Vibration reduction fastener for urban rail transit turnout zone

Abstract

The invention relates to the technical field of rail transit engineering vibration reduction, and discloses a vibration reduction fastener for an urban rail transit turnout zone, which is arranged on sleepers in the turnout zone and comprises an iron base plate arranged above two adjacent sleepers in the front-back direction, a plurality of first foundation bolt mounting holes and corresponding foundation bolts are arranged on the iron base plate, and a plurality of second foundation bolt mounting holes are formed in the iron base plate. A slide plate is fixedly arranged on the inner side of the upper portion of the iron base plate, a switch rail is slidably arranged on the slide plate, an elastic strip mounting seat and a buckling component are fixedly arranged on the outer side of the upper portion of the iron base plate, a stock rail is arranged between the elastic strip mounting seat and the slide plate, the inner side of the rail bottom of the stock rail abuts against the slide plate, and the outer side of the rail bottom of the stock rail is fixed through the buckling component. A particle damping vibration attenuation box is arranged on the outer side wall of the stock rail and filled with particles used for collision energy dissipation, and a particle damping vibration attenuation structure is formed. Vibration energy generated when a train passes through a turnout is consumed through collision and friction of particles in the vibration reduction box, and the purpose of vibration reduction is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration reduction in rail transit engineering, and more particularly to a vibration reduction fastener used in a turnout area of ​​urban rail transit. Background Art

[0002] When urban rail transit trains pass through the turnout, the train wheels will impact the front end of the pointed rail. On the one hand, this impact vibration will cause wear and damage to the track structure and shorten the service life of the equipment. On the other hand, the vibration will be transmitted to the surrounding area, causing adverse effects on the daily life of residents. At present, the track vibration reduction fasteners mostly use elastic buffer pads to reduce the stiffness of the fasteners, thereby absorbing and dispersing the impact energy. However, when the train passes the turnout sideways, it will generate a large lateral force. When the stiffness of the fastener is low, it will cause the turnout basic rail to deflect, which will have an adverse effect on the stability of the turnout structure. In addition, the environment of the urban rail transit section is closed, the humidity is high, and there are many heat sources. In this environment, the vibration reduction equipment is subjected to the train load for a long time. The elastic buffer pad will often produce certain fatigue phenomena, its vertical stiffness will increase, and the vibration reduction effect will decrease.

[0003] As a new type of vibration reduction technology, particle damping technology consumes the vibration energy of the system through mutual friction and collision between particles. It has the characteristics of good durability, high reliability, insensitivity to temperature changes, and wide applicable frequency range.

[0004] Therefore, how to use particle damping technology to improve the durability and safety of the rail system's vibration and noise reduction system has become a technical problem that technical personnel in this field need to solve. Summary of the invention

[0005] In view of this, the present invention provides a vibration-damping fastener for use in a switch area of ​​urban rail transit. By rationally arranging and spatially dividing the vibration-damping fastener, a particle damping vibration-damping box is installed on the outer side of the basic rail in the switch area. The vibration energy of the train when passing through the switch is consumed through the collision and friction of particles in the particle damping vibration-damping box, thereby achieving the purpose of vibration reduction.

[0006] To achieve the above-mentioned purpose, the present invention provides a vibration-damping fastener for a turnout area of ​​urban rail transit, which is arranged on a sleeper in the turnout area, including an iron pad arranged above two adjacent sleepers in front and behind, the iron pad being provided with a plurality of first anchor bolt mounting holes, the first anchor bolt mounting holes being provided with corresponding anchor bolts for fixing the vibration-damping fastener on the sleeper, a slide bed being fixedly provided on an inner side above the iron pad, a point rail being slidably provided on the slide bed, a spring bar mounting seat being fixedly provided on an outer side above the iron pad, a basic rail being provided between the spring bar mounting seat and the slide bed, a buckling component for limiting the outer side position of the basic rail being provided in the spring bar mounting seat, the inner side of the bottom of the basic rail being in contact with the slide bed, and the outer side being fixed by the buckling component, a particle damping vibration-damping box being provided on the outer side wall of the basic rail, the particle damping vibration-damping box being closely fitted with the outer side jaw, rail waist and rail bottom area of ​​the basic rail close to the side of the basic rail, and the particle damping vibration-damping box being filled with particles for collision energy dissipation to form a particle damping vibration-damping structure.

