High-safety flame-retardant cable for rail transit

Abstract

The utility model discloses a high-safety flame-retardant cable for rail transit, which comprises a cable core, the cable core comprises a wire core and a filling layer, a belting layer is arranged outside the cable core, a lining layer is arranged outside the belting layer, the lining layer and the belting layer are formed through extrusion, a composite flame-retardant layer is arranged outside the lining layer, and the composite flame-retardant layer is arranged outside the composite flame-retardant layer. A composite flame-retardant layer is arranged outside the inner lining layer, a compression-resistant layer is arranged outside the composite flame-retardant layer, an armor layer is arranged outside the compression-resistant layer, the composite flame-retardant layer, the compression-resistant layer and the armor layer are sequentially attached outside the inner lining layer, an outer sheath is arranged outside the armor layer, and the outer sheath and the armor layer are formed through extrusion. The internal flame-retardant structure of the rail transit cable adopts the composite layer, and the composite structure increases the flame-retardant performance, so that the cable can be normally used for a long time in a high-temperature combustion state, the inner core of the cable is effectively protected, and the use effect of the cable is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field, concretely is a high safe flame -retardant cable for rail transit. BACKGROUND

[0002] Rail transit refers to a kind of traffic tool or transport system, which needs to drive on specific track, cable is made of one or more mutually insulated conductors and outer insulation protective layer, is laid in underground, air, etc., cable is generally composed of conductor, insulation layer, protective layer three parts.Flame-retardant cable is a kind of cable with special performance, under specified test conditions, sample is burned, after removing test fire source, the spread of flame is only in limited range, and residual flame or residual burning can be self-extinguished within limited time, compared with ordinary cable, the insulation and sheath material of flame-retardant cable is higher, flame-retardant cable can limit combustion in local range, so as not to spread, thereby saving other equipment, avoid causing greater loss.

[0003] The utility model discloses a kind of high safe flame-retardant cables for rail transit, it is related to flame-retardant cable field, including: rail flame-retardant cable, the copper conductor is wrapped by outer protective layer, the outer protective layer inner side is provided with flame-retardant filling layer, two layers of flame-retardant glass fiber tape layer are wrapped on the outer surface of the flame-retardant filling layer;And two layers of flame-retardant glass fiber tape layer are mutually crossed and added and wrapped on the surface of flame-retardant filling layer, the outer surface of the flame-retardant glass fiber tape layer is extruded and covered with polyolefin oxygen barrier layer, the outer surface of the polyolefin oxygen barrier layer is extruded and covered with outer sheath.The utility model solves the problem that the internal flame-retardant structure layer of existing halogen-free flame-retardant cable causes poor bending resistance of itself, which is difficult to effectively improve the bending resistance of flame-retardant cable.

[0004] The internal flame-retardant structure layer of existing rail transit cable is single, which can ensure the flame-retardant effect of cable for a short time, but the flame-retardant structure layer is easily damaged when the cable is used in high-temperature combustion state for a long time, reducing the use effect of the cable and failing to meet the use demand. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of high safe flame-retardant cable for rail transit, to solve the problem that the internal flame-retardant structure layer of existing rail transit cable is single in the above background art, which can ensure the flame-retardant effect of cable for a short time, but the flame-retardant structure layer is easily damaged when the cable is used in high-temperature combustion state for a long time, reducing the use effect of the cable and failing to meet the use demand.

[0006] To achieve the above object, the utility model provides the following technical scheme: A kind of high safety flame-retardant cable for rail transit, including cable core, the cable core includes wire core and filling layer, the outside of the cable core is provided with wrapping layer, the outside of the wrapping layer is provided with inner liner, and inner liner and wrapping layer are formed by extrusion coating, the outside of the inner liner is provided with composite flame-retardant layer, the outside of the composite flame-retardant layer is provided with compression layer, the outside of the compression layer is provided with armored layer, and composite flame-retardant layer, compression layer and armored layer are sequentially adhered outside the inner liner, the outside of the armored layer is provided with outer sheath, and outer sheath and armored layer are formed by extrusion coating.

