A copper core polyvinyl chloride insulated wire and cable

Abstract

The utility model relates to the technical field of insulated wires and cables, and specifically to a copper core polyvinyl chloride insulated wire and cable. The technical scheme is as follows: comprising a copper core and an inner sheath, wherein the outer wall of the copper core is provided with an insulating sheath, the inner wall of the inner sheath is wrapped with a plurality of copper cores and the insulating sheath, the outer wall of the inner sheath is provided with an insulating armor, and the outer wall of the insulating armor is also wrapped with a floating jacket. The beneficial effects of the utility model are as follows: when a submarine cable construction ship drops a cable onto the sea surface, the floating jacket wrapped on the surface of the cable allows the cable to float on the sea surface for a short time, after a traction device fixes one end of the cable on the shore, the floating jacket gradually dissolves in the seawater, and the cable sinks to the seabed due to its own gravity, so as to achieve the effect of enabling the cable to float on the water surface by itself, avoiding damage to the cable by being pulled by a buoy, and without removing the buoy, thereby greatly improving the laying efficiency of the submarine copper core polyvinyl chloride insulated wire and cable.

Description

Technical Field

[0001] The utility model relates to the technical field of insulated wires and cables, in particular to a copper core polyvinyl chloride insulated wire and cable. Background Art

[0002] Copper core polyvinyl chloride (PVC) insulated wire and cable is a common power transmission and distribution cable, in which the conductor is made of copper core and the insulation layer is made of polyvinyl chloride (PVC) material. Copper core polyvinyl chloride (PVC) insulated wire and cable can be used in the field of submarine cables. During the laying of submarine cables, when the submarine cable construction ship sails a certain distance from the coastline, it will start to drop cables into the water surface, and set a buoy on the surface of the cable at intervals to make the cable dropped into the sea float on the water surface. After the traction device fixes one end of the cable to the shore, the buoy is removed to let the cable sink to the seabed by its own gravity. Then the burying plow at the stern of the construction ship can bury the cable in the seabed as the construction ship moves forward.

[0003] The prior art has the following deficiencies: during the laying process of the traditional copper core polyvinyl chloride insulated wire and cable on the seabed, the traditional copper core polyvinyl chloride insulated wire and cable floats on the sea surface through buoys. The buoyancy of the buoys and the gravity of the cable pull the cable against each other, which may cause certain damage to the cable. After one end of the cable is fixed on the shore, the staff needs to drive a small boat to remove the buoys one by one. The removal of the buoys is time-consuming and very troublesome. In addition, since the buoys on the surface of the copper core polyvinyl chloride insulated wire and cable cannot be removed at the same time, the cable after the buoys are removed will sink to the seabed first. As the cable sinks to the seabed becomes longer and longer, the floating buoys become fewer and fewer. The heavy cable may pull some buoys that have not been removed into the water, which increases the difficulty of removing the buoys and greatly reduces the laying efficiency of the copper core polyvinyl chloride insulated wire and cable on the seabed.

[0004] Therefore, it is necessary to invent a copper core polyvinyl chloride insulated wire and cable. Utility Model Content

[0005] To this end, the utility model provides a copper core polyvinyl chloride insulated wire and cable. When a submarine cable construction ship drops the cable onto the sea surface, the floating jacket wrapped on the surface of the cable allows the cable to float on the sea surface for a short time. After a traction device fixes one end of the cable on the shore, the floating jacket gradually dissolves in the sea water, and the cable sinks to the seabed due to its own gravity, so as to solve the problem that traditional copper core polyvinyl chloride insulated wire and cable float on the sea surface through buoys, and the buoyancy of the buoys and the gravity of the cables pull the cables against each other, which may cause certain damage to the cables, and that it takes a long time to remove the buoys one by one. In the process of removal, the cables that sink to the seabed become longer and longer, and the floating buoys become fewer and fewer. The heavy cables will pull some buoys that have not been removed into the water, which increases the difficulty of removing the buoys and greatly reduces the laying efficiency of submarine copper core polyvinyl chloride insulated wire and cable.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a copper core polyvinyl chloride insulated wire and cable, comprising a copper core and an inner sheath, the outer wall of the copper core is provided with an insulating sheath, the inner wall of the inner sheath is wrapped with a plurality of copper cores and the insulating sheath, a filling layer is provided between the outer wall of the insulating sheath and the inner wall of the inner sheath, the outer wall of the inner sheath is provided with insulating armor, the insulating armor has water pressure resistance, seawater corrosion resistance and insulation performance, the outer wall of the insulating armor is also wrapped with a floating jacket, the floating jacket can make the inner cable float on the sea surface for a short time, and the floating jacket can gradually dissolve in the seawater.