[0007] Preferably, a vibration damping box fixing assembly is provided on the outer side wall of the particle damping vibration damping box, and the vibration damping box fixing assembly is used to fix the particle damping vibration damping box to the outer side area of ​​the basic rail between two adjacent front and rear sleepers. The vibration damping box fixing assembly includes a support arm provided on the outer side wall of the particle damping vibration damping box and a fixing plate provided at the bottom of the support arm, and second anchor bolt mounting holes are provided on the fixing plate and the iron pad, and corresponding anchor bolts are provided in the second anchor bolt mounting holes for fixing the vibration damping box fixing assembly and the iron pad.

[0008] Preferably, the retaining member includes an E-shaped spring bar and a limit block, and the E-shaped spring bar and the limit block are matched to limit the position of the outer side of the base rail.

[0009] Preferably, an under-plate pad layer is provided between the iron pad and the sleeper to prevent hard contact between the two, and the under-plate pad layer is provided with a plurality of third anchor bolt mounting holes corresponding to the first anchor bolt mounting holes for fixing the under-plate pad layer on the sleeper.

[0010] Preferably, the bottom plate layer is a polymer material isolation layer with a thickness of 1-2 mm; Preferably, a rail underlay plate layer is provided between the base rail and the iron plate to prevent hard contact between the two.

[0011] Preferably, the rail underlay layer is a polymer material isolation layer with a thickness of 8-10 mm.

[0012] Preferably, a cushion layer is provided at the contact position between the particle damping vibration reduction box and the stock rail.

[0013] Preferably, the particles used for collision energy dissipation are particles made of metal, ceramic or glass, and the particle diameter is 1 mm-4 mm.

[0014] It can be seen from the above technical solution that, compared with the prior art, the vibration-damping fastener for use in the turnout area of ​​urban rail transit disclosed in the present invention reasonably arranges and spatially divides the vibration-damping fastener structure, installs a particle damping vibration-damping box on the outer side of the basic rail in the turnout area, and fills the particle damping vibration-damping box with metal or non-metal particles for collision energy consumption to form a particle damping vibration-damping structure. Through the collision and friction of particles in the particle damping vibration-damping box, the vibration energy of the train when passing through the turnout is consumed, thereby achieving the purpose of vibration reduction, and the vibration reduction effect can reach more than 10dB. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0016] Figure 1 It is a front cross-sectional view of the vibration-damping fastener used in the turnout area of ​​urban rail transit according to the present invention.

[0017] Figure 2 It is a top view of the iron pad of the present invention.

[0018] Figure 3 It is a schematic diagram of the structure of the particle damping vibration reduction box and the vibration reduction box fixing assembly of the present invention.

[0019] Figure 4 It is a schematic diagram of the side structure of the vibration-damping fastener used in the turnout area of ​​urban rail transit of the present invention when it is installed on the sleeper.

[0020] Figure 5 It is a schematic diagram of the E-shaped elastic bar structure of the present invention.

[0021] In the figure, iron pad-1, first anchor bolt mounting hole-101, second anchor bolt mounting hole-102, pad layer under the plate-11, slide bed plate-2, basic rail-3, pad layer under the rail-31, point rail-4, particle damping vibration reduction box-5, vibration reduction box fixing assembly-51, support arm-511, fixing plate-512, spring bar mounting seat 6, spring bar-61, limit block-62, pad layer-7, sleeper-8. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Please refer to the attached Figure 1-5 , which is a vibration-damping fastener for use in a turnout area of ​​urban rail transit disclosed in the present invention.

[0024] The vibration-damping fastener for use in a turnout area of ​​urban rail transit provided by the present invention is arranged on a sleeper 8 in the turnout area, and includes an iron pad 1, a slide bed plate 2, a particle damping vibration-damping box 5, a vibration-damping box fixing assembly 51, a spring bar 61, and a limit block 62.

