A polyurethane wrapped integral vibration-damping sleeper

Abstract

The present invention discloses a polyurethane wrapped integral vibration-damping sleeper, comprising a sleeper body, steps on both sides of the upper end of the sleeper body, the vibration-damping sleeper also comprising an elastic buckling plate, a sealing layer, a polyurethane isolation layer, a filling protective layer and a polyurethane elastic layer, one end of the elastic buckling plate is arranged on the step, the sealing layer, the polyurethane isolation layer and the filling protective layer are sequentially coated on both sides of the sleeper body from top to bottom, the polyurethane elastic layer is embedded in the bottom of the sleeper body, and the polyurethane isolation layer, the filling protective layer and the polyurethane elastic layer are all preformed integral structures with the sleeper body. The vibration-damping sleeper can prevent the sleeper from being suspended in the air and the cement slurry of the roadbed caused by construction and vehicle operation. It has greater lateral and vertical restraints and a stronger ability to maintain the track gauge, further enhancing the vibration reduction effect.

Description

Technical Field

[0001] The invention belongs to the technical field of rail transit vibration reduction systems, and in particular relates to a polyurethane-wrapped integral vibration-reducing rail sleeper. Background Art

[0002] With the rapid development of my country's subway and intercity railway industries, people's requirements for sleeper vibration reduction are also increasing. Sleeper vibration reduction, as a form of vibration reduction between the overall roadbed vibration reduction and fastener vibration reduction, has been favored by many industry insiders in the early stage of entering the market due to its excellent cost-effectiveness and vibration reduction performance.

[0003] The existing vibration reduction structure of the sleeper generally includes rubber boots located at the bottom and around the vibration reduction sleeper, and a vibration reduction pad located between the bottom of the sleeper body and the rubber boots; the rubber boots are dense rubber and are designed with a groove structure for adjusting the stiffness; the rubber boots and the sleeper body are connected by cold bonding and bundling; the vibration reduction pad is a rubber foam structure and is directly placed at the bottom of the rubber boots. The existing rubber boot-type vibration reduction sleeper uses the foam rubber at the bottom to achieve vibration reduction, and uses the rubber boots to achieve isolation from the roadbed, ensuring that the vibration reduction sleeper has enough free space, which can effectively reduce the impact of wheel-rail vibration on the environment.

[0004] However, the defects of existing sleeper vibration reduction mainly include the following aspects:

[0005] 1. In the existing sleeper vibration reduction, the rubber boots and the sleeper body are connected by cold bonding and bundling. This connection method is easily affected by the construction quality and the subsequent vehicle operation. The rubber boots and the sleepers are prone to separation, causing the sleepers to hang empty, the track gauge changes greatly, the vibration reduction effect fails and the driving safety is affected.

[0006] 2. There is no sealing structure between the existing vibration-damping sleepers and the roadbed. Fluid pollutants such as water and oil can easily enter the interior of the vibration-damping sleepers directly. The vibration-damping effect of the rubber pads becomes ineffective after being soaked in water or oil.

[0007] 3. The existing vibration-damping sleepers only rely on the friction between the rubber boots and the ballast bed to provide restraint in the vertical direction. The restraint strength is insufficient. The vibration-damping sleepers are easily pulled out by the rails during vehicle operation, and a gap appears between the bottom of the vibration-damping sleepers and the ballast bed, causing empty suspension and cement slurry on the ballast bed. The vibration-damping effect fails and affects driving safety.

[0008] 4. The existing vibration-damping sleepers use foam rubber pads as the main vibration-damping components, which age quickly and have a short service life when soaked in water or oil. Summary of the invention

[0009] The present invention solves the deficiencies of the prior art and provides a polyurethane-wrapped integral vibration-damping sleeper, which has better sealing and waterproof properties, greater lateral and vertical restraint forces, and better vibration-damping effects.

