What are the applications of MS series multi-directional displacement comb plate expansion device in
The MS series multi-directional displacement comb plate expansion device is a patented expansion device developed with reference to relevant industry standards. It has the core technical advantages of multi-directional displacement, high load-bearing capacity, smooth durability, fatigue resistance, and easy maintenance. It is designed to solve the structural displacement problems of complex workin
The MS series multi-directional displacement comb plate expansion device is a patented expansion device developed with reference to relevant industry standards. It has the core technical advantages of multi-directional displacement, high load-bearing capacity, smooth durability, fatigue resistance, and easy maintenance. It is designed to solve the structural displacement problems of complex working conditions such as elevated, large-span, curved, and heavy loads in urban rail transit, and is a key supporting component to ensure the safety of track bridges and the smooth operation of trains.
1、 Core application scenarios (full coverage of urban rail transit scenarios)
1. Expansion joints at the beam ends of elevated subway/light rail bridges (mainstream core application)
The joints at the ends of simply supported beams, continuous beams, and steel-concrete composite beams of elevated urban rail transit lines (subway, light rail, monorail) are the core application scenarios of the MS series devices.
Adapt to multidimensional displacements of elevated bridges caused by temperature changes, concrete shrinkage and creep, train dynamic loads, wind loads, such as longitudinal expansion and contraction, lateral displacement, vertical rotation angle, torsional deformation, etc.
Replacing traditional modular and plate type expansion devices, it solves the pain points of single displacement, easy jamming, bumpy driving, high noise, and short service life of traditional products, and meets the requirements of high-frequency heavy load, high-speed stability, low noise and comfortable operation of trains.
2. Special bridges for large-span rail transit (cross river/cross river/cross line bridges)
Suitable for subway/light rail cross river bridges, cross line hub bridges, and long continuous beam bridges (temperature span>120m).
To cope with the characteristics of large displacement, multi-directional composite deformation, and complex stress of large-span bridges, a single set of expansion and contraction can cover 80-1000mm, and a combination can reach 2000mm+, meeting the demand for extremely large displacement.
Resist repeated train impacts, temperature fluctuations, and corrosive environments, ensuring long-term stability, minimal maintenance, and high safety of cross river/elevated hubs.
3. Curved beams, sloping bridges, skew bridges, and irregular bridge sections
Urban rail transit often includes small radius curves, large longitudinal slopes, diagonal beams, and irregular ramps, with structural displacements exhibiting multidimensional compound, asymmetric, and torsional deformation characteristics.
The MS device achieves six degrees of freedom displacement (longitudinal/transverse/vertical/horizontal angle/vertical angle/torsional displacement) through spherical pairs, multi-directional displacement boxes, U-shaped bolt groups, and spherical supports, adapting to complex displacements of curved/slope bridges/inclined bridges, and eliminating the risks of jamming, tooth breakage, and fracture.
4. Seamless track area (with rail expansion joint matching)
Used in conjunction with rail expansion adjusters on elevated seamless tracks, before and after turnouts, and at the ends of long rails.
Absorb the relative displacement between the beam and rail, block the internal force transmission of seamless steel rails caused by bridge expansion and contraction, reduce the additional stress on the steel rails, ensure smooth operation of long rails and impact free trains, and reduce wheel rail wear and maintenance costs.
5. Interchanges and station ancillary bridges at rail transit hubs
Suitable for entrance and exit lines of subway vehicle depots, station overpasses, passage bridges, and ramp bridges in throat areas.
Meet the working conditions of multi line intersection, dense traffic flow, and complex deformation in the hub area, ensure smooth driving, structural safety, and traffic efficiency, and adapt to the connection displacement between stations and sections.
6. Old Line Renovation and Disease Control (Maintenance and Reinforcement Project)
Used for the replacement, major repair, and disease control of existing rail transit elevated expansion devices (traditional device damage, jamming, jumping, water leakage, rust).
Shallow burial design, modular structure, and convenient installation greatly shorten the construction skylight time, reduce operational interference, and improve renovation efficiency and long-term durability.
2、 Exclusive technical value of rail transit
1. Multi directional displacement: adapted to complex track displacements
The spherical pair and displacement box structure achieve synchronous coordination of longitudinal expansion, lateral displacement, vertical rotation, horizontal deflection, and torsional deformation, meeting the multi-dimensional, micro, and high-frequency composite displacement of track bridges.
Solve the industry problem of traditional devices only being able to expand and contract in one direction, unable to adapt to corners/twists, and prone to jamming.
2. High load-bearing and fatigue resistance: suitable for high-frequency heavy loads on trains
Adopting high-strength alloy steel comb plates, integral rigid structure, and reliable anchoring system, it has high bending and compressive strength, can withstand train axle load, dynamic load impact, and long-term cyclic load, and has a fatigue life far exceeding ordinary products.
The tooth end chamfer and anti slip groove design disperse stress, reduce impact, and adapt to the harsh working conditions of 24-hour uninterrupted and high-density departure of rail transit.
3. Smooth driving: low noise and stable operation, comfortable for passengers
The comb teeth mesh precisely, the gap is uniform, and the transition is smooth. When the train passes through, there is no jumping, no impact, and low noise, significantly improving passenger comfort and reducing wheel rail noise pollution.
Built in polymer damping cushion layer, providing cushioning and vibration reduction, reducing resonance, and complying with environmental standards for vibration reduction and noise reduction in rail transit.
4. Durable and anti-corrosion: adaptable to complex environments
The main body is made of fine steel+multi element anti-corrosion coating (galvanized/plastic sprayed/stainless steel composite), which is waterproof, dust-proof, anti-corrosion and anti-aging, and suitable for urban humid, acid rain, salt fog and dust environment.
Double layer water stop and automatic slag cleaning structure, prevent foreign objects from entering, prevent water accumulation and corrosion, extend service life, and reduce maintenance frequency.
5. Convenient operation and maintenance: cost-effective throughout the entire lifecycle
Modular and easy to disassemble, partial damage can be replaced in a single set without the need for overall dismantling, and the maintenance time of the sunroof is short with minimal impact on operation.
Simple structure, no vulnerable rubber bands (compared to modular), minimal daily maintenance, long lifespan, and high overall cost-effectiveness.
3、 Application Summary
The MS series multi-directional displacement comb plate expansion device is widely used in urban rail transit, including elevated bridges, large-span bridges, curved/slope/inclined bridges, seamless lines, hub overpasses, and old line renovations. With its core performance of multi-directional displacement, high load-bearing capacity, smoothness, low noise, durability, and easy maintenance, it effectively solves the problem of complex displacement of track structures, ensures the safety and stability of trains, long-term stability of lines, and efficient and economical operation and maintenance. It is a high standard, long-life, and intelligent construction expansion device for modern urban rail transit.
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