CN202839094U - A kind of flexible environmental protection fireproof cable - Google Patents

Abstract

The utility model discloses a flexible environment-friendly fireproof cable, which comprises a cable core. The cable core is formed by twisting several insulated wire cores. The insulation layer wrapped outside the conductor isolation belt is composed of a filling layer in the gap of the cable core, and the isolation belt, inner sheath, and braided fastening layer are extruded in sequence outside the cable core, and the outermost layer of the cable core is extruded outer sheath. The utility model is a flexible environment-friendly fireproof cable with stable structure, good moving flexibility, good heat insulation and flame retardancy, halogen-free and non-toxic.

Description

A kind of flexible environmental protection fireproof cable

technical field

The utility model relates to the field of power cables, in particular to a flexible environment-friendly fireproof cable.

Background technique

Although the wire and cable industry is only a supporting industry, it accounts for 1/4 of the output value of China's electrical industry. It has a wide range of products and a wide range of applications, involving electric power, construction, communications, manufacturing and other industries, and is closely related to various departments of the national economy. It is an indispensable basic equipment for energy conversion and a necessary basic product in an electrified and informationized society. the

Wires and cables are one of the important ways to cause fires. According to incomplete statistics, one-third of the people who died in the fires caused by wires and cables were suffocated by inhaling the toxic gas released when the wires and cables burned. death, so fires caused by wires and cables cannot be ignored. The disasters that fire brings to human beings are serious and the losses are huge. With the development of economy and urban construction, fire losses are on the rise. Therefore, both at home and abroad attach great importance to fire prevention. How to prevent the burning of wires and cables, even if they are burned by an open flame, are still low-smoke and non-toxic, which is a major issue in the wire and cable manufacturing industry. In recent years, my country has developed and produced a variety of fire-resistant, fire-resistant and other types of flame-retardant and environmentally friendly cables. Because non-environmentally friendly cables produce a large amount of toxic and harmful gases when they burn, causing death, as well as equipment damage and severe smoke that prevent people from evacuating in time, the user proposed that the cables should not only have good flame retardant properties, but also the gas produced after burning Halogen-free acid (hazardous gas) and low smoke emission, the best cable should be fire-resistant and fire-resistant in case of fire, thus developing a halogen-free, low-smoke, flame-retardant, fire-resistant, and fire-resistant environmentally friendly cable. Such cables include power cables, control cables, optical cables, construction lines and data cables, used in key projects such as underground railways, power stations, chemical plants, ships, high-rise buildings, and information industries, as well as personnel and equipment-intensive places. Development, high and new technologies are constantly updated, and products are developed to a high level. The variety and quantity of halogen-free, low-smoke, flame-retardant, fire-resistant, and fire-resistant environmentally friendly cables are greatly increasing. the

Conventional wires and cables are serious sources of pollution, which will produce a large amount of dioxins, lead, halides and other public hazards during their manufacture, use and disposal. In recent years, Europe, the United States and Japan have attached great importance to the pollution related to electric wires. Their governments have not only imposed strict restrictions on the emissions from the cable manufacturing process, but also implemented comprehensive monitoring on the disposal of scrap cables, forcing cable manufacturers to use them in line with environmental protection. The required materials replace traditional materials. The use of polyvinyl chloride wires and cables will be prohibited in important buildings to avoid a large amount of smoke and chlorine gas in the event of a fire, causing more casualties. The use of halogen-free and low-smoke cross-linked polyolefin insulated wires and cables has become a According to the local regulations of the region, with the increase of environmental protection awareness, the application of this type of wire and cable will gradually expand. If the cable has both halogen-free, low-smoke, flame-retardant, fire-resistant and fire-resistant functions, it will be more popular. the

In recent years, various types of flame-retardant and fire-resistant cables developed by many domestic wire and cable manufacturers have the following problems: one is that the flame-retardant cables are mainly considered from a passive perspective. The cables do not produce smoke and toxic gases when burned after a fire , once the cable breaks out in a fire and burns, it is difficult to protect the integrity of the cable’s internal body, that is, it cannot guarantee the uninterrupted power supply of the circuit in a fire state; another type of fire-resistant cable is mainly to add a layer of refractory material on the conductor of the cable (mainly It is mica tape), under high temperature burning, it is generally difficult to protect the integrity and reliability of the main part of the cable insulation; there is another type of fireproof cable, mainly mineral insulated cables, which have high processing procedures, high breakdown rate of finished products, Lack of corresponding flexibility, it cannot be used in places where flexibility is required. the

