RU156734U1 - ACOUSTIC SCREEN - Google Patents

Abstract

1. An acoustic screen containing a frame and horizontally mounted panels with a sound-absorbing coating, characterized in that the panels are mounted with the possibility of synchronous rotation relative to the frame at an angle of 45-90 ° to the horizontal and have a cross-sectional shape with upper and lower protrusions, providing when closed, overlap adjacent panels in the direction perpendicular to the screen plane. 2. An acoustic screen according to claim 1, characterized in that shielding pads are fixed to the upper and lower protrusions of the panels.

Description

The utility model relates to devices for protection against the effects of noise, sound waves and their suppression and can be used in building structures to ensure a normal acoustic regime, in particular, in protective screens to reduce noise near gas stations, where special requirements for fire safety are imposed.

Known modular soundproofing acoustic panel soundproofing screen (EP 0368135, E01F 8/00, E04B 1/82, 1989), intended for use in the open air, comprising a housing formed by a steel frame, tightly adjacent to it from the back with an insulating plate and a front grill panel, and a multilayer structure built into the housing, consisting of layers of fiberglass and glass wool with different densities directly adjacent to each other. The front grill panel is formed by a combination of thin strips of sheet iron arranged horizontally parallel to each other. The strips in cross section have a wing-shaped shape, their flat part is located obliquely with respect to the plane of the frame. A soundproofing plate placed on the opposite side is made of pressed wood and cement, coated on the outside with oil paint / resin.

The disadvantage of such an acoustic panel is not high enough protection against noise, because The soundproofing properties of the panel material are mainly used, as well as the creation of a windproof (unventilated) zone in front of the screen and in the acoustic shadow area. This limits the scope of such screens, for example, near gas stations due to violation of fire safety requirements.

The utility model solves the problem of increasing the efficiency of protection against noise and at the same time expanding the area of use of noise-absorbing screens by creating a ventilated area adjacent to the acoustic screen.

This is achieved by the fact that in an acoustic screen containing a frame and horizontally mounted panels with a sound-absorbing coating on it, the panels are mounted with the possibility of synchronous rotation relative to the frame at an angle of 45-90 degrees and have a cross-sectional shape with upper and lower protrusions, providing in the closed position overlapping adjacent panels in a direction perpendicular to the plane of the screen. On the upper and lower ledges of the panels can be fixed shielding pads.

The ability to rotate the panels relative to the frame allows the formation of gaps between the horizontal joints of the panels. In this position, the acoustic screen acts as an aerodynamic plate silencer and provides not only the absorption of energy from sound waves flowing around the sound-absorbing surfaces of the panels, but also the ventilation of territorial areas near the screen.

The slope of the panels is recommended to be selected in the range from 45 to 90 degrees to the horizon in order to form the direction of propagation of the transmitted noise in this range and to limit the penetration of noise into the acoustic shadow zone.

Shielding pads, overlapping horizontal joints between the panels, additionally serve as sound insulators when working in screen mode.

The utility model is illustrated by drawings, where in FIG. 1 shows a general view; FIG. 2 is a view A of FIG. 1, in FIG. 3 is a section B-B of FIG. 1, panels in the folded state, in FIG. 4 is a section BB of FIG. 2, the panels are tilted, in FIG. 5 is a view B of FIG. one).

The acoustic screen consists of a rectangular frame 1, inside of which are horizontally located two-sided sound-absorbing panels 2 and 3 with shielding plates 4, axles 5 and rollers 6 fixed on them, located on the same axis, connecting the articulated panels to the frame, mounted on the rollers 6 of the levers 7, articulated by a hinge 8 with a rod 9 equipped with a handle 10.

An acoustic screen mounted in a vertical plane between the noise source and the protected area works in two modes: screen and silencer mode.

When operating in the on-screen mode (Fig. 3), panels 2 and 3 are located close to the frame and to each other in the plane of the frame. The cross-sectional shape of these panels is profiled so that in such a position they overlap each other, for example, due to inclined (between frame 1 and panels 2) and stepped (between panels) surfaces. Additionally, the role of sound insulators is performed by shielding pads 4 overlapping the horizontal joints between the panels. In this mode, the acoustic screen works just like a screen.

When operating in the muffler mode (Fig. 4), panels 2 and 3 are positioned obliquely to the horizon so that the sound-absorbing surfaces of panels 2 and 3 are blown by air currents, therefore, provide energy absorption of sound waves. The slope of the panels is recommended to be selected in the range from 45 to 90 degrees to the horizon in order to form the direction of propagation of the transmitted noise in this range of angles and to limit the penetration of noise into the acoustic shadow zone. In this position of the panels, the acoustic screen acts as an aerodynamic plate muffler. In this case, gaps are formed between the horizontal joints of panels 2 and 3, which ensure the ventilation mode of the nearby territory.

For the simultaneous rotation of panels 2 and 3, the acoustic screen is equipped with a panel rotation mechanism, for example, in the form of levers 7 mounted on rollers 6, articulated by a hinge 8 with a rod 9 having a handle 10 (Fig. 5). Moving the handle 10 downward provides simultaneous rotation of the panels in the desired direction. The noise reduction efficiency when operating in this mode is reduced, but remains sufficient to ensure acceptable norms of sound pressure levels in the adjacent area in the area of acoustic shade and to ventilate the area, solving the problem of increasing fire and explosion safety when installed near gas stations. The proposed acoustic screen can be used as an integral part (module) of conventional sound-absorbing screens.

Frame 1 and shielding pads 4 can be made of any sufficiently strong material (steel, basalt-polymer plastic, etc.), panels 2 and 3 are multilayer using soundproofing material (steel, fiberglass, basalt-polymer plastic, etc.) and fixed with two sides on the frame of sound-absorbing plates (for example, made of closed-cell polyethylene foam, polyurethane foam), which ensures the implementation of sound absorption and sound insulation to increase the efficiency of the acoustic screen.

The use of the inventive acoustic screen increases the scope of sound-absorbing screens, while providing the necessary effectiveness of protection against noise and ventilation of the area adjacent to the acoustic screen.

Claims (2)

1. An acoustic screen containing a frame and horizontally mounted panels with a sound-absorbing coating, characterized in that the panels are mounted with the possibility of synchronous rotation relative to the frame at an angle of 45-90 ° to the horizontal and have a cross-sectional shape with upper and lower protrusions, providing in the closed position, overlapping adjacent panels in the direction perpendicular to the plane of the screen. 2. The acoustic screen according to claim 1, characterized in that shielding pads are fixed to the upper and lower protrusions of the panels.

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