Composite sheath cable body and manufacturing method thereof
A production method and cable technology, applied in the cable field, can solve the problems of the cable with a normal service life of less than 30 years, unsatisfactory resistance to organic vapors, poor aging resistance of HDPE, etc., and achieve good sealing and corrosion resistance. Strong, shielding water vapor effect
Active Publication Date: 2015-12-09
SHANGHAI PUJIANG CABLE
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Problems solved by technology
At present, the protection of steel wire is generally realized by double-layer high-density polyethylene (high-densitypolyethylene, HDPE for short). HDPE has excellent wear resistance, corrosion resistance, non-hygroscopicity, and good waterproof vapor performance. However, HDPE is a high-molecular polymer, and its resistance to organic vapors is not ideal, and its resistance to aromatic hydrocarbons and halogenated hydrocarbons is poor. Moreover, HDPE has poor aging resistance. The aging of HDPE will directly affect the anti-corrosion protection of steel wires.
Due to these defects of HDPE, the current normal service life of the cables is less than 30 years, and it is difficult to adapt to the design life of the bridge
Method used
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Embodiment 1
[0016] A composite sheath cable body, comprising a steel wire bundle 1, a wrapping tape 2, an inner polyethylene protective layer 3, an outer polyethylene protective layer 4 and an isolation film 5, such as figure 1 and figure 2 As shown, the specific structure is: the steel wire bundle 1 is twisted by steel wire 10, the wrapping tape 2 is wound on the outside of the steel wire bundle 1, the inner polyethylene protective layer 3 is wrapped on the outside of the wrapping tape 2, and the outer polyethylene protective layer Layer 4 is wrapped on the outside of the inner polyethylene protective layer 3, the isolation film 5 is arranged between the wrapping tape 2 and the inner polyethylene protective layer 3, the isolation film 5 is wound on the outer side of the wrapping tape 2, and the inner polyethylene protective layer 3 Wrapped on the outside of the isolation film 5, the isolation film 5 can be made of aluminum foil or aluminum-plastic composite film with a thickness of 0.01...
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The invention relates to the field of stay cables for cable-stayed bridges, in particular to a composite-sheathed stay cable body and a production method thereof. The composite-sheathed stay cable body comprises bundled steel wires (1), a wrapping tape (2), an inner polyethylene protective layer (3) and an outer polyethylene protective layer (4) and is characterized by further comprising an isolating membrane (5) disposed between the wrapping tape (2) and the inner polyethylene protective layer (3). The production method of the composite-sheathed stay cable body includes the sequential steps of wire stranding, wrapping tape winding, and protective layer extrusion molding and is characterized in that a step of isolating membrane coating is further performed between the wrapping tape winding step and the protective layer extrusion molding step. The composite-sheathed stay cable body is simple in structure, convenient to produce, high in airtightness, high in corrosion resistance and long in service life.
Description
technical field [0001] The invention relates to the field of cables used for cable-stayed bridges, in particular to a composite sheath cable body and a manufacturing method thereof. Background technique [0002] The cable is the upper structure of the cable-stayed bridge, and is the most important force-bearing part of the cable-stayed bridge, carrying the gravity of the bridge deck. The safety of the cable is related to the safe operation of the bridge, and is related to the safety of pedestrians and vehicles on the bridge. The cable is composed of a cable body and anchors at both ends of the cable body. The cable body is generally composed of high-strength galvanized steel wire and a polyethylene sheath. The steel wire is a stressed part, and the polyethylene sheath protects the steel wire from corrosion. Therefore, the service life of the steel wire is crucial to the safety of the bridge, and the quality of the anti-corrosion protection effect of the steel wire directly a...
Claims
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IPC IPC(8): E01D19/16D07B1/10D07B7/14
CPCD07B7/14D07B7/145D07B2201/2087D07B2201/2088D07B2201/2089D07B2501/203
Inventor 罗国强张海良朱金林顾庆华谢飞
Owner SHANGHAI PUJIANG CABLE