CN215118414U - Halogen-free low-smoke high-flame-retardant cable - Google Patents

Abstract

The utility model provides a there is not steamed low cigarette high flame retardant cable, including electrically conductive unit, electrically conductive unit includes predetermined quantity's inner core, the inner core is formed by the transposition of multicore cable sinle silk, the inner core intussuseption is filled with the yarn that blocks water, each all be provided with an insulating layer outside the inner core, electrically conductive unit is equipped with a back-fire relief layer, a insulating layer and an oversheath outward in proper order, the insulating layer includes that a high strength aluminium silk is woven the cover and is set up metal hydrate layer in the high strength aluminium silk is woven the cover, electrically conductive unit with constitute a filling layer between the back-fire relief layer, the filling layer the insulating layer is filled for metal hydrate to the filling layer. This there is not steamed low cigarette high flame retarded cable multilayer back-fire relief inoxidizing coating cooperation, the fire prevention fire resistance that improves the cable greatly, and fire-retardant level reaches B1 level, and cable flame stretchs highly low, the flame combustion time is short, the product cigarette is few, the flue gas is nontoxic, and the practicality is high, and cable strength, pull resistance, crushing resistance and bending resistance are good, longe-lived.

Description

Halogen-free low-smoke high-flame-retardant cable

Technical Field

The utility model relates to a wire and cable technical field especially relates to a there is not steamed low cigarette high flame retardant cable.

Background

With the rapid development of social economy in China, the use amount of cables is increased day by day, and the situations of fire disasters in large public entertainment places, chemical engineering places, coal mines, commercial buildings and other places are increased, so that disastrous losses are caused to lives and properties of people. At present, people have very profound understanding on fire control and fire prevention safety, the requirement on flame retardance of cables is increasingly improved, and high-flame-retardance cables are required to be adopted in places with dense population, such as subways, airports, high-rise buildings and the like, required by construction and fire departments.

The building fire is mostly caused by an electrical circuit, because wires and cables are often laid in bundles, heat radiation during combustion is conducted with each other, the fire is caused to spread, the existing cables are disconnected once the fire communication and the power circuit happen, a large amount of toxic gas is accompanied during combustion, dense smoke rolls, the toxic gas is sucked into a human body, suffocation occurs more easily, residents who escape from the fire also have contact danger, in addition, the existing cables are poor in flame spreading height, fire supply time, heat release, smoke toxicity and other performances, a series of problems not only influence the escape of residents and necessary property rescue, but also delay the valuable rescue time of fire fighters. Therefore, the requirements for power cables in new economic normals are higher and higher, and therefore, it is very necessary to develop a cable which is halogen-free, low-smoke, high-flame-retardant and excellent in performance.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a halogen-free low-smoke high-flame-retardant cable.

In order to achieve the above object, the utility model provides a pair of there is not steamed low cigarette high flame retardant cable, including electrically conductive unit, electrically conductive unit includes predetermined quantity's inner core, the inner core is formed by the transposition of multicore cable core, the inner core intussuseption is filled with the yarn that blocks water, each the inner core all is provided with an insulating layer outward, electrically conductive unit is equipped with a back-fire relief layer, a insulating layer and an oversheath outward in proper order, the insulating layer includes that a high strength aluminium silk is woven the cover and is set up metal hydrate layer in the high strength aluminium silk is woven the cover, electrically conductive unit with constitute a filling layer between the back-fire relief layer, the filling layer is metal hydrate and fills the insulating layer.

Further preferably, a water-resistant layer is arranged outside the insulating layer.

Further preferably, the insulating layer is a thermoplastic low-smoke halogen-free flame-retardant polyolefin insulating layer, and the outer sheath is a thermoplastic low-smoke halogen-free flame-retardant polyolefin sheath.

Further preferably, the fire retardant layer is a ceramic silicon rubber fire retardant layer.

Further preferably, an armor layer is arranged outside the outer sheath.

Further preferably, a fireproof paint layer is arranged outside the armor layer.

