CN210200330U - Ethylene-propylene insulating chlorosulfonated polyethylene sheath polyurethane protective layer degaussing cable - Google Patents
Ethylene-propylene insulating chlorosulfonated polyethylene sheath polyurethane protective layer degaussing cable Download PDFInfo
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- CN210200330U CN210200330U CN201822266045.XU CN201822266045U CN210200330U CN 210200330 U CN210200330 U CN 210200330U CN 201822266045 U CN201822266045 U CN 201822266045U CN 210200330 U CN210200330 U CN 210200330U
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Abstract
The utility model relates to an EPT insulation chlorosulfonated polyethylene sheath polyurethane protective layer demagnetization cable. Including tinned copper wire conductor (1), set up ethylene-propylene insulation rubber insulating layer (2) outward tinned copper wire conductor (1), ethylene-propylene insulation rubber insulating layer (2) are provided with chlorosulfonated polyethylene restrictive coating or polyurethane elastomer restrictive coating (3) outward, chlorosulfonated polyethylene restrictive coating or polyurethane elastomer restrictive coating (3) are provided with polyurethane elastomer protective layer (4) outward. The utility model provides a rational in infrastructure, the insulating chlorosulfonated polyethylene sheath polyurethane protective layer demagnetization cable of EP that possesses good comprehensive properties.
Description
Technical Field
The utility model relates to an insulating chlorosulfonated polyethylene sheath polyurethane protective layer demagnetization cable of EP (ethylene propylene), belongs to cable technical field.
Background
The ship is made of magnetic materials, can be magnetized and has unique magnetic characteristics. Compared with a water pressure field and a sound field generated by sailing of a ship on the sea, the magnetic field of the ship is easier to capture and distinguish. In order to protect ships from being attacked by enemy magnetic weapons, prevent aviation magnetic detection and improve the concealment of the ships, military experts of various countries develop research on the magnetic field of the ships and adopt various protection measures, and the ship degaussing technology is developed at the end of life.
Demagnetization is a military engineering technology which utilizes a demagnetization principle and a non-hysteresis magnetization principle to reduce the magnetism of ships to the minimum. The demagnetizing cable is used for constructing a temporary coil around the ship for demagnetizing, the demagnetizing cable is used for constructing a temporary magnetic field at the periphery of the demagnetized ship, and a demagnetizing current meeting the demagnetizing requirement is passed through the coil to generate a magnetic field necessary for demagnetizing, so that the ship is demagnetized.
At present, the whole domestic and foreign demagnetization technology is along with the original Soviet Union technology, the demagnetization cables are all cables with the performance similar to that of the original Soviet Union technology, the cables are thick and heavy, the cables are not easy to lay, and the working strength of workers is high; the cold-shrink sleeve is adopted to manufacture the joint, so that the water tightness is poor, the conductor is easy to feed water, and the service life of the cable is shortened; these current situations have not been able to satisfy the use requirements of lighter, thinner and more wear-resistant degaussing cables and the purpose of reducing labor intensity.
SUMMERY OF THE UTILITY MODEL
To the above defect, the utility model aims to provide a rational in infrastructure, the insulating chlorosulfonated polyethylene sheath polyurethane protective layer demagnetization cable of EP that possesses good comprehensive properties.
Therefore, the utility model adopts the technical scheme that: the utility model discloses a tinned copper wire conductor (1), tinned copper wire conductor (1) is provided with EP rubbers insulating layer (2) outward, EP rubbers insulating layer (2) are provided with chlorosulfonated polyethylene restrictive coating or polyurethane elastomer restrictive coating (3) outward, chlorosulfonated polyethylene restrictive coating or polyurethane elastomer restrictive coating (3) are provided with polyurethane elastomer protective layer (4) outward.
The tinned copper wire conductor (1) is formed by stranding a plurality of strands of soft filaments, and the thin filaments are adopted during stranding, so that the pitch-diameter ratio is controlled within 12 times.
For the conductor section at 185mm2The following tin-plated copper wires with the monofilament diameter not more than 0.31mm are adopted, and the cross section of the conductor is 185mm2And the tin-plated copper wire with the monofilament diameter not more than 0.41mm is adopted; the regular twisting mode of 1+6+12+18+24 is adopted during twisting.
