CN205318867U - Urban rail transit is with there not being fire -retardant fire -resistant accuse combined braided shielded flexible cable that moves of steamed low cigarette - Google Patents

Abstract

The utility model provides a halogen-free, low-smoke, flame-retardant, fire-resistant, dynamic-control composite braided shielded soft cable for urban rail transit, which includes a DC power cable core and at least two control wire cores. The control wire cores include control wire core conductors and control wires. Core insulation, the control wire cores are concentrically twisted outside the DC power cable core to form the control wire core layer; the DC power cable core includes the DC power cable conductor, the extruded DC power cable insulation, and the extruded first layer from the inside to the outside. A fire-resistant inner sheath layer; the control line core layer includes the first flame-retardant tape wrapped around it, the aluminum-plastic composite tape wrapped vertically, the second fire-resistant inner sheath layer extruded, copper wire braided and coated Covered with flame retardant material layer and extruded outer sheath layer; this kind of cable has high insulation performance, flame retardant class A, low smoke and halogen free, fire resistance, waterproof, anti-rat and termite, anti-ultraviolet, anti-electric field interference, It has good flexibility, good bending performance, compact structure, and realizes the functions of power transmission, control, signal, protection and measurement.

Description

A kind of halogen-free low-smoke flame-retardant fire-resistant dynamic control composite braided shielded flexible cable for urban rail transit

technical field

The utility model patent relates to the field of cable technology, specifically, it mainly relates to a halogen-free low-smoke flame-retardant fire-resistant dynamic control composite braided shielded flexible cable for urban rail transit.

Background technique

Urban rail transit is currently the main measure to improve the traffic environment in major international cities. Due to the particularity of rail transit, it has extremely high requirements for the safety and reliability of the power system. However, the laying environment of subway and light rail cables is complicated, and the existing technical products often cannot meet the various stringent requirements of laying at the same time; the use environment of cables for urban light rail subways is mostly densely populated underground. Escape and firefighting work posed great difficulties. Therefore, the requirements for flame retardancy are high, and the flame retardancy must meet the requirements of Class A in GB/T18380.3. At the same time, the release of smoke and toxic gases during combustion will hinder the fire-fighting work, and the acid gas will cause harm to people and equipment, so there are also high requirements for the release of smoke and toxic gases during combustion; cables for urban light rail and subway Due to environmental and meteorological factors, the cable may be laid in a humid environment for a long time, water molecules may soak into the cable, penetrate into the interior of the cable, be absorbed by the insulation, cause a decline in electrical performance, and cause oxidation of the conductor. Corrosion not only affects the electrical performance of the cable, but also causes abnormal disconnection accidents in severe cases. The cable must have a waterproof function; cables for urban light rail and subways are laid underground for a long time, and are vulnerable to small animals (such as rodents and ants). Affect the performance of the cable, the cable should have the function of anti-rat and anti-ant; if the cable for urban light rail subway is not used in the subway, but laid on the elevated light rail, it may withstand the test of sunlight and various weather conditions for a long time. The sheath of the cable is exposed to sunlight for a long time, and it is prone to color fading, degradation of mechanical and physical properties, and even cracking. The cable should have an anti-ultraviolet function; the space for laying cables for urban light rail and subway is limited. On the one hand, DC cables are required to be lightweight, flexible, and The turning radius is small. On the other hand, there are many types and quantities of cables laid in the laying pipeline, and the cables need to be small in diameter and easy to lay. In addition to a large number of power cables, urban light rail subways also need to use a large number of control, signal, protection and measurement cables. In the prior art, due to the consideration of the factors that interfere with the electric field, the power cables and the control, signal, protection and measurement cables are often processed and laid separately, which not only brings difficulties to the construction, but also increases the use and construction costs; , Protection and measurement cables have small core diameters and low tensile strength, and are easily scratched or broken during laying.

Utility model content

The purpose of this utility model is to provide a high insulation performance, flame retardant grade A, low-smoke and halogen-free, fire-resistant, waterproof, anti-rat and ant-proof, anti-ultraviolet, anti-electric field interference, good flexibility, good bending performance, It is a non-halogen, low-smoke, flame-retardant, fire-resistant, dynamic-control composite braided shielded flexible cable for urban rail transit that is compact in structure and functions at the same time as transmission of electric energy, control, signal, protection and measurement.

