Silicone rubber insulation flexible fireproof cable capable of being vitrified

Abstract

The utility model discloses a silicone rubber insulation flexible fireproof cable capable of being vitrified, which comprises a flame-retardant outer sheath, an aramid fiber silk screen is fixedly arranged on the inner side of the flame-retardant outer sheath, and a heat insulation layer is fixedly arranged on the inner side of the aramid fiber silk screen. The ceramic silicone rubber is adopted as an insulating material of the cable, the defects of an original fireproof cable in production processing, laying installation and application are overcome, the ceramic silicone rubber has the characteristics of high and low temperature resistance, aging resistance, excellent electrical insulation and the like of silicone rubber, and the ceramic silicone rubber can be prevented from falling off at the high temperature of 500 DEG C or above and under flame ablation. Organic components can be ablated and converted into hard ceramic substances in a very short time, a good isolation layer is formed, continuous combustion of flames is blocked, the longer the ablation time is, the higher the temperature is, the more obvious the hard effect is, the ceramic silicone rubber can resist fire to 1200-1500 DEG C, and the flame-retardant and fireproof performance is remarkable.

Description

Technical Field

[0001] The utility model relates to the technical field of fireproof cables, in particular to a ceramicizable silicone rubber insulated flexible fireproof cable. Background Art

[0002] In order to prevent power accidents from causing fires or power cables from causing secondary accidents when damaged by fire, power cables must have reliable fire protection functions. When a fire occurs, the cables can maintain normal and continuous power supply within a specified time at a specified flame temperature, so as to facilitate firefighting and rescue, reduce casualties and economic losses. Therefore, increasing the fire resistance temperature and extending the burning time have become the most important technical concepts in the design of fireproof cables.

[0003] However, existing cables will burn quickly due to their low fire resistance. At the same time, during long-term use, the protective layer on the surface of the cable will age and the internal flame retardant components will fall off in large quantities, which greatly reduces the fire resistance effect. The cable will crack or break when bent by external forces, affecting the normal use of the cable. Utility Model Content

[0004] The purpose of the utility model is to provide a ceramic silicone rubber insulated flexible fireproof cable to solve the problem that the existing fireproof cables mentioned in the above background technology are insufficient in flame retardancy and fireproofness, and are easily bent by external forces and cracked or damaged during long-term use.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ceramicizable silicone rubber insulated flexible fireproof cable, comprising a flame-retardant outer sheath, an aramid wire mesh is fixedly arranged on the inner side of the flame-retardant outer sheath, an insulation layer is fixedly arranged on the inner side of the aramid wire mesh, a flame-retardant glass fiber tape wrapping layer is fixedly arranged on the inner side of the insulation layer, a mica tape wrapping layer is fixedly arranged on the inner side of the flame-retardant glass fiber tape wrapping layer, a ceramicizable inorganic composite mineral isolation sleeve is fixedly arranged on the inner side of the mica tape wrapping layer, a ceramicizable inorganic composite mineral filling layer is fixedly arranged on the inner side of the ceramicizable inorganic composite mineral isolation sleeve, and four cable core components and an anti-pull rib are fixedly arranged inside the ceramicizable inorganic composite mineral filling layer.

[0006] Preferably, the four cable core components and one anti-pull rib are hinged, and the hinge direction is to the right; the anti-pull performance is excellent.

[0007] Preferably, the cable core assembly includes a ceramic silicone rubber insulation layer and a copper conductor fixedly arranged inside the ceramic silicone rubber insulation layer; under high temperature and flame ablation, the organic components will be ablated and converted into a hard ceramic-like substance in a very short time, forming a good insulation layer with significant fire-retardant effect.

[0008] Preferably, the cross-section of the copper conductor core may be circular or polygonal, and the copper conductor core may be a single-core conductor or a multi-core twisted conductor; the styles are diverse and the practicability is strong.