[0010] The technical solution adopted by the present invention is: a polyurethane wrapped integral vibration-damping sleeper, comprising a sleeper body, wherein the sleeper body has steps on both sides of the upper end, the vibration-damping sleeper also includes an elastic buckling plate, a sealing layer, a polyurethane isolation layer, a filling protective layer and a polyurethane elastic layer, one end of the elastic buckling plate is arranged on the step, the sealing layer, the polyurethane isolation layer and the filling protective layer are sequentially coated on both sides of the sleeper body from top to bottom, the polyurethane elastic layer is embedded in the bottom of the sleeper body, and the polyurethane isolation layer, the filling protective layer and the polyurethane elastic layer are all preformed integral structures with the sleeper body.

[0011] Preferably, the elastic buckling plate includes a metal branch, an insulating layer and an elastic layer, the insulating layer is coated on both sides and the top of the metal branch, and the elastic layer is coated on the bottom of the metal branch.

[0012] Preferably, installation and fixing holes are provided at both ends of the metal branches.

[0013] Preferably, the polyurethane isolation layer is cast by a mold and bonded to the sleeper body as a whole, and an anti-eaves type self-waterproofing structure is arranged on the outer side thereof, and the anti-eaves type self-waterproofing structure forms a closed ring around the sleeper body.

[0014] Preferably, a plurality of protrusions are arranged at intervals on one end surface of the polyurethane elastic layer, and a mesh pattern is arranged on the end surface of the polyurethane elastic layer where the protrusions are arranged, and the polyurethane elastic layer is embedded in the bottom of the sleeper body through the protrusions.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. It mainly adopts polyurethane isolation layer and polyurethane elastic layer, and the polyurethane isolation layer, polyurethane elastic layer and sleeper body adopt preformed one-piece structure. The vibration-damping sleeper has greater lateral and vertical restraint force and stronger ability to maintain track gauge.

[0017] 2. The polyurethane isolation layer and the sleeper body are cast in a mold and bonded to the sleeper body. The polyurethane elastic layer is inlaid in the sleeper body with protrusions and mesh patterns, which changes the traditional connection method. That is, the polyurethane isolation layer, the polyurethane elastic layer and the sleeper body have stronger bonding, firm bonding and stable quality, while ensuring the lateral and vertical restraints of the vibration-damping sleeper.

[0018] 3. The structure has added a sealing layer and an anti-eaves self-waterproof structure. The polyurethane isolation layer and the polyurethane elastic layer are made of polyether polyurethane with better water resistance. The vibration-damping sleeper has better waterproof and water resistance. The polyurethane isolation layer and the polyurethane elastic layer are preferably made of polyether polyurethane, which is water-resistant, aging-resistant, wear-resistant, and has excellent vibration reduction and isolation properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of embodiments 1 and 5 of the present invention;

[0021] Figure 3 It is a schematic cross-sectional view of the side structure of the elastic buckling plate of the present invention;

[0022] Figure 4 It is a schematic cross-sectional view of the top view of the elastic buckling plate of the present invention;

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the polyurethane isolation layer of the present invention;

[0024] Figure 6 is a schematic cross-sectional view of the side structure of the polyurethane elastic layer of the present invention;

[0025] Figure 7 It is a schematic diagram of a top view of the cross-sectional structure of the polyurethane elastic layer of the present invention. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] A polyurethane wrapped integral vibration-damping sleeper, see Figure 1 , including a sleeper body 1, with steps on both sides of the upper end of the sleeper body 1, the vibration-damping sleeper also includes an elastic buckling plate 2, a sealing layer 3, a polyurethane isolation layer 4, a filling protective layer 5 and a polyurethane elastic layer 6, the elastic buckling plate 2 is arranged on the step, the sealing layer 3, the polyurethane isolation layer 4 and the filling protective layer 5 are sequentially covered on both sides of the sleeper body 1 from top to bottom, and the polyurethane elastic layer 6 is embedded in the bottom of the sleeper body 1.

