CN217562290U - Shore power cable - Google Patents
Shore power cable Download PDFInfo
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- CN217562290U CN217562290U CN202221676159.1U CN202221676159U CN217562290U CN 217562290 U CN217562290 U CN 217562290U CN 202221676159 U CN202221676159 U CN 202221676159U CN 217562290 U CN217562290 U CN 217562290U
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Abstract
The utility model provides a shore power cable, which comprises a cable core, an inner protection layer, a functional unit and an outer sheath, wherein the inner protection layer is coated outside the cable core, the functional unit is arranged outside the inner protection layer, and the outer sheath is coated outside the functional unit; the cable core comprises three power wire cores and four grounding wire cores, the cross sections of the three power wire cores are circular and tangent in pairs, the four grounding wire cores are respectively arranged in a central gap formed by the three power wire cores and a gap formed by any two adjacent power wire cores and the inner protection layer, and the cross section shapes of the four grounding wire cores are respectively the same as the central gap formed by the three power wire cores and the gaps formed by any two adjacent power wire cores and the inner protection layer. The cable core of the shore power cable adopts a combined structure of a circular power wire core and a special-shaped grounding wire core, and has the characteristics of large contact area between the power wire core and the grounding wire core, stable structure and the like, so that the service life of the cable can be prolonged; the shore power cable also has a light-emitting warning function.
Description
Technical Field
The utility model relates to a shore connection cable belongs to wire and cable technical field.
Background
With the great high-speed development of economy, port construction is continuously enlarged, and the number of ships in port is also greatly increased. When a large ship is in a port, the large ship often generates electricity by a generator burning diesel oil, heavy oil and the like, so that sulfide, oxynitride and other pollutants are generated, and the shore power technology of the large ship is developed. The ship shore power system is characterized in that a generator on the ship is not used during berthing of the ship, and a power supply on the land is used for supplying power, so that the use of the ship shore power system can greatly reduce the regional environmental pollution, protect the ecological environment, reduce the power consumption cost for berthing the ship, effectively improve the power supply efficiency of a port, and is the best way for saving energy and reducing the exhaust emission of the port.
Although marine shore power systems have many advantages as shown above, the high voltage shore power cables currently used for marine shore power systems have the following drawbacks.
Firstly, the power wire core of the high-voltage shore power cable conventionally used in the field generally has no metal shielding structure, the grounding wire core is directly used as a channel of short-circuit current when the cable is in fault, the power wire core and the grounding wire core are generally in a circular structure, the grounding wire core is distributed in gaps among 3 power wire cores, the grounding wire core and the power wire core in the structure are only in contact at tangent positions, the contact resistance is large, and in addition, the shore power cable needs to be bent and moved frequently, and the grounding wire core and the power wire core can have poor contact. In addition, the increase of contact resistance can affect the capacity of the short-circuit current and the conduction of the short-circuit current, and poor contact can cause the reduction of thermal conductivity, thereby causing the cable to operate under the condition of temperature rise exceeding the normal allowable temperature rise, which can reduce the performance and shorten the service life of the cable.
Secondly, because the power core of the high-voltage shore power cable conventionally used in the field at present does not usually have a metal shielding structure, the electromagnetic field generated when the cable is electrified can generate electromagnetic interference to the outside.
In addition, the control and communication units of the shore power cable conventionally used in the field are usually distributed in gaps among 3 power wire cores, the number of control wire cores is limited (generally not more than 5 cores) under the influence of gap space, the number of control wire cores cannot meet application requirements along with the increase of the control signal requirement of the shore power system, and once the control unit fails, no more standby control wire cores are available for normal use.
Finally, the shore power cable conventionally used in the field is only used as a carrier for transmission, has no warning function, and is not easy to be found by people when being wound on the ground particularly at night, so that people or machines are likely to trip, and the shore power connection device is easy to be damaged due to tripping and dragging force.
Therefore, providing a new shore power cable has become an urgent technical problem to be solved in the art.
SUMMERY OF THE UTILITY MODEL
In order to solve the above disadvantages and shortcomings, the present invention provides a shore power cable. The utility model provides a bank electricity cable is as boats and ships bank electricity system's important component, and its main function is with conveying to boats and ships such as the electric energy in the bank, communication signal and uses to possess bank electricity system connection safety signal's monitor function.
In order to achieve the above object, the present invention provides a shore power cable, wherein the shore power cable comprises a cable core, an inner protection layer, a functional unit and an outer sheath, the inner protection layer is coated outside the cable core, the functional unit is arranged outside the inner protection layer, and the outer sheath is coated outside the functional unit;
the cable core comprises three power wire cores and four grounding wire cores, the cross sections of the power wire cores are circular and tangent in a pairwise mode, the four grounding wire cores are arranged in a central gap formed by the three power wire cores and a gap formed by any two adjacent power wire cores and the inner protective layer respectively, and the cross section shapes of the four grounding wire cores are the same as the cross section shapes of the central gap formed by the three power wire cores and the gaps formed by any two adjacent power wire cores and the inner protective layer respectively.
The utility model discloses in, the cable core includes three power sinle silks and four earth connection cores, forms a central space between the three power sinle silks jointly this moment, and two arbitrary adjacent power sinle silks in the three power sinle silks still form three space with interior sheath respectively, and four earth connection cores set up respectively in these four spaces promptly.
The utility model discloses an in some embodiments, the cross-section of the cable core that is formed by three power sinle silks and four earth core is circular, and three the cross sectional dimension of power sinle silk is completely the same, and two arbitrary adjacent power sinle silks are the same with the three space that interior sheath formed respectively, therefore set up the cross sectional shape of three earth core in these three spaces this moment completely the same.
The utility model discloses in, earth core and power core (specifically be its metal shielding layer) contact completely, have increased short-circuit current's capacity, have reduced the temperature rise of cable.
As the utility model discloses above a concrete implementation of shore connection cable, wherein, shore connection cable still includes a plurality of luminous colour bars, a plurality of luminous colour bars set up in the surface of oversheath.
