CN211719330U - Ethylene propylene rubber insulated high-voltage flexible cable for salt lake - Google Patents

Abstract

The utility model discloses an ethylene propylene rubber insulated high-voltage flexible cable for salt lake, which comprises a cable core, and a wrapping layer, an isolating layer, a steel wire armor layer and an outer protective layer which are sequentially wrapped outside the cable core; the cable core is formed by twisting a plurality of shielding wire cores, and each shielding wire core comprises a conductive wire core, and a semi-conductive wrapping layer, a conductor shielding layer, an insulating shielding layer and a metal shielding layer which are sequentially wrapped outside the conductive wire core; and filling materials are filled in gaps among the shielding wire cores to form a filling layer, and optical fibers are arranged in the filling layer. Therefore, the operation condition of the cable can be monitored in real time by arranging the optical fiber, and the cable can be repaired in time when the cable breaks down, so that economic loss is avoided.

Description

Ethylene propylene rubber insulated high-voltage flexible cable for salt lake

Technical Field

The utility model relates to the technical field of cables, especially, relate to an ethylene propylene rubber insulation high voltage flexible cable for salt lake.

Background

In the related art, as a cable for transmitting electric power, if laid on the surface of a lake or above sea water, salt is easily deposited on the surface of the cable, and the thickness of the cable is gradually increased. Like this, increased the dead weight of cable to corrode the cable easily, and to cause very big influence to the heat dissipation of cable, finally lead to the cable current-carrying capacity to reduce, shortened the life of cable.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model discloses salt lake is with insulating high-pressure flexible cable of ethylene propylene rubber to solve the problem of unable real-time supervision cable among the prior art.

According to an aspect of the embodiment of the utility model, the utility model provides an ethylene propylene rubber insulated high-voltage flexible cable for salt lake, the cable includes the cable core and wraps around covering, isolation layer, steel wire armor, outer jacket around wrapping in proper order outside the cable core;

the cable core is formed by twisting a plurality of shielding wire cores, and each shielding wire core comprises a conductive wire core, and a semi-conductive wrapping layer, a conductor shielding layer, an insulating shielding layer and a metal shielding layer which are sequentially wrapped outside the conductive wire core;

and filling materials are filled in gaps among the shielding wire cores to form a filling layer, and optical fibers are arranged in the filling layer.

The utility model discloses an optional embodiment, the conductive core is for to 5 kind soft tinned wire and 6 kind soft tinned wire in at least one kind of copper line, the bunch hank and compound hank form.

The utility model discloses an optional embodiment, semiconduction adopts semiconduction around the covering around the band, just the width of semiconduction around the band is 0.12 mm.

The utility model discloses an in the optional embodiment, the conductor shielding layer with the insulation shielding layer all adopts cross-linking type polyolefin shielding material, just the thickness of conductor shielding layer is 0.9mm ~ 1.5mm, the thickness of insulation shielding layer is 1.0mm ~ 1.5 mm.

In the optional embodiment of the utility model, the insulating layer adopts the ethylene propylene rubber material, just the insulating core displacement degree less than or equal to 3% of insulating layer, the thickness of insulating layer is 5.5 mm.

In an optional embodiment of the present invention, the metal shielding layer is formed by combining a bare copper wire and an aramid fiber.

The utility model discloses an in the optional embodiment, adopt double-deck non-woven fabrics clearance to take the lid around the covering and form around the package, the lid width of taking of non-woven fabrics is 3mm ~ 5 mm.

In the optional embodiment of the utility model, the isolation layer adopts the crowded package type thermoplastic elastomer TPE material of anti high salt, just the thickness of isolation layer is 1.5mm ~ 1.8 mm.

In the optional embodiment of the utility model, the steel wire armor layer is formed for adopting the armor of galvanized steel wire, just the diameter of galvanized steel wire is 3.15 mm.

In the optional embodiment of the utility model, the outer jacket adopts fire-retardant type thermoplastic polyurethane elastomer rubber TPU material, and the thickness of outer jacket is 1.8mm ~ 3.5 mm.