The joints of the cables are connected through silver-plated brass terminals through bolts.
The utility model has the advantages that: 1) The conductive wire core adopts the syntropy strand, twists repeatedly, and 1+6+12+18+24 regular transposition structure, and the multiple ratio of twist pitch is controlled within 12 times again, improves sinle silk compliance and resistant bending ability, and the external diameter is littleer.
2) The insulation adopts a novel rubber material with low density, low dielectric loss and high electrical property, and the dielectric loss tangent angle tan delta of the rubber is less than or equal to 0.002, so that the electrical insulation property of the cable is improved, the insulation thickness can be reduced, and the purposes of reducing the weight of the cable and reducing the outer diameter of the cable are achieved.
3) The sheath adopts the super soft sheath material of high wear-resisting, tear resistance is good, high resistant crooked, rubber material performance: the tensile strength is more than or equal to 13.0 MPa, the elongation at break is more than or equal to 400 percent, and the tear strength is more than or equal to 10.0N/mm; under the condition of meeting the use requirement of the cable, the service life of the cable is further prolonged.
4) The protective layer adopts high tear resistance, high strength, high abrasion's polyurethane elastomer material, and material properties: the tensile strength is more than or equal to 28.0 MPa, the elongation at break is more than or equal to 500 percent, the tear strength is more than or equal to 26.0N/mm, and the elongation at break is more than or equal to 100 percent in a low-temperature tensile test at-50 ℃; the requirement of the temperature of the use environment of the cable is met, and the safety of the cable in the use process is also ensured.
5) The novel demagnetization cable safety type joint is connected with a silver-plated brass wiring terminal through a mechanical bolt, the mechanical strength reaches 300MPa, and the resistivity is (20 ℃): 0.0178 omega mm2Per m (conductivity: 97% IACS), measured 1X 240mm2The pull-out force of the cable joint reaches 4469 kg.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1 is a tinned copper wire conductor, 2 is an ethylene propylene insulating rubber insulating layer, 3 is a chlorosulfonated polyethylene sheath layer or a polyurethane elastomer sheath layer, and 4 is a polyurethane elastomer protective layer.
Detailed Description
The utility model discloses a tinned copper wire conductor 1, tinned copper wire conductor 1 sets up EP rubbers insulating rubber insulating layer 2 outward, EP rubbers insulating rubber insulating layer 2 is provided with chlorosulfonated polyethylene restrictive coating or polyurethane elastomer restrictive coating 3 outward, chlorosulfonated polyethylene restrictive coating or polyurethane elastomer restrictive coating 3 are provided with polyurethane elastomer protective layer 4 outward.
The tinned copper wire conductor 1 is formed by stranding a plurality of strands of soft filaments, and the thin filaments are adopted during stranding, so that the pitch-diameter ratio is controlled within 12 times.
For the conductor section at 185mm2The following tin-plated copper wires with the monofilament diameter not more than 0.31mm are adopted, and the cross section of the conductor is 185mm2And the tin-plated copper wire with the monofilament diameter not more than 0.41mm is adopted; the regular twisting mode of 1+6+12+18+24 is adopted during twisting.
The joints of the cables are connected through silver-plated brass terminals through bolts.
The following further explanation of the present invention is made:
1, selecting conductor materials:
in order to ensure that the cable can bear higher instantaneous impact current, effectively improve the current-carrying capacity of the cable and reduce the voltage drop of the cable, a high-quality tin-plated copper wire material is selected, the purity of oxygen-free copper reaches 99.99 percent, the conductivity is good, and the current-carrying capacity of the conductive wire core can be effectively improved; the uniformity and firmness of the tin coating are ensured, and the oxidation resistance of the conductor is ensured; the cable conductor is formed by stranding a plurality of strands of soft filaments specified in GJB1916, the small pitch-diameter ratio of the filaments is adopted during stranding, and the pitch-diameter ratio is controlled within 12 times, so that the conductor is more flexible and easy to bend, the cable is convenient to frequently bend and move during laying and using, and the requirement of the bending radius of the cable is met.
