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This patent features an innovative improvement to traditional anchor head structures through a specially designed chamfering technique. By effectively optimizing the deviation angle during post-tensioning, it significantly reduces the risk of strand breakage. This patented design not only enhances construction safety and structural durability but also ensures long-term stability of the post-tensioning system.
This patent introduces an innovative wedge-type coupler specifically designed for prestressed structures, integrating key components such as wedges, anchor head, strands, protective cover, and confinement ring. The coupler’s receiving face features a uniquely designed slightly convex inner layer combined with inclined or straight outer surfaces, incorporating multiple differential-diameter through-holes and inclined holes to flexibly accommodate two groups of strands. These are firmly secured by dedicated wedges, anti-slip washers, springs, and a ventilated, cap-shaped metal cover, ensuring exceptional structural strength and reliability.
This patented design effectively reduces volume and material consumption, shortens the required strand length, and lowers overall costs, significantly improving construction efficiency and economic value. Additionally, the protective cover and grout inspection holes enable real-time monitoring of grouting conditions and prevent leakage, enhancing durability and overall safety.
This breakthrough technology exemplifies our unwavering commitment to quality and engineering excellence, solidifying our leadership and continuous innovation in the field of prestressed systems.
This patent introduces a novel forming method and structure for strands and metal sleeves used in anti-bridge-collapse devices, addressing stringent safety requirements. By bundling multiple steel strands and applying an initial plastic coating on the outer layer, the assembly is inserted into a metal sleeve and subjected to external rolling compression, firmly securing the strands within. The front section of the metal sleeve is then rolled to form precise threads, creating a secondary gripping effect that significantly enhances structural stability and durability.
Further surface heat treatment is applied to increase hardness and minimize the risk of damage from external forces, ensuring superior anti-fall performance. This patented method not only reinforces gripping strength but also simplifies the manufacturing process and reduces both material and production costs, achieving both safety and economic benefits.
This technological advancement reflects our forward-thinking commitment to infrastructure safety and continuous innovation, safeguarding public safety and elevating engineering quality standards.
This patented machine is specially designed for tapping wedges used in post-tensioning systems, offering an innovative, fully automated solution. It integrates a precise positioning device and an automatic ejecting mechanism, enabling each workpiece to be sequentially fed via a guiding rail, securely positioned for tapping, and automatically ejected upon completion, seamlessly preparing for the next cycle without manual intervention.
By automating the feeding, positioning, and ejecting processes, this dedicated tapping machine significantly reduces processing time and labor costs while greatly improving tapping precision and overall product quality. The patented design overcomes the efficiency limitations of traditional manual operations, achieving high-speed, safe, and stable production. It clearly demonstrates our leadership and commitment to innovation in specialized equipment for post-tensioning wedges.
This patent introduces an advanced method specifically developed to enhance the structural strength of wedges used in post-tensioning systems. By utilizing steel rods as the base material and applying secondary spheroidizing and cold forging processes, the molecular structure of the steel is reorganized and refined, resulting in tighter and denser molecular arrangement, and significantly improved material integrity.
During cold forging, the central hole and tapered surface of the wedge are precisely formed, leading to a substantial increase in hardness. This patented method improves the maximum tensile stress resistance of the anchor head holes by more than 7.6%, while also simplifying the manufacturing process, saving material, and reducing overall costs.
This innovative approach reflects our unwavering commitment to structural safety, performance enhancement, and production efficiency, solidifying our position as a technological leader and continuous innovator in the field of post-tensioning systems.
This patent introduces an advanced method specifically designed to enhance the structural strength of anchor heads and wedge compression sleeves used in post-tensioning systems. By utilizing steel as the base material, the process employs secondary spheroidizing and forging techniques to reorganize and densify the steel molecules, resulting in significantly improved material integrity and strength.
During forging, precision shaping of holes, grooves, and tapers is completed, effectively increasing the hardness of the anchor head and enabling it to withstand up to 6.7% higher maximum tensile stress, greatly enhancing tensile performance.
After forging, the wedge compression sleeve undergoes another spheroidizing treatment to reduce its hardness, followed by high-frequency heat treatment on the inner surface, creating a harder inner wall and a relatively softer outer wall. This "hard inside, tough outside" structure improves gripping performance after compression, simplifies the manufacturing process, saves material, and reduces production costs, while simultaneously improving safety and economic benefits.
