CN109411116A - A kind of high fire-retardance railway signal cable - Google Patents
A kind of high fire-retardance railway signal cable Download PDFInfo
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- CN109411116A CN109411116A CN201811271002.9A CN201811271002A CN109411116A CN 109411116 A CN109411116 A CN 109411116A CN 201811271002 A CN201811271002 A CN 201811271002A CN 109411116 A CN109411116 A CN 109411116A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/005—Quad constructions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0045—Cable-harnesses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/20—Metal tubes, e.g. lead sheaths
- H01B7/205—Metal tubes, e.g. lead sheaths composed of aluminium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2806—Protection against damage caused by corrosion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
Abstract
The present invention provides a kind of high fire-retardance railway signal cables, including cable core, and the sheath being coated on outside cable core；The cable core includes at least one conducting wire group；Conducting wire group includes the insulated single wire that four different colours are mutually twisted setting；Every insulated single wire is made of conductor, inner insulating layer, external insulation layer, high fire-retardance belting layer and composite sheath；The periphery for belonging to four insulated single wires of the same conducting wire group is successively surrounded with from inside to outside pricks yarn, inside non-hygroscopic insulating layer, first screen layer and outside non-hygroscopic insulating layer；The sheath includes the cable core belting layer set gradually from the inside to the outside, first buffer layer, secondary shielding layer, second buffer layer, steel-tape armouring layer and oversheath.High fire-retardance railway signal cable of the present invention has reliable service life, and thermal stability, moisture resistance, anti-flammability, high temperature resistance are excellent, can bear larger dose of radiation.
Description
Technical field
The invention belongs to cable industry technical fields, more particularly, to a kind of high fire-retardance railway signal cable.
Background technique
With the multiple speed-raising of railway, cable is not required nothing more than with general characteristic, and there should be cracking resistance, Halogen, low
Cigarette, performance fire-retardant, the service life is long will also have specific environment resistant.Currently, extraordinary serious natural calamities generation is increasingly frequent, by
Its fire caused, nuclear safety should cause people to introspect.
Central nervous system of the railway signal cable as railway, generally along its track laying in rail flanges, cable is long
Phase works in this case, and most of cable insulation and sheath cannot withstand intense radiation requirement, or encounter fire after laying
When cable flame retardance can not meet the self-extinguish time after live disaster relief requirement, the especially cable fire of poor flame retardant properties
It is long, extreme difficulties are brought to disaster relief work, cause bigger injury and loss.
Summary of the invention
In view of this, the present invention is directed to propose a kind of high fire-retardance railway signal cable has to overcome the deficiencies of existing technologies
There is reliable service life, thermal stability, moisture resistance, anti-flammability, high temperature resistance are excellent, can bear larger dose of radiation.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of high fire-retardance railway signal cable, including cable core, and the sheath being coated on outside cable core；
The cable core includes at least one conducting wire group；Conducting wire group includes the insulation list that four different colours are mutually twisted setting
Line；Every insulated single wire is made of conductor, inner insulating layer, external insulation layer, high fire-retardance belting layer and composite sheath；Belong to same
The periphery of four insulated single wires of conducting wire group is successively surrounded with from inside to outside pricks yarn, inside non-hygroscopic insulating layer, the first shielding
Layer and outside non-hygroscopic insulating layer；
The sheath includes the cable core belting layer set gradually from the inside to the outside, first buffer layer, secondary shielding layer, second slow
Rush layer, steel-tape armouring layer and oversheath.
Further, conductor is twisted silver-coated copper wire, and specifically, conductor uses 24 filament diameters for 0.2-0.25mm
Silver-coated copper wire be twisted.
Further, the material of inner insulating layer is crosslinked polyethylene.
Further, the material of external insulation layer is polyether-ether-ketone.
Further, composite sheath is copper strips longitudinal tubing+one-time formed composite sheath of extrusion molding high fire-retardance sheath.Specifically
For, this sheath is squeezed by longitudinal wrap technique longitudinal wrap at after tubulose and outside it using the copper strips with a thickness of 0.02-0.1mm thickness
Mould one layer of high fire-retardance sheath one-pass molding to constitute, jacket thickness 0.5-1mm, make cable with superior heatproof, shielding and
Humidity resistance.
Further, first screen layer is silver-gilt copper wire braiding layer.Specifically, silver-gilt copper wire braiding layer is using diameter
Pass through mesh grid made of high-speed knitter braiding, count 90-95% for the silver-coated copper wire of 0.15-0.2mm.Braiding screen
Covering layer makes the light softness of cable, enhances the shielding properties of cable.This material can be commercially available.
