CN201151871Y - Oblique pulling cable body with external surface enwound with PVC fluoride film adhesive tape and then spiral hooping - Google Patents

Abstract

The utility model relates to a stay cable body, the outer surface of which is wound with spiral reinforcement after being winded with PVF fluoride film belts. The stay cable body is characterized in that the cable body successively comprises a strand wire (1) of the stay cable, a high density polyethylene jacket (2), a PVF fluoride protective belt wining layer (3) and the spiral reinforcement (4) which is wound on the outside of the PVF fluoride protective belt wining layer (3). By winding the PVF fluoride film belt on the outer surface of the stay cable body before winding the spiral reinforcement, the stay cable body gives full play to the good weathering resistance of the PVF belt, guarantees the durability of the stay cable and simultaneously utilizes the hydrophobicity of the surface of the PVF belt surface and the winding spiral reinforcement to successfully restrain the flurry and excitation resistance of the stay cable.

Description

A stay cable body with spiral ribs wrapped around PVF fluoride film tape on the outer surface

technical field

The utility model relates to a stay cable body. Specifically, it relates to a stay cable body whose outer surface is wound with PVF fluoride film tape and then wound with spiral ribs. It belongs to the technical field of bridge cables.

Background technique

Usually, the anti-corrosion of stay cables is mainly protected by high-density polyethylene sheaths. At the same time, in order to solve the wind and rain-induced vibration of stay cables, aerodynamic measures such as embossing or winding spiral ribs are further adopted on the surface, as shown in Figure 1. However, in the past on many cable-stayed bridges, the high-density polyethylene sheaths of cable-stayed cables have cracked and damaged to varying degrees after being used for less than a few years. In order to further improve the anti-corrosion performance of cable-stayed cables, there are currently improvements The following two methods:

1. Wrap the parallel steel wire bundles with PVF fluorinated film tape before hot extrusion of high-density polyethylene to prevent moisture and other harmful substances from entering the cable body after the high-density polyethylene protective layer is damaged, as shown in Figure 2.

2. Wrap PVF tape after hot-extruding high-density polyethylene to improve the anti-ultraviolet performance of the stay cable, as shown in Figure 3.

However, the above two methods have the following disadvantages:

The first method, although it can provide another layer of protection after the high-density polyethylene sheath is damaged, it fails to improve the aging resistance of high-density polyethylene. At present, the aging resistance of high-density polyethylene has always been durable A bottleneck of the search.

The second method, although it makes good use of the good UV resistance of PVF fluorinated film tape, but the conventional winding outside the high-density polyethylene sheath cannot make good use of the anti-wind and rain vibration performance of the stay cable.

Contents of the invention

The purpose of this utility model is to overcome the above-mentioned deficiencies, and to provide a kind of anti-aging performance of high-density polyethylene, which can also play a good role in anti-wind and rain shock performance of the cable, and then wrap the outer surface of the PVF fluorinated film tape and then wind the spiral tendon stay cable body.

The purpose of this utility model is achieved in this way: a kind of stay cable body of outer surface wrapping PVF fluoride film adhesive tape and winding helical rib, it is characterized in that: described cable body comprises stay cable steel wire bunch, A high-density polyethylene sheath, a PVF fluorinated film protective tape wrapping layer and a spiral rib, the spiral ribs are wound outside the PVF fluorinated film protective tape wrapping layer.

PVF fluorinated film protective tape has high strength, excellent weather resistance, chemical inertness, stain resistance and easy cleaning performance. It can shield the sheath from ultraviolet rays and resist the erosion of air and rain outdoors. And it has good bonding strength with the polyethylene sheath, and can be completely attached to the surface of the cable sheath. Winding the spiral reinforcement outside the PVF tape is to solve the wind and rain induced vibration of the stay cable.

The utility model not only gives full play to the excellent weather resistance performance of the PVF tape, but also ensures the durability of the cable stay by wrapping the PVF fluorinated film tape on the external surface of the cable-stayed cable and then winding the spiral rib. The wound spiral reinforcement can well restrain the stay cable against wind and rain-induced vibration.

Description of drawings

Fig. 1 is a schematic diagram of a structure in which spiral bars are wound on the outer surface of a high-density polyethylene sheath in the past.

Fig. 2 is a schematic diagram of winding PVF fluorinated film tape on parallel steel wire bundles before hot extrusion of high-density polyethylene.

Fig. 3 is a schematic diagram of winding PVF tape after heat extruding high-density polyethylene in the past.

Fig. 4 is a structural schematic diagram of the utility model.

In the figure: stay cable steel wire bundle 1, high-density polyethylene sheath 2, PVF fluoride film protective tape 3 and spiral rib 4, galvanized steel wire 1.1, wrapping tape 1.2, colored high-density polyethylene sheath 2.1, black High-density polyethylene sheath 2.2.

Detailed ways

Referring to Fig. 4, the utility model relates to a stay cable body in which the PVF fluoride film tape is wound on the outer surface and then the spiral ribs are wound. Then spirally wrap a layer of PVF fluoride film protective tape, and finally wrap the spiral ribs outside the PVF tape.

Claims (1)

1, the suspension cable cable body of winding screw muscle behind a kind of external surface winding PVF fluoride membrane adhesive tape; it is characterized in that: described cable body comprises Cable Stayed Steel tow (1), high density polyethylene (HDPE) sheath (2), PVF fluorinated film protective tapes be wrapped layer (3) and a spiral bar (4) from the inside to the outside successively, and described spiral bar (4) is wrapped in PVF fluorinated film protective tapes and is wrapped outside layer (3).

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