CN107331449A - A kind of used in nuclear power station rod control rod position cable and its industrialization quantity-produced method - Google Patents

A kind of used in nuclear power station rod control rod position cable and its industrialization quantity-produced method Download PDF

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Publication number
CN107331449A
CN107331449A CN201710411987.XA CN201710411987A CN107331449A CN 107331449 A CN107331449 A CN 107331449A CN 201710411987 A CN201710411987 A CN 201710411987A CN 107331449 A CN107331449 A CN 107331449A
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China
Prior art keywords
cable
nuclear power
power station
control rod
temperature
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Inventor
张立刚
蒋亚运
蒲守林
洪启付
朱强中
刘成伟
陆权
史佳麟
鲍蕾蕾
展燕
夏同方
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CHANGZHOU BAYI CABLE Co Ltd
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CHANGZHOU BAYI CABLE Co Ltd
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Priority to CN201710411987.XA priority Critical patent/CN107331449A/en
Publication of CN107331449A publication Critical patent/CN107331449A/en
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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
    • H01B7/02—Disposition of insulation
    • H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/145—Pretreatment or after-treatment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/148—Selection of the insulating material therefor
    • 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
    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

Abstract

The invention discloses a kind of used in nuclear power station rod control rod position cable and its industrialization quantity-produced method; cable includes the conductive component that the insulating materials of parcel outside conductor and conductor is constituted; cable is rolled into around packaging material by stranding outside conductor assembly; the wrapped material outer of stranding, which is set, sets cable outer jointing jacket on the outside of cable internal protective cover, cable internal protective cover.Extruder is first passed through headed by production method to extrude polyether-ether-ketone and wrap up conductor formation conductive component, then by conductive component outer wrap stranding around packaging material, then parcel cable internal protective cover and cable outer jointing jacket successively.The present invention, using specific preparation process, makes PEEK meet the rigors of generation Ⅲ nuclear power factory rod control rod position stack top cable by being used as nuclear cables insulating materials from PEEK.The present invention can realize the continuous production operation of industrialization, greatly reduce product rejection rate, improve the qualification rate of final products, while ensure that the stability of final products performance.

Description

A kind of used in nuclear power station rod control rod position cable and its industrialization quantity-produced method
Technical field
This patent is related to a kind of preparation method of cable, and in particular to a kind of used in nuclear power station rod control rod position cable and its Industrialize quantity-produced method.
Background technology
2008, national official approval " large-scale advanced pressurized water reactor nuclear power plant key special subjects general embodiment ", introduce, Digestion and absorb the state-of-the-art Generation Ⅲ in the world on the basis of innovated again, design, build up it is autonomous with China The large-scale advanced pressurized water reactor nuclear power plant demonstration project of intellectual property, forms the advanced nuclear power plant series with China's independent brand. Large-scale advanced pressurized water reactor nuclear power plant key special subjects are《National Program for Medium-to Long-term Scientific and Technological Development (2006-2020)》In It is determined that one of following 16 major scientific and technological projects for striving for 15 years making a breakthrough, are the significant works of innovation-oriented country of China Reconstructs One of journey.
Reactor is the core apparatus of nuclear power station, the control of reactor control rod and position monitoring system (abbreviation rod control rod Position system) it is Complete set of instrument and control system that reactor capability is controlled.It can using manually operated or automatically adjust mode, Adjusted by changing position of the control rod in reactor core or the boron concentration in Core cooling agent or maintenance reaction heap work( Rate.Startup, stopping, power adjusting, neutron flux flattening and the emergency episode shutdown of nuclear power station, are both needed to be used to adjust by control The control rod of reactor capability is saved to realize.It is to be related to one of visual plant of nuclear power station reliability service.
The cable of Rod control and position indication system can be divided into rod control rod position stack top cable and rod control rod position private cable.Rod control rod position heap Top cable is to connect drive mechanism to heap top connecting plate, stick location probe to the cable between the connecting plate of heap top, and rod control rod position is specially Refer to rod control system heap top connector to the cable between rod control system equipment cabinet, rod position system heap top connector to rod with cable Cable between the system data acquisition cabinet of position.
The rod control rod position cable that domestic project is used at present is external import, to cable key technology formation ridge Disconnected, buying and operation cost are extremely high, and later maintenance is difficult, is unfavorable for the sound development of China's Nuclear Electricity, while import Rod control and position indication system cable in contain fluorine or halogen, do not meet the requirement of the cables of nuclear power of China.
