A multi-layer fire-retardant thermal-insulation cable and a method for manufacturing the same

Abstract

The application discloses a kind of multilayer flame-retardant heat-insulating cable and manufacturing method thereof, the cable includes heat reflection layer, flame-retardant layer, heat-insulating layer, protective layer and cable main body, the cable main body includes core and insulating layer, the insulating layer is wrapped the core, the protective layer is wrapped the insulating layer, the heat-insulating layer is wrapped the protective layer, the flame-retardant layer is wrapped the heat-insulating layer, the heat reflection layer is wrapped the flame-retardant layer.The cable of the application is wrapped by the multilayer cable protection layer of heat reflection layer, flame-retardant layer, heat-insulating layer, protective layer, and the flame-retardant heat-insulating property is greatly improved, the problem of core or insulating skin melting of cable under high temperature is solved, the reliability of product is greatly strengthened, and safety is also improved.Simultaneously, the external impact resistance and environmental adaptability of cable are improved, and the core melting problem of cable under heat extrusion can be solved well.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable manufacturing, in particular to a multi-layer flame-retardant and heat-insulating cable and a manufacturing method thereof. BACKGROUND

[0002] All industrial production, transportation, construction engineering, modern agriculture, scientific research, military equipment, space exploration, ocean exploration, and even people's daily life cannot do without the use of cables. The stability of cable performance affects the normal operation of the system. However, while enhancing the protection of the internal structure of the cable, the external protection of the cable is largely ignored, especially the heat protection in high-temperature environments.

[0003] At present, many ground weapon system external cable networks need to be wired on the vehicle side beam, and the diameter of this part of the cable is relatively thick. The cable is very close to the exhaust pipe of the engine, and the ambient temperature around the exhaust pipe is very high under the long-time work of the engine. The heated and extruded cable is easy to cause the insulation skin and the core to melt. This not only affects the shielding effect of the cable, but also has safety hazards, and seriously affects the production efficiency.

[0004] The existing solution generally protects the cable outer sleeve. The existing cable protection sleeve is generally divided into two types. The first type is asbestos cloth or asbestos tape, and the second type is a corrugated sleeve.

[0005] 1) The asbestos cloth can play a role in flame retardation, but when the cable is subjected to an increase in ambient temperature, it cannot achieve good heat insulation effect for a long time. In addition, the asbestos cloth produces asbestos dust in the application process, which can cause lung diseases and other problems when inhaled into the human body.

[0006] 2) The existing plastic corrugated sleeve is mainly divided into three materials of PP, PA and PE. Although the flame-retardant type can be selected, it is mainly used for protecting the wire harness and bare wire. When the diameter of the cable is relatively thick, the selection of the corrugated sleeve will increase the operation difficulty, and there is no heat insulation effect. SUMMARY

[0007] In view of the problems existing in the prior art, the purpose of the present application is to provide a multi-layer flame-retardant and heat-insulating cable and a manufacturing method thereof, which can improve the flame-retardant and heat-insulating effect of the cable outside, and avoid the melting of the core or the insulation skin of the cable due to high temperature.

[0008] To achieve the above object, the first aspect of the present application provides a multi-layer fire-retardant and heat-insulating cable, comprising a heat-reflecting layer, a fire-retardant layer, a heat-insulating layer, a protective layer and a cable main body, the cable main body comprising a core and an insulating layer, the insulating layer wrapping the core, the protective layer wrapping the insulating layer, the heat-insulating layer wrapping the protective layer, the fire-retardant layer wrapping the heat-insulating layer, and the heat-reflecting layer wrapping the fire-retardant layer, the cable main body being protected by the combined action of the protective layer, the heat-insulating layer, the fire-retardant layer and the heat-reflecting layer.

[0009] Further, the protective layer is high-loft glass fiber, which has a plurality of bubble holes for air circulation, and the heat generated by the cable main body during operation can be discharged to the outside through the bubble holes.

[0010] Further, the heat-insulating layer is foamed polyurethane material to block external heat.

[0011] Further, the fire-retardant layer is graphite polyphenyl material added with silicone resin, which blocks external heat through the heat-insulating effect of the graphite polyphenyl material and generates a pyrolytic carbon layer for fire retardation through the added silicone resin and graphite polyphenyl material.

[0012] Further, the heat-reflecting layer is aluminum-nickel foil-coated polyimide film, which reflects the heat acting on the cable to the outside.

