CN215069323U - Buried cable for anti-insect environment-friendly navigation-aid lamplight loop for airport - Google Patents
Buried cable for anti-insect environment-friendly navigation-aid lamplight loop for airport Download PDFInfo
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Abstract
The utility model provides a pest control environment-friendly type airport is with helping hand buried cable for light circuit, the structure is: a conductor is wrapped by a conductor shielding layer, an XLPE insulating layer, a semi-conductive insulating shielding layer and a metal shielding layer to form a wire core; the wire core is coated with an outer sheath; the conductor is formed by twisting bare copper monofilaments, and the direct current resistance of the conductor at 20 ℃ is less than or equal to 3.08 omega/km; the thickness of the conductor shielding layer is 0.44-0.60 mm; the thickness of the XLPE insulating layer is 2.52-3.0 mm; the thickness of the semiconductive insulation shielding layer is 0.44-0.60 mm; the metal shielding layer is formed by lapping a layer of soft copper tape; the outer sheath is made of a sheath material containing cycloakyl trione. On the basis of newly designing a cable shape structure, the cable simultaneously uses high-quality materials and specific structural parameters thereof to achieve the effects of improving the external electromagnetic interference resistance and insect prevention, and can be suitable for being selected and used in an environment with higher requirements on insect prevention in an airport.
Description
Technical Field
The utility model relates to a pest control environment-friendly airport is with helping hand navigation light return circuit is with burying ground cable is applicable to rated voltage 5 kV's power cable, belongs to cable technical field.
Background
The navigation aid light signal cable for the airport runway aims to meet the walking path of the airplane during takeoff, landing and sliding, and particularly avoids safety accidents or hidden dangers caused by all tiny details in the criss-cross places of the runway. This requires that the cable be able to operate reliably and stably for a long period of time in harsh environments and transmit signals accurately and without errors.
Particularly, for buried cables, the cables are required to have high anti-interference performance. In addition, due to the buried use scene, the cable is required to have the performance of preventing insects and gnawing.
In the existing similar cables, the method for preventing insect pests is mainly a chemical method, wherein the chemical method is to add chemical agents into the cable sheath material so that insect pests are killed or avoided when approaching or biting the cable outer sheath. At present, low-toxicity repellent agents are mainly used and play a role in repelling according to smell or stimulation on olfactory and gustatory mucous membranes when the materials are contacted with the materials, but the materials have the defects that (1) chemical drugs contained in a sheath migrate to cause environmental pollution; (2) due to the heat effect of the cable, the insect-resistant medicament contained in the sheath is aged and slowly released, so that the insect-resistant performance of the cable is reduced; (3) in the processing process of the cable insect-proof sheath layer, harmful gas is emitted to cause health hazard to producers; (4) the development of the method is restricted by the contradiction between the toxicity and the timeliness of the protective agent.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Satisfy a pest control environment-friendly type airport with helping hand navigation light return circuit with burying ground cable to needs, the utility model discloses the problem that the cable need be solved mainly has:
the method combines the prior MH/T6049 and the industrial requirements, defines the method for examining the buried cable for the insect-resistant environment-friendly navigation light circuit for the airport, and aims at the method to further improve the performances of the cable such as electromagnetic interference resistance, insect damage resistance and the like.
The technical scheme adopted for solving the technical problems is as follows:
an insect-resistant environment-friendly buried cable for a navigation-aid light circuit for an airport,
the outer diameter range of the buried cable is 13.4-15.9 mm; the buried cable has the structure that: a conductor shielding layer 2, an XLPE insulating layer 3, a semi-conductive insulating shielding layer 4 and a metal shielding layer 5 are coated outside the conductor 1 to form a wire core; the wire core is coated with an outer sheath 6;
the conductor 1 is formed by twisting bare copper monofilaments, and the diameter range of the bare copper monofilaments is 1.03-1.05 mm; the diameter range of the conductor is 3.1-3.3 mm, the stranding direction of the bare copper monofilament is the left direction, and the stranding pitch diameter ratio is 12-20 times; the direct current resistance of the conductor at 20 ℃ is less than or equal to 3.08 omega/km;
the conductor shielding layer 2 is made of a conductor shielding material, and the thickness of the conductor shielding layer is 0.44-0.60 mm;
the XLPE insulating layer 3 is made of XLPE insulating materials, and the thickness of the XLPE insulating layer is 2.52-3.0 mm;
the semiconductive insulation shielding layer 4 is made of a semiconductive insulation shielding material, and the thickness of the semiconductive insulation shielding layer is 0.44-0.60 mm;
the metal shielding layer 5 is formed by lapping a layer of soft copper strips in an overlapping way, the thickness of the thinnest part of each soft copper strip is not less than 0.07mm, the width of each soft copper strip is 20mm, the minimum lapping rate of the overlapping lapping is not less than 15%, and the lapping direction of each soft copper strip is in the left direction;
the outer sheath is made of sheathing material containing cycloakyl trione, and the sheathing material is 90 ℃ protection level insect-resistant polyethylene plastic sheathing material or 90 ℃ protection level insect-resistant polyvinyl chloride plastic sheathing material; the minimum nominal thickness of the outer sheath is 1.8mm, and the thinnest point thickness is not less than 1.40 mm.