Therefore, rod control rod position cable needs to realize the production domesticization of production, realizes Indigenous design, breaks foreign side in this cable Limitation of the aspect to Chinese large-sized advanced pressurized water reactor nuclear power plant development work, walks out the predicament of rod control rod position cable dependence on import, Comprehensive production domesticization of other cables of nuclear power plant is promoted and supported, the localization rate of parts and components of specialty work is improved, China's nuclear power rod control is ensured The supply reliably and with long-term of rod position cable, is that follow-up more advanced nuclear power technology research lays the foundation.
The content of the invention
It is an object of the invention to provide a kind of used in nuclear power station rod control rod position to overcome above the deficiencies in the prior art Cable and its industrialization quantity-produced method, by ad hoc fashion improve industrialized production sustainability and lifting and Stabilize final products performance.
Technical scheme is as follows：
A kind of used in nuclear power station rod control rod position cable, including the insulating materials of parcel is constituted outside conductor and conductor conductive group Cable is rolled into around packaging material by stranding outside part, conductor assembly, the wrapped material outer of stranding sets cable internal protective cover, cable Cable outer jointing jacket is set on the outside of internal protective cover, wherein the insulating materials is polyether-ether-ketone.
Further, described used in nuclear power station rod control rod position cable, the conductor is that the material of described conductor can be Any one in tin-coated copper, silver-plated copper or nickel-clad copper.
Further, described used in nuclear power station rod control rod position cable, the stranding can be polyimides around packaging material.
Further, described used in nuclear power station rod control rod position cable, it is characterised in that stranding is rolled into cable around packaging material Afterwards, outside, which is also set up, sets cable internal protective cover outside screen layer, screen layer.
Further, described used in nuclear power station rod control rod position cable, the material of the screen layer can be tinned copper wire Or silver-gilt copper wire.
Further, described used in nuclear power station rod control rod position cable, the material of the cable internal protective cover can be resistance to spoke According to silicon rubber.
Further, described used in nuclear power station rod control rod position cable, the cable outer jointing jacket can be compiled for stainless steel wire The protective layer knitted.
The industrialized preparing process of above-described used in nuclear power station rod control rod position cable, including first will be poly- by extruder Ether ether ketone is extruded and wraps up conductor formation conductive component, then by conductive component outer wrap stranding around packaging material, then in stranding Wrapped material outer wraps up cable internal protective cover and cable outer jointing jacket successively, and wherein polyether-ether-ketone extrusion comprises the following steps：
Step 1, polyetheretherketonematerials materials are pre-processed：Polyether-ether-ketone is preheated into 4~24h under conditions of 100~160 DEG C；
Step 2, conductor pre-heating：Conductor is preheated under the conditions of 120-250 DEG C；
Step 3, extrude：Using equidistantly not waiting deep screw rod to be extruded, 200-350 DEG C of extruder feeding section temperature melts Melt 300-450 DEG C of section temperature, 300-500 DEG C of homogenizing zone temperature, 350-550 DEG C of head temperature；
Step 4, cool down：Hot-air sub-sectional cooling, first paragraph chilling temperature are used to the polyetheretherketonematerials materials after extrusion 200-350 DEG C, 150-300 DEG C of second segment chilling temperature, 100-250 DEG C of three-stage cooling temperature, temperature during three-stage cooling Degree reduction paragraph by paragraph.
Further, the industrialized preparing process of described used in nuclear power station rod control rod position cable, screw rod described in step 3 Draw ratio is 25:More than 1.
Further, feed segment length in the industrialized preparing process of described used in nuclear power station rod control rod position cable, step 3 For more than 6 times of barrel diameter, melt zone and homogenizing segment length is barrel diameter more than 4 times.
Further, the compression of screw rod in the industrialized preparing process of described used in nuclear power station rod control rod position cable, step 3 Than for 1.5-5.
Further, sub-sectional cooling is adopted in the industrialized preparing process of described used in nuclear power station rod control rod position cable, step 4 Carried out with three-stage heat preservation tank, three-stage heat preservation tank is with heating and temperature control device, and first paragraph heat preservation tank temperature-control range is 200- 350 DEG C, second segment heat preservation tank temperature-control range is 150-300 DEG C, and the 3rd section of heat preservation tank temperature-control range is 100-250 DEG C；Wherein One section of heat preservation tank is scalable, can extend and as far as possible close to cross-head.
