Silencer and exhaust system suitable for exhaust of pressurized building

Abstract

The utility model relates to the technical field of pressurized building air exhaust, in particular to a silencer and an air exhaust system suitable for pressurized building air exhaust, which comprise a silencer body, and a first vibration isolation and noise elimination layer and a second vibration isolation and noise elimination layer are sequentially arranged in the silencer body from inside to outside. The first vibration isolation and noise elimination layer is connected with the inlet end of the silencer body to form an inner cavity. The first vibration isolation and noise elimination layer is connected with the inner wall of the silencer body, the second vibration isolation and noise elimination layer is connected with the inner wall of the silencer body, an outer cavity is formed between the first vibration isolation and noise elimination layer and the second vibration isolation and noise elimination layer, and high-pressure gas entering from the inlet end of the silencer body sequentially passes through the inner cavity, the first vibration isolation and noise elimination layer, the outer cavity and the second vibration isolation and noise elimination layer and then is exhausted outdoors. According to the silencer, the two vibration isolation silencing layers and the silencing cavities are arranged, the viscous effect of gas is enhanced, the overall silencing capacity of the silencer is improved, and exhaust noise in a pressurized building is effectively restrained.

Description

Technical Field

[0001] The utility model relates to the technical field of pressurized building exhaust, and particularly relates to a muffler and an exhaust system suitable for pressurized building exhaust. Background Art

[0002] In plateau areas, the altitude is high, the air pressure is low, and the oxygen content is small. In order to avoid the harm of the continuous low-pressure and oxygen-deficient environment in high-altitude areas to human body functions, pressurized buildings have emerged as the times require. Different from conventional buildings, pressurized buildings need to continuously supply air and pressurize the building interior through a pressurizing fan. The fresh air volume in the room needs to meet the fresh air volume for indoor personnel's production and life, and at the same time, the carbon dioxide exhaled by the personnel needs to be discharged outdoors. During the exhaust process, a large amount of noise will be generated during the flow-around process of the high-pressure air through the air outlet and the exhaust valve, which will have a greater impact on the life and work of users. Therefore, how to effectively reduce the exhaust noise of pressurized buildings is crucial.

[0003] In summary, the utility model provides a muffler and an exhaust system suitable for pressurized building exhaust to solve the problems existing in the prior art. Content of the Utility Model

[0004] The purpose of the utility model is to provide a muffler and an exhaust system suitable for pressurized building exhaust, and the specific technical solutions are as follows:

[0005] A muffler suitable for pressurized building exhaust includes a muffler body. Inside the muffler body, a first vibration isolation and noise reduction layer and a second vibration isolation and noise reduction layer are successively arranged from inside to outside. The first vibration isolation and noise reduction layer is connected to the inlet end of the muffler body to form an inner cavity; the second vibration isolation and noise reduction layer is connected to the inner wall of the muffler body. An outer cavity is formed between the first vibration isolation and noise reduction layer and the second vibration isolation and noise reduction layer. The high-pressure gas entering from the inlet end of the muffler body passes through the inner cavity, the first vibration isolation and noise reduction layer, the outer cavity, and the second vibration isolation and noise reduction layer in sequence and then is discharged outdoors.

[0006] Further, one or two or more inner cavity partitions are arranged in the inner cavity. One or two or more inner cavity partitions axially divide the inner cavity into two or more inner cavity noise reduction chambers; one or two or more outer cavity partitions are arranged in the outer cavity. One or two or more outer cavity partitions axially divide the outer cavity into two or more outer cavity noise reduction chambers.

[0007] Further, there are 2 inner cavity partitions, and the inner cavity is axially divided into 3 inner cavity noise reduction chambers; there are 2 outer cavity partitions, and the outer cavity is axially divided into 3 outer cavity noise reduction chambers; the inner cavity partitions and the outer cavity partitions are arranged staggeredly.

[0008] Further, the inner cavity partition adopts a micro-slit plate, and the air outlet slits of two adjacent micro-slit plates are arranged at 90°.

[0009] The outer cavity partition plate is made of a micro-perforated plate, the perforation ratio of the micro-perforated plate is 20% - 30%, and the aperture is φ4mm - φ6mm.

[0010] Furthermore, the muffler body includes a housing, and the housing is a hollow cylindrical structure; one end of the housing is provided with a threaded interface, and the threaded interface serves as the inlet end of the muffler body to be connected to the exhaust air pipeline; the other end of the housing is provided with an opening, and the opening serves as the outlet end of the muffler body for gas discharge.

