CN106710680A - High-cold-resistance high-elasticity power cable and preparation method thereof - Google Patents
High-cold-resistance high-elasticity power cable and preparation method thereof Download PDFInfo
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- CN106710680A CN106710680A CN201710036755.0A CN201710036755A CN106710680A CN 106710680 A CN106710680 A CN 106710680A CN 201710036755 A CN201710036755 A CN 201710036755A CN 106710680 A CN106710680 A CN 106710680A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power 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
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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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
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- 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
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a high-cold-resistance high-elasticity power cable, which comprises a conductor, an inner insulation layer and an outer sheath. The power cable also comprises an electric heating assembly and an outer insulation layer. The electric heating assembly comprises a left conductive wire, a right conductive wire, a middle conductive wire, a plurality of left alloy resistance wires and a plurality of right alloy resistance wires. The power cable is provided with the electric heating assembly, so that when the power cable is in an environment temperature of-50-0 DEG C, the whole power cable can be subjected to heating and heat preservation through electric heating of the left alloy resistance wires and the right alloy resistance wires; and external supplemented heat is provided for the power cable to heat the cable and realize temperature rise to resist cold, so that the power cable is allowed to have better low-temperature-resistance performance, can work normally and be laid normally under the environment temperature of-50-0 DEG C, and can meet market requirements. The invention also provides a preparation method of the high-cold-resistance high-elasticity power cable.
Description
Technical field
The present invention relates to electrical equipment technical field, more particularly, to a kind of cold-resistant elastomeric power cable and its system high
Preparation Method.
Background technology
Cable has power cable, control cable, compensating cable, shielded cable, high-temperature cable, computer cable, signal electricity
Cable, coaxial cable, fire-resisting cable, cable for ship, mine cable, aluminium alloy cable etc..
Power cable is the cable for transmitting and distributing electric energy, and power cable is usually used in Urban Underground power network, power station
Lead line, industrial and mining enterprises' in-line power and mistake river sea submarine transmission line.In power circuit, cable proportion just gradually increases
Plus.Power cable is the cable product for being used to transmit and distribute high-power power in the basic routing line of power system, including 1-
500KV and any of the above voltage class, the power cable of various insulation.
During power cable can be divided into by voltage class, lv power cable (35 kilovolts and less), high-tension cable (110,000
Volt and more than), extra-high-tension cable (275~800 kilovolts) and extra-high-tension cable (1000 kilovolts and more than).Additionally, can also press
Electric current is divided into ac cable and direct current cables.
Plastic insulating layer and plastic sheath being used current power cable more, when environment temperature is -50 DEG C~0 DEG C,
With the reduction of environment temperature, plastic insulating layer and plastic sheath can become more and more harder and more and more crisp, if now
Cable bend excessive velocities, angle of bend are larger or by fierce foreign impacts etc., plastic insulating layer and/or plastic sheath
Can be ruptured because brittle, therefore, needed using power cable in severe cold season and area (such as the northern area in China's winter)
Consider the resistance to low temperature of power cable.At present, the resistance to low temperature of existing power cable is not met by market to electricity
The requirement of the resistance to low temperature of power cable.
Therefore, the resistance to low temperature of power cable how is improved, it is that those skilled in the art need solution badly to meet the market demand
Technical problem certainly.
The content of the invention
It is an object of the invention to provide a kind of elastomeric power cable that resists cold high, the power cable has preferably resistance to
Cryogenic property, can under -50 DEG C~0 DEG C environment temperature normal work and normal laying, disclosure satisfy that the market demand.The present invention
Another purpose be that a kind of preparation method of the above-mentioned high elastomeric power cable that resists cold is provided.
