Flame-retardant fireproof power cable

Abstract

The utility model discloses a flame-retardant fireproof power cable, relates to the technical field of cable manufacturing, and solves the problems of insufficient structural strength, poor wear resistance and substandard flame-retardant fireproof performance of a power cable in the prior art. Comprising a wire core assembly and an outer sheath wrapping the outer wall of the wire core assembly. The cable further comprises a protection reinforcing assembly, the protection reinforcing assembly comprises an inner sheath, a reinforcing layer, a metal sheath and a fireproof layer which are arranged in the outer sheath, the inner sheath wraps the cable core assembly, and the reinforcing layer is arranged between the outer side of the inner sheath and the inner side of the metal sheath; according to the utility model, the protection reinforcing assembly is integrally designed in the outer sheath, and the protection reinforcing assembly comprises the inner sheath, the reinforcing layer, the metal sheath and the fireproof layer, so that the strength, the anti-pressure capability and the anti-bending capability of the cable are improved to a certain extent under the action of the reinforcing layer and the metal sheath, thereby prolonging the service life of the cable.

Description

Technical Field

[0001] This utility model belongs to the field of cable manufacturing technology, and in particular relates to a flame-retardant and fire-resistant power cable. Background Technology

[0002] Power cables are cable products used for transmitting and distributing electrical energy. They are widely used in power systems, industry, construction, transportation, and other fields, and mainly consist of a conductor (core), an insulating sheath, and a protective sheath. Power cables are an indispensable and important component of modern power systems, and their performance and quality directly affect the safe and stable operation of the power system. When selecting and using power cables, factors such as the system's voltage level, load current, and laying environment should be considered, comprehensively taking into account the cable's electrical, mechanical, thermal, and environmental performance to ensure the cable's reliability and economy. Simultaneously, strengthening cable operation monitoring and maintenance, promptly identifying and addressing defects, extending cable lifespan, and ensuring the safe operation of the power system are crucial.

[0003] Currently, existing power cables are protected by external sheaths. However, these cables still face some drawbacks, such as insufficient structural strength, poor abrasion resistance, and inadequate flame retardant and fire-resistant properties. These problems limit their service life, making it difficult for them to meet the stringent requirements of the current market.

[0004] In summary, existing power cables suffer from insufficient structural strength, poor wear resistance, and substandard flame retardant and fire-resistant properties. Utility Model Content

[0005] This invention provides a flame-retardant and fire-resistant power cable, which can solve the problems of insufficient structural strength, poor wear resistance, and substandard flame-retardant and fire-resistant performance of existing power cables.

[0006] To achieve the above objectives, according to an embodiment of the first aspect of this utility model, a flame-retardant and fire-resistant power cable is provided, comprising a core assembly and an outer sheath wrapped around the outer wall of the core assembly;

[0007] Also includes:

[0008] A protective and reinforcing assembly includes an inner sheath, a reinforcing layer, a metal sheath, and a fire-resistant layer disposed within an outer sheath. The inner sheath wraps around the outside of the core assembly. The reinforcing layer is disposed between the outer side of the inner sheath and the inner side of the metal sheath. The metal sheath is disposed between the outer side of the reinforcing layer and the inner side of the fire-resistant layer.

[0009] A further improvement is that the core assembly includes a set of conductors and a polypropylene insulating sleeve wrapped around each conductor.

[0010] A further improvement is that the reinforcing layer is an armored structure, which is one of steel strip, steel wire, and aluminum strip.

[0011] A further improvement is that the material of the refractory layer is one of mica tape or ceramicized silicone rubber.

[0012] A further improvement is that a protective coating layer is also provided, which includes a flame-retardant coating layer, an antioxidant coating layer, and a corrosion-resistant coating layer that are sequentially coated on the outside of the outer sheath.

[0013] A further improvement is that the flame-retardant coating layer is one of water-based acrylic fire-retardant coating or water-based polyurethane fire-retardant coating.

[0014] A further improvement is that the antioxidant coating layer is one of silicone coating, epoxy resin coating, and fluorocarbon coating.

[0015] A further improvement is that the corrosion-resistant coating layer is one of glass coating, ceramic coating, and silicone rubber coating.

[0016] A further improvement is that the protective reinforcement assembly also includes a polyethylene filler rope layer that fills the gap between the inner sheath and each polypropylene insulating sheath.