2, selection of insulating materials:
on the premise of ensuring the mechanical performance of the insulation, in order to reduce the dielectric loss of the cable insulation material and improve the temperature-resistant grade of the insulation, the ethylene-propylene insulation rubber with light specific gravity and small dielectric loss is selected; through tests, the dielectric loss tangent value of the insulating material is reduced by more than half compared with that of a common material, the dielectric loss of the insulating layer is greatly reduced, and the current-carrying capacity of the cable is improved.
3, selecting a sheath material:
because the cable part is used in seawater and is manually wound and laid, the sheath material is required to be soft, bending resistant, wear resistant, oil resistant, mould proof, seawater corrosion resistant and tearing resistant, and does not absorb moisture. By comprehensive consideration, the chlorosulfonated polyethylene or polyurethane elastomer material with high temperature resistance grade, softness, bending resistance, oil resistance, wear resistance, mildew resistance, strong corrosion resistance and good tearing resistance is determined to be adopted as the sheath.
4, selecting a protective layer material:
because the cable is used by being soaked in seawater for a long time, the laying environment is in seawater at minus 25 ℃ to plus 55 ℃, and the cable can be damaged by marine organisms, the protective layer material is required to have the performances of high strength, high tearing resistance, high wear resistance, stronger seawater corrosion resistance, seawater organism bite resistance, no moisture absorption and the like. According to the past use experience and test verification, the polyurethane elastomer material with good low-temperature resistance, seawater resistance, oil stain resistance, salt mist resistance, mould resistance, tearing resistance and wear resistance is determined to be adopted through comprehensive consideration.
5, manufacturing a copper connector at a cable terminal:
the cable terminal copper joint is manufactured by tin filling, pouring and crimping processes, the surface of a crimped semi-finished product is free of cracks and oil stains, a conductor is free of wire breakage, the connection is firm, a rubber hot-pressing die which is independently developed is adopted for repairing the joint, a new process of die pressing the joint is manufactured, glue is adopted for coating and then repairing the joint, the rubber and the copper material at the joint are completely adhered, a test of certain water pressure can be borne, and the inside of the joint is completely permeated without water.
1, stranding a conductive wire core:
the flexibility and bending resistance of the cable are mainly determined by the structure of the cable, in which the structure of the conductive core plays a crucial role. In order to make the conductive wire core soft and flexible, the conductor is designed into a structure of thin monofilaments, bunches and composite strands. A special stranding method is adopted according to a special use mode of the degaussing cable, the diameter of a single wire is adjusted, and for the degaussing cable DSEHR for laying the temporary coil, a tinned copper wire with the diameter of the single wire being not more than 0.31mm is adopted; while the demagnetization cables DSEHR-U and DYJF types for laying fixed coils are 185mm in conductor section2The following tin-plated copper wires with the monofilament diameter not more than 0.31mm are adopted, and the cross section of the conductor is 185mm2And the tin-plated copper wire with the monofilament diameter not more than 0.41mm is adopted; all adopt the regular transposition mode of 1+6+12+18+24 during the hank system, make the conductor structure more stable, inseparable degree is high, and the external diameter is little, and the electric wire core compliance is good.
The utility model discloses possess following performance:
1 cable working voltage: 1000V, the long-term allowable working temperature of the cable conductor is as follows: at 90 ℃. The conductor when the cable is short-circuited (duration not exceeding 5 seconds) allows a maximum temperature of 250 ℃.
2, laying environment: the water depth is less than or equal to 25 m in the seawater at the temperature of minus 25 ℃ to plus 55 ℃. The cable has the performances of seawater resistance, moisture resistance, salt mist resistance, oil stain resistance, mould resistance and the like.
3 minimum bending radius during cable laying: 4 times the outer diameter of the cable.
4, voltage test: the cable is subjected to power frequency alternating current of 3.5kV for 5min, and the cable is not broken down.
Conductor direct current resistance at 520 ℃:
70 mm2≤0.271Ω/km
185 mm2≤0.106 Ω/km；
240 mm2≤0.080Ω/km。
insulation resistance at 20 ℃:
70 mm2≥345 MΩ·km
185 mm2≥293 MΩ·km
240 mm2≥272 MΩ·km。
6 Hot oil aging test (in ASTM # 2 oil, 100 ℃ C.. times.24 h):
the tensile strength and elongation at break change rate of chlorosulfonated polyethylene is less than or equal to +/-40%.