[0007] Preferably, the insulating armor includes an insulating layer and a waterproof layer. The insulating layer is made of polyvinyl chloride and is wrapped around the outer wall of the inner sheath by heating and extrusion. The waterproof layer is made of polyethylene and is wrapped around the outer wall of the insulating layer by heating and extrusion.

[0008] Preferably, the insulating armor includes a first steel strand layer and a second steel strand layer, the first steel strand layer and the second steel strand layer are woven using hot-dip galvanized steel wires, the second steel strand layer is fixedly bonded to the outer wall of the waterproof layer, a stranded wire interlayer is bonded to the outer wall of the second steel strand layer, and the first steel strand layer is fixedly bonded to the outer wall of the stranded wire interlayer.

[0009] Preferably, the insulating armor includes an asphalt layer, which is wrapped around an outer wall of a steel strand layer by heating and extrusion. The outer wall of the asphalt layer is provided with an outer sheath, which is made of cross-linked polyethylene and is wrapped around the outer wall of the asphalt layer by heating and extrusion.

[0010] Preferably, the floating jacket comprises a buoyancy layer, the buoyancy layer is made of polyvinyl alcohol, the buoyancy layer is wrapped around the outer wall of the outer jacket by heating and extruding, a plurality of pores are arranged in the buoyancy layer, and the buoyancy layer can be dissolved by seawater.

[0011] Preferably, the floating jacket comprises a jacket membrane, the jacket membrane is made of a polylactic acid-based film material, and the jacket membrane is wrapped around the surface of the buoyancy layer.

[0012] Preferably, the inner sheath is made of rubber material, and the inner sheath is wrapped around the outer wall of the filling layer by heating and extruding, and the insulating sheath is made of cross-linked polyethylene material, and the insulating sheath is wrapped around the outer wall of the copper core by heating and extruding.

[0013] Preferably, the filling layer is filled with polyester resin material, and the filling layer is filled between the outer wall of the insulating sheath and the inner wall of the inner sheath by means of heating injection molding.

[0014] The beneficial effect of the utility model is that when the submarine cable construction ship drops the cable onto the sea surface, the floating jacket wrapped on the cable surface allows the cable to float on the sea surface for a short time. After the traction device fixes one end of the cable on the shore, the floating jacket gradually dissolves in the seawater, and the cable sinks to the seabed due to its own gravity, so as to achieve the effect of enabling the cable to float on the water surface by itself, avoiding the cable being damaged by the pulling of the buoy, and there is no need to remove the buoy, thereby greatly improving the laying efficiency of the submarine copper core polyvinyl chloride insulated wire and cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A front view of a copper core polyvinyl chloride insulated wire and cable provided by the utility model;

[0016] Figure 2 A cross-sectional view of a floating jacket of a copper core polyvinyl chloride insulated wire and cable provided by the utility model;

[0017] Figure 3 A cross-sectional view of a copper core polyvinyl chloride insulated wire and cable provided by the utility model;

[0018] Figure 4 The utility model provides an exploded view of a copper core polyvinyl chloride insulated wire and cable.

[0019] In the figure: outer jacket 11, buoyancy layer 12, pores 13, outer sheath 14, asphalt layer 15, steel strand layer 16, strand interlayer 17, steel strand layer 2 18, waterproof layer 19, insulating layer 20, inner sheath 21, filling layer 22, insulating sheath 23, copper core 24. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0021] Example 1

[0022] like Figure 1-Figure 4 As shown, a copper core polyvinyl chloride insulated wire and cable in the embodiment of the first aspect of the utility model comprises a copper core 24 and an inner sheath 21, the outer wall of the copper core 24 is provided with an insulating sheath 23, the inner wall of the inner sheath 21 is wrapped with a plurality of copper cores 24 and insulating sheaths 23, a filling layer 22 is provided between the outer wall of the insulating sheath 23 and the inner wall of the inner sheath 21, the outer wall of the inner sheath 21 is provided with an insulating armor, the insulating armor has water pressure resistance, seawater corrosion resistance and insulation performance, and the outer wall of the insulating armor is also wrapped with a floating jacket The floating jacket can make the inner cable float on the sea surface for a short time, and the floating jacket can gradually dissolve in the seawater. The inner sheath 21 is made of rubber material, and the inner sheath 21 is wrapped around the outer wall of the filling layer 22 by heating and extruding. The insulating sheath 23 is made of cross-linked polyethylene material, and the insulating sheath 23 is wrapped around the outer wall of the copper core 24 by heating and extruding. The filling layer 22 is filled with polyester resin material, and the filling layer 22 is filled between the outer wall of the insulating sheath 23 and the inner wall of the inner sheath 21 by heating injection molding.

