CN214377739U - Intelligent monitoring aerial insulated cable with self-round high-strength composite bearing conductor - Google Patents
Intelligent monitoring aerial insulated cable with self-round high-strength composite bearing conductor Download PDFInfo
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- CN214377739U CN214377739U CN202120757283.XU CN202120757283U CN214377739U CN 214377739 U CN214377739 U CN 214377739U CN 202120757283 U CN202120757283 U CN 202120757283U CN 214377739 U CN214377739 U CN 214377739U
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Abstract
The utility model relates to a from compound overhead insulated cable of bearing conductor intelligent monitoring of whole high strength of circle belongs to cable technical field. The technical scheme is as follows: the monitoring unit comprises a plurality of monitoring optical fibers (1), a nickel-based steel sleeve (3) and an aluminum adhering layer (4) from inside to outside in sequence, and watertight factice (2) is arranged among the monitoring optical fibers in the nickel-based steel sleeve; multiple layers of aluminum or aluminum alloy (5) are stranded outside the monitoring unit to form a conductor, and each layer of aluminum or aluminum alloy is formed by stranding a plurality of aluminum or aluminum alloy monofilaments; a conductor shielding layer (6) and an insulating layer (7) are sequentially arranged outside the conductor. The monitoring unit of the utility model has the functions of intelligent monitoring, line loss reduction, current carrying capacity improvement, corrosion resistance enhancement and bearing; the aluminum-clad nickel-based steel sleeve is a non-magnetic conductive material, so that the self-loss of the circuit can be effectively reduced; the outer surface of the conductor is smoother and more round, so that the electric field distortion caused by the conductor out-of-round in a high electric field operation environment is reduced, and the insulation electric stress level of the cable is improved.
Description
Technical Field
The utility model relates to a from compound overhead insulated cable of bearing conductor intelligent monitoring of whole high strength of circle belongs to cable technical field.
Background
The overhead insulated cable is an overhead conductor with an insulating layer and a protective sheath, is a special cable manufactured by a production process similar to a crosslinked cable, and is a power transmission mode between the overhead conductor and an underground cable. Overhead cables are widely applied to power transmission at home and abroad, but with the development of cities and villages at home and abroad, the requirements of line load increase, wiring space limitation, intelligent monitoring and control, line insulation level and self-bearing capacity are urgently needed to be further improved. The aerial insulated cable conductor in the prior art is not round, and is easy to cause electric field distortion in a high electric field operation environment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a from compound overhead insulated cable of bearing conductor intelligent monitoring of whole high strength of circle can realize the high load transmission, lays the demand space little, decreases from the fact little, the line insulation level is high, can intelligent monitoring control, has solved the problem that exists among the background art.
The technical scheme of the utility model is that:
a self-rounding high-strength composite bearing conductor intelligent monitoring overhead insulated cable comprises a monitoring unit, a conductor shielding layer and an insulating layer, wherein the monitoring unit sequentially comprises a plurality of monitoring optical fibers, a nickel-based steel sleeve and an adhered aluminum layer from inside to outside, and watertight factice is arranged among the monitoring optical fibers in the nickel-based steel sleeve; multiple layers of aluminum or aluminum alloy are stranded outside the monitoring unit to form a conductor, and each layer of aluminum or aluminum alloy is formed by stranding a plurality of aluminum or aluminum alloy monofilaments; and a conductor shielding layer and an insulating layer are sequentially arranged outside the conductor.
The cross section of the monitoring unit is circular, and the number of the monitoring units is one.
The conductor shielding layer is made of a thermoplastic or cross-linked semiconductive shielding material with the temperature resistance level of 105 ℃, the volume resistivity of the semiconductive shielding material at 105 ℃ is not more than 300 omega cm, and the thickness of the conductor shielding layer is 0.15mm-0.6 mm.
The insulating layer is made of a cross-linked polyethylene material or a polyethylene material, the temperature resistance level of the cross-linked polyethylene material or the polyethylene material is not less than 105 ℃, the color is black or other colors, the accumulated resistivity of the insulator is high, the electrical performance is excellent, and the insulating level can be improved.
The insulating layer is of a thinning structure, and the thickness of the insulating layer is 0.11U according to line voltage S =
Wherein, S = thickness, unit mm
U = rated voltage, unit kV
The dielectric strength of the insulating layer is not less than 35kV/mm at 20 ℃.
