Novel low-smoke halogen-free flame-retardant power cable

Abstract

The utility model belongs to the technical field of cables, in particular to a novel low-smoke halogen-free flame-retardant power cable, which comprises five conductors, fire-resistant mica tapes are fixed on the surfaces of the five conductors, first insulating sheath layers are fixed on the surfaces of the fire-resistant mica tapes, first waterproof coatings are fixed on the surfaces of the first insulating sheath layers, and second waterproof coatings are fixed on the surfaces of the second insulating sheath layers. The surfaces of the five first waterproof coatings are wrapped with a glass fabric wrapping layer, a filling layer is arranged between the glass fabric wrapping layer and the five first waterproof coatings, and a shielding layer is fixed to the surface of the glass fabric wrapping layer. According to the utility model, the fire-resistant mica tape, the glass fabric wrapping layer and the flame-retardant coating are arranged to achieve a better flame-retardant effect, the first waterproof coating and the second waterproof coating are arranged to achieve a better waterproof effect, and the foamed polypropylene buffer layer is arranged to achieve a better compression-resistant buffer effect. Therefore, the overall performance of the cable is improved, and the cable is not easy to damage.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a novel low-smoke halogen-free flame-retardant power cable. Background Art

[0002] Cable is an electrical energy or signal transmission device, usually composed of several or several groups of wires. The current flame retardant and waterproof properties of cables are not very good. When encountering harsh environments, they are easily damaged. The current cable's compressive performance is also not very good. When encountering compression, it is also easy to be damaged. Therefore, we proposed a new type of low-smoke halogen-free flame retardant power cable to solve the above problems. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the deficiencies in the prior art, the present invention provides a novel low-smoke halogen-free flame-retardant power cable, which solves the problems raised in the above-mentioned background technology.

[0005] (2) Technical solution

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] A new type of low-smoke halogen-free flame-retardant power cable, comprising five conductors, wherein the surfaces of the five conductors are fixed with fire-resistant mica tapes, the surfaces of the fire-resistant mica tapes are fixed with a first insulating sheath layer, the surfaces of the first insulating sheath layer are fixed with a first waterproof coating, the surfaces of the five first waterproof coatings are wrapped with a glass fiber cloth wrapping layer, a filling layer is provided between the glass fiber cloth wrapping layer and the five first waterproof coatings, a shielding layer is fixed with a foamed polypropylene buffer layer on the surface of the shielding layer, a second insulating sheath layer is fixed with an armor layer on the surface of the second insulating sheath layer, a third insulating sheath layer is fixed with a flame retardant coating on the surface of the third insulating sheath layer, and a second waterproof coating is fixed with the surface of the flame retardant coating.

[0008] Furthermore, a reinforcing core is provided at the center of the filling layer, and the filling layer is a low-smoke halogen-free flame-retardant rope.

[0009] Furthermore, the first insulating sheath layer, the second insulating sheath layer and the third insulating sheath layer are all low-smoke halogen-free flame-retardant polyolefin sheaths.

[0010] Furthermore, the first waterproof coating layer and the second waterproof coating layer are both polyurea waterproof coating layers.

[0011] Furthermore, the flame retardant coating is an intumescent organic silicon flame retardant coating layer.

[0012] (3) Beneficial effects

[0013] Compared with the existing technology, the utility model provides a new type of low-smoke halogen-free flame-retardant power cable, which has the following beneficial effects:

[0014] The utility model can achieve a good flame retardant effect by arranging the fire-resistant mica tape, the glass fiber cloth wrapping layer and the flame retardant coating; can achieve a good waterproof effect by arranging the first waterproof coating and the second waterproof coating; can achieve a good compressive buffering effect by arranging the foamed polypropylene buffer layer, so it is beneficial to improve the overall performance of the cable, thereby making the cable less likely to be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] In the figure: 1. Conductor; 2. Fire-resistant mica tape; 3. First insulating sheath layer; 4. First waterproof coating; 5. Fiberglass cloth wrapping layer; 6. Shielding layer; 7. Foamed polypropylene buffer layer; 8. Second insulating sheath layer; 9. Armor layer; 10. Third insulating sheath layer; 11. Flame retardant coating; 12. Second waterproof coating; 13. Filling layer; 14. Reinforced core. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example

[0019] like Figure 1As shown, a novel low-smoke halogen-free flame-retardant power cable proposed in one embodiment of the utility model includes five conductors 1, the surfaces of the five conductors 1 are fixed with fire-resistant mica tapes 2, the surfaces of the fire-resistant mica tapes 2 are fixed with a first insulating sheath layer 3, the surfaces of the first insulating sheath layer 3 are fixed with a first waterproof coating 4, the surfaces of the five first waterproof coatings 4 are wrapped with a glass fiber cloth wrapping layer 5, a filling layer 13 is provided between the glass fiber cloth wrapping layer 5 and the five first waterproof coatings 4, a shielding layer 6 is fixed on the surface of the glass fiber cloth wrapping layer 5, a foamed polypropylene buffer layer 7 is fixed on the surface of the shielding layer 6, a second insulating sheath layer 8 is fixed on the surface of the foamed polypropylene buffer layer 7, an armor layer 9 is fixed on the surface of the second insulating sheath layer 8, a third insulating sheath layer 10 is fixed on the surface of the armor layer 9, a flame retardant coating 11 is fixed on the surface of the third insulating sheath layer 10, and a second waterproof coating 12 is fixed on the surface of the flame retardant coating 11; By arranging the fire-resistant mica tape 2, the glass fiber cloth wrapping layer 5 and the flame retardant coating 11, a good flame retardant effect can be achieved. By arranging the first waterproof coating 4 and the second waterproof coating 12, a dual waterproof effect can be achieved. By arranging the shielding layer 6, the electromagnetic interference can be shielded, which helps to ensure the normal operation of the circuit, especially in situations where the signal transmission requirements are high. By arranging the foamed polypropylene buffer layer 7, a better pressure buffering effect can be achieved, because the foamed polypropylene material has excellent buffering properties within a large load range and can effectively absorb and disperse impact force. By arranging the armor layer 9, the tensile strength and compressive strength of the cable can be enhanced, and the carrying capacity of the cable can be improved. When the cable is subjected to external force, the armor layer 9 can disperse and withstand these forces to prevent the cable from being broken or damaged due to external force. Therefore, the overall performance of the cable is relatively excellent, it is not easy to be damaged, and its service life is long.

