CN201975131U - Non-magnetic steel band armored flame resistant cable - Google Patents

Description

Non-magnetic steel tape armored fire-resistant cable

technical field

The utility model relates to the field of electrical products, in particular to a cable.

Background technique

In many places such as high-rise and super high-rise buildings, large entertainment venues, large-scale industrial and mining enterprises, and underground projects, cables are often laid densely. Once a fire occurs, the fire will spread to other departments and floors along the cables. According to the statistics of the fire department, more than 2/3 of urban fires are caused by the spread of cables caused by electrical equipment failures or overloaded cables. It is mainly the acid gas and toxic gas released after the cable is burned. The fire protection technology of cables has attracted more and more attention, and has become an important development direction of the cable industry.

Traditional fire-resistant cables are installed in copper tubes, and high-temperature-resistant solid materials are filled between the copper tubes and cables. Solid material filling equipment, longitudinal wrapping equipment, and welding equipment are required in the production and manufacturing process. Material and equipment investment costs are very high, thereby increasing manufacturing costs a lot. In addition, because the high temperature resistant protective sleeve is a copper tube structure filled with solid materials, the bending radius of the cable is very small, which brings a lot of inconvenience to the user in installation.

Utility model content

The purpose of this utility model is to provide a non-magnetic steel tape armored fire-resistant cable to solve the above technical problems.

The technical problem solved by the utility model can be realized by adopting the following technical solutions:

The non-magnetic steel tape armored fire-resistant cable includes a cable core, and the cable core includes a conductor core, an insulating layer arranged outside the conductor core, and a non-magnetic steel core is arranged on the outside of the cable core. A belt layer, the non-magnetic steel belt layer is provided with a sheath layer, and a ceramic silicon rubber material layer is arranged between the non-magnetic steel belt layer and the sheath layer, and the ceramic silicon rubber material layer constitutes 1. Fire protection layer.

The fire protection layer made of ceramic silicone rubber material has the basic characteristics of good elasticity of silicone rubber at room temperature, and is non-toxic, odorless, high and low temperature resistance, ozone aging resistance, weather aging resistance, excellent electrical insulation properties, and also has In addition to the good processing performance of ordinary high-temperature silicone rubber, it can maintain the state of flexible cables at minus 40 degrees to minus 200 degrees. When the flame is attacked and the temperature reaches above 300 degrees, the original soft state can be converted into a rigid sponge ceramic body. After hardening, holes will be generated inside the fire protection layer, which is conducive to heat preservation. In this way, the sponge ceramic body has remarkable fire resistance and high temperature resistance. The role of the cable, so as to effectively protect the internal structure of the cable from mechanical changes and electrical performance changes.

In addition, the fireproof protective layer of the present invention is arranged in the sheath layer, and the sheath layer can well protect the fireproof protective layer from the damage of the external environment during use. When the flame burns the sheath layer, due to the fireproof protective layer Under the action, it can well protect the inner conductor core.

A fire-resistant isolation layer is provided between the non-magnetic steel strip layer and the fire protection layer. The fire-resistant isolation layer further prevents the insulation layer and conductor core structure in the fire protection layer from changing in mechanical and electrical properties, thereby further ensuring that the utility model can normally supply power and communicate when burning.

The utility model has mechanical properties and electrical properties completely equivalent to ordinary cables, and there is no difference in the process of installation and use. Since there is no need to invest in any other auxiliary equipment, only two processes are added in the production, so that the manufacturing cost and maintenance cost are greatly reduced. After other functional composite layers are arranged between the cable core and the fire-resistant isolation layer, the utility model can be applied to non-magnetic cables of any specification and model.

The sheath layer can be a PE sheath layer made of PE material.

The fire-resistant isolation layer can be made of intumescent low-smoke, halogen-free, flame-retardant green material. The fire-resistant isolation layer can also use a metal thin film fire-isolation layer. The metal thin film fire-proof layer is a metal thin-film fire-proof layer formed by vertical wrapping of metal materials.

The cable core also includes an inner shielding layer, and the inner shielding layer is arranged between the conductor core and the insulating layer.

The cable core also includes an outer shielding layer, and the outer shielding layer is arranged between the insulating layer and the non-magnetic steel strip layer. Both the inner shielding layer and the outer shielding layer may adopt a braided shielding layer of a braided shielding structure. The braided shielding layer may be braided by tinned annealed copper wire. The double-layer shielding layer can ensure the flexibility and mechanical strength of the cable core, so that the shielding and anti-interference effect of the cable core is better.

A copper strip layer is provided between the outer shielding layer and the non-magnetic steel strip layer.

A wrapping tape is provided between the non-magnetic steel strip layer and the copper strip layer.

Beneficial effects: due to the adoption of the above technical scheme, the utility model uses ceramic silicon rubber material structure as the core refractory layer, and the refractory isolation layer as the auxiliary layer, which has remarkable refractory and high temperature blocking functions, thereby effectively protecting the cable core. The internal structure does not undergo mechanical changes and electrical performance changes.

Description of drawings

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

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific diagrams.

