Integral vibration reduction sleeper wrapped by polyurethane

Abstract

The invention discloses an integral vibration reduction sleeper wrapped by polyurethane. The sleeper comprises a sleeper body, steps are arranged on two sides of the upper end of the sleeper body; thevibration reduction sleeper further comprises an elastic buckling and pressing plate, a sealing layer, a polyurethane isolation layer, a filling protection layer and a polyurethane elastic layer. Oneend of the elastic buckling and pressing plate is arranged on the step, the sealing layer, the polyurethane isolation layer and the filling protection layer sequentially wrap the two 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 protection layer, the polyurethane elasticlayer and the sleeper body are of a preformed integrated structure. According to the vibration reduction sleeper, the phenomena of sleeper empty hanging, ballast bed cement slurry turning and the like caused by construction and vehicle operation can be prevented. The transverse and vertical restraining force is larger, the track gauge keeping capacity is higher, and the vibration reduction effectis further enhanced.

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 type vibration reduction sleeper. Background technique [0002] With the rapid development of my country's subway and intercity railways, people's requirements for sleeper vibration reduction are also increasing; sleeper vibration reduction, as a form of vibration reduction between the overall ballast bed vibration reduction and fastener vibration reduction, relies on Because of its excellent cost performance and vibration damping performance, it was favored by many people in the industry when it entered the market. [0003] The existing sleeper vibration damping structure generally includes rubber boots located at the bottom and surroundings of the damping sleeper, and a vibration damping pad located between the bottom of the sleeper body and the rubber boots; the rubber boots are compact rubber, designe...

AI Technical Summary

Problems solved by technology

[0005] 1. In the existing sleeper vibration reduction, the rubber boots and the sleeper body are connected by cold bonding and binding. This connection method is easily affected by the construction quality and the later vehicle operation, and the rubber boots and the sleeper are prone to detachment , causing the sleeper to hang empty, the gauge changes greatly, leading to the failure of the vibration reduction effect and affecting the driving safety

[0006] 2. There is no sealing structure between the existing vibration-damping sleeper and the ballast bed. Fluid pollutants such as water and oil can easily enter the interior of the vibration-damping sleeper. The rubber backing plate soaked in water or oil will lose its vibration-damping effect

[0007] 3. The existing anti-vibration sleepers only rely on the friction force between the rubber boots and the ballast bed to provide restraint in the vertical direction. There are gaps between them, resulting in empty cranes, cement muddying of the ballast bed, failure of the vibration reduction effect and affecting driving safety

[0008] 4. The existing vibration-damping sleeper adopts foamed rubber backing plate as the main vibration-damping part, which has a fast aging speed and short service life in the case of soaking in water or oil

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