Long-life fireproof halogen-free low-smoke cable

Abstract

The long-life fireproof halogen-free low-smoke cable comprises an outer sheath, a waterproof layer is arranged on the inner side of the outer sheath, a buffer layer is arranged on the inner side of the waterproof layer, a reinforced metal wire layer is arranged on the inner side of the buffer layer, and flame-retardant filler is arranged on the inner side of the reinforced metal wire layer. The main cable core is installed in the flame-retardant filler, a plurality of auxiliary cable cores are arranged outside the main cable core, the outer walls of the auxiliary cable cores and the main cable core are connected with inner sheaths, and elastic balls are arranged between the inner sheaths; anti-abrasion particles are arranged on the outer wall of the anti-abrasion sleeve. Compared with an existing device, the long-service-life fireproof halogen-free low-smoke cable has the advantages that the outer sheath can be protected through the anti-abrasion sleeve, the anti-abrasion particles can be in direct contact with the ground, the anti-abrasion sleeve can be directly blocked from the ground, and the anti-abrasion effect of the outer sheath is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a long-life fireproof halogen-free low-smoke cable. Background Art

[0002] Cable is an electrical energy or signal transmission device, usually composed of several or several groups of wires. Low-smoke halogen-free cable is a type of cable. It refers to the insulation layer material of the wire made of halogen substances. When burned, it does not release halogen-containing gas and the smoke concentration is low. Therefore, a long-life fire-resistant halogen-free low-smoke cable is required.

[0003] The Chinese patent with the authorization publication number CN215298932U discloses a low-smoke halogen-free cable, comprising: three cable conductors that are tangential to each other and are wrapped with a binding layer to form a conductor core with a circular cross-section; a fire-retardant filling layer, which is filled between the binding layer and the cable conductor; and a thermal insulation layer, a fire-resistant and flame-retardant layer, a water-blocking layer and an outer sheath arranged in sequence on the outside of the conductor core; wherein the thermal insulation layer is wrapped around the outside of the conductor core and is used to block thermal radiation, and the fire-resistant and flame-retardant layer includes an expandable graphite tape wrapped around the outside of the thermal insulation layer; a structural layer that prevents the spread of flames and isolates heat is provided on the outside of the conductor core of the low-smoke halogen-free cable, so that a thermal insulation and fire-retardant structure is formed on the outside of the conductor core, which can bind the internal wires and isolate them from the external environment when a fire occurs, so as to avoid the fire from becoming larger due to the spread of the wires and igniting other combustibles, and can extend the service life of the conductor core in a high temperature and open flame environment.

[0004] Although the low-smoke halogen-free cable mentioned above can bind the internal wires and isolate them from the external environment when a fire occurs, so as to prevent the fire from spreading and igniting other combustibles, the cable lacks anti-wear and buffer structures. Usually, its outer protective sheath will be directly dragged on the ground and inevitably stepped on by people, which can easily cause the outer sheath to crack and shorten the service life of the cable. For this reason, we propose a long-life fire-resistant halogen-free low-smoke cable. Utility Model Content

[0005] The purpose of the present utility model is to provide a long-life fire-resistant halogen-free low-smoke cable to solve the problem raised in the above-mentioned background technology that due to the lack of anti-wear and buffer structure of the cable, its outer protective sheath is usually dragged directly on the ground and is inevitably stepped on by people, which easily causes the outer sheath to crack and shortens the service life of the cable.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a long-life fire-resistant halogen-free low-smoke cable, comprising:

[0007] An outer sheath, wherein a waterproof layer is provided on the inner side of the outer sheath, a buffer layer is provided on the inner side of the waterproof layer, a reinforcing metal wire layer is provided on the inner side of the buffer layer, and a flame retardant filler is provided on the inner side of the reinforcing metal wire layer;

[0008] A main cable core is installed inside the flame-retardant filler, and a plurality of auxiliary cable cores are arranged outside the main cable core. The outer walls of the auxiliary cable cores and the main cable core are connected to inner sheaths, and elastic balls are arranged between the inner sheaths;

[0009] The anti-wear sleeve is installed below the outer side of the outer sheath, and the outer wall of the anti-wear sleeve is provided with anti-wear particles.

[0010] Preferably, the secondary cable cores are evenly distributed along the outside of the main cable core, and the inner sheath is respectively fitted with the secondary cable cores and the main cable core.

[0011] Preferably, the inner sheath and the outer sheath are both made of halogen-free, low-smoke, flame-retardant polyolefin fire-resistant material, and the flame-retardant filler is alkali-free glass fiber.

[0012] Preferably, the auxiliary cable core is connected to the elastic ball through the inner sheath, and the elastic ball forms an elastic structure between the inner sheaths, and the buffer layer is made of elastic rubber.

[0013] Preferably, the reinforcing metal wire layer is a hollow mesh structure, and the reinforcing metal wire layer is in contact with the buffer layer.

