CN217035231U - Environment-friendly halogen-free low-smoke flame-retardant fire-resistant control cable - Google Patents

Abstract

The utility model provides an environment-friendly halogen-free low-smoke flame-retardant fire-resistant control cable, which belongs to the technical field of cables and comprises an environment-friendly flame-retardant composite layer, wherein the environment-friendly flame-retardant composite layer comprises a first metal mesh shielding layer and a second metal mesh shielding layer, the second metal mesh shielding layer is positioned in the first metal mesh shielding layer, the first metal mesh shielding layer and the second metal mesh shielding layer share the same central axis, a plurality of halogen-free flame retardant capsules and high-temperature-resistant compression-resistant particles at gaps between the halogen-free flame retardant capsules are arranged between the first metal mesh shielding layer and the second metal mesh shielding layer, a halogen-free low-smoke fire-resistant outer sleeve is arranged on the outer wall of the first metal mesh shielding layer, and a heat-insulating protective layer is arranged on the inner wall of the second metal mesh shielding layer. The power line and the optical fiber inside are protected, and the optical fiber can still be normally used under the condition of local damage.

Description

Environment-friendly halogen-free low-smoke flame-retardant fire-resistant control cable

Technical Field

The utility model mainly relates to the technical field of cables, in particular to an environment-friendly halogen-free low-smoke flame-retardant fire-resistant control cable.

Background

The cable is generally formed by twisting several or several groups of wires (at least two in each group), is similar to a rope, wherein each group of wires are mutually insulated and are usually twisted around a center, the whole outer surface is wrapped with a highly-insulated covering layer, the cable has the characteristics of internal electrification and external insulation, and the cable comprises a power cable, a control cable, a compensation cable, a shielding cable, a high-temperature cable, a computer cable, a signal cable, a coaxial cable, a fire-resistant cable, a marine cable, a mining cable, an aluminum alloy cable and the like, wherein the environment-friendly low-smoke halogen-free flame-retardant fire-resistant control cable is one of the common control cables.

In present current control cable, for example, the technical structure of application number CN201620804344.2 application document in, this cable includes single-core or many sinle silks, inner liner and the fire-retardant elastomer restrictive coating of halogen-free low smoke, crowded package inner liner outside the sinle silks, crowded package halogen-free low smoke fire-retardant elastomer sheath outside the inner liner, sinle silks and sinle silks between and fill the cable core between sinle silks and the inner liner, the sinle silks be copper conductor, crowded package halogen-free low smoke fire-retardant elastomer insulating layer outside the sinle silks, this cable has realized nevertheless to the fire-retardant of naked light, in case fire-retardant layer is burnt out the damage, just can't further prevent the naked light to expand on the cable to damage the cable core, to the fire-retardant ability of flame is more weak, and protection intensity is lower.

SUMMERY OF THE UTILITY MODEL

The utility model mainly provides an environment-friendly halogen-free low-smoke flame-retardant fire-resistant control cable, which is used for solving the technical problems in the background technology.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides an environment-friendly does not have steamed low fire-retardant fire-resistant control cable of cigarette, includes the fire-retardant composite bed of environment-friendly, the fire-retardant composite bed of environment-friendly includes first metal mesh shielding layer and second metal mesh shielding layer, and second metal mesh shielding layer is located inside first metal mesh shielding layer, the same axis in both, be provided with a plurality of halogen-free flame retardant capsule between first metal mesh shielding layer and the second metal mesh shielding layer to and the high temperature resistant resistance to compression granule of space department between every halogen-free flame retardant capsule, the outer wall of first metal mesh shielding layer is provided with steamed low fire-resistant overcoat of cigarette, and the thickness of steamed low fire-resistant overcoat of cigarette is greater than the thickness of first metal mesh shielding layer, be provided with on the inner wall of second metal mesh shielding layer and separate the temperature inoxidizing coating, the thickness that separates the temperature inoxidizing coating is greater than second metal mesh shielding layer.

Preferably, the first metal mesh shielding layer and the second metal mesh shielding layer have the same thickness, and the mesh size on the first metal mesh shielding layer and the second metal mesh shielding layer is smaller than the size of the high-temperature-resistant and pressure-resistant particles.

Preferably, a ceramic silicon rubber sleeve is arranged in the heat insulation protective layer.

Preferably, a main center reinforcing part is arranged in the ceramic silicone rubber sleeve, four flame-retardant and fire-resistant soft sleeves are arranged around the main center reinforcing part, and an auxiliary center reinforcing part is arranged in each flame-retardant and fire-resistant soft sleeve.

Preferably, each secondary central reinforcing member is provided with two loose tubes and two power lines around the circumference thereof, and a plurality of optical fibers in each loose tube.