[0011] Furthermore, the first vibration isolation and noise reduction layer includes a first micro-perforated plate and a second micro-perforated plate arranged inside the housing. The first micro-perforated plate is connected to the threaded interface, the second micro-perforated plate is sleeved outside the first micro-perforated plate and connected to the inner wall of the housing. A cavity is formed between the first micro-perforated plate and the second micro-perforated plate, and an inner cavity flow channel sound-absorbing cotton layer is arranged in the cavity.

[0012] Furthermore, both the first micro-perforated plate and the second micro-perforated plate are tubular structures, and the inner diameter of the first micro-perforated plate is the same as the inner diameter of the threaded interface.

[0013] Furthermore, the second vibration isolation and noise reduction layer includes a third micro-perforated plate. The third micro-perforated plate is arranged inside the housing. An outer cavity is formed between the third micro-perforated plate and the second micro-perforated plate; a fourth micro-perforated plate is arranged inside the housing near the outlet end. The third micro-perforated plate, the housing and the fourth micro-perforated plate cooperate to form a cavity, and an outer cavity flow channel sound-absorbing cotton layer is arranged in the cavity.

[0014] Furthermore, a rain shield is arranged at the outlet end of the muffler body.

[0015] An exhaust air system includes an air inlet pipeline, an air outlet pipeline and the muffler as described above, and the muffler is arranged on the air inlet pipeline and / or the air outlet pipeline.

[0016] Applying the technical solution of the present utility model has the following beneficial effects:

[0017] The utility model provides a muffler applicable to the exhaust of pressurized buildings, which comprises a muffler body. Inside the muffler body, a first vibration isolation and noise reduction layer and a second vibration isolation and noise reduction layer are successively arranged from inside to outside. The first vibration isolation and noise reduction layer is connected to the inlet end of the muffler body to form an inner cavity. The second vibration isolation and noise reduction layer is connected to the inner wall of the muffler body. An outer cavity is formed between the first vibration isolation and noise reduction layer and the second vibration isolation and noise reduction layer. The high-pressure gas entering from the inlet end of the muffler body passes through the inner cavity, the first vibration isolation and noise reduction layer, the outer cavity and the second vibration isolation and noise reduction layer in sequence and then is discharged outdoors. One or two or more inner cavity partition plates are arranged in the inner cavity, and one or two or more inner cavity partition plates axially divide the inner cavity into two or more inner cavity noise reduction chambers. One or two or more outer cavity partition plates are arranged in the outer cavity, and one or two or more outer cavity partition plates axially divide the outer cavity into two or more outer cavity noise reduction chambers. The muffler provided by the utility model enhances the viscous effect of the high-pressure gas during the exhaust process by arranging two vibration isolation and noise reduction layers and multiple noise reduction chambers, improves the noise reduction ability of the muffler, and thus effectively reduces the exhaust noise of the pressurized building.

[0018] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The following will refer to the drawings for a further detailed description of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings forming a part of this application are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation to the utility model. In the drawings:

[0020] Figure 1 is the overall structural schematic diagram of the muffler in the embodiment of the utility model;

[0021] Figure 2 is the schematic cross-sectional view of the muffler along the axis;

[0022] Figure 3 is Figure 2 the A-A cross-sectional view in

[0023] Figure 4 is Figure 2 the B-B cross-sectional view in

[0024] Figure 5 is Figure 2 the C-C cross-sectional view in

[0025] Among them, 1. Muffler body, 1.1 Shell, 1.2 Threaded interface, 2. First vibration isolation and sound absorption layer, 2.1 First micro-perforated plate, 2.2 Second micro-perforated plate, 2.3 Inner cavity flow channel sound-absorbing cotton layer, 3. Second vibration isolation and sound absorption layer, 3.1 Third micro-perforated plate, 3.2 Fourth micro-perforated plate, 3.3 Outer cavity flow channel sound-absorbing cotton layer, 4. Inner cavity partition, 5. Outer cavity partition, 6. Rain shield, 7. First inner cavity chamber, 8. Second inner cavity chamber, 9. Third inner cavity chamber, 10. First outer cavity chamber, 11. Second outer cavity chamber, 12. Third outer cavity chamber. Detailed implementation mode

[0026] The embodiments of the present invention will be described in detail below with reference to the drawings. However, the present invention can be implemented in many different ways as defined and covered.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as a limitation of the present invention.

