CN215988200U

CN215988200U - Novel low-smoke halogen-free flame-retardant fire-resistant power cable

Info

Publication number: CN215988200U
Application number: CN202122232448.4U
Authority: CN
Inventors: 席素玲; 徐磊; 李仲宏; 曾天良; 胡朝孙; 张怀广
Original assignee: Yangzhou Huacheng Cable Co Ltd
Current assignee: Yangzhou Huacheng Cable Co Ltd
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2022-03-08
Anticipated expiration: 2031-09-15

Abstract

The utility model discloses a novel low-smoke halogen-free flame-retardant fire-resistant power cable in the technical field of power cables, which comprises a central tube, wherein an inner cavity of the central tube is provided with a tensile wire, the outer wall of the central tube is fixedly connected with three groups of supporting bars which are arranged in an annular array, a cable core is arranged between two adjacent groups of supporting bars, the outer wall of the cable core is attached with an insulating layer, the outer wall of the insulating layer is attached with a phase separation layer, one end of each group of supporting bars, which is far away from the central tube, is provided with a same armor layer, filling layers are arranged among the phase separation layer, the supporting bars and the armor layer, the outer wall of the armor layer is attached with a flame-retardant layer, the outer wall of the flame-retardant layer is attached with a fire-resistant heat-insulating layer, and the outer wall of the fire-resistant heat-insulating layer is attached with an outer sheath. The service life of the power cable is prolonged.

Description

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

Technical Field

The utility model relates to the technical field of power cables, in particular to a novel low-smoke halogen-free flame-retardant fire-resistant power cable.

Background

The power cable is used for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater. The power cable can be divided into medium and low voltage power cables, high voltage cables, ultra high voltage cables and extra high voltage cables according to voltage grades. Further, the electric current system may be divided into an ac cable and a dc cable. The existing power cable has the problem of poor flame retardance, so that the economic loss caused by the fact that the power cable is on fire is large, meanwhile, the existing power cable has the problem of poor fire resistance and heat insulation, the service life of the power cable is shortened, and therefore the novel low-smoke halogen-free flame-retardant fire-resistant power cable is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel low-smoke halogen-free flame-retardant fire-resistant power cable, which aims to solve the problems of poor flame retardance and poor fire resistance and heat insulation of the conventional power cable in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: novel fire-retardant fire-resistant power cable of low smoke and zero halogen, including the center tube, the inner chamber of center tube is provided with tensile wire, the outer wall fixedly connected with three group's support bars of center tube, three groups the support bar is annular array and arranges, and is adjacent two sets of be provided with the cable core between the support bar, the outer wall laminating of cable core is provided with the insulating layer, the outer wall laminating of insulating layer is provided with the looks layer, three groups the support bar is kept away from the one end of center tube is provided with same armor, the looks layer the support bar and be provided with the filling layer between the armor three, the outer wall laminating of armor is provided with fire-retardant layer, fire-retardant layer's outer wall laminating is provided with fire-resistant insulating layer, fire-resistant insulating layer's outer wall laminating is provided with the oversheath.

Preferably, the phase separation layer sequentially comprises an inner phase separation shielding layer, a phase separation sheath and an outer phase separation shielding layer from inside to outside.

Preferably, the filling layer is an oxygen barrier layer.

Preferably, the flame-retardant layer sequentially comprises a halogen-free low-smoke flame-retardant polyolefin material layer and an asbestos flame-retardant layer from inside to outside.

Preferably, the fire-resistant heat-insulating layer sequentially comprises a fire-resistant mica tape wrapping layer and a ceramic fiber heat-insulating layer from inside to outside.

Preferably, the outer sheath is a polyurethane sheath.

Compared with the prior art, the utility model has the beneficial effects that:

1. the flame-retardant cable is provided with the flame-retardant layer, the halogen-free low-smoke flame-retardant polyolefin material layer plays a role in delaying fire, toxic smoke and high-concentration smoke are not easily generated, the asbestos flame-retardant layer plays a role in flame-retardant isolation of a fire source, the problem that the existing power cable is poor in flame retardance is solved, and economic loss is reduced.

2. The fireproof heat-insulating layer is arranged, the fireproof capability of the power cable is improved through the fireproof mica tape wrapping layer, the power cable is not easy to generate spontaneous combustion, the high-temperature heat-insulating capability of the power cable is improved through the ceramic fiber heat-insulating layer, heat transfer can be effectively prevented or slowed down, good heat resistance and heat preservation performance are provided in a limited space, the problem that the existing power cable is poor in fireproof heat insulation is solved, and the service life of the power cable is prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a phase-separated layer structure according to the present invention.

In the figure: 1. a central tube; 2. resisting the pulling wire; 3. a supporting strip; 4. a cable core; 5. an insulating layer; 6. phase separation layer; 601. an internal phase separation shielding layer; 602. a split-phase sheath; 603. an outer split-phase shielding layer; 7. a filling layer; 8. an armor layer; 9. a flame retardant layer; 10. a refractory thermal insulation layer; 11. an outer sheath.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

referring to fig. 1, the present invention provides a technical solution: novel fire-retardant fire-resistant power cable of low smoke and zero halogen, including center tube 1, the inner chamber of center tube 1 is provided with tensile line 2, and tensile line 2 improves power cable's tensile properties, and support bar 3 is organized to center tube 1's outer wall fixedly connected with, still plays the resistance to compression when support bar 3 plays antitorque commentaries on classics effect, and support bar 3 of three groups is the annular array and arranges, is provided with cable core 4 between adjacent two sets of support bar 3.