The thickness of the insulating layer is 2.3mm-7.62 mm.
Preferably, the thickness of the insulating layer is 2.3mm-4.45 mm.
The voltage level covers 6000V-46000V.
The conductor shielding layer and the insulating layer are extruded in a co-extrusion mode, high-temperature and high-pressure vulcanization is carried out through a vulcanization pipeline after the conductor shielding layer and the insulating layer are extruded, the conductor shielding layer and the insulating layer can be tightly attached, no air gap exists, and the cable can be safely and stably operated under high-voltage field intensity.
The nickel-based steel sleeve and the adhered aluminum layer form an aluminum-coated nickel-based steel sleeve of an integral structure through longitudinal coating, welding and drawing, the monitoring optical fibers are loosely arranged in the aluminum-coated nickel-based steel sleeve, the watertight factice is scattered around the monitoring optical fibers, the filling is dense, and the aluminum-coated nickel-based steel sleeve is packaged outside; the monitoring optical fiber is an SMF-128 optical fiber, and a cladding layer with the temperature resistance level of 250-400 ℃ is adopted. The thickness of the adhered aluminum layer is not less than 10% of the radius of the monitoring unit.
The monitoring optical fibers are temperature-sensing monitoring optical fibers, 2-6 temperature-sensing monitoring optical fibers are placed in the aluminum-clad nickel-based steel sleeve, the diameter range of the aluminum-clad nickel-based steel sleeve is phi 3.5 mm-phi 5.0mm, and the aluminum-clad nickel-based steel sleeve is made of a non-magnetic material, so that the self-loss of a line can be effectively reduced. The density of the aluminum-coated nickel-based steel sleeve is not more than 6.59 g/mm2Tensile strength is not less than 1310MPa, and elongation 1% strength is not less than MPa; the conductor resistivity at 20 ℃ is not more than 84.8 n.OMEGA.m.
The density of the aluminum or aluminum alloy monofilament is not more than 2.703g/mm2An average tensile strength of not less than 175 MPa; the single tensile strength is not less than 165 MPa; an average 250mm elongation of not less than 1.7%; the single 250mm elongation is not less than 1.5%.
The aluminum or the aluminum alloy is two layers, namely inner aluminum or the aluminum alloy and outer aluminum or the aluminum alloy, and the outer aluminum or the aluminum alloy is stranded outside the inner aluminum or the aluminum alloy; the inner layer aluminum or aluminum alloy and the outer layer aluminum or aluminum alloy are formed by twisting a plurality of inner layer aluminum or aluminum alloy monofilaments and outer layer aluminum or aluminum alloy monofilaments respectively. The inner arc surface of the inner layer aluminum or aluminum alloy monofilament is tightly attached to the monitoring unit, the inner arc surface of the outer layer aluminum or aluminum alloy monofilament is tightly attached to the outer surface of the inner layer aluminum or aluminum alloy monofilament, the side surfaces of adjacent aluminum or aluminum alloy monofilaments are attached to each other, the outer surface of the conductor is guaranteed to be smooth and round, and electric field distortion caused by unevenness of the surface of the conductor is reduced.
The inner layer aluminum or aluminum alloy monofilament and the outer layer aluminum or aluminum alloy monofilament are both tile-shaped monofilament structures; the tile-shaped monofilament structure comprises a first side face, a second side face, an inner arc face and an outer arc face, wherein two ends of the inner arc face are connected with two ends of the outer arc face through the first side face and the second side face respectively; the first side face is formed by sequentially connecting a first plane, an outer vertex angle arc face and a third plane, the second side face is formed by connecting a second plane, an inner vertex angle arc face and a fourth plane, one end of an inner arc face is connected with the first plane through the first arc face, the third plane is connected with one end of an outer arc face through the second arc face, the other end of the outer arc face is connected with the fourth plane through the third arc face, and the second plane is connected with the other end of the inner arc face through the fourth arc face; the first side face is matched with the second side face, the inner arc surface of the inner layer aluminum or aluminum alloy monofilament is matched with the outer surface of the monitoring unit, and the outer arc surface of the inner layer aluminum or aluminum alloy monofilament is matched with the inner arc surface of the outer layer aluminum or aluminum alloy monofilament; the cross section lengths of the first plane, the second plane, the third plane and the fourth plane are equal.
