CN219653877U - Integral prefabricated sound absorption cover plate - Google Patents

Abstract

The utility model discloses an integral prefabricated sound-absorbing cover plate which comprises a cover plate body and sound-absorbing plates, wherein a plurality of grooves are respectively arranged on two sides of a track in a railway tunnel, the cover plate body is detachably fastened on the grooves on the same side of the track, sound-absorbing holes are formed in the cover plate body, the sound-absorbing holes are respectively corresponding to and communicated with the grooves, and the sound-absorbing plates are vertically fixed at one end of the cover plate body, which is close to the track. The cover plate body can simultaneously block a plurality of grooves on one side of the track, the cover plate body is provided with the sound absorption holes, the sound absorption holes and the grooves which correspond to and are communicated with the sound absorption holes form a resonance sound absorption structure, and low-frequency noise after reflection of the lining of the tunnel is effectively absorbed; the cover plate body is close to the vertical acoustic board that is fixed with of orbital one end, and the acoustic board can absorb the high frequency sound wave that first propagation was come on the track.

Description

Integral prefabricated sound absorption cover plate

Technical Field

The utility model relates to the field of railway tunnels, in particular to an integral prefabricated sound absorption cover plate.

Background

Research shows that higher running speeds will lead to problems of increased track action, increased vibration noise and aerodynamic noise of the line infrastructure. When the train runs at a high speed in the tunnel, the tunnel lining, the track bed and the auxiliary structures are mostly made of concrete materials with extremely low sound absorption coefficient, and at the moment, the semi-closed tubular structure is formed to cause wheel track vibration sound waves, car body pneumatic sound waves, bow net friction sound waves and the like generated by the train to exacerbate the reverberant sound in the tunnel after multiple reflections, so that the noise in the tunnel is generally 10-20dB higher than the noise outside the tunnel. It is expected that the noise in the tunnel will be significantly enhanced at 400 km per hour, causing serious harm to passengers on the vehicle and operators in the tunnel, and also having great influence on the tunnel structure and vehicle body structure. At present, the railway tunnel is not provided with noise reduction measures in the tunnel, and the sound absorption spraying material commonly used in the road tunnel is not suitable for strong train wind and train induced vibration environment conditions of the railway tunnel; the noise reduction requirement in the vehicle cannot be met by simply improving the sound insulation performance of the vehicle. Therefore, in order to reduce noise in a train passing through a tunnel and improve comfort of passengers, it is necessary to study noise reduction measures in a tunnel at a speed of 400 km per hour.

Because the high-speed railway noise source is mainly concentrated at the lower part of the vehicle, sound absorption and noise reduction measures are implemented at the position relatively close to the lower main sound source, and the high-speed railway noise source has higher technical economy.

Therefore, how to provide an integral prefabricated sound absorbing cover plate, so that the above problems can be overcome, is a problem that needs to be solved by those skilled in the art.

Disclosure of Invention

In view of this, the present utility model provides an integral prefabricated acoustical panel.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides an integral prefabricated sound absorption apron, includes apron body and acoustic baffle, is provided with a plurality of slots respectively in railway tunnel track both sides, the apron body is removable to be detained simultaneously and is established a plurality of that is located track is with one side on the slot, set up on the apron body and inhale the sound hole, a plurality of inhale the sound hole respectively with a plurality of slot position corresponds and communicates, the apron body is close to orbital one end is vertical to be fixed with the acoustic baffle.

Compared with the prior art, the utility model discloses an integral prefabricated sound absorption cover plate, wherein the cover plate body can simultaneously block a plurality of grooves on one side of a track, sound absorption holes are formed in the cover plate body, and the sound absorption holes and the grooves which correspond to and are communicated with the sound absorption holes form a resonance sound absorption structure, so that low-frequency noise after being reflected by a lining of a tunnel is effectively absorbed; the cover plate body is close to the vertical acoustic board that is fixed with of orbital one end, and the acoustic board can absorb the high frequency sound wave that first propagation was come on the track.

Preferably, a plurality of grooves on the same side of the track are integrally formed with a limiting groove, a plurality of grooves on the same side of the track are all penetrated through the groove bottom wall of the limiting groove, the lower plate surface of the cover plate body is integrally formed with a limiting block, the limiting block is embedded into the limiting groove, and the sound absorbing hole penetrates through the limiting block and then is communicated with the inside of the groove. The design of spacing groove and stopper, this setting ensures that the apron body can detain reliably and establish on the slot, avoids it to take place to remove dislocation.

Preferably, the sound absorbing plate is a rectangular plate, the plate thickness of the sound absorbing plate is 2 cm, the groove depth of the limiting groove is 6 cm, and the thickness of the limiting block is smaller than or equal to the groove depth of the limiting groove. This arrangement ensures the sound absorption effect of the sound absorbing panel and the stopper can be reliably fitted into the stopper groove.

Preferably, the sound absorbing holes have a circular or polygonal cross-sectional shape. The sound absorbing hole has a cross-sectional shape that can affect the sound absorbing effect, and the sound absorbing hole has a cross-sectional shape that can ensure the sound absorbing effect.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of the arrangement of an integral prefabricated sound absorbing cover panel within a railway tunnel;

fig. 2 is a partial enlarged view at a in fig. 1.

