CN211404089U

CN211404089U - High-performance flame-retardant fireproof waterproof rail transit direct-current power cable

Info

Publication number: CN211404089U
Application number: CN201922479906.7U
Authority: CN
Inventors: 王小新
Original assignee: Shanghai Nanda Group Co ltd
Current assignee: Shanghai Nanda Group Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-01
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a fire-retardant fire prevention waterproof track traffic direct current power cable of high performance, fire-retardant fire prevention waterproof track traffic direct current power cable of high performance includes the copper conductor, the peripheral cladding has synthetic insulating layer, comprehensive waterproof layer, flame retardant coating, armor, separates fire insulating layer and outer tegument from inside to outside in proper order, the copper conductor includes the centre layer, be equipped with a plurality of conductor layer outside the centre layer, when the single line radical of conductor layer is more than or equal to 2, each conductor layer is equallyd divide the layer and is sticiss, and each layer transposition direction and transposition pitch are also the homogeneous phase. The utility model discloses better fire behaviour, fire behavior and waterproof performance have to very high fail safe nature and life have.

Description

High-performance flame-retardant fireproof waterproof rail transit direct-current power cable

Technical Field

The utility model relates to a cable, concretely relates to rated voltage 1500V and following 2 nd type line transposition sticiss fire-retardant fire prevention waterproof track traffic direct current power cable of circular copper conductor crosslinked polyethylene insulation high performance.

Background

At present, the 1500V rated voltage rail transit direct current power cable has the following defects:

1) the cable does not have fire-proof performance, and cable line is in case breaks down, adopts reserve circuit to supply power, and although the circuit of cable all generally has high fire-retardant characteristic, the conflagration that ground fault of cable arouses very probably influences other circuits, because the conflagration that other outside external fires arouse, will burn out the circuit of cable (including reserve), makes the subway operation difficult to resume in the short time.

2) Be equipped with between insulating layer and the outer protective layer and separate the oxygen layer, with the flame retardant property who improves the cable, it is high fire-retardant thermoplastic halogen-free low smoke polyolefin sheath material to separate the oxygen layer, this material is harder, elasticity is little and elongation at break is little, it can influence the soft bending nature of cable to separate the oxygen layer, thereby can not satisfy the high crooked service environment of cable, in addition when the cable burning, the oxygen layer that separates of cable is heated shrink and insulating interlamellar space and is crescent, fire has accelerated the insulating layer burning through the space, cause the heat release total amount of cable and heat release rate hardly up to standard.

3) The outer sheath of cable receives high temperature weather and illumination can appear the shrink of certain degree in the open air, causes the outer sheath of cable intermediate head department to appear the slippage of different degrees after the operation several years, finally causes the outer jacket of cable intermediate head department to be destroyed, has the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned problem to a fire-retardant fire prevention waterproof track traffic direct current power cable of high performance is provided.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a fire-retardant fire prevention waterproof track traffic DC power cable of high performance, fire-retardant fire prevention waterproof track traffic DC power cable of high performance includes the copper conductor, the peripheral cladding has comprehensive insulating layer, comprehensive waterproof layer, flame retardant coating, armor, separates fire insulating layer and outer tegument from inside to outside in proper order of copper conductor, the copper conductor includes the centre layer, the centre layer is equipped with a plurality of conductor layer outward, when the single wire radical of conductor layer is more than or equal to 2, the layer is equallyd divide to each conductor layer sticiss, and each layer transposition direction and transposition pitch are also the homogeneous phase the same.

In a preferred embodiment of the present invention, the comprehensive insulating layer is composed of a fireproof insulating layer and a plastic insulating layer, the fireproof insulating layer is formed by overlapping a ceramic mica tape on a copper conductor, and the plastic insulating layer is formed by tightly wrapping and extruding a crosslinked polyethylene insulating material on the fireproof insulating layer.

In a preferred embodiment of the present invention, the comprehensive waterproof layer is composed of a water-blocking layer formed by overlapping an insulating water-blocking tape on a plastic insulating layer, and a radial waterproof layer formed by tightly wrapping and extruding a medium density polyethylene sheath material or a high density polyethylene sheath material on the water-blocking layer.

