阅读说明：本技术 一种降噪型风井 (Noise reduction type air shaft ) 是由 金旭炜 杨吉忠 陈志辉 徐志胜 代丰 冯读贝 蔡文锋 李忠继 徐浩 胡连军 陈以 于 2019-10-22 设计创作，主要内容包括：本发明公开了一种降噪型风井,包括进风口和排风口,所述进风口和所述排风口通过内部通道连通,所述内部通道上设有至少一个膨胀腔,所述膨胀腔的截面积大于所述内部通道的截面积。运用本发明所述的一种降噪型风井,集排气通风和消声降噪于一体,充分巧妙地利用了充裕的地下空间或隧道结构,通过在风井内设置所述膨胀腔,利用所述膨胀腔的消声器原理,有效的降低了高速列车驶过时风井所述排风口处的噪声,减少了风井对外部周边环境的噪声污染,同时也具有良好的通风性,满足了高速铁路及地铁系统在隧道区间内的通风需求,保证了乘客的乘坐舒适感,适用于各种有充足空间的地下及隧道结构。(The invention discloses a noise reduction type air shaft which comprises an air inlet and an air outlet, wherein the air inlet is communicated with the air outlet through an internal channel, at least one expansion cavity is arranged on the internal channel, and the sectional area of the expansion cavity is larger than that of the internal channel. The noise-reduction air shaft integrates exhaust ventilation and noise elimination and noise reduction, sufficiently and skillfully utilizes abundant underground space or tunnel structures, effectively reduces the noise at the air outlet of the air shaft when a high-speed train runs by utilizing the silencer principle of the expansion cavity by arranging the expansion cavity in the air shaft, reduces the noise pollution of the air shaft to the external surrounding environment, has good ventilation property, meets the ventilation requirement of a high-speed railway and a subway system in the tunnel region, ensures the comfortable riding of passengers, and is suitable for various underground and tunnel structures with sufficient space.)

1. The utility model provides a type of making an uproar air shaft falls, includes air intake (1) and air exit (3), its characterized in that, air intake (1) with air exit (3) communicate through inner channel (2), be equipped with at least one inflation chamber (4) on inner channel (2), the sectional area in inflation chamber (4) is greater than the sectional area of inner channel (2).

2. A noise reducing air shaft according to claim 1, characterized in that the cross-sectional area of the expansion chamber (4) is at least twice the cross-sectional area of the inner passage (2).

3. The noise reduction type air shaft according to claim 2, characterized in that an expansion chamber (4) is arranged on the inner channel (2), the expansion chamber (4) is located at one end of the inner channel (2) close to the air inlet (1), the expansion chamber (4) and the inner channel (2) are coaxially arranged, and the cross-sectional area of the expansion chamber (4) is twice as large as that of the inner channel (2).

4. The noise reduction type air shaft according to claim 2, characterized in that an expansion chamber (4) is arranged on the inner channel (2), the expansion chamber (4) is located at one end of the inner channel (2) close to the air inlet (1), the expansion chamber (4) and the inner channel (2) are coaxially arranged, and the cross-sectional area of the expansion chamber (4) is three times that of the inner channel (2).

5. the noise reduction type air shaft according to claim 2, characterized in that an expansion cavity (4) is arranged on the inner channel (2), the expansion cavity (4) is arranged at one end of the inner channel (2) close to the air outlet (3), the expansion cavity (4) and the inner channel (2) are coaxially arranged, and the cross-sectional area of the expansion cavity (4) is twice as large as that of the inner channel (2).

6. A noise-reducing air shaft according to claim 2, characterized in that an expansion chamber (4) is provided in the internal passage (2), the expansion chamber (4) is located at an end of the internal passage (2) close to the air outlet (3), the expansion chamber (4) and the internal passage (2) are coaxially arranged, and the cross-sectional area of the expansion chamber (4) is three times that of the internal passage (2).

7. The noise reduction type air shaft according to claim 2, wherein an expansion cavity (4) is arranged on the inner channel (2), the expansion cavity (4) is located at one end of the inner channel (2) close to the air outlet (3), the expansion cavity (4) and the inner channel (2) are eccentrically arranged and protrude out of one side of the air outlet (3), and the sectional area of the expansion cavity (4) is twice that of the inner channel (2).

8. The noise reduction type air shaft according to claim 2, characterized in that the internal channel (2) comprises a side channel (21), the side channel (21) is arranged in the middle of the internal channel (2), an expansion cavity (4) is arranged on the side channel (21), the sectional area of the side channel (21) is equal to the sectional area of the internal channel (2), and the sectional area of the expansion cavity (4) is twice the sectional area of the side channel (21).

9. a noise-reducing air shaft according to any of the claims 1-8, characterized in that the inner channel (2) is a round or rectangular pipe, and the inner channel (2) is a straight or curved pipe.

10. A noise reducing air shaft according to claim 9, characterized in that the expansion chamber (4) is a rectangular chamber, a cylindrical chamber or a spherical chamber.

