Double-layer metal cavity self-fluid foaming silencing static pressure box

Abstract

The utility model provides a double-layer metal cavity self-fluid foaming noise elimination plenum chamber which comprises a chamber body, an air inlet pipe, an air outlet pipe, a horn-shaped cylinder, an air guide plate and a noise elimination plate, an interlayer cavity is formed in each side wall of the chamber body, self-fluid foaming materials are filled in the interlayer cavity to form a uniform and compact noise elimination layer, and the noise elimination plate is arranged in the interlayer cavity. The air inlet pipe and the air outlet pipe are connected to the box body and are communicated with the space in the box body so as to guide air flow in and out of the box body, the large-caliber end of the horn-shaped cylinder is connected to the end, close to the box body, of the air inlet pipe and located in the box body, and the air guide plate is installed in the box body and spaced from the small-caliber end of the horn-shaped cylinder; the multiple silencing plates are installed in the box body and located between the air guide plate and the air outlet pipe at equal intervals. The double-layer metal cavity self-fluid foaming silencing plenum chamber can effectively isolate generation and transmission of noise and reduce the noise level.

Description

Technical Field

[0001] The utility model relates to the technical field of static pressure boxes, in particular to a double-layer metal cavity self-fluid foaming silencing static pressure box. Background Art

[0002] In the ventilation systems of construction projects and air conditioning projects, anechoic plenums are widely used. After the air enters the anechoic plenum, the speed slows down significantly, the wind noise is reduced, and the anechoic plenum converts the dynamic pressure of the air into static pressure, so that the wind blows farther and the air volume is distributed more evenly. The plenum is often used to control gas flow and noise generation. The noise control effect of traditional plenums is limited, especially in the silencing of high-frequency noise. Utility Model Content

[0003] In view of the above, the utility model provides a double-layer metal cavity self-fluid foaming silencing static pressure box to effectively isolate the generation and propagation of noise and reduce the noise level.

[0004] The technical solution of this utility model:

[0005] The utility model provides a double-layer metal cavity self-fluid foaming sound-absorbing static pressure box, comprising a box body, an air inlet pipe, an air outlet pipe, a horn, an air guide plate and a sound-absorbing plate. An interlayer cavity is formed in each side wall of the box body, and the interlayer cavity is filled with a self-fluid foaming material to form a uniform and dense sound-absorbing layer. The air inlet pipe and the air outlet pipe are both connected to the box body and communicated with the space inside the box body to guide the inlet and outlet of air in the box body. The end of the horn with a larger diameter is connected to the end of the air inlet pipe close to the box body and is located in the box body. The air guide plate is installed in the box body and is spaced apart from the end of the horn with a smaller diameter to guide the air flow in the horn to be dispersed to both sides of the air guide plate. A plurality of sound-absorbing plates are installed in the box body and are arranged at equal intervals between the air guide plate and the air outlet pipe.

[0006] Furthermore, the self-fluid foaming material is stored in a pressure bottle and is sprayed outward through a nozzle to fill the interlayer cavity.

[0007] Furthermore, the self-fluid foaming material is foamed phenolic or polyurethane.

[0008] Furthermore, the box body includes an outer shell, an inner shell and an end cover, the outer shell is sleeved outside the inner shell, the sandwich cavity is formed between the outer shell and the inner shell, and the end cover is fixed at both ends between the outer shell and the inner shell to seal the self-fluid foaming material filled in the sandwich cavity.

[0009] Furthermore, the box body includes end plates, which block the openings at both ends of the inner shell, and the air inlet pipe and the air outlet pipe are respectively connected to the two end plates.

[0010] Furthermore, the outer shell and the inner shell are formed by welding metal sheets.

[0011] Furthermore, the air guide plate is an arc-shaped plate, both ends of the arc-shaped plate are respectively fixed to an opposite inner wall of the box body, and an air flow channel is provided between the two sides of the arc-shaped plate and the other opposite inner wall of the box body.

[0012] Furthermore, the protruding portion of the arc-shaped plate is close to the air outlet end of the horn.

[0013] Furthermore, the sound-absorbing board includes a sound-absorbing shell and sound-absorbing cotton placed in the sound-absorbing shell, and the sound-absorbing shell is provided with a sound-absorbing hole.

[0014] Furthermore, the air inlet pipe includes a first pipe body and a first flange connected to one end of the first pipe body, and the air outlet pipe includes a second pipe body and a second flange connected to one end of the second pipe body.

