Recently, the first complete set of large-scale railway maintenance construction vehicle groups exported from China to Thailand successfully completed the offline acceptance in Kunming. Simultaneously, the 9 customized contact wire maintenance operation vehicles customized for Uzbekistan also passed the acceptance. This marks the continuous improvement of the competitiveness of China's railway infrastructure equipment in the international market. Behind this international cooperation boom, the fastening products, as the core connecting components of infrastructure construction, are playing a crucial supporting role. Hebei Duojia Metal Products Co., Ltd., as an international foreign trade enterprise specializing in hardware products, has independently developed the vertical impact expansion series of fasteners. These fasteners, with their high adaptability, are helping to improve the quality and efficiency of global railway and infrastructure projects.
The vertical impact expansion fasteners are a type of efficient fastening products that achieve precise installation through impact. They consist of an expansion tube, a screw, a nut, and a flat washer. Unlike traditional expansion bolts, they adopt a special hollow expansion structure design. Under the action of impact force, they can quickly form a tight bond with the substrate, achieving the "installation and tightening at the same time" efficient characteristic. The core function of this product lies in using the dual principles of mechanical locking and friction locking to firmly connect components with concrete, steel structures, etc., and can effectively resist external forces such as vibration and temperature difference deformation, ensuring the long-term stability of the connection part. It is particularly suitable for scenarios with strict installation accuracy and tightening strength requirements.
In terms of application scenarios, the adaptability range of vertical impact expansion fasteners covers various international infrastructure projects in multiple fields: in the railway sector, they can be used for railway track fixation components installation, contact wire support anchor fixation, and
maintenance machinery component tightening, perfectly matching the line correction equipment of the Thai railway construction vehicle group and the operation platform fixation requirements of the Uzbekistan contact wire maintenance vehicle; in construction projects, they are suitable for curtain wall installation, fire protection facility fixation, and guardrail construction; in industrial equipment fields, they can meet the requirements of mechanical equipment base reinforcement and production line component connection, and are also suitable for different regional working conditions such as the humid and hot environment in Southeast Asia and the wide-gauge infrastructure in Central Asia. Its outstanding advantages lie in the fact that installation does not require complex tools, significantly improving construction efficiency, and its core indicators such as corrosion resistance and uplift resistance all meet international standards, making it the preferred connection component for international infrastructure projects.
As a long-time player in the international foreign trade of fastening products, Hebei Duojia Metal Products Co., Ltd. has always focused on the international adaptation research and development of fastening products. Its vertical impact expansion series products have passed multiple international certifications and have successfully served key projects in Southeast Asia, Central Asia, and other regions such as railways and construction projects. This China railway equipment export boom further highlights the important value of high-quality fasteners in international infrastructure cooperation. Hebei Duojia will continue to provide customized research and development and strict quality control to meet the needs of global customers for professional fastening solutions.
Post time: Dec-02-2025