According to the technical solution provided by the utility model, the embodiment of the utility model has the following advantage:

the embodiment of the utility model discloses an ethylene propylene rubber insulated high-voltage flexible cable for salt lake, which comprises a cable core, a wrapping layer, an isolating layer, a steel wire armor layer and an outer protective layer, wherein the wrapping layer, the isolating layer, the steel wire armor layer and the outer protective layer are sequentially wrapped outside the cable core; the cable core is formed by twisting a plurality of shielding wire cores, and each shielding wire core comprises a conductive wire core, and a semi-conductive wrapping layer, a conductor shielding layer, an insulating shielding layer and a metal shielding layer which are sequentially wrapped outside the conductive wire core; and filling materials are filled in gaps among the shielding wire cores to form a filling layer, and optical fibers are arranged in the filling layer. Therefore, the operation condition of the cable can be monitored in real time by arranging the optical fiber, and the cable can be repaired in time when the cable breaks down, so that economic loss is avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of an ethylene propylene rubber insulated high-voltage flexible cable for a salt lake, which is disclosed by an embodiment of the utility model;

fig. 2 is a schematic structural diagram of a shielding fiber core according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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 present invention will be described in detail with reference to the following examples.

Fig. 1 is a schematic structural view of an ethylene propylene rubber insulated high-voltage flexible cable for a salt lake, shown in fig. 1, the cable includes a cable core 11, and a wrapping layer 12, an isolation layer 13, a steel wire armor layer 14, and an outer protective layer 15, which are sequentially wrapped outside the cable core 11;

it should be understood that the cable core 11 may be constructed by stranding a plurality of shielded wire cores 111. For example, fig. 1 illustrates the cable core 11 formed by twisting 3 shielding cores 111, and the specific number of the shielding cores 111 is not particularly limited in the present invention.

As shown in fig. 2, the shielding wire core 111 may include a conductive wire core 1111, and a semi-conductive wrapping layer 1112, a conductive shielding layer 1113, an insulating layer 1114, an insulating shielding layer 1115 and a metal shielding layer 1116 sequentially wrapping the conductive wire core 1111.

Considering that if gaps exist among the shielding wire cores 111 and sufficient filler is not filled in the gaps, the cable after cabling has poor roundness; and the operation condition of the cable in the using process (such as local temperature or local vibration of the cable) cannot be timely acquired. Therefore, as shown in fig. 1, the gaps between the shield cores 111 are filled with a filler layer 16 made of a filler, and the filler layer 16 is provided with optical fibers 161. Thus, the filler can fill the gap existing between the shielding cores 111, and the optical fiber 161 can monitor the operation condition of the cable.

By way of example, the filler may be a polypropylene filling tape, a net-shaped polypropylene filling tape, a polypropylene filling rope, a rock wool rope, a glass fiber rope, or the like, and the present invention is not limited thereto.

In an alternative embodiment, the optical fiber 161 may be disposed in the filler, and the specific placement is not limited specifically. Illustratively, the optical fiber 161 may be a single mode fiber or a multimode fiber.

Alternatively, the optical fiber 161 may be composed of several optical fiber bundles, and a loose tube may be provided outside the optical fiber 161, and a gel may be filled between the optical fiber 161 and the loose tube. The ointment can prevent moisture from entering the optical fiber, lubricate the optical fiber, prevent the optical fiber from being broken and the like.

Further, the utility model discloses can also strand optic fibre 161 and communication conductor to optic fibre 161 after the transposition and communication conductor's outside parcel pine sleeve pipe.

Furthermore, the utility model discloses can also be crowded to wrap up at the pine cover outside and have the optic fibre restrictive coating.

Therefore, the optical fiber 161 can be used for monitoring the operation condition of the cable in real time, and the cable can be repaired in time when the cable breaks down, so that economic loss is avoided.

In the optional embodiment of the present invention, the cable laid around the covering 12 can be ensured to be round and tight, so as to prevent the shielding core from loosening or deforming; and the signal interference of the external environment to the cable core can be shielded; the buffer and the gasket can be realized during cable armoring, so that the cable core is prevented from being damaged by the steel wire armoring layer; and the cable core can be subjected to heat insulation, corrosion prevention or aging prevention.

