CN112908545A

CN112908545A - High-strength flexible fireproof and fire-resistant cable and manufacturing method thereof

Info

Publication number: CN112908545A
Application number: CN202110285889.2A
Authority: CN
Inventors: 祁登权; 龚敏; 杨海艳
Original assignee: Chongqing Taishan Cable Co Ltd
Current assignee: Chongqing Taishan Cable Co Ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-06-04
Also published as: WO2022193736A1

Abstract

The invention discloses a high-strength flexible fire-resistant and fire-resistant cable and a manufacturing method thereof. The cable comprises a cable core. The cable core is provided with a flame-retardant and fire-resistant tape layer, a copper sheath, an oxygen barrier layer and an armor in sequence. layer and outer sheath, the cabling core consists of at least one insulated wire core and a filling layer, and the insulated wire core includes a conductor and its refractory layer and insulating layer sequentially arranged outside the conductor. A high-strength flexible fire-resistant and fire-resistant cable designed by this scheme and its manufacturing method are mainly suitable for skyscrapers (high-rise buildings), and have the advantages of impact, tensile and compressive resistance and high-strength flexibility.

Description

High-strength flexible fireproof and fire-resistant cable and manufacturing method thereof

Technical Field

The invention relates to a cable, in particular to a high-strength flexible fireproof cable.

Background

Along with the rapid development of cities in China, high-rise buildings, large office buildings, hospitals and comprehensive business circles in China are more and more, rail transit is more and more developed, common fire-resistant cables cannot meet market requirements, fire-resistant cables in the market are various in types and complex in structure, different fire-resistant cable structures are used in different environments, and for the phenomenon, it is very necessary to design a flexible fire-resistant cable with high strength to meet the application requirements of the high-rise buildings.

Nowadays, the skyscrapers around the world are increased year by year in the continuous development of global economy, the skyscrapers become brand symbols of cities of various countries, statistics is made that more than one hundred skyscrapers with the length of more than 300 meters are built and planned and constructed all over the world, forty skyscrapers are calculated in China and account for about 40 percent of the total skyscrapers in the world, the cables required in the places of the skyscrapers (high-rise buildings) are extremely high in requirements, and the research on the high-strength flexible fireproof and fire-resistant cable has great significance in performance, high-strength tensile strength and capability of bearing great external force impact.

Therefore, those skilled in the art are dedicated to develop a high-strength flexible fireproof fire-resistant cable, especially a flexible fireproof fire-resistant cable with high strength, which is subjected to external impact, tensile strength and compressive strength, and is mainly applied to skyscrapers (high-rise buildings), and for laying cables with a relatively high vertical distance, the cable meets the requirement of the integrity test of the cable at high flame temperature, and data transmission and normal system communication in the cable.

Disclosure of Invention

In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a high-strength flexible fireproof cable, which is mainly used for cable laying in a skyscraper (high-rise building) with a relatively high vertical distance, can resist external impact, resist tension generated by long-distance laying itself, resist pressure, and have high-strength flexibility.

In order to achieve the purpose, the invention provides a high-strength flexible fireproof and fire-resistant cable which comprises a cabling cable core, wherein a flame-retardant and fire-resistant belting layer, a copper sheath, an oxygen isolation layer, an armor layer and an outer sheath are sequentially arranged outside the cabling cable core, the cabling cable core comprises at least one insulating cable core and a filling layer, and the insulating cable core comprises a conductor, and a fire-resistant layer and an insulating layer which are sequentially arranged outside the conductor.

Further, the fire-resistant layer adopts a calcined mica tape.

Furthermore, the insulating layer adopts a silicon rubber ceramic band.

Furthermore, the filling layer is filled with ceramic fireproof filling ropes.

Further, the oxygen-isolating layer is made of halogen-free low-smoke flame-retardant polyolefin.

Furthermore, the armor layer is armored by galvanized steel wires.

Further, the outer sheath is a ceramic silicon rubber sheath.

Furthermore, more than two insulated wire cores are stranded into a cable, and filling layers are filled in gaps among the insulated wire cores to enable the gaps to be round, so that the cabled cable core is formed.

Further, the flame-retardant and fire-resistant wrapping layer (5) is formed by wrapping a ceramic silicon rubber composite belt.

