CN205279394U - Noise abatement static pressure case - Google Patents

Abstract

The utility model relates to a noise-eliminating static pressure box. It consists of an outer shell made of galvanized steel plate and an inner shell made of porous steel plate. On one side wall of the outer shell, an air inlet with the inner end penetrating to the inner cavity of the inner shell is installed on one side wall of the outer shell, and on the other side wall of the outer shell The upper seal is fixedly installed with an air outlet whose inner end penetrates to the inner cavity of the inner shell. The two side walls of the outer shell where the air inlet and air outlet are located are a set of non-opposite side walls; A sound-absorbing layer is provided between them, and the sound-absorbing layer covers at least the side wall opposite to the air inlet; the sound-absorbing layer includes a glass cloth layer wrapped outside the inner shell and a glass wool layer wrapped outside the glass cloth layer. The utility model provides a sound-absorbing static pressure box with simple and reasonable structural design, by installing an air inlet and an air outlet on a group of non-opposite side walls of the box body, and setting a The sound-absorbing layer made of glass cloth and glass wool improves the sound-absorbing ability of the plenum.

Description

A sound-absorbing static pressure box

technical field

The utility model belongs to the technical field of ventilating and air-conditioning system components for industrial and civil buildings, in particular to a noise-eliminating static pressure box.

Background technique

With the development of society, more and more commercial and civil buildings have been built, among which ventilation and central air-conditioning systems are indispensable. Considering the requirements of energy saving and environmental protection, the space of the air duct system needs to be designed as small as possible under the premise of satisfying people's working and living space as much as possible. The problem. In addition, in some office buildings that require a quiet environment, unreasonable pipeline design will generate relatively large noise, which has caused a huge impact on users. For example, in a large office building, due to the many floors, many rooms and the small space above the suspended ceiling, the air supply duct, return air duct, fresh air duct, and exhaust duct can be connected according to requirements through a static pressure box with noise reduction function, increasing the The high static pressure makes the wind blow farther while reducing noise.

Utility model content

In order to solve the technical problems in the known technology, the utility model provides a noise-absorbing static pressure box with a simple structure and solves the design problem. noise reduction.

The technical solution adopted by the utility model to solve the technical problems existing in the known technology is: a noise-absorbing static pressure box includes an outer shell made of galvanized steel plate and an inner shell made of porous steel plate, and a side wall of the outer shell The upper seal is fixedly installed with an air inlet with the inner end penetrating into the inner cavity of the inner shell, and the other side wall of the outer shell is sealed and fixed with an air outlet with the inner end penetrating into the inner cavity of the inner shell. The air inlet and the air outlet are located The two side walls of the outer shell are a set of non-opposite side walls; a sound-absorbing layer is provided between the outer shell and the inner shell, and the sound-absorbing layer covers at least the side wall opposite to the air inlet; the sound-absorbing layer It includes a glass cloth layer wrapped outside the inner casing and a glass wool layer wrapped outside the glass cloth layer.

The advantages and positive effects of the utility model are: the utility model provides a noise-absorbing plenum with a simple and reasonable structural design. The air inlet and outlet are installed, and a sound-absorbing layer made of glass cloth and glass wool is arranged on the side wall of the box body opposite to the air inlet, so as to improve the noise reduction ability of the static pressure box. The sound-absorbing static pressure box can convert part of the dynamic pressure into static pressure to make the wind blow farther, effectively reduce the noise through the sound-absorbing layer, and obtain uniform static pressure to reduce the loss of dynamic pressure; It can also be used as a universal joint for connecting pipes, which improves the convenience of building the ventilation system.

Preferably: the axes of the air inlet and the air outlet are perpendicular.

Preferably: the sound-absorbing layer covers each side wall of both the outer casing and the inner casing.

Preferably: the glass wool layer is made of centrifugal glass wool.

Description of drawings

Fig. 1 is a schematic diagram of the external structure of the utility model;

Fig. 2 is a schematic diagram of a half-section structure of the utility model.

In the figure: 1. Air inlet; 2. Air outlet; 3. Shell; 4. Glass wool layer; 5. Glass cloth layer; 6. Inner shell.

detailed description

In order to further understand the content of the invention, features and effects of the present utility model, the following examples are given in detail as follows:

Please refer to Fig. 1 and Fig. 2, the utility model includes an outer shell 3 made of galvanized steel plate and an inner shell 6 made of porous steel plate, and one side wall of the outer shell 3 is sealed and fixed with an inner end penetrating to the inner shell The air inlet 1 of the inner cavity of the body 6 is sealed and fixed on the other side wall of the outer shell 3, and the air outlet 2 whose inner end penetrates the inner cavity of the inner shell 6 is installed, and the outer shell where the air inlet 1 and the air outlet 2 are located The two side walls of 3 are a set of non-opposing side walls. The flow direction of the airflow changes when passing through the silencing plenum box. In this embodiment, the axes of the air inlet 1 and the air outlet 2 are set to be perpendicular.

A sound-absorbing layer is provided between the outer casing 3 and the inner casing 6 , and the sound-absorbing layer at least covers the side wall opposite to the air inlet 1 . In order to improve the sound attenuation effect, in this embodiment, a sound absorbing layer is provided to cover each side wall of both the outer casing 3 and the inner casing 6 .

The sound-absorbing layer includes a glass cloth layer 5 wrapped outside the inner casing 6 and a glass wool layer 4 wrapped outside the glass cloth layer 5 . In this embodiment, the glass wool layer 4 is made of centrifugal glass wool.

During the construction of the ventilation system, the noise-absorbing static pressure box is installed in the middle of the pipeline to convert part of the dynamic pressure into static pressure to make the wind blow farther, effectively reduce noise through the sound-absorbing layer, and obtain uniform static pressure output. Wind, reducing dynamic pressure loss. When the pipelines cross, the cost-eliminating and noise-absorbing static pressure box can be used instead of elbows, tees and other pipe fittings to improve the convenience of construction.

Claims (4)

1. A sound-absorbing static pressure box is characterized in that: an outer shell (3) comprising a galvanized steel plate material and an inner shell (6) of a porous steel plate material are sealed and fixed on a side wall of the outer shell (3). The air inlet (1) with the inner end penetrating into the inner cavity of the inner housing (6) is connected and installed, and the inner end penetrating into the inner housing (6) is sealed and fixed on the other side wall of the outer housing (3). The air outlet (2) of the cavity, the two side walls of the outer casing (3) where the air inlet (1) and the air outlet (2) are located are a group of non-opposite side walls; (6) There is a sound-absorbing layer between the two, and the sound-absorbing layer covers at least the side wall opposite to the air inlet (1); the sound-absorbing layer includes a glass cloth layer (5) covering the outer side of the inner casing (6) And the glass wool layer (4) wrapped on the outside of the glass cloth layer (5). 2. The sound-absorbing plenum box according to claim 1, characterized in that: the axes of the air inlet (1) and the air outlet (2) are perpendicular. 3. The sound-absorbing plenum box according to claim 1, characterized in that: the sound-absorbing layer covers each side wall of both the outer casing (3) and the inner casing (6). 4. The sound-absorbing plenum as claimed in claim 1, characterized in that: the glass wool layer (4) is made of centrifugal glass wool.