To solve above-mentioned technical problem, the technical scheme that the present invention is provided is：
A kind of elastomeric power cable that resists cold high, including conductor, inner insulating layer and oversheath, the inner insulating layer are squeezed
The conductor is wrapped, the oversheath is arranged at the outermost of the power cable, also including electric heating assembly and external insulation layer；
If the electric heating assembly include left conductive filament, right conductive filament, middle conductive filament, some left alloy resistance wires and
The dry right alloy resistance wire of root；
The left conductive filament, right conductive filament and middle conductive filament are parallel to each other and each parallel to the length of the power cable
Direction；
Radial direction side of the length direction of the left alloy resistance wire and right alloy resistance wire parallel to the power cable
To；
Some left alloy resistance wires, and the left alloy electricity are fixedly connected with the left conductive filament and middle conductive filament
The one end for hindering silk is fixedly connected with the left conductive filament, and the other end of the left alloy resistance wire is fixed with the middle conductive filament and connected
Connect；
Some right alloy resistance wires, and the right alloy electricity are fixedly connected with the right conductive filament and middle conductive filament
The one end for hindering silk is fixedly connected with the right conductive filament, and the other end of the right alloy resistance wire is fixed with the middle conductive filament and connected
Connect；
The tie point and the left alloy resistance wire and the middle conduction of the right alloy resistance wire and the middle conductive filament
The tie point of silk interlaced arrangement on the middle conductive filament；
The left conductive filament is welded to connect to cause that the vertical bag of the electric heating assembly exists along its length with right conductive filament
On the inner insulating layer；
The external insulation layer is extruded in the periphery of the electric heating assembly.
Preferably, also including wrapped steel-tape armouring layer, it is in spaced apart striated that some are coated with the steel band
Minute surface silverskin, the length direction of every minute surface silverskin is parallel with the length direction of the steel band.
Preferably, the oversheath is the double-decker for including inwall and outer wall, and the inwall is straight sleeve structure, institute
It is groove and the annular corrugated sleeve structure of boss composition to state outer wall, and the groove of the outer wall hangs down with the radial center face of boss
Directly in the longitudinal center line of the power cable, the internal face of the groove is connected with the outside wall surface seal bond of the inwall.
Preferably, the left alloy resistance wire is cupro-nickel evanohm, and the right alloy resistance wire is cupro-nickel evanohm.
Preferably, the left conductive filament, right conductive filament and middle conductive filament are copper wire.
The application also provides the preparation method that a kind of above-mentioned height resists cold elastomeric power cable, comprises the following steps：
1) left conductive filament, right conductive filament, middle conductive filament, some left alloy resistance wires and some right resistance alloys are taken
, then along its length be arranged in parallel for left conductive filament, right conductive filament and middle conductive filament by silk, then by the left alloy electricity
The one end and the left conductive filament for hindering silk are welded, and the other end of the left alloy resistance wire is welded with the middle conductive filament, will
One end of the right alloy resistance wire and right conductive filament welding, by the other end of the right alloy resistance wire with it is described in lead
Electrical filament is welded, and the length direction of the left alloy resistance wire and right alloy resistance wire is controlled in welding process perpendicular to described
The length direction of left conductive filament, right conductive filament or middle conductive filament, and controlled in welding process the right alloy resistance wire with it is described
The tie point of middle conductive filament and the left alloy resistance wire interlock with the tie point of the middle conductive filament on the middle conductive filament
Arrangement, is obtained electric heating assembly, standby；
2) conductor is taken, inner insulating layer is then extruded on conductor；
3) by step 1) obtained in the vertical bag of electric heating assembly in step 2) in inner insulating layer on, then by the left conduction
Silk is welded to connect to cause the vertical bag of the electric heating assembly on the inner insulating layer along its length with right conductive filament；
4) in step 3) to indulge and extrude external insulation layer on the electric heating assembly after bag welding；
5) in step 4) extrude after external insulation layer on extrude oversheath, be obtained power cable.
Preferably, in step 4) and step 5) between be additionally included in step 4) extrude after external insulation layer on wrapped steel band shape
Into steel-tape armouring layer.
Preferably, the preparation method of the steel band is：Using certain amount silver ammonia complex solution and the aldehyde as reducing agent
Class solution is poured in striated arranged for interval and silver mirror reaction is carried out on the interior length and width face of steel band, and silver ion is reduced and is deposited on steel
Form a plurality of in the spaced apart minute surface silverskin of striated on the interior length and width face of band.
Preferably, the step 5) it is specially：The oversheath is the double-decker for including inwall and outer wall, the inwall
Be straight sleeve structure, the outer wall is the annular corrugated sleeve structure of groove and boss composition, the groove of the outer wall with it is convex
The radial center face of platform is each perpendicular to the longitudinal center line of the power cable, and the internal face of the groove is outer with the inwall
Wall seal bond is connected；
The inwall extrudes shaping simultaneously with outer wall.
Preferably, the inwall of the oversheath is made with outer wall using polyvinyl chloride oversheath material.