The scheme also provides a manufacturing method of the high-strength flexible fireproof and fire-resistant cable, which comprises the following steps:

1) and (3) producing an insulating wire core: wrapping at least one layer of calcined mica tape on the conductor, and then wrapping a ceramic silicon rubber tape to form an insulating wire core; 2) insulating sinle silk stranding, band are around package: the more than two insulated wire cores are stranded into a cable, gaps among the insulated wire cores are filled with ceramic fire-resistant filling ropes, and after the cable is formed, a ceramic silicon rubber composite belt is wrapped outside the cable, so that the wire cores are ensured to be round and the cable structure is stable; 3) production of the copper sheath: the welding corrugated copper sheath is adopted for production, so that the bending performance of the cable is improved; 4) extruding an oxygen-isolating layer: the outside of the copper sheath is extruded with a high-oxygen-index halogen-free low-smoke flame-retardant polyolefin oxygen-insulating layer; 5) armoring: steel wire armoring is carried out outside the oxygen isolation layer, and then a steel belt and a wrapping belt are reversely bound; 6) outer sheath: and extruding and wrapping the ceramic silicon rubber sheath to form a finished cable.

The invention has the beneficial effects that: the cable has the advantages of simple structure, less production procedures, higher-grade fireproof and fireproof performance, good bending performance, capability of bearing larger tension, compression resistance and external force impact, and capability of being produced in large scale, and the length of the production section can be determined according to the requirements of customers, and the performance of the cable meets the requirements of GB/T34926, GB/T19666, GB/T19216, GA 306.2 and IEC 60331. The cable is mainly applied to the application of cables in high-rise buildings (skyscrapers), and can resist the tension of long-distance laying under the condition of high vertical distance.

Drawings

Fig. 1 is a schematic structural diagram of a high-strength flexible fireproof cable according to the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, wherein the terms "upper", "lower", "left", "right", "inner", "outer", and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular manner, and thus should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in figure 1, the invention provides a high-strength flexible fireproof and fire-resistant cable which comprises a cabling cable core, wherein a flame-retardant and fire-resistant belting layer 5, a copper sheath 6, an oxygen barrier layer 7, an armor layer 8 and an outer sheath 9 are sequentially arranged outside the cabling cable core, the cabling cable core comprises at least one insulating cable core and a filling layer 4, and the insulating cable core comprises a conductor 1, and a fire-resistant layer 2 and an insulating layer 3 which are sequentially arranged outside the conductor 1. In this embodiment, the conductor 1 is a copper conductor, and the cabling cable core includes 4 insulation core, and 4 transposition cabling, the space between the insulation core is filled with filling layer 7 and is made its rounding, forms the cabling cable core.

In this embodiment, the fire-resistant layer 2 is made of a calcined mica tape. The calcined mica tape has the main characteristics of high heat resistance level which can reach the A-level fire resistance level (950-1000 ℃) besides the characteristics of natural mica, such as small expansion coefficient, large dielectric strength, high mica content, high resistivity and uniform dielectric constant.

In this embodiment, the insulating layer 3 is a silicon rubber ceramic tape. Under the condition that the cable is not burnt, the cable has good insulation and moisture resistance, and plays a role in heat insulation, fire prevention and fire resistance under the burning condition.

In this embodiment, the filling layer 4 is filled with a ceramic refractory filling rope. Besides the performance and compatibility of the ceramic silicon rubber belt, the material also avoids environmental pollution and harm to human body when adopting glass fiber ropes.

In this embodiment, the copper sheath 6 has high-temperature fireproof, fireproof and waterproof properties, is good in bending and flexibility, and also has the functions of shielding and bearing short-circuit current.

In this embodiment, the oxygen-barrier layer 7 is an extruded halogen-free low-smoke flame-retardant polyolefin oxygen-barrier layer. Can release moisture during the burning, the air can be kept apart to the water layer, plays the effect of cooling simultaneously to the charring crust reduces the inside transmission of heat, also plays the isolation layer effect simultaneously, causes the damage with copper sheath direct contact when having avoided the steel wire armor.

In this embodiment, the armor layer 8 is made of galvanized steel wire. The steel wire mainly has stronger tensile, compression and external impact forces, and plays the roles of tensile, compression and external impact resistance in the cable structure and in the important part. Also has higher temperature resistance and can bear short-circuit current. The galvanized steel wire is wrapped with reversely-rolled metal bands in a gap mode, and then the wrapped bands are overlapped, so that the metal wires are guaranteed not to be loose in the production process, and the production of the next procedure is guaranteed not to be influenced.