[0028] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0029] Embodiment

[0030] See Figure 1 And Figure 2 As shown in and, this embodiment provides a muffler applicable to the exhaust of pressurized building ventilation, including a muffler body 1. Inside the muffler body 1, a first vibration isolation and sound absorption layer 2 and a second vibration isolation and sound absorption layer 3 are successively arranged from inside to outside. The first vibration isolation and sound absorption layer 2 is connected to the inlet end of the muffler body 1 to form an inner cavity; the second vibration isolation and sound absorption layer 3 is connected to the inner wall of the muffler body 1. An outer cavity is formed between the first vibration isolation and sound absorption layer 2 and the second vibration isolation and sound absorption layer 3. The high-pressure gas entering from the inlet end of the muffler body 1 passes through the inner cavity, the first vibration isolation and sound absorption layer 2, the outer cavity and the second vibration isolation and sound absorption layer 3 in sequence and then is discharged outdoors.

[0031] See Figures 2 - 5, the muffler body 1 includes a housing 1.1, and the housing 1.1 is a hollow cylindrical structure; one end of the housing 1.1 is provided with a threaded interface 1.2, and the threaded interface 1.2 serves as the inlet end of the muffler body 1 and is connected to the exhaust pipeline for the inflow of high-pressure gas; the other end of the housing 1.1 is provided with an opening, and the opening serves as the outlet end of the muffler body 1 for discharging gas outdoors.

[0032] In this embodiment, refer to Figure 2 , the first vibration isolation and noise reduction layer 2 includes a first micro-perforated plate 2.1 and a second micro-perforated plate 2.2 arranged inside the housing 1.1. The first micro-perforated plate 2.1 is connected to the threaded interface 1.2, and the second micro-perforated plate 2.2 is sleeved outside the first micro-perforated plate 2.1 and connected to the inner wall of the housing 1.1. A cavity is formed between the first micro-perforated plate 2.1 and the second micro-perforated plate 2.2, and an inner cavity flow channel sound-absorbing cotton layer 2.3 is arranged in the cavity.

[0033] Preferably, both the first micro-perforated plate 2.1 and the second micro-perforated plate 2.2 are tubular structures, and the inner diameter of the first micro-perforated plate 2.1 is the same as the inner diameter of the threaded interface 1.2.

[0034] In this embodiment, the second vibration isolation and noise reduction layer 3 includes a third micro-perforated plate 3.1. The third micro-perforated plate 3.1 is arranged inside the housing 1.1, and an outer cavity is formed between the third micro-perforated plate 3.1 and the second micro-perforated plate 2.2;

[0035] A fourth micro-perforated plate 3.2 is arranged near the outlet end inside the housing 1.1. The third micro-perforated plate 3.1, the housing 1.1 and the fourth micro-perforated plate 3.2 cooperate to form a cavity, and an outer cavity flow channel sound-absorbing cotton layer 3.3 is arranged in the cavity.

[0036] Preferably, in this embodiment, non-alkali fiberglass cloth is attached to the side of the micro-perforated plate of the first vibration isolation and noise reduction layer 2 and the second vibration isolation and noise reduction layer 3 close to the sound-absorbing cotton, combined with the sound-absorbing cotton to enhance the noise reduction effect.

[0037] In this embodiment, the perforation ratio of the micro-perforated plates used in the first vibration isolation and noise reduction layer 2 and the second vibration isolation and noise reduction layer 3 is 20% - 30%, the hole diameter is φ4mm - φ6mm, the thickness of the non-alkali fiberglass cloth is 0.1mm - 0.2mm, and the density of the sound-absorbing cotton ≥ 48kg / m 3 .

[0038] In this embodiment, refer to Figure 2, one or two or more inner cavity partitions 4 are arranged in the inner cavity, and the one or two or more inner cavity partitions 4 divide the inner cavity into two or more inner cavity sound-absorbing chambers along the axial direction; one or two or more outer cavity partitions 5 are arranged in the outer cavity, and the one or two or more outer cavity partitions 5 divide the outer cavity into two or more outer cavity sound-absorbing chambers along the axial direction.

