CN105427924A - Long-lifetime ready-made branch cable and production method thereof - Google Patents
Long-lifetime ready-made branch cable and production method thereof Download PDFInfo
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- CN105427924A CN105427924A CN201510980862.XA CN201510980862A CN105427924A CN 105427924 A CN105427924 A CN 105427924A CN 201510980862 A CN201510980862 A CN 201510980862A CN 105427924 A CN105427924 A CN 105427924A
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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
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- 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
- H01B13/003—Apparatus or processes specially adapted for manufacturing conductors or cables using irradiation
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- 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
- H01B13/141—Insulating conductors or cables by extrusion of two or more insulating layers
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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
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0216—Two layers
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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
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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
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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
- H01B7/187—Sheaths comprising extruded non-metallic layers
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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
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
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Abstract
The invention discloses a long-lifetime ready-made branch cable and a production method thereof. The cable comprises a main cable and a branch cable, which are fabricated into a whole in an injection molding manner, wherein the main cable is connected with the branch cable through a connecting body; a wrapping layer is arranged at the connected part of the main cable and the branch cable; and a reinforced layer is arranged at an interface of the wrapping layer, the main cable and the branch cable. The mechanical property and the irradiation resistance of the cable are improved by a domestic advanced irradiation crosslinking technology. A dual-layer co-extrusion technology which is independently researched and developed by our company is adopted as an insulating extrusion technology; the mechanical property of the cable is ensured; and the electrical properties of the cable are also improved, so that the long-lifetime effect of the cable is reached. The cable disclosed by the invention is long in lifetime, is constructed once, and does not need to change; the maintenance cost and the change cost of the cable can be reduced; and the cable is simple to lay, convenient and fast to install and low in demands on operating environment, can be directly laid in a cable trench and a special cable shaft of a building, can also be laid in different cable bridges, and is low in labor intensity of installation and short in construction period.
Description
Technical field
The present invention relates to cable, be specifically related to long-life pre-branched cable and production method thereof.
Background technology
Pre-branched cable is external a large amount of a kind of New Low Voltage electric power system used in recent years, can be widely used in supply line the occasion having cable branch.As skyscraper and conventional residential housing, heavy construction and venue, standardization factory building, mobile device and machinery, Industrial Stoves, highway, bridges and culverts, airport etc.Connect with traditional cable branch and compare with modes such as plug type bus ducts, have that reliability is high, the advantage such as simple installation, environmental requirement are low, non-maintaining, be a kind of cable product meeting modern architecture and modern industry facility requirements.The cable specification that pre-branched cable requires according to user and length, and the position of joint on main cable that branch line cable is connected with main cable, in factory, main cable (hereinafter referred to as leader cable) and branch line cable (hereinafter referred to as branch cable) are carried out the joint of conductor and the insulation processing of joint by cables manufacturing manufacturer, after the detection of line correlation of going forward side by side and test, send to user.User need not carry out process and the detection of branch joint again when cable laying is installed, can directly be carried out being connected with supply line or adapted electricity facility by cable using.Because branch joint is made in advance completely in factory, therefore meaning is " pre-branched cable ".It is reliable that pre-branched cable has stable connection, waterproof and dampproof, corrosion-resistant, the remarkable advantages such as acidic fog resistance, anti-vibration, bending radius are little, and greatly can alleviate labour intensity when circuit is installed, and shortens construction period, reduce project cost.Due to leader cable conductor non junction, ensure that continuity, decrease fault point, is the favorable substitutes of the distribution systems such as the more plug type bus duct of current domestic use, can replace plug type bus duct evil under most of application scenario completely.
The company standard of pre-branched cable have references to Japanese JCS376A standard and IEC60502 standard and works out, and absorption and digestion advanced foreign technology and manufacturing process, product performance index and model specification etc. have more expansion.Leader cable and branch cable core are produced according to our company's company standard being equivalent to IEC60502, technical performance reach comprehensively and part higher than the requirement of IEC60502.Strict standard-required and strict Performance Detection ensure that the quality of product.
