CN207813638U - A kind of tunnel ventilation silencing means based on resistive energy-absorbing - Google Patents

Abstract

The utility model is a tunnel ventilation and muffler device based on resistive energy absorption, which includes a horizontal part and a vertical part, and the two ends of the horizontal part are respectively connected with the lower end of the vertical part; when the valve and the blower are activated, the dirty air and noise in the tunnel Enter the tunnel ventilation and muffler device through the air inlet, first pass through the channel composed of sound-absorbing parts, the noise can absorb the middle and low-frequency noise through continuous contact and reflection with the sound-absorbing parts; , to achieve the purpose of absorbing medium and high frequency noise, and finally discharged to the outside of the shaft or tunnel through the valve and exhaust fan. The utility model integrates the tunnel ventilation device and the sound-absorbing components in the hardware system as a whole, improves the traditional concept of tunnel ventilation and sound-absorbing, provides a new way of ventilation and sound-absorbing, can effectively eliminate the noise pollution of different frequencies in the tunnel, and is suitable for Different tunnel environments.

Description

A Tunnel Ventilation Muffling Device Based on Resistive Energy Absorption

【Technical field】

The utility model relates to the technical field of tunnel ventilation, in particular to a tunnel ventilation and noise reduction device based on resistive energy absorption.

【Background technique】

In recent years, a large number of extra-long highway tunnels have been built and put into operation. The highway tunnel has gradually shifted from the peak construction period to the peak operation period. However, due to the influence of traffic volume and tunnel structure, it is relatively difficult to discharge pollutants in the tunnel, and during the operation of the ventilation device, The fan impeller will generate rotating eddy current noise, vehicle flow noise, and equipment vibration noise, etc. The above-mentioned noise is concentrated and difficult to eliminate, making the problem of ventilation and noise reduction an important problem faced during operation.

The main function of the tunnel ventilation device is to supply fresh air to the interior of the tunnel and remove harmful gases, steam, dust and other harmful substances. At present, the main noise reduction measures are to add noise reduction equipment before and after the tunnel ventilation device. This kind of equipment can only be used to a certain extent. Reduce the rotating noise of the impeller when the fan is running, but it cannot effectively reduce or eliminate the noise pollution of different frequencies, the flow noise of the gas, and the noise generated by the vibration of the fan itself. Long-term use in this environment will damage the health of people in the tunnel. At the same time, it will also affect the driving safety in the tunnel.

Resistive energy absorption is the principle of using sound waves to propagate in porous sound-absorbing materials or sound-absorbing structures, and the sound energy is converted into heat energy due to friction and emitted, so that the noise propagating along the pipeline is attenuated with distance. Through the resistive principle, different sound-absorbing materials and structural forms can be used to attenuate the noise in different frequency bands. Therefore, it is necessary to propose a practical, reliable, economical and efficient tunnel ventilation and noise reduction device based on resistive energy absorption.

【Content of utility model】

In order to overcome the problems of the prior art, the purpose of the utility model is to provide a tunnel ventilation and noise reduction device based on resistive energy absorption.

In order to achieve the above object, the utility model adopts the following technical solutions:

A tunnel ventilation and noise reduction device based on resistive energy absorption, comprising a horizontal part and a vertical part installed in the tunnel, the two ends of the horizontal part communicate with the lower end of a vertical part respectively, and the inner walls of the horizontal part and the vertical part are glued together The phenolic glass fiber layer is laid in knots; in the vertical part, blowers, valves and several parallel vertical silencing channels are arranged in sequence from top to bottom. Between adjacent vertical silencing channels, vertical silencing channels The sound-absorbing filling material is filled between the phenolic glass fiber layer and the horizontal part of the sound-absorbing channel; the sound-absorbing parts are bonded to the surface of the phenolic glass fiber layer, and the lower part of the horizontal part is provided with an air inlet.

The vertical sound-absorbing channel is arranged in the vertical part in a continuous bending shape; the sound-absorbing parts are installed in the horizontal sound-absorbing channel in the form of plates staggered up and down.

