CN211125116U

CN211125116U - Silicon rubber insulation ultra-high temperature fire-resistant cable

Info

Publication number: CN211125116U
Application number: CN202020159931.7U
Authority: CN
Inventors: 赵迪; 王志辉; 温鹏; 刘杰
Original assignee: Guangzhou Nanyang Cable Co ltd
Current assignee: Guangzhou Nanyang cable group Co.,Ltd.
Priority date: 2020-02-10
Filing date: 2020-02-10
Publication date: 2020-07-28
Anticipated expiration: 2030-02-10

Abstract

The utility model discloses an insulating ultra-temperature fire resisting cable of silicon rubber, including conductive core, silicon rubber insulating layer, filling layer, first band layer, metal sheath, separate oxygen layer, second band layer and outer jacket. The utility model discloses insulating ultra-high temperature fire resisting cable of silicon rubber has higher flame retardant property and comparatively stable fire resistance, and cooperates metal sheath's support, can maintain the integrality of cable under high temperature environment.

Description

Silicon rubber insulation ultra-high temperature fire-resistant cable

Technical Field

The utility model belongs to the technical field of the cable, especially, relate to an insulating ultra-temperature fire resisting cable of silicon rubber.

Background

In order to ensure the performances of high temperature resistance, high light transmittance, high insulation resistance, no toxicity in combustion and the like of the fire-resistant cable, a mica tape is wrapped outside a conductor in the prior art, then polyethylene insulation is extruded outside the mica tape, and an outer protective layer is made of a flame-retardant low-smoke high-molecular polyolefin material. The mica tape is a fire-resistant cable which is common in the industry at present, however, the material selection and the processing technology of the mica tape are very critical, and the stability of the fire-resistant cable with the structure is poor due to the uneven quality of the fire-resistant cables of different manufacturers.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model discloses silicon rubber insulation ultra-high temperature fire resisting cable, wherein the insulation core who is used for constituting the cable comprises conductive core and silicon rubber insulating layer, and insulating properties's stability has ensured that the cable can normally work for a long time under the flame temperature, has effectively protected cable run's integrality.

In order to realize the above-mentioned purpose, the utility model discloses an insulating ultra-high temperature fire resisting cable of silicon rubber, including conductive core, silicon rubber insulating layer, filling layer, first band layer, metal sheath, separate oxygen layer, second band layer and outer jacket, conductive core and silicon rubber insulating layer constitute insulation core, the stranded insulation core transposition constitutes the cable core, the center and the stranded of cable core the clearance department packing of insulation core has the filling layer, the cable core with the filling layer outside has first band layer, first band layer is equipped with metal sheath outward, metal sheath is crowded package outward separate the oxygen layer, separate the outer package of wrapping of oxygen layer the second band layer, the outer crowded package of second band layer the outer jacket.

As an alternative embodiment, the conductive wire core comprises a stranded copper monofilament or a copper stranded conductor.

As an optional embodiment, the material of the filling layer is a flame-retardant filling rope.

As an alternative embodiment, the metal sheath is welded longitudinally outside the first wrapping layer.

As an alternative embodiment, the oxygen barrier layer adopts a halogen-free low-smoke high-flame-retardant oxygen barrier polyolefin material with an oxygen index of more than 48 percent.

As an alternative embodiment, the second wrapping layer is made of glass fiber tape.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the embodiment of the utility model provides an insulating ultra-high temperature fire resisting cable of silicon rubber has higher flame retardant property and comparatively stable fire resistance, and cooperates metal sheath's support, can maintain the integrality of cable under high temperature environment.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a silicone rubber insulated ultra-high temperature fire-resistant cable according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The technical solution of the present invention will be further described with reference to the following embodiments and the accompanying drawings.

Example one

Referring to fig. 1, fig. 1 shows a schematic structural diagram of a silicone rubber insulated ultra-high temperature fire-resistant cable according to the present invention. The embodiment of the utility model discloses silicon rubber insulation ultra-high temperature fire resisting cable, including conductive core, silicon rubber insulating layer, filling layer, first band layer, metal sheath, separate oxygen layer, second band layer and outer jacket.

Specifically, a plurality of strands of copper single wires or a copper stranded conductor can be used as a conductive wire core, so that the flexibility requirement of the cable is met while normal electric energy transmission is ensured.

