A nonlinear connection system of floating slab trackbed with multiple defense lines

Abstract

The present invention discloses a nonlinear connection system of a floating slab roadbed with multiple lines of defense, comprising a front floating slab roadbed, a rear floating slab roadbed and a connecting assembly, wherein a gap is formed between the front floating slab roadbed and the rear floating slab roadbed, the connecting assembly is installed in the gap, the connecting assembly is used to connect the front floating slab roadbed and the rear floating slab roadbed, the connecting assembly comprises a vibration isolation mechanism and a connecting mechanism, the vibration isolation mechanism is connected to the connecting mechanism, the vibration isolation mechanism is connected to the front floating slab roadbed and the rear floating slab roadbed through the connecting mechanism, the vibration isolation mechanism is used to reduce the vibration of the front floating slab roadbed and the rear floating slab roadbed, and under the joint action of the vibration isolation mechanism and the connecting mechanism, the ability of the floating slab roadbed to isolate vibration and dissipate kinetic energy is improved, and at the same time, the connection strength can be increased according to the change of the excitation load, thereby improving the integrity of the floating slab roadbed.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering vibration isolation, and in particular to a floating slab track bed nonlinear connection system with multiple defense lines. Background Art

[0002] Floating slab roadbeds are currently widely used to reduce the impact of vibration caused by rail transit operations due to their excellent vibration isolation capabilities. At the same time, to enhance integrity, shear hinges are usually installed between the front and rear floating slab roadbeds to reduce the problem of excessive vertical displacement of the track.

[0003] The prior art discloses an invention patent entitled "A shear hinge for a floating slab trackbed and its application method" (publication number: CN118241508A). This invention pre-buries grooves in the front and rear floating slab trackbeds, and places shear rods in the pre-buried sleeves as the main body of the shear hinge. The shear hinge enables the free installation of different numbers of shear rods by controlling the size of the pre-buried sleeves, making installation flexible and convenient.

[0004] The main function of the shear hinge of the floating slab track bed of the above invention is to transmit shear force and increase the parametric mass. It itself does not have the ability to reduce vibration and cannot help the floating slab track bed dissipate vibration. At the same time, the existing shear hinge has a simple structure and limited strength. It may still break when used for a long time or encountering extreme conditions, resulting in increased rail transit maintenance costs.

[0005] In summary, based on the shortcomings of the existing floating slab track bed shear hinges, a floating slab track bed connection system is needed that can effectively reduce vibration and flexibly increase the shear strength according to external excitation conditions. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a nonlinear connection system for a floating slab track bed with multiple lines of defense. Under the joint action of the vibration isolation mechanism and the connection mechanism, the ability of the floating slab track bed to isolate vibration and dissipate kinetic energy is improved. At the same time, the connection strength can be increased according to the change of the excitation load, thereby improving the integrity of the floating slab track bed.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A nonlinear connection system for a floating slab roadbed with multiple lines of defense includes a front floating slab roadbed and a rear floating slab roadbed, with a gap formed between the front floating slab roadbed and the rear floating slab roadbed; the system is characterized in that it also includes a connecting assembly, which is installed in the gap and is used to connect the front floating slab roadbed and the rear floating slab roadbed; the connecting assembly includes a vibration isolation mechanism and a connecting mechanism, the vibration isolation mechanism is connected to the connecting mechanism, and the vibration isolation mechanism is connected to the front floating slab roadbed and the rear floating slab roadbed via the connecting mechanism, and the vibration isolation mechanism is used to reduce vibration of the front floating slab roadbed and the rear floating slab roadbed.

[0009] Furthermore, the vibration isolation mechanism includes a connecting steel plate and a wire rope ring. The wire rope ring is formed by kneading a number of steel wires together. The connecting steel plate is rectangular and is provided with a connecting clamp. The wire rope ring passes through the connecting clamp.