In a preferred embodiment of the present invention, the fire-proof layer is formed by overlapping a ceramic fire-proof tape on the radial water-proof layer.

In a preferred embodiment of the present invention, the armor is interlocked and armored on the fire-resistant layer by double-layer aluminum alloy strips.

In a preferred embodiment of the present invention, the fire-proof and thermal-insulation layer is wrapped on the armor layer by overlapping a halogen-free low-smoke glass fiber tape.

In a preferred embodiment of the present invention, the outer coating layer is formed by tightly wrapping and extruding the halogen-free low-smoke polyolefin flame-retardant sheath material on the fire-insulating layer.

The utility model has the advantages that:

the utility model discloses better fire behaviour, fire behavior and waterproof performance have to very high fail safe nature and life have.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of conductor structures of various specifications with a center layer of 1 round single wire.

FIG. 3 is a schematic diagram of the conductor structure of each specification with 2 or more profile type single wires as the central layer.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

Referring to fig. 1 to 3, the utility model provides a fire-retardant fire prevention waterproof track traffic direct current power cable of high performance, it includes copper conductor 100, has comprehensive insulating layer 200, comprehensive waterproof layer 300, flame retardant coating 400, armor 500, separates fire insulating layer 600 and tegument 700 at copper conductor 100 periphery cladding from inside to outside in proper order.

The specific center layer of copper conductor 100, the center layer is equipped with a plurality of conductor layer outward to when the single line number of conductor layer was more than or equal to 2, each conductor layer equallys divide the layer and sticiss, and each layer transposition direction and transposition pitch are also all the same.

The number of the single lines in the central layer is 1, 2, 3 or 4.

When the centre layer is 1 single line, the centre layer specifically can be 1 root circle shape single line 111, when being 2 or 3 or 4, the centre layer specifically all is heterotypic single line 112, and adjacent outer layer dysmorphism type single line 112 root is 6 more than its inlayer, make copper conductor 100 structure rule stable like this, copper conductor 100 single line root also accords with cable conductor's universal architecture, each layer transposition direction and transposition pitch homogeneous phase can be guaranteed to tend to unanimously through conductor single line current direction, thereby improve copper conductor 100's conductivity.

In addition, the ratio of the stranding pitch diameter of the outer layer of the copper conductor 100 is not more than 23 times, so that better conductivity is obtained on the premise of ensuring the appearance quality of the conductor.

The compression coefficient of the copper conductor 100 is not less than 0.97, so that the gaps among the single wires in the conductor 100 are very small, the single wires in the copper conductor 100 are in full contact, the conductivity of the copper conductor 100 can be improved, and the structure is stable and not loose.

The nominal cross-section of each of the shaped element wires 112 in the copper conductor 100 is the same, 300mm²The nominal cross sections of the single wires used by the conductors with different specifications are the same, so that the production efficiency is higher, the specifications of the single wires are consistent, the production, the management and the control are easy, and the semi-finished products of the single wires can be reduced.

The copper conductor 100 is integrally produced on a frame strander (or a fork strander), a concentric and equidirectional synchronous layering non-back-twist stranding mode is adopted, and layering circular compaction is adopted, so that the effective area of the copper conductor 100 can be maximized and the gap can be minimized.

In addition, copper conductor 100 specifically can select for use high wear-resisting, high accuracy, high strength nanometer coating mould layering to sticis, the filling factor is big for copper conductor 100 outward appearance is smooth, the conductor is little to the effort of fire prevention insulating layer 210, can effectively ensure that plastic insulating layer 220 eccentricity is little, and the electric field is even unanimous when circular telegram, and the insulation has better dielectric strength, thereby improves the reliability and the life-span of cable.

The special-shaped single wire 112 can be formed by drawing a copper rod through a special-shaped drawing die on a copper large drawing machine.