[0023] In the above embodiments, it should be noted that cross-linked polyethylene is a special cross-linked polymer material with excellent chemical resistance and electrical insulation performance; rubber material is a material with good insulation performance; polyester resin material is one of the commonly used cable insulation materials, which is usually used in medium and high voltage cables. Polyester resin has good electrical insulation performance and mechanical strength; when the submarine cable construction ship puts the cable on the sea surface, the floating jacket wrapped on the surface of the cable makes the cable float on the sea surface for a short time. After the traction device fixes one end of the cable on the shore, the floating jacket gradually dissolves in the seawater, and the cable sinks to the seabed under its own gravity, so as to achieve the effect of making the cable float on the water surface by itself, avoiding the cable being pulled and damaged by the buoy, and there is no need to remove the buoy, which greatly improves the laying efficiency of submarine copper core polyvinyl chloride insulated wires and cables.

[0024] Example 2

[0025] like Figure 1-Figure 4As shown, a copper core polyvinyl chloride insulated wire and cable includes all the contents of embodiment 1, in addition, the insulating armor includes an insulating layer 20 and a waterproof layer 19, the insulating layer 20 is made of polyvinyl chloride, and the insulating layer 20 is wrapped on the outer wall of the inner sheath 21 by heating and extruding, the waterproof layer 19 is made of polyethylene, and the waterproof layer 19 is wrapped on the outer wall of the insulating layer 20 by heating and extruding, the insulating armor includes a steel strand layer 16 and a steel strand layer 2 18, and the steel strand layer 16 and the steel strand layer 2 18 are heated The steel strand layer 18 is woven with galvanized steel wires, the second steel strand layer 18 is fixedly bonded to the outer wall of the waterproof layer 19, the outer wall of the second steel strand layer 18 is bonded with a stranded wire interlayer 17, the steel strand layer 16 is fixedly bonded to the outer wall of the stranded wire interlayer 17, the insulating armor includes an asphalt layer 15, the asphalt layer 15 is wrapped on the outer wall of the steel strand layer 16 by heating and extrusion, the outer wall of the asphalt layer 15 is provided with an outer sheath 14, the outer sheath 14 is made of cross-linked polyethylene, and the outer sheath 14 is wrapped on the outer wall of the asphalt layer 15 by heating and extrusion.

[0026] In the above embodiment, it should be noted that the polyvinyl chloride material used in the insulating layer 20 has a high volume resistivity and surface resistivity, can effectively prevent current leakage and interference, and provide a good electrical insulation effect. The waterproof layer 19 uses a polyethylene material with a high tensile strength and elastic modulus, can protect the cable conductor from damage by external forces, and provide a good waterproof protection effect. The steel strand layer 16 and the steel strand layer 18 are used to achieve the effect of the inner sheath 21 and the internal structure. The steel strand layer 16 and the steel strand layer 18 can improve the structural strength of the cable. The asphalt layer 15 has good waterproofness and wear resistance. The outer sheath 14 has the function of protecting the internal structure. When the floating jacket is dissolved, the outer sheath 14 serves as the outermost layer to protect the internal structure.

[0027] Example 3

[0028] like Figure 1-Figure 4 As shown, a copper core polyvinyl chloride insulated wire and cable includes all the contents of Example 2. In addition, the floating jacket includes a buoyancy layer 12, and the buoyancy layer 12 is made of polyvinyl alcohol. The buoyancy layer 12 is wrapped around the outer wall of the outer sheath 14 by heating and extruding. A plurality of pores 13 are provided in the buoyancy layer 12. The buoyancy layer 12 can be dissolved by seawater. The floating jacket includes a jacket membrane 11, and the jacket membrane 11 is made of polylactic acid-based film material. The jacket membrane 11 is wrapped around the surface of the buoyancy layer 12.