[0017] A further improvement is that the outer side of the polyethylene-filled rope layer is covered with a shielding layer, which is made of aluminum foil.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] (1) This utility model integrates a protective and reinforcing component inside the outer sheath. The protective and reinforcing component includes an inner sheath, a reinforcing layer, a metal sheath, and a fire-resistant layer. Through the action of the reinforcing layer and the metal sheath, the strength, compressive strength, and bending resistance of the cable are improved to a certain extent, thereby extending the service life of the cable.

[0020] (2) This utility model uses the fire-resistant layer and the protective coating layer together. This design can, to a certain extent, work with the fire-resistant layer to improve the flame retardant performance of the cable and reduce the damage to the cable caused by fire. At the same time, it can protect the cable from corrosion in the chemical environment. In addition, because glass fiber provides structural strength and heat resistance, and polyurethane has excellent elasticity and heat insulation performance, it can effectively prevent heat transfer and reduce thermal stress, thereby achieving the heat insulation protection of the cable, effectively avoiding damage to the cable at high temperature, thus slowing down the aging of the cable and further extending the service life of the cable. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a side view of the entire cable cross-section structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the protective coating layer on the outer sheath of this utility model.

[0024] Marked in the image:

[0025] 1. Core assembly; 11. Polypropylene insulation sleeve; 12. Conductor; 2. Outer sheath; 3. Protective reinforcement assembly; 31. Inner sheath; 32. Reinforcing layer; 33. Metal sheath; 34. Fire-resistant layer; 35. Polyethylene filler rope layer; 36. Protective coating layer; 361. Flame-retardant and fireproof coating layer; 362. Antioxidant coating layer; 363. Corrosion-resistant coating layer; 37. Shielding layer. Detailed Implementation

[0026] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] like Figures 1 to 3 As shown, a flame-retardant and fire-resistant power cable includes a core assembly 1 and an outer sheath 2 wrapped around the outer wall of the core assembly 1. The core assembly 1 includes a group of conductors 12 and a polypropylene insulating sleeve 11 wrapped around the outside of each conductor 12.

[0028] The protective reinforcement component 3 includes an inner sheath 31, a reinforcement layer 32, and a metal sheath 33 disposed within the outer sheath 2. The inner sheath 31 covers the outside of the core assembly 1. The reinforcement layer 32 is disposed between the outer side of the inner sheath 31 and the inner side of the metal sheath 33. The metal sheath 33 is disposed between the outer side of the reinforcement layer 32 and the inner side of the fire-resistant layer 34. Through the action of the reinforcement layer 32 and the metal sheath 33, the strength, compressive strength, and bending strength of the cable are improved to a certain extent, thereby extending the service life of the cable.

[0029] Specifically, the protective reinforcement component 3 also includes a polyethylene filler rope layer 35, which fills the gap between the inner sheath 31 and each polypropylene insulation sleeve 11. The design of the polyethylene filler rope layer 35 makes the internal structure of the cable more compact and prevents moisture and humidity from entering.

[0030] Specifically, the reinforcing layer 32 is an armored structure, which is one of steel strip, steel wire and aluminum strip;

[0031] It should be noted that if steel tape is chosen, this material can improve the cable's compressive strength; if steel wire is used, this material can improve the cable's tensile strength; and if aluminum tape is used, it can improve the cable's lightness and corrosion resistance. The installation should be carried out according to the requirements during manufacturing.

[0032] As a preferred embodiment, the outer side of the polyethylene-filled rope layer 35 is covered with a shielding layer 37, which is made of aluminum foil. This design can reduce the impact of external electromagnetic interference (EMI) on the signal, and is also lightweight and low in cost.

[0033] like Figure 2 and Figure 3 As shown in this embodiment, another implementation scheme is also provided, as detailed below:

[0034] A fire-resistant layer 34 is also provided, which is located on the inner side of the outer sheath 2 and the outer side of the reinforcing layer 32. The material of the fire-resistant layer 34 is one of mica tape and ceramicized silicone rubber.

[0035] The protective coating layer 36 includes a flame-retardant and fireproof coating layer 361, an antioxidant coating layer 362, and a corrosion-resistant coating layer 363, which are sequentially coated on the outside of the outer sheath 2.