As the utility model discloses above a concrete implementation of shore connection cable, wherein, luminous colour bar is two, sets up respectively in the symmetry both sides of overcoat.
The utility model discloses in, luminous colour bar can be through the commercial acquisition, also can obtain by oneself, if it can adopt the mixed material of night light look female and transparent color polyurethane elastomer to make through current conventional method as the raw materials. The luminous color master batch is a material capable of automatically emitting light in dark places, and the main component of the luminous color master batch is rare earth. The luminous color master batch has strong absorption capacity on short-wave visible light below 450nm, sunlight and ultraviolet light, and realizes a luminous function by absorbing various visible lights.
The utility model provides a bank electricity cable gives other people the warning through setting up luminous colour bar that can give out light, and the cable coils around very difficult quilt human on the ground very much and gives out light through luminous colour bar and can avoid appearing stumbling the condition of pedestrian or machine very much at night very much, can also avoid damaging the problem appearance of bank electricity connecting device because of stumbling the power of dragging moreover.
As a specific embodiment of the shore power cable described above, the power line core includes, from inside to outside, a power line core conductor and a semi-conductive nylon tape wrapping layer, a first semi-conductive rubber layer, an ethylene propylene rubber insulating layer, a second semi-conductive rubber layer and a metal shielding layer sequentially wrapped around the outer surface of the power line core conductor;
the metal shielding layer comprises a plurality of metal shielding wire cores wound outside the second semi-conductive rubber layer, and each metal shielding wire core comprises a copper wire and a third semi-conductive rubber layer coated outside the copper wire.
As a specific implementation manner of the shore power cable described above, in the present invention, the power line core conductor is a copper-clad aluminum alloy composite conductor, the copper-clad aluminum alloy composite conductor is a conventional material, an inner core of the copper-clad aluminum alloy composite conductor is made of an aluminum alloy material, a volume percentage is 85-90%, an outer layer is made of a copper material, and the volume percentage is 10-15%; the copper strip-coated aluminum alloy rod/copper-coated aluminum alloy wire can be prepared by stretching a copper strip-coated aluminum alloy rod/copper-coated aluminum alloy wire, and interatomic lattices are combined in the stretching process, and the specific preparation method comprises the following steps: the copper-clad aluminum alloy composite conductor can be prepared by gradually stretching the copper strip-clad aluminum alloy rod/copper-clad aluminum alloy wire, drawing the required monofilament diameter, annealing and softening the obtained monofilament and performing a special stranding process. The utility model discloses the density of this copper clad aluminum alloy composite conductor who uses is 1/3 of pure copper, and under the prerequisite that satisfies the electrical property, the weight ratio pure copper conductor of copper clad aluminum alloy composite conductor has alleviateed about 20%. In conclusion, the copper-clad aluminum alloy composite conductor has the characteristics of small density, high strength, high flexibility and high creep resistance, so that the core made of the copper-clad aluminum alloy composite conductor has the outstanding characteristics of light weight, high flexibility and the like compared with the core made of a conventional copper conductor, and meanwhile, the cost can be saved, and the operation convenience is improved.
The utility model discloses in, the metal shielding sinle silk makes the semiconduction rubber material extrude the cladding and make in the copper wire outside, and when this metal shielding sinle silk was used and can avoid bank cable crooked, removal effectively, the copper wire crushed the semiconduction rubber layer of second.
The utility model discloses in, the effect on metal shielding layer includes:
1. an electromagnetic field caused when the shore power cable is electrified is shielded in the power wire core so as to reduce electromagnetic interference generated to the outside, and meanwhile, the influence of the outside electromagnetic field on the inside of the shore power cable is limited;
2. and when the shore power cable is normally electrified, the metal shielding layer passes through capacitance current, and when the shore power cable is in short circuit fault, the metal shielding layer passes through short-circuit current.
In the utility model, the first semi-conductive rubber layer, the second semi-conductive rubber layer and the third semi-conductive rubber layer can be made of the same or different materials; however, the materials of the semiconductive nylon belt wrapping layer, the first semiconductive rubber layer, the ethylene propylene rubber insulating layer, the second semiconductive rubber layer and the third semiconductive rubber layer correspond to the semiconductive nylon belt wrapping layer, namely the semiconductive nylon belt, the semiconductive rubber material, the ethylene propylene rubber and the like are all conventional materials.
As the utility model discloses above a concrete implementation mode of shore connection cable, wherein, the earth core from inside to outside include earth core conductor and around the package in the fourth semi-conductive rubber layer of earth core conductor surface.
As above the utility model a concrete implementation of shore connection cable, wherein, the material of ground connection sinle silk conductor is the same with the material of power sinle silk conductor, is copper clad aluminum alloy composite conductor.
As the utility model discloses above a concrete implementation of shore connection cable, wherein, the material on fourth semiconduction rubber layer is the semiconduction rubber material, and it can be the same with the material on first semiconduction rubber layer, second semiconduction rubber layer and third semiconduction rubber layer, also can be different, but no matter whether the same, it is conventional material.
As above the utility model the shore power cable's a specific implementation way, wherein, the functional unit includes the combination of one or several kinds in control core, light unit and the enhancement core.
As the utility model discloses above a bank electricity cable's a specific implementation mode, wherein, the combination of one or several kinds in control core, light unit and the reinforcement core can be evenly or unevenly twined in the outside of interior sheath.
As the utility model discloses above a bank electricity cable's a specific implementation way, wherein, the external diameter size etc. of control core, light unit and reinforcement core can be the same, also can be different.
As above the utility model a concrete implementation of shore connection cable, wherein, work as when the functional unit includes two kinds arbitrary or three kinds in control core, light unit and the enhancement core combination, can rationally adjust every kind of functional unit's quantity and the concrete distribution position etc. between each functional unit according to on-the-spot actual operation needs. As the utility model discloses above a concrete implementation of shore connection cable, wherein, the control core from inside to outside include the control core conductor and around the package in proper order in the insulating layer and the shielding layer of control core conductor surface.