Further, the industrialized preparing process of described used in nuclear power station rod control rod position cable, the wrapped material outer of stranding Screen layer, cable internal protective cover and cable outer jointing jacket are wrapped up successively.
In generation Ⅲ nuclear power unit, due to the large batch of increase of the core I ＆C equipment used, and Nuclear Power Station Factory Building space Do not increase, therefore strict requirements are proposed for the miniaturization of Rod control and position indication system product；Simultaneously with conventional domestic rod control Rod position system is compared, the mechanical structure of million kilowatt nuclear power station Rod control and position indication system, main circuit principle, control variable and from Dynamic monitoring function also has higher requirement.
The rod control rod position stack top cable major requirement of generation Ⅲ nuclear power factory：
1) 150 DEG C~200 DEG C of Long-term service temperature；
2) 60 years service life；
3) resistance to irradiation, accumulation irradiation dose 2.75 × 105Gy；
4) poison exponent is not more than 5；
5) abnormal environment humidity：95%；Environmental pressure：103.4kPa；121 DEG C of environment temperature；The operating temperature 150 of conductor ℃；
6) light transmittance is more than 60%；
7) water imbibition；
8) cable positive contraflexure 3 times under 76mm bending radius, jacket surface does not ftracture；Conductor tests logical to conductor voltage Cross (AC 3500V/5 minutes)；
9) cable positive contraflexure 200 times under 165mm bending radius, jacket surface does not ftracture；Conductor is tried conductor voltage Test by (AC 3500V/5 minutes)；
10) outside diameter of cable is as far as possible small；
In order to meet requirements above, the insulating materials for the rod control rod position stack top cable that the present invention is provided has been selected with uniqueness Combination property linear aromatic semicrystalline structure polymeric material PEEK, this material can carry under high temperature and extreme condition It is the optimal thermoplastic of performance generally acknowledged at present for remarkable combination property.
Insulating materials is polyether-ether-ketone (PEEK) characteristic：
1) the remarkable high-temperature stability of polyether-ether-ketone (PEEK), 260 DEG C of Long-term service temperature, 400 DEG C of fusing point；
2) excellent electric property, 10 are kept in wider frequency and temperature range15Ω.cm；
3) chemical resistance, hydrolysis, wear-resisting, high intensity；
4) outstanding anti-flammability and automatic distinguishing ability；
5) it can be produced with thin-walled；
6) PEEK is not fluorine-containing and halogen, low cigarette, low toxicity；
7) excellent radiation-resistant property.
PEEK materials are due to excellent electrical property, the performance that can be played stably as cable insulation material, still Due to the self-characteristic of PEEK materials, the requirement of strict control and extrusion equipment for extrusion is very high, simultaneously because Temperature of the PEEK materials in extrusion is higher, it is easy to which crystallization property is produced not in the forming process affected by environment to material Profit influence so that final products are not up to standard.
PEEK materials are used at present as cable insulation material during cable is prepared, there is material crystalline degree not Enough, service life is not long, and heatproof, pressure-resistant and mechanical performance can not meet the problem of actual cable is used, and it is carried out Industrialized production is even more that difficulty is larger.
The present invention from PEEK by being used as nuclear cables insulating materials, while using specific preparation process, can realize Continuous production operation is industrialized, product rejection rate is greatly reduced, the performance of final products is improved, while ensure that final The continuous production stability of properties of product.
Brief description of the drawings
Fig. 1 is a kind of used in nuclear power station rod control rod position construction of cable schematic diagram that the embodiment of the present invention 1 is provided；
Fig. 2 is another used in nuclear power station rod control rod position construction of cable schematic diagram that the embodiment of the present invention 1 is provided；
Fig. 3 is the used in nuclear power station rod control rod position cable preparation process schematic diagram described in the embodiment of the present invention 2；
In figure 1 above and Fig. 2,1 is conductor, and 2 be insulating barrier, and 3 be packing material, and 4 be twining package tape, and 5 be to be protected in cable Set, 6 be cable outer jointing jacket, and 7 be screen layer, and 8 be leaky line.
