CN209989698U

CN209989698U - Flame-retardant inhaul cable

Info

Publication number: CN209989698U
Application number: CN201822217191.3U
Authority: CN
Inventors: 王强; 徐军荣; 陈治良; 庞维林; 庞贤剑
Original assignee: Liuzhou Owim Machinery Co Ltd
Current assignee: Liuzhou Owim Machinery Co Ltd; Liuzhou OVM Machinery Co Ltd
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2020-01-24
Anticipated expiration: 2028-12-27

Abstract

The utility model relates to a be applicable to bridge cable technical field, specifically be a fire-retardant cable, twine band, insulating layer and fire-proof rubber layer including the cable body, polyurethane twine the band cladding and are in the cable body surface, the insulating layer cladding is in the surface of polyurethane twines the band, the cladding of fire-proof rubber layer is in the surface of insulating layer, the fire-proof rubber layer is formed through polymerization by the raw materials composition including water-based resin, ammonium polyphosphate, vermiculite, expanded graphite, pearlite and water. The fireproof rubber layer has excellent heat resistance, cold resistance and corrosion resistance, is slightly influenced by environmental factors, is easy to be industrially manufactured into a full-fireproof cable body, reduces the installation difficulty, increases the fireproof function of the stay cable, and solves the problem of stress cracking of the high-density polyethylene on the outer layer of the traditional stay cable.

Description

Flame-retardant inhaul cable

Technical Field

The utility model relates to a be applicable to bridge cable technical field, specifically be a fire-retardant cable.

Background

The stay cable is a key component applied to high-altitude engineering structures such as bridges, buildings and the like, the existing commonly used stay cables comprise parallel steel wire stay cables, steel strand stay cables and the like, when the stay cable is used, a fireproof coating layer or a fireproof wrapping tape is generally arranged on the steel wire bundle to achieve a fireproof effect, and the high-density polyethylene (HDPE) extruded (wrapped) outside serves as an outer sheath to play a role in corrosion prevention. For example, chinese patent CN2644470Y discloses a fireproof cable, wherein a fireproof coating layer or a fireproof wrapping tape is disposed on the outer surface of the steel cable body, and the used fireproof high-density Polyethylene (PE) coating layer reaches the level of the existing fireproof material in the relevant standard. However, the technical scheme still has a certain problem, the requirement on the fireproof performance of the stay cable is more and more emphasized in the engineering design at present, the high-density polyethylene outer sheath mainly protects the steel cable bundle from being corroded by external factors, however, the high-density polyethylene outer sheath is easily subjected to stress cracking under the condition that the stay cable is stressed, the steel cable body cannot be effectively protected and prevented from corrosion, and meanwhile, the high-density polyethylene (HDPE) is poor in flame retardant performance and easy to burn in case of fire, so that the stay cable is subjected to stress failure under the high-temperature combustion condition, and destructive disasters are brought to bridges and building engineering.

SUMMERY OF THE UTILITY MODEL

A flame-retardant inhaul cable is characterized in that: the cable comprises a cable body, a polyurethane wrapping belt, a heat insulation layer and a fireproof rubber layer, wherein the polyurethane wrapping belt is wrapped on the outer surface of the cable body, the heat insulation layer is wrapped on the outer surface of the polyurethane wrapping belt, the thickness of the heat insulation layer can be set according to different fireproof requirements, the fireproof rubber layer is wrapped on the outer surface of the heat insulation layer, and the fireproof rubber layer is made of expanded perlite synthetic rubber.

Compared with the conventional synthetic rubber, the expanded perlite synthetic rubber adopted by the fireproof rubber layer has the advantages that the heat-resistant temperature can reach more than 300 ℃, the fire-fighting requirement of the inhaul cable is met, the expanded perlite synthetic rubber is nontoxic and tasteless, has high expansion multiple, does not support combustion in a fire-resistant experiment, can not only resist fire, but also expand by heating and form an even and compact cellular or spongy heat insulation structure. The structure is simple to manufacture, and the cost of the expanded perlite synthetic rubber is low. The fireproof cable body is easy to be manufactured in a factory, the installation difficulty is reduced, the cost is low, and the fireproof effect is better; the expanded perlite synthetic rubber is a high-elasticity polymer, has excellent heat resistance, cold resistance and corrosion resistance, is slightly influenced by environmental factors, is not easy to crack and age, and solves the problem of stress cracking of the outer layer high-density polyethylene (HDPE) of the traditional inhaul cable.

Preferably, the expanded perlite synthetic rubber is prepared by polymerization of a raw material composition comprising aqueous resin, ammonium polyphosphate, vermiculite, expanded graphite, perlite and water. Compared with the conventional synthetic rubber, the synthetic rubber of the component has the characteristics of no toxicity, no smell and high expansion factor, and can expand by heating and form a uniform and compact cellular or spongy heat insulation structure.

Preferably, the fireproof rubber layer is arranged on the outer surface of the heat insulation layer in a coating mode or a formed and sleeved mode. The manufacturing is convenient, the cost is low, the diameter of the stay cable is reduced, the wind resistance is favorably reduced, and the potential safety hazard caused by the vibration of the stay cable is avoided.

Preferably, the raw material composition of the expanded perlite synthetic rubber also comprises a perlite tail powder component, and after the perlite tail powder is added, the fireproof rubber layer is light in weight, low in heat conductivity coefficient, capable of enhancing the heat insulation effect, capable of reducing the cost of the synthetic rubber and environment-friendly.