[0015] Beneficial effects of the utility model:

[0016] Compared with the prior art, the double-layer metal cavity self-fluid foaming silencing static pressure box provided by the utility model has a horn, an air guide plate and a silencer plate arranged in sequence in the box body along the air flow direction, so that the airflow entering the horn from the air inlet pipe is intercepted and noise is reduced, which has a noise reduction and sound absorption effect on noise sound waves. The airflow coming out of the horn hits the air guide plate and is dispersed into two airflows, which enter between multiple silencers for silencing and then flow out from the air outlet pipe. The noise generated when the airflow flows in the box body is blocked by the self-fluid foaming material, reducing the noise from propagating outward. In this way, the generation and propagation of noise can be effectively isolated, and the noise level can be reduced.

[0017] The preferred implementation scheme of the utility model and its beneficial effects will be further described in detail in conjunction with specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the utility model and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the utility model, but should not constitute a limitation of the utility model.

[0019] Figure 1 It is a three-dimensional diagram of the double-layer metal cavity self-fluid foaming silencing static pressure box of the utility model;

[0020] Figure 2 It is a cross-sectional view of the double-layer metal cavity self-fluid foaming silencing static pressure box of the utility model.

[0021] Description of the accompanying drawings: box body 1, air inlet pipe 2, air outlet pipe 3, horn 4, air guide plate 5, silencer plate 6, self-fluid foaming material 7, outer shell 11, inner shell 12, end cover 13, end plate 14. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0023] See also Figure 1 and Figure 2 The utility model provides a double-layer metal cavity self-fluid foaming silencing static pressure box, including a box body 1, an air inlet pipe 2, an air outlet pipe 3, a horn 4, an air guide plate 5 and a muffler plate 6. An interlayer cavity is formed in each side wall of the box body 1, and the interlayer cavity is filled with a self-fluid foaming material 7 to form a uniform and dense muffler layer. The air inlet pipe 2 and the air outlet pipe 3 are both connected to the box body 1 and are connected to the space inside the box body 1 to guide the airflow in and out of the box body 1. The end of the horn 4 with a larger diameter is connected to the end of the air inlet pipe 2 close to the box body 1 and is located in the box body 1. The air guide plate 5 is installed in the box body 1 and is spaced apart from the end of the horn 4 with a smaller diameter to guide the airflow in the horn 4 to disperse to both sides of the air guide plate 5. A plurality of muffler plates 6 are installed in the box body 1 and are arranged at equal intervals between the air guide plate 5 and the air outlet pipe 3.

[0024] The double-layer metal cavity self-fluid foaming silencing static pressure box provided by the utility model has a horn 4, an air guide plate 5 and a muffler plate 6 arranged in sequence in the box body 1 along the air flow direction, so that the airflow entering the horn 4 from the air inlet pipe 2 is intercepted and noise is reduced, which has a noise reduction and sound absorption effect on noise sound waves, and the airflow coming out of the horn 4 impacts on the air guide plate 5 and is dispersed into two airflows, which enter between multiple muffler plates 6 for muffler respectively and then flow out from the air outlet pipe 3. The noise generated when the airflow flows in the box body 1 is blocked by the self-fluid foaming material 7, reducing the noise from propagating outward. In this way, the generation and propagation of noise can be effectively isolated, and the noise level can be reduced.

[0025] The self-fluid foaming material 7 is a material disclosed in the prior art, which is stored in a pressure bottle and sprayed out through a nozzle to fill the interlayer cavity. The self-fluid foaming material 7 can be a loose and porous material such as foamed phenolic, polyurethane, etc.

[0026] In this embodiment, the box body 1 includes an outer shell 11, an inner shell 12, an end cover 13 and an end plate 14. The outer shell 11 is sleeved outside the inner shell 12, and the interlayer cavity is formed between the outer shell 11 and the inner shell 12. The end cover 13 is fixed to both ends between the outer shell 11 and the inner shell 12 to block the self-fluid foaming material 7 filled in the interlayer cavity. The end plate 14 blocks the openings at both ends of the inner shell 12. The air inlet pipe 2 and the air outlet pipe 3 are respectively connected to the two end plates 14. The outer shell 11 and the inner shell 12 can be formed by welding metal sheets. The box body 1 adopting the above structure is simple in structure, strong and easy to manufacture.

[0027] In this embodiment, the air guide plate 5 is an arc-shaped plate, and the two ends of the arc-shaped plate are respectively fixed to one opposite inner wall of the box body 1, and an air flow channel is provided between the two sides of the arc-shaped plate and the other opposite inner wall of the box body 1. The protruding part of the arc-shaped plate is close to the air outlet end of the horn 4. In this way, the airflow from the horn 4 is slowed down and dispersed into two airflows, which flow to the multiple silencer plates 6 respectively.

[0028] In this embodiment, the sound-absorbing plate 6 includes a sound-absorbing shell and sound-absorbing cotton placed in the sound-absorbing shell, and a sound-absorbing hole is opened on the sound-absorbing shell. The sound-absorbing hole can make the passing sound better contact with the sound-absorbing cotton, improve the utilization rate of the sound-absorbing cotton, and make the sound absorption effect better.