In this embodiment, referring to fig. 1, the outer wall of the cable core 4 is provided with the insulating layer 5, and the insulating layer 5 protects the cable core 4 from mechanical damage and chemical corrosion, does not contact water vapor to be damp, prevents the contact conductor from electric shock, and the like, and can enhance the mechanical strength and prolong the service life.

In this embodiment, referring to fig. 1 and fig. 2, the outer wall of the insulating layer 5 is provided with the phase splitting layer 6 in an attaching manner, the phase splitting layer 6 sequentially includes an inner phase splitting shielding layer 601, a phase splitting sheath 602, and an outer phase splitting shielding layer 603 from inside to outside, the inner phase splitting shielding layer 601 and the outer phase splitting shielding layer 603 play a role of double shielding for the cable core 4, and the phase splitting sheath 602 can prevent the outer phase splitting shielding layer 603 and the inner phase splitting shielding layer 601 from contacting with each other, thereby effectively suppressing superposition of higher harmonic components.

In this embodiment, please refer to fig. 1, one end of the three groups of support bars 3 away from the central tube 1 is provided with the same armor layer 8, and the armor layer 8 not only enhances the tensile strength, compressive strength and other mechanical protection extension service life, but also improves the anti-interference performance of the power cable through shielding protection.

In this embodiment, referring to fig. 1, a filling layer 7 is disposed between the phase separation layer 6, the supporting bars 3 and the armor layer 8, and the filling layer 7 is an oxygen isolation layer, which plays a role of isolating oxygen to prevent the cable core 4 from being corroded.

In this embodiment, please refer to fig. 1, a flame retardant layer 9 is attached to an outer wall of an armor layer 8, the flame retardant layer 9 sequentially includes a halogen-free low-smoke flame retardant polyolefin material layer and an asbestos flame retardant layer from inside to outside, the halogen-free low-smoke flame retardant polyolefin material layer plays a role in delaying fire, toxic smoke and high-concentration smoke are not easily generated, the asbestos flame retardant layer plays a role in flame-retardant isolation of a fire source, the problem of poor flame retardancy of the existing power cable is solved, and economic loss is reduced.

In this embodiment, please refer to fig. 1, the outer wall laminating of fire-retardant layer 9 is provided with fire-resistant insulating layer 10, fire-resistant insulating layer 10 includes fire-resistant mica tape around covering and ceramic fiber insulating layer from inside to outside in proper order, improve the fire-resistant ability of power cable around the covering through fire-resistant mica tape, make the condition of spontaneous combustion be difficult to appear in power cable, improve the thermal-insulated ability of power cable high temperature through the ceramic fiber insulating layer, can effectual prevention or slow down heat transfer, provide good heat resistance and heat insulating ability in limited space, the current relatively poor problem of fire-resistant thermal-insulated existence in power cable has been solved, power cable's life has been prolonged.

Example 2:

referring to fig. 1, this embodiment is different from the first embodiment in that: the outer wall of the fireproof heat insulation layer 10 is provided with an outer sheath 11 in a fitting manner, the outer sheath 11 is a polyurethane sheath, and the polyurethane sheath has excellent mechanical performance, can resist metal impact and cutting with high strength, has very high tensile strength, and can resist long-term repeated bending.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Novel fire-retardant fire-resistant power cable of low smoke and zero halogen, including center tube (1), its characterized in that: the inner cavity of the central tube (1) is provided with an anti-pulling wire (2), the outer wall of the central tube (1) is fixedly connected with three groups of supporting bars (3), three groups of supporting bars (3) are arranged in an annular array, a cable core (4) is arranged between two adjacent groups of supporting bars (3), the outer wall of the cable core (4) is laminated with an insulating layer (5), the outer wall of the insulating layer (5) is laminated with a phase separation layer (6), three groups of supporting bars (3) are far away from one end of the central tube (1) and provided with a same armor layer (8), a filling layer (7) is arranged among the phase separation layer (6), the supporting bars (3) and the armor layer (8), the outer wall of the armor layer (8) is laminated with a flame-retardant layer (9), the outer wall of the flame-retardant layer (9) is laminated with a fire-resistant heat-insulating layer (10), the outer wall of the fireproof heat insulation layer (10) is provided with an outer sheath (11) in an attaching mode.

2. The novel low-smoke halogen-free flame-retardant fire-resistant power cable according to claim 1, characterized in that: the phase separation layer (6) sequentially comprises an inner phase separation shielding layer (601), a phase separation sheath (602) and an outer phase separation shielding layer (603) from inside to outside.

3. The novel low-smoke halogen-free flame-retardant fire-resistant power cable according to claim 1, characterized in that: the filling layer (7) is an oxygen isolation layer.

4. The novel low-smoke halogen-free flame-retardant fire-resistant power cable according to claim 1, characterized in that: the flame-retardant layer (9) sequentially comprises a halogen-free low-smoke flame-retardant polyolefin material layer and an asbestos flame-retardant layer from inside to outside.

5. The novel low-smoke halogen-free flame-retardant fire-resistant power cable according to claim 1, characterized in that: the fire-resistant heat-insulating layer (10) comprises a fire-resistant mica tape wrapping layer and a ceramic fiber heat-insulating layer from inside to outside in sequence.

6. The novel low-smoke halogen-free flame-retardant fire-resistant power cable according to claim 1, characterized in that: the outer sheath (11) is a polyurethane sheath.