This application provides a kind of elastomeric power cable that resists cold high, including conductor, inner insulating layer and oversheath, go back
Including electric heating assembly and external insulation layer；The electric heating assembly includes left conductive filament, right conductive filament, middle conductive filament, some
The left alloy resistance wire of root and some right alloy resistance wires；The application by setting electric heating assembly in power cable, when
When power cable faces -50 DEG C~0 DEG C of environment temperature, the middle conductive filament in power cable is electrically connected with a pole of power supply, will
Left conductive filament and right conductive filament in power cable are electrically connected with another pole of power supply together, using left alloy resistance wire and right conjunction
The heating power of golden resistance wire carries out heating and thermal insulation to whole power cable；The left alloy resistance wire adds with right alloy resistance wire
Heat effect mainly includes heat transfer and heat radiation, and heat transfer and heat radiation almost respectively account for left alloy resistance wire with right alloy
The 50% of total heating power amount of resistance wire, the inner insulating layer being in close contact with electric heating assembly is heated mainly by heat transfer, with
The spaced external insulation layer of electric heating assembly and oversheath are heated mainly by heat radiation.To sum up, the invention provides one kind
The cold-resistant elastomeric power cable of height, by electric heating assembly heating power, for power cable provides extraneous additional heat, heating
Heat up resistance severe cold so that the power cable has preferable resistance to low temperature, can be normal under -50 DEG C~0 DEG C environment temperature
Work and normal laying, disclosure satisfy that the market demand.
Brief description of the drawings
Fig. 1 is the horizontal cross section structure diagram of the elastomeric power cable that resists cold high provided in an embodiment of the present invention；
Fig. 2 is longitudinal cross section structure diagram of the oversheath in Fig. 1；
Fig. 3 is the top view of the steel band in Fig. 1；
Fig. 4 is the front view of the electric heating assembly in Fig. 1：
Fig. 5 is the top view of the electric heating assembly in Fig. 4.
In figure：1 conductor, 2 inner insulating layers, 3 electric heating assemblies, 301 left conductive filaments, 302 right conductive filaments, conductive filament in 303,
304 left alloy resistance wires, 305 right alloy resistance wires, 4 external insulation layers, 5 steel-tape armourings layer, 6 oversheaths, 601 inwalls, outside 602
Wall, 603 grooves, 604 boss, 7 minute surface silverskin, 8 steel bands.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is to be understood that term " " center ", " axial direction ", " radial direction ", " longitudinal direction ", " transverse direction ",
" length ", " width ", " on ", D score, "front", "rear", "left", "right", " top ", " bottom ", " interior ", " outward ", " clockwise ", " inverse
The orientation or position relationship of the instructions such as hour hands " are, based on orientation shown in the drawings or position relationship, to be for only for ease of description originally
Invention and simplified description, must be with specific orientation, with specific square rather than instruction or the signified device of hint or element
Position construction and operation, therefore be not considered as limiting the invention.
Reference picture 1~5, Fig. 1 is the horizontal section view knot of the elastomeric power cable that resists cold high provided in an embodiment of the present invention
Structure schematic diagram；Fig. 2 is longitudinal cross section structure diagram of the oversheath in Fig. 1；Fig. 3 is the top view of the steel band in Fig. 1；Fig. 4
It is the front view of the electric heating assembly in Fig. 1：Fig. 5 is the top view of the electric heating assembly in Fig. 4.
This application provides a kind of elastomeric power cable that resists cold high, including conductor 1, inner insulating layer 2 and oversheath
6, the inner insulating layer 2 extrudes the conductor 1, and the oversheath 6 is arranged at the outermost of the power cable, also adds including electricity
Hot component 3 and external insulation layer 4；
The electric heating assembly 3 includes left conductive filament 301, right conductive filament 302, middle conductive filament 303, some left alloy electricity
Resistance silk 304 and some right alloy resistance wires 305；
The left conductive filament 301, right conductive filament 302 and middle conductive filament 303 are parallel to each other and each parallel to the electric power
The length direction of cable；
The length direction of the left alloy resistance wire 304 and right alloy resistance wire 305 is parallel to the power cable
Radial direction；
Some left alloy resistance wires 304, and institute are fixedly connected with the left conductive filament 301 and middle conductive filament 303
The one end for stating left alloy resistance wire 304 is fixedly connected with the left conductive filament 301, the other end of the left alloy resistance wire 304
It is fixedly connected with the middle conductive filament 303；
Some right alloy resistance wires 305, and institute are fixedly connected with the right conductive filament 302 and middle conductive filament 303
The one end for stating right alloy resistance wire 305 is fixedly connected with the right conductive filament 302, the other end of the right alloy resistance wire 305
It is fixedly connected with the middle conductive filament 303；
Tie point of the right alloy resistance wire 305 with the middle conductive filament 303 and the left alloy resistance wire 304 and institute
State the tie point of conductive filament 303 interlaced arrangement on the middle conductive filament 303；
The left conductive filament 301 is welded to connect to cause the electric heating assembly 3 along its length with right conductive filament 302
Vertical bag is on the inner insulating layer 2；
The external insulation layer 4 is extruded in the periphery of the electric heating assembly 3.