And the radius of the inner vertex angle cambered surface and the radius of the outer vertex angle cambered surface are not more than 0.3 mm. The inner arc surface, the outer arc surface and the transition arc surfaces among the planes are all in a fillet structure, and the filleting angles of the inner vertex angle arc surface and the outer vertex angle arc surface are 0.15-0.5 mm; preferably 0.2-0.3 mm.
The tile-shaped monofilament structure is designed into four planes and eight arc surfaces. The inner cambered surface of the inner aluminum or aluminum alloy monofilament 8 is tightly attached to the outer surface of the monitoring unit, the outer cambered surface of the inner aluminum or aluminum alloy monofilament is tightly attached to the inner cambered surface of the outer aluminum or aluminum alloy monofilament, and after doubling, the first side surface and the second side surface of the adjacent tile-shaped monofilament structure are tightly contacted with each other and mutually condensed; the outer arc surface of the stranded inner layer aluminum or aluminum alloy monofilament and the outer arc surface of the stranded outer layer aluminum or aluminum alloy monofilament mutually form a complete circular arc surface respectively, and the arc surfaces are smooth and round, so that the balance of electric field intensity during the pressurized operation of the cable is ensured.
The height and the width of the aluminum or aluminum alloy monofilament are changed along with the change of the specification and the number, the tile-shaped height and the tile-shaped width are related to the specification and the number, and the number of layers is related to the specification and the number; the larger the specification is, the fewer the number is, and the corresponding height and width are increased; the smaller the specification, the more the number, the corresponding height and width decrease.
The utility model has the advantages that:
1. the monitoring unit plays the roles of intelligent monitoring, line loss reduction, current carrying capacity improvement, corrosion resistance enhancement and bearing, and can particularly bear and enhance in high-temperature operation and short circuit; the aluminum-clad nickel-based steel sleeve is a non-magnetic conductive material, so that the self-loss of the circuit can be effectively reduced; the aluminum layer is adhered to the surface of the nickel-based steel sleeve, so that the corrosion prevention problem of the nickel-based steel sleeve is effectively solved, the current capacity is transmitted together with the outer aluminum or aluminum alloy monofilament in the operation process, and the current carrying capacity of the conductor is improved;
2. the conductor adopts a tile-shaped monofilament structure, the outer surface is smoother and round, the electric field distortion in a high electric field operation environment caused by the non-round conductor is reduced, and the insulation electric stress level of the cable is improved; the conductor shielding layer and the insulating layer are thinned, so that the consumption of raw materials is reduced, and the product competitiveness is improved;
3. the conductor shielding layer and the insulating layer can be vulcanized and bonded by adopting the 105 ℃ high temperature resistant conductor shielding layer and the insulating layer, optimizing the co-extrusion process and optimizing the vulcanization pipeline process and parameters, so that the insulating electric stress resistance level of the protective layer is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a partial schematic view of the present invention;
in the figure: the monitoring device comprises a monitoring optical fiber 1, watertight factice 2, a nickel-based steel sleeve 3, an adhered aluminum layer 4, aluminum or aluminum alloy 5, a conductor shielding layer 6, an insulating layer 7, an inner layer aluminum or aluminum alloy monofilament 8, an outer layer aluminum or aluminum alloy monofilament 9, an inner arc surface 10, an outer arc surface 11, an outer vertex angle arc surface 12, an inner vertex angle arc surface 13, a plane three 14, a plane four 15, a plane one 16 and a plane two 17.
Detailed Description
The present invention will be further described with reference to the accompanying drawings by way of examples.
