CN201301432Y - Compound corrosion-preventing type pulling cable - Google Patents

Abstract

The utility model relates to a pulling cable in the technical field of bridge and building projects, in particular to a compound corrosion-preventing type pulling cable. The inner part of the compound corrosion-preventing type pulling rope is steel wires, galvanizing layers are arranged on the surfaces of the steel wires, corrosion-preventing chemical layers are filled in gaps among the steel wires, and a black polyethylene protection layer and a colorful polyethylene protection layer are arranged at the periphery of the whole body in a plastic-extruding manner. The compound corrosion-preventing type pulling cable well improves the corrosion-preventing property of the pulling cable, so as to prolong the service life of the pulling cable and bridges.

Description

Composite anti-corrosion cable

technical field

The utility model relates to a cable in the technical field of bridges and construction engineering, in particular to a composite anti-corrosion cable.

Background technique

With the continuous development of national infrastructure, the demand for cables in bridges and buildings is increasing, especially with the advancement of technology, the requirements for the use of cables are getting higher and higher, among which the service life of cables And anti-corrosion performance requirements are particularly prominent, especially for cable-stayed bridges, the service life of the cable itself will directly affect the service life of the bridge itself. At present, the commonly used stay cables are mostly parallel steel wire stay cables, and the anti-corrosion measures adopted are mainly protected from the following aspects: First, the surface of the steel wires used in the stay cables is galvanized, which can be used for a long time The inner layer protects the steel wire from corrosion; the second is to extrude a layer of black high-density polyethylene sheath on the outer layer of the steel wire, but because the black high-density polyethylene sheath is not strong in UV resistance, it is easy to age for a long time, so Most stay cables will also use the third method below; third, extrude a layer of high-performance colored high-density polyethylene sheath about 2-3mm thick outside the black high-density polyethylene sheath, the color high-density polyethylene sheath The polyethylene sheath can be used for a long time due to its good anti-ultraviolet properties, and has been widely used on stay cables. However, in some harsh climate environments, the service life of the cables is often short. According to the analysis of the cross-sections of some cables for maintenance and replacement, it is found that most of the cables have no damage to the double-layer PE on the surface. The internal steel wire was corroded. After analysis, it was found that due to the gap between the cable steel wire and the polyethylene sheath, the residual moisture in the air corroded the steel wire, which would be more serious after a long time.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a composite anti-corrosion cable. The utility model has the effect of better improving the anti-corrosion performance of the cables to increase the service life of the cables and the service life of the bridge.

The utility model is realized through the following technical proposals. The composite anti-corrosion cable of the utility model has steel wires inside, a galvanized layer on the surface of the steel wires, and an anti-corrosion compound layer is filled in the gaps between the steel wires, and then extruded on the periphery of the whole Black polyethylene sheath and colored polyethylene sheath.

The anti-corrosion compound layer may specifically be an anti-corrosion grease layer.

The black polyethylene sheath has a thickness of 2-3mm.

The color polyethylene sheath has a thickness of 2-3mm.

The production process of the utility model: the composite anti-corrosion cable uses galvanized steel wire as the raw material, and the steel wire is unloaded. The polyethylene sheath is then cut according to the blanking length, the two ends are anchored, and finally super-tensioned.

Compared with the prior art, the utility model composite anti-corrosion cable has the following beneficial effects:

Since the anti-corrosion compound (anti-corrosion grease) is filled between the steel wire and the black polyethylene sheath, the formation of water vapor inside the cable can be effectively avoided, and the formation and flow of condensed water can be avoided, effectively playing the role of anti-corrosion and anti-corrosion , prolong the service life of the cable.

After the stay cable is twisted at a large pitch, in the process of use, due to the long-term repeated load of the bridge, there is a certain contact wear between the steel wires, which will seriously affect the service life of the steel wires. After being filled with anti-corrosion compound (anti-corrosion grease), the grease can lubricate and reduce friction, thereby prolonging the service life of the cable.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of the utility model.

1-steel wire, 2-galvanized layer, 12-anti-corrosion compound layer, 13-black polyethylene sheath, 14-colored polyethylene sheath.

Detailed ways

Below in conjunction with accompanying drawing, the embodiment of the present utility model is described in detail: present embodiment is carried out under the premise of technical scheme of the present utility model, has provided detailed implementation, but protection scope of the present utility model is not limited to following Example.

The composite anti-corrosion dragline of this embodiment comprises: an internal steel wire 1, and the outer surface of the steel wire has four protective layers successively: firstly, the galvanized layer 11 on the surface of the steel wire, and secondly, an anti-corrosion compound layer 12 is filled in the gap between the steel wires (specifically Optional anti-corrosion grease layer), and then integrally extrude a black polyethylene sheath 13 and a colored polyethylene sheath 14 on the periphery, the specific structure is shown in Fig. 1.

The production process of the utility model composite anti-corrosion cable:

1. Zinc steel wire blanking;

2. Twisted and filled with anti-corrosion grease in the steel wire gap;

3. Extruded double-layer polyethylene sheath;

4. Cut off according to the cutting length, and make anchors at both ends;

5. Perform hypertensioning.

Claims (4)

1. anti-corrosion type composite inhaul cable, inside is steel wire, Steel Wire Surface is provided with zinc coat, it is characterized in that, is filled with the corrosion preventive compound layer in the slit between steel wire, in overall peripheral extrusion molding black polyethylene sheath and colored polyethylene sheath again.

2. anti-corrosion type composite inhaul cable as claimed in claim 1 is characterized in that, described corrosion preventive compound layer is anticorrosion oil layer.

3. anti-corrosion type composite inhaul cable as claimed in claim 1 is characterized in that, described black polyethylene sheath, its thickness are 2-3mm.

4. anti-corrosion type composite inhaul cable as claimed in claim 1 is characterized in that, described colored polyethylene sheath, and its thickness is 2-3mm.

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