[0010] Furthermore, the connecting mechanism includes an inner U-shaped steel, an intermediate U-shaped steel and an outer U-shaped steel, which are stacked in sequence, and the sizes of the inner U-shaped steel, the intermediate U-shaped steel and the outer U-shaped steel increase in sequence, the inner U-shaped steel is connected to the connecting steel plate, and the outer U-shaped steel is connected to the front floating slab roadbed and the rear floating slab roadbed.

[0011] Furthermore, it also includes a fixed steel plate, which is rectangular and fixed to the connecting mechanism. The fixed steel plate is used to fix the connecting assembly to the gap. The front floating plate roadbed and the rear floating plate roadbed are provided with grooves on the corresponding fixed steel plates, and the grooves match the fixed steel plates.

[0012] Furthermore, the connecting steel plate is provided with fixing hole one, the fixing steel plate is correspondingly provided with fixing hole two, the inner U-shaped steel is provided with long hole one, the middle U-shaped steel is provided with long hole two, and the outer U-shaped steel is provided with long hole three. The fixing bolts are passed through fixing hole one, long hole one, long hole two, long hole three and fixing hole two in sequence to fix the connecting assembly to the gap.

[0013] Furthermore, the lengths of the first elongated hole, the second elongated hole and the third elongated hole increase in sequence.

[0014] Furthermore, the first fixing hole and the second fixing hole are concentrically arranged.

[0015] Furthermore, when the front floating plate roadbed and the rear floating plate roadbed are subjected to vibration, the front floating plate roadbed and the rear floating plate roadbed undergo relative displacement, and the fixed steel plate drives the connecting steel plate to move relative to each other through the fixing bolts, causing the wire rope ring to undergo shear deformation to achieve vibration reduction. At this time, the fixing bolt moves within the length range of the long hole 1, and the inner U-shaped steel, the middle U-shaped steel and the outer U-shaped steel do not change.

[0016] Furthermore, when the vibration of the front floating slab track bed and the rear floating slab track bed exceeds the shear deformation of the wire rope ring, the fixed steel plate drives the inner U-shaped steel, the middle U-shaped steel and the outer U-shaped steel to move and shear deformation in turn through the fixing bolts, thereby increasing the shear resistance between the front floating slab track bed and the rear floating slab track bed.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention adopts a connecting assembly with shear deformation ability to connect the front floating plate roadbed and the rear floating plate roadbed. When the front floating plate roadbed and the rear floating plate roadbed are subjected to vibration and impact, the relative vertical displacement of the front floating plate roadbed and the rear floating plate roadbed drives the connecting assembly to shear deformation, and the shear deformation of the wire rope ring and the mutual friction of the wire ropes respectively play the role of isolating vibration and dissipating kinetic energy. At the same time, through the increase in the length of the long hole one, the long hole two and the long hole three, when the relative vertical displacement of the front floating plate roadbed and the rear floating plate roadbed exceeds a certain threshold, the fixing bolts press against the long holes in turn. The edges of hole one, long hole two and long hole three drive the inner U-shaped steel, middle U-shaped steel and outer U-shaped steel to move and shear deform in turn, increase the shear stiffness of the connection components, provide stronger shear resistance between the front floating slab roadbed and the rear floating slab roadbed, and further suppress the increase of the vertical displacement of the floating slab roadbed. At this time, the high energy dissipation capacity coupled with multiple energy dissipation mechanisms such as friction between the wire rope ring and the friction between the inner U-shaped steel, middle U-shaped steel and outer U-shaped steel and metal deformation can effectively reduce the adverse effects of kinetic energy and provide multiple lines of defense for the rail transit structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings:

[0020] Figure 1 This is a schematic structural diagram of a nonlinear connection system of a floating slab trackbed with multiple defense lines according to the present invention;

[0021] Figure 2 For the present invention Figure 1 A top view of

[0022] Figure 3 Schematic diagram of the structure of the connection assembly in the present invention;

[0023] Figure 4 Schematic diagram of the structure of the vibration isolation mechanism of the present invention;

[0024] Figure 5 Schematic diagram of the structure of the connecting mechanism in the present invention;

[0025] Figure 6 For the present invention Figure 5 Side view of;

[0026] Figure 7 Schematic diagram of the operation of the vibration isolation mechanism of the present invention;

[0027] Figure 8 This is a schematic diagram of the working of the vibration isolation mechanism and the connecting mechanism in the present invention.

