In recent years, smart tensioning prestressed technology has developed rapidly and has been widely used in highways, railway bridges, and other fields. Smart tensioning has ensured the pretensioning of prestressed beams by digitizing, standardizing, standardizing, and informatizing the tensioning process. Pull quality, improve the management of the construction process. The application of the front-card jack in the intelligent tensioning makes the intelligent tensioning more safe and reliable, the operation easier, and the material saving, and the economic benefit is obvious.
It is a multi-purpose prestressed tensioning device that is easy to operate. Mainly used for single hole tensioning. It can also be used for pre-stressing, tensioning and troubleshooting, and can be applied to high-strength wire bundles and steel strands of various sizes.
Mono strand jack is one of the indispensable and important tools for tension anchoring construction of prestressed works. Any kind of jack is not a panacea. Jack structure, structure size and tension tonnage limit its scope of use. QYDC270-200 front card through-hole hydraulic jack is suitable for single-hole tensioning, group root anchoring, rooting, fault rectification, back-anchor, and tension-pulling. As for the strength of prestressed tendons, Φ15.24 steel strands and Φ12.7 strands below 2000 grades can be tensioned. If the parts are replaced/disconnected, they can be tensioned (with customer orders). Rebar, etc.
The mono strand jack is small, light and efficient. The important thing is that because of the short length (about 260mm) of the kcal steel strand. Especially suitable for high altitude or small space locations.
The mono strand jack is used in combination with a double circuit oil pump that is greater than or equal to 63Mpa.
Structural features
A. Both the tension cylinder and the return cylinder adopt double seals to improve the reliability of the seal. The small cylinder and the two cylinders, the small cylinder and the rear end cover, and the small cylinder and the tool ring are all keyed to prevent rotation. All use Gree ring or Stirrup seal, reliable sealing.
B. The two-cylinder and the piston head are designed as an integral form, avoiding the possibility of failure due to two-body welding or two-body threaded connection. Increased difficulty in processing, but increased reliability.
C. The improved design of wear rings and wear sleeves avoids the possibility of assembly-type force extraction and improves product reliability.
D. Wherever important parts are stressed, high-quality alloy structures or tool steels are selected to increase the hardness and increase the strength.
Technical parameter editing
Rated Tensile Force 270KN Through Hole Diameter <18mm
Rated oil pressure 62Mpa Dimensions Φ114×485mm
Tensile cylinder area 4398.2mm Weight 24kg
Stretching stroke 200mm Return oil pressure <10Mpa