Aluminum sheath fireproof cable

Abstract

An aluminum sheath fireproof cable comprises an insulating cable core, an inner fireproof layer, an aluminum tape longitudinally-wrapped welding embossing inner protective layer, an outer fireproof layer, a waterproof layer, a flexible metal double-tape linkage armor layer and a low-smoke halogen-free polyolefin outer sheath, the insulating cable core comprises a conductor, a mineral synthetic mica tape and a ceramic polyolefin insulating layer, the mineral synthetic mica tape is wrapped outside the conductor, and the ceramic polyolefin insulating layer is wrapped outside the mineral synthetic mica tape. A ceramic polyolefin insulating layer is extruded outside the mineral synthetic mica tape, an inner fireproof layer is arranged outside the insulated cable core stranded body, gaps between the insulated cable cores and the inner fireproof layer and between the insulated cable cores are filled with fireproof filler, an aluminum tape longitudinal wrapping and welding corrugated inner sheath is welded outside the inner fireproof layer, and an outer fireproof layer is wound outside the aluminum tape longitudinal wrapping and welding corrugated inner sheath. According to the insulating cable core, the mineral synthetic mica tape and the inner fireproof layer are arranged outside the conductor, the insulating performance and the fireproof performance of the insulating cable core are improved, the outer fireproof layer is arranged outside the insulating cable core, and the fireproof filler is filled in the gap between the outer fireproof layer and the insulating cable core, so that the fireproof performance of the cable is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable production, in particular to an aluminum sheathed fireproof cable. Background Art

[0002] Cables are often used in equipment used in people's daily lives, such as elevators and home appliances, and need to have fire resistance. In the event of a fire, fire elevators and fire pump equipment need to maintain normal operation for a certain period of time, so the cables of these equipment need to have high fire and heat resistance. However, the conventional cables currently used have poor flame retardant properties and will produce a large amount of toxic and harmful gases after burning. The isolation fireproof layer uses materials such as fireproof mud, which is relatively hard and cannot guarantee the softness of the cable, making it unsuitable for use in some special environments. Summary of the Invention

[0003] The utility model aims to solve the deficiencies of the prior art and provides an aluminum sheathed fireproof cable.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0005] An aluminum sheathed fireproof cable comprises an insulating cable core, an inner fireproof layer, an aluminum tape longitudinally wrapped welded corrugated inner sheath, an outer fireproof layer, a waterproof layer, a flexible metal double-tape chain armor layer and a low-smoke halogen-free polyolefin outer sheath. The insulating cable core comprises a conductor, a mineral synthetic mica tape and a ceramic polyolefin insulation layer. The conductor is wrapped with a mineral synthetic mica tape, which is extruded with a ceramic polyolefin insulation layer. An inner fireproof layer is arranged outside the twisted body of the insulating cable core. Fireproof fillers are filled in the gaps between the insulating cable core and the inner fireproof layer and between the insulating cable cores. An aluminum tape longitudinally wrapped welded corrugated inner sheath is wrapped outside the inner fireproof layer. An outer fireproof layer is wrapped outside the aluminum tape longitudinally wrapped welded corrugated inner sheath. An outer fireproof layer is wrapped outside the outer fireproof layer. An extruded waterproof layer is wrapped outside the outer fireproof layer. A flexible metal double-tape chain armor layer is wrapped outside the waterproof layer. A low-smoke halogen-free polyolefin outer sheath is extruded outside the flexible metal double-tape chain armor layer.

[0006] The fireproof filler is ceramic silicone rubber.

[0007] The inner fireproof layer is a ceramic low-smoke halogen-free fire-resistant polyolefin oxygen-isolating tape layer.

[0008] The outer fireproof layer is a glass fiber cloth wrapping layer.

[0009] The waterproof layer is an expansion type water-blocking layer.

[0010] The flexible metal double-belt interlocking armor layer is formed by gap-wrap- ing a flexible aluminum belt and a flexible copper belt in two layers.

[0011] The beneficial effects of the utility model are as follows: the insulating cable core of the utility model is provided with a mineral synthetic mica tape and an inner fireproof layer outside the conductor, thereby improving the insulation performance and fireproof performance of the insulating cable core; an outer fireproof layer is provided on the outer side of the insulating cable core, and a fireproof filler is filled in the gap between the outer fireproof layer and the insulating cable core, thereby improving the fireproof performance of the cable; the provision of the waterproof layer enables the cable to have waterproof performance; the armor layer and the outer sheath protect the inner layer of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] In the figure: 1-conductor; 2-mineral synthetic mica tape; 3-ceramic polyolefin insulation layer; 4-fireproof filler; 5-inner fireproof layer; 6-aluminum tape longitudinally wrapped welded corrugated inner sheath; 7-outer fireproof layer; 8-waterproof layer; 9-flexible metal double-tape interlocking armor layer; 10-low-smoke halogen-free polyolefin outer sheath;