[0007] Preferably, the wire core includes a conductor, a graphene coating, a shielding layer, a reinforcing layer, and an insulating layer, and the conductor is twisted by a plurality of copper wires, the graphene coating is disposed outside the conductor and is coated integrally with the conductor, and the shielding layer, the reinforcing layer, and the insulating layer are sequentially disposed outside the conductor and are formed by extrusion coating outside the conductor.

[0008] Preferably, the wire core is disposed at least six, and the wire cores are circularly and equidistantly disposed inside the cable core.

[0009] Preferably, the wrapping layer is spirally wound outside the cable core.

[0010] Preferably, the composite flame-retardant layer includes a first flame-retardant layer, a second flame-retardant layer, and an oxygen barrier layer, the second flame-retardant layer is disposed outside the first flame-retardant layer, the oxygen barrier layer is disposed between the first flame-retardant layer and the second flame-retardant layer, and the first flame-retardant layer, the second flame-retardant layer, and the oxygen barrier layer are integrated.

[0011] Preferably, the compression layer includes an elastic layer, a support ring, and a reserved cavity, the elastic layer is disposed outside the support ring, the reserved cavity is disposed inside the elastic layer, and the reserved cavity is disposed at the contact between the support ring and the elastic layer, and the elastic layer and the support ring are integrated.

[0012] Preferably, the outer sheath includes an outer coating layer, a shielding strip, and a wear-resistant coating layer, the shielding strip is disposed inside the outer coating layer, the shielding strip is disposed at least six, and the shielding strips are equidistantly disposed along the direction of the cable core, the wear-resistant coating layer is disposed on the outer wall of the outer coating layer, and the wear-resistant coating layer and the outer coating layer are coated integrally.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The utility model discloses a device through the setting of composite fire -retardant layer, the first fire -retardant layer adopts ceramic silicon rubber, and the silicon rubber matrix has excellent fire -retardant performance, can form the heat shield when the fire occurs rapidly, and ceramic silicon rubber can form the self -supporting ceramic body rapidly under high temperature, and the effective isolation flame spreads, and the second fire -retardant layer adopts low smoke halogen -free flame -retardant polyolefin, and the oxygen -resistant layer adopts aluminium hydroxide material, and aluminium hydroxide can release the crystal water under high temperature to reduce the ignition point of cable, thereby reach the purpose of fire -proofing, and the first fire -retardant layer, the second fire -retardant layer and oxygen -resistant layer are used in combination, and the fire -retardant performance of cable is greatly increased;

[0015] The utility model discloses a device through the setting of compression -resistant layer, and the elastic layer adopts polyurethane, and polyurethane has excellent energy absorption capacity and recovery, and rapidly disperses stress when being impacted, and reduces local damage, and the reserved cavity absorbs and disperses energy through the deformation of structure when being impacted, and plays the protection to the internal fire -retardant layer of cable, and improves the use effect of cable. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic diagram of the utility model;

[0017] Figure 2 It is the core structure diagram of the utility model;

[0018] Figure 3 It is the section view of composite fire -retardant layer of the utility model;

[0019] Figure 4 It is the section view of compression -resistant layer of the utility model;

[0020] Figure 5 It is the section view of outer sheath of the utility model.

[0021] In the drawing: 1, cable core;2, core;3, filling layer;4, tape layer;5, inner liner;6, composite fire -retardant layer;7, compression -resistant layer;8, armoring layer;9, outer sheath;10, conductor;11, graphene coating;12, shielding layer;13, reinforcing layer;14, insulating layer;15, first fire -retardant layer;16, second fire -retardant layer;17, oxygen -resistant layer;18, elastic layer;19, support ring;20, reserved cavity;21, sheath layer;22, shielding strip;23, wear -resistant coating. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.