The biological prevention effect is achieved by adding cycloakyl trione into the sheathing material.
The cross section area of the conductor is 6mm2For a cable with a voltage rating of 5 kV:
the conductor is formed by stranding 7 bare copper monofilaments with the monofilament diameter range of 1.02-1.04 mm;
the thickness of the XLPE insulating layer 3 is 2.8 mm;
the thickness of the outer sheath is 1.8 mm.
The conductor has smooth surface, no oil stain, no damage to shielding and insulating burr and sharp edge, and no raised or broken single line.
The design of the cable is described as follows:
aiming at the problems that the chemical method in the prior art can not meet the requirement of insect prevention (mainly termite) and the timeliness is not long after the chemical method achieves the insect prevention effect, the specific structure of the cable solves the problems of pollution of toxic substances of the chemical method to the natural environment, damage to the ecological environment and the like, can ensure long-term effective termite prevention performance, and does not need to adopt a construction method to prevent auxiliary protection of the termite.
In the prior art, a cable conductor is generally formed by twisting a plurality of conducting wires, and when the insulation is extruded, the phenomena of unsmooth surfaces such as local gaps, burrs and the like between the surface of the conductor and an insulation layer are avoided, so that electric field concentration is caused, local air gap discharge and branch discharge are caused, and the electric resistance of the cable conductor is reduced. A layer of semi-conductive material (conductor shield) is extruded between the surface of the conductor and the insulating layer, and can be in close contact with the insulation, and meanwhile, due to the equipotential of the semi-conductive layer and the conductor, although an air gap exists between the semi-conductive layer and the conductor, no electric field effect exists due to the equipotential of the periphery of the semi-conductive layer and the conductor, and therefore the generation of partial discharge is avoided.
The insulation shield mainly plays a role in homogenizing an electric field, and avoids point discharge caused by unevenness of an insulation layer; the insulating layer bears voltage to ensure the normal operation of the cable, and the semi-conductive insulating shielding layer mainly plays a role in protecting insulation and homogenizing an electric field and can well ensure the stability of the electric field during the operation of the cable; the metal shielding layer flows through capacitance current under normal conditions, serves as a channel of short-circuit current during short circuit (fault), shields an electric field in insulation (reduces electromagnetic interference to the outside), enables the electric field to be uniform (radial electric field), and mainly plays a role in bearing the short-circuit current and shielding electromagnetic field interference.
The conductor adopts 2 types of round pressing structures, and conductor stranding has the characteristics of softness, stability, reliability, high mechanical strength and the like. Adopt many thin wires to strand into the conductor, the position of each single line all can be in the stranded conductor in turn around, when the stranded conductor is crooked, the extension power and the compressive force that every single line received all equal, and the single line can not produce extension and compression, and the stranded conductor can not produce plastic deformation yet, crooked more smoothly distribute on one section sinle silk, be difficult to harm the insulation of cable, the compliance and the stability of conductor all can improve greatly.
The conductor twisting mode adopts regular twisting, and the geometric relation of the conductor of the structure is concise and high in stability. The smaller the twisted joint warp ratio is, the higher the flexibility of the stranded wire is, the diameter of the outline of the conductor can be reduced by adopting the compressed conductor, meanwhile, the diameter of each layer structure of the cable can be reduced, the cable material can be saved, the surface of the conductor is smooth by compressing, the phenomenon that the semi-conductive shielding or insulation is extruded into the gaps of the conductive wire cores to increase the partial discharge is prevented, and the compressed conductor has a certain longitudinal water-blocking effect.