[0028] Example 1

[0029] The polyurethane-wrapped integral vibration-damping sleeper is installed directly under the rail and inside the concrete of the ballast bed; this is achieved by the following methods, see Figure 2The ballast bed 7 has a U-shaped cavity inside, one end of the elastic buckle plate 2 is fixed on the ballast bed 7, and the elastic buckle plate 2 and the sealing layer 3, the polyurethane isolation layer 4, the filling protective layer 5 and the polyurethane elastic layer 6 form a concave cavity inside the ballast bed 7 for installing the sleeper body 1. In this embodiment 1, the sleeper body 1 is preferably convex, and the convex sleeper body 1 is installed in the concave cavity formed by the elastic buckle plate 2 and the sealing layer 3, the polyurethane isolation layer 4, the filling protective layer 5 and the polyurethane elastic layer 6. One end of the elastic buckle plate 2 is fixed on the ballast bed 7, and the other end is pressed on one end of the sleeper body 1. In this embodiment 1, preferably, the polyurethane isolation layer 4, the filling protective layer 5 and the polyurethane elastic layer 6 are all pre-formed as an integrated structure with the elastic buckle plate 2 when leaving the factory. In this embodiment 1, the sealing layer 1 uses elastic glue that is water-resistant, fatigue-resistant, and firmly bonded to concrete, and preferably uses modified petroleum asphalt materials, which have strong bonding force, excellent aging resistance, high elasticity, and self-healing ability, can self-repair punctured holes, and have excellent bonding and waterproofing quality. The sealing layer 3 seals the gap between the sleeper body 1 and the ballast 7 to prevent liquid pollutants such as water and oil from entering the interior of the polyurethane-wrapped integral vibration-damping sleeper, while ensuring that the polyurethane elastic layer 6 is dry and clean.

[0030] Example 2

[0031] See also Figure 3 as well as Figure 4 The elastic buckling plate 2 includes a metal branch 21, an insulating layer 22 and an elastic layer 23. The insulating layer 22 is coated on both sides and the top of the metal branch 21, and the elastic layer 23 is coated on the bottom of the metal branch 21. The metal branch 21 is provided with mounting holes 212 at both ends. The mounting holes are preferably bar-shaped holes, and the number is preferably 2. In this embodiment 2, the elastic buckling plate 2 provides a vertical downward restraining force to maintain the stability of the overall system of the vibration-damping sleeper; the elastic layer 23 is used to buffer the impact of the sleeper body 1 on the elastic buckling plate 2, and the insulating layer 22 wrapped around the metal branch 21 and the top is used for insulation and corrosion protection.

[0032] Example 3

[0033] See also Figure 5 as well as Figure 2The polyurethane isolation layer 4 is made of polyether polyurethane, which is water-resistant, aging-resistant, wear-resistant, and has excellent vibration reduction and isolation performance. The polyurethane isolation layer 4 is cast in a mold and bonded to the sleeper body 1, which enhances the bonding force between the polyurethane isolation layer 4 and the sleeper body 1, and the bonding is firm and the quality is stable, while ensuring the lateral restraint force of the vibration-damping sleeper. The problem that the rubber boots and the sleeper body in the existing sleeper vibration reduction are connected by cold bonding and bundling is solved, which is easily affected by the construction quality and the later vehicle operation, and the rubber boots and the sleepers are easily separated, resulting in empty sleepers, large track gauge changes, and the vibration reduction effect is invalid and affects driving safety. An anti-eaves self-waterproof structure 41 is arranged on the outside of the polyurethane isolation layer 4. The anti-eaves self-waterproof structure 41 forms a closed ring around the sleeper body, which can prevent liquid pollutants such as water and oil from contacting the polyurethane elastic layer 6 when the sealing layer 3 fails; and the anti-eaves self-waterproof structure 41 is penetrated into the roadbed 7 and connected to the connecting roadbed 7, which further increases the stability of the vibration-damping sleeper.

