Silencing structure for ventilation system of stadium and ventilation system thereof

Abstract

The invention relates to a silencing structure for a ventilation system of a performance hall, which comprises an air duct, a centrifugal glass wool board is arranged on the air duct, the outer wall of the air duct is coated with the centrifugal glass wool board along the circumferential direction, a silencing sheet is arranged in the air duct, and the silencing sheet is made by filling centrifugal glass wool in a pore plate. According to the technical scheme, the mode that the air channel is combined with the silencing sheet is adopted, most noise in the air channel is transmitted into the sound absorbing material through the pore plate, and the noise in the air channel can be eliminated by 90% or above.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilation and silencing of performance venues, and in particular to a silencing structure for a ventilation system of a performance venue and a ventilation system thereof. Background Art

[0002] To ensure adequate ventilation, large performance venues require high-power ventilation facilities, including motors with power exceeding 30 kW and noise levels of approximately 75 decibels. These facilities, along with large centrifugal fans with a diameter exceeding 2.8 meters, generate up to 100 decibels of noise when the fans and motors are in operation. If ventilation equipment is moved away from the performance venue, the distance of the air duct will need to be increased or the equipment will need to be upgraded to a larger size. However, excessive distance will weaken the air volume at the outlet, preventing effective ventilation. Upgrading equipment will significantly increase construction costs. If ventilation system equipment is installed too close to the performance venue, the noise from the equipment's operation will be transmitted to the venue, creating a high level of noise pollution and impacting the normal conduct of activities within the venue.

[0003] At the same time, the outlet pressure of large centrifugal fans can reach 10,000-13,000 Pa. When the wind moves through the duct, friction with the duct wall causes duct vibration. Friction within the duct also generates eddy current vibration, which also produces extremely loud noise. Without measures, the noise level at the duct outlet can reach over 60 decibels, similar to the whistling of wind outdoors, seriously interfering with the normal sound of the venue. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, the purpose of the present invention is to provide a sound-absorbing structure for a performance hall ventilation system and a ventilation system thereof, which can effectively block the noise of the ventilation equipment operation and the noise in the air duct itself, and ensure smooth and soft ventilation at the venue's air outlet.

[0006] To achieve the above-mentioned purpose, the technical solution of the first aspect of the present invention provides a sound-absorbing structure for a performance hall ventilation system, comprising an air duct, on which a centrifugal glass wool board is provided, and the centrifugal glass wool board is covered on the outer wall of the air duct along the circumferential direction, and a sound-absorbing sheet is provided in the air duct, and the sound-absorbing sheet is made of centrifugal glass wool filled in a perforated plate.

[0007] In the above technical solution, preferably, there is at least one silencer sheet, and each silencer sheet is welded to the inner wall of the air duct.

[0008] In any of the above technical solutions, preferably, a guide portion is formed on the windward end of the sound-absorbing plate.

[0009] In the above technical solution, preferably, the chamfered structure or rounded structure located on at least one side of the windward end forms the guide portion.

[0010] In the above technical solution, preferably, the end surface of the guide portion is an arc-shaped surface.

[0011] In the above technical solution, preferably, one side of the windward end is an inclined surface inclined toward the outside of the silencer plate to form the guide portion.

[0012] In the above technical solution, preferably, both sides of the windward end are inclined surfaces inclined toward the outside of the silencer plate to form the guide portion, and the angle formed by the two inclined surfaces is 15°-45°.

[0013] In any of the above technical solutions, preferably, the sound-absorbing sheet is a wave-shaped sound-absorbing plate.

[0014] In any of the above technical solutions, preferably, the bulk density of the centrifugal glass wool board is 48 kg / m 3 , the glass fiber diameter is 5.0μm-8.0μm; and / or the hole diameter on the orifice plate is 3mm-8mm, and the hole spacing is 3mm-8mm.

[0015] The technical solution of the second aspect of the present invention provides a ventilation system, comprising a sound-absorbing structure and a connecting flange as provided in any technical solution of the first aspect of the present invention, wherein the connecting flange is arranged in a soundproof room between the performance venue and the equipment room in the performance hall, and the sound-absorbing structure is installed on the connecting flange through a fuel-insulating rubber-plastic sponge seal, and the sound-absorbing structure includes an air duct, and a centrifugal glass wool board is provided on the air duct, and the centrifugal glass wool board is covered on the outer wall of the air duct along the circumferential direction, and a sound-absorbing sheet is provided in the air duct, and the sound-absorbing sheet is made of centrifugal glass wool filled in a perforated plate.

