Array type and sheet type composite structure silencer

Abstract

A silencer of an array type and sheet type composite structure comprises silencer unit cells arranged in an array type and silencing sheets arranged in parallel in the transverse / vertical direction, the section of each silencer unit cell is quadrilateral, and the silencing sheets arranged in parallel in the transverse / vertical direction are arranged in a silencing channel formed by the silencer unit cells arranged in the array type. According to the array type and sheet type composite structure silencer, the high-frequency silencing performance of a large-size section array type silencer can be effectively improved, a sheet type silencing structure is arranged in a silencing channel of the array type silencer, the composite silencer is formed, and the high-frequency silencing amount of the structure can be improved while the low and medium frequency silencing effect is guaranteed. The silencer of the array type and sheet type composite structure also improves the applicability of different silencing frequencies, and the silencing effect the same as that of an existing array type silencer can be achieved only by adopting a shorter length.

Description

Technical Field

[0001] The utility model relates to a muffler, in particular to an array-type and sheet-type composite structure muffler. Background Art

[0002] For noise control in large ventilation systems such as tunnels, subways, and mines, sheet-type, array-type, or honeycomb-type silencer structures are often used. The cross-section of a single cell of an array silencer is generally rectangular or quadrilateral, and the space between the cells is the silencer channel. After the array is arranged, the sides of adjacent silencer cells are parallel to each other. The main structure of the array-type resistive silencer commonly used now is a metal perforated plate with glass wool and other resistive sound-absorbing materials filled inside. This type of structure has good mid-frequency silencer performance and a wide mid-frequency silencer bandwidth, but in actual use, there are defects such as insufficient low-frequency silencer, excessive mid-frequency silencer, and high-frequency failure. At the same ventilation rate, if a silencer cell with a smaller cross-sectional size is selected, although the failure frequency increases and the high-frequency silencer effect is improved, the low-frequency silencer volume of the silencer decreases. In addition, as the number of silencers increases, the project cost and installation difficulty also increase. On the other hand, while using an array silencer with a larger unit cell cross-section improves low-frequency silencing, at the same ventilation rate, the spacing between the silencer channels increases, the failure frequency decreases, and the high-frequency silencing effect deteriorates. In practice, to address these issues and ensure silencing effectiveness, longer array silencers are typically used, which increases the length of subway underground ventilation structures and significantly increases construction costs. In summary, designing and manufacturing new subway silencers that offer optimal silencing effectiveness, flow area, and processing and installation costs has significant social and economic benefits.

[0003] When the ventilation rate remains constant, increasing the cross-sectional size of the array muffler cells can improve the muffler's low-frequency sound absorption, while also reducing the number of cells and lowering material and processing costs. However, due to the increased spacing between the muffler cells, the failure frequency of the structure decreases, resulting in a decrease in high-frequency sound absorption. To address this technical challenge, the currently commonly used solution is to increase the muffler length to achieve better high-frequency performance. However, this increases the weight and cost of the muffler, is particularly detrimental to reducing the air duct length, and significantly increases subway construction costs.

[0004] It should be noted that the information disclosed in the above background technology section is only used to understand the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Utility Model Content

[0005] The main purpose of the present invention is to solve the problems existing in the above-mentioned background technology and to provide a muffler with an array-type and plate-type composite structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A silencer with an array and plate composite structure includes silencer cells arranged in an array and silencer plates arranged in horizontal / vertical parallel. The cross-section of the silencer cells is a quadrilateral, and the silencer plates arranged in horizontal / vertical parallel are arranged in a silencer channel formed by the silencer cells arranged in an array.

[0008] Further:

[0009] The cross-sectional side length of the muffler unit cell is 100-2000 mm, and the length is 100-10000 mm. The thickness of the muffler sheet is 10-2000 mm, and the length is 100-10000 mm.

[0010] The muffler unit cell is composed of a muffler body and a flow guide cover fixedly connected to both ends of the muffler body. The outside of the muffler body is a perforated plate shell, and the inside is filled with resistive sound absorbing material.

[0011] The muffler sheet is composed of a muffler body and a flow guide cover fixedly connected to both ends of the muffler body. The outside of the muffler body is a perforated plate shell, and the inside is filled with resistive sound absorbing material.

[0012] The deflector cover is a wedge-shaped, arc-shaped or streamlined deflector cover.

[0013] The resistive sound absorbing material is wrapped by non-woven fabric or waterproof glass fiber cloth.

[0014] The external perforated plate is made of galvanized steel plate, aluminum alloy plate or stainless steel plate.

[0015] The resistive sound absorbing material includes glass fiber wool or porous material, and the bulk density of the glass fiber wool is in the range of 10 to 80 kg / m 3 .

[0016] It also includes a plurality of support rods, and the deflector covers of the plurality of silencers in the same vertical row are correspondingly fixed on the same support rod.