The conductive wire core and the silicon rubber insulating layer form an insulating wire core, and a plurality of strands (such as 4-6 strands, 5 strands shown in figure 1) of the insulating wire core are stranded to form the cable core. Wherein the silicon rubber insulating layer ensures that the high temperature can be endured under the fire condition and the good insulation resistance can be still maintained. The silicon rubber insulating material has a wide temperature use range, and a silica hard shell inorganic insulator is formed on the surface of a conductor under high-temperature combustion, so that the silicon rubber insulating material has excellent electrical insulating property. The filling layer is filled in the center of the cable core and the gaps of the multiple strands of insulating cable cores and consists of high-temperature-resistant flame-retardant filling ropes, such as high-flame-retardant inorganic paper ropes or high-flame-retardant polypropylene filling ropes, so that the integrity of the cable core can be ensured, and the flame-retardant property can be improved. A first wrapping layer is wrapped outside the cable core and the filling layer. The first wrapping layer adopts a high-temperature-resistant flame-retardant wrapping tape, is used for tightening the cable core, and can further strengthen heat insulation. A metal sheath is arranged outside the first wrapping layer, is made of copper materials, aluminum materials and other metals and is mainly used as a framework to play a supporting role. This metal sheath is crowded outward and is wrapped up and separate the oxygen layer, should separate the oxygen layer for oxygen index is greater than 48% halogen-free low smoke high fire-retardant oxygen-proof polyolefin material, can realize under the high temperature, separates out moisture, reduces the inside temperature of cable to form hard casing, block the infiltration burning of flame. And a second wrapping tape layer made of a wrapping tape material which is a glass fiber tape material with good fire resistance is further wrapped outside the oxygen-isolating layer, so that the oxygen-isolating layer is good in insulation property, strong in heat resistance, good in corrosion resistance and high in mechanical strength, can be kept tight when being burned by flame with high temperature, and prevents the oxygen-isolating layer in the oxygen-isolating layer from dropping due to flame impact. An outer protective layer is extruded outside the second wrapping layer, and the outer protective layer is made of halogen-free low-smoke flame-retardant polyolefin material which has the characteristics of no toxic emission, high light transmittance, flame retardance and the like under the condition of fire.

The embodiment of the utility model discloses insulating ultra-high temperature fire resisting cable of silicon rubber does not adopt the mica layer in the traditional cable, can guarantee long-time fire resistance and insulating nature under high temperature environment (like 1050 ℃) such as conflagration, and its luminousness is high, nontoxic gives off.

The silicone rubber insulated ultra-high temperature fire-resistant cable disclosed by the embodiment of the invention is described in detail above, and the principle and the implementation mode of the invention are explained by applying a specific example, and the description of the above embodiment is only used for helping to understand the silicone rubber insulated ultra-high temperature fire-resistant cable and the core idea thereof; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, and in summary, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. The utility model provides an ultra-high temperature fire resisting cable of silicon rubber insulation, its characterized in that includes conductive core, silicon rubber insulating layer, filling layer, first band layer, metal sheath, separates oxygen layer, second band layer and outer jacket, conductive core and silicon rubber insulating layer constitute insulating core, the stranded insulating core transposition constitutes the cable core, the center and the stranded of cable core the clearance department of insulating core is filled with the filling layer, the cable core with the filling layer outside is equipped with first band layer, first band layer is equipped with metal sheath outward, crowded package outward of metal sheath separate the oxygen layer, separate the outer package of oxygen layer the second band layer, crowded package outward of second band layer the outer jacket.

2. The silicone rubber insulated ultra-high temperature fire-resistant cable according to claim 1, wherein: the conductive wire core comprises a plurality of stranded copper monofilaments or copper stranded conductors.

3. The silicone rubber insulated ultra-high temperature fire-resistant cable according to claim 1 or 2, wherein: the filling layer is made of flame-retardant filling ropes.

4. The silicone rubber insulated ultra-high temperature fire-resistant cable according to claim 1 or 2, wherein: the metal sheath is longitudinally wrapped and welded outside the first wrapping tape.

5. The silicone rubber insulated ultra-high temperature fire-resistant cable according to claim 1 or 2, wherein: the oxygen-isolating layer is made of halogen-free low-smoke high-flame-retardant oxygen-isolating polyolefin material with oxygen index larger than 48%.

6. The silicone rubber insulated ultra-high temperature fire-resistant cable according to claim 1 or 2, wherein: the second wrapping band layer adopts a glass fiber strip.