CN215051652U - Sound-absorbing walking cover plate mechanism for trapezoidal track - Google Patents

Abstract

The utility model relates to a trapezoidal track is with adsorbable sound walking apron mechanism sets up on the cavity in the middle of trapezoidal sleeper, including concrete cavity, walking apron, aluminium fiberboard and microperforated panel, the concrete cavity is open-top's box, the top at the box is fixed to the walking apron, aluminium fiberboard sets up in walking apron below, the microperforated panel sets up in the concrete cavity, is located aluminium fiberboard below, forms two sound-absorbing chambers in microperforated panel's upper and lower both sides. Compared with the prior art, the utility model has the advantages of can provide the walking space for constructor, can reduce train noise again.

Description

Sound-absorbing walking cover plate mechanism for trapezoidal track

Technical Field

The utility model belongs to the technical field of the track construction technique and specifically relates to a trapezoidal track is with can inhale sound walking apron mechanism is related to.

Background

In the design process of the existing high-vibration-reduction track bed, a frame type track bed structure (such as a trapezoidal sleeper track bed) is adopted by a plurality of track beds, and the track beds are used for improving the replaceability of elastic elements below a track bed plate and the convenience of cleaning a sewer below the track bed plate. However, the space in the middle of the frame-type track bed brings inconvenience to the overhaul and the walking of constructors.

Meanwhile, in the running process of the train, particularly through a tunnel section, noise generated in the tunnel by the train is continuously reflected in the closed space and is transmitted into the carriage through a train body, a vehicle window, a floor and the like, so that the riding comfort of passengers is influenced. In addition, when a train passes through a small-radius curve track, part of a large amount of noise generated between wheel tracks is continuously reflected between a vehicle chassis and the track slab, the track slab is mostly made of concrete and does not have good sound absorption characteristics, the noise is transmitted into a carriage through a car floor in the reflection process, the riding comfort of passengers is affected, and at present, some sound absorption materials are usually arranged on the track bed to reduce the noise of train operation, but the common sound absorption and noise reduction materials comprise glass wool, asbestos, rock wool, metal fiber materials and the like. The rock wool/glass wool sound absorption material has no strength, is easy to damp and basically does not absorb sound after being damped. The environment is polluted by easy aging, rock wool dust can volatilize in 2-3 years under certain service conditions, and the pollution is serious in average less than ten years.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a trapezoidal track is with can inhaling walking apron mechanism in order to overcome the defect that above-mentioned prior art exists, can provide the walking space for the constructor, can reduce the train noise again.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a trapezoidal track is with adsorbable sound walking apron mechanism, sets up on the cavity in the middle of trapezoidal sleeper, including concrete cavity, walking apron, aluminium fiberboard and microperforated panel, the concrete cavity is open-ended box, the top at the box is fixed to the walking apron, the aluminium fiberboard sets up in walking apron below, the microperforated panel sets up in the concrete cavity, is located the aluminium fiberboard below, forms two sound-absorbing chambers in the upper and lower both sides of microperforated panel.

Furthermore, the micro-perforated plate is formed by laminating and combining single-layer or multi-layer perforated plates, and the aperture ratio of the holes on each layer of perforated plate are different.

Further, the micro-perforated plate is a corrugated plate.

Further, the micro-perforated plate is a wedge-shaped wave plate.

Further, the micro-perforated plate is a protruding thorn-shaped plate.

And furthermore, the aluminum fiber plate comprises an upper top column and a lower top column, wherein the upper top column is positioned on two sides between the aluminum fiber plate and the micro-perforated plate, and the lower top column is positioned on two sides between the micro-perforated plate and the bottom plate of the concrete cavity.

Furthermore, the upper support pillar and the lower support pillar are both hard rubber support pillars.

Furthermore, the walking cover plate is made of hard plastic and is provided with a honeycomb-shaped through hole structure on the surface.

Furthermore, grooves are formed in the periphery of the top end of the concrete cavity, and four sides of the walking cover plate are embedded into the grooves.

Further, still include the elastomer, this elastomer is rectangular form rubber material, sets up between walking apron and aluminium fiber board, and top and bottom contact walking apron and aluminium fiber board respectively.

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

1. the utility model combines the sound absorption structure with the walking function of the cover plate, is arranged on the cavity in the middle of the trapezoidal sleeper, can absorb the wheel track noise on the track plate, and also realizes the function of the railway maintainer walking in the middle of the track plate; meanwhile, good sound absorption performance can be kept in dust and moisture environments such as tunnels, and the installation is convenient and rapid.

2. The utility model arranges the aluminum fiber board and the micro-perforated plate in the concrete cavity, realizes low-frequency sound absorption by the micro-perforated plate, and realizes medium and high-frequency sound absorption by the porous aluminum fiber; meanwhile, the porous aluminum fibers can also prevent dust from entering the concrete cavity from the holes of the upper walking cover plate, so that the dust-proof effect is achieved.