Preferably, the ceramic silicone rubber sleeve is internally provided with a buffer filler, and the buffer filler wraps the main central reinforcing piece and the outer wall of each flame-retardant and fire-resistant soft sleeve.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model realizes blocking of the fire of the open fire after the open fire damages the halogen-free low-smoke fire-resistant jacket through the environment-friendly flame-retardant composite layer, effectively avoids further expansion of the fire on the cable, protects the power line and the optical fiber inside, can still be normally used under the condition of local damage, has low material cost, is easy to produce and has certain market competitiveness and practical value, and has the following specific operations that whether each part of the cable is damaged or not is checked firstly, the cable can be installed on equipment for use after the damage-free condition is ensured, when the accidental fire happens, the halogen-free low-smoke fire-resistant jacket is burnt by the open fire, so that part of the halogen-free flame retardant capsules are exposed, and the halogen-free flame retardant capsules can be burnt through the first metal mesh shielding layer along with the gradual increase of the fire of the open fire, so that the halogen-free flame retardant in the halogen-free flame retardant capsules can be released, prevent further expansion of intensity of a fire, guaranteed that intraductal optic fibre of pottery silicone rubber sleeve and power cord do not receive the damage, in the staff in time extinguish flame after, the cable still can normal use, through pottery silicone rubber sleeve pipe, the protection to inside power cord and optic fibre has been realized, and pottery silicone rubber has splendid fire prevention, it is fire-retardant, low smoke, nontoxic, characteristics such as environmental protection, extrusion moulding simple process, its residue is hard pottery casing after burning, the crust does not melt and does not drip in the fire hazard environment, be applicable to any place that needs the fire prevention, played firm protection in guaranteeing that the electric power transmission is unobstructed under the conflagration condition and done.

The present invention will be explained in detail below with reference to the drawings and specific embodiments.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional structural view of a cable of the present invention;

FIG. 3 is a schematic cross-sectional view of the flame retardant composite layer of the present invention;

FIG. 4 is a schematic cross-sectional view of the internal structure of the flame-retardant and fire-resistant flexible sheath of the present invention.

In the figure: 1. an environment-friendly flame-retardant composite layer; 11. a first metal mesh shielding layer; 12. a second metal mesh shielding layer; 13. a halogen-free flame retardant capsule; 14. high temperature resistant and pressure resistant particles; 15. a halogen-free low-smoke fire-resistant jacket; 16. a thermal insulation protective layer; 2. a primary central stiffener; 3. a flame-retardant and fire-resistant soft sleeve; 31. a secondary central stiffener; 32. loosening the sleeve; 321. an optical fiber; 33. a power line; 4. a ceramic silicon rubber sleeve; 41. a buffer filler.

Detailed Description

In order to facilitate an understanding of the utility model, the utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the utility model are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the utility model.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the knowledge of the terms used herein in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-4, an environment-friendly halogen-free low-smoke flame-retardant fire-resistant control cable comprises an environment-friendly flame-retardant composite layer 1, the environment-friendly flame-retardant composite layer 1 comprises a first metal mesh shielding layer 11 and a second metal mesh shielding layer 12, and the second metal mesh shielding layer 12 is positioned inside the first metal mesh shielding layer 11, and the two have the same central axis, a plurality of halogen-free flame retardant capsules 13 are arranged between the first metal mesh shielding layer 11 and the second metal mesh shielding layer 12, and high temperature resistant and pressure resistant particles 14 in the gaps between the halogen-free flame retardant capsules 13, a halogen-free low-smoke fire-resistant outer sleeve 15 is arranged on the outer wall of the first metal mesh shielding layer 11, and the thickness of the halogen-free low-smoke fire-resistant outer sleeve 15 is greater than that of the first metal mesh shielding layer 11, a heat insulation protective layer 16 is arranged on the inner wall of the second metal mesh shielding layer 12, and the thickness of the heat insulation protective layer 16 is greater than that of the second metal mesh shielding layer 12.

The structure realizes blocking of the fire behavior of the open fire after the open fire damages the halogen-free low-smoke fire-resistant outer sleeve 15 through the environment-friendly flame-retardant composite layer 1, effectively avoids further expansion of the fire behavior on the cable, protects the power line 33 and the optical fiber 321 inside, can be normally used under the condition of local damage, and has the advantages of low material cost, easy production, certain market competitiveness and practical value;

the specific operation is as follows, whether each part of the whole cable is damaged is checked firstly, after the condition that no damage exists is ensured, the cable can be installed on equipment for use, when the accidental fire catching condition occurs, the halogen-free low-smoke fire-resistant outer sleeve 15 is burnt by open fire, part of the halogen-free flame retardant capsules 13 are exposed, the halogen-free flame retardant capsules 13 can be burnt through the first metal mesh shielding layer 11 along with the gradual increase of the fire of the open fire, the halogen-free flame retardant in the halogen-free flame retardant capsules 13 is released, the further expansion of the fire is prevented, the optical fibers 321 and the power lines 33 in the ceramic silicon rubber sleeve 4 are ensured not to be damaged, and after the flame is extinguished by working personnel in time, the cable can be used normally.