[0013] Further, the aluminum-nickel foil-coated polyimide film comprises, in order from the outside, an aluminum-coated layer, a nickel-coated layer and a polyimide film layer, the thickness of the polyimide film layer being 10-30 micrometers, the thickness of the nickel-coated layer being 0.5-2 micrometers, and the thickness of the aluminum-coated layer being 0.5-2 micrometers.

[0014] Further, the heat-reflecting layer is circumferentially provided with a tie strap to bind and fix the heat-reflecting layer, the fire-retardant layer, the heat-insulating layer and the protective layer on the cable main body.

[0015] The second aspect of the present application provides a manufacturing method of the multi-layer fire-retardant and heat-insulating cable according to the first aspect, comprising the following steps:

[0016] cleaning the surface of the insulating skin of the cable main body and keeping the cable main body horizontal;

[0017] winding and wrapping the protective layer on the outside of the insulating skin;

[0018] winding and wrapping the heat-insulating layer on the outside of the protective layer;

[0019] winding and wrapping the fire-retardant layer on the outside of the heat-insulating layer;

[0020] ​​​The heat reflecting layer is wrapped around the outside of the flame-retardant layer.

[0021] Further, the method further comprises the following steps:

[0022] The protective layer, the heat insulation layer, the flame-retardant layer and the heat reflecting layer are fixed on the cable body by binding the straps on the periphery of the heat reflecting layer.

[0023] Further, force is applied when the protective layer is wrapped outside the insulation skin, so that the protective layer is tightly combined with the insulation skin; force is applied when the heat insulation layer is wrapped outside the protective layer, so that the heat insulation layer is tightly combined with the protective layer; force is applied when the flame-retardant layer is wrapped outside the heat insulation layer, so that the flame-retardant layer is tightly combined with the heat insulation layer; and force is applied when the heat reflecting layer is wrapped outside the flame-retardant layer, so that the heat reflecting layer is tightly combined with the flame-retardant layer.

[0024] The cable of the present application is wrapped by the multi-layer cable protection layers of the heat reflecting layer, the flame-retardant layer, the heat insulation layer and the protective layer, so that the flame-retardant and heat insulation properties are greatly improved, the problem of the wire core or the insulation skin melting under high temperature is solved, the reliability of the product is greatly strengthened, and the safety is also improved. Meanwhile, the external impact resistance and the environmental adaptability of the cable are improved, and the problem of the wire core melting under the heat and extrusion in the cable field can be well solved.

[0025] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0027] Figure 1 A cross-sectional view of a multi-layer flame-retardant and heat-insulating cable according to an embodiment of the present application;

[0028] Figure 2 A cross-sectional view of a multi-layer flame-retardant and heat-insulating cable according to an embodiment of the present application;

[0029] Figure 3 A cross-sectional view of a heat reflecting layer according to an embodiment of the present application;

[0030] Figure 4 A flow chart of a manufacturing method of a multi-layer flame-retardant and heat-insulating cable according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations can be implemented in any number of manners, and are not limited to the examples described herein; rather, examples are provided so that this disclosure will be more thorough and complete, and will fully convey the spirit of example implementations to those skilled in the art.

[0032] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited otherwise, the term "connected" should be construed broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected, can be mechanically connected, or can be electrically connected, can be directly connected, or can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0033] The terms "top", "bottom", "above", "under", "over", "left and right direction", "up and down direction" used throughout the description are relative positions of components of the device, for example, relative positions of the top and bottom substrates inside the device. It can be understood that the device is multifunctional, regardless of their orientation in space.

[0034] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Therefore, the features of "first", "second" defined can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0035] In order to make the purpose, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0036] As shown in Figure 1 and 2 The multilayer flame-retardant heat-insulating cable of the present application includes a heat-reflecting layer 1, a flame-retardant layer 2, a heat-insulating layer 3, a protective layer 4, and a cable main body, the cable main body includes a core 51 and an insulating layer 52, the insulating layer 52 wraps the core 51, the protective layer 4 wraps the insulating layer 52, the heat-insulating layer 3 wraps the protective layer 4, the flame-retardant layer 2 wraps the heat-insulating layer 3, and the heat-reflecting layer 1 wraps the flame-retardant layer 2, the cable main body is protected by the combined action of the protective layer 4, the heat-insulating layer 3, the flame-retardant layer 2, and the heat-reflecting layer 1.

