CN214336405U - Plastic insulation communication cable suitable for slurry environment - Google Patents
Plastic insulation communication cable suitable for slurry environment Download PDFInfo
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- CN214336405U CN214336405U CN202120379380.XU CN202120379380U CN214336405U CN 214336405 U CN214336405 U CN 214336405U CN 202120379380 U CN202120379380 U CN 202120379380U CN 214336405 U CN214336405 U CN 214336405U
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Abstract
The utility model provides a plastic insulation communication cable suitable for mud environment, its structure is: a cable core is formed by a plurality of groups of wire pairs and filling and twisting, and a fourth wrapping layer, an inner sheath, a metal braid layer and an outer sheath are sequentially wrapped outside the cable core; any group of wire pairs is formed by twisting two wire cores and then wrapping a composite wrapping layer; any wire core is formed by sequentially wrapping a first wrapping layer and a wire core insulating layer outside a wire core conductor; the conductor of the wire core is a marine 2 nd conductor, and the conductor is a tinned conductor; the wrapping tape of the first wrapping layer is a two-layer double-sided synthetic white mica tape; the wrapping tape of the fourth wrapping layer is a low-smoke halogen-free flame-retardant inner sheath which is made of oil-resistant low-smoke halogen-free flame-retardant cable irradiation sheath material; the metal braid is formed by weaving tinned copper wires; the outer sheath is made of oil-resistant low-smoke halogen-free flame-retardant cable irradiation sheath material. The cable has good mud resistance, corrosion resistance, impact resistance and other performances, can still effectively transmit information under a long-term mud environment, realizes a communication function, and is safe to use.
Description
Technical Field
This technical scheme belongs to cable technical field, is specifically the plastic insulation communication cable who is applicable to the mud environment.
Background
With the development of economy and technology, the sea traffic is more mature, and the requirements on the sea cable are higher. On the seabed, the communication cable needs to have better structural performance than a common cable, and simultaneously has good performances of mud resistance, corrosion resistance, impact resistance and the like, and can still effectively transmit information under a long-term mud environment, thereby realizing the communication function and being safe to use.
The cable is in a slurry-resistant environment for a long time, and is easy to be immersed in moisture, damage insulation, reduce performance and cause irreparable loss; the cable is easy to corrode, and the shielding signal is weak; in consideration of natural disasters such as ocean currents, the cable is extremely easy to collide with rocks. Therefore, the cable has the characteristics of strong slurry resistance, strong corrosion resistance, strong signal, high strength and the like. Only cables with the advantages of high strength, slurry resistance, corrosion resistance (seawater corrosion), impact resistance (collision of rocks caused by ocean currents and the like), good shielding (communication requirements) and the like can be used as communication cables in development and utilization in the offshore energy field.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a plastic insulation communication cable suitable for mud environment, its structure is: a cable core is formed by a plurality of groups of wire pairs and filling and twisting, and a fourth wrapping layer, an inner sheath, a metal braid layer and an outer sheath are sequentially wrapped outside the cable core;
any group of wire pairs is formed by twisting two wire cores and then wrapping a composite wrapping layer; any wire core is formed by sequentially wrapping a first wrapping layer and a wire core insulating layer outside a wire core conductor;
the core conductor is a marine 2 nd conductor, and the conductor is a tinned conductor; the wrapping tape of the first wrapping layer is two layers of double-sided synthetic white mica tapes (the first layer of double-sided mica tape is wrapped firstly, and then the second layer of double-sided mica tape is wrapped after the wrapping is finished);
the wrapping tape of the fourth wrapping layer is a low-smoke halogen-free flame-retardant tape;
the inner sheath is made of oil-resistant low-smoke halogen-free flame-retardant cable irradiation sheath material;
the metal braid is formed by weaving tinned copper wires;
the outer sheath is made of oil-resistant low-smoke halogen-free flame-retardant cable irradiation sheath material.