This patent reflects our relentless pursuit of engineering excellence and detail perfection, further solidifying our technological leadership and continuous innovation in the field of post-tensioning systems.
This patent introduces an innovative structural improvement for the stressing and fixed ends of post-tensioning systems. A fixed plate is added to the front end of the anchor frame, featuring a through-hole that penetrates the anchor body and a grout hole adjacent to the through-hole, creating a continuous, integrated channel that enhances grouting density and overall structural integrity.
An additional prestressing grout cap is installed on one side of the anchor frame. Around the outer edge of the through-hole on the fixed plate, a ring rib is precisely designed to match the grout cap’s inner diameter, ensuring tight sealing and air-tightness during assembly. Open slots are designed diagonally on both the fixed plate and grout cap, with stepped sections on the rear surface, providing three key functions:
1.Ensuring a sealed, pivotable connection between the anchor frame and the grout cap
2.Providing secure positioning for locking components
3.Enhancing stability with the fixed surface connection
This patented design not only significantly improves sealing performance, compressive strength, and durability but also simplifies installation, elevates construction quality, and ensures safety. It highlights our continuous technological leadership and commitment to innovation in post-tensioning systems.
This patent introduces a comprehensive structural improvement for anchor heads in post-tensioning systems. Multiple through conical holes are designed on the anchor head, with the inner wall surfaces subjected to specialized heat treatments (such as quenching).
This "hard surface, tough core" design standardizes material quality and significantly strengthens the wedge’s grip when inserted into the conical holes, evenly distributing gravitational and prestressing forces to prevent damage from hole expansion due to concentrated stresses.
This structural innovation greatly enhances the load-bearing capacity, gripping force, and tensile support of post-tensioning systems, achieving higher efficiency, greater structural strength, superior construction quality, and improved safety. It provides a solid and reliable foundation for major infrastructure projects.
This patent introduces an improved coupler structure specifically designed for post-tensioning systems, focusing on enhancing the overall structural integrity of the anchor head and cover plate while preventing oxidation of key internal components such as wedges, strands, and springs, which could compromise strength over time.
The anchor head is designed with a groove containing multiple conical holes for strand installation, allowing the wedges to firmly secure the strand ends. Additionally, a grouting hole is set within the groove to facilitate complete filling. Surrounding screw holes allow the anchor head to be tightly sealed with the cover plate, which also includes a corresponding through-hole. When grout is injected into the anchor head, it completely fills the groove and each conical hole, then flows through the cover plate’s hole into the connecting sleeve space, achieving a comprehensive encapsulation.
This innovative design effectively prevents oxidation of internal components, significantly enhancing durability, structural strength, and overall service life of post-tensioning systems, meeting the highest standards of safety, quality, and long-term stability.
This patent introduces a compact and highly secure anti-loosening device for steel cables, consisting of an anchor head, annular wedges, a fixed plate, and several hollow fasteners. The design effectively prevents steel cables from loosening under tension or over prolonged use, while allowing individual cable replacement without compromising the stability of the entire structure.
The fixed plate is positioned opposite the anchor head with a defined gap and features threaded holes aligned with the through-holes of the anchor. Hollow fasteners are screwed into these holes, allowing the tail ends of the steel cables to pass through. These fasteners apply axial pressure on the outer wedges, maintaining a strong gripping force on the cables and preventing slippage.
When replacement of a specific cable is required, only the corresponding hollow fastener needs to be unscrewed from the plate. This selective access design ensures that maintenance can be performed efficiently, without disrupting the remaining cables—reducing both labor and downtime.
This patented invention introduces an automated tapping machine specifically developed for prestressed wedge processing. It integrates a feeding rail, positioning device, and ejecting mechanism to achieve a fully automated process—from material input and precise positioning, to tapping and part ejection.
The positioning system securely holds each workpiece in place, ensuring high accuracy during the tapping process. Once completed, the ejecting mechanism promptly removes the finished part, allowing the machine to proceed seamlessly to the next. This streamlined and automated workflow significantly reduces labor time and production costs, while enhancing product consistency and operational efficiency.
Designed for mass production environments, this innovative solution is ideal for manufacturers of prestressed components used in bridges, skyscrapers, and precast structures. It represents a key advancement in intelligent manufacturing and industrial automation.
This invention introduces an advanced method to significantly enhance the mechanical strength of key structural elements—wedges, compression sleeves, and anchor heads—in post-tensioning systems.