Embodiment
Embodiment 1
In the present embodiment, for the requirement that meets generation Ⅲ nuclear power factory rod control rod position stack top cable, there is provided a kind of nuclear power Stand with rod control rod position cable, as shown in figure 1, including conductor 1, insulating barrier 2 is wrapped up in the outside of conductor 1, and conductor 1 and insulating barrier 2 are constituted Conductive component, is needed to be arranged by more than one conductive component according to design, is wrapped up conductive component wherein by twining package tape 4, Filled by packing material in the gap formed between cable main, more than one conductive component that twining package tape 4 is wrapped up；In twining package tape 4 outer wrap cable internal protective cover 5, the outside of cable internal protective cover 5 parcel cable outer jointing jacket 6.
As shown in Fig. 2 being another construction of cable schematic diagram, first wrapped up, shielded using screen layer 7 in the outside of twining package tape 4 Cover the outside of layer 7 and wrap up cable internal protective cover 5 again, wherein being additionally provided with leaky line 8 in screen layer 7.
The used in nuclear power station rod control rod position cable schematic diagram of the two kinds of different structures provided above to the present embodiment, it is therein to lead Body 1 can use any one in tin-coated copper, silver-plated copper, nickel-clad copper, and the insulating materials of insulating barrier 2 uses polyether-ether-ketone, wrapped Polyimides is used around packaging material with 4, cable internal protective cover 5 is using resistance to irradiation silicon rubber material, and cable outer jointing jacket 6 is not The protective layer of rust braided steel wire, screen layer 7 is woven using silver-gilt copper wire or tinned copper wire.
The selection of above structure setting and material, meets claimed below：
(1) in order to meet 150~200 DEG C of operating temperature, from any one in tin-coated copper, silver-plated copper, nickel-clad copper, and And be concentric stranding, it is ensured that cable possesses certain flexibility, is easy to lay.To prevent conductor from jumping creek in technique, conductor will Seek rounding, it is ensured that the smooth development of the insulating exruded technique in rear road.
(2) insulating materials is polyether-ether-ketone (PEEK), on the one hand ensure that the electric property and fire resistance of cable, another Aspect enhances the radiation-resistant property and heat-resisting quantity of cable again, meets running environment requirement of the cable in nuclear power station.Meanwhile, Mechanical performance, radiation-resistant property and the electrical property of high-quality also ensure that generation Ⅲ nuclear power factory rod control rod position stack top cable in harshness (150~200 DEG C of cable conductor maximum operating temperature, accumulation irradiation dose 2.75 × 10 under running environment requirement5Gy.) 60 years The desired design life-span.
(3) because cable in 60 year phase in longevity inner wire operating temperature is 150~200 DEG C, in rod control rod position during cable cabling Select around packaging material be resistant to elevated temperatures polyamide tape.
(4) in order to ensure cable ensured the shield effectiveness of cable within 60 year phase in longevity, polymeric barrier layer materials have selected silver-plated copper Silk or tinned copper wire braiding.
(5) cable internal protective cover will possess good heat resistance, radiation-resistant property, fire resistance, mechanical performance, select The silastic material of resistance to irradiation type, especially phenyl siloxane rubber material, this material are extraordinary resistance to because the presence of phenyl has Irradiation behaviour, while the base material of silicon rubber has good heat resistance again.
(6) due to the use environment requirement of rod control rod position cable, under unusual service condition and design basis accident, cable must not There is fragment generation, the internal protective cover of cable there must be integrality.
Required according to the use environment of cable, the outer jointing jacket of rod control rod position cable is one layer of stainless steel wire of braiding, is examined Consider the bending radius of cable, stainless steel wire selection is 304L types, uniform during braiding, angle control is appropriate, meets 90% Count, the problems such as must not having skylight, burr.
In combustion, the stainless steel wire of outer layer has good heat-insulated and heat transfer property to cable, it is ensured that cable leads to Cross IEC60332-3-23B class bunched burning tests.Stainless steel wire can shield the radiation that scene is run with transmitting portions simultaneously, The irradiation dose that bears of reduction cable internal material, it is ensured that cable desired design life-span of 60 years under high radiation environment.
In addition, stainless steel wire has good mechanical performance, the anti-wear performance and mechanical performance of cable are improved, meets rod Control laying and periodic maintenance requirement for rod position cable.