The application sets external insulation layer 4 primarily to for electric heating assembly 3 provides insulation protection, it is to avoid electric heating assembly
Leaked electricity after 3 energizations.
It is intended to solve technical problem be mainly improve power cable resistance to low temperature, there is provided power cable
Mainly it is applied to low temperature environment, belongs to a kind of private cable suitable for special environment, is not that one kind is applied to various rings
The universal cordage in border, therefore, the application is to the structure design of power cable inevitably to power cable except low temperature resistant
Other performance outside performance produces certain influence, or even can weaken other certain or some performances, and this belongs to industry
The normal design phenomenon of product.
This application provides a kind of elastomeric power cable that resists cold high, including conductor 1, inner insulating layer 2 and oversheath
6, also including electric heating assembly 3 and external insulation layer 4；The electric heating assembly 3 include left conductive filament 301, right conductive filament 302,
Middle conductive filament 303, some left alloy resistance wires 304 and some right alloy resistance wires 305；The application is by electric power electricity
Electric heating assembly 3 is set in cable, when power cable faces -50 DEG C~0 DEG C of environment temperature, by the middle conductive filament in power cable
303 electrically connect with a pole of power supply, and the left conductive filament 301 and right conductive filament 302 in power cable is another with power supply together
Pole is electrically connected, and whole power cable is heated with the heating power of right alloy resistance wire 305 using left alloy resistance wire 304
Insulation；The left alloy resistance wire 304 mainly includes heat transfer and heat radiation, heat with the heat effect of right alloy resistance wire 305
Conduction and heat radiation almost respectively account for the 50% of left alloy resistance wire 304 and total heating power amount of right alloy resistance wire 305,
The inner insulating layer 2 being in close contact with electric heating assembly 3 is heated mainly by heat transfer, spaced with electric heating assembly 3 outer exhausted
Edge layer 4 and oversheath 6 are heated mainly by heat radiation；The power cable first can connect electric heating assembly 3 in cable laying operation
Energization source, heat temperature raising resistance severe cold so that the plastic insulating layer and plastic sheath 6 of power cable are constructed in face of radiation
During bending, movement, heavy impact when will not embrittlement；The power cable can also be in normal use, just
Often outside transmission of electricity power supply, electric heating assembly 3 is separately connected into power supply all the way, heat temperature raising resistance severe cold so that the modeling of power cable
Material insulating barrier and plastic sheath 6 will not be crisp when bending, movement, the heavy impact during in face of normal use
Split.To sum up, it is electric power by the heating power of electric heating assembly 3 the invention provides a kind of elastomeric power cable that resists cold high
Cable provides extraneous additional heat, heat temperature raising resistance severe cold so that the power cable has preferable resistance to low temperature, energy
Normal work and normal laying under -50 DEG C~0 DEG C environment temperature, disclosure satisfy that the market demand.
The application has carried out special setting to the structure of electric heating assembly 3 so that assuming that in the length side of the power cable
Upward any point is cut off, the electric heating assembly 3 in the two-section power cable obtained after cut-out still can with heating power,
Still severe cold can be resisted with heat temperature raising, rupturing operation does not destroy the electrified regulation function of two-section power cable, so that
Obtaining can be cut off in any point on the length direction of the power cable, adapt to the cable laying operation requirement at scene, be improve
The practicality of power cable.