As above the utility model a concrete implementation of shore connection cable, wherein, the material of control core conductor is the same with the material of power core conductor, is copper clad aluminum alloy composite conductor.
As a specific implementation manner of the shore power cable of the present invention, wherein the insulating layer is made of an ethylene propylene rubber material, and the ethylene propylene rubber material is also a conventional material.
As the utility model discloses above a concrete implementation of shore connection cable, wherein, the shielding layer is woven by the copper wire and is formed. The shielding layer woven by the copper wires in the control wire core can effectively avoid the interference of an external electromagnetic field and ensure the stability of control signal transmission.
As the utility model discloses above a concrete implementation of shore connection cable, wherein, the light unit from inside to outside include optic fibre and in proper order around wrap in the enhancement layer and the optical fiber sheath of optic fibre surface.
As a specific embodiment of the shore power cable described above, wherein the optical fiber is a single mode optical fiber and/or a multimode optical fiber satisfying IEC60793 requirements.
As described above in the present invention, the shore power cable according to the present invention is characterized in that the reinforcing layer is made of a high-strength aramid fiber, and the high-strength aramid fiber is a conventional material.
As above the utility model a concrete implementation of shore connection cable, wherein, the material of optical fiber sheath is high temperature vulcanized silicone rubber, and this high temperature vulcanized silicone rubber is conventional material, and it can be resistant 180 ℃ high temperature, avoids with oversheath looks adhesion.
As above the utility model a concrete implementation of shore connection cable, wherein, the enhancement core includes central enhancement rope and around the package in the enhancement core sheath of central enhancement rope surface.
As the utility model discloses above a concrete implementation of shore connection cable, wherein, the center is strengthened the rope and is torn rope or other non-metallic fiber ropes such as dacron silk and polyester yarn for aramid fiber.
As above, the shore power cable according to the present invention is characterized in that the material of the reinforcing sheath is polyurethane elastomer material, and the polyurethane elastomer material is also conventional material.
As a specific embodiment of the shore power cable of the present invention, the inner sheath and the outer sheath are made of polyurethane elastomer material;
the thickness of the inner sheath is 3.0 +/-0.5 mm, and the thickness of the outer sheath is 3.0 +/-0.5 mm.
In the utility model discloses, polyurethane elastomer material also is conventional material. For example, the polyurethane elastomer material is obtained by blending the carbon black N330 and the calcined argil with the surface treatment to obtain a modified polyurethane material, and the modification process reduces the dynamic internal heat generation of the polyurethane elastomer; in the modification process, auxiliaries such as a stabilizer, an anti-aging agent and the like are also used, and the heat resistance of the polyurethane material can be improved by utilizing the stabilizer and the anti-aging agent; on the basis of keeping the high strength, the high tear resistance and the high wear resistance of the polyurethane material, the extrusion and heat resistance of the polyurethane material are greatly improved.
When the outer sheath is processed, the outer sheath, the inner protection layer and the reinforced core sheath can be fused and adhered together by utilizing extrusion high temperature so as to enhance the tensile strength of the shore power cable.
As the utility model discloses above a concrete implementation of shore connection cable, wherein, the cross-sectional shape of cable core is circular.
The utility model discloses it is right the cable core and the external diameter of shore connection cable does not do the specification, can confirm according to factors such as required different voltage levels and power core conductor sectional area among the on-the-spot actual operation process the cable core and the external diameter of shore connection cable.
Compared with the prior art, the utility model provides a beneficial technological effect that bank power cable can obtain includes:
1) The cable core of the shore power cable provided by the utility model adopts the combined structure of the circular power wire core and the special-shaped grounding wire core, and compared with the cable core of the conventional circular structure, the shore power cable has the outstanding characteristics of large contact area between the power wire core and the grounding wire core, stable structure and the like; when the shore power cable is bent or moved, the power wire core and the grounding wire core are always in good contact, the capacity of short-circuit current is increased, the temperature rise of the cable is reduced, the service life of the cable is effectively prolonged, and the problems that the contact resistance between the grounding wire core and the power wire core of the conventional high-voltage shore power cable is large, the capacity of the short-circuit current is small, and the grounding wire core is in poor contact with the power wire core and the temperature rise is large when the high-voltage shore power cable is bent or moved are solved.
2) The utility model provides a power sinle silk among shore connection cable has the metallic shield layer, the metallic shield layer includes many twines in the outer metallic shield sinle silk of second semi-conductive rubber layer, the metallic shield sinle silk includes copper wire and cladding in the outer third semi-conductive rubber layer of copper wire, namely the metallic shield layer adopts the outer sinle silk that wraps the third semi-conductive rubber layer of copper wire and sets up it outside the second semi-conductive rubber layer through the mode of winding, can effectively avoid the outer semi-conductive layer that the power sinle silk was bruised to the copper wire when the cable was crooked or removed, namely second semi-conductive rubber layer; in addition, the metal shielding layer can shield an electromagnetic field caused when the shore power cable is electrified in the power wire core so as to reduce electromagnetic interference generated to the outside and limit the influence of the outside electromagnetic field on the inside; finally, the metal shielding layer can pass through capacitance current when the shore power cable is normally electrified, and can pass through short-circuit current when short-circuit fault occurs; thereby the utility model discloses a when current conventional high-voltage shore connection cable circular telegram can be solved to this shore connection cable, the power sinle silk produces electromagnetic interference to the external world or receives external electromagnetic interference's problem.
3) The shore power cable provided by the utility model can be provided with the control wire core with more core numbers, can meet more control signal requirements of a shore power system, and can also provide the standby control wire core after the control unit breaks down, thereby solving the problem of small quantity of the control units of the conventional high-voltage shore power cable; meanwhile, the control wire core can also play a role of reinforcing the core so as to further improve the overall tensile strength of the cable.