Technical Field

The invention relates to the field of building structures, in particular to a noise reduction type air shaft.

background

The air shaft is a shaft type structure specially used for ventilation in mines and house buildings. The high-speed railway and the subway system also need carry out ventilation of inner space through setting up the ventilating shaft in the tunnel interval to guarantee passenger's comfort of taking a bus, the operation security of vehicle and equipment. At present, the highest running speed of subway vehicles in China is continuously improved, partial stations of a high-speed railway are arranged underground and are provided with main track tracks, the subway vehicles and high-speed trains pass through underground tunnels or station yards quickly, pneumatic noise in the tunnels and underground station yard spaces is increased rapidly, and then noise at the outlet of an air shaft is aggravated, so that the surrounding environment at the upper part of the air shaft is greatly influenced.

Existing air shaft designs generally only consider the problem of ventilation between underground tunnels and stations and the upper atmosphere, while the problem of noise reduction for air shafts is less considered. Therefore, how to better solve the problem of aggravation of noise at the air shaft outlet of underground stations of subways and high-speed railways is a technical problem faced by engineering technicians in the field.

Disclosure of Invention

the invention aims to overcome the defect that the noise at the outlet of the air shaft of an underground station of a subway and a high-speed railway is larger in the prior art, and provides a noise-reduction air shaft.

In order to achieve the above purpose, the invention provides the following technical scheme:

the utility model provides a type of making an uproar air shaft falls, includes air intake and air exit, the air intake with the air exit passes through the inside passage intercommunication, be equipped with at least one inflation chamber on the inside passage, the sectional area in inflation chamber is greater than the sectional area of inside passage.

Preferably, the cross-sectional area of the expansion chamber is at least twice the cross-sectional area of the internal passage.

Further preferably, an expansion cavity is arranged on the internal passage, the expansion cavity is located at one end, close to the air inlet, of the internal passage, the expansion cavity and the internal passage are coaxially arranged, and the sectional area of the expansion cavity is twice that of the internal passage.

Further preferably, an expansion cavity is arranged on the internal passage, the expansion cavity is located at one end, close to the air inlet, of the internal passage, the expansion cavity and the internal passage are coaxially arranged, and the sectional area of the expansion cavity is three times that of the internal passage.

Further preferably, an expansion cavity is arranged on the internal channel, the expansion cavity is located at one end, close to the air outlet, of the internal channel, the expansion cavity and the internal channel are coaxially arranged, and the sectional area of the expansion cavity is twice that of the internal channel.

Further preferably, an expansion cavity is arranged on the internal channel, the expansion cavity is located at one end, close to the air outlet, of the internal channel, the expansion cavity and the internal channel are coaxially arranged, and the sectional area of the expansion cavity is three times that of the internal channel.

Further preferably, an expansion cavity is arranged on the inner channel, the expansion cavity is located at one end, close to the air outlet, of the inner channel, the expansion cavity and one side, eccentrically arranged and protruding out of the inner channel, of the air outlet, and the sectional area of the expansion cavity is twice of that of the inner channel.

Further preferably, the inner channel includes a side channel, the side channel is disposed in the middle of the inner channel, an expansion cavity is disposed on the side channel, the sectional area of the side channel is equal to the sectional area of the inner channel, and the sectional area of the expansion cavity is twice of the sectional area of the side channel.

Preferably, the internal channel is a circular tube or a rectangular tube, and the internal channel is a straight tube or a bent tube.

Further preferably, the expansion chamber is a rectangular chamber, a cylindrical chamber or a spherical chamber.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

The noise-reduction air shaft integrates exhaust ventilation and noise elimination and noise reduction, sufficiently and skillfully utilizes abundant underground space or tunnel structures, effectively reduces the noise at the air outlet of the air shaft when a high-speed train runs by utilizing the silencer principle of the expansion cavity by arranging the expansion cavity in the air shaft, reduces the noise pollution of the air shaft to the external surrounding environment, has good ventilation property, meets the ventilation requirement of a high-speed railway and a subway system in the tunnel region, ensures the comfortable riding of passengers, and is suitable for various underground and tunnel structures with sufficient space.

Drawings

FIG. 1 is a schematic structural view of a conventional air shaft;

FIG. 2 is a schematic structural view of the noise reduction type air shaft according to embodiment 1;

FIG. 3 is a schematic structural view of the noise reduction type air shaft according to embodiment 2;

FIG. 4 is a schematic structural view of the noise reduction type air shaft according to embodiment 3;

FIG. 5 is a schematic structural view of the noise reduction type air shaft according to embodiment 4;

FIG. 6 is a schematic structural view of a noise reduction type air shaft according to embodiment 5;

FIG. 7 is a schematic structural view of a noise reduction type air shaft according to embodiment 6;

FIG. 8 is a graph showing the comparison between the conventional air shaft and the noise reduction type air shaft in examples 1 to 4;

FIG. 9 is a graph comparing the sound transmission loss of the conventional air shaft and the noise reduction type air shaft described in examples 5 to 6.

The labels in the figure are: 1-air inlet, 2-internal channel, 21-side channel, 3-air outlet and 4-expansion cavity.

Detailed Description

The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.