Pre-branched cable is generally about 25 years useful life long-life now, but Building life cycle is 70 years, wherein change cable and can produce the loss such as human and material resources, financial resources again, the useful life in house and the time in useful life of cable are not inconsistent, so my company now researches and develops a kind of long-life pre-branched cable.
Summary of the invention
The object of this invention is to provide a kind of life-span long, pre-branched cable that can be effectively waterproof and dampproof, has the same life-span with building, use safety, easy for installation, the features such as low-smoke non-halogen flame-retardant.
In order to reach above-mentioned purpose, the present invention adopts following technical scheme:
Pre-branched cable, comprise the leader cable and branch cable that are injected into one, leader cable connects branch cable by connected body, and the connection place of leader cable and branch cable is provided with integument, and integument is provided with cable reinforced layer at the interface with leader cable and branch cable; Reinforced layer is that low cigarette is without fire retardant polyolefin injection molding material.
Leader cable comprises at least two core cable cores, sheath is provided with outside cable core, conductor in cable core is around ground floor belting layer, insulating barrier and second layer belting layer, and cable core Cheng Lanhou wraps up third layer belting layer, between cable core and sheath, be provided with packed layer, restrictive coating and reinforced layer successively from inside to outside; Employing belting layer is wrapped, and the melt temperature of belting layer determines working temperature higher than cable maximum amount, and whole cable intensity is good, and cable roundness is good.
Further, wire is copper conductor, strandedly forms, and conductor conducts electricity very well.
Further, described ground floor belting layer, described second layer belting layer are mylar tape, described 3rd belting layer is that low cigarette is without inhibiting tape, described jacket layer material is irradiation crosslinking halogen-free low-smoke flame-proof polyolefin, prevent cable aging and effective electric property increasing cable, described jacket layer material is irradiation crosslinking halogen-free low-smoke flame-proof polyolefin.
Further, branch cable cable core is identical with the structure between leader cable cable core and sheath with the structure between sheath.
Further, described insulating barrier comprises two-layer, and the material of inner insulating layer is low smoke, zero halogen IXPE, and the material of outer insulation is low smoke, zero halogen cross-linking radiation polyolefin, dielectric layers adopts double-layer coextrusion, helps the electrical property and the mechanical performance that increase cable core.
Further, waterproof insulation tape is provided with in described connection place.
Further, described connected body is conductor wire clamp.
Further, be provided with reinforced layer at described connected body place, outside reinforced layer, be provided with watertight composition.
The production method of pre-branched cable, comprises the following steps:
1) manufacture leader cable and branch cable, wherein adopt two cover plastic extruding machines to open simultaneously, extrusion head shares and a set ofly realizes dielectric layers and extrude together, and to inner insulating layer and the process of outer insulation cross-linking radiation;
2) by connected body the wire in branch cable be connected with the wire in leader cable and fix;
3) integument of injection molding machine leader cable and branch cable connection place is adopted.
Further, described step 1) concrete steps as follows:
1) at the outer wrapped ground floor belting layer of conductor;
2) adopt two cover plastic extruding machines to open, extrusion head shares and a set ofly realizes dielectric layers and extrude together simultaneously:
Before extruding, inner insulating layer material is dried setting-up time at a set temperature, conductor pre-heating is to 90 DEG C ~ 100 DEG C;
During extruding, plastic extruding machine for extruding inner insulating layer adopts common screw, the temperature of inner insulating layer material controls between 140 DEG C ~ 185 DEG C, and adopt low compression ratio screw rod for the plastic extruding machine extruding outer insulation, the temperature of outer insulation controls between 90 DEG C ~ 175 DEG C;
After extruding, segmented cooling means is adopted to cool;
3) to inner insulating layer and the process of outer insulation cross-linking radiation;
4) after cooling, at the outer wrapped second layer belting layer of outer insulation;
5) many cable core symmetries are placed, stranding, parcel third layer belting layer;
6) filler is set outside third layer belting layer, adopts half to squeeze tubular type and extrude restrictive coating and cool;
7) at the arranged outside cable reinforced layer of restrictive coating, and waterproof insulation tape is wound around.