4) The utility model provides a power sinle silk among the shore connection cable has increased the luminous color bar that has luminous alarm function, can play safety protection's effect night, and the protection personnel are not hurt and protection machine equipment is not harmed to current conventional high voltage shore connection cable does not have alarm function's defect has been solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is the utility model discloses embodiment 1 provides a shore connection cable's schematic structure.
Fig. 2 is the utility model provides a structural schematic of power core in shore power cable that embodiment 1 provided.
Fig. 3 is a schematic structural diagram of a ground core in a shore power cable provided by the utility model.
Fig. 4 is a schematic structural diagram of a control core in a shore power cable provided by the utility model embodiment 1.
Fig. 5 is a schematic structural diagram of an optical unit in a shore power cable provided by embodiment 1 of the present invention.
Fig. 6 is a schematic structural diagram of a reinforcing core in a shore power cable provided by the embodiment of the present invention.
The main reference numbers indicate:
1. a power wire core;
101. the power cable comprises a power cable core conductor 102, a semi-conductive nylon tape wrapping layer 103, a first semi-conductive rubber layer 104, an ethylene propylene rubber insulating layer 105, a second semi-conductive rubber layer 106, a copper wire 107 and a third semi-conductive rubber layer;
2. a grounding wire core;
201. a ground wire core conductor, 202, a fourth semi-conductive rubber layer;
3. a control wire core;
301. a control wire core conductor 302, an insulating layer 303 and a shielding layer;
4. a light unit;
401. optical fiber 402, reinforcing layer 403, optical fiber sheath;
5. a reinforcing core;
501. a central reinforcing cord 502, a reinforcing core sheath;
6. an inner sheath layer;
7. an outer sheath;
8. and (4) luminous color bars.
Detailed Description
It should be noted that the term "comprises/comprising" and any variations thereof in the description and claims of the present invention and the above-described drawings is intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present invention, the terms "upper", "lower", "inner", "outer", "middle", "top" and "bottom" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "disposed" and "connected" should be interpreted broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The "range" disclosed in the present invention is given in the form of a lower limit and an upper limit. There may be one or more lower limits, and one or more upper limits, respectively. The given range is defined by the selection of a lower limit and an upper limit. The selected lower and upper limits define the boundaries of the particular range. All ranges defined in this manner are combinable, i.e., any lower limit can be combined with any upper limit to form a range. For example, ranges of 60-120 and 80-110 are listed for particular parameters, with the understanding that ranges of 60-110 and 80-120 are also contemplated. Further, if the minimum range values listed are 1 and 2 and the maximum range values listed are 3,4 and 5, the following ranges are all contemplated: 1-3, 1-4, 1-5, 2-3, 2-4, and 2-5.
In the present application, unless otherwise stated, the numerical range "a-b" represents a shorthand representation of any combination of real numbers between a and b, where a and b are both real numbers. For example, the numerical range "0-5" indicates that all real numbers between "0-5" have been listed throughout the present invention, and "0-5" is only a shorthand representation of these combinations of numerical values.
In the present invention, all embodiments and preferred embodiments mentioned in the present invention can be combined with each other to form a new technical solution, if not specifically stated.
In the present invention, all the technical features mentioned in the present invention and preferred features can be combined with each other to form a new technical solution, if not specifically stated.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. The following description of the embodiments is merely illustrative of the present invention and is not intended to limit the scope of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The examples, in which specific conditions are not specified, were carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The present embodiment provides a shore power cable, the structural schematic diagram of which is shown in fig. 1, and as can be seen from fig. 1, the shore power cable includes:
the cable comprises a cable core, an inner protection layer 6, a functional unit, an outer sheath 7 and two luminous color strips 8, wherein the inner protection layer 6 is coated outside the cable core, the functional unit is arranged outside the inner protection layer 6, the outer sheath 7 is coated outside the functional unit, and the two luminous color strips 8 are respectively arranged on two symmetrical sides of the outer sheath 7; the luminous color bar 8 can be prepared by adopting a mixed material of noctilucent color master batch and transparent polyurethane elastomer as a raw material through the conventional method;
the cable core comprises three power wire cores 1 and four grounding wire cores 2, the sections of the three power wire cores 1 are circular, the section sizes are completely the same, and the three power wire cores are tangent to each other in pairs, a central gap is formed between the three power wire cores 1, any two adjacent power wire cores 1 in the three power wire cores 1 and the inner protection layer 6 form three gaps (marked as edge gaps) respectively, and the section shapes of the three edge gaps are completely the same;
one grounding wire core 2 of the four grounding wire cores 2 is positioned in a central gap, and the cross-sectional shape of the grounding wire core 2 is the same as that of the central gap, the other three grounding wire cores 2 of the four grounding wire cores 2 are completely the same and are respectively positioned in three edge gaps, and the cross-sectional shapes of the three grounding wire cores 2 are the same as that of the edge gaps, so that the three power wire cores 1 and the four grounding wire cores 2 are combined to form a circular cable core with a stable structure;
the structural schematic diagram of the power wire core 1 is shown in fig. 2, and as can be seen from fig. 2, the power wire core 1 includes, from inside to outside, a power wire core conductor 101, and a semi-conductive nylon tape wrapping layer 102, a first semi-conductive rubber layer 103, an ethylene propylene rubber insulating layer 104, a second semi-conductive rubber layer 105 and a metal shielding layer which are sequentially wrapped around the outer surface of the power wire core conductor 101;
the metal shielding layer comprises a plurality of metal shielding wire cores wound outside the second semi-conductive rubber layer 105, and each metal shielding wire core comprises a copper wire 106 and a third semi-conductive rubber layer 107 coated outside the copper wire 106;
the schematic structural diagram of the ground wire core 2 is shown in fig. 3, and as can be seen from fig. 3, the ground wire core 2 includes, from inside to outside, a ground wire core conductor 201 and a fourth semiconductive rubber layer 202 wrapped around an outer surface of the ground wire core conductor 201.