Embodiment 2
A kind of industrialized preparing process of the used in nuclear power station rod control rod position cable described in embodiment 1 is present embodiments provided, Polyether-ether-ketone is extruded and wrapped as shown in figure 3, first passing through extruder headed by the process of industrialized production by the preparation flow of the cable Wrap up in conductor formation conductive component, then by conductive component outer wrap stranding around packaging material, then the wrapped material outer of stranding according to Secondary parcel cable internal protective cover and cable outer jointing jacket.
Because the fusing point of PEEK materials is up to 340~400 DEG C, viscosity is big after material molten, and mobility is slow, general extrusion Equipment does not reach required extrusion temperature, it is therefore necessary to suitable high temperature extrusion equipment is selected, while selection, mould in screw rod There should be strict requirements in terms of the design of tool, the setting of extrusion temperature, the setting of cooling bath temperature.
The extrusion of PEEK materials uses following steps：
Step 1, polyetheretherketonematerials materials are pre-processed：By polyether-ether-ketone temperature be 100~160 DEG C under conditions of preheating 4~ The 24h times；
Step 2, conductor pre-heating：Conductor is preheated under the conditions of 120-250 DEG C；
Step 3, extrude：Using equidistantly not waiting deep screw rod to be extruded, 200-350 DEG C of extruder feeding section temperature melts Melt 300-450 DEG C of section temperature, 300-500 DEG C of homogenizing zone temperature, 350-550 DEG C of head temperature；
Step 4, cool down：Hot-air sub-sectional cooling, first paragraph chilling temperature are used to the polyetheretherketonematerials materials after extrusion 200-350 DEG C, 150-300 DEG C of second segment chilling temperature, 100-250 DEG C of three-stage cooling temperature, temperature during three-stage cooling Degree reduction paragraph by paragraph.Because PEEK temperature is high, solid-state is changed into from liquid immediately from mould, intensity is big, and viscosity is big, hardly possible cleaning.Therefore can So that using tune squash type core rod die sleeve is exempted from, finish processing or plating Teflon are done in core rod die sleeve surface.Die sleeve external demand die sleeve frame, mould The outer having heaters of stock, heater wants 360 degree without dead angle heating, and core rod die sleeve temperature general control is at 350-550 DEG C；Due to PEEK fusing points are high, and melt viscosity is big, and flowing velocity is slow, to mould apart from general control in 1-8 millimeters, core rod outside cone angle and die sleeve The difference of cone angle should be between 2 ° -8 °.
Above extruder does not wait deep Screw Extrusion using equidistant, and the draw ratio of screw rod is 25:More than 1, the compression of screw rod Than for 1.5-5, charging segment length is more than 6 times of barrel diameter, melt zone and homogenizing segment length for 4 times of barrel diameter with On.
Hot-air sub-sectional cooling can be carried out in commercial process using three-stage heat preservation tank in above step 4, and three Segmentation heat preservation tank is with heating and temperature control device, and first paragraph heat preservation tank temperature-control range is 200-350 DEG C, second segment heat preservation tank temperature control Scope is 150-300 DEG C, and the 3rd section of heat preservation tank temperature-control range is 100-250 DEG C；Wherein first paragraph heat preservation tank is scalable, Neng Goushen Grow and try one's best close to cross-head.
The moisture in air, especially plum rain season can be absorbed due to PEEK, the PEEK of moisture is absorbed in the barrel of high temperature Become gas, cause insulation substantial amounts of gas occur and satisfy, reduce PEEK mechanical performance and electrical property, cause product unqualified. PEEK materials processing temperatures are high, and viscosity is high, and intensity is high, so cleaning equipment takes consumptive material, general cleaning equipment needs 6 to 12 are small When, while PEEK is before extrusion due to its material and extraneous Long Term Contact, if directly carrying out heating extrusion, it is easy to so that production Product produce unstability, in subsequent production, and plasticizing capacity declines, and continuous production is poor, easily produce particle and blackspot, product Scrappage is high, low production efficiency.Therefore in the production process that the present invention is provided, first by prolonged heat pre-treatment, make Obtain PEEK to be fully heated, PEEK is fully dried, remove the moisture in PEEK；Another aspect preprocessing process equivalent to The preheating process of follow-up extrusion step so that the treatment characteristic of material is stablized in advance, improves the plasticizing homogeneity of material, promotees The operation that subsequently can be continuously produced is entered, the stabilization simultaneously for final products performance plays an important role.