[0034] Example 4

[0035] See also Figure 2 The filling protective layer 5 is preferably made of a rubber ring, which is mainly used to protect the polyurethane isolation layer 4 from directly contacting the concrete of the roadbed 7 when moving downward.

[0036] Example 5

[0037] See also Figure 6 , Figure 7 as well as Figure 2 The polyurethane elastic layer 6 is preferably made of polyether polyurethane, which is water-resistant, aging-resistant, wear-resistant, and has excellent vibration reduction and isolation properties, ensuring the vertical restraint force of the vibration-damping sleeper. A plurality of protrusions 61 are arranged at intervals on one end surface, and the protrusions 61 are preferably arranged around the edge of one end surface of the polyurethane elastic layer 6 and on the central axis, and a mesh 62 is arranged on the end surface of the polyurethane elastic layer 6 where the protrusions 61 are arranged, and the polyurethane elastic layer 6 is embedded in the bottom of the sleeper body 1 through its protrusions 61. In this embodiment 4, the polyurethane elastic layer 6 is embedded in the sleeper body 1 through its protrusions 61, and the arrangement of the protrusions 61 and the mesh 62 further enhances the bonding force between the polyurethane elastic layer 6 and the sleeper body 1.

[0038] In combination with Embodiment 1, Embodiment 2, Embodiment 3, Embodiment 4 and Embodiment 5, the vibration-damping sleeper has the following advantages:

[0039] 1. The vibration-damping sleeper can prevent the sleeper from hanging empty and the roadbed cement from slurrying due to construction and vehicle operation.

[0040] 2. Compared with the existing sleeper vibration reduction structure, the vibration reduction sleeper has greater lateral and vertical restraint force and stronger ability to maintain track gauge.

[0041] 3. Compared with the existing sleeper vibration reduction structure, a sealing layer and an anti-eaves self-waterproof structure are added to the structure. The polyurethane isolation layer and the polyurethane elastic layer are made of polyether polyurethane with better water resistance. The vibration reduction sleeper has better waterproof and water resistance.

[0042] 4. Compared with the existing sleeper vibration reduction structure, the polyurethane elastic layer used as the vertical restraining force uses polyurethane with superior vibration reduction performance, and its vibration reduction performance is better.

[0043] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A polyurethane-wrapped integral vibration-damping sleeper, comprising a sleeper body (1), wherein both sides of the upper end of the sleeper body (1) have steps, characterized in that: The vibration-damping rail sleeper further comprises an elastic buckling plate (2), a sealing layer (3), a polyurethane isolation layer (4), a filling protective layer (5) and a polyurethane elastic layer (6); one end of the elastic buckling plate (2) is arranged on a step; the sealing layer (3), the polyurethane isolation layer (4) and the filling protective layer (5) are sequentially coated on both sides of the rail sleeper body (1) from top to bottom; the polyurethane elastic layer (6) is embedded in the bottom of the rail sleeper body (1); the polyurethane isolation layer (4), the filling protective layer (5) and the polyurethane elastic layer (6) are all preformed integral structures with the rail sleeper body (1); The elastic buckling plate (2) comprises a metal branch (21), an insulating layer (22) and an elastic layer (23), wherein the insulating layer (22) is coated on both sides and the top of the metal branch (21), and the elastic layer (23) is coated on the bottom of the metal branch (21); The polyurethane isolation layer (4) is cast by a mold and bonded to the sleeper body (1) as a whole, and an anti-eaves type self-waterproofing structure (41) is arranged on the outer side thereof, and the anti-eaves type self-waterproofing structure (41) forms a closed ring around the sleeper body; A plurality of protrusions (61) are arranged at intervals on one end surface of the polyurethane elastic layer (6), and a mesh pattern (62) is arranged on the end surface of the polyurethane elastic layer (6) where the protrusions (61) are arranged, and the polyurethane elastic layer (6) is embedded in the bottom of the sleeper body (1) through its protrusions (61); One end of the elastic buckling plate (2) is fixed on the ballast bed (7), and the other end is pressed on one end of the sleeper body (1).

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