[0020] In this embodiment, a reinforcing core 14 is provided at the center of the filling layer 13. The reinforcing core 14 is glass fiber reinforced plastic. Glass fiber reinforced plastic has high strength and corrosion resistance, and has certain flexibility. By providing the reinforcing core 14, the radial tensile strength of the cable can be improved, and the bending resistance of the cable can be enhanced. The filling layer 13 is a low-smoke halogen-free flame retardant rope. The low-smoke halogen-free flame retardant rope has excellent flame retardant properties and can effectively prevent the spread of fire in the event of a fire. The low-smoke halogen-free flame retardant rope does not contain toxic substances such as halogens and will not release harmful gases when burned. In addition, the low-smoke halogen-free flame retardant rope is lighter than other filling materials, which helps to reduce the overall weight of the cable and facilitates installation and maintenance.

[0021] In this embodiment, the first insulating sheath layer 3, the second insulating sheath layer 8 and the third insulating sheath layer 10 are all low-smoke halogen-free flame-retardant polyolefin sheaths. Because the low-smoke halogen-free flame-retardant polyolefin sheath has excellent flame retardant properties and good corrosion resistance, it can be used in strong corrosive media such as acids, alkalis, and salts without being affected by corrosion, and has high strength and wear resistance, and can withstand certain pressure and tension. This enables the cable to operate stably for a long time in a complex use environment and is not easily damaged. In addition, the low-smoke halogen-free flame-retardant polyolefin sheath does not contain harmful substances such as halogens and does not produce toxic gases when burned.

[0022] In this embodiment, the first waterproof coating 4 and the second waterproof coating 12 are both polyurea waterproof coating layers. Because polyurea waterproof coating has good waterproof performance, corrosion resistance and wear resistance, it can effectively resist erosion and damage from the external environment, and has high strength and high toughness, and can provide excellent mechanical protection for the cable.

[0023] In this embodiment, the flame retardant coating 11 is an expandable silicone flame retardant coating layer. Because the expandable silicone flame retardant coating has excellent flame retardant properties, it can expand rapidly during a fire to form a dense thermal insulation layer, effectively slowing down the spread of the fire. It also has good weather resistance and can resist the erosion of natural factors such as ultraviolet rays, wind and rain. It also has excellent adhesion and wear resistance, and can maintain the integrity and fire resistance of the coating for a long time.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A new type of low-smoke halogen-free flame-retardant power cable, comprising five conductors (1), characterized in that: The surfaces of the five conductors (1) are all fixed with fire-resistant mica tapes (2), the surfaces of the fire-resistant mica tapes (2) are all fixed with first insulating sheath layers (3), the surfaces of the first insulating sheath layers (3) are all fixed with first waterproof coating layers (4), the surfaces of the five first waterproof coating layers (4) are wrapped with glass fiber cloth wrapping layers (5), a filling layer (13) is provided between the glass fiber cloth wrapping layers (5) and the five first waterproof coating layers (4), a shielding layer (6) is fixed on the surface of the glass fiber cloth wrapping layers (5), a foamed polypropylene buffer layer (7) is fixed on the surface of the shielding layer (6), a second insulating sheath layer (8) is fixed on the surface of the foamed polypropylene buffer layer (7), an armor layer (9) is fixed on the surface of the second insulating sheath layer (8), a third insulating sheath layer (10) is fixed on the surface of the armor layer (9), a flame retardant coating (11) is fixed on the surface of the third insulating sheath layer (10), and a second waterproof coating (12) is fixed on the surface of the flame retardant coating (11).

2. The novel low-smoke halogen-free flame-retardant power cable according to claim 1, characterized in that: A reinforcing core (14) is provided at the center of the filling layer (13), and the filling layer (13) is a low-smoke, halogen-free, flame-retardant rope.

3. The novel low-smoke halogen-free flame-retardant power cable according to claim 1, characterized in that: The first insulating sheath layer (3), the second insulating sheath layer (8) and the third insulating sheath layer (10) are all low-smoke halogen-free flame-retardant polyolefin sheaths.

4. The novel low-smoke halogen-free flame-retardant power cable according to claim 1, characterized in that: The first waterproof coating (4) and the second waterproof coating (12) are both polyurea waterproof coating layers.

5. The novel low-smoke halogen-free flame-retardant power cable according to claim 1, characterized in that: The flame retardant coating (11) is an intumescent organic silicon flame retardant coating layer.

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