In the figure:

the sound absorption plate comprises a cover plate body 1, a sound absorption hole 10, a limit block 11, a sound absorption plate 2, a railway tunnel 3, a track 4, a water tank 5, a cable tank 6 and a limit tank 7.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model discloses an integral prefabricated sound-absorbing cover plate, wherein a cover plate body 1 can simultaneously block a plurality of grooves on one side of a track 4, sound-absorbing holes 10 are formed in the cover plate body 1, the sound-absorbing holes 10 and the grooves which correspond to and are communicated with the sound-absorbing holes form a resonance sound-absorbing structure, and low-frequency noise after being reflected by a lining of a tunnel is effectively absorbed; the sound absorbing plate 2 is vertically fixed at one end of the cover plate body 1, which is close to the track 4, and the sound absorbing plate 2 can absorb high-frequency sound waves which are transmitted on the track 4 for the first time; through the design of spacing groove 7 and stopper 11, this setting ensures that apron body 1 can detain reliably and establish on the slot, avoids it to take place to remove dislocation.

Examples

Referring to fig. 1-2, which are schematic views of the whole and part of the structure of an embodiment of the utility model, the utility model specifically discloses an integral prefabricated sound absorption cover plate, which comprises a cover plate body 1 and a sound absorption plate 2, wherein the cover plate body 1 and the sound absorption plate 2 are prefabricated by adopting porous sound absorption materials, the porous sound absorption materials comprise, but are not limited to, cement expanded perlite, HA ceramsite, polycrystalline sand and the like, and the porous materials can effectively absorb medium-high frequency noise generated in a wheel track area in a tunnel.

A plurality of grooves are respectively arranged on two sides of a track 4 in a railway tunnel 3, each groove comprises a water groove 5 and a cable groove 6, each side of the track 4 is provided with two water grooves 5 and one cable groove 6, the cable groove 6 is arranged between the two water grooves 5, a rectangular limit groove 7 is arranged at the top of each of the two adjacently arranged water grooves 5 and one cable groove 6, the two water grooves 5 and one cable groove 6 jointly penetrate through the groove bottom wall of the limit groove 7, a limit block 11 is formed on the lower plate surface of the rectangular cover plate body 1 in a centering and integrating manner, the limit block 11 is embedded into the limit groove 7, the limit grooves 7 and the limit blocks 11 are arranged for ensuring that the cover plate body 1 can be reliably buckled on the plurality of grooves, the cover plate body 1 in the utility model is detachably fastened on a plurality of grooves on the same side of the track 4, the cover plate body 1 is provided with the sound absorbing holes 10, the sound absorbing holes 10 penetrate through the limiting blocks 11 and correspond to the grooves in position and are communicated with the inside, the section of each sound absorbing hole 10 is round or polygonal, the section of each sound absorbing hole 10 is cross-shaped, the sound absorbing holes 10 and the grooves corresponding to the sound absorbing holes in position and communicated with each other form a resonance sound absorbing structure, and the depth of the grooves is large so as to effectively absorb low-frequency noise after lining reflection in a tunnel, and the perforation rate of each sound absorbing hole 10 is kept within a range of 20% -50%. The cover plate body 1 is close to the vertical acoustic board 2 that is fixed with of one end of track 4, and the acoustic board 2 can absorb the high frequency sound wave that first propagates on the track 4.

The sound absorbing plate 2 is a rectangular plate, the plate thickness of the sound absorbing plate 2 is 2 cm, the groove depth of the limiting groove 7 is 6 cm, and the thickness of the limiting block 11 is smaller than or equal to the groove depth of the limiting groove 7.

In the using process of the sound absorption cover plate, besides buckling and plugging the grooves, the sound absorption holes 10 and the grooves corresponding to and communicated with the positions of the sound absorption holes form a resonance sound absorption structure, so that low-frequency noise after reflection of the lining of the tunnel is effectively absorbed; the cover plate body 1 is close to the vertical acoustic board 2 that is fixed with of one end of track 4, and the acoustic board 2 can absorb the high frequency sound wave that first propagates on the track 4.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. The utility model provides an integral prefabricated sound absorption apron, its characterized in that, including apron body (1) and acoustic baffle (2), both sides of track (4) are provided with a plurality of slots respectively in railway tunnel (3), apron body (1) is removable to be detained simultaneously and is established a plurality of being located on the same side of track (4) on the slot, sound absorption hole (10) have been seted up on apron body (1), a plurality of sound absorption hole (10) respectively with a plurality of slot position corresponds and communicates, apron body (1) is close to the one end of track (4) is vertical to be fixed with acoustic baffle (2).

2. The integrated prefabricated sound absorption cover plate according to claim 1, wherein a limiting groove (7) is integrally formed in a plurality of grooves on the same side of the track (4), the grooves on the same side of the track (4) penetrate through the groove bottom wall of the limiting groove (7), a limiting block (11) is integrally formed in the lower plate surface of the cover plate body (1), the limiting block (11) is embedded into the limiting groove (7), and the sound absorption holes (10) penetrate through the limiting block (11) and then are communicated with the inside of the grooves.

3. The integrated prefabricated sound absorption cover plate according to claim 2, wherein the sound absorption plate (2) is a rectangular plate, the plate thickness of the sound absorption plate (2) is 2 cm, the groove depth of the limiting groove (7) is 6 cm, and the thickness of the limiting block (11) is smaller than or equal to the groove depth of the limiting groove (7).

4. An integrated prefabricated sound absorbing cover panel according to claim 1, characterized in that the sound absorbing holes (10) have a circular or polygonal cross-sectional shape.