Further, first buffer layer is high fire-retardance oxygen barrier layer.
Further, secondary shielding layer is ripple aluminium sheath.
Further, second buffer layer is Ceramic silicon rubber.
Further, oversheath is polyether-ether-ketone sheath.
Compared with the existing technology, a kind of high fire-retardance railway signal cable of the present invention has the advantage that
A kind of high fire-retardance railway signal cable of the present invention, it is structurally reasonable simple, it manufactures and is easy, service performance
It is good.The cable has superior thermal stability, moisture resistance, mechanical and physical performance, high flame resistance, high temperature resistance, can bear
Biggish dose of radiation, long service life are a kind of ideal chose cables of railway construction.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the simple structure schematic diagram of high fire-retardance railway signal cable described in the embodiment of the present invention；
Fig. 2 is that the enlarged structure of one of conducting wire group in high fire-retardance railway signal cable described in the embodiment of the present invention is shown
It is intended to.
Description of symbols:
1- cable core；11- conducting wire group；111- insulated single wire；1111- conductor；1112- inner insulating layer；1113- external insulation layer；
1114- high fire-retardance belting layer；1115- composite sheath；112- pricks yarn；Non-hygroscopic insulating layer on the inside of 113-；114- first is shielded
Layer；Non-hygroscopic insulating layer on the outside of 115-；2- sheath；21- cable core belting layer；22- first buffer layer；23- secondary shielding layer；
24- second buffer layer；25- steel-tape armouring layer；26- oversheath.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase
To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To explicitly or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As depicted in figs. 1 and 2, a kind of high fire-retardance railway signal cable, including cable core 1, and the sheath being coated on outside cable core 1
2；The cable core 1 includes four conducting wire groups 11；Conducting wire group 11 includes the insulated single wire 111 that four different colours are mutually twisted setting；
Every insulated single wire 111 is by conductor 1111, inner insulating layer 1112, external insulation layer 1113, high fire-retardance belting layer 1114 and comprehensive shield
1115 composition of set；The periphery for belonging to four insulated single wires 111 of the same conducting wire group 11 is successively surrounded with bundle yarn from inside to outside
112, inside non-hygroscopic insulating layer 113, first screen layer 114 and outside non-hygroscopic insulating layer 115；The sheath 2 includes
Cable core belting layer 21, first buffer layer 22, secondary shielding layer 23, second buffer layer 24, the steel band armour set gradually from the inside to the outside
Fill layer 25 and oversheath 26.
Wherein, conductor 1111 is twisted silver-coated copper wire, it is furthermore preferred that the present embodiment use 24 filament diameters for
The silver-coated copper wire of 0.205mm is twisted, with excellent electric conductivity, thermal conductivity, corrosion resistance and high-temperature oxidation resistance,
Softness is good, guarantees that wired signal transmission is reliable and stable.
Wherein, the material of inner insulating layer 1112 is crosslinked polyethylene.It is crosslinked polyetylene insulated to use commercially available product,
This product is usually that the method for using peroxide crosslinking makes polyethylene molecule become three-dimensional netted knot from linear molecular structure
Structure, i.e., thermoplastic polyethylene are changed into heat cured crosslinked polyethylene, so that its heat resistance and mechanical performance is greatly improved,
The shrinkage for reducing it, not re-melting after keeping it heated, and keep excellent electric property.
Wherein, the material of external insulation layer 1113 is polyether-ether-ketone.Polyether-ether-ketone has superior high temperature resistance, antifatigue
Performance, wear-resisting property, radiation-resistant property, corrosion resistance, flame retardant property and chemical stability are good.
Wherein, composite sheath 1115 is copper strips longitudinal tubing+one-time formed composite sheath of extrusion molding high fire-retardance sheath.Specifically
To for the present embodiment, this sheath be using with a thickness of 0.05mm thickness copper strips pass through longitudinal wrap technique longitudinal wrap at after tubulose and
The one layer of high fire-retardance sheath one-pass molding of its outer extrusion molding is constituted, and jacket thickness 0.8mm makes cable have superior heatproof, screen
It covers and humidity resistance.
Wherein, first screen layer 114 is silver-gilt copper wire braiding layer.For the present embodiment, silver-gilt copper wire braiding layer
Be use diameter be the silver-coated copper wire of 0.2mm by high-speed knitter braiding made of mesh grid, count 95%.Braiding
Shielded layer makes the light softness of cable, enhances the shielding properties of cable.This material can be commercially available.