3. The micro-perforated plate can adopt a multi-layer perforated plate composite structure with different apertures and different perforation rates, and the width of a sound absorption frequency band is enlarged.

4. The micro-perforated plate can be of a wave plate, wedge-shaped or spike-shaped structure and the like, the contact area of the sound absorption plate and air is increased, multiple reflections of sound waves can occur between the wedges, multiple sound absorption is achieved, and the sound absorption effect is improved.

5. The surface of the walking cover plate is provided with a honeycomb-shaped through hole structure, and based on the bionic principle, the noise is ensured to enter the sound absorption structure through the holes on the walking cover plate, meanwhile, the structural strength is also ensured, and the material is saved. Meanwhile, the walking cover plate bears the vertical pressure brought by the walking of the personnel and protects the internal sound absorption structure.

Drawings

Fig. 1 is a schematic view of an installation structure of the first embodiment.

Fig. 2 is a perspective view of the first embodiment.

Fig. 3 is a schematic diagram of an explosive structure according to the first embodiment.

Fig. 4 is a schematic cross-sectional structure diagram of the first embodiment.

Fig. 5 is a schematic perspective view of a microperforated panel according to a second embodiment.

Fig. 6 is a schematic side view of a microperforated panel of example two.

Fig. 7 is a schematic cross-sectional structure diagram of the third embodiment.

Fig. 8 is a schematic perspective view of a microperforated panel of example three.

Reference numerals: 1. concrete cavity, 2, walking apron, 3, aluminium fiberboard, 4, microperforated panel, 5, last fore-set, 6, lower fore-set, 7, elastomer, 8, trapezoidal sleeper.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Example one

The embodiment provides a sound-absorbing walking cover plate mechanism for the trapezoidal track, which is arranged on a cavity in the middle of a trapezoidal sleeper 8, as shown in figure 1. The structure is shown in FIGS. 2-4. The sound absorption device is functionally divided into an outer structure composition support and an inner sound absorption composition. Structurally, the micro-perforated plate mainly comprises a concrete cavity 1, a walking cover plate 2, an aluminum fiber plate 3, a micro-perforated plate 4, an upper top column 5, a lower top column 6 and an elastic body 7. The concrete cavity 1 is a box body with an opening at the top end and is formed by pouring reinforced concrete, and grooves are formed in the upper ends of four concrete cavities around the cavity and used for mounting the walking cover plate 2. The walking cover plate 2 is a rigid plastic walking cover plate 2, the surface of which is provided with a honeycomb-shaped through hole structure, and the walking cover plate is designed in a bionic manner to imitate the hexagon of a honeycomb. This structure has guaranteed that walking apron mechanism can bear vertical pressure, can make the noise enter into the sound absorption intracavity through walking apron 2 as far as.

The aluminum fiber plate 3 is arranged below the walking cover plate 2, and the micro-perforated plate 4 is arranged below the aluminum fiber plate 3. The upper top columns 5 are positioned at two sides between the aluminum fiber plate 3 and the micro-perforated plate 4; the lower top pillars 6 are positioned at two sides between the micro-perforated plate 4 and the bottom plate of the concrete cavity 1; the elastic body 7 is arranged between the running deck 2 and the aluminum fiberboard 3 to thereby form a fixation. The upper support pillar 5 and the lower support pillar 6 are both hard rubber support pillars with variable height and are cuboid, cylinder or various simple and practical shapes. The concrete cavities 1 of the upper top column 5 and the lower top column 6 are connected by rivets. Elastomer 7 is rectangular rubber of rectangular strip, has elasticity, and elastomer 7 is pasted in walking apron 2 lower surface edge with the glue, and upper and lower both ends are compressed slightly by walking apron 2 and aluminium fiberboard 3 and are played the effect of buffering. Thereby forming two sound-absorbing chambers on the upper and lower sides of the microperforated panel 4. Wherein, microperforated panel 4 forms the helmholtz resonance chamber with the sound-absorbing chamber of lower part thereby improves sound absorption performance. The thickness of the sound absorption cavity can be adjusted according to actual working conditions, and the installation heights of the aluminum fiber plate 3 and the micro-perforated plate 4 are changed through the heights of the upper top column 5 and the lower top column 6, so that the purpose of adjusting the sound absorption thickness of the air cavity under the two plates is achieved.

The aluminum fiber board 3 made of the aluminum fiber and the aluminum mesh in this embodiment has excellent physicochemical properties such as corrosion resistance, high temperature resistance, and water repellency. The literature "material properties and applications of aluminium fibre sound-absorbing panels" articles of jade, mo shao. material properties and applications of aluminium fibre panels 3 sound-absorbing panels [ J ]. novel building materials, 200011: 18-22, it was concluded that water and dust had little effect on the sound absorption coefficient of the aluminum fiber panel 3. It was thus verified that the aluminum fiber sheet 3 can simultaneously exert the dust-proof and suction effects.