Please refer to fig. 2 and fig. 3, the thicknesses of the first metal mesh shielding layer 11 and the second metal mesh shielding layer 12 are the same, and the sizes of the meshes of the first metal mesh shielding layer 11 and the second metal mesh shielding layer 12 are smaller than the size of the high temperature and pressure resistant particles 14, the first metal mesh shielding layer 11 and the second metal mesh shielding layer 12 shield the external electromagnetic waves, so that the inside is not interfered by the external electromagnetic waves, the internal electromagnetic energy is not easy to go outside, and the high temperature and pressure resistant particles 14 are restrained, so that the high temperature and pressure resistant particles 14 are prevented from scattering out after the halogen-free low smoke fire-resistant casing 15 is damaged, the halogen-free fire retardant capsule 13 is conveniently released after being damaged, the fire potential is prevented from expanding, the ceramic silicon rubber sleeve 4 is arranged in the thermal insulation protective layer 16, the internal power line 33 and the optical fiber 321 are protected by the ceramic silicon rubber sleeve 4, the ceramic silicon rubber has the characteristics of excellent fire resistance, flame retardance, low smoke, no toxicity, environmental protection and the like, the extrusion molding process is simple, residues after combustion are hard ceramic shells, and hard shells are not melted and dropped in a fire environment, so that the ceramic silicon rubber is suitable for any places needing fire prevention, and plays a role in firm protection in ensuring smooth power transmission under the condition of fire.

Please refer to fig. 2 and fig. 4, a main central reinforcement 2 is disposed in the ceramic silicone rubber sleeve 4, four flame-retardant fire-resistant soft sleeves 3 are disposed around the main central reinforcement 2, a secondary central reinforcement 31 is disposed in each of the flame-retardant fire-resistant soft sleeves 3, the overall resistance and toughness of the cable are improved by the cooperation between the main central reinforcement 2 and the secondary central reinforcement 31, the probability of damage during installation, transportation and pulling is reduced, two loose sleeves 32 and two power lines 33 are disposed around each of the secondary central reinforcements 31, and a plurality of optical fibers 321 are disposed in each of the loose sleeves 32, the transmission of electric energy and information is realized by the power lines 33 and the optical fibers 321, a buffer filler 41 is disposed in the ceramic silicone rubber sleeve 4, and the buffer filler 41 wraps the main central reinforcement 2 and the outer wall of each of the flame-retardant fire-resistant soft sleeve 3, through buffering filler 41, realized the buffering to the strong effort of external world, protected the inside power cord 33 and the optic fibre 321 of fire-retardant fire-resistant soft cover 3 to possess the effect to fire-retardant fire-resistant soft cover 3 location, reduce the condition that twists reverse intertwine to appear.

The utility model is described above with reference to the accompanying drawings, it is obvious that the utility model is not limited to the above-described embodiments, and it is within the scope of the utility model to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.

Claims (6)

1. The environment-friendly halogen-free low-smoke flame-retardant fire-resistant control cable comprises an environment-friendly flame-retardant composite layer (1) and is characterized in that the environment-friendly flame-retardant composite layer (1) comprises a first metal mesh shielding layer (11) and a second metal mesh shielding layer (12), the second metal mesh shielding layer (12) is positioned inside the first metal mesh shielding layer (11), the first metal mesh shielding layer (11) and the second metal mesh shielding layer (12) are respectively provided with a plurality of halogen-free flame retardant capsules (13) and high-temperature-resistant and pressure-resistant particles (14) at gaps between every two halogen-free flame retardant capsules (13), the outer wall of the first metal mesh shielding layer (11) is provided with a halogen-free low-smoke fire-resistant outer sleeve (15), the thickness of the halogen-free low-smoke fire-resistant outer sleeve (15) is larger than that of the first metal mesh shielding layer (11), and a heat-insulating protective layer (16) is arranged on the inner wall of the second metal mesh shielding layer (12), the thickness of the heat insulation protective layer (16) is larger than that of the second metal mesh shielding layer (12).

2. The environment-friendly halogen-free low-smoke flame-retardant fire-resistant control cable according to claim 1, wherein the thicknesses of the first metal mesh shielding layer (11) and the second metal mesh shielding layer (12) are the same, and the mesh sizes on the first metal mesh shielding layer (11) and the second metal mesh shielding layer (12) are smaller than the sizes of the high-temperature-resistant and pressure-resistant particles (14).

3. The environment-friendly halogen-free low-smoke flame-retardant fire-resistant control cable according to claim 1, wherein a ceramic silicone rubber sleeve (4) is arranged in the thermal insulation protective layer (16).

4. The environment-friendly halogen-free low-smoke flame-retardant fire-resistant control cable according to claim 3, wherein a main central reinforcement (2) is arranged in the ceramic silicon rubber sleeve (4), four flame-retardant fire-resistant soft sleeves (3) are arranged around the main central reinforcement (2), and an auxiliary central reinforcement (31) is arranged in each flame-retardant fire-resistant soft sleeve (3).

5. The environment-friendly halogen-free low-smoke flame-retardant fire-resistant control cable according to claim 4, wherein two loose tubes (32) and two power lines (33) are arranged around each secondary central stiffener (31), and a plurality of optical fibers (321) are arranged in each loose tube (32).

6. The environment-friendly halogen-free low-smoke flame-retardant fire-resistant control cable according to claim 4, wherein the ceramic silicone rubber sleeve (4) is internally provided with a buffer filler (41), and the buffer filler (41) wraps the main central reinforcement (2) and the outer wall of each flame-retardant fire-resistant soft sleeve (3).

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