[0014] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] An aluminum sheathed fireproof cable comprises an insulating cable core, an inner fireproof layer 5, an aluminum tape longitudinally wrapped welded corrugated inner sheath 6, an outer fireproof layer 7, a waterproof layer 8, a flexible metal double-tape chain armor layer 9 and a low-smoke halogen-free polyolefin outer sheath 10. The insulating cable core comprises a conductor 1, a mineral synthetic mica tape 2 and a ceramic polyolefin insulation layer 3. The conductor 1 is wrapped with the mineral synthetic mica tape 2, and the mineral synthetic mica tape 2 is extruded with a ceramic polyolefin insulation layer 3. An inner fireproof layer 5 is arranged outside the twisted body of the insulating cable core. Fireproof filler 4 is filled in the gaps between the insulating cable core and the inner fireproof layer 5 and between the insulating cable cores. An aluminum tape longitudinally wrapped welded corrugated inner sheath 6 is welded outside the inner fireproof layer 5. The aluminum tape longitudinally wrapped welded corrugated inner sheath 6 is wrapped around the outer fireproof layer 7. The outer fireproof layer 7 is extruded with a waterproof layer 8. The waterproof layer 8 is wrapped around a flexible metal double-tape chain armor layer 9, and the flexible metal double-tape chain armor layer 9 is extruded with a low-smoke halogen-free polyolefin outer sheath 10.

[0017] The fireproof filler 4 is ceramic silicone rubber, which is converted into a non-combustible ceramic body under high temperature environment, isolating flames and improving fireproof performance.

[0018] The inner fireproof layer 5 is a ceramic low-smoke halogen-free fire-resistant polyolefin oxygen-isolating tape layer, which isolates the external oxygen to prevent the internal insulating cable core from catching fire.

[0019] The outer fireproof layer 7 is a glass fiber cloth tape layer. The glass fiber has high flame retardancy and improves the fireproof performance.

[0020] The waterproof layer 8 is an expandable water-blocking layer. The expandable water-blocking agent of the expandable water-blocking layer expands and squeezes into the gaps between the glass cloth wrappings of the outer fireproof layer 7, thereby preventing water vapor from entering the fireproof layer 7 and the inner part, thereby improving the waterproof performance.

[0021] The flexible metal double-belt interlocking armor layer 9 is formed by wrapping a flexible aluminum belt and a flexible copper belt in two layers with gaps, thereby ensuring the flexibility of the fireproof cable.

[0022] When used, the mineral synthetic mica tape 2 of the insulating cable core ensures that the conductor 1 has insulation properties. A ceramic polyolefin insulation layer 3 is set on the outside of the mineral synthetic mica tape 2. The ceramic polyolefin insulation layer 3 is converted into a fire-proof insulator after being heated at high temperature. The inner fireproof layer 5 and the outer fireproof layer 7 cooperate with the fireproof filler 4 to ensure the fireproof performance of the cable. The waterproof layer 8 makes the cable waterproof. The flexible metal double-tape interlocking armor layer 9 is formed by double-layer gap wrapping of flexible aluminum tape and flexible copper tape to ensure the softness of the cable. The aluminum tape longitudinally wrapped welded corrugated inner sheath 6 and the low-smoke halogen-free polyolefin outer sheath 10 are combined again into a fireproof structure to isolate flames and prevent heat from spreading.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0025] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0026] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. An aluminum sheathed fireproof cable, characterized in that: The invention comprises an insulated cable core, an inner fireproof layer (5), an aluminum tape longitudinally wrapped welded corrugated inner sheath (6), an outer fireproof layer (7), a waterproof layer (8), a flexible metal double-tape interlocking armor layer (9) and a low-smoke halogen-free polyolefin outer sheath (10), the insulated cable core comprises a conductor (1), a mineral synthetic mica tape (2) and a ceramic polyolefin insulation layer (3), the conductor (1) is wrapped with the mineral synthetic mica tape (2), the mineral synthetic mica tape (2) is extruded with the ceramic polyolefin insulation layer (3), and the insulated cable core is twisted externally. An inner fireproof layer (5) is provided, and the gaps between the insulating cable core and the inner fireproof layer (5) and between the insulating cable cores are filled with fireproof fillers (4); the inner fireproof layer (5) is welded with an aluminum strip longitudinally wrapped with a welded corrugated inner protective layer (6); the aluminum strip longitudinally wrapped with a welded corrugated inner protective layer (6) is wrapped with an outer fireproof layer (7); the outer fireproof layer (7) is extruded with a waterproof layer (8); the waterproof layer (8) is wrapped with a flexible metal double-belt interlocking armor layer (9); the flexible metal double-belt interlocking armor layer (9) is extruded with a low-smoke halogen-free polyolefin outer sheath (10).

2. The aluminum sheathed fireproof cable according to claim 1, characterized in that: The fireproof filler (4) is ceramic silicone rubber.

3. The aluminum sheathed fireproof cable according to claim 2, characterized in that: The inner fireproof layer (5) is a ceramic low-smoke halogen-free fire-resistant polyolefin oxygen-isolating tape layer.

4. The aluminum sheathed fireproof cable according to claim 3, characterized in that: The outer fireproof layer (7) is a glass fiber cloth wrapping layer.

5. The aluminum sheathed fireproof cable according to claim 4, characterized in that: The waterproof layer (8) is an expansion type water-blocking layer.

6. The aluminum sheathed fireproof cable according to claim 5, characterized in that: The flexible metal double-belt interlocking armor layer (9) is formed by double-layer gap wrapping of flexible aluminum belt and flexible copper belt.

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