CN205609233U - High fire behaviour cable in security level DCS dish cabinet - Google Patents

High fire behaviour cable in security level DCS dish cabinet Download PDF

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Publication number
CN205609233U
CN205609233U CN201620135538.8U CN201620135538U CN205609233U CN 205609233 U CN205609233 U CN 205609233U CN 201620135538 U CN201620135538 U CN 201620135538U CN 205609233 U CN205609233 U CN 205609233U
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CN
China
Prior art keywords
cable
layer
dish cabinet
level dcs
flame resistance
Prior art date
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Active
Application number
CN201620135538.8U
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Chinese (zh)
Inventor
熊科
张岚
毕斌
刘琢
潘冬雪
易蓓蓓
孙琪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Nuclear Power Engineering Co Ltd
Jiangsu Shangshang Cable Group Co Ltd
Original Assignee
China Nuclear Power Engineering Co Ltd
Jiangsu Shangshang Cable Group Co Ltd
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Application filed by China Nuclear Power Engineering Co Ltd, Jiangsu Shangshang Cable Group Co Ltd filed Critical China Nuclear Power Engineering Co Ltd
Priority to CN201620135538.8U priority Critical patent/CN205609233U/en
Application granted granted Critical
Publication of CN205609233U publication Critical patent/CN205609233U/en
Active legal-status Critical Current
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Abstract

The utility model provides a high fire behaviour cable in security level DCS dish cabinet which the structure is: the conductor wraps up the insulating layer outward and constitutes the sinle silk, and many sinle silk transposition constitute the cable core, and the cable core parcel has around the covering, adopts iron shielded layer outward again around the covering, the shielding layer wraps up the restrictive coating outward, the insulating layer is that the crowded package of crosslinked polyolefin that has passed through material life evaluation in 40 years constitutes, adopt the polyester area around the covering, the shielding layer adopts copper strips or copper wire, the material of restrictive coating is high fire -retardant low smoke and zero halogen material. The high fire behaviour cable in security level DCS dish cabinet that this technical scheme provided possesses high life and high fire behaviour simultaneously, is applicable to in the nuclear power station security level DCS dish cabinet.