[0037] In one embodiment of the present invention, the protective layer 4 is high-loft glass fiber, which has multiple air bubbles to allow air circulation. Heat generated by the cable body during operation can be dissipated to the outside through these air bubbles. High-loft glass fiber has many air bubbles, high tensile strength, and high impact energy absorption; furthermore, its high loft ensures better air circulation and better heat dissipation.

[0038] In one embodiment of the present invention, the insulation layer 3 is made of foamed polyurethane to block external heat. This material has excellent performance among organic insulation materials. In addition, foamed polyurethane also has the characteristics of good integrity and waterproofness, simple operation, long service life, and good thermal insulation performance.

[0039] In one embodiment of the present invention, the flame-retardant layer 2 is a graphite polystyrene material with added organosilicon resin. The graphite polystyrene material blocks external heat through its heat insulation effect, and the added organosilicon resin and graphite polystyrene material generate a cracked carbon layer for flame retardancy. The graphite polystyrene material utilizes the heat reflection formed by the graphite fireproof layer to reduce the thermal conductivity of the insulation board, thus achieving a heat insulation effect. The flame-retardant mechanism of the added organosilicon resin is mainly manifested as a condensed phase flame-retardant mechanism, that is, its flame-retardant effect is achieved by generating a cracked carbon layer and improving the oxidation resistance of the carbon layer. This prevents the conductor core or insulation of the cable from melting in high-temperature environments.

[0040] In one embodiment of the present invention, the heat-reflective layer 1 is an aluminum-nickel foil-plated polyimide film, which reflects the heat acting on the cable to the outside. The heat-reflective layer 1 has a high reflectivity; through the reflection of the layer, heat can be reflected away, preventing internal structural damage and fires in the cable under high-temperature conditions. For example... Figure 3 As shown, the aluminum-nickel foil polyimide film, from the outside to the inside, sequentially includes an aluminum plating layer 11, a nickel plating layer 12, and a polyimide film layer 13, the thickness of which is... The thickness of the nickel plating layer 12 is [cm]. The thickness of the aluminum plating layer 11 is in micrometers. Micrometers. This structure can improve the reflectivity of the heat-reflective layer in aluminum-nickel foil polyimide films, thus improving the reflectivity of the heat-reflective layer in reflecting external heat.

[0041] In one embodiment of the present invention, the heat reflective layer 1 is circumferentially provided with cable ties 6 to bind and fix the heat reflective layer 1, flame retardant layer 2, heat insulation layer 3 and protective layer 4 to the cable body, ensuring that each protective layer does not slip or fall off on the cable insulation layer 52.

[0042] like Figure 4 As shown, the manufacturing method of the multilayer flame-retardant and heat-insulating cable includes the following steps:

[0043] Step S410: clean the surface of the insulating skin of the cable body and keep the cable body horizontal. Wherein, the cable is kept horizontal by fixing on the frame suspension beam, ensuring that the binding place is not bent, twisted and other conditions, so as to ensure that the subsequent protective layer is tightly wrapped.

[0044] Step S420: wrapping the protective layer on the outside of the insulating skin;

[0045] Step S430: wrapping the heat insulation layer on the outside of the protective layer;

[0046] Step S440: wrapping the fire-retardant layer on the outside of the heat insulation layer;

[0047] Step S450: wrapping the heat reflection layer on the outside of the fire-retardant layer.

[0048] After step S450, step S460 is further included:

[0049] Step S460: binding the protective layer, heat insulation layer, fire-retardant layer and heat reflection layer on the cable body by binding the tape on the periphery of the heat reflection layer.

[0050] In steps S420-S450, in step S420, the outside of the cable insulating skin is wrapped in a clockwise direction by a high-loft fiber layer, and the wrapping is without gap in the middle. When wrapping, appropriate force should be added to the fiber layer in the wrapping direction, so as to ensure better contact between the fiber layer and the cable insulating skin. On the basis of step S420, in step S430, the high-loft fiber layer is wrapped in a clockwise direction by a foamed polyurethane layer, and the wrapping is without gap in the middle. When wrapping, appropriate force should be added to the foamed polyurethane layer in the wrapping direction, so as to ensure better contact between the foamed polyurethane layer and the high-loft fiber layer. On the basis of step S430, in step S440, the high-loft fiber layer is wrapped in a clockwise direction by a graphite polyphenyl layer added with silicone resin, and the wrapping is without gap in the middle. When wrapping, appropriate force should be added to the graphite polyphenyl layer added with silicone resin in the wrapping direction, so as to ensure better contact with the previous layer. On the basis of step S440, in step S450, the high-loft fiber layer is wrapped in a clockwise direction by an aluminum-nickel foil polyimide film layer, and the wrapping is without gap in the middle. When wrapping, appropriate force should be added to the aluminum-nickel foil polyimide film layer in the wrapping direction, so as to ensure better contact between the aluminum-nickel foil polyimide film layer and the high-loft fiber layer.