[0016] Compared with the prior art, the advantages of the silencer structure for the ventilation system of a performance hall and the ventilation system thereof provided by the present invention are that the noise of the ventilation system mainly comes from two aspects: one is the noise of the equipment operation and the sound of wind friction in the ventilation duct, and the other is the noise transmitted from the operation of the equipment outside the ventilation duct. Ordinary ventilation duct silencers use a straight-through form of a cylinder or square cylinder for silencer, which can only eliminate 30%-40% of the noise in the air duct, and the noise outside the air duct will also be transmitted to the air supply area through other means. The present invention adopts the form of combining the air duct with a silencer sheet, allowing most of the noise in the air duct to be transmitted to the sound-absorbing material through the perforated plate, which can eliminate more than 90% of the noise in the air duct. In addition, a soundproof room is added to block the noise from the operation of the equipment between the equipment outside the ventilation duct, which can effectively ensure that the performance venue is not disturbed by the noise of the ventilation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0018] Figure 1 A structural diagram of a noise reduction structure according to an embodiment of the present invention is shown;

[0019] Figure 2 One of the structural diagrams of the guide portion involved in Example 1 of the present invention is shown;

[0020] Figure 3 The second structural diagram of the guide portion involved in the first embodiment of the present invention is shown;

[0021] Figure 4 The third structural diagram of the guide portion involved in the first embodiment of the present invention is shown;

[0022] Figure 5 One of the structural diagrams of the guide portion involved in Example 2 of the present invention is shown;

[0023] Figure 6 The second structural diagram of the guide portion involved in the second embodiment of the present invention is shown;

[0024] Figure 7 The third structural diagram of the guide portion involved in the second embodiment of the present invention is shown;

[0025] Figure 8 The figure shows the structure of the guide part involved in the third embodiment of the present invention;

[0026] Figure 9 One of the structural diagrams of the guide portion involved in Example 4 of the present invention is shown;

[0027] Figure 10 The second structural diagram of the guide portion involved in the fourth embodiment of the present invention is shown;

[0028] Figure 11 The third structural diagram of the guide portion involved in the fourth embodiment of the present invention is shown;

[0029] Figure 12 The structure diagram of the wave-shaped sound-absorbing sheet according to the embodiment of the present invention is shown;

[0030] Figure 13 shows a structural diagram of a ventilation system involved in an embodiment of the present invention;

[0031] in, Figures 1 to 13 The corresponding relationship between the reference numerals and component names is as follows:

[0032] 1. Air duct; 2. Centrifugal glass wool board; 3. Silencers; 31. Chamfered structure; 32. Rounded corner structure; 33. Curved surface; 34. Slanted surface; 4. Connecting flange; 5. Performance venue; 6. Equipment room; 7. Soundproof room. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0035] like Figures 1 to 12 As shown, a sound-absorbing structure for a ventilation system of a performance hall according to one embodiment of the present invention includes an air duct 1, on which a centrifugal glass wool board 2 is provided, and the centrifugal glass wool board 2 is covered on the outer wall of the air duct 1 along the circumferential direction, and a sound-absorbing sheet 3 is provided in the air duct 1, and the sound-absorbing sheet 3 is made of centrifugal glass wool filled in a perforated plate.

[0036] In this embodiment, the centrifugal glass wool board 2 wrapped on the outer wall of the air duct 1 can absorb noise when the wind rubs against the inner wall of the air duct 1. At the same time, the sound-absorbing sheet 3 arranged in the air duct 1 can perform secondary sound absorption on the noise generated when the wind itself passes through the air duct 1 at high speed, which can effectively block the noise of the ventilation equipment operation and the noise in the air duct itself, ensuring that the ventilation at the venue's air outlet is smooth and soft without noise interference, thereby ensuring that the performance venue is not disturbed by the noise of the ventilation system.

[0037] In the above embodiment, preferably, there is at least one silencer sheet 3 , and each silencer sheet 3 is welded to the inner wall of the air duct 1 .

[0038] In this embodiment, when installing the muffler sheet 3 in the air duct 1, laser welding and argon arc welding are used to assemble the muffler to prevent leakage of the sound-absorbing material. During the manufacturing process, deformation is controlled to ensure that the air duct 1 is unobstructed and ventilation resistance is reduced.

[0039] Welding process parameters

[0040]

[0041]

[0042] In any of the above embodiments, preferably, a guide portion is formed on the windward end of the sound-absorbing plate 3 .

[0043] Specifically, the configuration of the guide portion includes but is not limited to the following technical solutions:

[0044] Example 1 (as Figures 2 to 4 shown)

[0045] The chamfered structure 31 located on at least one side of the windward end forms the air guide portion.