It is understood that the nonwoven fabric may not melt and deform at high temperature (e.g., 230 °), and the nonwoven fabric has characteristics of good corrosion resistance, high tensile strength, low elongation, stable performance, and the like. Therefore, in the process of cabling through the non-woven fabric, the tension of the wrapping belt can be increased, and the shielding wire core is enabled to be more round and compact. The event the utility model discloses a can take the lid around the package to form for the non-woven fabrics around covering 12. In addition, consider can reach effects such as better buffering, shielding, thermal-insulated, anticorrosive or anti-aging around the certain thickness of covering 12, consequently, the utility model discloses a further can take the lid around the package for double-deck non-woven fabrics around covering 12. Of course, can also be for three-layer or three-layer above non-woven fabrics take the lid around the package to form around covering 12, the utility model discloses do not special restriction to this.

Further, it is considered that the splicing wrapping method may cause missing wrapping and wrinkles when the cable is bent, and the overlapping wrapping method may reduce the bending performance of the cable. The event the utility model provides a can adopt the clearance around the package mode around covering 12. To sum up, the utility model provides a can take the lid around the package to form for double-deck non-woven fabrics clearance around covering 12. The cover width of the nonwoven fabric may be 3mm to 5mm, and preferably, the cover width of the nonwoven fabric is 4 mm.

In the optional embodiment of the utility model, when considering that the cable is laid on the lake surface or above the sea water, the surface is easy to salt, and the thickness of the salt on the surface of the cable can be gradually increased, thereby increasing the dead weight of the cable. In order to avoid the salt problem on the cable surface, the utility model provides an isolation layer 13 can adopt anti high salt's crowded package type thermoplastic elastomer (TPE) material, and isolation layer 13's thickness is 1.5mm ~ 1.8 mm.

In an optional embodiment of the present invention, the outer sheath 15 may be made of flame retardant thermoplastic polyurethane elastomer (TPU) material, and the thickness of the outer sheath 15 may be 1.8mm to 3.5 mm. Like this for outer jacket 15 has improved fire-retardant efficiency, can also avoid the corruption of salt in sea water or the lake water to the cable, has guaranteed the normal work of cable, thereby has prolonged the life of cable. In addition, because the TPU material has oil resistance, wear resistance and water resistance, the outer sheath 15 can prevent the corrosion of oil substances, and the cable is not easily damaged when being in water, and the cable is not easily worn by foreign objects.

In an alternative embodiment of the present invention, it is considered that the salt in the seawater or lake water may be attached to the surface of the cable, thereby increasing the load-bearing capacity of the cable. So the steel wire armor layer 14 of this application forms for adopting the armor of galvanized steel wire, and the diameter of galvanized steel wire can be 3.15 mm. In this way, the steel wire armor layer 14 can withstand the increased weight of the cable due to salt deposition; and, the tensile strength of the cable can be increased through the steel wire armor layer 14, and the cable is prevented from being damaged by mechanical force during transportation and installation; and, zinc plating is the most effective anti-corrosion coating for the steel wire, so the use of zinc plated steel wire for the steel wire armor layer 14 prevents corrosion and extends the service life.

The shielded wire core 111 is explained in detail below.

In an optional embodiment of the present invention, the conductive core 1111 is formed by twisting and re-twisting at least one kind of soft tinned wire selected from the group consisting of a 5 th soft tinned wire and a 6 th soft tinned wire.

It can be understood that, since the copper wire is oxidized in the air to form the verdigris, the electrical resistance of the conductive wire core 1111 attached with the verdigris is increased due to the poor electrical conductivity of the verdigris. In order to avoid this problem, the utility model discloses in can tin-plating to the copper line, prevent the copper line oxidation to increase heat dispersion, and improved electric conductive property.

It should be understood that 5 th soft tinned wire and 6 th soft tinned wire are all than softer to mechanical mobility is stronger and bending resistance is better, makes the cable can be applied to the occasion of frequent removal, and soft tinned wire is thinner than hard tinned wire, so soft tinned wire is higher than hard tinned wire's conductivity, uses the soft tinned wire of high conductivity like this, reduces the line loss, and improves transmission of electricity efficiency.