The change rate of the tensile strength and the elongation at break of the polyurethane is less than or equal to +/-40 percent.
7 single cable flame retardant test: meets the requirement of GB/T18380.12.
9 cable bending test: meets the requirement of GJB1916.12, and bends 6000 times at 20 deg.C.
10 transverse water tightness test of the finished cable: the test pressure is 3.0MPa, lasts for 2h, and the cable end does not drip in the test process.
11, long-term seawater immersion test of the finished cable:
the insulation resistance is not less than 100 MOmega.km after the seawater is soaked for 40 days at the temperature of 40 ℃; the withstand voltage test should withstand power frequency 2.5kV, last 5min, the insulation does not puncture.
12, magnetic test of the finished cable: after the finished cable with the length of 20cm is magnetized by an 8mT magnetic field, the magnetic change at a position 5cm away from the sample is less than 5nT.
13 mould test: according to the requirement of GJB150A.10, the degree of mildew growth is less than or equal to grade 2 under the conditions of 30 +/-1 ℃ and 95% +/-5% relative humidity.
14 salt spray test: according to the requirements of GJB150A.11, at 35 ℃, the salt content is 5 percent, the pH value is 6.5-7.2, and the settling volume of salt spray (1.0-2.0) ml/80cm216h and 336h of test time, and all the performances of the product meet the requirements.
15 cable joint pull-off force test: the maximum pulling-out force borne by the cable joint is greater than or equal to the following regulation:
70 mm2≥1500kg
185 mm2≥1500kg
240 mm2≥1800kg。
Claims (4)
1. the ethylene-propylene insulating chlorosulfonated polyethylene sheath polyurethane protective layer demagnetizing cable is characterized by comprising a tinned copper wire conductor (1), an ethylene-propylene insulating rubber insulating layer (2) is arranged outside the tinned copper wire conductor (1), a chlorosulfonated polyethylene sheath layer or a polyurethane elastomer sheath layer (3) is arranged outside the ethylene-propylene insulating rubber insulating layer (2), and a polyurethane elastomer protective layer (4) is arranged outside the chlorosulfonated polyethylene sheath layer or the polyurethane elastomer sheath layer (3).
2. The ethylene-propylene insulating chlorosulfonated polyethylene sheathed polyurethane protective layer demagnetizing cable according to claim 1, wherein the tinned copper wire conductor (1) is formed by stranding a plurality of soft filaments, and the filaments are adopted during stranding with a small pitch-diameter ratio, and the pitch-diameter ratio is controlled within 12 times.
3. According to the rightThe ethylene-propylene insulating chlorosulfonated polyethylene sheathed polyurethane protective layer demagnetizing cable of claim 1, wherein the cross section of the conductor is 185mm2The following tin-plated copper wires with the monofilament diameter not more than 0.31mm are adopted, and the cross section of the conductor is 185mm2And the tin-plated copper wire with the monofilament diameter not more than 0.41mm is adopted; the regular twisting mode of 1+6+12+18+24 is adopted during twisting.
4. The ethylene-propylene insulating chlorosulfonated polyethylene sheathed polyurethane protective layer demagnetizing cable according to claim 1, wherein joints of the cable are connected by silver-plated brass terminals through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822266045.XU CN210200330U (en) | 2018-12-31 | 2018-12-31 | Ethylene-propylene insulating chlorosulfonated polyethylene sheath polyurethane protective layer degaussing cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822266045.XU CN210200330U (en) | 2018-12-31 | 2018-12-31 | Ethylene-propylene insulating chlorosulfonated polyethylene sheath polyurethane protective layer degaussing cable |
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| Publication Number | Publication Date |
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| CN210200330U true CN210200330U (en) | 2020-03-27 |
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| CN201822266045.XU Active CN210200330U (en) | 2018-12-31 | 2018-12-31 | Ethylene-propylene insulating chlorosulfonated polyethylene sheath polyurethane protective layer degaussing cable |
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| CN (1) | CN210200330U (en) |
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