The PEEK extrusions of preheating purpose in to(for) conductor is that temperature is dashed forward during in order to prevent that conductor from passing through extrusion die So rise, produces larger stress, hinders the crystallization process of PEEK materials, influences the electric and physical property of material.Therefore it is right Preheating is carried out in conductor and further increases the plasticity of material extrusion and the concertedness of process, it is ensured that product quality.
If using the conventional type of cooling, easily in the spherocrystal of wire surface formation skewness after PEEK extrusions； PEEK leaves head temperature rapid drawdown, easily forms noncrystalline；PEEK crystallinity is greatly reduced, causes mechanical performance to decline, Easily occurs stress cracking.Crystallinity has a strong impact on PEEK mechanical performance, electrical property, irradiation behaviour.Non- sufficient crystallising PEEK be it is transparent, the PEEK of sufficient crystallising be it is cream-coloured, it is opaque.The PEEK of non-sufficient crystallising will continue at a suitable temperature Crystallization, that is to say, that the PEEK insulated wires of non-sufficient crystallising, quality is unstable, and quality is uncontrollable.Meanwhile, even if logical Cross and subsequently recrystallizing the PEEK of non-sufficient crystallising, but be due to that the particularity and material of PEEK material properties is molded Integraty, it is follow-up recrystallize after there are still quality it is unstable the problem of, its performance and disposable sufficient crystallising after extrusion Properties of product afterwards still suffer from very big difference.
PEEK is heated from solid-state by barrel is changed into transparent liquid, and transparent liquid PEEK is through mould molding in conductor On, PEEK transparent on conductor is extruded in also without sufficient crystallising, so having to pass through heat preservation tank crystallization, could to obtain quality steady Fixed PEEK insulated electric conductors.Because PEEK temperature is high, the PEEK from mould should be to enter first paragraph heat preservation tank, first with a distance from most short Section heat preservation tank is scalable, and as far as possible close to cross-head, and then ensure that the PEEK from mould is directly entered insulation to greatest extent Groove.First paragraph heat preservation tank shrinks when tearing head open, is easy to tear head open, stretches out and is tried one's best close to machine when extruder is normally run Head.Heat preservation tank material should be able to adapt to long-term work under 100-350 DEG C of hot conditions.PEEK can be crystallized fully after the extrusion, Directly determine the quality of final products, therefore the setting that the present invention passes through heat preservation tank so that can be in insulation after PEEK extrusions Sufficient crystallising is reached in groove, it is ensured that the premium properties of final cable.
Performance excellent PEEK, will originate from its semi-crystalline characteristic, when PEEK crystallinity is 25% to 35%, respectively Plant performance optimal.
The present invention is in research process, and the pre-heat treatment and final PEEK do not use guarantor after extruding before being extruded for PEEK Warm groove processing, finally can not obtain the PEEK products of 25% to 35% crystallinity.The PEEK products of low-crystallinity can not be met Rigors of the generation Ⅲ nuclear power factory to rod control rod position stack top cable.Not only mechanical performance is serious by the especially PEEK of low-crystallinity Reduction, and easily occur stress cracking.Unstable product quality, quality is uncontrollable.
The PEEK products produced by the preparation method of the present invention carry out performance test and show that PEEK crystallinity reaches More than 31%.The insulaion resistance tested at 20 DEG C, has reached more than 130000M Ω km, tensile strength reached 70MPa with On；Accumulation irradiation dose 5 × 106Gy, performance is qualified.Heat aging performance is excellent, 260 DEG C, after the heat ageing of 8000 hours, machinery Obvious change does not occur for intensity.Above performance will to the harshness of rod control rod position stack top cable considerably beyond generation Ⅲ nuclear power factory Ask.
The present invention not only realizes the continuous production of industrialization, effectively reduces waste product；And it is following wider for new material PEEK Wealthy application field has established solid foundation.

Claims (13)

1. a kind of used in nuclear power station rod control rod position cable, it is characterised in that include the insulating materials structure of parcel outside conductor and conductor Into conductive component, cable is rolled into around packaging material by stranding outside conductor assembly, the wrapped material outer of stranding is set in cable Cable outer jointing jacket is set on the outside of protective case, cable internal protective cover, wherein the insulating materials is polyether-ether-ketone.