Advantageous effects
After the technical scheme is adopted, the utility model discloses following beneficial effect has:
(1) the cable structure has simple and reasonable design: the single-core cable is simple in structure, the conductor is externally extruded with the conductor shield, the cross-linked polyethylene insulation and the semi-conductive insulation shield by adopting a three-layer co-extrusion process, the wire core is externally wrapped with a soft copper strip layer, the processing procedure is simple, and the production efficiency is improved.
(2) A layer of soft copper tape is wrapped outside the wire core, so that the effect of resisting external electromagnetic field interference can be achieved.
(3) The metal shielding outer extruded 90 ℃ protection level insect-resistant polyethylene plastic or 90 ℃ protection level insect-resistant polyvinyl chloride plastic sheath material (determined according to a use scene) can well ensure that cables laid underground can not be gnawed by insect pests and ensure safe operation of the cables.
(4) The biological prevention effect is achieved by adding cycloakyl trione into the sheathing material.
The utility model discloses the cable has used high-quality material and specific structural parameter in order to reach the effect that improves anti external electromagnetic interference and insect control simultaneously on the basis of new design cable shape structure to can be suitable for the airport and select the use under the higher environment of insect control requirement.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: the cable comprises a conductor 1, a conductor shielding layer 2, an XLPE insulating layer 3, a semi-conductive insulating shielding layer 4, a metal shielding layer 5 and an outer sheath 6.
Detailed Description
The present disclosure is further described with reference to the following drawings and detailed description:
as shown in figure 1, the buried cable for the anti-insect environment-friendly navigation aid lamplight circuit for the airport has the outer diameter range of 13.4-15.9 mm; the buried cable has the structure that: a conductor shielding layer 2, an XLPE insulating layer 3, a semi-conductive insulating shielding layer 4 and a metal shielding layer 5 are coated outside the conductor 1 to form a wire core; the wire core is coated with an outer sheath 6;
the conductor 1 is a type 2 circular compacted structure; the conductor 1 is formed by twisting bare copper monofilaments, and the diameter range of the bare copper monofilaments is 1.03-1.05 mm; the diameter range of the conductor is 3.1-3.3 mm, the stranding direction of the bare copper monofilament is the left direction, and the stranding pitch diameter ratio is 12-20 times; the direct current resistance of the conductor at 20 ℃ is less than or equal to 3.08 omega/km;
the conductor shielding layer 2 is made of a conductor shielding material (in this example, 35kV or less cross-linkable semi-conductive inner shielding material YPJ-10), and the thickness thereof is 0.44-0.60 mm;
the XLPE insulating layer 3 is made of XLPE insulating materials, and the thickness of the XLPE insulating layer is 2.52-3.0 mm;
the semiconductive insulation shield layer 4 is made of a semiconductive insulation shield material (in this example, 35kV or less strippable cross-linked semiconductive outer shield material YPB-10), and has a thickness of 0.44-0.60 mm;
the metal shielding layer 5 is formed by lapping a layer of soft copper strips in an overlapping way, the thickness of the thinnest part of each soft copper strip is not less than 0.07mm, the width of each soft copper strip is 20mm, the minimum lapping rate of the overlapping lapping is not less than 15%, and the lapping direction of each soft copper strip is in the left direction;
the outer sheath is made of sheathing material containing cycloakyl trione, and the sheathing material is 90 ℃ protection level insect-resistant polyethylene plastic sheathing material or 90 ℃ protection level insect-resistant polyvinyl chloride plastic sheathing material; the minimum nominal thickness of the outer sheath is 1.8mm, and the thinnest point thickness is not less than 1.40 mm.
In this example, the cross-sectional area of the conductor is 6mm in accordance with the specification2For a cable with a voltage class of 5kV, the outer diameter of the cable is 13.4-15.9 mm, the outer diameter of the cable is 14.5mm, and the acceptable outer diameter range is 13.4-15.9 mm according to processing conditions.
The conductor 1 is formed by stranding 7 bare copper monofilaments with the monofilament diameter range of 1.02-1.04 mm; the thickness of the XLPE insulating layer 3 is 2.8 mm; the thickness of the outer sheath 6 is 1.8 mm.
The cable of the embodiment mainly has the following performances:
1. good waterproof, dampproof and low temperature resistance (the cable of the embodiment adopts 90 ℃ protection level insect-resistant polyethylene plastic sheathing material)
In order to ensure that the cable has good waterproof performance, the outer sheath of the cable is made of polyethylene, and the polyethylene material has the characteristics of good low-temperature resistance, low water permeability and the like, so that the invasion of water is prevented, and the cable is suitable for a low-temperature environment.