Description

High flame resistance cable in safe level DCS dish cabinet
Technical field
The technical program relates to field of cable technology, particularly for the safe level DCS system dish cabinet of nuclear power station Inner cable.
Background technology
DCS is the english abbreviation (Distributed Control System) of dcs, automatic control at home Industry is also referred to as Distributed Control System.As purposes such as power supply, signal transmission, the DCS system of nuclear power plant needs Use substantial amounts of electric wire and cable, including connection electric wire, cable and the device interior between equipment and equipment (i.e. In DCS dish platform) electric wire that used, cable.
According to relevant laws and regulations and standard, consider from nuclear safety angle, all kinds of electric wires that safe level DCS system uses Type selecting and application with cable need to meet depth defense criterion, and major consideration includes service life, low cigarette Characteristic, Halogen characteristic and flame-retarding characteristic (being called for short " low-smoke non-halogen flame-retardant performance ") etc. are directly related to nuclear power station fortune The performance of administrative staff's personal safety.
According to investigations, Present Domestic cable producer combines the application of China's first safe level DCS platform and can be provided by Safe level DCS cabinet inner cable, the life-span is many not through the evaluation of severe test system, the highest bunchy Flame retardant rating can only achieve the D class of IEC standard definition.
Summary of the invention:
The technical program proposes a kind of high life, the nuclear power station DCS system cable of high flame resistance, its insulation Material has passed through material lifetime evaluation at least 40 years, and finished cable is evaluated through 20 years thermal lifetimes, fire-retardant Performance reaches IEC60332-3-23 (B class) flame-retardancy requirements, and all material is employing low smoke and zero halogen.
The technical program is high flame resistance cable in a kind of safe level DCS dish cabinet, and its structure is: conductor outsourcing Wrapping up in insulating barrier and constitute core, many core stranded composition cable cores, cable core is enclosed with lapping layer, wraps outside lapping layer again Wrap up in screen layer;Screen layer outer wrapping restrictive coating;
Described insulating barrier be use insulation crosslinked polyolefin materials (the evaluation life-span of material must reach more than 40 years, The i.e. service life of this material is no less than 40 years) extrude composition;
Described screen layer is proof copper-wire braided layer or metal tape (can use copper strips) lapping layer;The volume of proof copper-wire braided layer Knit density not less than 80%;The rate of putting up of metal tape lapping layer is not less than 25%;
Described lapping layer uses polyester belt, and rate of putting up is not less than 15%;
Described screen layer uses metallic shield.
The material of described restrictive coating is high flame resistance, low smoke halogen-free material, specifically can select high flame resistance, low smoke Halogen heat Plasticity polyolefine material.
Described conductor uses many stranded modes, and stranded lay ratio is not more than 20.Many core stranded composition cables The lay ratio of core is not more than 30.Restrictive coating THICKNESS CONTROL scope is 1.4mm~1.6mm.
Conductor uses many stranded modes, improves the pliability of cable.Insulant uses low-smoke non-halogen flame-retardant Crosslinked polyolefin materials, insulation is closely extruded on conductor.Many insulated wire cores stranded composition cable cores, outside cable core Wrapped metal tape uses high flame resistance sheath material as screen layer, sheath.
Insulation uses low-smoke non-halogen flame-retardant cross-linked polyolefin, have employed the extraordinary crosslinking by 40 years longevity assessment Polyolefine material.Sheath uses high flame resistance, low smoke Halogen protective cover material, it is ensured that cable has high flame resistance.
The cable that the technical program proposes is provided simultaneously with high life and high flame resistance, it is adaptable to nuclear power station security level Electric control system in DCS dish cabinet.
Accompanying drawing explanation
Fig. 1 is the cable radial section structural representation of the present embodiment.
In figure: 1, conductor, 2, insulating barrier, 3, lapping layer, 4, screen layer, 5, sheath;
Fig. 2 is the production technological process of the cable of the present embodiment.
Detailed description of the invention
With embodiment, this utility model is further described below in conjunction with the accompanying drawings.
Embodiment as shown in Figure 1 is as follows:
High flame resistance cable in a kind of safe level DCS dish cabinet, its structure is: conductor outer wrapping insulating barrier is constituted Core, many core stranded composition cable cores, cable core is enclosed with lapping layer, uses proof copper-wire braided layer outside lapping layer again As screen layer;The count of proof copper-wire braided layer is not less than 80%;It it is restrictive coating outside screen layer.Described insulation Layer is to use crosslinked polyolefin materials (more than 40 years life-span of evaluation) to extrude composition;Described lapping layer uses poly- Ester band, rate of putting up is not less than 15%.The material of described restrictive coating is high flame resistance, low smoke Halogen TPO material Material.
Described conductor uses many stranded modes, and stranded lay ratio is not more than 20.Many core stranded composition cables The lay ratio of core is not more than 30.Restrictive coating THICKNESS CONTROL scope is 1.4mm~1.6mm.
1 conductor: 2 classes stranded by soft round copper wire or 5 class conductors.
2 insulation: insulation crosslinked polyolefin materials extrudes and forms (by 40 years longevity assessment).
3 lapping layers: lapping layer uses polyester belt.
4 shieldings: shielding uses wrapped metal tape or proof copper-wire braided layer (the preferably proof copper-wire braided shielding of this example).
5 sheaths: sheath uses high flame resistance, low smoke halogen-free material to extrude and forms.
Conductor uses many soft round copper wires to be made by twisting, and (the optional trade mark is the outside extruded insulation layer of conductor The cable insulating material of FPE150-3).Each insulated wire cores is twisted into cable core, the outer wrapped lapping layer of cable core.Wrapped Each insulated wire cores is tightly bound in together by layer, and cable core has been carried out stabilized treatment.Copper wire is used outside lapping layer Braid, as metallic shield, is used for shielding external interference signals.Extruding sheath outside metallic shield, sheath uses High flame resistance, low smoke halogen-free material (the optional trade mark is the cable jacket material of HW461-9A), it is ensured that the high resistant of cable Combustion performance.
The cable of the present embodiment, its manufacture method such as Fig. 2, including step:
1) conductor is manufactured: according to the requirement of conductor lines footpath, use many soft round copper wires to be made by twisting;The strand of conductor Close lay ratio and be not more than 20 times.
2) manufacture core: employing extrudes mode and insulating barrier is wrapped in outside conductor, constitute core;Extrusion way Use squash type, it is ensured that insulation compactness.The core type of cooling uses sub-sectional cooling.
3) cable core is manufactured: many cores are made by twisting cable core, and stranding lay ratio is not more than 30 times;Outside cable core Wrapped polyester belt, rate of putting up is not less than 15%.
4) parcel screen layer: (not less than 80% or wrapped rate of putting up is not less than 25%, this example such as count The preferably program;).
5) sheath is extruded: the cable core employing after shielding extrudes mode and restrictive coating is wrapped in outside cable core, constitutes electricity Cable;Sheath extrudes employing squash type, and the type of cooling uses sub-sectional cooling.
The use of this cable: cable laying is in nuclear power station security level DCS dish cabinet.
Experiment proves that, the performance of this cable is as follows:
The life-span of cable: cable service life was more than 20 years;
Cable-flame retardant performance: cable can pass through IEC60332-3-23 (B class) flame-retardancy requirements.
Electrical property:
1,20 DEG C of conductor DC resistances meet IEC60228 or GB/T3956 regulation.
2, ac voltage withstanding test: apply 1.0kV alternating voltage, continues 5min, and process of the test insulation does not punctures.
Mechanical performance:
1, mechanical performance before insulation ag(e)ing: tensile strength >=9.0Mpa, elongation at break >=125%.
2, mechanical performance (135 ± 3 DEG C, 7d) after insulation ag(e)ing: tensile strength and elongation at break rate of change≤ ± 25%.
3, the aging front mechanical performance of sheath: tensile strength >=9.0Mpa, elongation at break >=125%.
4, the aging rear mechanical performance of sheath (100 ± 3 DEG C, 7d): tensile strength and elongation at break rate of change≤ ± 40%.
5, insulation heat extends: 200 ± 3 DEG C, 10min, 20N/cm2Under the conditions of;Under load, maximum elongation rate is not More than 175%, permanent elongation is not more than 15%.

