Langfang Chenxing Machinery Co.,ltd.
We are a specialized, innovative, and high-tech enterprise focused on the R&D, production, and sales of shield tunneling machine cutterhead sealing brushes.
Since 2002, we have been deeply committed to the field of core components for construction machinery. Our flagship product—the tail seal brush for tunnel boring machines—is the “safety guardian” that ensures smooth tunneling operations even under complex geological conditions. We fully understand the uniqueness of each project, which is why we offer high-quality, customized services. Based on your specific tunnel boring machine model, geological conditions, and particular requirements, we can provide tailored seal brush solutions that excel in wear resistance, compression resistance, and sealing reliability.
Our products have been widely used in urban subways, railway and highway tunnels, cross-sea and cross-river tunnels, municipal utility tunnels, hydraulic engineering projects, and other fields. Our customers span major cities across China and we also export our products to global markets including the Americas, Europe, Southeast Asia, and the Middle East. We have established strong partnerships with numerous large-scale construction groups and tunnel-boring machine manufacturers.
We look forward to collaborating with you to jointly build a solid foundation for tunnel and underground space development projects.
Company established
Cumulative experiment
Cumulative number of served customers
Cumulative production of shield tail brushes
Core advantages
The accumulation of time: 20 years, dedicated to solving just one thing.
Since our founding, we have devoted all our energy to the core field of shield tail sealing brushes. After two decades of continuous dedication, we’ve witnessed tunneling projects go through every stage—from their initial beginnings to rapid growth. This journey has enabled us not only to fully understand our products but also to gain a profound insight into the myriad engineering challenges they face.
Professional depth: From knowing what is to understanding why it is.
We have established a complete technological closed-loop—from materials science (selection and treatment of specialized steel wires) to structural mechanics (brush seal arrangement) and finally to application processes (adaptation to various construction methods). This means that what we offer is not off-the-shelf components, but rather thoroughly thought-out and validated solutions for shield tail sealing systems.
The depth of experience: countless rehearsals for extreme operating conditions
For two decades, our products have accompanied customers through countless challenges—such as high-pressure, water-rich strata, highly abrasive sand and gravel formations, and corrosive submarine tunnels. This has given us a unique capability: even before a project begins, we can anticipate potential risks and proactively tailor solutions for you. Chances are that the engineering challenges you’re facing have already been solved on another project somewhere else.
Extending the service: Making reliable products even more dependable.
We deeply understand that even the best products require proper usage. Therefore, we view our services as a natural extension of our products. From initial collaborative diagnostics and mid-term on-site support all the way to tunneling data analysis and recommendations, we aim to become your reliable “shield tail sealing technology consultant” throughout your project.
Work Philosophy
We place greater trust in data and collaboration.
We reject vague, experience-based conjecture. Drawing on working condition data analysis and joint design workshops, we align solutions with your requirements from the very beginning.
We place greater emphasis on end-to-end controllability.
From raw material traceability to pre-shipment pressure simulation testing, establish traceable quality control points.
We place greater emphasis on long-term value.
We avoid overpromising the service life of any single product. Instead, we provide data-backed wear monitoring recommendations to help you plan optimal maintenance cycles and reduce total cost of ownership.
We firmly believe: Focus is the best promise! Time is the toughest measure!
Cultural Philosophy
Corporate Mission
Provide competitive products and services, and continuously create maximum value for our customers.
Values
Integrity, respect, and passion
Quality, Innovation, Technology
Development History
2023-10-01
Recognized as a “Specialized, Fine, and New” SME and re-certified as a national-level high-tech enterprise, with a total of 21 patents accumulated.
2022-10-04
In the China-Russia Yangtze River TBM crossing, our tail seal brushes completed a 10.2km sub-river tunnel in one pass with no water/slurry leakage.
2019-10-10
Certified as a national-level high-tech enterprise. Specializing in the R&D and manufacturing of large-diameter tunnel boring machine cutterhead sealing systems.
2018-10-17
Become a member unit of the Tunneling Machinery Branch of the China Construction Machinery Industry Association and participate in the formulation of the “Industry Standard for Shield Tail Sealing Brushes.”
2017-09-14
Chenxing trademark registered; same year, shield tail brushes won "High-Quality Domestic Supporting Component" award from China Construction Machinery Association.
Certification
High-tech enterprise
Hebei Province’s Innovative Small and Medium-sized Enterprises
Hebei Province Specialized, Fine, and New Small and Medium-sized Enterprises
Occupational Health Management System Certification
Environmental Management System Certification
Quality Management System Certification Certificate
A shield tail brush and its production system
Shield tail sealing system for tunnel boring machine (TBM) excavation in full-face hard rock strata, as well as its installation and construction methods.
A feeding device for a wire drawing machine
A cutting and brushing machine
Partner