In one embodiment of the application, above-mentioned power cable also includes wrapped steel-tape armouring layer 5, the steel band 8
On be coated with some in the spaced apart minute surface silverskin 7 of striated, every length direction of the minute surface silverskin 7 and the steel band
8 length direction is parallel；Above-mentioned to refer to, the heat that electric heating assembly 3 is produced mainly is transmitted with heat transfer with heat radiation, and
The heat of heat radiation accounts for 50% or so of the total quantity of heat production of electric heating assembly 3, and proportion is very big, if taken no action to, has very
The heat of vast scale can be delivered in the environment outside power cable in the way of heat radiation, it is impossible to which power cable is added
Heat, hard-earned heat will be slatterned easily, therefore, the steel band 8 with minute surface silverskin 7 is provided with herein, using mirror
The mirror-reflection function of face silverskin 7 reflects back heat radiation heat, in the environment outside stop heat radiation to power cable,
The inside of power cable will be all the time stored in the heat of radiant heat transfer；Furthermore, the minute surface silverskin 7 be located at inner insulating layer 2 with
Between oversheath 6, there be external insulation layer 4 and oversheath 6 in the outside of electric heating assembly 3, above-mentioned to refer to, between electric heating assembly 3
Heated mainly by heat radiation every the external insulation layer 4 and oversheath 6 of arrangement, if the minute surface silverskin 7 on steel band 8 will be most
Heat is all reflected back, that just cannot External Insulation layer 4 and oversheath 6 effectively heated, cause in power cable
It is hot outer cold, severe cold cannot be still born, therefore, minute surface silverskin 7 is arranged to some in striated arranged for interval, phase by the application
It is the surface of steel band 8 between adjacent two minute surface silverskin 7, coating is not provided with so that heat radiation can be extended there through, so that above-mentioned
The part reflective thermal radiation of steel band 8, fractional transmission heat radiation, the area of reasonable control minute surface silverskin 7 accounts for the face in length and width face in steel band 8
Long-pending ratio so that heat both can as often as possible be stored in the inside of power cable, again can be with External Insulation layer 4 and outer shield
Set 6 carries out fully enough heating.
In one embodiment of the application, above-mentioned oversheath 6 is the double-decker for including inwall 601 and outer wall 602, institute
Inwall 601 is stated for straight sleeve structure, the outer wall 602 is the annular corrugated sleeve structure of groove 603 and the composition of boss 604,
The groove 603 of the outer wall 602 is each perpendicular to the longitudinal center line of the power cable, institute with the radial center face of boss 604
The internal face of groove 603 is stated to be connected with the outside wall surface seal bond of the inwall 601；Insulation has material to be incubated, from leading
The material of hot coefficient very little in itself, such as polystyrene or polyurethane, insulation also has structural thermal insulation, is set by object
Put insulation construction to reach heat insulating effect, such as foaming structure, so most organic insulation materials of the prior art are all
It is foaming structure, such as polystyrene molding foaming warming plate (EPS warming plates), (XPS is protected polystyrene extruded plastic foam warming plate
Warm plate), therefore oversheath 6 herein is preferably also adopted by some insulation constructions, for example foam oversheath, but foaming oversheath will
Make oversheath 6 excessively soft, lose the work(such as the due resistance ambient pressure of oversheath 6, pulling force, impulsive force, acid-fast alkali-proof, insect bite
Can, therefore, the application devises a kind of distressed structure of foaming structure, it can be understood as will be numerous in existing foaming insulation board
Small small air bubble is integrated into one and the big air bubble of only one, air is full of in the big air bubble, due to leading for air
Hot coefficient is 0.023W/ (mK), and the thermal conductivity factor of the polyethylene that cable jacket is commonly used is 0.33~0.50W/
(mK), the thermal conductivity factor of the polyvinyl chloride that cable jacket is commonly used is 0.16W/ (mK), by contrast, it is clear that air
Thermal conductivity factor will be much smaller than the thermal conductivity factor of existing polyethylene outer sheath and polyvinyl chloride oversheath, sandwich one in oversheath 6
Layer of air is certainly better than the heat insulating effect of solid polyethylene outer sheath or polyvinyl chloride oversheath, so as to stop that electricity adds
The heat that hot component 3 is produced is lost in the environment outside power cable, is blocked the low temperature in external environment and is invaded into electric power
The inside of cable, forms and resists outer holding mode in protecting, and improves the ability that power cable tolerates severe cold low temperature；Oversheath 6 is adopted
With the double-walled construction of such structure, due to the double-decker that oversheath 6 is inwall 601 and the composition of outer wall 602, and the outer wall