Preferably, the cable body is made of one of a steel strand, a steel wire or a steel wire rope, and the high-strength steel wire is adopted, so that the working stability and reliability of the inhaul cable are improved.

Preferably, the thickness of the fireproof rubber layer is set according to fireproof time and fireproof temperature so as to meet the use requirements of different inhaul cables.

The utility model has the advantages that:

1. the outer High Density Polyethylene (HDPE) of cable of substitution of one deck fireproof rubber layer of cable body, can be heated the inflation and form even and fine and close cellular or spongy heat-insulating structure, add one deck insulating layer between fireproof rubber layer and polyurethane twine the band, increased cable fire prevention function, solved traditional cable outer layer High Density Polyethylene (HDPE) stress cracking's difficult problem.

2. The manufacturing is simple, the full fireproof cable body is easy to be manufactured in a factory, the installation difficulty is reduced, and the construction efficiency is improved; the cable has the advantages of low cost, simple structure and small cable diameter, is beneficial to reducing wind resistance, and avoids potential safety hazards caused by cable vibration.

Drawings

FIG. 1 is a schematic structural view of a flame retardant cable

In the figure: 1. a cable body; 2. a polyurethane wrapping tape; 3. a thermal insulation layer; 4. a fire-retardant rubber layer.

Detailed Description

The invention will be further explained with reference to the drawings and the detailed description below:

the utility model provides a fire-retardant cable, includes cable body 1, polyurethane twine band 2, insulating layer 3 and fire prevention rubber layer 4, polyurethane twines the band 2 cladding and is in cable body 1 surface, polyurethane twines the band 2 and twines the steel strand wires of cable body 1 fixedly, the cladding of insulating layer 3 is in polyurethane twines the band 2 surface, the cladding of fire prevention rubber layer 4 is in insulating layer 3 surface, fire prevention rubber layer 4 is by carrying out polymerization under initiator and catalyst action by the raw materials composition combination auxiliary agent including water-based resin, ammonium polyphosphate, vermiculite, expanded graphite, perlite and water according to a certain proportion and forms, the auxiliary agent be plasticizer, defoaming agent, forming agent and mould inhibitor. The synthetic rubber with the components can not only resist flame and fire, but also expand when heated and form a uniform and compact cellular or spongy heat insulation structure.

The fireproof rubber layer 4 is arranged on the outer surface of the heat insulation layer 3 in a coating mode; the raw material composition of the expanded perlite synthetic rubber also comprises a perlite tail powder component; the cable body 1 is made of steel strands, and the polyurethane wrapping belt 2 wraps and fixes the steel strands to form the cable body 1.

The heat-insulating layer 3 is an ultra-thin (thickness is less than or equal to 3mm) structure fireproof coating, which is compounded by taking polymethacrylate with a special structure, amino resin, chlorinated paraffin and the like as a base material adhesive, taking high-polymerization-degree ammonium polyphosphate, pentaerythritol, melamine and the like as a fireproof flame-retardant system, adding inorganic refractory materials such as titanium dioxide, wollastonite and the like, and taking No. 200 solvent naphtha as a solvent to compound.

In another embodiment of the present invention, the embodiment is different from the above-described embodiments in that the expanded perlite synthetic rubber is formed by polymerization of a raw material composition comprising an aqueous resin, ammonium polyphosphate, vermiculite, expanded graphite, perlite tailings and water; the cable body 1 is made of a steel wire rope, and the fireproof rubber layer 4 is sleeved on the outer surface of the heat insulation layer 3 after being processed into a sleeve. The heat-insulating layer 3 is a thin (the thickness is more than 3 and less than or equal to 7 mm) structure fireproof coating, uses a water-based polymer as a base material, and is matched with a flame retardant composite system, a fireproof additive, a fireproof fiber and the like.

In another embodiment of the present invention, the embodiment is different from the first embodiment in that: after the fireproof rubber layer 4 is processed into a sleeve, the sleeve is sleeved on the outer surface of the heat insulation layer 3. The cable body 1 is made of steel wire. The heat-insulating layer 3 is made up by using thick (7-45 mm) fire-resisting paint, using inorganic cementing material (such as silica sol, aluminium phosphate salt and refractory cement), adding inorganic light heat-insulating aggregate material (such as expanded perlite, expanded vermiculite, sea stone, floating bead and flyash), fire-resisting additive, chemical agent and reinforcing material (such as aluminium silicate fibre, rock wool, ceramic fibre and glass fibre) and filling material through a certain mixing process.

Claims

1. A flame-retardant inhaul cable is characterized in that: including cable body (1), polyurethane twine band (2), insulating layer (3) and fire-proof rubber layer (4), polyurethane twine band (2) cladding is in cable body (1) surface, insulating layer (3) cladding is in polyurethane twines band (2) surface, fire-proof rubber layer (4) cladding is in insulating layer (3) surface, fire-proof rubber layer (4) adopt expanded perlite synthetic rubber to make.

2. A flame retardant cable according to claim 1, characterized in that: the fireproof rubber layer (4) is arranged on the outer surface of the heat insulation layer (3) in a coating mode or a formed and sleeved mode.

3. A flame retardant cable according to claim 1 or 2, characterized in that: the cable body (1) is made of one of steel strands, steel wires or steel wire ropes.