In this embodiment, the outer sheath 9 is a ceramic silicon rubber sheath. The ceramic silicon rubber has the characteristics of excellent fire resistance, flame retardance, low smoke, no toxicity and the like, residues after combustion are hard ceramic shells, hard shells are not melted and do not drip in a fire environment, and the line integrity test of heating for 90min and cooling for 15min can be carried out at the temperature of 950-1000 ℃ according to the specification in GB/T19216.

In this embodiment, the flame-retardant and fire-resistant wrapping layer 5 is formed by wrapping a ceramic silicon rubber composite belt.

1) and (3) producing an insulating wire core: and winding at least one layer of calcined mica tape on the conductor, and then winding a ceramic silicon rubber tape to form an insulating wire core.

2) Insulating sinle silk stranding, band are around package: more than two insulated wire cores are stranded into a cable, gaps among the insulated wire cores are filled with ceramic fire-resistant filling ropes, and after the cable is formed, the ceramic silicon rubber composite belt is wrapped externally, so that the wire cores are ensured to be round, and the cable structure is stable.

3) Production of the copper sheath: the welding corrugated copper sheath is adopted for production, and the bending performance of the cable is improved.

4) Extruding an oxygen-isolating layer: the outside of the copper sheath is extruded with a high-oxygen-index halogen-free low-smoke flame-retardant polyolefin oxygen-insulating layer.

5) Armoring: and steel wire armoring is carried out outside the oxygen isolation layer, and then a steel belt and a wrapping belt are reversely bound.

6) Outer sheath: and extruding and wrapping the ceramic silicon rubber sheath to form a finished cable.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a flexible fire prevention fire resisting cable of high strength, characterized by: the cable-laying cable comprises a cable-laying cable core, wherein a flame-retardant fire-resistant belting layer, a copper sheath, an oxygen-isolating layer, an armor layer and an outer sheath are sequentially arranged outside the cable-laying cable core, the cable-laying cable core comprises at least one insulating wire core and a filling layer, and the insulating wire core comprises a conductor and a fire-resistant layer and an insulating layer which are sequentially arranged outside the conductor.

2. A high strength flexible fire resistant cable as claimed in claim 1, wherein: the fire-resistant layer adopts a calcined mica tape.

3. A high strength flexible fire resistant cable as claimed in claim 1, wherein: the insulating layer adopts a silicon rubber ceramic band.

4. A high strength flexible fire resistant cable as claimed in claim 1, wherein: the filling layer is filled by ceramic fireproof filling ropes.

5. A high strength flexible fire resistant cable as claimed in claim 1, wherein: the oxygen isolation layer adopts a halogen-free low-smoke flame-retardant polyolefin oxygen isolation layer.

6. A high strength flexible fire resistant cable as claimed in claim 1, wherein: the armor layer is armored by zinc-plated steel wires.

7. A high strength flexible fire resistant cable as claimed in claim 1, wherein: the outer sheath is a ceramic silicon rubber sheath.

8. A high strength flexible fire resistant cable as claimed in claim 1, wherein: and more than two insulated wire cores are stranded into a cable, and a filling layer is filled in a gap between the insulated wire cores to round the gap so as to form the cabled cable core.

9. A high strength flexible fire resistant cable as claimed in claim 1, wherein: the flame-retardant and fire-resistant belting layer is formed by wrapping a ceramic silicon rubber composite belt.

10. A method for making a high strength flexible fire-resistant cable as claimed in claims 1 to 9, wherein: the method comprises the following steps:

1) and (3) producing an insulating wire core: wrapping at least one layer of calcined mica tape on the conductor, and then wrapping a ceramic silicon rubber tape to form an insulating wire core;

2) insulating sinle silk stranding, band are around package: the more than two insulated wire cores are stranded into a cable, gaps among the insulated wire cores are filled with ceramic fire-resistant filling ropes, and after the cable is formed, a ceramic silicon rubber composite belt is wrapped outside the cable, so that the wire cores are ensured to be round and the cable structure is stable;

3) production of the copper sheath: the welding corrugated copper sheath is adopted for production, so that the bending performance of the cable is improved;

4) extruding an oxygen-isolating layer: the outside of the copper sheath is extruded with a high-oxygen-index halogen-free low-smoke flame-retardant polyolefin oxygen-insulating layer;

5) armoring: steel wire armoring is carried out outside the oxygen isolation layer, and then a steel belt and a wrapping belt are reversely bound;