602 groove 603 is each perpendicular to the longitudinal center line of the power cable with the radial center face of boss 604, and outer wall 602 is ring
Shape corrugated tubes structure, rather than daily seen helical fissure shape tubular construction, greatly strengthen the ring stiffness of oversheath 6,
Though there is cavity, the mechanical strength performances such as critical external compressive resistance ability, the tension of oversheath 6 of cavity should be carried more seen than daily on the contrary
The corresponding mechanical strength performance of solid oversheath 6 is eager to excel, i.e., in the case where equal mechanical strength is reached, institute under unit volume
The material of polyethylene outer sheath 6 or the material of polyvinyl chloride oversheath 6 of consumption can be less, reduce raw materials consumption；Outer shield herein
The outer wall 602 of set 6 is annular corrugated tubular construction, rather than daily seen helical fissure shape tubular construction so that assuming that
Any point on the length direction of the power cable is cut off, and the oversheath 6 in the two-section power cable obtained after cut-out is still
It is so the complete double-decker being made up of inwall 601 and outer wall 602, outer wall 602 is still complete annular corrugated pipe knot
Structure, still with mechanical strength performances such as thermal and insulating performances and critical external compressive resistance ability higher higher, rupturing operation is not
There are the thermal and insulating performance and mechanical strength performance for reducing two-section power cable, so that in the length of the power cable
Any point on degree direction is cut off, and adapts to the cable laying operation requirement at scene, improves the practicality of power cable.To sum up,
In the present embodiment, in order that the oversheath 6 of power cable has incubation and thermal insulation function, while not reducing it as outer shell structure institute
Be designed to oversheath 6 by inwall 601 and outer wall by mechanical property, the acid-proof alkaline that ought to have etc. performance, the present embodiment
602 double-deckers for constituting, interior sandwich air layer so that power cable is provided with thermal and insulating performance higher, meet practical
It is required.
In one embodiment of the application, the left alloy resistance wire 304 is cupro-nickel evanohm, the right resistance alloys
Silk 305 is cupro-nickel evanohm.
In one embodiment of the application, the left conductive filament 301, right conductive filament 302 and middle conductive filament 303 are copper
Silk.
Resist cold the preparation method of elastomeric power cable present invention also provides a kind of above-mentioned height, including following step
Suddenly：
1) left conductive filament 301, right conductive filament 302, middle conductive filament 303, some left alloy resistance wires 304 and some are taken
The right alloy resistance wire 305 of root, then puts down left conductive filament 301, right conductive filament 302 and middle conductive filament 303 along its length
Row arrangement, then welds one end of the left alloy resistance wire 304 with the left conductive filament 301, by the left resistance alloys
The other end of silk 304 is welded with the middle conductive filament 303, by one end of the right alloy resistance wire 305 and the right conductive filament
302 welding, the other end of the right alloy resistance wire 305 are welded with the middle conductive filament 303, and institute is controlled in welding process
The length direction of left alloy resistance wire 304 and right alloy resistance wire 305 is stated perpendicular to the left conductive filament 301, right conductive filament
The length direction of 302 or middle conductive filaments 303, and the right alloy resistance wire 305 is controlled in welding process with the middle conductive filament
The tie point of 303 tie point and the left alloy resistance wire 304 and the middle conductive filament 303 is on the middle conductive filament 303
Interlaced arrangement, is obtained electric heating assembly 3, standby；
During welding electric heating assembly 3, it is preferred that the width of control electric heating assembly 3 is equal to the outer of inner insulating layer 2
The girth of circumference, after causing the vertical bag of follow-up electric heating assembly 3 on the inner insulating layer 2, can tight contact between with inner insulating layer 2,
There is no space, it is to avoid power cable is loose；
2) conductor 1 is taken, inner insulating layer 2 is then extruded on conductor 1；
3) by step 1) obtained in the vertical bag of electric heating assembly 3 in step 2) in inner insulating layer 2 on, then the left side is led
Electrical filament 301 is welded to connect to cause the vertical bag of the electric heating assembly 3 in the interior insulation along its length with right conductive filament 302
On layer 2；
4) in step 3) to indulge and extrude external insulation layer 4 on the electric heating assembly 3 after bag welding；
5) in step 4) extrude after external insulation layer 4 on extrude oversheath 6, be obtained power cable.
In one embodiment of the application, in step 4) and step 5) between be additionally included in step 4) extrude after it is outer absolutely
Wrapped steel band 8 forms steel-tape armouring layer 5 in edge layer 4.