The utility model relates to a halogen-free, low-smoke, flame-retardant, fire-resistant, dynamic-control composite braided shielded flexible cable for urban rail transit, which includes a DC power cable core and at least two control wire cores. The control wire core includes a control wire core conductor, mica tape or control wire core insulation, and the control wire core is concentrically twisted outside the DC power cable core to form a control wire core layer; the DC power cable core is sequentially arranged from the inside to the outside It includes a DC power cable conductor, extruded DC power cable insulation, and an extruded first fire-resistant inner sheath layer; the control line core layer includes a wrapped first flame-retardant tape from the inside to the outside, and a longitudinally wrapped Aluminum-plastic composite tape, extruded second fire-resistant inner sheath layer, braided copper wire + coated flame-retardant material layer, extruded outer sheath layer.

As a further improvement, flame-retardant and refractory filling ropes are filled between the control wire cores.

As a further improvement, the conductor of the control core is wrapped with mica tape or the insulation of the control core is ceramicized silicon rubber insulation.

As a further improvement, the first flame retardant tape and the second flame retardant tape are alkali-free glass fiber tapes or ceramic silicon rubber tapes, preferably ceramic silicon rubber tapes.

As a further improvement, the flame-retardant and refractory filling rope is an alkali-free glass rope or a vitrified silicone rubber filling strip, preferably an alkali-free glass rope.

As a further improvement, the first refractory inner sheath layer is a vitrified silicone rubber inner sheath layer.

As a further improvement, the second refractory inner sheath layer is a vitrified silicone rubber inner sheath layer.

As a further improvement, the copper wire weaving+coated flame-retardant material layer, the coated flame-retardant material is a vitrified silicone rubber coating material.

As a further improvement, the outer sheath layer is a low-smoke, halogen-free, flame-retardant sheath material.

Compared with the prior art by adopting the above technical scheme, the utility model has the following technical effects:

(1) It has high insulation performance. Compared with the low-smoke, no-halogen (low) halogen flame-retardant cross-linked polyolefin insulation used in the prior art, the electrical performance indicators such as the insulation resistance constant and volume resistivity of the cable will not decrease. High insulation performance is maintained.

(2) Flame-retardant class A, fire-resistant, multi-layer non-alkali glass fiber tape or ceramic silicon rubber tape, multi-layer ceramic silicon rubber inner sheath, non-alkali glass silk rope or ceramic silicon rubber filling strip, flame-retardant coating The combined structure of the material layer enables the cable to meet the requirements of flame retardant class A. In the class A burning test, the length of the carbonized part of the sheath surface can meet the requirements of the national standard. Ceramic silicone rubber belt, ceramic silicone rubber inner sheath, ceramic silicone rubber filling strip, and coating flame retardant material layer are also very good in encrustation. After flame combustion, the precipitated water is transformed into infusible and non-combustible silicon oxide. The hard shell package prevents the flame from entering the insulation, and also isolates the insulation from contact with external oxygen, so that the fire can be controlled. E-glass fiber tapes and E-glass ropes are made of E-glass yarns and twisted into strands. They are flame-retardant and fire-resistant, and have high tensile strength, high electrical insulation performance, and good chemical stability. and heat resistance, and low hygroscopicity.

(3) The first fire-resistant inner sheath layer, the second fire-resistant inner sheath layer, the outer sheath layer, the multi-layer flame-retardant tape, and the braided non-alkali glass wire are all low-smoke and halogen-free materials. The light transmittance, halogen acid gas release, pH value, and electrical conductivity all meet the standard requirements and have a large margin. The light transmittance of the cable material and the cable smoke density test is less than 60% when it is burned. The release amount of halogen acid gas is less than 5mg/g, the water-soluble pH value of the gas released when the material from the cable is burned is greater than 4.3, and the conductivity of the aqueous solution is less than 10μs/mm.