Wherein, first buffer layer 22 be high fire-retardance oxygen barrier layer, first buffer layer 22 with a thickness of 1.8mm.High fire-retardance is oxygen barrier
Layer, not only oxygen index (OI) is high, and has fabulous heat-insulated and oxygen barrier, and when burning releases without halogen acid gas, toxicity corrosivity gas
Body burst size is few, and the smokescope of generation is low, has splendid flame retardant property and processing performance.Specific in the present embodiment,
The oxygen barrier layered material of FZD1501 that the oxygen barrier material of high fire-retardance oxygen barrier layer is produced using the moral new material Co., Ltd of Shanghai side.
Wherein, secondary shielding layer 23 is ripple aluminium sheath.Ripple aluminium sheath is to pass through weldering using with a thickness of the aluminium sheet of 1.2mm
It connects embossing technique to be made, it has shield effectiveness good, in signals transmission, not by other external interferences, can effectively protect
Demonstrate,prove train operating safety.In addition, ripple aluminium sheath shielded layer is firm, it is unlikely to deform, is used for cable production, cable can be made to have
There are higher tensile strength and bending property.The ripple aluminium sheath of the present embodiment can be commercially available.
Wherein, second buffer layer 24 be Ceramic silicon rubber, second buffer layer 24 with a thickness of 1.5mm.Ceramic SiClx rubber
Glue has extraordinary fire prevention, fire resisting, fire-retardant, low cigarette, nontoxic performance, meanwhile, the residue after burning is hard for ceramic
Shell, hard shell are not melted under fire hazard environment, are not dripped, and have ensured that route is unimpeded in case of fire, are played firm protection and are made
With improving the fire retardant performance of cable.
Wherein, oversheath 26 is polyether-ether-ketone sheath.
The high fire-retardance railway signal cable of the present embodiment the production method is as follows:
When production, the thin copper wire for using drawing process that native copper bar is drawn into diameter as 0.205mm, and used on its surface
Silver plating process plates one layer of silver layer, and the silver-coated copper wire of 24 diameter 0.205mm is twisted into soft lead using synnema technique again later
Body 1111, and one layer of crosslinked polyethylene inner insulating layer is coated using the method for peroxide chemical crosslinking outside conductor 1111
1112, after coating a strata ether ether ketone external insulation layer 1113 again outside crosslinked polyethylene inner insulating layer 1112, using longitudinal wrap technique
Polyethers ether will be coated on by longitudinal wrap technique with a thickness of the oxygen-free copper stripe of the Halogen glass fiber tape of 0.02mm thickness and 0.05mm thickness
Outside ketone external insulation layer 1113, and in the high fire-retardance sheath one-pass molding that its outer extrusion molding a layer thickness is 0.8mm.It needs to illustrate
It is that the Halogen glass fiber tape (namely high fire-retardance belting layer) is coated on outside polyether-ether-ketone external insulation layer 1113, described
Oxygen-free copper stripe is coated on outside Halogen glass fiber tape, completes the production of insulated single wire 111.
The insulated single wire 111 of produced 4 different colours is made by twisting conducting wire group 11 using high speed star quadding machine later,
And use weaving by diameter for the silver-plated of 0.2mm around wrapping yarn 112 and cladding inside non-hygroscopic insulating layer 113 outside
Copper wire weaves one layer of mesh grid by high-speed knitter and is coated on outside inside non-hygroscopic insulating layer 113, count 95%,
Coat one layer of outside non-hygroscopic insulating layer 115 again outside copper wire woven layer.
Several conducting wire groups 11 are made by twisting cable core 1 using machine for making cable high-speedly together, and in cable core 1 outer cladding, one layer of alkali-free
Glass fibre belting layer, the height for then extrusion process being used to coat a layer thickness as 1.8mm outside alkali-free glass fibre belting layer
Fire-retardant oxygen barrier layer makes one layer of ripple by welding embossing technique using the aluminium sheet with a thickness of 1.2mm outside high fire-retardance oxygen barrier layer
Aluminium sheath uses outside corrugated aluminium restrictive coating and extrudes technique and coat a layer thickness for 1.5mm Ceramic silicon rubber layer, in ceramic
Wrapped one layer of double-deck galvanized steel strip gap is used to be not more than 40% armor of width of steel band around Inter-packet gap outside silastic-layer, and
The gap of internal layer steel band is covered by the middle section of outer layer steel belt, is made in one strata ether ether ketone sheath of armor outer cladding
High fire-retardance railway signal cable of the invention.