The angle between the entrance inner wall of any vertical sound-absorbing passage and the vertical is θ≤20°, and the width is 250-450mm.

The width of the sound-absorbing parts of the transverse sound-absorbing channel is 60-80mm, the length is the actual width of the transverse sound-absorbing channel, and the height is 0.5-0.7 times of the height of the transverse sound-absorbing channel. , Styrofoam and sound insulation cotton.

Both the outer walls of the horizontal part and the vertical part are bonded with a rubber shock-absorbing layer through a rubber adhesive, and the thickness of the rubber shock-absorbing layer is 80-100 mm.

The distance between the air inlets of the transverse part along the longitudinal direction of the tunnel is 40-60m, and the upper part of the air inlets is provided with a gas filter layer.

The gas filter layer includes a filter screen and fiber filter material with a thickness of 50-80mm.

The horizontal part of the tunnel ventilation and muffler device is longitudinally arranged along the inner top of the tunnel, and the upper end of the vertical part extends to the tunnel shaft or the outside of the tunnel.

The ventilation and noise reduction device is connected to the inner top of the tunnel through a fixed pendant at the top of the transverse part; the distance between the top of the horizontal part of the tunnel ventilation and noise reduction device and the inner top of the tunnel is ≥300mm.

The phenolic glass fiber layer is bonded to the inner wall of the horizontal part and the vertical part of the tunnel ventilation and muffler device through glass fiber special glue, and the thickness of the phenolic glass fiber layer is 70-90 mm.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model is a tunnel ventilation and muffler device based on resistive energy absorption, which is arranged in the tunnel and includes a horizontal part and a vertical part, and the two ends of the horizontal part are respectively connected with the lower end of the vertical part; When the valve and the blower are activated, the dirty air and noise in the tunnel enter the tunnel ventilation and muffler device through the air inlet at the lower part of the horizontal part, and first pass through the channel composed of mufflers. Due to its relatively complicated structure, the resistance loss is relatively large, so that the noise passes through continuously and The contact and reflection of the sound-absorbing parts achieve the purpose of absorbing the middle and low-frequency noise; then the noise is dispersed through the sound-absorbing channel composed of sound-absorbing filling materials. Because the sound-absorbing material is tightly arranged and the streamline is smooth, the purpose of absorbing the middle and high-frequency noise is achieved. The utility model integrates the tunnel ventilation device and the sound-absorbing components in the hardware system as a whole, improves the traditional concept of tunnel ventilation and sound-absorbing, provides a new way of ventilation and sound-absorbing, can effectively eliminate the noise pollution of different frequencies in the tunnel, and is suitable for Different tunnel environments.

Further, the vertical sound-absorbing channel is vertically arranged in a bent shape in the vertical part, and bonded with the sound-absorbing filling material, which can increase the number of reflections of the sound wave in the sound-absorbing channel, that is, increase the chance of contact between the sound wave and the sound-absorbing material, Improve the sound absorption effect, and further limit the bending angle and the width of the vertical channel to fully ensure the dynamic performance and noise reduction effect of the passing air.

Furthermore, the sound-absorbing parts are installed vertically and staggeredly in the horizontal sound-absorbing channel in the form of plates, forming a labyrinth-shaped sound-absorbing channel. This complex structure can increase the loss of sound wave resistance; further restrictions on the specifications and materials of the sound-absorbing parts make the noise Through its continuous contact and reflection with the sound-absorbing parts, it can effectively absorb low-frequency and medium-frequency noise.

Further, a rubber shock-absorbing layer is bonded outside the tunnel ventilation and noise reduction device to reduce the noise in the tunnel by absorbing the vibration of the tunnel ventilation and noise reduction device itself.

Further, the valve has three control modes, and the blower is selected according to the wind pressure intensity of the installation tunnel, so that the device can select an operation mode according to different control requirements.