[0028] In the figure: 1-front floating slab roadbed; 2-rear floating slab roadbed; 3-gap; 4-connecting assembly; 5-vibration isolation mechanism; 6-connecting mechanism; 7-connecting steel plate; 8-wire rope ring; 9-connecting clamp; 10-inner U-shaped steel; 11-middle U-shaped steel; 12-outer U-shaped steel; 13-fixing steel plate; 14-fixing hole one; 15-fixing hole two; 16-long hole one; 17-long hole two; 18-long hole three. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0030] like Figures 1 to 6 As shown, a nonlinear connection system of a floating slab roadbed with multiple lines of defense according to the present invention includes a front floating slab roadbed 1, a rear floating slab roadbed 2, a connection component 4 and a fixed steel plate 13. A gap 3 is formed between the front floating slab roadbed 1 and the rear floating slab roadbed 2. The front floating slab roadbed 1 and the rear floating slab roadbed 2 are provided with grooves on the fixed steel plates 13 corresponding to the fixed steel plates 13. The grooves match the fixed steel plates 13. The connection component 4 is installed in the gap 3 and fixed to the front floating slab roadbed 1 and the rear floating slab roadbed 2 through the fixed steel plates 13. The connection component 4 is used to connect the front floating slab roadbed 1 and the rear floating slab roadbed 2 and improve the vibration resistance and shear resistance of the front floating slab roadbed 1 and the rear floating slab roadbed 2.

[0031] The connecting assembly 4 includes a vibration isolation mechanism 5 and a connecting mechanism 6. The vibration isolation mechanism 5 is installed in the connecting mechanism 6 and connected to the connecting mechanism 6. The fixed steel plate 13 is installed on the outside of the connecting mechanism 6. The connecting mechanism 6 is connected to the front floating plate roadbed 1 and the rear floating plate roadbed 2 through the fixed steel plate 13. The vibration isolation mechanism 5 is used to reduce the vibration of the front floating plate roadbed 1 and the rear floating plate roadbed 2.

[0032] The vibration isolation mechanism 5 includes two connecting steel plates 7 and a wire rope ring 8. The connecting steel plates 7 are rectangular. The wire rope ring 8 is formed by kneading a number of steel wires together. A connecting clamp 9 is provided on the connecting steel plates 7. Both sides of the wire rope ring 8 pass through the connecting clamps 9 on the two connecting steel plates 7 to achieve a fixed connection with the connecting steel plates 7.

[0033] In the present invention, the connecting clamps 9 on the connecting steel plate 7 are correspondingly set, and there are multiple connecting clamps 9. The number of wire rope rings 8 is consistent with that of the connecting clamps 9. The specific setting can be based on actual use. In this embodiment, there are three connecting clamps 9 and three wire rope rings 8 respectively, which enhance the vibration reduction ability of the vibration isolation mechanism 5 and achieve better vibration reduction effect.