[0023] Please refer to Figures 1-5The utility model provides an embodiment: a kind of high safety flame-retardant cable for rail transit, including cable core 1, cable core 1 includes wire core 2 and filling layer 3, cable core 1 is provided with wrapping layer 4 outside, wrapping layer 4 is provided with inner liner 5 outside, and inner liner 5 is formed with wrapping between wrapping layer 4, inner liner 5 is provided with composite flame-retardant layer 6 outside, composite flame-retardant layer 6 is provided with compression layer 7 outside, compression layer 7 is provided with armored layer 8 outside, and composite flame-retardant layer 6, compression layer 7 and armored layer 8 are sequentially adhered outside inner liner 5, armored layer 8 is provided with outer sheath 9 outside, and outer sheath 9 is formed with wrapping between armored layer 8, wire core 2 includes conductor 10, graphene coating 11, shielding layer 12, reinforcing layer 13 and insulating layer 14, and conductor 10 is twisted by multiple copper wires, graphene coating 11 is arranged outside conductor 10, and graphene coating 11 is coated with conductor 10, shielding layer 12, reinforcing layer 13 and insulating layer 14 are sequentially arranged outside conductor 10, and shielding layer 12, reinforcing layer 13 and insulating layer 14 are formed with wrapping outside conductor 10, wire core 2 is arranged at least six, and wire core 2 is circularly equidistantly arranged inside cable core 1, filling layer 3 is arranged at the gap of cable core 1, and wrapping layer 4 is spirally wound outside cable core 1.

[0024] Please refer to Figure 1 And Figure 3 Composite flame-retardant layer 6 includes first flame-retardant layer 15, second flame-retardant layer 16 and oxygen barrier layer 17, second flame-retardant layer 16 is arranged outside first flame-retardant layer 15, oxygen barrier layer 17 is arranged between first flame-retardant layer 15 and second flame-retardant layer 16, and first flame-retardant layer 15, second flame-retardant layer 16 and oxygen barrier layer 17 are arranged as a whole, first flame-retardant layer 15 adopts ceramicized silicone rubber, and the silicone rubber matrix has excellent flame-retardant performance, can form a heat shield barrier rapidly when fire occurs, and ceramicized silicone rubber can form a self-supporting ceramic body rapidly under high temperature, effectively insulate flame propagation, second flame-retardant layer 16 adopts low-smoke halogen-free flame-retardant polyolefin, and does not produce toxic gas and a large amount of smoke when burning, oxygen barrier layer 17 adopts aluminum hydroxide material, and aluminum hydroxide can release crystal water under high temperature, so as to reduce the ignition point of cable, so as to achieve the purpose of fire insulation and fire prevention, the combination of first flame-retardant layer 15, second flame-retardant layer 16 and oxygen barrier layer 17 greatly increases the flame-retardant performance of cable.

[0025] Please refer to Figure 1 And Figure 4The anti-pressing layer 7 comprises an elastic layer 18, a supporting ring 19 and a reserved cavity 20, the elastic layer 18 is arranged outside the supporting ring 19, the reserved cavity 20 is arranged inside the elastic layer 18, and the reserved cavity 20 is arranged at the contact position of the supporting ring 19 and the elastic layer 18, the elastic layer 18 and the supporting ring 19 are arranged in an integrated mode, the elastic layer 18 is made of polyurethane, the polyurethane has excellent energy absorption capacity and recovery, can quickly disperse stress and reduce local damage when impacted, the reserved cavity 20 can absorb and disperse energy by structural deformation when impacted, and the flexibility of the cable is maintained, so that the cable is convenient to install and bend.

[0026] Please refer to Figure 1 and Figure 5 The outer sheath 9 comprises an outer covering layer 21, shielding strips 22 and a wear-resistant coating 23, the shielding strips 22 are arranged inside the outer covering layer 21, the shielding strips 22 are at least six in number and are equidistantly arranged along the running direction of the cable core 1, and the wear-resistant coating 23 is arranged on the outer wall of the outer covering layer 21 and is integrally coated with the outer covering layer 21, the shielding strips 22 increase the shielding performance of the outer sheath 9, the wear-resistant coating 23 is made of epoxy resin, and a hard and wear-resistant protective layer is formed on the outside of the outer covering layer 21 after the epoxy resin is cured, so that the wear-resistant performance of the outer surface of the outer sheath 9 is increased.