[0039] Preferably, there are 2 inner cavity partitions 4, and the inner cavity is divided into 3 inner cavity sound-absorbing chambers along the axial direction, namely the first inner cavity chamber 7, the second inner cavity chamber 8 and the third inner cavity chamber 9; there are 2 outer cavity partitions 5, and the outer cavity is divided into 3 outer cavity sound-absorbing chambers along the axial direction, namely the first outer cavity chamber 10, the second outer cavity chamber 11 and the third outer cavity chamber 12; preferably, the inner cavity partitions 4 and the outer cavity partitions 5 are arranged staggeredly, so that the high-pressure air flow entering the muffler is at least divided into three paths:

[0040] The first path: The indoor high-pressure gas flows into the muffler main body through the exhaust pipe, first passes through the first inner cavity chamber 7, the air flow passes through the first vibration isolation and sound-absorbing layer 2 to the first outer cavity chamber 10, and the air flow flows through the second outer cavity chamber 11, the third outer cavity chamber 12 and the second vibration isolation and sound-absorbing layer 3 (the third micro-perforated plate 3.1, the outer cavity flow channel sound-absorbing cotton layer 3.3 and the fourth micro-perforated plate 3.2) in sequence and then is discharged to the outside. During the whole sound-absorbing process, the high-pressure gas passes through 2 vibration isolation and sound-absorbing layers and 3 sound-absorbing chambers, and has a very good sound-absorbing and noise-reducing effect on high, medium and low frequency noises.

[0041] The second path: The indoor high-pressure gas flows into the muffler main body through the exhaust pipe, passes through the first inner cavity chamber 7, flows into the second inner cavity chamber 8 through the inner cavity partition 4, the air flow passes through the first vibration isolation and sound-absorbing layer 2 to the second outer cavity chamber 11, and the air flow flows through the third outer cavity chamber 12 and the second vibration isolation and sound-absorbing layer 3 (the third micro-perforated plate 3.1, the outer cavity flow channel sound-absorbing cotton layer 3.3 and the fourth micro-perforated plate 3.2) in sequence and then is discharged to the outside. During the whole sound-absorbing process, the high-pressure gas passes through 2 vibration isolation and sound-absorbing layers and 3 sound-absorbing chambers, and has a very good sound-absorbing and noise-reducing effect on high, medium and low frequency noises.

[0042] The third path: The indoor high-pressure gas flows into the muffler main body through the exhaust pipe, passes through the first inner cavity chamber 7, flows into the second inner cavity chamber 8 through the first inner cavity partition 4, flows into the third inner cavity chamber 9 through the second inner cavity partition 4, flows into the third outer cavity chamber 12 through the first vibration isolation and sound-absorbing layer 2, and the air flow continues to pass through the second vibration isolation and sound-absorbing layer 3 (the third micro-perforated plate 3.1, the outer cavity flow channel sound-absorbing cotton layer 3.3 and the fourth micro-perforated plate 3.2) and then is discharged to the outside. During the whole sound-absorbing process, the high-pressure gas passes through 2 vibration isolation and sound-absorbing layers and 3 sound-absorbing chambers, and has a very good sound-absorbing and noise-reducing effect on high, medium and low frequency noises.

[0043] In this embodiment, preferably, the inner cavity partition 4 is made of a micro-slit plate, seeFigure 3 and Figure 4 The air outlet slits of two adjacent micro-slit plates are arranged at 90°, enhancing the viscous effect on the high-pressure gas and increasing the noise elimination ability.

[0044] In this embodiment, the outer cavity partition 5 is made of a micro-perforated plate, and the perforation ratio of the micro-perforated plate is 20% - 30%, and the aperture is φ4mm - φ6mm.

[0045] In this embodiment, the inner cavity partition 4 and the outer cavity partition 5 are made of galvanized steel plates with a thickness of 1.2mm, and the micro-perforated plates used for the first vibration isolation and noise elimination layer 2 and the second vibration isolation and noise elimination layer 3 are made of galvanized steel plates with a thickness of 0.5mm, and the housing 1.1 is made of galvanized steel plates with a thickness ≥1.5mm.

[0046] See Figure 2 , a rain shield 6 is provided at the outlet end of the muffler body 1, which can prevent rainwater from flowing into the muffler outlet and affecting the service life and use effect of the vibration isolation and noise elimination layer.

[0047] For the muffler provided by the present utility model, the high-pressure gas in the pressurized building passes through two vibration isolation and noise elimination layers and multiple noise elimination chambers during the exhaust process, enhancing the viscous effect of the gas, increasing the overall noise elimination ability of the muffler, and effectively suppressing the exhaust noise in the pressurized building.

[0048] The present utility model also provides an exhaust system, including an air inlet pipe, an air outlet pipe and the above-mentioned muffler. The muffler is connected to the air inlet pipe and / or the air outlet pipe through a threaded interface, which can effectively reduce the exhaust noise of the pressurized building.

