CN220171834U - Composite flame-retardant cable - Google Patents

Abstract

The utility model relates to the technical field of cables, in particular to a composite flame-retardant cable, which comprises a plurality of embedded cables, wherein the outer walls of the plurality of embedded cables are provided with a filling layer, the filling layer is used for fixing the embedded cables in the filling layer, a first nonmetal reinforcing core and a plurality of second nonmetal reinforcing cores are arranged in the filling layer, and the first nonmetal reinforcing core is positioned in the center of the filling layer.

Description

Composite flame-retardant cable

Technical Field

The utility model relates to a flame-retardant cable, in particular to a composite flame-retardant cable, and belongs to the technical field of cables.

Background

The flame-retardant cable is widely applied to the fields of construction, traffic, electric power, petrochemical industry, metallurgy, aerospace and the like, is particularly suitable for places requiring high safety and fireproof performance, such as high-rise buildings, subways, tunnels, petrochemical plants and the like, because the cable used in daily life generates toxic gas when a fire disaster occurs, the cable has a certain harm to human bodies, and the common cable also emits dark smoke when the fire disaster occurs, which greatly hinders rescue actions when the fire disaster occurs, the flame-retardant cable is required to have flame-retardant effect when facing open fire, and can reduce the release of the smoke and the toxic gas, and reduce the difficulty of rescue, but the flame-retardant cable commonly seen in the market has better flame-retardant effect, and a large amount of flame retardant is added in the material, so that the integral mechanical performance of the flame-retardant cable is reduced, the tensile capability is poor, the flame-retardant cable is required to move after a period of time, and the cable is easy to cause the inner section and break when the cable is pulled, and the condition of circuit short circuit and power failure occurs.

Accordingly, there is a need for improvements in composite flame retardant cables to address the above-described problems.

Disclosure of Invention

The utility model aims to provide a composite flame-retardant cable, wherein a polyvinyl chloride protective layer can protect a filling layer and an embedded cable from being extruded by the outside, meanwhile, zinc borate and MoO3 which can reduce the smoke quantity are added into a polyvinyl chloride material of the polyvinyl chloride protective layer to improve the flame retardance, a polyolefin flame-retardant layer on the outermost layer can decompose carbon dioxide and water when being burnt by fire, no obvious smoke and harmful gas are generated, a first nonmetal reinforcing core and a second nonmetal reinforcing core arranged in the filling layer have high strength and rigidity, the external pressure and the external tension can be effectively resisted, the mechanical property inside the cable is improved, and the service life of the cable is prolonged.

In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises the following steps:

including a plurality of embedded cables, a plurality of embedded cable outer walls are equipped with the filling layer, the filling layer will embedded cable is fixed in its inside, the inside of filling layer is equipped with first nonmetal and strengthens core and a plurality of second nonmetal and strengthen the core, first nonmetal strengthens the core and is located the filling layer center, a plurality of second nonmetal strengthens the core and is located respectively between two adjacent embedded cables, the filling layer outside is equipped with the polyvinyl chloride protective layer, the outer wall cover of polyvinyl chloride protective layer is equipped with the fire-retardant layer of polyolefin.

Preferably, the embedded cable comprises a conductor and a plurality of insulating layers, and the insulating layers are sleeved on the outer wall of the conductor.

Preferably, the outer wall of the filling layer is sleeved with a moisture-proof layer.

Preferably, the outer wall of the moisture-proof layer is sleeved with a copper mesh shielding layer.

Preferably, the copper mesh shielding layer is sleeved with a joint armor layer on the outer wall.

Preferably, the outer wall of the combined armor layer is sleeved with an ethylene propylene rubber isolation layer.

The utility model has at least the following beneficial effects:

1. the polyvinyl chloride protective layer adopts that zinc borate and MoO3 are added in the polyvinyl chloride, so that the HCL release amount and the smoke generation amount of the polyvinyl chloride can be reduced, the flame retardance of the polyvinyl chloride is improved, carbon dioxide and water are decomposed out of the polyolefin flame-retardant layer during combustion, obvious smoke and harmful gas are not generated, the first nonmetal reinforcing core and the second nonmetal reinforcing core arranged in the filling layer can improve the mechanical property of the cable, the cable can bear repeated pulling in laying, and the service life of the cable is prolonged.