In one embodiment of the application, the preparation method of the steel band 8 is：By certain amount silver ammonia complex solution
Being poured on the interior length and width face of steel band 8 in striated arranged for interval with the aldehydes solution as reducing agent carries out silver mirror reaction, silver
Ion is reduced on the interior length and width face for be deposited on steel band 8 and forms a plurality of in the spaced apart minute surface silverskin 7 of striated.
In one embodiment of the application, the step 5) it is specially：The oversheath 6 be include inwall 601 with it is outer
The double-decker of wall 602, the inwall 601 is straight sleeve structure, and the outer wall 602 is groove 603 and the composition of boss 604
Annular corrugated sleeve structure, the groove 603 of the outer wall 602 is each perpendicular to the electric power electricity with the radial center face of boss 604
The longitudinal center line of cable, the face of inwall 601 of the groove 603 is connected with the face seal bond of outer wall 602 of the inwall 601；
The inwall 601 extrudes shaping simultaneously with outer wall 602.
In one embodiment of the application, inwall 601 and the outer wall 602 of the oversheath 6 are used outside polyvinyl chloride
The material of sheath 6 makes.
The method and apparatus of the not detailed description of the present invention are prior art, repeat no more.
Specific embodiment used herein is set forth to principle of the invention and implementation method, above example
Illustrate that being only intended to help understands the method for the present invention and its core concept.It should be pointed out that for the common skill of the art
For art personnel, under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these change
Enter and modify to also fall into the protection domain of the claims in the present invention.
Claims (10)
1. a kind of high elastomeric power cable that resists cold, including conductor, inner insulating layer and oversheath, the inner insulating layer are extruded
The conductor, the oversheath is arranged at the outermost of the power cable, it is characterised in that also including electric heating assembly and
External insulation layer；
The electric heating assembly includes left conductive filament, right conductive filament, middle conductive filament, some left alloy resistance wires and some
Right alloy resistance wire；
The left conductive filament, right conductive filament and middle conductive filament are parallel to each other and each parallel to the length side of the power cable
To；
Radial direction of the length direction of the left alloy resistance wire and right alloy resistance wire parallel to the power cable；
Some left alloy resistance wires, and the left alloy resistance wire are fixedly connected with the left conductive filament and middle conductive filament
One end be fixedly connected with the left conductive filament, the other end of the left alloy resistance wire is fixedly connected with the middle conductive filament；
Some right alloy resistance wires, and the right alloy resistance wire are fixedly connected with the right conductive filament and middle conductive filament
One end be fixedly connected with the right conductive filament, the other end of the right alloy resistance wire is fixedly connected with the middle conductive filament；
The tie point and the left alloy resistance wire and the middle conductive filament of the right alloy resistance wire and the middle conductive filament
Tie point interlaced arrangement on the middle conductive filament；
The left conductive filament is welded to connect to cause the vertical bag of the electric heating assembly described along its length with right conductive filament
On inner insulating layer；
The external insulation layer is extruded in the periphery of the electric heating assembly.
2. power cable according to claim 1, it is characterised in that also including wrapped steel-tape armouring layer, the steel band
On be coated with some in the spaced apart minute surface silverskin of striated, every length direction of the minute surface silverskin and the steel band
Length direction is parallel.
3. power cable according to claim 2, it is characterised in that the oversheath is the bilayer for including inwall and outer wall
Structure, the inwall is straight sleeve structure, and the outer wall is the annular corrugated sleeve structure of groove and boss composition, described outer
The groove of wall and the radial center face of boss are each perpendicular to the longitudinal center line of the power cable, the internal face of the groove with
The outside wall surface seal bond connection of the inwall.
4. power cable according to claim 1, it is characterised in that the left alloy resistance wire is cupro-nickel evanohm, institute
Right alloy resistance wire is stated for cupro-nickel evanohm.
5. power cable according to claim 1, it is characterised in that the left conductive filament, right conductive filament and middle conduction
Silk is copper wire.