The functional unit comprises a combination of a control wire core 3, an optical unit 4 and a reinforcing core 5, wherein the control wire core 3, the optical unit 4 and the reinforcing core 5 are same in outer diameter and size and are wound on the outer side of the inner protection layer 6 in a non-uniform mode;
the structure schematic diagram of the control wire core 3 is shown in fig. 4, and as can be seen from fig. 4, the control wire core 3 includes, from inside to outside, a control wire core conductor 301, and an insulating layer 302 and a shielding layer 303 sequentially wrapped around the outer surface of the control wire core conductor 301; the insulating layer 302 is made of an ethylene propylene rubber material, the ethylene propylene rubber material is also a conventional material, and the shielding layer 303 is formed by weaving copper wires;
the structural schematic diagram of the optical unit 4 is shown in fig. 5, and as can be seen from fig. 5, the optical unit 4 includes, from inside to outside, an optical fiber 401, and a reinforcing layer 402 and an optical fiber sheath 403 sequentially wrapped around an outer surface of the optical fiber 401; the optical fiber adopts a single-mode optical fiber and/or a multi-mode optical fiber meeting IEC60793 requirements, the reinforcing layer is made of high-strength aramid fiber which is a conventional material, the optical fiber sheath is made of high-temperature vulcanized silicone rubber which is a conventional material and can resist the high temperature of 180 ℃ so as to avoid the adhesion with the outer sheath;
the structural schematic diagram of the reinforcing core 5 is shown in fig. 6, and as can be seen from fig. 6, the reinforcing core 5 includes a central reinforcing cord 501 and a reinforcing core sheath 502 wrapped around an outer surface of the central reinforcing cord 501; the central reinforcing rope 501 is an aramid fiber tearing rope, the reinforcing core sheath 502 is made of a polyurethane elastomer material, and the polyurethane elastomer material is a conventional material.
In this embodiment, the power wire core conductor 101, the ground wire core conductor 201, and the control wire core conductor 301 are all copper-clad aluminum alloy composite conductors, the copper-clad aluminum alloy composite conductors are conventional materials, the inner core of the copper-clad aluminum alloy composite conductors is made of aluminum alloy, the volume percentage of the inner core is 85-90%, the outer layer is made of copper, and the volume percentage of the outer layer is 10-15%.
In this embodiment, the inner sheath layer 6 and the outer sheath layer 7 are both made of polyurethane elastomer material, and the polyurethane elastomer material is conventional material;
the thickness of interior sheath is 3.0mm, and the thickness of oversheath is 3.0mm.
In order to more clearly describe the shore power cable provided in the present embodiment, the following detailed description is provided for the manufacturing method thereof.
The method for manufacturing the shore power cable provided by the embodiment comprises the following specific steps:
step one, wire drawing and annealing:
drawing the copper-clad aluminum alloy wire by a diamond high-precision drawing die with gradually-changed aperture in a drawing machine to obtain a monofilament with the diameter phi of 0.080-0.400 mm; specifically, a drawing die with gradually changed apertures in a multi-head drawing machine can be adopted to produce monofilaments with required diameters, and 16 monofilaments can be simultaneously drawn at one time; and then, annealing and softening the obtained monofilament at high temperature in an oven at the temperature of 500-600 ℃, then cooling the monofilament by natural cold water by adopting a water pipe with the length of 2-3m, blowing and drying the monofilament, and winding the monofilament on a wire coil.
Step two, bunching:
respectively bunching the copper-clad aluminum alloy monofilaments drawn in the step one into cross-sectional areas of 0.5-16mm 2 And a cross-sectional area of 1.5-4mm 2 The control conductor core can specifically adopt a high-speed double-twist stranding machine, monofilaments are stranded into bundles through rotation of a stranding bow, the ratio of the stranding pitch diameter is 8-10 times, the stranding direction is the left direction, meanwhile, an active pay-off rack is used for paying off, constant tension control is performed, and the tension is set to be 10-15N so as to ensure good conductor resistance.
Step three, compound twisting and wrapping;
respectively twisting the stranded conductor units in the second step into a plurality of strands with the cross-sectional area of 25-300mm 2 The power wire core conductor and the grounding wire core conductor can be subjected to complex twisting by adopting a stepless speed change hysteresis tension controlled cage twisting machine. The cage stranding machine has a complete untwisting function, so that internal stress of a stranded conductor is small. The tensioner on the pay-off reel of the cage winch is controlled in a hysteresis control mode, and the hysteresis tension has a constant tension control function, so that the roundness of the conductor is guaranteed. In the process of complex twisting, the bundle twisting unit is arranged according to a regular twisting structure of 1+6+12+18, the twisting pitch diameter ratio is 10-12 times, the twisting direction is consistent with that of the bundle twisting unit, the complex twisting structure is more compact, and the cross section of the bundle twisting unit is 20N/mm 2 Set up tension, through the sticising mould of high glomerocryst material, strand out circular conductor, use the semi-conductive nylon area that semi-cut formula double plate simultaneously is 0.12mm with thickness closely to wind on power core conductor surface to form semi-conductive nylon area around the covering, on coiling to the drum through the traction wheel again.
