Speed Locker Seismic Resistant Viscous Damper for Buidling & Bridge Construction

The speed locking device (Shock Transmission Unit or Lock-up Device) in the field of construction bridges is a product based on the viscous damper and improved according to different functions. The viscous damper piston can reciprocate in the cylinder. The piston is equipped with a damping hole. The cylinder is filled with fluid damping medium. When relative movement occurs between the piston and the cylinder, the pressure difference between the front and rear of the piston causes the medium to flow out of the damping hole. through, thereby generating damping force. The speed lock allows the structure to deform freely at its low speed; when the instantaneous speed rises to a certain speed, the damping force rises sharply, causing the structure to be "rigidly" connected, the damper is locked, the structural deformation speed is sharply reduced, and the structural deformation is as follows. speed after blocking. Under normal use conditions of buildings and bridges, the longitudinal displacement speed of bridges caused by temperature differences and creep is small (usually less than 1mm/s). At this time, the speed lock does not work and can provide the required displacement of buildings and bridges; when When the movement speed of buildings and bridges is greater than the design speed value of the speed locker (such as a strong earthquake), the LUD is immediately locked, and the original movable piers are instantly transformed into fixed piers, causing the structure to change from one fixed pier under normal conditions to more fixed piers. , effectively distribute the load of the superstructure to multiple piers, making the structure's stress more uniform, its performance more stable, and it can effectively reduce the project cost.

The structure of the speed locker is similar to that of the viscous damper. The main cylinder is filled with high-viscosity fluid medium. When the piston reciprocates in the cylinder, the piston causes the medium in the cylinder on one side of the movement direction to generate positive pressure and on the other side. Negative pressure is generated on the side of the cylinder, forcing the medium to flow from the positive pressure side to the negative pressure side through the pores on the piston or the gap between the piston and the cylinder wall. When the relative movement speed between the piston and the cylinder exceeds the limit value, the medium cannot pass smoothly. , the relative movement is prevented, that is, a locking effect is produced. According to customer needs, our company's lock products can use shear thickening materials or oil valve structures to achieve the above locking effect.
 

Speed lockers are widely used in various buildings, bridges, railway continuous beams, and simply supported beams abroad because of their excellent characteristics. Speed locks have been widely used in newly built buildings, bridges and railways in China in recent years. Its main application areas include: various buildings, viaducts, single-span bridges, connecting beam bridges, cable-stayed bridges, and seismic reconstruction of bridges.

Hebei Ansha New Material Technology Co., Ltd. is located in Binhu New District of Hengshui City. We specialize in R&D and production of seismic isolation and damping products for both buildings and bridges. Our products include rubber bearings, spherical bearings, friction pendulum systems, fluid viscous dampers, tuned mass dampers, buckling-restrained braces, friction dampers and metallic dampers. In addition, we manufacture bridge expansion joints and fiber-enhanced plastic products.
We have established state-of-the-art physical and chemical laboratories and specialized production lines. Our company operates in full compliance with the ISO9001:2015 Quality Management System, ISO14001:2015 Environmental Management System, and ISO45001:2018 Occupational Health and Safety Management System.
Guided by the anti-seismic design principle of "resisting collapse in a major earthquake, enabling repair in a moderate earthquake, and remaining undamaged in a minor earthquake", we offer our customers a comprehensive array of services. These services include technical consultation, structural analysis and calculation, design optimization, research and development, manufacturing, installation guidance, performance monitoring, maintenance and repair.
 

1. Advanced equipment. Our workshop has more than 100 pieces of the most advanced equipment to ensure timely delivery of large orders. In addition, standardized production can be guaranteed to comply with international standards.
2. Experienced and skilled technical and production teams have professional production skills and many years of experience. Our team of workers can improve production efficiency, shorten the production cycle, and thereby reduce costs.
3. Complete product models, we have a variety of bearings for construction, including basin bearings, elastic skateboard bearings, spherical bridge bearings, high damping spherical bearings, lead rubber bearings, etc.
4. Exquisite packaging and timely delivery. All products are inspected by quality inspection personnel before loading, and then the quality inspection data are archived and retained. Our company also produces isolation products and vibration control products.
5. The professional sales team has a comprehensive understanding of shock absorption and isolation products, good English speaking and writing skills, and excellent communication skills to provide the best solutions to your problems. You can ask them for recommendations, customized services, and any other product information you want to know about.
 

1. Are you a trading company or manufacturer?
    We are manufacturer and have our own factory
2. What certificate do you get?
    ISO9001:2015 quality management system certification, 
    ISO14001:2015 environmental management system certification, 
    ISO45001:2018 occupational health and safety management system certification
3. What is your MOQ?
    1 pieces
4. What is your delivery time for mass production?
     Customized product design time: Based on the performance parameters provided, the detailed design of the product will be           completed within 7 working days
     Peak season delivery time: 1.5~2 months after confirmation of product processing drawings
     Off-season delivery time: Within 25~35 working days after confirmation of product processing drawings
5. Can you do OEM?
      We can. OEM orders are welcome.
6. What is your policy sample?
    We provide free scale samples, and buyers bear the express delivery costs.
7. How long does it take to prepare samples?
     About 7-10 working days