[0049] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A muffler applicable to the exhaust of pressurized buildings, characterized in that, It includes a muffler body (1). Inside the muffler body (1), a first vibration isolation and sound absorption layer (2) and a second vibration isolation and sound absorption layer (3) are successively arranged from inside to outside. The first vibration isolation and sound absorption layer (2) is connected to the inlet end of the muffler body (1) to form an inner cavity; the second vibration isolation and sound absorption layer (3) is connected to the inner wall of the muffler body (1). An outer cavity is formed between the first vibration isolation and sound absorption layer (2) and the second vibration isolation and sound absorption layer (3). The high-pressure gas entering from the inlet end of the muffler body (1) passes through the inner cavity, the first vibration isolation and sound absorption layer (2), the outer cavity, and the second vibration isolation and sound absorption layer (3) in sequence and then is discharged outdoors.

2. The muffler applicable to the exhaust air of a pressurized building according to claim 1, characterized in that, One or two or more inner cavity partitions (4) are arranged in the inner cavity. One or two or more inner cavity partitions (4) axially divide the inner cavity into two or more inner cavity sound absorption chambers; One or two or more outer cavity partitions (5) are arranged in the outer cavity. One or two or more outer cavity partitions (5) axially divide the outer cavity into two or more outer cavity sound absorption chambers.

3. The muffler applicable to the exhaust air of a pressurized building according to claim 2, characterized in that, There are 2 inner cavity partitions (4), and the inner cavity is axially divided into 3 inner cavity sound absorption chambers; there are 2 outer cavity partitions (5), and the outer cavity is axially divided into 3 outer cavity sound absorption chambers; the inner cavity partitions (4) and the outer cavity partitions (5) are arranged staggeredly.

4. The muffler for supercharged building exhaust air according to claim 2, characterized in that, The inner cavity partition (4) adopts a micro-slit plate, and the air outlet slits of two adjacent micro-slit plates are arranged at 90°. The outer cavity partition (5) adopts a micro-perforated plate, the perforation ratio of the micro-perforated plate is 20% - 30%, and the hole diameter is φ4mm - φ6mm.

5. The muffler applicable to the exhaust air of a pressurized building according to claim 1, wherein, The muffler body (1) includes a housing (1.1), and the housing (1.1) is a hollow cylindrical structure; one end of the housing (1.1) is provided with a threaded interface (1.2), and the threaded interface (1.2) serves as the inlet end of the muffler body (1) and is connected to the exhaust pipeline; the other end of the housing (1.1) is provided with an opening, and the opening serves as the outlet end of the muffler body (1) for gas discharge.

6. The muffler applicable to the exhaust air of a pressurized building according to claim 5, characterized in that, The first vibration isolation and sound absorption layer (2) includes a first micro-perforated plate (2.1) and a second micro-perforated plate (2.2) arranged inside the housing (1.1). The first micro-perforated plate (2.1) is connected to the threaded interface (1.2), the second micro-perforated plate (2.2) is sleeved outside the first micro-perforated plate (2.1) and is connected to the inner wall of the housing (1.1). A cavity is formed between the first micro-perforated plate (2.1) and the second micro-perforated plate (2.2), and an inner cavity flow channel sound absorption cotton layer (2.3) is arranged in the cavity.

7. The muffler for pressurized building exhaust air according to claim 6, characterized in that, Both the first micro-perforated plate (2.1) and the second micro-perforated plate (2.2) are tubular structures, and the inner diameter of the first micro-perforated plate (2.1) is the same as the inner diameter of the threaded interface (1.2).

8. A muffler applicable to pressurized building exhaust air according to claim 6, characterized in that, The second vibration isolation and sound absorption layer (3) includes a third micro-perforated plate (3.1). The third micro-perforated plate (3.1) is arranged inside the housing (1.1), and an outer cavity is formed between the third micro-perforated plate (3.1) and the second micro-perforated plate (2.2); A fourth micro-perforated plate (3.2) is provided near the outlet end inside the housing (1.1). The third micro-perforated plate (3.1), the housing (1.1) and the fourth micro-perforated plate (3.2) cooperate to form a cavity, and an outer cavity flow channel sound-absorbing cotton layer (3.3) is provided in the cavity.

9. A muffler applicable to the exhaust of a pressurized building, according to any one of claims 1-8, characterized in that, A rain-proof eaves (6) is provided at the outlet end of the muffler body (1).

10. An exhaust system, characterized in that, It includes an air inlet duct, an air outlet duct and the muffler according to any one of claims 1-9, and the muffler is arranged on the air inlet duct and / or the air outlet duct.

Images