The utility model has the advantages that: the utility model provides a there is not steamed low cigarette high flame retardant cable, through setting up by the outer sheath of thermoplasticity low cigarette halogen-free fire retardant polyolefin material and setting up and constitute elementary back-fire relief inoxidizing coating with the fireproof paint layer, set up by high strength aluminium silk braid cover and set up the metal hydrate layer in the high strength aluminium silk braid cover and make the insulating layer be second grade back-fire relief inoxidizing coating, set up by the silicon rubber material of pottery and make the back-fire relief layer be third grade back-fire relief inoxidizing coating, and set up the filling layer is back-fire relief level four inoxidizing coating, the multilayer cooperation improves the fire resistance and fire retardance of cable greatly, fire resistance level reaches B1 level, cable flame spreads highly low, the flame combustion time is short, and the product cigarette is few, the flue gas is nontoxic, the danger that comes from the air except the oxygen deficiency problem that should burn and cause during the conflagration, can not have the problem that produces toxic gas because of cable burning, the cable is favorable for self rescue and rescue work, has good flame retardant property, is not easy to burn in fire environment, can ensure the electric conduction and transmission performance of the cable for a long time, is very favorable for self rescue, help seeking and rescue work, and can effectively reduce casualties and property loss.

The braided sleeve device formed by the high-strength aluminum wires increases the strength, the tensile property, the compressive resistance and the bending resistance of the cable, and further prolongs the service life of the cable.

The inner core intussuseption blocks water the yarn and the setting up of water blocking layer makes the water-proof effects of cable better, can avoid causing the cable core to take place the short circuit, burn out, the phenomenon of catching fire because of moisture infiltration cable is inside, makes the cable life-span subtract the weak point or take place accident.

Drawings

Fig. 1 is a schematic structural diagram provided in the first embodiment of the present invention.

Detailed Description

The embodiments described below are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

Referring to fig. 1, the halogen-free low-smoke high-flame-retardant cable that this embodiment provided, including conductive unit, conductive unit includes predetermined quantity of inner core 1, inner core 1 is formed by the transposition of multicore cable sinle silk, the intussuseption of inner core 1 is filled with the yarn 2 that blocks water, each inner core 1 all is provided with an insulating layer 3 outward, insulating layer 3 adopts the yarn that blocks water outward to form a water blocking layer 4 around the package. The water-blocking yarn is high in water absorption multiplying power, rapidly expands when meeting water, fills gaps between cable cores, is good in longitudinal water-blocking effect, has good tensile strength and thermal stability, is not influenced by a high-temperature environment, is uniform and firm in combination of the high-multiplying-power water-absorbing material and the base material, does not have the problems of coating peeling and layering, and is stable in technical performance and high in practicability. Pack in the inner core 1 and block water yarn 2 and the setting up of water blocking layer 4 makes the water-proof effects of cable better, can avoid causing the cable core to take place the phenomenon of short circuit, burn out, catching fire because of moisture infiltration cable is inside, makes the cable life-span reduce or take place accident.

A fire retardant layer 6, a heat insulation layer 7 and an outer sheath 8 are sequentially arranged outside the conductive unit. The fire retardant layer 6 is made of ceramic silicon rubber material, the ceramic silicon rubber material is soft and elastic at normal temperature, is sintered into a hard ceramic shell in flame at the temperature of 750 plus 800 ℃ or above in a short time, can persist for ablation for more than one hour, protects the cable from being damaged for a long time, can bear certain water spraying and vibration with certain strength, and ensures the integrity of the line.

The heat insulation layer 7 is a mixed heat insulation layer composed of metal hydrate composed of aluminum hydroxide and magnesium hydroxide and high-strength aluminum wires, the high-strength aluminum wires are woven into a high-strength aluminum wire woven sleeve, and the metal hydrate is filled in the high-strength aluminum wire woven sleeve to form a metal hydration layer. The magnesium hydroxide, the aluminum hydroxide and other metal hydrates can release crystal water when the cable is burnt, and the temperature of the flame of the cable is reduced, so that the heat caused by continuous burning of the flame is prevented, the spreading height of the flame can be ensured, the smoke yield and the burning speed can be reduced, and the fire hazard is reduced. The high-strength aluminum wire can absorb a large amount of heat energy (the melting temperature of aluminum is 660 ℃, the melting heat reaches 11670J/mol) during high-temperature oxidation, and a barrier formed by aluminum oxide heat is generated, and the barrier is matched with a metal hydrate secondary filled in the woven sleeve to form a complete heat-insulation fireproof flame-retardant barrier, so that the heat-insulation effect is obvious, and the impact of a fire source can be slowed down. The braided sleeve device formed by the high-strength aluminum wires increases the strength, the tensile property, the compressive resistance and the bending resistance of the cable.