Further, the utility model can reasonably arrange the number of air inlets and the distance between them according to the actual environment of the tunnel, and in tunnels with harsh environments, the distance can be appropriately reduced, the number can be increased, and the noise absorption effect can be improved;

Further, the upper part of the air inlet of the utility model is provided with a gas filter layer, through which particles and dust with larger particle diameters can be filtered out, reducing their influence on vibration and noise inside the device.

Further, the utility model runs through the entire tunnel, and is connected to the inner top of the tunnel through a fixed pendant. The layout position, length, number of air inlets, number of sound-absorbing parts, and the number of sound-absorbing filling materials of the ventilation and noise reduction devices can be adjusted according to the operating environment of the actual tunnel. To adjust the conditions, it may be considered to add tunnels in sections where the air quality is poor and the noise is concentrated.

Furthermore, in the utility model, a phenolic glass fiber layer is bonded to the inner wall of the horizontal part and the vertical part of the entire tunnel ventilation and noise reduction device, which can effectively prevent noise diffusion together with sound-absorbing filling materials and sound-absorbing parts.

【Description of drawings】

Fig. 1 is the layout schematic diagram of the present utility model;

Fig. 2 is the structural representation of the utility model;

Among them: 1-broken area; 2-transverse sound-absorbing channel; 3-sound-absorbing filling material; 4-rubber shock-absorbing layer; 5-phenolic glass fiber layer; 6-valve; 7-blower; ; 10-gas filter layer; 11-fixed pendant; 12-tunnel; 13-vertical silencer channel.

【Detailed ways】

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, not to limit the utility model.

See Figure 1: A tunnel ventilation and noise reduction device based on resistive energy absorption, which runs radially through the tunnel; it includes a horizontal part and a vertical part, the two ends of the horizontal part are connected to the lower ends of the two vertical parts, and the horizontal part runs The inner top is arranged longitudinally, and the vertical part extends to the tunnel shaft or the outside of the tunnel. The device is fixed on the inner top of the tunnel through a fixing bracket, and the distance between the top of the lateral part of the ventilation and muffler device and the inner top of the tunnel is >300mm.

See Fig. 2: The vertical part of a tunnel ventilation and noise reduction device based on resistive energy absorption, including vertical noise reduction channel 13, sound-absorbing filling material 3, phenolic glass fiber 5, rubber shock-absorbing layer 4, valve 6 and blower 7.

The vertical sound-absorbing channels 13 are vertically arranged side by side in the vertical part of the ventilation and sound-absorbing devices. The size and arrangement of the material 3 are determined by the specifications of the actual vertical silencing channels 13, so that they can fully fill the gaps between adjacent vertical silencing channels 13 and between the vertical silencing channels 13 and the phenolic glass fiber 5 ; The phenolic glass fiber layer 5 is bonded to the inner side of the vertical part of the tunnel ventilation and muffler device, and is fully in contact with the sound-absorbing filling material 3 so as to effectively prevent noise from spreading; The vibration of the tunnel ventilation and noise reduction device itself reduces the noise in the cavity; the upper ends of the two vertical parts of the tunnel ventilation and noise reduction device are equipped with valves 6, which adapt to its control function by changing the size of the flow surface of the tuyere. Blower 7 , the operation of blower 7 draws dirty air from inside the tunnel 12 to the outside of the shaft or tunnel 12 .

In order to increase the number of reflections of sound waves in the vertical sound-absorbing passage 13, the vertical sound-absorbing passage 13 is bent, which increases the chance of contact between the sound wave and the sound-absorbing filling material 3 and improves the sound-absorbing effect; the bending of the vertical sound-absorbing passage 13 is Opaque is the principle, in order to ensure the aerodynamic performance, the angle θ≤20° between the entrance inner wall of any vertical sound-absorbing channel (13) and the vertical, and the width is preferably 250mm.

The valve 6 above the silencer channel has manual and electric movement modes, and can also be set to move according to a predetermined program under the action of other forms of sensing signals such as pressure and temperature to adapt to different control requirements. According to the wind pressure intensity of the actual environmental conditions of the tunnel, the blower 7 of the corresponding specification is selected.