After the test is passed, a cable sample is immersed into water for 3m (15-30 ℃) for 72 hours, the structure outside the insulating layer is removed, and the outer surface layer of the insulating layer has no visible moisture.
2. Good insect pest resistance
According to the differentiation and metering standard established by WHO, mosquitoes are respectively contacted with 4% (1.428 g/m)2) DDT and 0.05% (0.0718 g/m)2) Deltamethrin is fed for 60min, the breeding is resumed for 24h, the death number is observed, the death rate is calculated, and the resistance level is judged according to the death rate.
Meanwhile, the knockdown number of the mosquito contacting the medicinal paper for 10 min, 15 min, 20 min, 30 min, 40 min, 50 min and 60min is observed, and the knockdown rate is calculated.
Blank control is set in the test, and the number of mosquitoes in each test is not less than 100.
The test data of the performance and the mechanical performance of the cable are as follows:
Claims (6)
1. a buried cable for an insect-attack-prevention environment-friendly navigation-aid lamplight loop for an airport is characterized in that the outer diameter range of the buried cable is 13.4-15.9 mm; the buried cable is characterized in that the buried cable has the structure as follows: a conductor is wrapped by a conductor shielding layer, an XLPE insulating layer, a semi-conductive insulating shielding layer and a metal shielding layer to form a wire core; the wire core is coated with an outer sheath;
the conductor is formed by twisting bare copper monofilaments, and the diameter range of the bare copper monofilaments is 1.03-1.05 mm; the diameter range of the conductor is 3.1-3.3 mm, the stranding direction of the bare copper monofilament is the left direction, and the stranding pitch diameter ratio is 12-20 times; the direct current resistance of the conductor at 20 ℃ is less than or equal to 3.08 omega/km;
the conductor shielding layer is made of conductor shielding materials;
the XLPE insulating layer is made of XLPE insulating materials, and the thickness of the XLPE insulating layer is 2.52-3.0 mm;
the semiconductive insulating shielding layer is made of a semiconductive insulating shielding material;
the metal shielding layer is formed by overlapping and wrapping a layer of soft copper belt, the thickness of the thinnest part of the soft copper belt is not less than 0.07mm, the width of the soft copper belt is 20mm, the minimum overlapping rate of the overlapping and wrapping is not less than 15%, and the wrapping direction of the soft copper belt is in the left direction;
the nominal thickness of the outer sheath is not less than 1.8 mm.
2. The buried cable for the navigation aid lighting circuit for the insect-protected and environment-friendly airport according to claim 1, wherein the cross-sectional area of the conductor is 6mm2The voltage grade is 5 kV; the conductor is formed by stranding 7 bare copper monofilaments with the monofilament diameter range of 1.02-1.04 mm.
3. The buried cable for the pest-control environment-friendly navigation aid lighting circuit for the airport according to claim 1, wherein the conductor shielding layer is made of a conductor shielding material, and the thickness of the conductor shielding layer is 0.44-0.60 mm.
4. The buried cable for a navigation aid lighting circuit for an airport of insect protected as claimed in claim 1 wherein said XLPE insulation layer has a thickness of 2.8 mm.
5. The buried cable for the pest-control environment-friendly navigation light circuit for the airport according to claim 1, wherein the semi-conductive insulating shielding layer is made of a semi-conductive insulating shielding material, and the thickness of the semi-conductive insulating shielding material is 0.44-0.60 mm.
6. The buried cable for the pest-control environment-friendly navigation light circuit for an airport according to claim 1, wherein the nominal thickness of the outer sheath is 1.8mm, and the thinnest point thickness is not less than 1.40 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121202388.5U CN215069323U (en) | 2021-05-28 | 2021-05-28 | Buried cable for anti-insect environment-friendly navigation-aid lamplight loop for airport |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121202388.5U CN215069323U (en) | 2021-05-28 | 2021-05-28 | Buried cable for anti-insect environment-friendly navigation-aid lamplight loop for airport |
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| Publication Number | Publication Date |
|---|---|
| CN215069323U true CN215069323U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121202388.5U Active CN215069323U (en) | 2021-05-28 | 2021-05-28 | Buried cable for anti-insect environment-friendly navigation-aid lamplight loop for airport |
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| CN (1) | CN215069323U (en) |
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- 2021-05-28 CN CN202121202388.5U patent/CN215069323U/en active Active
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