Copper conductor 100 outward appearance that constitutes through above-mentioned structure is smooth, the coefficient of compaction is more than 0.97, the little frictional force in space between the single line is big, the whole atress of conductor and the not different deformation of stable in structure when the cable is crooked, it is little to slide between the single line, thereby it is more even and the too big condition of local effort can not appear to the effect of comprehensive insulating layer 200 power, in addition the single line of conductor fully contacts, each layer single line transposition pitch can suitably be enlargied, its conductor also can not be loose, make its conductor resistivity diminish like this, its conductor weighing cross-section is littleer under the standard requirement condition of same conductivity, thereby can save the copper product quantity at a certain degree, make the unit weight of cable light like this, the external diameter is.

The integrated insulating layer 200 is composed of a fireproof insulating layer 210 and a plastic insulating layer 220, the fireproof insulating layer 210 is formed by overlapping and wrapping a ceramic mica tape on the copper conductor 100, and the plastic insulating layer 220 is formed by tightly wrapping and extruding a cross-linked elastomer insulating material on the fireproof insulating layer 210.

In addition, the fireproof insulation layer 210 is used for tightly wrapping the copper conductor 100, so that the copper conductor 100 is not easy to loosen, the copper conductor 100 is not easy to deform under the action of external force, the structure of the copper conductor 100 is kept round and stable, and the ceramic mica tape has good insulation performance, so that the cable can still keep good insulation performance even after being burnt.

The plastic insulating layer 220 is formed by extruding a cross-linked polyethylene insulating material having high flexibility, and is used to ensure the insulation of the copper conductor 100.

The comprehensive waterproof layer 300 is composed of a waterproof layer 310 and a radial waterproof layer 320, the waterproof layer 310 is formed by overlapping and wrapping an insulating waterproof tape on the plastic insulating layer 220, and the radial waterproof layer 320 is formed by tightly wrapping and extruding a medium-density polyethylene sheath material or a high-density polyethylene sheath material on the waterproof layer 310.

Because the water blocking layer 310 has a certain insulating property, it rapidly expands when it meets water or moisture, and has a radial and longitudinal water blocking effect, when the outer sheath of the cable is damaged, the water blocking layer 310 can effectively prevent water or moisture outside the cable from entering the cable, so that the insulating property of the cable is not reduced.

Because the compactness of the medium density polyethylene or high density polyethylene isolating sleeve of the radial waterproof layer 320 is good, the water absorption capacity is very small when the water meets the water, and the radial waterproof performance is very good, so that the radial waterproof performance of the comprehensive waterproof layer 300 is further improved.

The fireproof layer 400 is formed by overlapping and wrapping ceramic fireproof belts outside the radial insulating layer 320, and the ceramic fireproof belts have good electrical insulating property, fire insulation, heat insulation and flame retardant property, namely, the ceramic fireproof belts are formed into ceramic hard shells after combustion and still have good insulating property, the ceramic hard shells are stable and compact in structure and have no air gaps, and the ceramic hard shells do not absorb moisture after being exposed in the air for a long time, so that the good insulating property between conductors of the cable and the armor layer 500 can be guaranteed after the cable is combusted.

The armor layer 500 is formed by interlocking and armoring double-layer aluminum alloy strips on the fireproof layer 400.

Because the aluminum alloy belts of the double-layer aluminum alloy belt interlocking armor structure are tightly combined, the structure is stable, the flexibility is good, the external mechanical effect is good, and the anti-biting of animals is realized, the radial water-blocking layer 320 of the cable can be well protected from being damaged.

The fire-proof heat-insulating layer 600 is formed by wrapping halogen-free low-smoke glass fiber tapes outside the armor layer 500 in an overlapping manner.

The fire-insulating layer 600 has small heat release amount and good fire-insulating and heat-insulating effects, so that the temperature rise of external combustion heat transferred to the armor layer during the combustion of the cable is ensured to be within the melting point of the aluminum alloy, and the armor layer is prevented from being damaged by melting.

