CN2299886Y - Core oiled adhesiveless prestressed steel strand - Google Patents

Abstract

The utility model relates to a core oiled non-cohesive prestressed steel strand which comprises a plastic sheath at the outmost periphery, an outer layer steel wire and a core layer steel wire, wherein a grease layer is arranged between the plastic sheath and the outer layer steel wire, and the grease layer is filled between the core layer steel wire and the outer layer steel wire. Because the grease layer is arranged between the core layer steel wire and the outer layer steel wire, the anticorrosion property of the utility model is improved, the service life of the utility model is extended, and thus the engineering quality is enhanced.

Description

The un-bonded prestressed steel strand of in-core oiling

The utility model relates to a kind of un-bonded prestressed steel strand of in-core oiling.

Un-bonded prestressed steel strand is one of important materials of prestressed structure, its corrosion resistance directly influences construction quality, existing un-bonded prestressed steel strand all is coated with unbonded prestressing tendon special anti-corrosion lubricating grease at the prestress wire outer surface, use extrusion way plastic-coated layer of polyethylene sheath outside it again, directly oiling of the core wire of the un-bonded prestressed steel strand of Zhi Zuoing in this way, its antiseptic property is very unreliable, therefore, be necessary to provide a kind of un-bonded prestressed steel strand of in-core oiling.

The purpose of this utility model provides a kind of un-bonded prestressed steel strand of in-core oiling, oiling in this strand core, and antiseptic property is good, long service life.

For achieving the above object, the utility model is taked following design: the un-bonded prestressed steel strand of this in-core oiling comprises the plastic sheath of outermost, cover wire, the sandwich layer steel wire, between sheath and cover wire, be oil layer, it is characterized in that the oil layer for being full of between described sandwich layer steel wire and the cover wire.

The utility model is described in further detail below in conjunction with accompanying drawing

Fig. 1 is a cross-sectional view of the present utility model

Fig. 2 is used for the spreader schematic diagram of un-bonded prestressed steel strand in-core oiling

Among Fig. 1,1 is the plastic sheath of outermost, can adopt vinyon, 3 is the steel strand wires cover wire, and oil layer 2 is arranged between sheath and cover wire, and grease adopts unbonded prestressing tendon special anti-corrosion lubricating grease, 4 is the sandwich layer steel wire, oil layer 2 is arranged between sandwich layer steel wire and cover wire, and when steel strand wires were seven steel wires, sandwich layer was a steel wire.

7 is sleeve I among Fig. 2, its termination one imports end cap 6, the center that imports end cap has the through hole that supplies steel strand, another termination one bearing block 8 of sleeve I, and bearing inner ring is adorned a stretcher 9, another termination sleeve of bearing block II 10, cover is adorned an outlet end cap 11 to the other end of II, and the outlet end cap center has bellmouth, connects a dummy pipe 12 on the end cap, C, D are tank filler sleeve.

Steel strand wires, enter in the sleeve II after stretcher launches and cover with paint, lacquer, colour wash, etc. grease to stretching into from A, and steel wire is through outlet end cap, and each steel wire plying is full of grease around the steel wire, and steel strand wires are sent (B to) from dummy pipe.

The utility model advantage, these steel strand wires have the oil layer between outer steel wire and sheath, and sandwich layer is with outer Be the oil layer that is full of between the steel wire of layer, improved the antiseptic property of steel strand wires, prolong steel strand wires service life.

Claims (1)

1, a kind of un-bonded prestressed steel strand of in-core oiling, it comprises the plastic sheath of outermost, cover wire, sandwich layer steel wire, between sheath and cover wire, be oil layer, it is characterized in that the oil layer for being full of between described sandwich layer steel wire and the cover wire.

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