[0025] The iron pad 1 is placed above the two adjacent sleepers 8 in front and behind. The iron pad 1 is provided with a first anchor bolt mounting hole 101. The anchor bolts matching the first anchor bolt mounting hole 101 pass through the iron pad 1 in sequence and fix the vibration-damping fasteners on the sleeper 8. An under-plate pad layer 11 is provided between the iron pad 1 and the sleeper 8. The thickness of the under-plate pad layer 11 is preferably 1-2 mm. The under-plate pad layer 11 can prevent hard contact between the iron pad 1 and the sleeper 8, and can prevent the stray current on the track from causing electrical corrosion to the sleeper 8 structure. The under-plate pad layer 11 is also provided with a corresponding first anchor bolt mounting hole 101 for screwing the anchor bolt; preferably, the diameter of the first anchor bolt mounting hole 101 is 30-35 mm.

[0026] A slide bed plate 2 is fixedly arranged on the inner side above the iron pad 1, and a spring bar mounting seat 6 is fixedly arranged on the outer side. A basic rail 3 is arranged between the spring bar mounting seat 6 and the slide bed plate 2. The slide bed plate 2 is integrally welded to the iron pad 1, and a pointed rail 4 is arranged above the slide bed plate 2. The inner side of the bottom of the basic rail 3 abuts against the slide bed plate 2, and the outer side is fixed by a spring bar 61 and a limit block 62. The spring bar 61 and the limit block 62 constitute a buckling component and are installed on the spring bar mounting seat 6. A vibration damping box fixing assembly is arranged on the outer side wall of the particle damping vibration damping box 5. The vibration damping box fixing assembly 51 includes a support arm 511 arranged on the outer side wall of the particle damping vibration damping box 5 and a support arm 511 arranged at the bottom of the support arm 511. The fixing plate 512 is provided with a second anchor bolt mounting hole 102 on the iron pad 1 on the outer side of the basic rail 3. Preferably, the second anchor bolt mounting hole 102 has a diameter of 30-35 mm. The corresponding position on the fixing plate 512 is also provided with the same second anchor bolt mounting hole 102. The second anchor bolt mounting hole 102 is provided with a corresponding anchor bolt for fixing the connection between the fixing assembly and the iron pad 1. The particle damping vibration reduction box 5 is fixed to the outer area of ​​the basic rail 3 between the front and rear adjacent sleepers 8 through the vibration reduction box fixing assembly 51 and the iron pad 1; preferably, the iron pad 1 is 690-750 mm long, 450-500 mm wide, and 20 mm thick.

[0027] Two slide plates 2 arranged front and back are welded to the inner side of the iron pad 1 , and the pointed rail 4 is placed on the slide plate 2 . Lubricating grease is applied to the upper surface of the slide plate 2 to facilitate the sliding of the pointed rail 4 on the slide plate 2 .

[0028] The basic rail 3 is placed between the slide bed plate 2 and the mounting hole of the spring bar 61. The inner side of the base of the basic rail 3 is constrained by the slide bed plate 2, and the outer side of the basic rail 3 is constrained by the buckling component. The buckling component is fixedly mounted on the spring bar mounting seat 6, and includes an e-shaped spring bar 61 and its matching limit block 62. By replacing the limit blocks 62 of different models, the position of the basic rail 3 can be adjusted.

[0029] A rail underlay layer 31 is arranged between the base rail 3 and the iron base plate 1 , and the thickness is preferably 8-10 mm to avoid hard contact between the base rail 3 and the iron base plate 1 .

[0030] It should be noted that the sub-slab pad layer 11 and the sub-rail pad layer 31 are both polymer material isolation layers, including: resins such as resin coating, resin fiberglass, polyurethane waterproof coating, etc.; asphalts such as asphalt glass cloth and polymer modified asphalt roll; rubbers such as natural rubber and butyl rubber; polymer waterproof rolls such as EPDM waterproof rolls and polyethylene polypropylene polymer waterproof rolls; metals; asbestos boards, etc.

[0031] The particle damping vibration reduction box 5 is made of hollow metal. The particle damping vibration reduction box 5 can fit tightly with the lower jaw, rail waist and rail bottom area of ​​the outer side of the basic rail 3 near the basic rail 3. A cushion layer 7 is provided at the contact position between the vibration reduction box and the basic rail 3 to absorb and disperse impact energy.

[0032] The particle damping vibration reduction box 5 is filled with metal or non-metal particles for collision energy dissipation, such as fine particles of ceramic, glass and other materials, to form a particle damping vibration reduction structure. The vibration reduction effect of the vibration reduction fastener can reach more than 10dB; preferably, the particle diameter is 1mm-4mm.

