. Designs based on porous sound-absorbing materials have low strength and stiffness, and therefore are not power elements. Many basalt and fiberglass are harmful to human health. A big disadvantage of such structures is their low vibration resistance and low resource.

A known construction based on honeycomb, selected as a prototype. Honeycomb heat and sound insulation structures are three-layer structures consisting of two metal sheets and a honeycomb core located between them (Patent No. 610956, IPC E 04 B 1/74, published June 15, 1978, Bulletin No. 22). From the point of view of acoustics, the use of honeycomb structures provides significantly greater sound insulation and

sound absorption in a limited frequency range than in the case of sound absorbing materials.

The disadvantage of the prototype is its high cost, due to the complex manufacturing technology, as well as low technological flexibility for changes for the parameters of heat and sound insulation of material properties and the geometric parameters of cellular heat and sound insulation panels. For almost every type of filler material (metal: steel, aluminum, brass, copper, titanium, etc .; paper: plain, laminated; plastic: fiberglass, carbon fiber, etc.) requires its own technology and its own unique technological equipment, it is almost impossible to manufacture cellular heat and sound insulating panels from a combination of materials, for example, aluminum - steel, titanium - steel, aluminum - composite material. There are big problems associated with the removal of condensate from cellular heat and sound insulation panels. Currently, cellular structures are mainly used in aviation and astronautics (from metal foil and glass - carbon fiber, where the cost is not critical). The use of cellular heat and sound insulation panels in other areas is very modest - only paper honeycomb structures are used as the cheapest in technology, but they also have significant geometry limitations.

From the point of view of acoustics, the use of honeycomb structures is also limited by the fact that they have a relatively narrow range of effective sound insulation, therefore, to reduce noise of a broadband nature, their use is inefficient.

The utility model is based on the task of increasing the efficiency of a heat and sound insulating panel while reducing its cost.

The problem is solved due to the fact that the heat and sound insulation multilayer panel consists of several layers, each of which contains

metal sheets and a filler located between them, according to a utility model, that the filler is made in the form of a corrugated sheet, which is a series of zigzags with alternating depressions and peaks. In order to increase the efficiency of the heat and sound insulation panel, a set of materials with a sharp difference in impedance can be used in it.

This heat and sound insulation panel is illustrated by drawings.

Figure 1 shows the design of a two-layer heat and sound insulation panel.

Figure 2 shows the design of a two-layer heat and sound insulating panel using materials that differ sharply in impedance to increase the efficiency of the panel.

The panel includes metal sheets 1, 2, 3 and a filler in the form of a spatially folded structure 4, 5. As a material characterized by impedance, isolon 6, 7, 8, 9 can be used (Fig. 2).

The proposed design retains almost all the advantages of a honeycomb core (light weight, strength, rigidity, etc.), but dramatically reduces the cost of heat and sound insulation panels, especially metal ones, due to a simpler manufacturing technology. When using a spatially folded filler instead of honeycombs, the range of effective sound insulation is expanded, since, in contrast to the honeycomb case, there are no resonators with a fixed cavity height, and the resonator height variability (both in the transverse and longitudinal directions) should smooth out the sharp peak of noise attenuation at the resonant frequency therefore, according to the range of effective sound insulation, the inventive heat and sound insulation panel is not inferior to panels based on porous sound-absorbing materials.

One of the most important advantages of a filler in the form of a spatially folded structure is the high flexibility of thermal and sound insulation characteristics due to changes in the geometric parameters of the structure based on this filler, which are much easier, cheaper and faster to change in view of simple and cheap equipment. The second advantage is a wide selection of materials used.

When creating a two and three-layer structure using sheet material, this structure acquires rigidity. If at least 30% of the corrugation tops are attached to the sheet material on one or two sides, then the stiffness obtained allows using the structure as a structural material capable of bearing distributed loads of up to 0.5 kg / cm ² Thus, the claimed design due to the high rigidity of the aggregate spatially-folded structure can be used as a power structure, that is, to be part of a building or structure (wall, ceiling, floor, etc.).

The design has the same characteristics and resistance to weathering, which ensures a high resource of the structure. It is resistant to dirt, moisture, soot, etc. The spatially pleated aggregate structure has natural channels that allow condensate to be removed. The use of metallic materials allows the use of panels in a wide range of temperatures and highly aggressive environments. This property is important for the use of panels in the exhaust devices of gas turbine plants. To increase the effectiveness of thermal and acoustic insulation of the panel, the contact area of the spatially folded structure with metal sheets is no more than 2% of the total area. The spatially folded structure is high-tech, which allows for flexibility in the choice of geometric parameters, and also greatly extends the range

materials used. All this helps to provide the necessary heat and sound insulation characteristics at low cost. It is important that the inventive heat and sound insulation panel has a high ecology of production and operation.

The multilayer panels allows you to increase the heat and sound insulating characteristics through the use of many transitions between materials of different densities (different impedances). It also allows you to create combined acoustic panels, the first layer is sound absorbing, the second is soundproof.

The inventive heat and sound insulation panel has the following characteristics:

- Sound insulation index - 36 ... 42 dB

- Resource - at least 30 years

- Range of effective sound insulation - 100 ... 10000 Hz

- The cost of aggregate is 5 times cheaper than cellular structures, 25% cheaper than porous sound-absorbing materials.

Claims (2)

1. Heat and sound insulating multilayer panel, consisting of several layers, each of which contains metal sheets and a filler located between them, characterized in that the filler is made in the form of a corrugated sheet, which is a series of zigzags with alternating depressions and peaks. 2. The heat and sound insulation multilayer panel according to claim 1, characterized in that between the metal sheets and the filler there is a gasket made of a material with a difference in impedance, for example, from isolon.