The invention has the beneficial effects as follows:
(1) compact conformation of the present invention, good stability, restrictive coating adopts low smoke, zero halogen radiation property cross-linked polyolefin, radiation-resistant property and good mechanical performance, outer and the conductor of core adopts belting layer wrapped outward, the melt temperature of belting layer determines working temperature higher than cable maximum amount, whole cable intensity is good, and cable roundness is good, is applicable to compared with high ambient temperature and the bad operational environment that dispels the heat;
(2) conductor outer wall adopts inside and outside double hyer insulation, and improve cable insulation, ensure that reliable electrical property, use procedure is more stable;
(3) the outer wrapped one deck mylar tape of conductor and core, mylar tape this to having resistance to elevated temperatures, when cable carries out simulation accelerated heat ageing, effectively can prevent the adhesion of core and the oxidation of control conductor; After the wrapped mylar tape of core, the cable electrical property caused because of core adhesion can be avoided to decline, also effectively can improve cable life, the useful life of cable can be ensured from configuration aspects further;
(4) conductor is stranded forming, and conductor conducts electricity very well;
(5) irradiation crosslinking halogen-free low cigarette polyethylene inner insulating layer is high temperature resistant and aging, low smoke, zero halogen environmental protection, protection core is injury-free, extend power cable useful life, and irradiation crosslinking halogen-free low cigarette polyolefin external insulation layer has excellent mechanical performance, radiation-resistant property;
(6) adopt the low cigarette polyolefin jacket material of irradiation crosslinking halogen-free, material forms thermosets after cross-linking radiation, ensures the useful life of power cable and the radiance of gamma ray resistant;
(7) external insulation layer is through double-layer coextrusion processes, and efficiency is high, energy consumption is low, avoid aliquation between restrictive coating and insulating barrier, wrinkling, come unstuck and core and the untight defect of insulated combination;
(8) in production stage, inner insulating layer and external insulation layer and restrictive coating adopt the low cigarette of irradiation crosslinking halogen-free, insulate in cross-linking radiation process not with contact with moisture, and then decrease cable and mix because of moisture the probability causing electrical performance issues; Cross-linking radiation is specially adapted to the production of producing special cable, by high-power electron beam, modification is carried out to insulating material, high-energy ray destroys and makes original linear c h bond, then molecular structure reconfigures again, form random network molecular structure, improve mechanical and physical performance and the heat resistance of material, electrical property is also increased.Because this material adopts to carry out irradiation with high energy electron ray to organic thermoplastic and make it be transformed into 3 D stereo cross-linked network by linear polymeric. be namely converted into insoluble molten hot solid matter with thermoplasticity, improved physical and mechanical properties, and cross-linking radiation mode can be avoided being destroyed low smoke and zero halogen characteristic by chemical crosslinking.
(9), head place of cable pre-branch adopts adhesive waterproof tape, thus adds the insulation property of cable waterproof performance and cable.
(10), leader cable and branch cable adopt reinforced layer in the contact position, two ends of integument, thus make cable branch place more firmly and waterproof.
(11) the cable long service life, in the present invention, once constructs, and without the need to changing, can reduce maintenance cost and the renewal cost of cable.
(12), lay simply, it is convenient to install, environment for use requires low, in the private cable vertical shaft can directly be laid in cable trough, building, also can be laid in different cable testing bridges, installation accuracy is low, installs labour intensity little, short construction period, when only having enclosed busbar groove to install 1/10th.
(13), there is excellent shock resistance, good air-tightness, water proofing property, can run by normal power supply in a humid environment, and also can be laid in outdoor and be embedded in soil, fire safe type pre-branched cable, when burning, keeps the normal transmission operation of 90Min.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of branch cable in the present invention;
Wherein: 1, leader cable 2, branch cable 3, connected body 4, reinforced layer.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention.