2. The ethylene propylene rubber isolation layer arranged on the outer wall of the combined armor layer has excellent electrical performance, high insulation resistance and small dielectric loss, and can better protect the inside of the cable and achieve the insulation effect.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a schematic cross-sectional view of the present utility model;

fig. 2 is a schematic diagram of an enlarged structure of an embedded cable 1 according to the present utility model;

in the figure, 1, an embedded cable; 2. a polyvinyl chloride protective layer; 3. a polyolefin flame retardant layer; 4. a filling layer; 5. a first non-metallic reinforcing core; 6. a second non-metallic reinforcing core; 7. a conductor; 8. an insulating layer; 9. a moisture barrier; 10. a copper mesh shielding layer; 11. a joint armor layer; 12. an ethylene propylene rubber isolation layer.

Detailed Description

The following detailed description of embodiments of the present utility model will be given with reference to the accompanying drawings and examples, by which the implementation process of how the present utility model can be applied to solve the technical problems and achieve the technical effects can be fully understood and implemented.

As shown in fig. 1-2, the composite flame-retardant cable provided in this embodiment includes a plurality of embedded cables 1, each embedded cable 1 includes a conductor 7 and an insulating layer 8, the insulating layer 8 is sleeved on the outer wall of the conductor 7, the insulating layer 8 is made of polyethylene material, has good insulating property and high temperature resistance, and can protect the conductor 7, the outer wall of each embedded cable 1 is provided with a filling layer 4, the filling layer 4 is made of polyolefin as a main material, a certain amount of plasticizer and flame retardant are added, the composite flame-retardant cable is formed by foaming, plasticizing and extrusion, the mechanical strength and the compression resistance of the cable are improved, the filling layer 4 fixes the plurality of embedded cables 1 inside the composite flame-retardant cable, the embedded cables 1 cannot shake, a first nonmetal reinforcing core 5 and a plurality of second nonmetal reinforcing cores 6 are arranged inside the filling layer 4, the first nonmetal reinforcing core 5 is positioned at the center of the filling layer 4, the plurality of second nonmetal reinforcing cores 6 are respectively positioned between two adjacent embedded cables 1, the first nonmetal reinforcing cores 5 and the second nonmetal reinforcing cores 6 are made of glass fiber, carbon fiber, polyester fiber and other materials, have high strength and rigidity, can effectively resist external pressure and tension, and has the effects of enhancing the overall strength of the cable, improving the overall mechanical property and service life of the cable and improving the safety of the cable, the outer wall of the filling layer 4 is sleeved with a moisture-proof layer 9, the moisture-proof layer 9 is used for preventing moisture, humidity and other liquid from entering the inside of the filling layer 4, thereby protecting the embedded cables 1, the outer wall of the moisture-proof layer 9 is sleeved with a copper mesh shielding layer 10, the copper mesh shielding layer 10 adopts copper mesh material as the copper mesh shielding layer 10 for shielding electromagnetic interference and improving the anti-interference capability of the cables, the outer wall of the copper mesh shielding layer 10 is sleeved with a combined armor layer 11, the main function is to protect the inner copper mesh shielding layer 10, the insulating layer 8 and the filling layer 4 from damage, and to prevent the cable from being scratched or squeezed to cause short circuit or electric leakage.

Further, as shown in fig. 1 and fig. 2, the outer wall of the joint armor layer 11 is sleeved with the ethylene propylene rubber isolation layer 12, the ethylene propylene rubber isolation layer 12 is made of ethylene propylene rubber, has good insulativity and high resistance, and an inorganic flame retardant filler is added into the ethylene propylene rubber to increase oxygen index, so that a flame retardant effect is achieved, a polyvinyl chloride protection layer 2 is arranged outside the filling layer 4, the outer wall of the ethylene propylene rubber isolation layer 12 is fixedly connected with the inner wall of the polyvinyl chloride protection layer 2, zinc borate and MoO3 are added into polyvinyl chloride to reduce the HCL release amount and fuming amount of the polyvinyl chloride, the flame retardance of the polyvinyl chloride is improved, the outer wall of the polyvinyl chloride protection layer 2 is sleeved with the polyolefin flame retardant layer 3, the polyolefin flame retardant layer 3 is made of hydrocarbon, carbon dioxide and water can be decomposed when the flame retardant layer 3 burns when meeting fire, and obvious smoke and harmful gas are not generated, and the inorganic flame retardant and phosphorus flame retardant are added to improve the flame retardance of the polyolefin flame retardant layer 3.