In an alternative embodiment, the soft tinned copper wire is bundled to form a strand, and then the strand is twisted to form the conductive wire core 1111. When the compound twisting is carried out, the twisting direction of the strands can be the same, so that the friction force between the strands is reduced, and the stability of the conductive wire core 1111 is enhanced.

In an alternative embodiment of the present invention, the semi-conductive winding layer 1112 may be a semi-conductive winding tape, and the width of the semi-conductive winding tape may be 0.12 mm.

It will be appreciated that the semi-conductive tape may tighten the conductive core 1111 and prevent the conductive shield 113 from embedding into the gap of the conductive core 1111.

In the utility model discloses an optional embodiment, conductor shielding layer 1113 and insulation shielding layer 1115 all adopt cross-linked type polyolefin shielding material, and conductor shielding layer 1113's thickness can be for 0.9mm ~ 1.5mm, and insulation shielding layer 1115's thickness can be for 1.0mm ~ 1.5 mm.

It is understood that if the electric field of the cable is not uniform, the cable is easily broken down, thereby causing a reduction in the life span of the cable. The event the utility model discloses a conductor shielding layer 1113 and semiconduction make electrically conductive fibre core 1111 possess better insulating properties around covering 1112 and insulating shielding layer 1115 to reach the effect of even electric field.

Further, the conductor shielding layer 1113 may have the same potential as the conductive core 1111 and make good contact with the insulating layer 1114, so that partial discharge between the conductive core 1111 and the insulating layer 1114 is avoided, and the insulating performance of the cable is improved.

It should be understood that the cross-linked polyolefin shielding material has better mechanical properties, environmental stress cracking resistance, chemical corrosion resistance, creep resistance, high temperature resistance and the like, so the cross-linked polyolefin shielding material can be used in severe environments. The cross-linked polyolefin shielding material can be made into particles, so that the particles in the conductor shielding layer 1113 can be in close contact with the semiconductive wrapping layer 1112 and the insulating layer 1114, and the particles in the insulating shielding layer 1115 can be in close contact with the insulating layer 1114 and the metal shielding layer 1116, which is beneficial to maintaining the long-term stability of the cable.

Furthermore, the present invention can also add an auxiliary agent in the cross-linked polyolefin shielding material, such as adding carbon black to improve conductivity and prevent static electricity, and adding an antioxidant (such as phenols, amines, phosphites, etc.) to improve oxidation inhibition, and adding a light stabilizer (such as ultraviolet light absorber, hindered amine light stabilizer, etc.) to convert the energy of the absorbed light into heat energy for release.

For example, the polyolefin may be crosslinked in the following manner: the radiation crosslinking mode, the peroxide crosslinking mode or the silane crosslinking mode, and the utility model does not specially limit the radiation crosslinking mode, the peroxide crosslinking mode or the silane crosslinking mode.

In the utility model discloses an optional embodiment, insulating layer 1114 can adopt the ethylene propylene rubber material, and insulating core displacement degree less than or equal to 3% of insulating layer 1114, and the thickness of insulating layer 1114 can be 5.5 mm.

It can be understood that the ethylene propylene rubber insulation has stable electrical performance and high temperature resistance, so that the insulation layer 1114 can have good insulation performance and voltage resistance.

It should be appreciated that if the insulation eccentricity of the insulation layer 1114 is large, the cable is prone to breakdown. Therefore, the utility model provides an insulating core displacement degree less than or equal to 3% of insulating layer 1114.

In an alternative embodiment of the present invention, the metal shielding layer 1116 is formed by combining a bare copper wire and aramid fiber. Specifically, a certain amount of aramid fibers can be mixed in the bare copper wire, and then the bare copper wire mixed with the aramid fibers is sparsely wound outside the insulation shielding layer 1115.