[0014] Preferably, a semi-enclosed structure is formed between the anti-wear sleeve and the outer protective sleeve, and the anti-wear particles are evenly distributed along the outer wall of the anti-wear sleeve.

[0015] Preferably, the anti-wear sleeve is further provided with:

[0016] Breathable grooves are provided in the anti-wear sleeve and are evenly distributed between the breathable grooves. A hook is provided above the outer sleeve, and a lifting cross bar is passed through the hook, and the lifting cross bar is detachably connected to the hook.

[0017] Compared with the existing technology, the utility model provides a long-life fire-resistant halogen-free low-smoke cable with the following beneficial effects:

[0018] The utility model can generate better elasticity between the auxiliary cable cores through the elastic balls, thereby reducing damage to the cable core when the cable is squeezed, and at the same time the buffer layer can reduce the damage to the inside of the cable caused by gravity, and the anti-wear sleeve can protect the outer sheath, and the anti-wear particles can directly contact the ground, directly blocking the anti-wear sleeve from the ground, thereby improving the anti-wear effect of the outer sheath and avoiding the problem that the cable lacks anti-wear and buffer structure. Usually, the outer protective sleeve will be directly dragged on the ground and inevitably stepped on by people, which can easily cause the outer skin to crack, thereby affecting the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the external structure of the utility model, which shows the structure of the sheath, waterproof layer, buffer layer and reinforcing metal wire layer;

[0021] Figure 3 This is a schematic diagram of the external structure of the utility model.

[0022] In the figure: 1. Outer sheath; 2. Waterproof layer; 3. Buffer layer; 4. Reinforced metal wire layer; 5. Main cable core; 6. Auxiliary cable core; 7. Inner sheath; 8. Elastic ball; 9. Flame retardant filler; 10. Anti-wear sleeve; 11. Anti-wear particles; 12. Breathable groove; 13. Hook; 14. Lifting crossbar. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-2, a long-life fire-resistant halogen-free low-smoke cable, comprising: an outer sheath 1, a waterproof layer 2 is provided on the inner side of the outer sheath 1, and a buffer layer 3 is provided on the inner side of the waterproof layer 2, a reinforcing metal wire layer 4 is provided on the inner side of the buffer layer 3, and a flame retardant filler 9 is provided on the inner side of the reinforcing metal wire layer 4; the reinforcing metal wire layer 4 is a hollow mesh structure, and the reinforcing metal wire layer 4 is in contact with the buffer layer 3; the reinforcing metal wire layer 4 can improve the integrity of the cable and prevent the buffer layer 3 from cracking and breaking; a main cable core 5, which is installed inside the flame retardant filler 9, a plurality of auxiliary cable cores 6 are provided on the outside of the main cable core 5, and the outer walls of the auxiliary cable cores 6 and the main cable core 5 are connected with an inner sheath 7, the auxiliary cable cores 6 are evenly distributed along the outside of the main cable core 5, and the inner sheath 7 is respectively in contact with the auxiliary cable core 6 and the main cable core 5; the inner sheath 7 can It can respectively serve as a protective structure for the auxiliary cable core 6 and the main cable core 5, and can also achieve the effect of halogen-free and low smoke; the inner sheath 7 and the outer sheath 1 are both made of halogen-free and low smoke flame-retardant polyolefin fire-resistant material, and the flame retardant filler 9 is alkali-free glass fiber; the flame retardant filler 9 made of alkali-free glass fiber can achieve a flame retardant effect, and at the same time can separate the auxiliary cable core 6 and the main cable core 5 to prevent one cluster of wires from burning quickly and affecting the rest of the wires; elastic balls 8 are arranged between the inner sheaths 7; the auxiliary cable core 6 is connected to the elastic balls 8 through the inner sheath 7, and an elastic structure is formed between the inner sheaths 7 through the elastic balls 8, and the buffer layer 3 is made of elastic rubber material; the elastic balls 8 can make the auxiliary cable cores 6 have better elasticity, thereby reducing the damage to the cable core when the cable is squeezed, and the buffer layer 3 can reduce the damage to the inside of the cable caused by gravity.

[0025] See also Figure 1 and 3 , a long-life fire-resistant halogen-free low-smoke cable, comprising: an anti-wear sleeve 10, which is installed at the lower side of the outer side of the outer sheath 1, and the outer wall of the anti-wear sleeve 10 is provided with anti-wear particles 11; the anti-wear sleeve 10 and the outer sheath 1 form a semi-enclosed structure, and the anti-wear particles 11 are evenly distributed along the outer wall of the anti-wear sleeve 10; the anti-wear sleeve 10 can play a protective effect on the outer sheath 1, and the anti-wear particles 11 can directly contact the ground, thereby directly isolating the anti-wear sleeve 10 from the ground, thereby improving the anti-wear effect of the outer sheath 1; a ventilation groove 12 is opened in the anti-wear sleeve 10, and the ventilation grooves 12 are evenly distributed. A hook 13 is provided above the outer sheath 1, and a lifting cross bar 14 is passed through the hook 13, and the lifting cross bar 14 is detachably connected to the hook 13; the ventilation groove 12 can improve the air permeability of the anti-wear sleeve 10, and the mutual cooperation between the hook 13 and the lifting cross bar 14 can facilitate the lifting and installation of the cable.