With reference to accompanying drawing 1, leader cable 1, conductor is outer and insulation is outer all adopts the wrapped technology of band, and the insulation of leader cable 1 is external insulation double-layer coextrusion, and sheath adopts the low-smoke flame-retardant polyolefin sheathed material of irradiation crosslinking halogen-free; Branch cable 2, the insulation of branch cable 2 is similarly inside and outside double-layer coextrusion, and sheath adopts the low-smoke flame-retardant polyolefin sheathed material of irradiation crosslinking halogen-free.Connected body 3, cable connection body adopts injection moulding branch, and this sample improves security performance and the electric property of cable, and cable connection body injection molding material is low-smoke halogen-free polyolefin injection molding material.Reinforced layer 4, reinforced layer 4 does not tightly serve the effect of fixing leader cable branch cable but also effectively adds waterproof effect and the protective effect of cable.
In the present embodiment, conductor is copper conductor.
In the present embodiment, inner insulating layer is by the low cigarette polyethylene of irradiation crosslinking halogen-free, high temperature resistant and aging, low smoke, zero halogen environmental protection, and protection core is injury-free, extend power cable useful life; External insulation layer is the low cigarette polyolefin of irradiation crosslinking halogen-free, makes power cable have very good mechanical properties, radiation-resistant property.Interior insulation adds the electric property of cable, and external insulation adds the mechanical performance of cable.
In the present embodiment, restrictive coating is formed by low smoke, zero halogen cross-linking radiation polyolefin, the features such as polyolefin has that anti-cracking performance is excellent, thermal contraction is little, easy processing, taste are little, LSOH anti-flaming and long service life, make power cable resistance to y irradiation behaviour strong, ensure that power cable useful life.
In the present embodiment, ground floor belting layer and second layer belting layer are non-hygroscopic mylar tape, non-hygroscopic mylar tape performance can stable for extended periods of time, the insulation resistance of effective guarantee product, and can barrier metal ion to external migration, be conducive to the Heat Ageing delaying jacket layer material; Integument forms by non-hygroscopic LSOH anti-flaming film strip is wrapped, can not melting under power cable maximum amount determines working temperature.
In the present embodiment, have employed low smoke halogen-free flame-retardant polyolefin injection molding material reinforced layer and waterproof insulation tape in the end of the joint of integument and leader cable 1 and branch cable 2.This strengthens the mechanical performance adding branch cable, makes the structure of cable branch layer point more firm, and increase waterproof insulation tape makes the water resistance of cable and electrical property more obtain protection.
In the present embodiment, cable double hyer insulation and sheath adopt double-layer coextrusion technology, and this technology is the extrusion head of my company's independent research.But this technology adopts two cover plastic extruding machine extrusion heads to adopt a set of, when cable plastic extrusion is produced, two overlap plastic extruding machine and open simultaneously, and extrusion head adopts a set of, and cable can be extruded together in two-layer insulation, thus reaches the electrical property and mechanical performance that increase core.
Irradiation crosslinking technological in this example, through electron beam (EB) RADIATION PROCESSING of electron accelerator, material will be converted into tridimensional network by linear polymer, and its degree of cross linking size and uniformity thereof are closely-related with the transmitting device under the electron beam of accelerator.
The production method of long-life pre-branched cable, comprise the steps: the wrapped belt-inner insulating layer of conductor strand-conductor and external insulation layer extrude-inner insulating layer and the external insulation layer cross-linking radiation process-wrapped-core stranding-restrictive coating that insulate extrude-restrictive coating cross-linking radiation process.Inner insulating layer and external insulation layer Thickness Ratio are 1:3.
In the present embodiment, the hot elongation of inner insulating layer and external insulation layer, restrictive coating is not more than 80%.
Conductor strand:
Conductor adopts copper conductor, and cable conductor should meet the corresponding requirements in GB/T3956-2008 standard.
Conductor is wrapped:
Conductor is wrapped, and to select the band of corresponding width to carry out according to different size conductor diameter wrapped, and the wrapped rate of putting up is not less than 50%.
Inner insulating layer and external insulation layer extrude:
Long-life cable adopts double-layer coextrusion technology, and interior insulation adopts IXPE Insulation Material, and external insulation adopts irradiation crosslinking halogen-free low-smoke flame-proof polyolefin Insulation Material.