Utility model content

The technical problem to be solved by the utility model is to provide a flexible environment-friendly fireproof cable with stable structure, good moving flexibility, good heat insulation and flame retardancy, halogen-free and non-toxic. the

A flexible environment-friendly fireproof cable described in the utility model includes a cable core, and the cable core is formed by twisting several insulated wire cores, and a filling layer is arranged at the gap between the cable cores, and is sequentially extruded outside the cable core. The isolation belt, the inner sheath, the braided fastening layer, and the outer sheath are extruded on the outermost layer of the cable core. the

There are four insulated wire cores; the insulated wire cores are composed of conductors, conductor isolation strips extruded outside the conductors, and insulating layers extruded outside the conductor isolation strips. the

The conductor is formed by stranding a plurality of monofilaments. the

The braided fastening layer is a quartz/high silica glass fiber braided layer. the

The beneficial effects of the utility model are:

1. The cable conductor is formed by twisting multiple monofilaments, which has the characteristics of stable structure and soft movement;

2. The inner protective layer is made of ceramic silicon rubber, which is soft, halogen-free, non-toxic, tasteless, and has no adverse effects on the human body and the natural environment. The smoke after burning is very small, has no smoke toxicity, and has no harm to the human body. Its biggest feature is that it can be fired into a hard ceramic-like hard shell protective layer in the event of fire and high temperature. In the case of fire, the smooth flow of electricity and communication. Its main performance indicators are - good heat insulation, thermal conductivity 0.0033W/Mk, especially after ablation, it forms a hard ceramic-like armor and the inside is uniform honeycomb, which has better fire resistance and heat insulation ; Good flame retardancy, oxygen index above 32.

3. The braided fastening layer is woven with quartz/high silica glass fiber outside the inner sheath. This material still maintains its physical and chemical properties at 1000°C to prevent the shell from falling off after the inner sheath is fired and sintered to protect Integrity of the cable core. the

4. The outer protective layer is made of environmentally friendly polyurethane elastomer (TPE), which has the characteristics of flame retardancy, softness, wear resistance and flex resistance.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways:

As shown in Figure 1, a flexible environment-friendly fireproof cable described in the utility model includes a cable core, and the cable core is formed by twisting several insulated wire cores, and a filling layer 4 is provided at the gap between the cable cores. Extrude isolation belt 5, vitrified silicone rubber inner sheath 6, and braided fastening layer 7 sequentially outside the cable core, and extrude outer sheath 8 on the outermost layer of the cable core. The insulated wire core is composed of a conductor 1 , a conductor isolation strip 2 extruded outside the conductor 1 , and an insulating layer 3 extruded outside the conductor isolation strip 2 .

The utility model provides a structure form and implementation method of a flexible environment-friendly fireproof cable. The above description is only a preferred implementation method of the utility model. Under the premise of the principle, some improvements can also be made, and these improvements should also be regarded as the protection scope of the present utility model. the

Claims (4)

1. flexible environment friendly fireproof cable, it is characterized in that: comprise cable core, its cable core is to form by several insulated wire cores are stranded, gap location at cable core is provided with packed layer (4), outside cable core, extrude successively isolation strip (5), inner sheath (6), braiding fastened layer (7), extrude oversheath (8) at the outermost layer of cable core.

2. flexible environment friendly fireproof cable according to claim 1, it is characterized in that: described insulated wire cores is four; Its insulated wire cores is by conductor (1), is extruded in the outer conductor isolation strip (2) of conductor (1) and is extruded in outer insulating barrier (3) formation in conductor isolation strip (2).

3. flexible environment friendly fireproof cable according to claim 1 and 2, its special type is: described conductor (1) by multifilament through restrainting stranded forming.

4. flexible environment friendly fireproof cable according to claim 1, it is characterized in that: described braiding fastened layer (7) is quartz/resurrection glass fibre braid.

Images