[0026] Working principle: When using this long-life fire-resistant halogen-free low-smoke cable, first, when the cable needs to be installed at a high place, pass the lifting crossbar 14 through the hook 13, and then fix the lifting crossbar 14 in the required position. If the cable does not need to be installed at a high place, place it directly on the ground. The anti-wear sleeve 10 can protect the outer sheath 1. The anti-wear particles 11 can directly contact the ground, directly blocking the anti-wear sleeve 10 from the ground, thereby improving the anti-wear effect of the outer sheath 1. At the same time, the breathable groove 12 can improve the air permeability of the anti-wear sleeve 10, and the inner sheath 7 can serve as a protective structure for the auxiliary cable core 6 and the main cable core 5. At the same time, it can achieve the effect of halogen-free and low smoke. The flame retardant filler 9 made of alkali-free glass fiber can achieve flame retardant effect. At the same time, it can separate the auxiliary cable core 6 and the main cable core 5 to prevent the burning of one cluster of wires from quickly affecting the remaining wires. When the cable is squeezed, the buffer layer 3 can reduce the damage to the inside of the cable caused by gravity. At the same time, the elastic ball 8 can make the auxiliary cable core 6 have better elasticity, thereby reducing the damage to the cable core. The strengthened metal wire layer 4 improves the integrity of the cable and prevents the buffer layer 3 from cracking and breaking. The waterproof layer 2 can prevent external water vapor from entering the cable. This is the working principle of the long-life fire-resistant halogen-free and low-smoke cable.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A long-life fire-resistant halogen-free low-smoke cable, characterized in that: include: An outer sheath (1), wherein a waterproof layer (2) is arranged on the inner side of the outer sheath (1), a buffer layer (3) is arranged on the inner side of the waterproof layer (2), a reinforcing metal wire layer (4) is arranged on the inner side of the buffer layer (3), and a flame retardant filler (9) is arranged on the inner side of the reinforcing metal wire layer (4); A main cable core (5) is installed inside the flame-retardant filler (9), a plurality of auxiliary cable cores (6) are arranged outside the main cable core (5), and the outer walls of the auxiliary cable cores (6) and the main cable core (5) are both connected with inner sheaths (7), and elastic balls (8) are arranged between the inner sheaths (7); An anti-wear sleeve (10) is installed below the outer side of the outer protective sleeve (1), and an outer wall of the anti-wear sleeve (10) is provided with anti-wear particles (11).

2. A long-life fire-resistant halogen-free low-smoke cable according to claim 1, characterized in that: The auxiliary cable cores (6) are evenly distributed along the outside of the main cable core (5), and the inner sheath (7) is respectively fitted with the auxiliary cable cores (6) and the main cable core (5).

3. The long-life fire-resistant halogen-free low-smoke cable according to claim 1, characterized in that: The inner sheath (7) and the outer sheath (1) are both made of halogen-free, low-smoke, flame-retardant polyolefin fire-resistant material, and the flame-retardant filler (9) is alkali-free glass fiber.

4. The long-life fire-resistant halogen-free low-smoke cable according to claim 1, characterized in that: The auxiliary cable core (6) is connected to the elastic ball (8) via the inner sheath (7), and an elastic structure is formed between the inner sheaths (7) via the elastic ball (8), and the buffer layer (3) is made of elastic rubber material.

5. The long-life fire-resistant halogen-free low-smoke cable according to claim 1, characterized in that: The reinforcing metal wire layer (4) is a hollow mesh structure, and the reinforcing metal wire layer (4) is in contact with the buffer layer (3).

6. The long-life fire-resistant halogen-free low-smoke cable according to claim 1, characterized in that: A semi-enclosed structure is formed between the anti-wear sleeve (10) and the outer protective sleeve (1), and the anti-wear particles (11) are evenly distributed along the outer wall of the anti-wear sleeve (10).

7. The long-life fire-resistant halogen-free low-smoke cable according to claim 1, characterized in that: The anti-wear sleeve (10) is also provided with: A vent groove (12) is provided in the anti-wear sleeve (10), and the vent grooves (12) are evenly distributed. A hook (13) is provided above the outer sleeve (1), and a hoisting cross bar (14) is inserted in the hook (13), and the hoisting cross bar (14) and the hook (13) are detachably connected.

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