Claims (5)

1. a high flame resistance cable in safe level DCS dish cabinet, is characterized in that structure is: conductor outer wrapping Insulating barrier constitutes core, and many core stranded composition cable cores, cable core is enclosed with lapping layer, wraps up outside lapping layer again Screen layer;Screen layer outer wrapping restrictive coating;
Described insulating barrier is to use insulation crosslinked polyolefin materials to extrude composition;
Described lapping layer uses polyester belt, and rate of putting up is not less than 15%;
Described screen layer is proof copper-wire braided layer or metal tape lapping layer;The count of proof copper-wire braided layer is not less than 80%;The rate of putting up of metal tape lapping layer is not less than 25%;
The material of described restrictive coating is high flame resistance, low smoke halogen-free material.
High flame resistance cable in safe level DCS dish cabinet the most according to claim 1, is characterized in that institute Stating conductor and use many stranded modes, stranded lay ratio is not more than 20.
High flame resistance cable in safe level DCS dish cabinet the most according to claim 1, is characterized in that many The lay ratio of root core stranded composition cable core is not more than 30.
High flame resistance cable in safe level DCS dish cabinet the most according to claim 1, is characterized in that protecting Certain jacket thickness span of control is 1.4mm~1.6mm.
High flame resistance cable in safe level DCS dish cabinet the most according to claim 1, is characterized in that institute State insulation crosslinked polyolefin materials requirement for having passed through material lifetime evaluation in 40 years.
CN201620135538.8U 2016-02-23 2016-02-23 High fire behaviour cable in security level DCS dish cabinet Active CN205609233U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620135538.8U CN205609233U (en) 2016-02-23 2016-02-23 High fire behaviour cable in security level DCS dish cabinet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620135538.8U CN205609233U (en) 2016-02-23 2016-02-23 High fire behaviour cable in security level DCS dish cabinet

Publications (1)

Publication Number Publication Date
CN205609233U true CN205609233U (en) 2016-09-28

Family

ID=56960262

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620135538.8U Active CN205609233U (en) 2016-02-23 2016-02-23 High fire behaviour cable in security level DCS dish cabinet

Country Status (1)

Country Link
CN (1) CN205609233U (en)

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