[0009] Preferably, the heat insulation layer is made of polyethylene material, and the thickness of the heat insulation layer is set to 1.0-1.5 mm; it can play a role of heat insulation and prevent the internal cable from high temperature.

[0010] Preferably, the flame retardant outer sheath is made of halogen-free low-smoke polyolefin material, and the thickness of the flame retardant outer sheath is set to 2mm; the flame retardant performance is significant, there is less smoke and dust under high altitude conditions, and it is more environmentally friendly.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The use of ceramic silicone rubber as the insulation material of the cable makes up for the shortcomings of the original fireproof cable in production, processing, laying, installation and application. Ceramic silicone rubber has the characteristics of silicone rubber such as high and low temperature resistance, aging resistance, and excellent electrical insulation. Moreover, under high temperature and flame ablation above 500℃, the organic components will be ablated and transformed into a hard ceramic-like substance in a very short time, forming a good insulation layer to prevent the flame from continuing to burn. The longer the ablation time and the higher the temperature, the more obvious the hardening effect. Ceramic silicone rubber can be fire-resistant to 1200-1500℃, and has significant flame retardant and fireproof properties.

[0013] Anti-pull ribs are added inside the cable and a composite aramid mesh is added to the outer sheath, which can increase the cable's resistance to pulling without affecting the flexibility of the cable. After multiple bending, the surface sheath is not easy to crack and break, and the anti-scratch performance is also improved. It has stronger weather resistance and longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the partial structure of the flexible fireproof cable of the utility model;

[0015] Figure 2 This is a front cross-sectional view of the flexible fireproof cable of the utility model;

[0016] Figure 3 This is a cross-sectional view of the cable core type of the utility model.

[0017] In the figure: 1. Flame-retardant outer sheath; 2. Aramid wire mesh; 3. Heat insulation layer; 4. Flame-retardant glass fiber tape wrapping layer; 5. Mica tape wrapping layer; 6. Ceramic inorganic composite mineral isolation sleeve; 7. Ceramic inorganic composite mineral filling layer; 8. Ceramic silicone rubber insulation layer; 9. Copper conductor core; 10. Anti-pull reinforcement. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] See also Figure 1-3 The utility model provides a ceramicizable silicone rubber insulated flexible fireproof cable, comprising a flame retardant outer sheath 1, an aramid wire mesh 2 is fixedly arranged on the inner side of the flame retardant outer sheath 1, a heat insulation layer 3 is fixedly arranged on the inner side of the aramid wire mesh 2, a flame retardant glass fiber tape wrapping layer 4 is fixedly arranged on the inner side of the heat insulation layer 3, a mica tape wrapping layer 5 is fixedly arranged on the inner side of the flame retardant glass fiber tape wrapping layer 4, a ceramicizable inorganic composite mineral isolation sleeve 6 is fixedly arranged on the inner side of the ceramicizable inorganic composite mineral isolation sleeve 6, a ceramicizable inorganic composite mineral filling layer 7 is fixedly arranged on the inner side of the ceramicizable inorganic composite mineral filling layer 7, and four cable core components and an anti-pull reinforcement 10 are fixedly arranged inside the ceramicizable inorganic composite mineral filling layer 7.

[0020] See also Figure 1 , Figure 2 and Figure 3 Further, four cable core components and an anti-pull rib 10 are hinged, and the hinge direction is rightward. The cable core component includes a ceramic silicone rubber insulation layer 8 and a copper conductor 9 fixedly arranged inside the ceramic silicone rubber insulation layer 8. The cross-section of the copper conductor 9 can be circular or polygonal, and the copper conductor 9 can be a single-core conductor or a multi-core hinged conductor;

[0021] When in use, the copper conductor core 9 conforms to the provisions of the first solid annealed copper conductor or the second twisted annealed copper conductor in GB / T3956-2008. The second twisted annealed copper conductor structure can be round single wire twisted, compacted, non-compacted conductor, profiled wire twisted conductor, the conductor shape can be round or special-shaped conductor, with low resistivity and good high temperature resistance.