With reference to Fig. 1, the non-magnetic steel tape armored fire-resistant cable comprises a cable core, and the cable core includes a conductor core 11, an insulating layer 12 arranged outside the conductor core 11, and a non-magnetic steel tape is arranged outside the cable core. The belt layer 54 is provided with a sheath layer 4 outside the non-magnetic steel belt layer 54, and the sheath layer 4 can be a PE sheath layer made of PE material. A ceramic silicon rubber material layer is arranged between the non-magnetic steel strip layer 54 and the sheath layer 4 , and the ceramic silicon rubber material layer forms a fire protection layer 3 . The fire protection layer 3 made of vitrified silicone rubber material has the basic characteristics of good elasticity of silicone rubber at room temperature, and is non-toxic, odorless, high and low temperature resistant, ozone aging resistant, weather aging resistant, and excellent electrical insulation performance. It has the good processing performance of ordinary high-temperature silicone rubber, and can maintain the state of flexible cables at minus 40 degrees to minus 200 degrees. When the flame is attacked and the temperature reaches above 300 degrees, the original soft state can be converted into a rigid sponge ceramic body. After hardening, holes will be generated inside the fire protection layer 3, which is conducive to heat preservation. In this way, the sponge ceramic body has remarkable fire resistance and barrier properties. The role of high temperature, so as to effectively protect the internal structure of the cable from mechanical changes and electrical performance changes. In addition, the fireproof protective layer 3 of the present invention is arranged in the sheath layer 4, and the sheath layer 4 can well protect the fireproof protective layer 3 from the damage of the external environment in use. When the flame burns the sheath layer 4, Due to the action of the fire protection layer 3, the inner conductor core 11 can be well protected.

A fire-resistant isolation layer 2 is provided between the non-magnetic steel strip layer 54 and the fire protection layer 3 . The fire-resistant isolation layer 2 can be made of intumescent low-smoke, halogen-free, flame-retardant green material. The fire-resistant isolation layer 2 may also adopt a metal thin film fire-isolation layer. The metal thin film fire insulation layer is a metal thin film fire insulation layer formed by longitudinally wrapping metal materials. The setting of the fire-resistant isolation layer 2 further prevents the insulation layer 12 and the conductor core 11 structure in the fire protection layer 3 from changing in mechanical and electrical properties, thereby further ensuring that the utility model can normally supply power and communicate when burning. The utility model has mechanical properties and electrical properties completely equivalent to ordinary cables, and there is no difference in the process of installation and use. Since there is no need to invest in any other auxiliary equipment, only two processes are added in the production, so that the manufacturing cost and maintenance cost are greatly reduced. After other functional composite layers are arranged between the cable core and the fire-resistant isolation layer 2, the utility model can be applied to any type of non-magnetic cable of any specification.

The cable core also includes an inner shielding layer 13 arranged between the conductor core 11 and the insulating layer 12 . The cable core also includes an outer shielding layer 14 disposed between the insulating layer 12 and the non-magnetic steel strip layer 54 . Both the inner shielding layer 13 and the outer shielding layer 14 may adopt a braided shielding layer of a braided shielding structure. The braided shielding layer can be braided by tinned annealed copper wire. The double-layer shielding layer can ensure the flexibility and mechanical strength of the cable core, so that the shielding and anti-interference effect of the cable core is better. A copper strip layer 52 is also provided between the outer shielding layer 14 and the non-magnetic steel strip layer 54 . A wrapping tape 53 is provided between the non-magnetic steel strip layer 54 and the copper strip layer 52 .

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (10)

1. Non-magnetic steel tape armored fire-resistant cable, comprising a cable core, said cable core comprising a conductor core, an insulating layer arranged outside said conductor core, said cable core is provided with a non-magnetic A magnetic steel strip layer, the non-magnetic steel strip layer is provided with a sheath layer, it is characterized in that a ceramic silicon rubber material layer is arranged between the non-magnetic steel strip layer and the sheath layer, and the ceramic The silicone rubber material layer constitutes a fire protection layer. 2. The non-magnetic steel tape armored fire-resistant cable according to claim 1, characterized in that: a fire-resistant isolation layer is provided between the cable core and the fire protection layer. 3. The non-magnetic steel tape armored fire-resistant cable according to claim 1, characterized in that: the sheath layer is made of PE material. 4. The non-magnetic steel tape armored fire-resistant cable according to claim 2, characterized in that: the cable core also includes an inner shielding layer, and the inner shielding layer is arranged between the conductor core and the insulating layer. between layers. 5. The non-magnetic steel tape armored fire-resistant cable according to claim 4, characterized in that: the cable core also includes an outer shielding layer, and the outer shielding layer is arranged between the insulating layer and the non-magnetic between steel belt layers. 6. The non-magnetic steel tape armored fire-resistant cable according to claim 4, characterized in that: the inner shielding layer adopts a braided shielding layer of a braided shielding structure. 7. The non-magnetic steel tape armored fire-resistant cable according to claim 5, characterized in that: the outer shielding layer adopts a braided shielding layer of a braided shielding structure. 8. The non-magnetic steel tape armored fire-resistant cable according to claim 2, characterized in that: the fire-resistant isolation layer is a fire-resistant isolation layer made of an intumescent low-smoke, halogen-free, flame-retardant green material. 9. The non-magnetic steel tape armored fire-resistant cable according to claim 8, wherein a copper tape layer is provided between the outer shielding layer and the non-magnetic steel tape layer. 10. The non-magnetic steel tape armored fire-resistant cable according to claim 9, characterized in that: a wrapping tape is provided between the non-magnetic steel tape layer and the copper tape layer.

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