A filling layer 5 is formed between the conductive unit and the fire retardant layer 6, the filling layer 5 is a metal hydrate filling heat insulation layer, and a metal hydrate II consisting of aluminum hydroxide, magnesium hydroxide and a binder is filled in the filling layer.

The insulating layer is the fire-retardant polyolefin insulating layer of thermoplasticity low smoke and zero halogen, the oversheath is the fire-retardant polyolefin sheath of thermoplasticity low smoke and zero halogen, insulating layer 3 reaches oversheath 8 is made by the fire-retardant polyolefin material of thermoplasticity low smoke and zero halogen, has good creep resistance, insulating nature and heat resistance, can make the conducting element maintain normal work by initial stage fire prevention effect and effective protection conducting element under the fire environment, and the burning of the fire-retardant polyolefin material of thermoplasticity low smoke and zero halogen is the halogen gas that does not produce the harm, does not produce corrosive gas, the burning is calorific capacity few, can not sparse to the personnel, flee and human healthy production influences.

Preferably, an armor layer can be arranged outside the outer sheath 8 to increase the mechanical strength of the cable, improve the anti-corrosion capability, solve the problem that the cable is damaged by mechanical damage and corrosion, and prolong the service life of the cable.

Preferably, a fireproof paint layer 10 can be further arranged outside the armor layer 9, so that the fireproof performance of the cable is improved.

The halogen-free low-smoke high-flame-retardant cable that this embodiment provided, make by thermoplastic low-smoke halogen-free flame retardant polyolefin material through the setting oversheath 8 and setting are in the outer armor 9 of oversheath and fireproof paint layer 10 constitute elementary back-fire relief inoxidizing coating, set up and make by metal hydrate one that aluminium hydroxide, magnesium hydrate are constituteed and high strength aluminium silk the insulating layer 7 is second grade back-fire relief inoxidizing coating, sets up and is made by ceramic silicon rubber material back-fire relief layer 6 is tertiary back-fire relief inoxidizing coating, and sets up filling layer 5 is back-fire relief level inoxidizing coating, and the multilayer cooperation improves the fire resistance of cable greatly, and fire resistance reaches B1 level, and cable flame spreads highly low, and flame burning time is short, and produces cigarette less, the flue gas is nontoxic, and the danger that comes from the air during the conflagration except the oxygen deficiency problem that should burn and cause, can not have the problem because of cable burning production toxic gas, the cable is favorable for self rescue and rescue work, has good flame retardant property, is not easy to burn in fire environment, can ensure the electric conduction and transmission performance of the cable for a long time, is very favorable for self rescue, help seeking and rescue work, and can effectively reduce casualties and property loss.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the invention, which is defined by the appended claims.

Claims (6)

1. The utility model provides a there is not steamed low cigarette high flame retardant cable, includes electrically conductive unit, electrically conductive unit includes predetermined quantity's inner core, the inner core is formed by the transposition of multicore cable sinle silk, its characterized in that, the inner core intussuseption is filled with the yarn that blocks water, each all be provided with an insulating layer outside the inner core, electrically conductive unit is equipped with a back-fire relief layer, a insulating layer and an oversheath outward in proper order, the insulating layer includes that a high strength aluminium silk is woven the cover and is set up metal hydrate layer in the high strength aluminium silk is woven the cover, electrically conductive unit with constitute a filling layer between the back-fire relief layer, the filling layer fills the insulating layer for metal hydrate.

2. The halogen-free low-smoke high-flame-retardant cable according to claim 1, wherein a water-resistant layer is arranged outside the insulating layer.

3. The halogen-free low-smoke high-flame-retardant cable according to claim 1, wherein the insulating layer is a thermoplastic low-smoke halogen-free flame-retardant polyolefin insulating layer, and the outer sheath is a thermoplastic low-smoke halogen-free flame-retardant polyolefin sheath.

4. The halogen-free, low-smoke, high-flame-retardant cable according to claim 1, wherein the flame retardant layer is a ceramic silicone rubber flame retardant layer.

5. The halogen-free low-smoke high-flame-retardant cable according to any one of claims 1 to 4, wherein an armor layer is arranged outside the outer sheath.

6. The halogen-free low-smoke high-flame-retardant cable according to claim 5, wherein a fireproof paint layer is arranged outside the armor layer.

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