Step four, manufacturing a power wire core insulating layer:
and extruding and melting the ethylene propylene rubber material, the semiconductive rubber materials corresponding to the first semiconductive rubber layer and the second semiconductive rubber layer, and then sizing the materials by an extrusion die and uniformly coating the materials outside the semiconductive nylon belt wrapping layer. Specifically, a 60+100+150 extruder three-layer co-extrusion continuous vulcanization production line can be adopted to obtain a first semi-conductive rubber layer, an ethylene-propylene rubber insulating layer and a second semi-conductive rubber layer, wherein the 60 extruder extrudes the first semi-conductive rubber layer, the thickness of the first semi-conductive rubber layer is 0.7-0.8mm, the 150 extruder extrudes the ethylene-propylene rubber insulating layer, the thicknesses of the ethylene-propylene rubber insulating layers are different for cables with different voltage grades and can be determined according to the voltage grades of the cables, for example, for 6/10kV shore power cables and 8.7/15kV shore power cables, the thicknesses of the ethylene-propylene rubber insulating layers can be 3.4mm and 4.5mm, the 100 extruder extrudes the second semi-conductive rubber layer, the thicknesses of the second semi-conductive rubber layer are 0.7-0.8mm, the 60 extruder, the 100 extruder and the 150 extruder extrude simultaneously, corresponding materials of each layer are gathered into a cavity, and are uniformly coated outside the semi-conductive nylon tape wrapping layer after being shaped by a mold. The shaped wire core directly enters a steam pipeline to carry out vulcanization crosslinking on the ethylene propylene rubber insulating layer, the first semi-conductive rubber layer and the second semi-conductive rubber layer so as to convert molecules of the ethylene propylene rubber and the semi-conductive rubber material from a linear structure into a net structure, thereby improving the temperature resistance of the ethylene propylene rubber and the semi-conductive rubber material to 90 ℃ and simultaneously improving the environmental cracking resistance of the ethylene propylene rubber and the semi-conductive rubber material. In the extrusion process, instruments such as a high-precision deviation measuring instrument, a concave-convex instrument and the like can be used for monitoring the extrusion thickness, the outer diameter and the surface quality. In addition, in the step, the extrusion temperature of a 60 extruder, a 100 extruder and a 150 extruder is 60-90 ℃, and the pressure of a steam pipeline used in the vulcanization crosslinking process is 1.0-1.5MPa.
Step five, manufacturing the metal shielding wire core:
and extruding and melting the semiconductive rubber material corresponding to the third semiconductive rubber layer, shaping by an extrusion die, and uniformly coating the semiconductive rubber material outside the conductor to obtain the metal shielding wire core. Specifically, a 45-extruder continuous vulcanization production line can be adopted to manufacture the metal shielding layer, the semi-conductive rubber material is gathered into a cavity, and the semi-conductive rubber material is uniformly coated outside the conductor after being shaped by a mold. The shaped wire core directly enters a steam pipeline to carry out vulcanization crosslinking on the third semi-conductive rubber layer so as to convert molecules of the semi-conductive rubber material from a linear structure to a net structure, thereby improving the temperature resistance of the semi-conductive rubber material to 90 ℃ and simultaneously improving the environmental cracking resistance of the semi-conductive rubber material. In the extrusion process, instruments such as a high-precision deviation measuring instrument, a concave-convex instrument and the like can be used for monitoring the extrusion thickness, the outer diameter and the surface quality. Wherein the conductor is a copper wire with the diameter of 0.5mm, the thickness of the third semi-conductive rubber layer is 0.5mm, the extrusion temperature of a 45 extruder is 60-75 ℃, and the pressure of a steam pipeline is 0.8-1.0MPa.
Step six, the metal shielding wire core is sparsely wound to form a metal shielding layer:
and uniformly winding the metal shielding wire core extruded in the step six outside the second semi-conductive rubber layer of the power wire core. Specifically, a 128-coil copper wire unwinding machine can be adopted, the metal shielding wire core is wound outside the second semi-conductive rubber layer of the power wire core through equipment rotation, the twisting pitch-diameter ratio is 4-6 times, and the twisting direction is in the left direction.
Step seven, manufacturing a grounding wire core:
and extruding and melting the semiconductive rubber material corresponding to the fourth semiconductive rubber layer, shaping by an extrusion die, and uniformly coating the semiconductive rubber material outside the ground wire core conductor. Specifically, the sectional shape and size of the grounding wire core are drawn by using AutoCAD, and accordingly, an extrusion die with the same shape is designed. And then, a 90-extruder continuous vulcanization production line is adopted to manufacture the grounding wire core, the semi-conductive rubber material is gathered into a cavity in the manufacturing process, and the semi-conductive rubber material is shaped by a mold and then uniformly coated outside the conductor of the grounding wire core. The shaped ground wire core directly enters a steam pipeline to carry out vulcanization crosslinking on the fourth semi-conductive rubber layer so as to convert molecules of the semi-conductive rubber material from a linear structure to a net structure, thereby improving the temperature resistance of the semi-conductive rubber material to 90 ℃ and simultaneously improving the environmental cracking resistance of the semi-conductive rubber material. In the extrusion process, the extrusion thickness, the outer diameter and the surface quality can be monitored by a high-precision deviation measuring instrument, a concave-convex instrument and other instruments.
Step seven: the extrusion temperature of the 90 extruder is 50-80 ℃, and the pressure of the steam pipeline is 1.0-1.5MPa.
Step eight, manufacturing a control wire core insulating layer:
and after being extruded and melted, the ethylene propylene rubber is shaped by an extrusion die and then uniformly coated outside the control wire core conductor. Specifically, a 65-extruder continuous vulcanization production line can be adopted to manufacture the insulating layer, ethylene propylene rubber is gathered into a cavity, and the cavity is shaped by a mold and then uniformly coated outside the control wire core conductor. The shaped control wire core directly enters a steam pipeline to carry out vulcanization crosslinking on the insulating layer so as to convert molecules of the ethylene propylene rubber into a net structure from a linear structure, thereby improving the temperature resistance of the ethylene propylene rubber to 90 ℃ and simultaneously improving the environmental cracking resistance of the ethylene propylene rubber. In the extrusion process, the extrusion thickness, the outer diameter and the surface quality can be monitored by a high-precision deviation measuring instrument, a concave-convex instrument and other instruments.
In the eighth step: the thickness of the insulating layer is 1.0mm, the extrusion temperature of a 65-degree extruder is 60-75 ℃, and the pressure of a steam pipeline is 1.0-1.3MPa.