Inner insulating layer and external insulation layer adopt double-layer coextrusion.Interior insulating exruded employing common screw, external insulation is extruded and is adopted low compression ratio screw rod, before insulation extrusion, 10mm
2should be preheating to 90 ~ 100 DEG C with lower conductor, insulating material should dry 1 ~ 2 hour at 60 ± 5 DEG C, and core adopts segmented cooling, first paragraph cooling water temperature 60 DEG C ~ 70 DEG C, and second segment cooling water temperature is normal temperature; Restrictive coating 8 adopts low compression ratio screw rod extruding on unit to go out with half tubular molding tool, and 60 ± 5 DEG C of preheatings 1 ~ 2 hour answered by material before extruding, and extrude the cooling of rear employing segmented, first paragraph cooling water temperature 60 DEG C ~ 70 DEG C, second segment cooling water temperature is normal temperature.Double-layer coextrusion is realized by time processing, the link repeatedly regulating core bias is not needed in production process, ensure that insulation thickness is accurate, herewith once extrude can avoid due to extrude for twice separately carry out time the inner insulating layer surface problem being polluted and damage, inner insulating layer and external insulation layer are combined tight, ensure that the concentricity of inner insulating layer and external insulation layer, improve the quality of products, reduce processing intensity, compactness between double-decker, makes the electric property of power cable have more advantage.
Inner insulating layer and external insulation layer sheath crosslinking Treatment:
Inner insulating layer, high temperature resistant, anti-aging, protection core is injury-free; External insulation layer adopts crosslinked oil resistant long-life fire retardant polyolefin to form, and has LSOH anti-flaming environmental protection characteristic; The hot elongation of inner insulating layer is not more than 80%.The high-energy ray utilizing electron accelerator to produce makes insulating material be cross-linked, and improves the physical and mechanical properties of cable, electrical insulation properties.
Insulate wrapped:
Adhesion during for preventing insulation accelerated heat ageing, the outer wrapped one deck non-hygroscopic mylar tape of insulation, the rate of putting up controls at 15%-20%.
Core stranding:
Stranding fills out core filling and the wrapped formation belting layer of non-hygroscopic LSOH anti-flaming film strip with extruding cast, and band puts up rate should not be less than 30%.Core and fill out core stranding lay ratio 15-20, ensures cable roundness.
Restrictive coating extrudes:
Adopt low compression ratio screw rod to extrude with half tubular molding tool extruding on unit, 60 ± 5 DEG C of preheatings 1 ~ 2 hour answered by material before extruding, extrude rear employing segmented and cool, first paragraph cooling water temperature 60 DEG C ~ 70 DEG C, second segment cooling water temperature is normal temperature.
The process of restrictive coating cross-linking radiation:
Restrictive coating is formed by low smoke, zero halogen cross-linking radiation polyolefin, and hot elongation is not more than 80%.
Power cable test of the present invention has following performance:
Each test performance of table 1 cable
By above digital proof, the performance of pre-branched cable is protected, and can meet building and use, long service life.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. long-life pre-branched cable, it is characterized in that, comprise the leader cable and branch cable that are injected into one, leader cable connects branch cable by connected body, the connection place of leader cable and branch cable is provided with integument, and integument is provided with cable reinforced layer at the interface with leader cable and branch cable;
Leader cable comprises at least two core cable cores, sheath is provided with outside cable core, conductor in cable core is around ground floor belting layer, insulating barrier and second layer belting layer, and cable core Cheng Lanhou wraps up third layer belting layer, between cable core and sheath, be provided with packed layer, restrictive coating and reinforced layer successively from inside to outside.
2. pre-branched cable as claimed in claim 1, it is characterized in that, described ground floor belting layer, described second layer belting layer are mylar tape, described 3rd belting layer be low cigarette without inhibiting tape, described jacket layer material is irradiation crosslinking halogen-free low-smoke flame-proof polyolefin.
3. pre-branched cable as claimed in claim 1, it is characterized in that, branch cable cable core is identical with the structure between leader cable cable core and sheath with the structure between sheath.
4. the pre-branched cable as described in claim 1 or 2 or 3, it is characterized in that, described insulating barrier comprises two-layer, and the material of inner insulating layer is low smoke, zero halogen IXPE, and the material of outer insulation is low smoke, zero halogen cross-linking radiation polyolefin.