2. used in nuclear power station rod control rod position according to claim 1 cable, it is characterised in that the conductor is described conductor Material be tin-coated copper, silver-plated copper or nickel-clad copper in any one.
3. used in nuclear power station rod control rod position according to claim 1 cable, it is characterised in that the stranding is poly- around packaging material Acid imide.
4. used in nuclear power station rod control rod position according to claim 1 cable, it is characterised in that stranding is rolled into cable around packaging material Afterwards, outside, which is also set up, sets cable internal protective cover outside screen layer, screen layer.
5. used in nuclear power station rod control rod position according to claim 4 cable, it is characterised in that the material of the screen layer is plating Tin copper wire or silver-gilt copper wire.
6. used in nuclear power station rod control rod position according to claim 1 cable, it is characterised in that the material of the cable internal protective cover Matter is the silicon rubber of resistance to irradiation.
7. used in nuclear power station rod control rod position according to claim 1 cable, it is characterised in that the cable outer jointing jacket is not The protective layer of rust braided steel wire.
8. the industrialized preparing process of the used in nuclear power station rod control rod position cable described in claim 1, it is characterised in that including first Polyether-ether-ketone is extruded by extruder and conductor formation conductive component is wrapped up, it is then that conductive component outer wrap stranding is wrapped Material, then cable internal protective cover and cable outer jointing jacket are wrapped up successively in the wrapped material outer of stranding, wherein polyether-ether-ketone is extruded Comprise the following steps：
Step 1, polyetheretherketonematerials materials are pre-processed：Polyether-ether-ketone is preheated into 4 ~ 24h under conditions of 100 ~ 160 DEG C；
Step 2, conductor pre-heating：Conductor is preheated under the conditions of 120-250 DEG C；
Step 3, extrude：Using equidistantly the deep screw rod of grade is not extruded, 200-350 DEG C of extruder feeding section temperature, melt zone 300-450 DEG C of temperature, 300-500 DEG C of homogenizing zone temperature, 350-550 DEG C of head temperature；
Step 4, cool down：Hot-air sub-sectional cooling, first paragraph chilling temperature 200-350 are used to the polyetheretherketonematerials materials after extrusion DEG C, 150-300 DEG C of second segment chilling temperature, 100-250 DEG C of three-stage cooling temperature, temperature drops paragraph by paragraph during three-stage cooling It is low.
9. the industrialized preparing process of used in nuclear power station rod control rod position according to claim 8 cable, it is characterised in that step The draw ratio of screw rod described in 3 is 25:More than 1.
10. the industrialized preparing process of used in nuclear power station rod control rod position according to claim 8 cable, it is characterised in that step The segment length that fed in rapid 3 is more than 6 times of barrel diameter, melt zone and homogenizing segment length is barrel diameter more than 4 times.
11. the industrialized preparing process of used in nuclear power station rod control rod position according to claim 8 cable, it is characterised in that step The compression ratio of screw rod is 1.5-5 in rapid 3.
12. the industrialized preparing process of used in nuclear power station rod control rod position according to claim 8 cable, it is characterised in that step Sub-sectional cooling is carried out using three-stage heat preservation tank in rapid 4, and three-stage heat preservation tank is with heating and temperature control device, first paragraph heat preservation tank Temperature-control range is 200-350 DEG C, and second segment heat preservation tank temperature-control range is 150-300 DEG C, and the 3rd section of heat preservation tank temperature-control range is 100-250℃；Wherein first paragraph heat preservation tank is scalable, can extend and as far as possible close to cross-head.
13. the industrialized preparing process of used in nuclear power station rod control rod position according to claim 8 cable, it is characterised in that into The wrapped material outer of cable wraps up screen layer, cable internal protective cover and cable outer jointing jacket successively.
CN201710411987.XA 2017-06-05 2017-06-05 A kind of used in nuclear power station rod control rod position cable and its industrialization quantity-produced method Pending CN107331449A (en)

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Publication number Priority date Publication date Assignee Title
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CN102394120A (en) * 2011-09-28 2012-03-28 江苏阳湖电缆有限公司 Radiation cross-linked polyetheretherketone extruded insulation aluminum alloy round winding wire and process thereof
CN202339733U (en) * 2011-11-08 2012-07-18 上海特缆电工科技有限公司 Reactor rod-position and rod-control cable for nuclear-reactor driving mechanism
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Application publication date: 20171107