Ninth, manufacturing a control wire core shielding layer:
and weaving and coating the copper wire outside the control wire core insulating layer in a crossed manner, specifically adopting a 16-spindle high-speed weaving machine, and weaving and coating the copper wire outside the control wire core insulating layer by rotating an upper turntable, a lower turntable and a turntable swing arm to be crossed, wherein the diameter of the copper wire is 0.11mm, and the weaving coverage density is 85-90%.
Step ten, manufacturing an optical unit:
the method comprises the steps of placing an optical fiber in the center, placing a high-strength aramid fiber on the outer layer, merging the optical fiber and the high-strength aramid fiber into an extruder die, extruding and melting a silicon rubber material by adopting a rubber extrusion continuous vulcanization production line, shaping by an extrusion die, and then uniformly coating the optical fiber and the aramid fiber. Specifically, a 65-extruder continuous vulcanization production line is adopted, silicon rubber is gathered into a cavity, and is uniformly coated outside the optical fiber and the aramid fiber after being shaped by a mold. The shaped optical unit directly enters a steam pipeline to carry out vulcanization crosslinking on the silicone rubber sheath so as to convert molecules of the sheath material from a linear structure to a net structure, thereby improving the temperature resistance of the sheath material to 180 ℃ and simultaneously improving the environmental cracking resistance of the sheath material. In the extrusion process, the extrusion thickness, the outer diameter and the surface quality can be monitored by a high-precision deviation measuring instrument, a concave-convex instrument and other instruments.
Step ten: the thickness of the silicon rubber sheath, namely the optical fiber sheath, is 1.0mm, the extrusion temperature of a 65 extruder is 20-25 ℃, and the pressure of a steam pipeline is 1.4-1.8MPa.
Eleven, manufacturing a reinforced core:
and extruding and melting the polyurethane elastomer material by using a 65 extruding machine, shaping by using an extruding die, and uniformly coating the aramid fiber tear rope. In the extrusion process, the extrusion thickness, the outer diameter and the surface quality can be monitored by a high-precision deviation measuring instrument, a concave-convex instrument and other instruments.
In the eleventh step: the thickness of the polyurethane elastomer sheath, i.e., the reinforcing core sheath, was 1.0mm, and the extrusion temperature of the 65 extruder was 140 to 180 ℃.
Step twelve, twisting the power wire core and the grounding wire core:
the three power wire cores are tangentially placed together two by two, the four grounding wire cores are respectively filled into the central gap and the edge gap, and the power wire cores and the grounding wire cores are combined into a circle through the doubling die. Specifically, a disc stranding machine is adopted for cabling, the pitch-diameter ratio is 8-10 times, and the stranding is leftward, so that the conductors in the power wire core and the grounding wire core cannot be loosened.
Thirteen, extruding the inner protective layer:
and extruding and melting the polyurethane elastomer material by using a 120 extruding machine, shaping by using an extruding die, and uniformly coating the outside of the cable core obtained in the step twelve. In the extrusion process, the thickness, the outer diameter and the surface quality of the sheath can be monitored by a high-precision deviation measuring instrument, a concave-convex instrument and other instruments.
Step thirteen is that: the thickness of the polyurethane elastomer sheath, i.e. the inner sheath, was 3.0mm and the extrusion temperature of the 65 extruder was 140-180 ℃.
Fourteen steps of outer layer cabling:
the control wire core, the optical unit and the reinforcing core are distributed outside the inner protective layer at intervals, wherein the number of the control wire core, the optical unit and the reinforcing core can be adjusted according to actual needs. Specifically, a 36-disc cage stranding machine can be adopted for cabling, and the cage stranding machine has a complete back-twisting function, so that the internal stress of the stranded cable core is small. Tensioner on the cage winch drawing drum is controlled with hysteresis control mode, and hysteresis tension possesses constant tension control function to guarantee that control sinle silk and optical unit are not stretched, make the conductor resistance of control sinle silk and the transmission attenuation of optical unit satisfy the requirement.
In the fourteenth step: the pitch-diameter ratio in the cabling process is 8-10 times, and the twisting direction is the right direction.
Step fifteen: extruding the outer sheath and the luminous color bar:
the outer sheath is manufactured by adopting a 90+120 double-layer co-extrusion extruding machine, wherein the main extruding machine is used for manufacturing the outer sheath, and the auxiliary extruding machine is used for manufacturing the luminous color bar. The method specifically comprises the following steps: the luminescent color master and the clear color polyurethane elastomer material were mixed with stirring in a mass ratio of 1. The inner layer shunt and the outer layer shunt are designed on the machine head of the plastic extruding machine, the outer layer shunt is designed into a double-stripe structure, the inner layer shunt is connected with the 120 plastic extruding machine, and the outer layer shunt is connected with the 90 plastic extruding machine. And the 90 plastic extruding machine and the 120 plastic extruding machine respectively extrude and melt the polyurethane elastomer material, and finally the polyurethane elastomer material passes through respective flow dividers, is shaped by an extrusion die, so that the outer sheath is uniformly coated on the outer surface of the functional unit, and the two luminous color strips are respectively arranged at two symmetrical sides of the outer sheath.
In the extrusion process, the thickness, the outer diameter and the surface quality of the sheath can be monitored by a high-precision deviation measuring instrument, a concave-convex instrument and other instruments. And (4) carrying out code spraying and printing on line while extruding the sheath, and carrying out spray printing on information such as the name, the model specification, the rice mark and the like to obtain the shore power cable.
In the fifteenth step: the thickness of the polyurethane elastomer sheath is 3.0mm, and the extrusion temperature of an extruder of 90+120 ℃ is 140-180 ℃.