5. the pre-branched cable as described in claim 1 or 2 or 3, is characterized in that, be provided with waterproof insulation tape in described connection place.
6. the pre-branched cable as described in claim 1 or 2 or 3, is characterized in that, described connected body is conductor wire clamp.
7. the pre-branched cable as described in claim 1 or 2 or 3, is characterized in that, is provided with reinforced layer, outside reinforced layer, is provided with watertight composition at described connected body place.
8. the production method of the pre-branched cable according to any one of claim 1-7, is characterized in that, comprises the following steps:
1) manufacture leader cable and branch cable, wherein adopt two cover plastic extruding machines to open simultaneously, extrusion head shares and a set ofly realizes dielectric layers and extrude together, and to inner insulating layer and the process of outer insulation cross-linking radiation;
2) by connected body the wire in branch cable be connected with the wire in leader cable and fix;
3) integument of injection molding machine leader cable and branch cable connection place is adopted.
9. production method as claimed in claim 8, is characterized in that, described step 1) concrete steps as follows:
1) at the outer wrapped ground floor belting layer of conductor;
2) adopt two cover plastic extruding machines to open, extrusion head shares and a set ofly realizes dielectric layers and extrude together simultaneously:
Before extruding, inner insulating layer material is dried setting-up time at a set temperature, conductor pre-heating is to 90 DEG C ~ 100 DEG C;
During extruding, plastic extruding machine for extruding inner insulating layer adopts common screw, the temperature of inner insulating layer material controls between 140 DEG C ~ 185 DEG C, and adopt low compression ratio screw rod for the plastic extruding machine extruding outer insulation, the temperature of outer insulation controls between 90 DEG C ~ 175 DEG C;
After extruding, segmented cooling means is adopted to cool;
3) to inner insulating layer and the process of outer insulation cross-linking radiation;
4) after cooling, at the outer wrapped second layer belting layer of outer insulation;
5) many cable core symmetries are placed, stranding, parcel third layer belting layer;
6) filler is set outside third layer belting layer, adopts half to squeeze tubular type and extrude restrictive coating and cool;
7) at the arranged outside cable reinforced layer of restrictive coating, and waterproof insulation tape is wound around.
10. production method as claimed in claim 8, is characterized in that, described step 2) in after leader cable and branch cable are fixed, reinforced layer is set in the two connection place, outside reinforced layer, is surrounded with adhesive waterproof tape.
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| CN201510980862.XA CN105427924A (en) | 2015-12-23 | 2015-12-23 | Long-lifetime ready-made branch cable and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510980862.XA CN105427924A (en) | 2015-12-23 | 2015-12-23 | Long-lifetime ready-made branch cable and production method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107103951A (en) * | 2016-04-26 | 2017-08-29 | 石策略 | A kind of pre-branched cable |
| CN114446518A (en) * | 2022-02-08 | 2022-05-06 | 重庆智荟数创科技有限公司 | Multi-core branch cable and preparation method thereof |
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|---|---|---|---|---|
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Cited By (5)
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| CN107103951A (en) * | 2016-04-26 | 2017-08-29 | 石策略 | A kind of pre-branched cable |
| CN107331446A (en) * | 2016-04-26 | 2017-11-07 | 石策略 | A kind of pre-branched cable |
| CN107331447A (en) * | 2016-04-26 | 2017-11-07 | 石策略 | A kind of pre-branched cable |
| CN107342122A (en) * | 2016-04-26 | 2017-11-10 | 石策略 | A kind of pre-branched cable |
| CN114446518A (en) * | 2022-02-08 | 2022-05-06 | 重庆智荟数创科技有限公司 | Multi-core branch cable and preparation method thereof |
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Address after: Zhangqiu City, Ji''nan City, Shandong province 250220 No. ten road ten Road No. 7 high-tech park in St. Applicant after: Shandong Hualing Cable Co., Ltd. Address before: Licheng District 250220 Shandong city of Ji''nan province through No. ten road ten Road No. 7 high-tech park in St. Applicant before: Shandong Hualing Cable Co., Ltd. |
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Application publication date: 20160323 |