[0017] The muffler cells arranged in an array are arranged in parallel along the airflow direction.

[0018] The utility model has the following beneficial effects:

[0019] The utility model provides an array-type and plate-type composite structure silencer, which can effectively improve the high-frequency sound absorption performance of the large-size cross-section array-type silencer. A plate-type sound absorption structure is arranged in the sound absorption channel of the array-type silencer to form a composite silencer, which can ensure the medium and low-frequency sound absorption effect while improving the high-frequency sound absorption of the structure.

[0020] The array-type and plate-type composite structure silencer is designed to target the noise spectrum, improving the applicability of different silencer frequencies and only requires a shorter length to achieve the same silencer effect as the existing array-type silencer.

[0021] Other beneficial effects of the embodiments of the present invention will be further described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the combined structure of an array type muffler with a rectangular muffler unit cell cross-section and a vertically arranged plate type muffler according to an embodiment of the present utility model;

[0023] Figure 2 This is a front view of the combined structure of an array type muffler with a rectangular muffler unit cell cross-section and a vertically arranged plate type muffler according to an embodiment of the present utility model;

[0024] Figure 3 This is a top view of the combined structure of an array type muffler with a rectangular muffler unit cell cross-section and a vertically arranged plate type muffler according to an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the combined structure of an array type muffler with a rectangular unit cell cross section and a transversely arranged plate type muffler according to an embodiment of the utility model;

[0026] Figure 5 This is a schematic diagram of the installation of an array-type and vertically arranged sheet-type composite structure muffler according to an embodiment of the present invention;

[0027] Figure 6 This is a front view of the installation of the array-type and vertically arranged sheet-type composite structure silencer of an embodiment of the present utility model.

[0028] In the figure: 1-perforated plate, 2-resistive sound absorbing material, 3-wedge-shaped air guide cover of the muffler plate, 4-air guide cover of the muffler unit cell, 5-support rod. DETAILED DESCRIPTION

[0029] The following is a detailed description of the embodiments of the present invention. It should be emphasized that the following description is merely illustrative and is not intended to limit the scope and application of the present invention.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and coupling or communication.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply 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.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0033] See Figures 1 to 6 An embodiment of the present invention provides an array-type and plate-type composite structure silencer, including silencer cells arranged in an array, and silencer plates arranged in horizontal / vertical parallel. The cross-section of the silencer cell is a quadrilateral, and the horizontal / vertical parallel silencer plates are arranged in a silencer channel formed by the silencer cells arranged in an array.

[0034] In order to improve the high-frequency sound-absorbing performance of large-size cross-section array silencers, the array-type and plate-type composite structure silencer is equipped with a plate-type sound-absorbing structure in the silencer channel of the array-type silencer to form a composite structure silencer. This can improve the high-frequency sound absorption of the structure while ensuring the low-frequency sound absorption effect, and shorten the current silencer length, providing favorable conditions for shortening the length of the subway air duct. The cross-section of the array-type silencer cell is a quadrilateral, which can be a square or a non-square rectangle. The silencer cell consists of a silencer body and a guide cover fixed to both ends of the silencer body. The outside of the silencer body is a perforated plate shell, and the inside is filled with resistive sound-absorbing material. The array-type silencer cell is fixed to the bracket rod in the ventilation duct through the guide cover and is arranged parallel to the airflow direction. The cell spacing can be flexibly adjusted according to the sound absorption and ventilation rate requirements. The pressure loss of the structure can be reduced by installing the guide cover. A disc-type muffler consists of muffler discs arranged in parallel, either vertically or horizontally. These discs are encased in a perforated plate shell and filled with resistive sound-absorbing material. Wedge-shaped deflectors are preferably installed at the front and rear ends to minimize pressure loss. These deflectors can also be circular or streamlined to reduce fluid resistance. The disc-type muffler is installed in the middle of the muffler channel formed by adjacent cells in the array muffler.

[0035] This array-type and plate-type composite structure silencer improves low-frequency sound attenuation and reduces material processing costs. The addition of the plate-type silencer reduces the distance between the silencer channels of the array-type silencer cells, increases the effective sound attenuation area, improves the sound attenuation performance of the structure in the entire frequency band, and can effectively suppress high-frequency failure. Compared with the existing array-type silencer, at the same length of silencer, the addition of the plate-type silencer increases the sound absorption surface area per unit cross-sectional area of ​​the structure, improves the noise reduction effect, and can be customized to meet different sound attenuation requirements, further improving the sound attenuation effect. For different noise sources, this composite structure silencer can achieve the same sound attenuation effect as the existing array-type silencer through targeted design and a shorter length.

[0036] In composite structure silencers, the cross-sectional side length of the array silencer unit cell is 100-2000mm and the length is 100-10000mm. The thickness of the plate silencer is 10-2000mm and the length is 100-10000mm. The external perforated plate is made of galvanized steel, aluminum alloy or stainless steel. The bulk density of the glass fiber filling ranges from 10 to 80kg / m 3 , preferably, the bulk density of glass fiber wool is 36kg / m 3 , 48kg / m 3 .