[0036] Specifically, the flame-retardant and fireproof coating layer 361 is one of water-based acrylic fireproof coating and water-based polyurethane fireproof coating; the antioxidant coating layer 362 is one of organosilicon coating, epoxy resin coating and fluorocarbon coating; and the corrosion-resistant coating layer 363 is one of glass coating, ceramic coating and silicone rubber coating. This design can, to a certain extent, work in conjunction with the fire-resistant layer to improve the flame-retardant performance of the cable, reduce the damage to the cable from fire, and protect the cable from corrosion in a chemical environment, thereby slowing down the aging of the cable and further extending its service life.

[0037] like Figures 1 to 3 As shown in this embodiment, it should also be noted that the cable in the application document is manufactured using existing equipment and the manufacturing process is prior art. The working principle has been disclosed and is omitted in this embodiment. Furthermore, this application document only addresses the shortcomings of existing power cables, such as insufficient structural strength, poor wear resistance, and substandard flame retardant and fireproof performance, and does not involve other aspects. The working principle of this flame-retardant and fire-resistant power cable is described below:

[0038] This new design integrates a protective reinforcement component 3 within the outer sheath 2. The protective reinforcement component 3 includes an inner sheath 31, a reinforcement layer 32, a metal sheath 33, and a fire-resistant layer 34. Through the action of the reinforcement layer 32 and the metal sheath 33, the strength, compressive strength, and bending resistance of the cable are improved, thereby extending the service life of the cable.

[0039] Furthermore, by using the fire-resistant layer 34 and the protective coating layer 36 in combination, this design can, to a certain extent, work with the fire-resistant layer 34 to improve the flame-retardant performance of the cable, reduce the damage to the cable from fire, and protect the cable from corrosion in a chemical environment. Moreover, because glass fiber provides structural strength and heat resistance, and polyurethane has excellent elasticity and thermal insulation properties, it can effectively prevent heat transfer and reduce thermal stress, thereby achieving thermal insulation protection for the cable, effectively preventing damage to the cable at high temperatures, thus slowing down the aging of the cable and further extending the service life of the cable.

[0040] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.

Claims

1. A fire-retardant and fire-resistant power cable, comprising a core assembly (1) and an outer sheath (2) wrapped outside the core assembly (1); characterized in that Further comprising: a protective reinforcement assembly (3) comprising an inner sheath (31) arranged inside the outer sheath (2), a reinforcement layer (32), a metal sheath (33) and a fire-resistant layer (34), the inner sheath (31) being wrapped outside the core assembly (1), the reinforcement layer (32) being arranged between the outside of the inner sheath (31) and the inside of the metal sheath (33), and the metal sheath (33) being arranged between the outside of the reinforcement layer (32) and the inside of the fire-resistant layer (34).

2. A fire and flame resistant power cable according to claim 1, characterised in that, The core assembly (1) comprises a group of conductors (12) and a polypropylene insulation sleeve (11) wrapped outside each conductor (12).

3. A fire and flame resistant power cable according to claim 1, wherein, The reinforcement layer (32) is in a form of an armor structure, which is one of a steel belt, a steel wire and an aluminum belt.

4. A fire and flame resistant power cable according to claim 1, wherein, The fire-resistant layer (34) is made of one of a mica tape and a ceramicized silicone rubber.

5. A fire and flame resistant power cable according to claim 1, wherein, Further provided is a protective coating layer (36) comprising a fire-retardant and fire-resistant coating layer (361), an oxidation-resistant coating layer (362) and a corrosion-resistant coating layer (363) coated in sequence outside the outer sheath (2).

6. A fire and flame resistant power cable according to claim 5, characterised in that, The fire-retardant and fire-resistant coating layer (361) is one of a water-based acrylic fire-retardant coating and a water-based polyurethane fire-retardant coating.

7. A fire and flame resistant power cable according to claim 5, wherein, The oxidation-resistant coating layer (362) is one of a silicone coating, an epoxy resin coating and a fluorocarbon coating.

8. A fire and flame resistant power cable according to claim 5, wherein, The corrosion-resistant coating layer (363) is one of a glass coating, a ceramic coating and a silicone rubber coating.

9. A fire and flame resistant power cable according to claim 2, wherein, The protective reinforcement assembly (3) further comprises a polyethylene filling rope layer (35) filled in the gap between the inner sheath (31) and each polypropylene insulation sleeve (11).

10. A fire and flame resistant power cable according to claim 9, characterised in that, The outside of the polyethylene filling rope layer (35) is covered with a shielding layer (37) made of aluminum foil.

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