[0034] The connecting mechanism 6 includes an inner U-shaped steel 10, an intermediate U-shaped steel 11 and an outer U-shaped steel 12. The inner U-shaped steel 10, the intermediate U-shaped steel 11 and the outer U-shaped steel 12 are stacked from the inside to the outside, and the sizes of the inner U-shaped steel 10, the intermediate U-shaped steel 11 and the outer U-shaped steel 12 increase successively. The shape of the fixed steel plate 13 is rectangular. There are two fixed steel plates 13. The two fixed steel plates 13 are respectively fitted with the outer surfaces of both sides of the outer U-shaped steel 12. The outer U-shaped steel 12 is connected to the front floating plate roadbed 1 and the rear floating plate roadbed 2 through the fixed steel plates 13. The two connecting steel plates 7 are respectively fitted with the inner surfaces of both sides of the inner U-shaped steel 10, and are finally fixed to the front floating plate roadbed 1 and the rear floating plate roadbed 2 through fixing bolts that pass through the connecting steel plates 7, the inner U-shaped steel 10, the intermediate U-shaped steel 11, the outer U-shaped steel 12 and the fixed steel plates 13 in sequence.

[0035] Specifically, a fixing hole 14 is provided between each two adjacent connecting clamps 9 of the connecting steel plate 7, and a fixing hole 2 15 is provided on the fixing steel plate 13 corresponding to the fixing hole 14. The fixing hole 14 and the fixing hole 2 15 are concentrically arranged. The inner U-shaped steel 10 is provided with a long hole 16, the middle U-shaped steel 11 is provided with a long hole 2 17, and the outer U-shaped steel 12 is provided with a long hole 3 18. The fixing bolts are passed through the fixing hole 14, the long hole 16, the long hole 2 17, the long hole 3 18 and the fixing hole 2 15 in sequence to fix the connecting component 4 to the gap 3.

[0036] In the present invention, the lengths of the elongated hole 16, the elongated hole 2 17 and the elongated hole 3 18 increase sequentially, that is, the length of the elongated hole 2 17 is greater than the elongated hole 16, and the length of the elongated hole 3 18 is greater than the elongated hole 2 17. In this embodiment, there are two fixing holes 14 opened between each two adjacent connecting clamps 9, and the length of the elongated hole 16 is not less than the distance H between the two fixing holes 14, so that the fixing bolt can move along the direction of the elongated hole 16, the elongated hole 2 17 and the elongated hole 3 18.

[0037] like Figure 7 As shown, when the track is subjected to vibration and impact caused by the high-speed running of the subway, the front floating plate roadbed 1 and the rear floating plate roadbed 2 are subjected to relative displacement due to the vibration. The front floating plate roadbed 1 and the rear floating plate roadbed 2 drive the connecting steel plates 7 on both sides to move relative to each other through the corresponding fixed steel plates 13 and fixed bolts, causing the wire rope ring 8 to shear deform. The wire rope ring 8 isolates the vibration due to the time lag effect caused by its nonlinear mechanical behavior. At the same time, the friction energy caused by the friction between the steel wires inside it dissipates kinetic energy. At this time, the fixing bolt moves within the length range of the long hole 16, and the inner U-shaped steel 10, the middle U-shaped steel 11 and the outer U-shaped steel 12 do not change.

[0038] like Figure 8As shown, when the vibration of the front floating slab track bed 1 and the rear floating slab track bed 2 exceeds the shear deformation of the wire rope ring 8, the fixed steel plate 13 first drives the inner U-shaped steel 10 to shear deformation through the fixing bolts. As the vertical displacement amplitude continues to increase, the fixing bolts drive the middle U-shaped steel 11 and the outer U-shaped steel 12 to move in turn, thereby causing shear deformation. Among the inner U-shaped steel 10, the middle U-shaped steel 11 and the outer U-shaped steel 12, as the amount of shear deformation increases, the shear stiffness of the connection component 4 increases accordingly, which can provide stronger shear resistance between the front floating slab track bed 1 and the rear floating slab track bed 2. At the same time, the high energy dissipation capacity of the connection component 4 coupled with multiple energy dissipation mechanisms such as steel wire friction of the wire rope ring 8, metal deformation of the inner U-shaped steel 10, the middle U-shaped steel 11 and the outer U-shaped steel 12, and friction between them can effectively reduce the adverse effects of kinetic energy.