Using high-grade steel, the process involves secondary spheroidizing and forging, which reorganizes the molecular structure for higher density and uniformity. During forging, the formation of holes, grooves, and tapered surfaces is precisely executed to improve geometric accuracy and post-processing strength.
For compression sleeves, an additional spheroidizing process restores optimal softness before undergoing high-frequency surface hardening, creating a unique hard-inner / soft-outer configuration that enhances grip under compression.
This patented method offers the following advantages:
．Increases tensile strength and stress capacity of anchor heads;
．Improves wedge gripping performance;
．Streamlines production processes and reduces material costs;
．Enhances structural safety and durability in critical applications.
Ideal for bridge construction, precast concrete systems, and high-rise prestressing applications, this innovation delivers both engineering performance and economic benefits.
This patented utility model introduces an enhanced post-tensioning device designed to strengthen anchor plates (anchor heads) through advanced heat treatment techniques, making it ideal for use in bridges, high-rise buildings, and other large-scale prestressed concrete structures.
Key innovation lies in the use of multiple through tapered holes on the anchor plate, whose inner surfaces are heat-treated (e.g., quenched) to achieve a hardened layer depth of over 2mm. The resulting dual characteristic of hard outer surface with a softer, ductile core allows the anchor to effectively accommodate embedded wedges, ensuring uniform stress distribution and preventing damage such as hole enlargement.
Advantages of this system include:
．Improved anchoring force and gripping performance;
．Higher resistance to tensile and shear loads;
．Enhanced fatigue resistance and long-term durability;
．Consistent material quality for stable prestress transfer;
．Higher construction safety, performance, and reliability.
This device sets a new benchmark in post-tensioning structural integrity and engineering excellence.
This utility model introduces a modular post-tensioning system device that enhances structural integrity and internal protection by improving the design of the anchor head, cover plate, and anchor frame.
Key structural innovations include:
．An anchorage head with a recessed groove containing multiple tapered holes and a grouting hole for precise strand positioning and secure wedge fixation.
．A cover plate with a corresponding through hole and multiple screw holes, enabling a tight, screw-fastened seal with the anchor head.
．An anchor frame equipped with a protruding rib ring and open slots, allowing for tight-fitting connection with grouting caps or couplers.
Benefits of this modular system include:
．Prevention of oxidation of internal strands, wedges, and springs, protecting long-term structural strength;
．Enhanced airtight and watertight sealing for safer construction and longer durability;
．Customizable modular assembly based on construction needs, improving on-site installation flexibility;
．Avoidance of structural degradation or unexpected damage due to environmental exposure.
This innovation elevates the overall efficiency, safety, and durability of post-tensioning construction in modern infrastructure.
This utility model presents a simple and easy-to-maintain cable anti-loosening device composed of an anchor head, annular wedges, a fixing plate, and hollow fixing members. Its structural design ensures secure cable fixation while allowing individual cable replacement without disturbing the other cables.
Key features:
．Fixing plate is positioned opposite the anchor head with a gap in between, featuring screw holes aligned with the anchor head perforations.
．Hollow fixing members are threaded into the fixing plate’s screw holes, allowing cable ends to pass through.
．The hollow fixing members exert pushing force on the annular wedges, maintaining a firm grip on the cables and preventing loosening.
．For cable replacement, simply unscrew the corresponding hollow fixing member without affecting the fixation of other cables.
Advantages:
．Simple structure with easy manufacturing and installation;
．Improved cable fixation safety and stability;
．Reduced labor and time costs for maintenance and replacement;
．Suitable for a wide range of prestressed and cable anchoring applications.
This utility model provides an improved compression-type splicing connector designed for the connection between the anchor seat and splicing device in prestressed structures. It features a flat plate-shaped main body with the
following characteristics:
．A joint surface located near the center on one side, with multiple stepped through-holes allowing steel strands to pass through and be positioned by wedges;
．A surrounding inclined lap surface without any protruding structures, reducing overall material usage;
．Multiple slots along the perimeter for securing steel strands, with the ends fixed firmly using a compression sleeve;
．The flat lap surface design without protrusions allows the overall steel strand length to be shortened after connection, saving material and further reducing costs.
Key advantages:
．Compact size, lightweight, and high material efficiency;
．Reduced manufacturing and installation costs;
．Maintains full splicing function and structural integrity;
．Suitable for various post-tensioning and steel cable splicing applications.