In the embodiment, referring to the attached figure 1, the intelligent monitoring overhead insulated cable for the self-rounding high-strength composite load-bearing conductor sequentially comprises monitoring optical fibers 1, a nickel-based steel sleeve 3, an adhered aluminum layer 4, multiple layers of aluminum or aluminum alloy, a conductor shielding layer 6 and an insulating layer 7 from inside to outside, wherein the monitoring optical fibers 1 are loosely arranged in the nickel-based steel sleeve 3, and watertight factice 2 is filled among the monitoring optical fibers 1 in the nickel-based steel sleeve 3; an aluminum layer 4 is adhered outside the nickel-based steel sleeve 3 to form an aluminum-coated nickel-based steel sleeve; the monitoring optical fiber 1, the nickel-based steel sleeve 3 and the adhered aluminum layer 4 are combined to form a monitoring unit; multiple layers of aluminum or aluminum alloy are stranded outside the monitoring unit through doubling, aluminum or aluminum alloy monofilaments are combined and rotated through a smooth transition conical device in the doubling process to form a conductor with a smooth, compact, round and self-locking intelligent monitoring function, and a conductor shielding layer 6 with the heat resistance grade of 105 ℃ thermoplastic or thermosetting is extruded outside the conductor and used for homogenizing an electric field when high-voltage current is applied to the conductor; an insulating layer 7 with the thickness of 2.3-7.62mm is extruded outside the conductor shielding layer 6; the insulating layer 7 is made of UV and temperature resistant thermoplastic polyethylene or thermosetting cross-linked polyethylene with the temperature of 105 ℃, and the insulating material has higher dielectric strength than the conventional material.
The conductor shielding layer 6 and the insulating layer 7 are extruded in a co-extrusion mode, namely the conductor shielding layer 6 and the insulating layer 7 are arranged in two extruders, one extruder is used for extruding the conductor shielding layer, the other extruder is used for extruding the insulating layer, and the conductor shielding layer 6 and the insulating layer 7 are molded in the same machine head; and heating and vulcanizing through a vulcanizing pipeline after molding, introducing nitrogen for pressurizing and protecting the front section in the pipeline in the vulcanizing process, and cooling the rear section by adopting cold water. The key for ensuring that the product can reach the expected design of the product is through the production mode.
The set temperature of the vulcanizing pipeline is controlled within the control ranges of 360℃ +/-15 ℃, 350℃ +/-15 ℃, 340℃ +/-15 ℃, 320℃ +/-15 ℃, 300℃ +/-15 ℃, 280℃ +/-15 ℃, 260℃ +/-15 ℃ and 240℃ +/-15 ℃.
The purity of the nitrogen is not less than 99.95 percent, and the pressure is controlled between 0.75MPa and 1.1 MPa.
The aluminum or aluminum alloy monofilaments are of tile-shaped monofilament structures and are mutually interlocked; the aluminum or aluminum alloy monofilament is formed by drawing the aluminum or aluminum alloy monofilament for multiple times through a specially designed drawing tool, and the reduction rate of each time is not more than 10%.
Referring to fig. 2, the inner layer aluminum or aluminum alloy monofilament 8 and the outer layer aluminum or aluminum alloy monofilament 9 are both tile-shaped monofilament structures; the tile-shaped monofilament structure comprises a first side face, a second side face, an inner arc face 10 and an outer arc face 11, wherein two ends of the inner arc face are respectively connected with two ends of the outer arc face through the first side face and the second side face; the first side face is formed by sequentially connecting a first plane 16, an outer vertex angle arc face 12 and a third plane 14, the second side face is formed by connecting a second plane 17, an inner vertex angle arc face 13 and a fourth plane 15, one end of the inner arc face 10 is connected with the first plane 16 through a first arc face, the third plane 14 is connected with one end of the outer arc face 11 through a second arc face, the other end of the outer arc face 11 is connected with the fourth plane 15 through a third arc face, and the second plane 17 is connected with the other end of the inner arc face 10 through a fourth arc face; the first side face is matched with the second side face, the inner arc face of the inner layer aluminum or aluminum alloy monofilament 8 is matched with the outer surface of the monitoring unit, and the outer arc face of the inner layer aluminum or aluminum alloy monofilament 8 is matched with the inner arc face of the outer layer aluminum or aluminum alloy monofilament 9; the cross section lengths of the first plane, the second plane, the third plane and the fourth plane are equal.
And the radius of the inner vertex angle cambered surface and the radius of the outer vertex angle cambered surface are not more than 0.3 mm. The inner arc surface, the outer arc surface and the transition arc surfaces among the planes are all in a fillet structure, and the filleting angles of the inner vertex angle arc surface and the outer vertex angle arc surface are 0.15-0.5 mm; preferably 0.2-0.3 mm.