See Fig. 2: The transverse part of a tunnel ventilation and muffler device based on resistive energy absorption, including a transverse muffler channel 2, a muffler 8, phenolic glass fiber 5, a rubber damping layer 4, an air inlet 9 and a gas filter layer 10.

The inner side of the transverse part of the ventilation and muffler channel is bonded with phenolic fiber glass 5 , and the muffler parts 8 are bonded and fixed on the phenolic glass fiber layer 5 in the form of plates, which are arranged staggered up and down in the transverse muffler channel 2 with a distance of 100-150 mm. Thereby, the moving path of the sound wave and the contact area between the sound wave and the sound-absorbing member 8 are increased. The plate width of the sound-absorbing part 8 is 60-80mm, the plate length is taken as the actual width of the transverse sound-absorbing channel 2, and the plate height is taken as 0.6 times the height of the transverse sound-absorbing channel 2; And sound insulation cotton etc. A plurality of air inlets 9 are arranged at the lower part of the transverse part of the ventilation and sound-absorbing channel device, and the gas filter layer 10 is closely attached to the upper part of the air inlets. The outer side of the lateral part of the muffler is bonded with a rubber shock-absorbing layer 4, which reduces the noise in the cavity by absorbing the vibration of the tunnel ventilation muffler itself

The spacing of the air inlet 9 in the lateral part of the ventilation and sound-absorbing passage should be reasonably arranged according to the actual environmental conditions of the tunnel 12, preferably 40-60m, and the spacing can be appropriately reduced in the harsh environment of the tunnel.

The gas filter layer 10 is nested in the air inlet, filled with filter screen and fiber filter material, and the thickness is 50-80mm.

See Figure 2: The inner walls of the horizontal part and the vertical part of a tunnel ventilation and muffler device based on resistive energy absorption are bonded with a phenolic glass fiber layer 5 by glass fiber special glue, and the thickness of the phenolic glass fiber layer 5 is 70- 90mm; the outer walls of the horizontal part and the vertical part of the tunnel ventilation and noise reduction device are bonded with a rubber shock-absorbing layer 4 through rubber adhesive, and the thickness of the rubber shock-absorbing layer is 80-100mm.

The specific implementation process:

The blower 7 and the valve 6 are started, and the dirty air and noise of the tunnel 12 enter the tunnel ventilation and muffler through the air inlet 9, and filter out larger particles and dust through the gas filter layer 10, and the gas and noise enter the lateral part of the ventilation and muffler, and pass through The labyrinth-shaped silencer channel 2 composed of sound-absorbing parts 8, the noise and the sound-absorbing parts 8 are in constant contact and reflection to absorb low and intermediate frequency noise; then the gas and noise pass through the curved vertical sound-absorbing channel 2 in the vertical part, and pass through The sound-absorbing filling material 3 and the phenolic glass fiber layer 5 work together to continuously absorb the noise that radiates to the inner wall of the device to achieve the purpose of absorbing medium and high-frequency sounds; the gas and noise after the sound attenuation and sound absorption are finally discharged to the The shaft or tunnel 12 is external. During the whole sound-absorbing process, the rubber shock-absorbing layer 4 continuously suppresses the vibration and dynamic deformation of the main body of the device, realizing the ventilation and sound-absorbing function of the entire section of the tunnel.

The materials used in the utility model are all common materials, and the construction is convenient, the structure is simple, and the cost of materials and engineering equipment is greatly reduced; the utility model realizes the ventilation and noise reduction function of the whole section of the tunnel, and greatly reduces the fan impeller produced in the tunnel ventilation process. Rotation noise, gas flow noise and vibration noise of the ventilation pipe itself; the utility model arranges resistive materials reasonably, can effectively eliminate noise pollution of different frequencies in the tunnel, and is suitable for different tunnel environments.