The outer layer 700 is formed by tightly wrapping and extruding a halogen-free low-smoke polyolefin flame-retardant sheath material on the fire-insulating layer 600, has small heat release, good flame retardance and good mechanical and physical properties, and can well protect the armor layer 500 of the cable from being damaged and corroded.

This application can form the fire wall of cable through flame retardant coating 400+ armor 500+ fire insulating layer 600, has better fire, fire-retardant, the mechanical protection effect of separating.

In addition, as the armor layer 500 is interlocked armor, the appearance is set to be a corrugated structure, the outer covering layer 700 is tightly wrapped and extruded, the appearance of the cable is also a corrugated structure, the structure can effectively prevent the outer covering layer 700 from contracting to a certain extent under high-temperature weather and illumination, so that the outer covering layer 700 at the middle joint of the cable does not slip after running for several years, and the performance of the middle joint can be effectively ensured to continuously meet the requirements.

In addition, because the armor layer 500 of the cable is interlocked armor, the cable has better bending property, after the cable burns, the plastic insulating layer 220 and the comprehensive waterproof layer 300 of the cable are all burnt and form air gaps, the fireproof insulating layer 210 and the fireproof layer 400 are burnt into ceramic sealing hard shells and have better insulating property, at the moment, the aluminum alloy belt interlocked armor structure becomes a metal bracket of the cable, the structures of the fireproof insulating layer 210 and the fireproof layer 400 can be effectively protected from being damaged, the better insulating property between the conductor of the cable and the armor layer is always kept, the cable can still pass through a fire-resistant water spraying test under S-shaped bending or U-shaped bending, the cable can still run safely and reliably after being burnt, and the cable has better fireproof property.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a fire-retardant fire prevention waterproof track traffic DC power cable of high performance, a serial communication port, fire-retardant fire prevention waterproof track traffic DC power cable of high performance includes the copper conductor, the peripheral cladding has comprehensive insulating layer, comprehensive waterproof layer, flame retardant coating, armor, separates fire insulating layer and outer tegument from inside to outside in proper order of copper conductor, the copper conductor includes the centre layer, be equipped with a plurality of conductor layer outside the centre layer, when the single line radical of conductor layer is more than or equal to 2, each conductor layer is equallyd divide the layer and is sticiss, and each layer transposition direction and transposition pitch are also the homogeneous phase.

2. The high-performance flame-retardant, fireproof and waterproof rail transit direct-current power cable according to claim 1, wherein the comprehensive insulating layer is composed of a fireproof insulating layer and a plastic insulating layer, the fireproof insulating layer is formed by overlapping and wrapping a ceramic mica tape on a copper conductor, and the plastic insulating layer is formed by tightly wrapping and extruding a crosslinked polyethylene insulating material on the fireproof insulating layer.

3. The high-performance flame-retardant fireproof waterproof rail transit direct-current power cable according to claim 1, wherein the comprehensive waterproof layer is composed of a waterproof layer and a radial waterproof layer, the waterproof layer is formed by overlapping and wrapping an insulating waterproof tape on a plastic insulating layer, and the radial waterproof layer is formed by tightly wrapping and extruding a medium-density polyethylene sheath material or a high-density polyethylene sheath material on the waterproof layer.

4. The high-performance flame-retardant, fireproof and waterproof rail transit direct-current power cable according to claim 3, wherein the fireproof layer is formed by lapping a ceramic fireproof tape on a radial waterproof layer in an overlapping manner.

5. The high-performance flame-retardant, fireproof and waterproof rail transit direct-current power cable according to claim 4, wherein the armor layer is interlocked and armored on the fireproof layer by double layers of aluminum alloy strips.

6. The high-performance flame-retardant fireproof waterproof rail transit direct-current power cable according to claim 5, wherein the fire-insulating and heat-insulating layer is wrapped on the armor layer in an overlapping manner by a halogen-free low-smoke glass fiber tape.

7. The high-performance flame-retardant fireproof waterproof rail transit direct-current power cable according to claim 6, wherein the outer coating layer is formed by tightly wrapping and extruding a halogen-free low-smoke polyolefin flame-retardant sheath material on a fire-insulating layer.