[0029] The air inlet pipe 2 includes a first pipe body and a first flange connected to one end of the first pipe body. The air outlet pipe 3 includes a second pipe body and a second flange connected to one end of the second pipe body.

[0030] In summary, the double-layer metal cavity self-fluid foaming silencing static pressure box provided by the utility model has a horn 4, an air guide plate 5 and a muffler plate 6 arranged in sequence in the box body 1 along the air flow direction, and the airflow entering the horn 4 from the air inlet pipe 2 is intercepted and noise is reduced, which has a noise reduction and sound absorption effect on noise sound waves. The airflow coming out of the horn 4 impacts on the air guide plate 5 and is dispersed into two airflows, which enter between multiple muffler plates 6 for muffler respectively and then flow out from the air outlet pipe 3. The noise generated when the airflow flows in the box body 1 is blocked by the self-fluid foaming material 7, reducing the noise from propagating outward. In this way, the generation and propagation of noise can be effectively isolated, and the noise level can be reduced.

[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying importance; the words "bottom surface" and "top surface", "inside" and "outside" refer to the geometric direction toward or away from a specific component, respectively.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-layer metal cavity self-fluid foaming silencing static pressure box, characterized in that: The invention comprises a box body (1), an air inlet pipe (2), an air outlet pipe (3), a horn (4), an air guide plate (5) and a sound-absorbing plate (6). Each side wall of the box body (1) is formed with an interlayer cavity, and the interlayer cavity is filled with a self-fluid foaming material (7) to form a uniform and dense sound-absorbing layer. The air inlet pipe (2) and the air outlet pipe (3) are both connected to the box body (1) and communicate with the space inside the box body (1) to guide the inflow and outflow of air in the box body (1). The end of the horn (4) with a larger diameter is connected to the end of the air inlet pipe (2) close to the box (1) and is located in the box (1); the air guide plate (5) is installed in the box (1) and is arranged at a distance from the end of the horn (4) with a smaller diameter, so as to guide the air flow in the horn (4) to disperse to both sides of the air guide plate (5); and a plurality of silencer plates (6) are installed in the box (1) and are arranged at equal intervals between the air guide plate (5) and the air outlet pipe (3).

2. The double-layer metal cavity self-fluid foaming silencing static pressure box according to claim 1 is characterized in that: The self-fluid foaming material (7) is stored in a pressure bottle and is sprayed outward through a nozzle to fill the interlayer cavity.

3. The double-layer metal cavity self-fluid foaming silencing static pressure box according to claim 1 is characterized in that: The self-fluid foaming material (7) is foamed phenolic or polyurethane.

4. The double-layer metal cavity self-fluid foaming silencing static pressure box according to claim 1 is characterized in that: The box body (1) comprises an outer shell (11), an inner shell (12) and an end cover (13); the outer shell (11) is sleeved outside the inner shell (12); an interlayer cavity is formed between the outer shell (11) and the inner shell (12); and the end cover (13) is fixed to both ends between the outer shell (11) and the inner shell (12) to seal the self-fluid foaming material (7) filled in the interlayer cavity.

5. The double-layer metal cavity self-fluid foaming silencing static pressure box according to claim 4 is characterized in that: The box body (1) comprises end plates (14), the end plates (14) block the openings at both ends of the inner shell (12), and the air inlet pipe (2) and the air outlet pipe (3) are respectively connected to the two end plates (14).

6. The double-layer metal cavity self-fluid foaming silencing static pressure box according to claim 4 is characterized in that: The outer shell (11) and the inner shell (12) are formed by welding metal sheets.

7. The double-layer metal cavity self-fluid foaming silencing static pressure box according to claim 1 is characterized in that: The air guide plate (5) is an arc-shaped plate, the two ends of which are respectively fixed to an opposite inner wall of the box body (1), and an air flow channel is provided between the two sides of the arc-shaped plate and the other opposite inner wall of the box body (1).

8. The double-layer metal cavity self-fluid foaming silencing static pressure box according to claim 7 is characterized in that: The protruding portion of the arc-shaped plate is close to the air outlet end of the horn (4).

9. The double-layer metal cavity self-fluid foaming silencing static pressure box according to claim 1 is characterized in that: The sound-absorbing plate (6) comprises a sound-absorbing shell and sound-absorbing cotton placed in the sound-absorbing shell, and the sound-absorbing shell is provided with a sound-absorbing hole.

10. The double-layer metal cavity self-fluid foaming silencing static pressure box according to claim 1 is characterized in that: The air inlet pipe (2) comprises a first pipe body and a first flange connected to one end of the first pipe body, and the air outlet pipe (3) comprises a second pipe body and a second flange connected to one end of the second pipe body.

Images