The above content is a further detailed description of the method of the utility model in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the method of the utility model is limited thereto. For those of ordinary skill in the technical field to which the utility model belongs, those who make several equivalent substitutions or obvious modifications without departing from the concept of the utility model, and have the same performance or use, should be deemed to belong to the utility model submitted by the The scope of patent protection determined by the claims.

Claims (10)

1. A tunnel ventilation and noise reduction device based on resistive energy absorption, characterized in that it comprises a horizontal part and a vertical part installed in the tunnel (12), the two ends of the horizontal part communicate with the lower end of a vertical part respectively, and the horizontal part Part and the inner wall of the vertical part are bonded with a phenolic glass fiber layer (5); the vertical part is provided with a blower (7), a valve (6) and several parallel vertical To the sound-absorbing passage (13), between the adjacent vertical sound-absorbing passages (13), between the vertical sound-absorbing passage (13) and the phenolic glass fiber layer (5) are all filled with sound-absorbing filling materials (3); A sound-absorbing member (8) is arranged in the transverse sound-absorbing channel (2), and the sound-absorbing member (8) is bonded to the surface of the phenolic glass fiber layer (5), and an air inlet (9) is arranged in the lower part of the transverse part. 2. A kind of tunnel ventilation silencing device based on resistive energy absorption according to claim 1, characterized in that, the vertical silencing channel (13) is arranged in the vertical part in a continuous bent shape; the silencing member (8 ) are installed in the horizontal sound-absorbing channel (2) in the form of plates staggered up and down. 3. A kind of tunnel ventilation and noise reduction device based on resistive energy absorption according to claim 2, characterized in that, the angle θ≤20° between the entrance inner wall of any vertical noise reduction passage (13) and the vertical, and the width is 250-450mm. 4. A kind of tunnel ventilation and silencing device based on resistive energy absorption according to claim 2, is characterized in that, the silencing piece (8) of transverse silencing channel (2) is wide 60-80mm, and is long as transverse silencing channel ( 2) The actual width and height are 0.5-0.7 times of the height of the transverse sound-absorbing channel (2). The outside of the sound-absorbing part (8) is a sound-absorbing panel, and the inner filling includes glass fiber cotton, foamed rubber and sound-insulating cotton. 5. A tunnel ventilation and noise reduction device based on resistive energy absorption according to any one of claims 1-4, characterized in that, the outer walls of the lateral part and the vertical part are bonded with rubber Shock layer (4), the thickness of the rubber shock-absorbing layer is 80-100mm. 6. A kind of tunnel ventilation and noise reduction device based on resistive energy absorption according to claim 1, characterized in that, the air inlet (9) of the transverse part is 40-60m along the longitudinal spacing of the tunnel (12), and the air inlet ( 9) is provided with a gas filter layer (10) on the upper part. 7. A tunnel ventilation and noise reduction device based on resistive energy absorption according to claim 6, characterized in that, the gas filter layer (10) comprises a filter net and a fiber filter material, with a thickness of 50-80mm. 8. According to claim 1 or 2 or 3 or 4 or 6 or 7, a tunnel ventilation and noise reduction device based on resistive energy absorption is characterized in that the transverse part of the tunnel ventilation and noise reduction device is along the inner top of the tunnel (12) Arranged longitudinally, the upper end of the vertical part extends to the shaft of the tunnel (12) or outside of the tunnel (12). 9. A kind of tunnel ventilation and noise reduction device based on resistive energy absorption according to claim 8, characterized in that, the ventilation and noise reduction device is connected with the inner top of the tunnel (12) through the fixed pendant (11) at the top of the transverse part; The distance between the top of the transverse part of the silencer and the top of the inner side of the tunnel (12) is greater than or equal to 300mm. 10. A kind of tunnel ventilation and noise reduction device based on resistive energy absorption according to claim 1, characterized in that, the phenolic glass fiber layer (5) is bonded to the horizontal part and the vertical section of the tunnel ventilation and noise reduction device by glass fiber special glue. Part of the inner wall, the thickness of the phenolic glass fiber layer (5) is 70-90mm.