[0029] In the above embodiment, it should be noted that the polyvinyl alcohol material used in the buoyancy layer 12 is a water-soluble polymer, which usually dissolves when in contact with seawater. The polylactic acid-based film material used in the outer shell 11 has a certain degree of hydrophobicity, but will decompose and dissolve after being immersed in water. The pores 13 set in the buoyancy layer 12 provide buoyancy for the cable so that the cable floats on the water surface. After the buoyancy layer 12 contacts with seawater for a certain period of time, the buoyancy layer 12 will dissolve. The outer shell 11 has the function of protecting the buoyancy layer 12 and preventing the buoyancy layer 12 from dissolving too quickly when in contact with water.

[0030] The use process of the utility model is as follows: when a technician in this field operates a submarine cable construction ship to drop the cable onto the sea surface, the buoyancy layer 12 wrapped on the surface of the cable makes the cable float on the sea surface for a short time. After the traction device fixes one end of the cable on the shore, the buoyancy layer 12 and the outer wall mantle 11 gradually dissolve in the seawater, and the cable sinks to the seabed due to its own gravity.

[0031] The above is only a preferred embodiment of the utility model. Any person skilled in the art may modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. A copper core polyvinyl chloride insulated wire and cable, comprising a copper core (24) and an inner sheath (21), wherein the outer wall of the copper core (24) is provided with an insulating sheath (23), the inner wall of the inner sheath (21) is wrapped with a plurality of copper cores (24) and the insulating sheath (23), and a filling layer (22) is provided between the outer wall of the insulating sheath (23) and the inner wall of the inner sheath (21), characterized in that: The outer wall of the inner sheath (21) is provided with an insulating armor, which has water pressure resistance, seawater corrosion resistance and insulation performance. The outer wall of the insulating armor is also wrapped with a floating jacket, which can make the inner cable float on the sea surface for a short time, and the floating jacket can gradually dissolve in the seawater.

2. A copper core polyvinyl chloride insulated wire and cable according to claim 1, characterized in that: The insulating armor comprises an insulating layer (20) and a waterproof layer (19); the insulating layer (20) is made of polyvinyl chloride and is wrapped around the outer wall of the inner sheath (21) by means of heating and extrusion; the waterproof layer (19) is made of polyethylene and is wrapped around the outer wall of the insulating layer (20) by means of heating and extrusion.

3. A copper core polyvinyl chloride insulated wire and cable according to claim 2, characterized in that: The insulating armor comprises a first steel strand layer (16) and a second steel strand layer (18), wherein the first steel strand layer (16) and the second steel strand layer (18) are woven using hot-dip galvanized steel wires, the second steel strand layer (18) is fixedly bonded to the outer wall of the waterproof layer (19), the outer wall of the second steel strand layer (18) is bonded with a stranded wire interlayer (17), and the first steel strand layer (16) is fixedly bonded to the outer wall of the stranded wire interlayer (17).

4. A copper core polyvinyl chloride insulated wire and cable according to claim 3, characterized in that: The insulating armor comprises an asphalt layer (15), the asphalt layer (15) is wrapped around the outer wall of the steel strand layer (16) by means of heating and extrusion, the outer wall of the asphalt layer (15) is provided with an outer sheath (14), the outer sheath (14) is made of cross-linked polyethylene material, and the outer sheath (14) is wrapped around the outer wall of the asphalt layer (15) by means of heating and extrusion.

5. A copper core polyvinyl chloride insulated wire and cable according to claim 4, characterized in that: The floating jacket comprises a buoyancy layer (12), the buoyancy layer (12) is made of polyvinyl alcohol, the buoyancy layer (12) is wrapped around the outer wall of the outer jacket (14) by heating and extruding, a plurality of pores (13) are arranged in the buoyancy layer (12), and the buoyancy layer (12) can be dissolved by seawater.

6. A copper core polyvinyl chloride insulated wire and cable according to claim 5, characterized in that: The floating jacket comprises a jacket membrane (11), the jacket membrane (11) is made of a polylactic acid-based film material, and the jacket membrane (11) is wrapped around the surface of the buoyancy layer (12).

7. The copper core polyvinyl chloride insulated wire and cable according to claim 1, characterized in that: The inner sheath (21) is made of rubber material and is wrapped around the outer wall of the filling layer (22) by heating and extruding. The insulating sheath (23) is made of cross-linked polyethylene material and is wrapped around the outer wall of the copper core (24) by heating and extruding.

8. The copper core polyvinyl chloride insulated wire and cable according to claim 1, characterized in that: The filling layer (22) is filled with polyester resin material, and the filling layer (22) is filled between the outer wall of the insulating sheath (23) and the inner wall of the inner sheath (21) by means of heating injection molding.

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