[0039] The implementation methods of the present invention are not limited to these. According to the above-mentioned embodiments of the present invention, by utilizing conventional technical knowledge and customary means in this field, without departing from the above-mentioned basic technical ideas of the present invention and without conflict, the above-mentioned preferred embodiments can also be modified, replaced or combined in various other forms. The other embodiments obtained all fall within the scope of protection of the present invention.

Claims

1. A floating slab track bed nonlinear connection system with multiple defense lines, comprising a front floating slab track bed and a rear floating slab track bed, wherein a gap is formed between the front floating slab track bed and the rear floating slab track bed; Its characteristics are: The vehicle further comprises a connecting assembly installed in the gap, the connecting assembly being used to connect the front floating plate track bed and the rear floating plate track bed, the connecting assembly comprising a vibration isolation mechanism and a connecting mechanism, the vibration isolation mechanism being connected to the connecting mechanism, the vibration isolation mechanism being connected to the front floating plate track bed and the rear floating plate track bed via the connecting mechanism, the vibration isolation mechanism being used to reduce vibration of the front floating plate track bed and the rear floating plate track bed; The vibration isolation mechanism includes a connecting steel plate and a steel wire rope ring, wherein the steel wire rope ring is formed by kneading a plurality of steel wires together. The connecting steel plate is rectangular and is provided with a connecting clamp, through which the steel wire rope ring passes. The connecting mechanism includes an inner U-shaped steel, an intermediate U-shaped steel, and an outer U-shaped steel. The inner U-shaped steel, the intermediate U-shaped steel, and the outer U-shaped steel are stacked in sequence, and the sizes of the inner U-shaped steel, the intermediate U-shaped steel, and the outer U-shaped steel are increased in sequence. The inner U-shaped steel is connected to the connecting steel plate, and the outer U-shaped steel is connected to the front floating slab roadbed and the rear floating slab roadbed. It also includes a fixing steel plate, which is rectangular and fixed to the connecting mechanism. The fixing steel plate is used to fix the connecting assembly to the gap. The front floating plate roadbed and the rear floating plate roadbed are provided with grooves corresponding to the fixing steel plates, and the grooves match the fixing steel plates. The connecting steel plate is provided with a fixing hole 1, and the fixing steel plate is provided with a fixing hole 2 corresponding to the fixing plate. The inner U-shaped steel is provided with a long hole 1, the middle U-shaped steel is provided with a long hole 2, and the outer U-shaped steel is provided with a long hole 3. The fixing bolts are passed through the fixing hole 1, the long hole 1, the long hole 2, the long hole 3 and the fixing hole 2 in sequence to fix the connecting assembly to the gap. The lengths of the long hole 1, the long hole 2 and the long hole 3 increase in sequence.

2. The nonlinear connection system of floating slab trackbed with multiple defense lines according to claim 1, characterized in that: The first fixing hole and the second fixing hole are concentrically arranged.

3. The floating slab trackbed nonlinear connection system with multiple defense lines according to claim 1, characterized in that: When the front floating plate track bed and the rear floating plate track bed are vibrated, the front floating plate track bed and the rear floating plate track bed undergo relative displacement, and the fixed steel plate drives the connecting steel plate to move relative to each other through the fixing bolts, so that the wire rope ring undergoes shear deformation to achieve vibration reduction. At this time, the fixing bolt moves within the length range of the long hole 1, and the inner U-shaped steel, the middle U-shaped steel and the outer U-shaped steel do not change.

4. The floating slab trackbed nonlinear connection system with multiple defense lines according to claim 3, characterized in that: When the vibration of the front floating plate track bed and the rear floating plate track bed exceeds the shear deformation of the wire rope ring, the fixed steel plate drives the inner U-shaped steel, the middle U-shaped steel and the outer U-shaped steel to move and shear deform in sequence through the fixing bolts, thereby increasing the shear resistance between the front floating plate track bed and the rear floating plate track bed.

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