The micro-perforated plate 4 in this embodiment is a single-layer wedge-shaped wave structure. The wedge structure can form a transition region between air and the sound absorption material, and the equivalent acoustic impedance of the wedge is gradually increased from the air to the sound absorption material, so that sound waves can enter the sound absorption material; meanwhile, the wedge structure increases the surface area of sound absorption, and sound waves can be reflected for multiple times between the wedges, so that the sound absorption efficiency is effectively improved.

In conclusion, the embodiment performs sound absorption processing on the noise generated by the wheel rail in the sound absorption structure of the mechanism of the traveling cover plate 2, combines the sound absorption structure with the traveling function of the cover plate, absorbs sound at low frequency by using the micro-perforated plate 4, absorbs sound at medium and high frequency in the porous aluminum fiber absorption structure, realizes the sound absorption effect on the wider frequency band of the wheel rail noise, designs the micro-perforated plate 4 into a wedge shape, improves the sound absorption coefficient by using the principle of the wedge structure, and prevents dust from entering the concrete cavity 1 by using the aluminum fiber plate 3. The concrete cavity 1 and the walking cover plate 2 are combined into a whole, so that noise can enter the concrete cavity 1, and the walking requirement of personnel is met.

Example two

The overall structure of this embodiment is the same as that of the first embodiment, and the difference is that the micro-perforated plate 4 in this embodiment is composed of two layers of perforated plates, as shown in fig. 5 and 6, the upper layer is composed of multiple rows of wedge-shaped protrusions, i.e., a spike-shaped plate, and the lower layer is a flat plate. The hole diameters and the perforation rates of the perforated plates of the upper layer and the lower layer are different, so that noise elimination of noise with different frequencies is achieved. At the same time, the spike-like panels increase the sound absorption area over a limited panel area.

EXAMPLE III

The overall structure of this embodiment is the same as that of the first embodiment, except that the microperforated panel 4 in this embodiment is composed of three layers of perforated panels, as shown in fig. 7 and 8: the upper layer and the middle layer are wave-shaped plates, and the wave radian of the upper layer is greater than that of the middle layer; the lower layer is a flat plate. The three layers of perforated plates have different hole diameters and perforation rates so as to achieve the noise elimination of noises with different frequencies. Meanwhile, the multilayer wave shape increases the sound absorption area over a limited panel area.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. The utility model provides a trapezoidal track is with adsorbable sound walking apron mechanism, its characterized in that sets up on the cavity in the middle of trapezoidal sleeper (8), including concrete cavity (1), walking apron (2), aluminium fiberboard (3) and microperforated panel (4), concrete cavity (1) is open-topped box, the top at the box is fixed in walking apron (2), aluminium fiberboard (3) set up in walking apron (2) below, microperforated panel (4) set up in concrete cavity (1), are located aluminium fiberboard (3) below, form two sound-absorbing chambers in the upper and lower both sides of microperforated panel (4).

2. The cover plate mechanism capable of walking with sound absorption for the trapezoid track as claimed in claim 1, wherein the micro-perforated plate (4) is formed by laminating single-layer or multi-layer perforated plates, and the hole diameter and the hole opening rate of the holes on each layer of perforated plate are different.

3. The cover plate mechanism for ladder-shaped track with sound absorption function as claimed in claim 1, wherein the micro-perforated plate (4) is a wave plate.

4. The cover plate mechanism for walking with sound absorption of trapezoid track of claim 1, wherein the micro perforated plate (4) is a wedge-shaped wave plate.

5. The cover plate mechanism for ladder-shaped rail capable of absorbing sound according to claim 1, wherein the micro-perforated plate (4) is a plate with thorns.

6. The cover plate mechanism capable of walking with sound absorption for the trapezoid track as claimed in claim 1, which comprises an upper top pillar (5) and a lower top pillar (6), wherein the upper top pillar (5) is located at two sides between the aluminum fiber plate (3) and the micro-perforated plate (4), and the lower top pillar (6) is located at two sides between the micro-perforated plate (4) and the bottom plate of the concrete cavity (1).

7. The cover plate mechanism for the trapezoidal track capable of absorbing the sound according to claim 6, wherein the upper support pillar (5) and the lower support pillar (6) are both hard rubber support pillars.

8. The cover plate mechanism for the ladder-shaped track with the sound absorption function is characterized in that the walking cover plate (2) is a rigid plastic walking cover plate (2), and the surface of the walking cover plate is provided with a honeycomb-shaped through hole structure.

9. The cover plate mechanism capable of absorbing sound for the trapezoidal track as claimed in claim 1, wherein a groove is formed around the top end of the concrete cavity (1), and four sides of the walking cover plate (2) are embedded into the groove.

10. The cover plate mechanism capable of absorbing sound for the trapezoidal track according to claim 1, further comprising an elastic body (7), wherein the elastic body (7) is made of long strip rubber material and is arranged between the walking cover plate (2) and the aluminum fiber plate (3), and the top and the bottom of the elastic body are respectively contacted with the walking cover plate (2) and the aluminum fiber plate (3).

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