[0051] In conclusion, the cable of the present application is wrapped and packaged by the multi-layer cable protection structure, the flame-retardant and heat-insulating properties are enhanced, the problem of the core or the insulating skin melting of the cable under high temperature is solved, the reliability of the product is greatly enhanced, and the safety is also improved. Meanwhile, the external impact resistance and environmental adaptability of the cable are improved, and the problem of the core melting of the cable under the heat and extrusion in the field can be well solved.

[0052] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0053] It is to be understood that the application is not limited to the precise details of construction and the above-described and illustrated exact structure herein shown and there is no intention that the application be limited to the details of construction or the exact structure herein shown. The application is intended to cover any adaptations or variations of the application followed in the spirit and scope of the application. The application is only to be limited by the claims.

Claims

1. A multi-layer flame-retardant and heat-insulating cable, characterized in that, The cable body comprises a heat-reflective layer, a flame-retardant layer, a heat-insulating layer, a protective layer, and a cable body. The cable body includes a conductor and an insulation layer. The insulation layer wraps the conductor, the protective layer wraps the insulation layer, the heat-insulating layer wraps the protective layer, the flame-retardant layer wraps the heat-insulating layer, and the heat-reflective layer wraps the flame-retardant layer. The cable body is protected by the combined action of the protective layer, the heat-insulating layer, the flame-retardant layer, and the heat-reflective layer. The heat-reflective layer is an aluminized nickel foil polyimide film, which reflects heat acting on the cable to the outside. The flame-retardant layer is a graphite polystyrene material with added silicone resin, which blocks external heat through its heat-insulating effect. The added silicone resin and graphite polystyrene material generate a cracked carbon layer for flame retardancy. The heat-insulating layer is a foamed polyurethane material to block external heat. The protective layer is high-bulb glass fiber with multiple air bubbles for air circulation, allowing heat generated during cable body operation to dissipate to the outside. The aluminum-nickel foil-plated polyimide film comprises, from the outside to the inside, an aluminum plating layer, a nickel plating layer, and a polyimide film layer, wherein the thickness of the polyimide film layer is [missing information]. cm, the thickness of the nickel plating layer is The thickness of the aluminum plating layer is micrometers. Micrometer.

2. The multi-layer flame-retardant and heat-insulating cable as described in claim 1, characterized in that, The heat reflective layer, flame retardant layer, heat insulation layer and protective layer are circumferentially bound and fixed to the cable body with cable ties.

3. A method for manufacturing a multilayer flame-retardant and heat-insulating cable as described in claim 1 or 2, characterized in that, Includes the following steps: Clean the surface of the cable insulation and keep the cable body horizontal; The protective layer is wrapped around the outside of the insulation. The heat insulation layer is wrapped around the outside of the protective layer; The flame-retardant layer is wrapped around the outside of the heat insulation layer; The heat-reflective layer is burned and wrapped around the outside of the flame-retardant layer.

4. The manufacturing method as described in claim 3, characterized in that, It also includes the following steps: The protective layer, heat insulation layer, flame retardant layer, and heat reflective layer are secured to the cable body by binding cable ties around the outer periphery of the heat reflective layer.

5. The manufacturing method as described in claim 3, characterized in that, Force is applied when the protective layer is wrapped around the outside of the insulation layer to ensure a tight bond between the protective layer and the insulation layer; force is applied when the heat insulation layer is wrapped around the outside of the protective layer to ensure a tight bond between the heat insulation layer and the protective layer; force is applied when the flame retardant layer is wrapped around the outside of the heat insulation layer to ensure a tight bond between the flame retardant layer and the heat insulation layer; and force is applied when the heat reflective layer is wrapped around the outside of the flame retardant layer to ensure a tight bond between the heat reflective layer and the flame retardant layer.

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