Silencing air pipe

Abstract

A galvanized steel plate (1) and a galvanized perforated plate (6) integrally form a rectangular-ambulatory-plane structure; a gap between the galvanized steel plate (1) and the galvanized perforated plate (6) is filled with the centrifugal glass wool (4), and the U-shaped light steel keel (3) is fixedly connected with the galvanized steel plate (1) and the galvanized perforated plate (6) in series through bolts; the alkali-free fiber cloth (5) is pre-installed in the galvanized perforated plate (6), the outer side of the galvanized steel plate (1) comprises a connecting flange (2), and compared with a traditional silencing air pipe, after construction of the silencing air pipe is completed, the system is stable in operation and low in overall noise, the requirement of a professional place for noise is met, the construction quality can be guaranteed, the construction difficulty can be reduced, and the construction speed can be increased.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and specifically provides a sound-absorbing air duct. Background Technology

[0002] In modern buildings, the requirements for air quality and sound quality in the building environment are becoming increasingly stringent. Air quality control is inseparable from heating, ventilation, and air conditioning (HVAC) systems, which often generate noise and vibration during operation. To reduce the impact of noise, appropriate HVAC system construction methods are needed to ensure that the acoustic requirements of the building environment are met after completion.

[0003] Traditional duct silencing uses silencers, but for scenarios with high noise control requirements, such as theater buildings, a large number of silencers must be installed to achieve the purpose of silencing. Moreover, silencers are expensive, and the duct system needs to be insulated, which further increases the cost. Therefore, it is necessary to invent silencing ducts. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the present invention provides a silencer duct. The purpose of the present invention is to reduce the number of silencers used in scenarios with high noise control requirements, thereby saving costs.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A sound-absorbing duct includes a galvanized steel sheet 1, a connecting flange 2, a U-shaped light steel keel 3, centrifugal glass wool 4, alkali-free fiber cloth 5, and a galvanized perforated plate 6; wherein: the galvanized steel sheet 1 is generally U-shaped, the galvanized perforated plate 6 is generally U-shaped, the galvanized perforated plate 6 is installed inside the galvanized steel sheet 1, and the galvanized steel sheet 1 and the galvanized perforated plate 6 together form a U-shaped structure; the centrifugal glass wool 4 fills the gap between the galvanized steel sheet 1 and the galvanized perforated plate 6; the galvanized steel sheet 1 and the galvanized perforated plate 6 are cut according to the duct size required by the design and bent into U-shapes, and a sound-absorbing material is provided in the middle of the four sides of the galvanized steel sheet 1 and the galvanized perforated plate 6. Bolt holes; U-shaped light steel keel 3 is placed in the middle of the perimeter of galvanized steel plate 1 and galvanized perforated plate 6, and bolt holes are provided on both sides of U-shaped light steel keel 3. The bolt holes of U-shaped light steel keel 3 correspond to the bolt holes of galvanized steel plate 1 and galvanized perforated plate 6. The U-shaped light steel keel 3 is fixedly connected to galvanized steel plate 1 and galvanized perforated plate 6 by bolt connection; Alkali-free fiber cloth 5 is pre-installed inside galvanized perforated plate 6, and alkali-free fiber cloth 5 is bonded to the inner surface of galvanized perforated plate 6 by adhesive; The outer side of galvanized steel plate 1 includes connecting flange 2, and connecting flange 2 and galvanized steel plate 1 are integrally formed by machining.

[0007] This utility model also has the following additional technical features:

[0008] As a further specific optimization of the technical solution of this utility model: the thickness of the galvanized steel plate 1 is 0.5-0.6mm, and the hole diameter is φ4-6mm.

[0009] As a further specific optimization of the technical solution of this utility model: the density of centrifugal glass wool 4 is 24-32 kg / m³, and the average fiber diameter is 5-7 μm.

[0010] As a further specific optimization of the technical solution of this utility model: the alkali-free fiber cloth 5 has a thickness of 0.1-0.5mm.

[0011] As a further specific optimization of the technical solution of this utility model: the thickness of the galvanized perforated plate 6 is 0.5-0.6mm, the hole diameter is φ4-6mm, and the perforation rate P is greater than or equal to 20%.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] Compared with traditional silencer ducts, this silencer duct system operates smoothly after construction, with low overall noise, meeting the noise requirements of professional venues. It also ensures construction quality, reduces construction difficulty, and speeds up construction. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the cross-sectional structure of the sound-absorbing duct of this utility model;

[0015] Figure 2 This is a schematic diagram of the installation structure of the silencer duct of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Galvanized steel plate; 2. Connecting flange; 3. U-shaped keel; 4. Centrifugal glass wool; 5. Alkali-free fiber cloth; 6. Galvanized perforated plate; 7. Spring shock absorber. Detailed Implementation

[0017] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings.