6. the height described in a kind of claim 1 resists cold the preparation method of elastomeric power cable, it is characterised in that including following
Step：
1) left conductive filament, right conductive filament, middle conductive filament, some left alloy resistance wires and some right alloy resistance wires are taken,
Then left conductive filament, right conductive filament and middle conductive filament are arranged in parallel along its length, then by the left resistance alloys
One end of silk is welded with the left conductive filament, the other end of the left alloy resistance wire is welded with the middle conductive filament, by institute
The one end and the right conductive filament for stating right alloy resistance wire are welded, by the other end of the right alloy resistance wire and the middle conduction
Wire bond is connect, and the length direction of the left alloy resistance wire and right alloy resistance wire is controlled in welding process perpendicular to the left side
The length direction of conductive filament, right conductive filament or middle conductive filament, and controlled in welding process the right alloy resistance wire with it is described in
The tie point of conductive filament and the left alloy resistance wire and the tie point of the middle conductive filament interlock cloth on the middle conductive filament
Put, electric heating assembly is obtained, it is standby；
2) conductor is taken, inner insulating layer is then extruded on conductor；
3) by step 1) obtained in the vertical bag of electric heating assembly in step 2) in inner insulating layer on, then by the left conductive filament with
Right conductive filament is welded to connect to cause the vertical bag of the electric heating assembly on the inner insulating layer along its length；
4) in step 3) to indulge and extrude external insulation layer on the electric heating assembly after bag welding；
5) in step 4) extrude after external insulation layer on extrude oversheath, be obtained power cable.
7. preparation method according to claim 6, it is characterised in that in step 4) and step 5) between be additionally included in step
4) wrapped steel band forms steel-tape armouring layer on the external insulation layer after extruding.
8. preparation method according to claim 7, it is characterised in that the preparation method of the steel band is：By certain amount
Silver ammonia complex solution and as reducing agent aldehydes solution in striated arranged for interval be poured on steel band interior length and width face it is enterprising
Row silver mirror reaction, silver ion is reduced on the interior length and width face for be deposited on steel band and forms a plurality of in the spaced apart mirror-like silver of striated
Film.
9. preparation method according to claim 8, it is characterised in that the step 5) it is specially：The oversheath is bag
The double-decker of inwall and outer wall is included, the inwall is straight sleeve structure, and the outer wall is the annular of groove and boss composition
Corrugated bushing structure, the groove of the outer wall is each perpendicular to the axial centre of the power cable with the radial center face of boss
Line, the internal face of the groove is connected with the outside wall surface seal bond of the inwall；
The inwall extrudes shaping simultaneously with outer wall.
10. preparation method according to claim 9, it is characterised in that the inwall of the oversheath is with outer wall using poly-
Vinyl chloride oversheath material makes.
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| CN201710036755.0A CN106710680B (en) | 2017-01-18 | 2017-01-18 | A kind of high elastomeric power cable and preparation method thereof that resists cold |
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| CN108335783A (en) * | 2018-01-29 | 2018-07-27 | 山东聚辰电缆有限公司 | One kind resistance to mud cable used for oil platform and preparation method thereof |
| CN108335784A (en) * | 2018-01-29 | 2018-07-27 | 山东聚辰电缆有限公司 | A kind of flexible mineral insulation fireproof cable and preparation method thereof |
| CN110853821A (en) * | 2019-11-29 | 2020-02-28 | 成都大唐线缆有限公司 | Coupling type new forms of energy electric automobile fills electric pile cable and double-deck crowded segmentation foaming equipment altogether |
| CN112188654A (en) * | 2020-10-14 | 2021-01-05 | 安邦电气股份有限公司 | Anti-freezing self-temperature-limiting electric tracing band for water supply pipe |
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| CN112188654A (en) * | 2020-10-14 | 2021-01-05 | 安邦电气股份有限公司 | Anti-freezing self-temperature-limiting electric tracing band for water supply pipe |
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|---|---|
| CN106710680B (en) | 2018-06-29 |
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Denomination of invention: A power cable with high cold resistance and high elasticity and its preparation method Effective date of registration: 20220708 Granted publication date: 20180629 Pledgee: Weihai commercial bank Limited by Share Ltd. Dezhou branch Pledgor: SHANDONG FOCUSTAR CABLE CO.,LTD. Registration number: Y2022980010046 |
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Date of cancellation: 20230711 Granted publication date: 20180629 Pledgee: Weihai commercial bank Limited by Share Ltd. Dezhou branch Pledgor: SHANDONG FOCUSTAR CABLE CO.,LTD. Registration number: Y2022980010046 |
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Denomination of invention: A high cold resistance and high elasticity power cable and its preparation method Effective date of registration: 20230714 Granted publication date: 20180629 Pledgee: Weihai commercial bank Limited by Share Ltd. Dezhou branch Pledgor: SHANDONG FOCUSTAR CABLE CO.,LTD. Registration number: Y2023980048478 |