[0022] See also Figure 1 and Figure 2 , further, the heat insulation layer 3 is made of polyethylene material, and the thickness of the heat insulation layer 3 is set to 1.0-1.5 mm, the flame retardant outer sheath 1 is made of halogen-free low-smoke polyolefin material, and the thickness of the flame retardant outer sheath 1 is set to 2 mm;

[0023] When in use, the halogen-free low-smoke polyolefin is the outermost layer, which is fireproof, insulating, moisture-proof, waterproof, and corrosion-resistant. It is not easy to crack or break after long-term use, has a long service life, and has a significant thermal insulation effect.

[0024] When the embodiment of the present application is in use: the insulating layer is made of ceramic refractory silicone rubber, which can withstand high temperatures of 1200-1500°C and can be extruded on a continuous vulcanization production line. The cable core cabling direction is right-handed, and the cable core isolation sleeve is made of extruded ceramic inorganic composite mineral oxide. The mineral isolation layer is allowed to fill the gap in the outer layer of the insulating core, and the isolation layer is allowed to be wrapped with a suitable tape. The mineral isolation layer is smokeless and does not produce harmful gases. It can withstand high temperatures of up to 2000°C. Under high temperature conditions, the insulating layer will be ceramicized to form a good insulating layer to prevent the flame from continuing to burn. The longer the ablation time and the higher the temperature, the more obvious the hardening effect. The hard ceramic armor can withstand spraying and vibration, and has significant thermal insulation effect. The flame retardant outer sheath 1 adopts 90°C orange halogen-free low-smoke flame retardant polyolefin sheath material.

[0025] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ceramicizable silicone rubber insulated flexible fireproof cable, comprising a flame retardant outer sheath (1), characterized in that: An aramid wire mesh (2) is fixedly arranged on the inner side of the flame-retardant outer sheath (1), an insulation layer (3) is fixedly arranged on the inner side of the aramid wire mesh (2), a flame-retardant glass fiber tape wrapping layer (4) is fixedly arranged on the inner side of the insulation layer (3), a mica tape wrapping layer (5) is fixedly arranged on the inner side of the flame-retardant glass fiber tape wrapping layer (4), a ceramicized inorganic composite mineral isolation sleeve (6) is fixedly arranged on the inner side of the mica tape wrapping layer (5), a ceramicized inorganic composite mineral filling layer (7) is fixedly arranged on the inner side of the ceramicized inorganic composite mineral isolation sleeve (6), and four cable core components and an anti-pull rib (10) are fixedly arranged inside the ceramicized inorganic composite mineral filling layer (7).

2. The ceramicizable silicone rubber insulated flexible fireproof cable according to claim 1, characterized in that: The four cable core components and an anti-tension rib (10) are hinged, and the hinge direction is rightward.

3. A ceramicizable silicone rubber insulated flexible fireproof cable according to claim 2, characterized in that: The cable core assembly comprises a ceramicizable silicone rubber insulation layer (8) and a copper conductor core (9) fixedly arranged inside the ceramicizable silicone rubber insulation layer (8).

4. The ceramicizable silicone rubber insulated flexible fireproof cable according to claim 3, characterized in that: The cross section of the copper conductor core (9) may be circular or polygonal, and the copper conductor core (9) may be a single-core conductor or a multi-core twisted conductor.

5. The ceramicizable silicone rubber insulated flexible fireproof cable according to claim 1, characterized in that: The heat insulation layer (3) is made of polyethylene material, and the thickness of the heat insulation layer (3) is set to 1.0-1.5 mm.

6. The ceramicizable silicone rubber insulated flexible fireproof cable according to claim 1, characterized in that: The flame retardant outer sheath (1) is made of a halogen-free low-smoke polyolefin material, and the thickness of the flame retardant outer sheath (1) is set to 2 mm.

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