[0018] Example 1

[0019] A sound-absorbing duct includes a galvanized steel sheet 1, a connecting flange 2, a U-shaped light steel keel 3, centrifugal glass wool 4, alkali-free fiber cloth 5, and a galvanized perforated plate 6; wherein: the galvanized steel sheet 1 is generally U-shaped, the galvanized perforated plate 6 is generally U-shaped, the galvanized perforated plate 6 is installed inside the galvanized steel sheet 1, and the galvanized steel sheet 1 and the galvanized perforated plate 6 together form a U-shaped structure; the centrifugal glass wool 4 fills the gap between the galvanized steel sheet 1 and the galvanized perforated plate 6; the galvanized steel sheet 1 and the galvanized perforated plate 6 are cut according to the duct size required by the design and bent into U-shapes, and a sound-absorbing material is provided in the middle of the four sides of the galvanized steel sheet 1 and the galvanized perforated plate 6. Bolt holes; U-shaped light steel keel 3 is placed in the middle of the perimeter of galvanized steel plate 1 and galvanized perforated plate 6, and bolt holes are provided on both sides of U-shaped light steel keel 3. The bolt holes of U-shaped light steel keel 3 correspond to the bolt holes of galvanized steel plate 1 and galvanized perforated plate 6. The U-shaped light steel keel 3 is fixedly connected to galvanized steel plate 1 and galvanized perforated plate 6 by bolt connection; Alkali-free fiber cloth 5 is pre-installed inside galvanized perforated plate 6, and alkali-free fiber cloth 5 is bonded to the inner surface of galvanized perforated plate 6 by adhesive; The outer side of galvanized steel plate 1 includes connecting flange 2, and connecting flange 2 and galvanized steel plate 1 are integrally formed by machining.

[0020] The galvanized steel sheet 1 has a thickness of 0.5-0.6 mm and a hole diameter of φ4-6 mm. The centrifugal glass wool 4 has a density of 24-32 kg / m³ and an average fiber diameter of 5-7 μm. The alkali-free fiber cloth 5 has a thickness of 0.1-0.5 mm. The galvanized perforated plate 6 has a thickness of 0.5-0.6 mm, a hole diameter of φ4-6 mm, and a perforation rate P greater than or equal to 20%.

[0021] Example 2

[0022] The manufacturing sequence of the silencer duct is as follows:

[0023] Step 1: According to the drawing requirements, galvanized steel sheet 1, connecting flange 2, and galvanized perforated plate 6 are formed in one step by shearing, folding, edge bending, and joint corner seaming.

[0024] Step 2: Flatly bond the alkali-free fiber cloth 5 to the surface of the galvanized perforated plate 6 according to the size of the galvanized perforated plate 6.

[0025] Step 3: Use U-shaped keel 3 to fix galvanized steel plate 1 and galvanized perforated plate 6 with bolts to ensure the stability of the air duct.

[0026] Step 4: Fill the gaps between the galvanized steel plate 1 and the galvanized perforated plate 6 with centrifugal glass wool 4 according to the designed density, thickness and other requirements.

[0027] Step 5: Hoist the silencer duct onto the top beam 8 and use spring shock absorbers 7 for vibration damping to better control the noise generated by the airflow within the system and the noise generated by the vibration of the system operation.

[0028] Based on Embodiments 1 and 2, this invention effectively solves the problems of traditional ducts being unable to achieve noise reduction and the increased cost due to the extensive use of vibration dampers. This invention ensures construction quality, reduces construction difficulty, and accelerates construction speed.

[0029] The above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

Claims

1. A sound attenuating air duct, characterized by: Includes galvanized steel sheet (1), connecting flange (2), U-shaped light steel keel (3), centrifugal glass wool (4), alkali-free fiber cloth (5), and galvanized perforated plate (6); wherein: The galvanized steel sheet (1) is in the shape of a square, the galvanized perforated plate (6) is in the shape of a square, the galvanized perforated plate (6) is installed inside the galvanized steel sheet (1), and the galvanized steel sheet (1) and the galvanized perforated plate (6) together form a square structure. The centrifugal glass wool (4) is filled in the gap between the galvanized steel plate (1) and the galvanized perforated plate (6); Bolt holes are provided in the middle of the four sides of the galvanized steel plate (1) and the galvanized perforated plate (6); the U-shaped light steel keel (3) is placed in the middle of the four sides of the galvanized steel plate (1) and the galvanized perforated plate (6), and the U-shaped light steel keel (3) has bolt holes on both sides. The bolt holes of the U-shaped light steel keel (3) correspond to the bolt holes of the galvanized steel plate (1) and the galvanized perforated plate (6). The U-shaped light steel keel (3) is fixedly connected to the galvanized steel plate (1) and the galvanized perforated plate (6) by bolt stringing. The alkali-free fiber cloth (5) is pre-installed inside the galvanized perforated plate (6), and the alkali-free fiber cloth (5) is bonded to the inner surface of the galvanized perforated plate (6) by an adhesive. The outer side of the galvanized steel sheet (1) includes a connecting flange (2), which is integrally formed with the galvanized steel sheet (1) by machining.

2. The anechoic wind tube of claim 1, wherein: The galvanized steel sheet (1) has a thickness of 0.5-0.6 mm and a hole diameter of φ4-6 mm.

3. The anechoic wind tube of claim 1, wherein: The centrifugal glass wool (4) has a bulk density of 24-32 kg / m and an average fiber diameter of 5-7 μm.

4. The anechoic wind-tube of claim 1, wherein: The alkali-free fiber cloth (5) has a thickness of 0.1-0.5 mm.

5. The anechoic wind tube of claim 1, wherein: The thickness of the galvanized perforated plate (6) is 0.5-0.6 mm, the hole diameter is φ4-6 mm, and the perforation rate P is greater than or equal to 20%.

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