The high fire-retardance railway signal cable of the present embodiment, it is structurally reasonable simple, it manufactures and is easy, service performance is good.Electricity
Cable has superior thermal stability, moisture resistance, mechanical and physical performance, high flame resistance, high temperature resistance, can bear biggish spoke
Penetrate dosage, long service life.The cable is the ideal chose cable of railway construction.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of high fire-retardance railway signal cable, it is characterised in that: including cable core (1), and be coated on the sheath of cable core (1) outside
(2)；
The cable core (1) includes at least one conducting wire group (11)；Conducting wire group (11) includes that four different colours are mutually twisted setting
Insulated single wire (111)；Every insulated single wire (111) is by conductor (1111), inner insulating layer (1112), external insulation layer (1113), height
Fire-retardant belting layer (1114) and composite sheath (1115) composition；Belong to four insulated single wires (111) of the same conducting wire group (11)
Periphery be successively surrounded with from inside to outside prick yarn (112), inside non-hygroscopic insulating layer (113), first screen layer (114) and outside
Side non-hygroscopic insulating layer (115)；
The sheath (2) includes the cable core belting layer (21) set gradually from the inside to the outside, first buffer layer (22), secondary shielding layer
(23), second buffer layer (24), steel-tape armouring layer (25) and oversheath (26).
2. high fire-retardance railway signal cable according to claim 1, it is characterised in that: conductor (1111) is twisted silver-plated copper
Line.
3. high fire-retardance railway signal cable according to claim 1, it is characterised in that: the material of inner insulating layer (1112) is
Crosslinked polyethylene.
4. high fire-retardance railway signal cable according to claim 1, it is characterised in that: the material of external insulation layer (1113) is
Polyether-ether-ketone.
5. high fire-retardance railway signal cable according to claim 1, it is characterised in that: composite sheath (1115) is vertical for copper strips
Wrap molding+one-time formed the composite sheath of extrusion molding high fire-retardance sheath.
6. high fire-retardance railway signal cable according to claim 1, it is characterised in that: first screen layer (114) is silver-plated
Copper-wire braided layer.
7. high fire-retardance railway signal cable according to claim 1, it is characterised in that: first buffer layer (22) is high fire-retardance
Oxygen barrier layer.
8. high fire-retardance railway signal cable according to claim 1, it is characterised in that: secondary shielding layer (23) is corrugated aluminium
Sheath.
9. high fire-retardance railway signal cable according to claim 1, it is characterised in that: second buffer layer (24) is ceramic
Silicon rubber.
10. high fire-retardance railway signal cable according to claim 1, it is characterised in that: oversheath (26) is polyether-ether-ketone
Sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811271002.9A CN109411116B (en) | 2018-10-29 | 2018-10-29 | High flame-retardant railway signal cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811271002.9A CN109411116B (en) | 2018-10-29 | 2018-10-29 | High flame-retardant railway signal cable |
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| Publication Number | Publication Date |
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| CN109411116A true CN109411116A (en) | 2019-03-01 |
| CN109411116B CN109411116B (en) | 2020-04-21 |
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Cited By (5)
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| CN110098006A (en) * | 2019-04-28 | 2019-08-06 | 江苏通鼎光电科技有限公司 | A kind of B1 grades of fire-retardant railway Signal cable and its preparation method |
| CN110098012A (en) * | 2019-04-28 | 2019-08-06 | 江苏通鼎光电科技有限公司 | A kind of B1 grades of fire-retardant inter-city rail transit cable and its manufacturing method |
| CN112700912A (en) * | 2020-11-25 | 2021-04-23 | 通鼎互联信息股份有限公司 | High-strength internal shielding railway digital signal cable |
| CN114188080A (en) * | 2021-11-17 | 2022-03-15 | 江苏通鼎光电科技有限公司 | Temperature-resistant fireproof rail transit axle counting cable and manufacturing method thereof |
| CN114242330A (en) * | 2021-12-10 | 2022-03-25 | 江苏通鼎光电科技有限公司 | High-shielding railway signal cable |
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| CN209118789U (en) * | 2018-10-29 | 2019-07-16 | 通鼎互联信息股份有限公司 | A kind of high fire-retardance railway signal cable |
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| CN112700912A (en) * | 2020-11-25 | 2021-04-23 | 通鼎互联信息股份有限公司 | High-strength internal shielding railway digital signal cable |
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