[0046] In this embodiment, by providing a chamfered structure 31 at the windward end of the silencer plate 3, a streamlined effect is formed when the wind passes through the air duct 1 at high speed, thereby reducing wind resistance and forming a cutting effect on the wind at the windward end, further reducing wind noise.

[0047] Example 2 (as Figures 5 to 7 shown)

[0048] The rounded structure 32 located on at least one side of the windward end forms the air guide portion.

[0049] In this embodiment, by providing a rounded structure 32 at the windward end of the sound-absorbing sheet 3, a streamlined effect is formed when wind passes through the air duct 1 at high speed, thereby reducing wind resistance.

[0050] Example 3 (as Figure 8 shown)

[0051] The end surface of the guide portion is an arc-shaped surface 33 .

[0052] In this embodiment, by designing the end surface of the air guide portion as an arc-shaped surface 33, a streamlined effect is formed when the wind passes through the air duct 1 at a high speed, thereby reducing wind resistance.

[0053] Example 4 (as Figure 9 and Figure 10 shown)

[0054] One side of the windward end is an inclined surface 34 inclined toward the outside of the muffler plate 3 to form the guide portion.

[0055] In this embodiment, by setting one side of the windward end as a slope 34 inclined toward the outside of the silencer plate 3, a streamlined effect is formed in the direction of the corresponding slope 34 when the wind passes through the air duct 1 at high speed, thereby reducing wind resistance, and a cutting effect on the wind is formed at the other end of the corresponding slope 34, further reducing wind noise.

[0056] Example 5 (as Figure 11 shown)

[0057] The two sides of the windward end are inclined surfaces 34 inclined toward the outside of the muffler plate 3 to form the guide portion, and the angle formed by the two inclined surfaces 34 is 15°-45°.

[0058] In this embodiment, by setting the two sides of the windward end as inclined surfaces 34 inclined toward the outside of the sound-absorbing plate 3, a streamlined effect is formed in the direction of the inclined surface 34 when the wind passes through the air duct 1 at high speed, thereby reducing wind resistance, and cutting the wind at the acute angle formed by the two inclined surfaces 34, further reducing wind noise.

[0059] like Figure 12 As shown, in any of the above embodiments, preferably, the sound-absorbing plate 3 is a wave-shaped sound-absorbing plate.

[0060] In this embodiment, the wave-shaped sound-absorbing plate can effectively buffer and eliminate the sound of wind impact, increase the air flow distance, and thus improve the sound-absorbing effect.

[0061] In any of the above embodiments, preferably, the bulk density of the centrifugal glass wool board 2 is 48 kg / m 3 , glass fiber diameter 5.0μm-8.0μm.

[0062] In this embodiment, a centrifugal glass wool board 2 is used with a bulk density of 48 kg / m 3 The fiber diameter is 5.0-8.0μm. It has many advantages such as flame retardancy, non-toxicity, corrosion resistance, low bulk density, and low thermal conductivity. It is currently recognized as the sound-absorbing material with the best performance.

[0063] In any of the above embodiments, preferably, the diameter of the holes on the orifice plate is 3 mm-8 mm, and the hole spacing is 3 mm-8 mm.

[0064] In this embodiment, the perforated plate allows the noise in the air duct to propagate through the holes into the sound-absorbing material, thereby eliminating more than 90% of the noise in the air duct.

[0065] like Figures 1 to 13 As shown, a ventilation system according to another embodiment of the present invention includes the sound-absorbing structure and the connecting flange 4 provided in any one of the above embodiments of the present invention, wherein the connecting flange 4 is arranged in a soundproof room 7 between the performance venue 5 and the equipment room 6 in the performance hall, and the sound-absorbing structure is installed on the connecting flange 4 through a fuel-insulating rubber-plastic sponge seal, and the sound-absorbing structure includes an air duct 1, and a centrifugal glass wool board 2 is provided on the air duct 1, and the centrifugal glass wool board 2 is covered on the outer wall of the air duct 1 along the circumferential direction, and a sound-absorbing sheet 3 is provided in the air duct 1, and the sound-absorbing sheet 3 is made of centrifugal glass wool filled in a perforated plate.

[0066] In this embodiment, the equipment installation room and the performance venue are physically isolated by the soundproof room 7, blocking the propagation channel of the noise outside the air duct 1, which can effectively ensure that the performance venue is not disturbed by the noise of the ventilation system.