[0027] The contents not described in detail in the specification belong to the prior art known by the person skilled in the art.

[0028] Although the embodiments of the utility model have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high safety flame-retardant cable for rail transport comprising a core (1), characterized in that: The cable core (1) comprises a wire core (2) and a filling layer (3), the outer part of the cable core (1) is provided with a wrapping layer (4), the outer part of the wrapping layer (4) is provided with an inner liner layer (5), the inner liner layer (5) and the wrapping layer (4) are formed by extrusion, the outer part of the inner liner layer (5) is provided with a composite flame-retardant layer (6), the outer part of the composite flame-retardant layer (6) is provided with a pressure-resistant layer (7), the outer part of the pressure-resistant layer (7) is provided with an armor layer (8), and the composite flame-retardant layer (6), the pressure-resistant layer (7) and the armor layer (8) are sequentially attached to the outer part of the inner liner layer (5), the outer part of the armor layer (8) is provided with an outer sheath (9), and the outer sheath (9) and the armor layer (8) are formed by extrusion.

2. A high safety flame-retardant cable for rail transit according to claim 1, characterized in that: The wire core (2) comprises a conductor (10), a graphene coating layer (11), a shielding layer (12), a reinforcing layer (13) and an insulating layer (14), the conductor (10) is twisted by a plurality of copper wires, the graphene coating layer (11) is arranged on the outer part of the conductor (10) and is coated integrally with the conductor (10), and the shielding layer (12), the reinforcing layer (13) and the insulating layer (14) are sequentially arranged on the outer part of the conductor (10) and are formed by extrusion on the outer part of the conductor (10).

3. A high safety flame-retardant cable for rail transit according to claim 1, characterized in that: The wire core (2) is arranged at least six times, and the wire core (2) is arranged in a circular manner at equal intervals in the inner part of the cable core (1).

4. A high safety flame-retardant cable for rail transportation according to claim 1, characterized in that: The wrapping layer (4) is spirally wound on the outer part of the cable core (1).

5. A high safety flame-retardant cable for rail transportation according to claim 1, characterized in that: The composite flame-retardant layer (6) comprises a first flame-retardant layer (15), a second flame-retardant layer (16) and an oxygen barrier layer (17), the second flame-retardant layer (16) is arranged on the outer part of the first flame-retardant layer (15), the oxygen barrier layer (17) is arranged between the first flame-retardant layer (15) and the second flame-retardant layer (16), and the first flame-retardant layer (15), the second flame-retardant layer (16) and the oxygen barrier layer (17) are arranged integrally.

6. A high safety flame-retardant cable for rail transport according to claim 1, characterized in that: The pressure-resistant layer (7) comprises an elastic layer (18), a support ring (19) and a reserved cavity (20), the elastic layer (18) is arranged on the outer part of the support ring (19), the reserved cavity (20) is arranged in the inner part of the elastic layer (18), and the reserved cavity (20) is arranged at the contact part of the support ring (19) and the elastic layer (18), and the elastic layer (18) and the support ring (19) are arranged integrally.

7. A high safety flame-retardant cable for rail transport according to claim 1, characterized in that: The outer sheath (9) comprises an outer coating layer (21), a shielding strip (22) and a wear-resistant coating layer (23), the shielding strip (22) is arranged in the inner part of the outer coating layer (21), the shielding strip (22) is arranged at least six times, and the shielding strip (22) is arranged at equal intervals along the direction of the cable core (1), the wear-resistant coating layer (23) is arranged on the outer wall of the outer coating layer (21), and the wear-resistant coating layer (23) and the outer coating layer (21) are coated integrally.

Images