[0033] The particle damping vibration reduction box 5 is provided with a particle filling port on the box body, and the damping particles in the box body can be replaced by using the filling port.

[0034] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vibration-damping fastener for use in a turnout area of ​​urban rail transit, arranged on a sleeper (8) in the turnout area, characterized in that: The invention comprises an iron pad (1) arranged above two adjacent sleepers (8) at the front and rear ends, the iron pad (1) being provided with a plurality of first anchor bolt mounting holes (101), the first anchor bolt mounting holes (101) being provided with corresponding anchor bolts for fixing the vibration-damping fasteners on the sleepers (8), a slide plate (2) being fixedly arranged on the inner side above the iron pad (1), a pointed rail (4) being slidably arranged on the slide plate (2), a spring bar mounting seat (6) being fixedly arranged on the outer side above the iron pad (1), the spring bar mounting seat (6) being connected to the slide plate (2) A basic rail (3) is provided between the two rails; a buckling component for limiting the outer position of the basic rail (3) is provided in the spring bar mounting seat (6); the inner side of the rail bottom of the basic rail (3) abuts against the slide bed plate (2), and the outer side is fixed by the buckling component; a particle damping vibration reduction box (5) is provided on the outer wall of the basic rail (3); the particle damping vibration reduction box (5) is closely fitted with the outer jaw, rail waist and rail bottom area of ​​the basic rail (3) on the side close to the basic rail (3); the particle damping vibration reduction box (5) is filled with particles for consuming collision energy, so as to form a particle damping vibration reduction structure.

2. The vibration-damping fastener for use in the turnout area of ​​urban rail transit according to claim 1, characterized in that: A vibration damping box fixing assembly (51) is provided on the outer side wall of the particle damping vibration damping box (5), and the vibration damping box fixing assembly (51) is used to fix the particle damping vibration damping box (5) to the outer side area of ​​the base rail (3) between two adjacent front and rear sleepers (8). The vibration damping box fixing assembly (51) comprises a support arm (511) provided on the outer side wall of the particle damping vibration damping box (5) and a fixing plate (512) provided at the bottom of the support arm (511). The fixing plate (512) and the iron pad (1) are both provided with second anchor bolt mounting holes (102), and corresponding anchor bolts are provided in the second anchor bolt mounting holes (102) for fixing and connecting the vibration damping box fixing assembly (51) and the iron pad (1).

3. The vibration-damping fastener for use in a turnout area of ​​urban rail transit according to claim 1, characterized in that: The retaining component comprises an E-shaped spring bar (61) and a limiting block (62), and the E-shaped spring bar (61) and the limiting block (62) are arranged in a matching manner and are used to limit the position of the outer side of the base rail (3).

4. The vibration-damping fastener for use in a turnout area of ​​urban rail transit according to claim 1, characterized in that: An under-plate pad layer (11) is provided between the iron pad (1) and the sleeper (8) to prevent the two from having hard contact, and the under-plate pad layer (11) is provided with a plurality of third anchor bolt mounting holes corresponding to the first anchor bolt mounting holes (101) for fixing the under-plate pad layer (11) to the sleeper (8).

5. The vibration-damping fastener for use in a turnout area of ​​urban rail transit according to claim 4, characterized in that: The bottom plate layer (11) is a polymer material isolation layer with a thickness of 1-2 mm.

6. The vibration-damping fastener for use in a turnout area of ​​urban rail transit according to claim 1, characterized in that: A rail underlay plate layer (31) is provided between the base rail (3) and the iron pad (1) to prevent hard contact between the two.

7. The vibration-damping fastener for use in a turnout area of ​​urban rail transit according to claim 6, characterized in that: The rail underlay layer (31) is a polymer material isolation layer with a thickness of 8-10 mm.

8. The vibration-damping fastener for use in a turnout area of ​​urban rail transit according to claim 1, characterized in that: A cushion layer (7) is provided at the contact position between the particle damping vibration reduction box (5) and the base rail (3).

9. The vibration-damping fastener for use in a turnout area of ​​urban rail transit according to claim 1, characterized in that: The particles used for collision energy dissipation are particles made of metal, ceramic or glass, and the particle diameter is 1mm-4mm.

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