CN111434741A - Flexible main cable protective material - Google Patents

Abstract

The invention discloses a flexible main cable protective material. The protective material is mainly composed of a protective layer (1), a skeleton layer (2) and a film layer (3). Corresponding equipment vulcanizes the protective material by hot pressing, and solidifies it on the surface of the main cable to protect the main cable. The invention has excellent isolation and protection function, can effectively isolate the erosion of the main cable of the bridge from natural environments such as wind, frost, rain, snow, salt spray, and acidic atmosphere, and at the same time has good flexibility, and can adapt to the extension change of the main cable. , has a good isolation protection effect.

Description

A kind of flexible main cable protective material

technical field

The invention relates to the field of polymer materials, and the anti-corrosion protection of main cables of user suspension bridges.

Background technique

Suspension bridge, also known as suspension bridge, mainly bears the weight of the bridge pavement through the steel cable suspended on the cable tower. Among them, the service life of the main steel cable is particularly critical, which is directly related to the service life of the suspension bridge.

The traditional main cable protection method of suspension bridge is mainly the surface coating method of the main cable. The main cable is protected by applying paint, resin, liquid rubber and other materials to the surface of the main cable for physical isolation. The advantage of this method is that The construction and repair are simple and fast, but in the long-term use process, with the aging, cracking and falling off of the surface coating of the main cable, this method has gradually become unsuitable for the construction requirements of today's bridges, especially with the main cable. The application of the internal dry air dehumidification method has higher and higher requirements on the tightness of the main cable. By adopting the present invention, the main cable can be effectively isolated and protected, and the practical life of the bridge can be ensured.

SUMMARY OF THE INVENTION

Technical solution: In order to improve the above problems and meet the needs of modern bridge construction, the present invention designs a flexible main cable protective material, which is mainly composed of a protective layer (1), a skeleton layer (2), and a film layer (3).

The protective layer (1) is a polyolefin thermoplastic elastomer, which is colorless and transparent, and exhibits rubber elasticity at room temperature. It is cross-linked by heating at a temperature of 80°C to 130°C, and is cured and bonded to itself and other materials.

The skeleton material is polyester fiberglass cloth, the pores are 2-8mm, and the skeleton material can be dyed with various colors through treatment. The pigment and canvas have extremely strong color fastness, which is not easy to fall off and fade, and can ensure the main cable for a long time. The protective material is brightly colored.

The film layer (3) is made of polymer rubber material, which has excellent elasticity and weather resistance. Through the adjustment of the formula, various colors are given to the functional layer, the coloring strength is high, and the bridge is beautiful.

The flexible main cable protective material is formed into a semi-finished product by means of multi-stage calendering and lamination, and then the semi-finished product is vulcanized into a whole by a drum-type continuous vulcanization method.

In order to facilitate construction, the multi-layer composite main cable protective material that has been vulcanized and formed is cut into rubber strips with a width of 100-500mm and a length of 30m-300m, and is curled into rolls to facilitate construction operations.

During the construction process, the coiled flexible main cable protective material is loaded into the main cable winding machine for winding. During the winding process, it is necessary to keep the lap winding, and the lap width shall not be less than 10mm. At the same time, subsequent hot-melting personnel will use relevant equipment to perform hot-melting operation on the wound part, and solidify the overlapped main cable protective material into a whole, so as to realize the protective effect on the main cable.

Beneficial effects:

The invention can effectively isolate the erosion of the bridge main cable by the external environment by using the weather-resistant and ageing polymer rubber material and adopting the flexible main cable protective material formed by multi-stage calendering and vulcanization. Since the main material used in the flexible main cable protection material is a rubber polymer material with high elasticity, it can ensure that it can adapt to the main cable changes caused by external temperature differences, strong winds, earthquakes, and bridge load changes, and effectively protect the main cable. .

Description of drawings

Figure 1 is a structural diagram of a flexible main cable protective material;

Figure 2 is a schematic diagram of the flexible main cable protective material wrapping the main cable.

in:

In Figure 1: 1-protective layer, 2-skeleton layer, 3-film layer.

Detailed ways

Example: The protective layer (1) of the present invention uses colorless and transparent saturated polyolefin thermoplastic elastomer as the main material, which has good isolation effect and can prevent external air and ultraviolet rays from having an aging effect on the protective material of the flexible main cable. The skeleton layer (2) is a polyester glass fiber cloth with pores of 2-8 mm, which provides strength for the flexible main cable protective material. The film layer (3) is made of modified ethylene-propylene rubber, which has excellent weather resistance and elasticity, which can ensure that the wrapping tape moves with the main cable when the main cable is displaced, and at the same time ensures the sealing performance of the main cable.

The thickness of the protective layer is 0.3-1.0mm. The thickness of the skeleton layer is 0.1-0.3mm. The thickness of the film layer is 0.3-1.0mm. The flexible main cable protective material is designed in white as a whole according to the design requirements. The strength of the formed flexible main cable protective material is greater than 12MPa, the elongation at break is greater than 18%, and the peel strength of the canvas is greater than 5N/m.

After thermal curing simulation installation observation, the multi-layer composite main cable wrapping tape is lapped tightly and has no gaps, which can effectively prevent internal gas leakage, and realize the sealing, isolation and protection of the main cable. The construction is simple and meets the expectations. Design requirements, with practicability and market promotion value.

Claims (6)

1. A flexible main cable protective material is characterized by mainly comprising a protective layer (1), a framework layer (2) and a film layer (3).

2. The flexible main cable protective material according to claim 1, wherein the protective layer (1) is a polyolefin thermoplastic elastomer, which can be designed into various colors or colorless and transparent according to requirements, is rubber elastic at normal temperature, and is crosslinked by heating at a temperature of 80 ℃ to 130 ℃, so that the flexible main cable protective material has good adhesion with itself and other materials.

3. The flexible main cable protective material according to claim 1, wherein the framework material is polyester or fiberglass cloth, the pores are 2-8 mm, the framework material can be dyed in various colors through treatment, and the pigment and the canvas have extremely high color fastness, are not easy to fall off and fade, and can ensure bright color of the main cable protective material for a long time.

4. The flexible main cable protective material according to claim 1, wherein the film layer (3) is made of a high polymer rubber material, has excellent elasticity and weather resistance, is endowed with various colors by adjusting a formula, has high coloring strength, and realizes attractive appearance of a bridge.

5. The flexible main cable protective material according to claim 1, wherein the flexible main cable protective material is formed into a semi-finished product by multi-stage calendering and laminating, and the semi-finished product is vulcanized into a whole by a drum-type continuous vulcanization method.

6. The protective material for the flexible main cable according to claim 1, wherein the protective layer (1) and the film layer (3) are made of a high molecular elastomer material, have excellent elasticity and weather resistance, and are adjusted by a formula to provide good hot-melt property, thereby realizing melt bonding between the winding layers.

Images