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Fire-resistant stay cable and manufacturing method thereof

A production method and technology of cable-stayed cables, applied in cable-stayed bridges, bridge parts, bridge materials, etc., can solve the problems of mechanical damage to the heat insulation layer, inconvenient construction and installation, and affect the heat insulation effect, so as to achieve heat insulation and weather resistance Improve performance, ensure safe use, and prolong service life

Pending Publication Date: 2020-08-18
江苏天龙玄武岩连续纤维股份有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent application 201811612472.7 discloses a flame-retardant cable, which has developed a completely different protection system from the original high-polyethylene protection, including: an outer fire-resistant rubber layer, and an inner layer made of water-based resin, polyphosphate amine, vermiculite, The thermal insulation layer composed of raw materials such as expanded graphite, perlite and water, in terms of the composition of the thermal insulation layer, the construction and installation after the completion of the production is not convenient, and the thermal insulation layer is easily damaged by machinery during the construction process, which not only affects the heat insulation effect and may cause damage to the wire bundle

Method used

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  • Fire-resistant stay cable and manufacturing method thereof
  • Fire-resistant stay cable and manufacturing method thereof
  • Fire-resistant stay cable and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for manufacturing a fire-resistant cable-stayed cable structure, the structure of which is: a combined structure of steel wire bundles + wrapping tapes + basalt fire-resistant thermal insulation layer (coated with a waterproof coating on the outer surface) + hot-melt wrapping tapes. The preparation process includes: Follow the steps below:

[0036] S1. The steel wire bundle is fastened and formed. After the steel wire bundles of the design specifications and quantity are drawn and tightened according to the requirements, the wrapping belt is tightened and formed according to a certain angle and overlapping width by a wrapping machine.

[0037] S2. Wrapped basalt fiber refractory heat insulation layer. Use a wrapping machine to tightly wrap the basalt refractory thermal insulation layer on the surface of the inner wrapping tape, and use high temperature resistant metal clamps to fix the refractory thermal insulation layer. The basalt refractory thermal insulat...

Embodiment 2

[0043] A method for making a fire-resistant cable-stayed cable structure, the structure of which is: a combined structure of steel wire bundle + wrapping tape + polyethylene sheath + fire-resistant heat insulation layer (coated with waterproof coating on the outer surface) + hot-melt wrapping tape , the preparation process is basically the same as in Example 1, the difference is that: the base cloth of the refractory thermal insulation layer adopts high-silica cloth, and the needle-punched felt adopts high-silica needle-punched felt, such as image 3 shown.

[0044] like Figure 4 As shown, the combustion test lasted for 30min, and the flame temperature rose to about 900°C within 300s, while the temperature inside the specimen increased slowly, and basically stabilized below 150°C after 1200s. The material complies with fire and heat insulation requirements.

Embodiment 3

[0046] A method for making a fire-resistant cable-stayed cable structure, the structure of which is: steel wire bundle + wrapping tape + polyethylene sheath + fire-resistant heat insulation layer (coated with waterproof coating on the outer surface) + hot-melt wrapping tape + fiber cloth The combined structure of the polyethylene sheath, the preparation process is basically the same as that of Example 2, the difference is that: the inner layer of the extrusion machine is covered with fiber cloth according to the design requirements, hot-melt polyethylene material is injected into the test mold, and the extrusion is started The machine extrudes the fiber cloth onto the surface of the hot-melt polyethylene, and at the same time extrudes the polyethylene material onto the surface of the wrapping tape, and the fiber cloth is basalt fiber cloth.

[0047] like Figure 5 As shown, the combustion test lasted for 30min, and the flame temperature rose to about 900°C within 300s, while t...

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PUM

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Abstract

The invention discloses a fire-resistant stay cable structure and a manufacturing method thereof. The fire-resistant stay cable structure comprises a combined structure of a steel wire bundle, a wrapping tape, a (high polyethylene sheath), a fire-resistant heat preservation and insulation layer (the outer side surface is coated with a waterproof coating), a hot melting wrapping tape and a (fiber cloth poly-high polyethylene sheath). Wherein the inner layer is composed of steel wire bundles, a wrapping tape and a high polyethylene sheath, the middle layer is composed of a fireproof heat preservation and insulation layer and a waterproof coating, and the outer layer is composed of a hot melting wrapping tape and a fiber cloth high polyethylene sheath. Through the cable structure, the purposes of water resistance, weather resistance, flame retardance, fire resistance and heat insulation are achieved.

Description

technical field [0001] The invention relates to the technical field of bridge stay cables, in particular to a fire-resistant stay cable and a manufacturing method thereof. Background technique [0002] In recent years, bridge fire accidents have occurred frequently, and some fire accidents have caused huge economic losses and social impacts. For the cable-stayed bridge whose main stress structure is the cable-stayed bridge, it is seriously affected by the fire, and the strength of the cable-stayed bridge is reduced and fails in the high-temperature environment of the fire, which may lead to the structural damage of the entire cable-stayed bridge. Therefore, a high-temperature-resistant cable-stayed bridge has been developed. Stayed cables have important practical significance. [0003] At present, most of the stay cables on the market use high polyethylene to protect the steel beams of the stay cables. Polyethylene has good water tightness and weather resistance, but it is ...

Claims

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Application Information

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IPC IPC(8): E01D19/16E01D11/04E01D101/30E01D101/40
CPCE01D11/04E01D19/16E01D2101/30E01D2101/40
Inventor 张少锦薛晓薇单桂军赵超刘畅弋安张成勇王勇姚健勇
Owner 江苏天龙玄武岩连续纤维股份有限公司