(4) Waterproof, double-layer sheath, longitudinally wrapped aluminum-plastic composite tape can increase radial waterproofness, and the non-alkali glass wire rope has low hygroscopicity, which can play a longitudinal waterproof role.

(5) Anti-rodent and anti-termite, adding capsaicin to the sheath material, using capsaicin as an anti-termite agent, can strongly stimulate the oral mucosa and olfactory nerves of rodents and dislike chewing and cutting, and at the same time kill termites , has dual functions, non-toxic, environmental protection, pollution-free, high content of active ingredients, small amount of addition, and long validity period.

(6) Anti-ultraviolet, the outer sheath is made of materials with anti-ultraviolet properties or additives such as UV-resistant absorbers are added to the sheath material to improve the performance of the material, which can withstand the test of sunlight and various weather conditions for a long time. The sheath is exposed to sunlight for a long time, and there will be no color fading, mechanical and physical performance degradation or even cracking.

(7) Anti-electric field interference, the longitudinally wrapped aluminum-plastic composite tape and the braided copper wire can play a shielding role, enabling the DC cable and the control cable to work synchronously without interfering with the electric field.

(8) Good flexibility and good bending performance. The conductor adopts class 5 conductors which are softer than class 2 conductors. The insulation adopts ethylene-propylene insulation which is softer than cross-linked polyethylene insulation. The braided shielding structure is also softer than the wrapping structure , good bending performance, very small bending radius and shock resistance, can be used in places with strict turning radius requirements.

(9) The structure is compact, the control wire core and the power wire core are concentric structures, and the outer diameter is small.

(10) At the same time, it plays the role of transmission of electric energy and control, signal, protection and measurement. The DC power cable core transmits and distributes electric energy in the power line. The control cable core transmits signals or control operations between the control center and the system, or is used for protection and measurement. The DC power cable core and the control cable core are combined together, which not only saves materials and production costs, but also can be constructed at the same time, reducing the number of construction times and construction costs. It also avoids the problem that the small control cable cores are easily damaged during construction due to the narrow space for cable laying.

Description of drawings

The utility model will be further described below in conjunction with accompanying drawing:

Fig. 1 is the structural representation of the utility model;

Among them, 1. Control core conductor, 2. Control core insulation, 3. DC power cable conductor, 4. DC power cable insulation, 5. The first fire-resistant inner sheath layer, 6. Flame-retardant filling rope, 7. The first 1. Flame-retardant belt, 8. Aluminum-plastic composite belt wrapped vertically, 9. Second fire-resistant inner sheath layer, 10. Copper wire braided and coated flame-retardant material layer, 11. Outer sheath layer.

detailed description

The utility model provides a halogen-free, low-smoke, flame-retardant, fire-resistant, dynamic-control composite braided shielded flexible cable for urban rail transit. Novel further details. It should be understood that the specific implementation described here is only used to explain the utility model, and is not intended to limit the utility model.

As shown in Figure 1, the halogen-free, low-smoke, flame-retardant, fire-resistant, motion-controlled composite braided shielded flexible cable for urban rail transit provided by the utility model includes a DC power cable core and at least two control wire cores. The control wire core includes a control wire core conductor 1, a mica tape or a control wire core insulation 2, and the control wire core is concentrically twisted outside the DC power cable core to form a control wire core layer; the DC power cable core is from the inside to the The outside includes a DC power cable conductor 3, an extruded DC power cable insulation 4, and an extruded first fire-resistant inner sheath layer 5; Belt 7, longitudinally wrapped aluminum-plastic composite belt 8, extruded second fire-resistant inner sheath layer 9, copper wire braided and coated flame-retardant material layer 10, extruded outer sheath layer 11.