[0037] like Figures 1 to 4 As shown, the utility model discloses a silencer of an array-type and plate-type composite structure, which includes two structures: an array-type silencer and a plate-type silencer. The array-type silencer includes silencer cells arranged in an array, and the silencer cells are composed of a silencer body and a flow guide hood 4. The silencer body has a quadrilateral cross-section, a perforated plate on the outside, and a resistive sound-absorbing material on the inside. The array-type silencer cells are arranged in parallel along the airflow direction, and the cell spacing can be flexibly adjusted according to the requirements of the sound attenuation and ventilation rate. The plate-type silencer is composed of a silencer body and a wedge-shaped flow guide hood 3. The silencer body has a perforated plate 1 on the outside and a resistive sound-absorbing material 2 on the inside. It is installed in the middle of the silencer channel formed by adjacent silencer cells of the array-type silencer, and can be installed in vertical or horizontal forms according to needs. When filled with resistive sound-absorbing material, the resistive sound-absorbing material 2 is wrapped with sound-permeable non-woven fabric, waterproof fiberglass cloth, glass fiber cloth, sound-absorbing felt, or other sound-permeable fabric. Resistive sound-absorbing material 2 can be made from materials such as centrifugal ultra-fine glass wool, slag wool, wood fiber, polystyrene, polyurethane foam, and phenolic foam. The combined structure of array-type and plate-type mufflers increases the contact between sound waves and the muffler surface, expanding the effective sound absorption area. This allows for customized designs to meet different sound absorption requirements and enhance the sound absorption effect.

[0038] Figure 5 and Figure 6This is a schematic diagram of the installation of a composite array and disc-type muffler according to an embodiment of the present invention. The array-type muffler cell's shroud 4 is bolted to a support rod 5, which is also bolted to a building's air duct or metal housing. The disc-type muffler is bolted directly to the building's air duct or metal housing.

[0039] The utility model can customize the design for different silencer requirements by designing array-type and plate-type silencer structures that match and work together, meet the use of different scenarios, expand the silencer frequency band, and improve the applicability of the silencer.

[0040] The above content is a further detailed description of the present invention in conjunction with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, they can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be considered to belong to the scope of protection of the present invention. In the description of this specification, the reference terms "one embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in an appropriate manner in any one or more embodiments or examples. Without mutual contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and alterations can be made herein without departing from the scope of protection of the patent application.

Claims

1. An array-type and sheet-type composite structure muffler, characterized in that: It includes silencer cells arranged in an array and silencer plates arranged in horizontal / vertical parallel. The cross section of the silencer cells is a quadrilateral. The silencer plates arranged in horizontal / vertical parallel are arranged in a silencer channel formed by the silencer cells arranged in an array.

2. The array-type and plate-type composite structure muffler according to claim 1, characterized in that: The cross-sectional side length of the muffler unit cell is 100-2000 mm, and the length is 100-10000 mm. The thickness of the muffler sheet is 10-2000 mm, and the length is 100-10000 mm.

3. The array-type and plate-type composite structure muffler according to claim 1, characterized in that: The muffler unit cell is composed of a muffler body and a flow guide cover fixedly connected to both ends of the muffler body. The outside of the muffler body is a perforated plate shell, and the inside is filled with resistive sound absorbing material.

4. The array-type and plate-type composite structure muffler according to claim 1, characterized in that: The muffler sheet is composed of a muffler body and a flow guide cover fixedly connected to both ends of the muffler body. The outside of the muffler body is a perforated plate shell, and the inside is filled with resistive sound absorbing material.

5. The array-type and plate-type composite structure muffler according to claim 4, characterized in that: The deflector cover is a wedge-shaped, arc-shaped or streamlined deflector cover.

6. The array-type and plate-type composite structure muffler according to any one of claims 3 to 5, characterized in that: The resistive sound absorbing material is wrapped by non-woven fabric or waterproof glass fiber cloth.

7. The array-type and plate-type composite structure muffler according to any one of claims 3 to 5, characterized in that: The perforated plate is made of galvanized steel plate, aluminum alloy plate or stainless steel plate.

8. The array-type and plate-type composite structure muffler according to any one of claims 3 to 5, characterized in that: The resistive sound absorbing material includes glass fiber wool or porous material, and the bulk density of the glass fiber wool is in the range of 10 to 80 kg / m 3 .

9. The array-type and plate-type composite structure muffler according to claim 3, characterized in that: It also includes a plurality of support rods, and the deflector covers of the plurality of silencers in the same vertical row are correspondingly fixed on the same support rod.

10. The array-type and plate-type composite structure muffler according to any one of claims 1 to 5, characterized in that: The muffler cells arranged in an array are arranged in parallel along the airflow direction.

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