The tile-shaped monofilament structure is designed into four planes and eight arc surfaces. The inner arc surface of the inner layer aluminum or aluminum alloy monofilament 8 is tightly attached to the outer surface of the monitoring unit, the outer arc surface of the inner layer aluminum or aluminum alloy monofilament 8 is tightly attached to the inner arc surface of the outer layer aluminum or aluminum alloy monofilament 9, and after doubling, the first side surface and the second side surface of the adjacent tile-shaped monofilament structure are tightly contacted with each other and mutually condensed; the outer arc surface of the stranded inner layer aluminum or aluminum alloy monofilament 8 and the outer arc surface of the stranded outer layer aluminum or aluminum alloy monofilament 9 form a complete circular arc surface respectively, and the arc surfaces are smooth and round, so that the balance of the electric field intensity of the cable in pressurized operation is ensured.
Claims (6)
1. The utility model provides a compound overhead insulated cable of bearing conductor intelligence control from rounding high strength which characterized in that: the monitoring device comprises a monitoring unit, a conductor shielding layer (6) and an insulating layer (7), wherein the monitoring unit comprises a plurality of monitoring optical fibers (1), a nickel-based steel sleeve (3) and an adhesion aluminum layer (4) from inside to outside in sequence, and watertight factice (2) is arranged among the monitoring optical fibers (1) in the nickel-based steel sleeve (3); multiple layers of aluminum or aluminum alloy (5) are stranded outside the monitoring unit to form a conductor, and each layer of aluminum or aluminum alloy is formed by stranding a plurality of aluminum or aluminum alloy monofilaments; a conductor shielding layer (6) and an insulating layer (7) are sequentially arranged outside the conductor.
2. The intelligent monitoring overhead insulated cable of self-rounding high-strength composite load-bearing conductor according to claim 1, characterized in that: the cross section of the monitoring unit is circular, and the number of the monitoring units is one.
3. The intelligent monitoring overhead insulated cable of self-rounding high-strength composite load-bearing conductor according to claim 1 or 2, characterized in that: the conductor shielding layer is made of a thermoplastic or cross-linked semi-conductive shielding material with the temperature resistance level of 105 ℃.
4. The intelligent monitoring overhead insulated cable of self-rounding high-strength composite load-bearing conductor according to claim 1 or 2, characterized in that: the insulating layer is made of cross-linked polyethylene material or polyethylene material.
5. The intelligent monitoring overhead insulated cable of self-rounding high-strength composite load-bearing conductor according to claim 1 or 2, characterized in that: the nickel-based steel sleeve (3) and the adhesive aluminum layer (4) are longitudinally wrapped, welded and drawn to form an aluminum-coated nickel-based steel sleeve of an integral structure, the monitoring optical fibers (1) are temperature sensing monitoring optical fibers, 2-6 temperature sensing monitoring optical fibers are placed in the aluminum-coated nickel-based steel sleeve, the diameter range of the aluminum-coated nickel-based steel sleeve is phi 3.5 mm-phi 5.0mm, and the aluminum-coated nickel-based steel sleeve is made of a non-magnetic material.
6. The intelligent monitoring overhead insulated cable of self-rounding high-strength composite load-bearing conductor according to claim 1 or 2, characterized in that: the aluminum or aluminum alloy (5) is divided into two layers, namely inner aluminum or aluminum alloy and outer aluminum or aluminum alloy, and the outer aluminum or aluminum alloy is stranded outside the inner aluminum or aluminum alloy; the inner layer aluminum or aluminum alloy and the outer layer aluminum or aluminum alloy are formed by twisting a plurality of inner layer aluminum or aluminum alloy monofilaments (8) and outer layer aluminum or aluminum alloy monofilaments (9) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120757283.XU CN214377739U (en) | 2021-04-14 | 2021-04-14 | Intelligent monitoring aerial insulated cable with self-round high-strength composite bearing conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120757283.XU CN214377739U (en) | 2021-04-14 | 2021-04-14 | Intelligent monitoring aerial insulated cable with self-round high-strength composite bearing conductor |
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| Publication Number | Publication Date |
|---|---|
| CN214377739U true CN214377739U (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120757283.XU Active CN214377739U (en) | 2021-04-14 | 2021-04-14 | Intelligent monitoring aerial insulated cable with self-round high-strength composite bearing conductor |
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|---|---|
| CN (1) | CN214377739U (en) |
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2021
- 2021-04-14 CN CN202120757283.XU patent/CN214377739U/en active Active
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