Among them, the control line cores are filled with flame-retardant and fire-resistant filling ropes 6, and the control line core conductor 1 is wrapped with mica tape or the control line core insulation is ceramic silicon rubber insulation; the first fire-retardant tape 7 is an alkali-free glass fiber tape Or ceramic silicone rubber belt, preferably ceramic silicone rubber belt; flame-retardant filling rope 6 is alkali-free glass silk rope or ceramic silicon rubber filling strip, preferably alkali-free glass silk rope; the first fire-resistant inner sheath layer 5, the second The second refractory inner sheath layer 9 is a vitrified silicone rubber inner sheath; in the copper wire weaving and coating flame retardant material layer 10, the coating flame retardant material is a vitrified silicone rubber coating material; the outer sheath layer 11 is a low Smoke-free halogen-free flame-retardant sheath material, low-smoke halogen-free flame-retardant polyolefin material is preferred, materials with UV protection properties are preferred, or additives such as UV-resistant absorbers are added to the sheath material to improve the performance of the material. It is preferred to add capsaicin to the sheath material as an anti-termite agent.

The conductors used in the utility model are bare annealed copper conductors or metal-plated annealed soft copper conductors commonly used in cables in accordance with GB/T3956-2008, including tight-pressed multi-strand hard round copper wires to form two types of conductors or non-pressed For category 5 conductors composed of multi-strand soft round copper wires, tinned category 5 conductors with a core diameter of less than 0.5mm are preferred.

The insulation is cross-linked polyethylene or ethylene propylene rubber, preferably ethylene propylene rubber.

The utility model provides a halogen-free, low-smoke, flame-retardant, fire-resistant and dynamic control composite flexible cable for urban rail transit. The above is only a preferred implementation method of the utility model. , under the premise of not departing from the principle of the utility model, some improvements can also be made, and these improvements should also be regarded as the protection scope of the utility model.

Claims (9)

1. the composite braided shielded flexible cable of the fire-resistant moving control of LSOH anti-flaming for urban track traffic, comprise insulation DC electric cable cable core and at least two control cores, it is characterized in that, described control core comprises control line core conductor and mica tape or control line core insulation, controls core concentric stranding and forms control line sandwich layer outward at insulation DC electric cable cable core; The insulation DC electric cable insulation that described insulation DC electric cable cable core comprises insulation DC electric cable conductor from inside to outside successively, extrude, the first fire-resistant inner restrictive coating extruding; Described control line sandwich layer comprises the first wrapped inhibiting tape, the aluminium-plastic tape of vertical bag, the external sheath layer that extrudes the second fire-resistant inner restrictive coating, proof copper-wire braided and coating fire proofing layer, extrudes outward from inside to outside successively.

2. a kind of urban track traffic composite braided shielded flexible cable of the fire-resistant moving control of LSOH anti-flaming according to claim 1, is characterized in that, between described control core, is filled with flame-retardant gasket for packing.

3. a kind of urban track traffic composite braided shielded flexible cable of the fire-resistant moving control of LSOH anti-flaming according to claim 1, it is characterized in that, described control line core conductor is surrounded with mica tape or control line core insulation outward, and described control line core insulation is ceramic silicon rubber insulation.

4. a kind of urban track traffic composite braided shielded flexible cable of the fire-resistant moving control of LSOH anti-flaming according to claim 1, is characterized in that, described the first inhibiting tape is alkali-free glass fibre band or ceramic silicone rubber belt.

5. a kind of urban track traffic composite braided shielded flexible cable of the fire-resistant moving control of LSOH anti-flaming according to claim 2, is characterized in that, described flame-retardant gasket for packing is alkali-free glass wool rope or ceramic silicon rubber filling bar.

6. a kind of urban track traffic composite braided shielded flexible cable of the fire-resistant moving control of LSOH anti-flaming according to claim 1, is characterized in that, the first described fire-resistant inner restrictive coating is ceramic silicon rubber sheath.

7. a kind of urban track traffic composite braided shielded flexible cable of the fire-resistant moving control of LSOH anti-flaming according to claim 1, is characterized in that, the second described fire-resistant inner restrictive coating is ceramic silicon rubber sheath.

8. a kind of urban track traffic composite braided shielded flexible cable of the fire-resistant moving control of LSOH anti-flaming according to claim 1, is characterized in that, in described proof copper-wire braided and coating fire proofing layer, applying fire proofing is ceramic Silicone Rubber Coated material.

9. a kind of urban track traffic composite braided shielded flexible cable of the fire-resistant moving control of LSOH anti-flaming according to claim 1, is characterized in that, described external sheath layer is low-smoke halogen-free flame-retardant sheath material.