As shown in fig. 1-2, the principle of the composite flame-retardant cable provided in this embodiment is as follows: the current can normally flow through the conductor 7, outer insulating layer 8 can be better insulate a plurality of conductors 7, make the normal circular telegram of a plurality of conductors 7, the filling layer 4 is to the space of embedded cable 1, it is fixed with embedded cable 1, can not rock, dampproof course 9 is the material that prevents moisture, moisture and other liquid entering cable inside, the embedded cable 1 of protection inside, prevent to wet and lead to the short circuit power failure, first nonmetal enhancement core 5 and second nonmetal enhancement core 6 can effectual reinforcing cable holistic intensity, resist outside pressure and pulling force effectively, copper mesh shielding layer 10 can shield electromagnetic interference, make the interference killing feature of cable improve, the copper mesh shielding layer 10 that unite armor layer 11 is used for protecting inside, dampproof course 9, filling layer 4 and embedded cable 1 do not receive the damage, prevent short circuit or electric leakage, the insulating properties that the ethylene propylene rubber isolation layer 12 adopts is good, the material that resistance is high, can also play insulating effect when protecting cable inside, the polyvinyl chloride protection layer 2 adopts the material to add can reduce polyolefin harmful quantity, and still have the fire-retardant effect that can also reduce the fire-retardant quality of flame retardant layer and smoke and reduce when meeting fire, and smoke and fire and reduce when having fire resistance and smoke and fire 3 and reduce and fire and smoke and fire resistance and have obvious effect when meeting fire and smoke and fire resistance and producing 3.

Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, substantially achieving the technical effect.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude that an additional identical element is present in a commodity or system comprising the element.

While the foregoing description illustrates and describes the preferred embodiments of the present utility model, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as described herein, either as a result of the foregoing teachings or as a result of the knowledge or technology in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.

Claims (6)

1. A composite flame retardant cable comprising a plurality of embedded cables (1), characterized in that: the utility model provides a plurality of embedded cable (1) outer walls are equipped with filling layer (4), filling layer (4) are a plurality of embedded cable (1) are fixed in its inside, the inside of filling layer (4) is equipped with first nonmetal and strengthens core (5) and a plurality of second nonmetal and strengthen core (6), first nonmetal strengthens core (5) and is located filling layer (4) center, a plurality of second nonmetal strengthens core (6) and is located two adjacent respectively between embedded cable (1), filling layer (4) outside is equipped with polyvinyl chloride protective layer (2), polyvinyl chloride protective layer (2) outer wall cover is equipped with polyolefin flame retardant coating (3).

2. A composite flame retardant cable according to claim 1, wherein: the embedded cable (1) comprises a conductor (7) and an insulating layer (8), wherein the insulating layer (8) is sleeved on the outer wall of the conductor (7).

3. A composite flame retardant cable according to claim 1, wherein: the outer wall of the filling layer (4) is sleeved with a moisture-proof layer (9).

4. A composite flame retardant cable according to claim 3, wherein: the outer wall of the moisture-proof layer (9) is sleeved with a copper screen shielding layer (10).

5. A composite flame retardant cable as claimed in claim 4, wherein: the outer wall of the copper mesh shielding layer (10) is sleeved with a joint armor layer (11).

6. A composite flame retardant cable as claimed in claim 5, wherein: the outer wall of the combined armor layer (11) is sleeved with an ethylene propylene rubber isolation layer (12), and the outer wall of the ethylene propylene rubber isolation layer (12) is fixedly connected with the inner wall of the polyvinyl chloride protection layer (2).