It can be understood that the metal shielding layer 1116 can shield the electric field of itself and prevent electromagnetic interference, and ground protection can be performed, that is, the cable core 11 is damaged, and the current leaked from the cable core 11 can be connected with the grounding grid through the metal shielding layer 1116, so as to achieve the effect of safety protection.

It should be understood that the tensile strength of the aramid fiber is higher than that of the copper wire, so that the tensile strength of the cable is ensured and the cable can bear higher compressive stress by adding the aramid fiber.

In conclusion, the cable is reasonable and simple in structure, has the characteristics of safety, stability, softness, oil resistance, salt resistance, flame retardance, tensile strength and the like of electrical performance under severe environments such as salt lakes and the like, and has the characteristic of monitoring the running state of the cable, so that the cable can be timely repaired when the cable breaks down, and economic loss is avoided.

It should be noted that the terms "comprises" and "comprising," and any variations thereof, of embodiments of the present invention are 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.

The ethylene propylene rubber insulated high-voltage flexible cable for the salt lake, which is applied to the embodiment of the present invention, is explained above, and the explanation of the above embodiment is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims (10)

1. The ethylene propylene rubber insulated high-voltage flexible cable for the salt lake is characterized by comprising a cable core, and a wrapping layer, an isolation layer, a steel wire armor layer and an outer protective layer which are sequentially wrapped outside the cable core;

the cable core is formed by twisting a plurality of shielding wire cores, and each shielding wire core comprises a conductive wire core, and a semi-conductive wrapping layer, a conductor shielding layer, an insulating shielding layer and a metal shielding layer which are sequentially wrapped outside the conductive wire core;

and filling materials are filled in gaps among the shielding wire cores to form a filling layer, and optical fibers are arranged in the filling layer.

2. The ethylene propylene rubber insulated high-voltage flexible cable for the salt lake as claimed in claim 1, wherein the conductive wire core is formed by bundling and twisting at least one of a 5 th soft tinned copper wire and a 6 th soft tinned copper wire.

3. The ethylene propylene rubber insulated high-voltage flexible cable for the salt lake, according to claim 1, is characterized in that a semi-conductive wrapping tape is adopted as the semi-conductive wrapping layer, and the width of the semi-conductive wrapping tape is 0.12 mm.

4. The ethylene propylene rubber insulated high-voltage flexible cable for the salt lake, according to claim 1, is characterized in that the conductor shielding layer and the insulation shielding layer are both made of cross-linked polyolefin shielding materials, the thickness of the conductor shielding layer is 0.9 mm-1.5 mm, and the thickness of the insulation shielding layer is 1.0 mm-1.5 mm.

5. The ethylene propylene rubber insulated high-voltage flexible cable for the salt lake, according to claim 1, is characterized in that the insulating layer is made of ethylene propylene rubber, the insulation eccentricity of the insulating layer is less than or equal to 3%, and the thickness of the insulating layer is 5.5 mm.

6. The ethylene propylene rubber insulated high-voltage flexible cable for the salt lake as claimed in claim 1, wherein the metal shielding layer is formed by combining a bare copper wire and aramid fiber.

7. The ethylene propylene rubber insulated high-voltage flexible cable for the salt lake as claimed in claim 1, wherein the wrapping layer is formed by wrapping double layers of non-woven fabrics with gap lapping covers, and the lapping width of the non-woven fabrics is 3 mm-5 mm.

8. The ethylene propylene rubber insulated high-voltage flexible cable for the salt lake, according to claim 1, is characterized in that the isolation layer is made of a high-salt-resistant extruded thermoplastic elastomer (TPE) material, and the thickness of the isolation layer is 1.5 mm-1.8 mm.

9. The ethylene propylene rubber insulated high-voltage flexible cable for the salt lake as claimed in claim 1, wherein the steel wire armor layer is armored by galvanized steel wires, and the diameter of the galvanized steel wires is 3.15 mm.

10. The ethylene propylene rubber insulated high-voltage flexible cable for the salt lake according to claim 1, wherein the outer protective layer is made of flame-retardant thermoplastic polyurethane elastomer rubber (TPU) material, and the thickness of the outer protective layer is 1.8 mm-3.5 mm.

Images