To sum up, the embodiment of the utility model provides a beneficial technological effect that shore power cable can obtain includes:
1) The embodiment of the utility model provides a cable core of shore connection cable adopts the integrated configuration of circular power sinle silk and dysmorphism earth core, compares in the cable core of conventional circular structure, and it has power sinle silk and earth core area of contact big, outstanding characteristics such as stable in structure; when the shore power cable is bent or moved, the power wire core and the grounding wire core are always in good contact, the capacity of short-circuit current is increased, the temperature rise of the cable is reduced, the service life of the cable is effectively prolonged, and the problems that the contact resistance between the grounding wire core and the power wire core of the conventional high-voltage shore power cable is large, the capacity of the short-circuit current is small, and the grounding wire core is in poor contact with the power wire core and the temperature rise is large when the high-voltage shore power cable is bent or moved are solved.
2) The embodiment of the utility model provides a power sinle silk in shore power cable has the metallic shield layer, the metallic shield layer includes many twines in the outer metallic shield sinle silk of second semiconduction rubber layer, the metallic shield sinle silk includes copper wire and cladding in the outer third semiconduction rubber layer of copper wire, namely the metallic shield layer adopts the outer sinle silk that coats the third semiconduction rubber layer of copper wire and sets up it outside the second semiconduction rubber layer through the mode of winding, can effectively avoid the copper wire to crush the outer semiconduction layer of power sinle silk when the cable is crooked or remove, namely the second semiconduction rubber layer; in addition, the metal shielding layer can shield an electromagnetic field caused when the shore power cable is electrified in the power wire core so as to reduce electromagnetic interference generated to the outside and limit the influence of the outside electromagnetic field on the inside; finally, the metal shielding layer can pass through capacitance current when the shore power cable is normally electrified, and can pass through short-circuit current when short-circuit fault occurs; thereby the embodiment of the utility model provides a when this bank electricity cable can solve current conventional high pressure bank electricity cable circular telegram, the power sinle silk produces electromagnetic interference to the external world or receives external electromagnetic interference's problem.
3) The shore power cable provided by the embodiment of the utility model can be provided with the control wire core with more core numbers, can meet more control signal requirements of a shore power system, and can also provide the standby control wire core after the control unit breaks down, thereby solving the problem of small quantity of the control units of the conventional high-voltage shore power cable; meanwhile, the control wire core can also play a role of reinforcing the core so as to further improve the overall tensile strength of the cable.
4) The embodiment of the utility model provides a power sinle silk in the shore connection cable has increased the luminous color bar that has luminous alarm function, can play safety protection's effect night, and the protection personnel are not harmd and protection machine equipment is not harmed to current conventional high pressure shore connection cable does not have alarm function's defect has been solved.
The above description is only for the specific embodiments of the present invention, and the scope of the present invention can not be limited by the embodiments, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should still belong to the scope covered by the present patent.
Claims (10)
1. A shore power cable is characterized by comprising a cable core, an inner protection layer, a functional unit and an outer sheath, wherein the inner protection layer is coated outside the cable core, the functional unit is arranged outside the inner protection layer, and the outer sheath is coated outside the functional unit;
the cable core comprises three power wire cores and four grounding wire cores, the cross sections of the power wire cores are circular and tangent in a pairwise mode, the four grounding wire cores are arranged in a central gap formed by the three power wire cores and a gap formed by any two adjacent power wire cores and the inner protective layer respectively, and the cross section shapes of the four grounding wire cores are the same as the cross section shapes of the central gap formed by the three power wire cores and the gaps formed by any two adjacent power wire cores and the inner protective layer respectively.
2. The shore power cable of claim 1 further comprising a plurality of light-emitting color bars disposed on an outer surface of said outer jacket.
3. The shore power cable of claim 1 or 2, wherein the power core comprises, from inside to outside, a power core conductor, and a semiconductive nylon tape wrapping layer, a first semiconductive rubber layer, an ethylene propylene rubber insulating layer, a second semiconductive rubber layer and a metal shielding layer which are sequentially wrapped around the outer surface of the power core conductor;
the metal shielding layer comprises a plurality of metal shielding wire cores wound outside the second semi-conductive rubber layer, and each metal shielding wire core comprises a copper wire and a third semi-conductive rubber layer coated outside the copper wire.
4. A shore power cable according to claim 1 or 2, wherein said earth core comprises, from the inside outwards, an earth core conductor and a fourth semi-conductive rubber layer wrapped around the outer surface of said earth core conductor.
5. The shore power cable according to claim 1 or 2, wherein said functional units comprise one or a combination of several of a control core, a light unit and a reinforcing core.
6. The shore power cable of claim 5, wherein said control conductor comprises, from the inside to the outside, a control conductor core and, in turn, an insulating layer and a shielding layer wrapped around the outer surface of said control conductor core.
7. The shore power cable of claim 5, wherein said light unit comprises, from the inside to the outside, an optical fiber and, in turn, a reinforcing layer and a fiber jacket wrapped around the outer surface of said optical fiber.
8. The shore power cable of claim 5, wherein said strength core comprises a central strength cord and a strength core sheath wrapped around an outer surface of said central strength cord.
9. A shore power cable according to claim 1 or 2, wherein the inner and outer sheaths are both of polyurethane elastomer material;
the thickness of the inner sheath layer is 3.0 +/-0.5 mm, and the thickness of the outer sheath layer is 3.0 +/-0.5 mm.
10. A shore power cable according to claim 1 or 2, wherein the cross-sectional shape of said cable core is circular.
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| CN202221676159.1U CN217562290U (en) | 2022-07-01 | 2022-07-01 | Shore power cable |
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| CN202221676159.1U CN217562290U (en) | 2022-07-01 | 2022-07-01 | Shore power cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115602390A (en) * | 2022-12-06 | 2023-01-13 | 建业电缆集团有限公司（Cn） | Photoelectric composite cable special for coal mining machine and production process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115602390A (en) * | 2022-12-06 | 2023-01-13 | 建业电缆集团有限公司（Cn） | Photoelectric composite cable special for coal mining machine and production process |
| CN115602390B (en) * | 2022-12-06 | 2023-03-10 | 建业电缆集团有限公司 | Photoelectric composite cable special for coal mining machine and production process |
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