[0067] The above embodiment of the present invention provides a method for installing a ventilation system, comprising the following steps:

[0068] The ventilation ducts are made in sections: the length is moderate to ensure that they can pass through the installation site smoothly. Flanges are welded on both sides of the duct to ensure that the flange installation surface is perpendicular to the duct. Appropriate current is used during welding to reduce deformation, ensure smooth welds in the duct and flat pipe walls.

[0069] Production of stainless steel orifice plate: Using stainless steel thin plate can reduce the weight of parts and facilitate production. Then cut and punch holes according to the size of the pipe. The hole diameter is 3mm and the hole spacing is 5mm.

[0070] Fabricating the muffler: Sound-absorbing material is installed inside the muffler sheet (3) and around the muffler wall. Laser welding and argon arc welding are used to assemble the muffler to prevent leakage. During the fabrication process, deformation is controlled to ensure unobstructed air duct (1) and reduce ventilation resistance.

[0071] Install the ventilation duct and muffler: Connect the centrifugal fan, ventilation duct and muffler together through flange connection, taking into account the actual situation on site. Use flame-retardant and heat-insulating rubber-plastic sponge to seal each joint surface, and tighten the bolts and nuts at the flange connection to ensure that there is no leakage in air duct 1.

[0072] Secure the ventilation pipe and muffler to ensure that they do not vibrate during operation.

[0073] The soundproof room 7 is sealed using civil engineering methods, and the thickness of the sealing wall is 240 mm.

[0074] Clean out debris from ventilation equipment, ventilation ducts, and mufflers.

[0075] Implementation Cases

[0076] Before the XX Club's ventilation system was renovated, it was plagued by noise. Equipment Room 6 had a noise level of around 100 decibels, while the performance hall's noise level was measured at around 60 decibels, disrupting normal activities within the venue. Furthermore, the wind noise from the vents was noticeable. After the renovation using the patented structure and method, the noise level was significantly reduced, and the wind from the vents became naturally soft and free of any murmurs. The noise level within the venue was measured at around 20 decibels, completely resolving the club's ventilation system noise problem.

[0077] In the present invention, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; and "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0078] In the description of the present invention, it should be understood that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships 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 unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0079] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0080] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A sound-absorbing structure for a ventilation system of a performance hall, comprising an air duct (1), characterized in that: A centrifugal glass wool plate (2) is provided on the air duct (1), and the centrifugal glass wool plate (2) is covered on the outer wall of the air duct (1) in the circumferential direction. A muffler plate (3) is provided in the air duct (1), and the muffler plate (3) is made of centrifugal glass wool filled in a perforated plate.

2. The sound-absorbing structure for a performance hall ventilation system according to claim 1, characterized in that: There is at least one silencer sheet (3), and each silencer sheet (3) is welded to the inner wall of the air duct (1).

3. The sound-absorbing structure for a performance hall ventilation system according to claim 1 or 2, characterized in that: A flow guide portion is formed at the windward end of the sound-absorbing plate (3).

4. The sound-absorbing structure for a performance hall ventilation system according to claim 3, characterized in that: The chamfered structure (31) or the rounded structure (32) located on at least one side of the windward end forms the guide portion.

5. The sound-absorbing structure for a performance hall ventilation system according to claim 3, characterized in that: The end surface of the guide portion is an arc-shaped surface (33).

6. The sound-absorbing structure for a performance hall ventilation system according to claim 3, characterized in that: One side of the windward end is an inclined surface (34) inclined toward the outside of the (sound-reducing plate 3) to form the guide portion.

7. The sound-absorbing structure for a performance hall ventilation system according to claim 3, characterized in that: The two sides of the windward end are inclined surfaces (34) inclined toward the outside of the muffler plate (3) to form the guide portion, and the angle formed by the two inclined surfaces (34) is 15°-45°.

8. The sound-absorbing structure for a performance hall ventilation system according to claim 1 or 2, characterized in that: The sound-absorbing plate (3) is a wave-shaped sound-absorbing plate.

9. The sound-absorbing structure for a performance hall ventilation system according to claim 1 or 2, characterized in that: The bulk density of the centrifugal glass wool board (2) is 48 kg / m 3 , the glass fiber diameter is 5.0μm-8.0μm; and / or the hole diameter on the orifice plate is 3mm-8mm, and the hole spacing is 3mm-8mm.

10. A ventilation system, characterized in that: It comprises the sound-absorbing structure and the connecting flange (4) according to any one of claims 1 to 9, wherein the connecting flange (4) is arranged in a soundproof room (7) between a performance venue (5) and an equipment room (6) in a performance hall, and the sound-absorbing structure is installed on the connecting flange (4) through a fire-insulating rubber-plastic sponge seal.

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