Furthermore, the average overlapping rate of the wrapping tapes of the first wrapping layer is not less than 25%, and the wrapping direction of the first wrapping layer is opposite to the twisting direction of the core conductor; the core insulation layer is made of crosslinked polyethylene insulation material, the average thickness of the core insulation layer is 0.60-0.69 mm, the thickness of the thinnest part is not less than 0.38mm, and the eccentricity is not more than 25%;
the wire core pair twisting direction in the wire pair is left direction, and the twisting pitch is not more than 150 mm.
Further, the composite wrapping layer sequentially comprises a second wrapping layer, a metal shielding layer and a third wrapping layer from inside to outside;
the second is around covering (polyester area) and prevents that the shielding layer scratch is insulating, and metal shielding layer (copper plastic composite belt) plays the effect of shielding external interference signal, and the third is around covering (polyester area) and divides screen insulation resistance.
The wrapping tape of the second wrapping layer is a polyester tape, and the average overlapping rate is not less than 25%;
the metal shielding layer is formed by wrapping a copper-plastic composite tape, and the copper surface of the copper-plastic composite tape faces inwards; the average overlap of the copper-plastic composite tape was 25%. The width and the thickness of the copper-plastic composite belt are 35mm and 0.05mm respectively.
Longitudinally placing a class 5 tinned copper wire as a drainage wire on the inner side when the metal shielding layer is wrapped, wherein the drainage wire is in contact with the copper surface;
the wrapping tape of the third wrapping layer is a polyester tape, and the average overlapping rate is not less than 25%.
Further, the filling is a PP rope.
Further, the average overlapping rate of the wrapping tapes of the fourth wrapping layer is not less than 25%;
the average thickness of the inner sheath is not more than 1.61mm, and the thickness of the thinnest part is not less than 0.92 mm;
the weaving density of the metal braid is not less than 80% (preferably not less than 81.8%); the diameter range of the tinned copper wire of the metal braid is 0.15 mm-0.25 mm.
The average thickness of the outer sheath is not more than 1.27mm, and the thickness of the thinnest part is not less than 0.68 mm.
The inner sheath is used for protecting the insulation and the lower (inner) layer structure from being damaged; the outer sheath is used for protecting the cable, preventing collision and resisting slurry.
Adopt two-layer sheath to press from both sides one deck metal braid structure and be used for satisfying Norwegian NEK606 standard requirement
The design of the cable meets the requirement of Norwegian NEK606 standard, the standard requires that the sheath material is made of a drilling fluid resistant SHF MUD material, the change rate of the tensile strength and the elongation at break relative to the number of an aged sample is not more than 30%, and the volume expansion rate and the weight increase are not more than 30%. The thermosetting sheathed cable can adapt to petroleum production equipment, and the oil resistance can meet the requirements of SHF2 in IEC 60092-360. The cable comprehensively considers the requirements of oil resistance and slurry resistance and meets the standard requirements.
The utility model discloses the design of cable can reach the cable and have good resistant performances such as mud, corrosion-resistant and resistant striking after structural optimization, material optimization etc. under long-term mud environment, still can effectual transmission information, realize communication function, safe in utilization.
Drawings
FIG. 1 is a schematic radial cross-sectional view of the cable of this example;
in the figure: sinle silk conductor 1, first wind covering 2, sinle silk insulating layer 3, compound around covering 4 (the second is around covering, metallic shield, third around the covering), fill 5, inner sheath 6, metallic braid 7, oversheath 8, fourth around covering 9.
Detailed Description
The technical solution is further explained below with reference to specific embodiments as follows:
referring to fig. 1, a plastic insulated communication cable suitable for use in a slurry environment has a structure of: a cable core is formed by twisting a plurality of groups of wire pairs (7 groups of wire pairs in the example) and the filler 5, and a fourth wrapping layer 9, an inner sheath 6, a metal braid 7 and an outer sheath 8 are sequentially wrapped outside the cable core;
any group of wire pairs is formed by twisting two wire cores and wrapping a composite wrapping layer 4; any wire core is formed by sequentially wrapping a first wrapping layer 2 and a wire core insulating layer 3 outside a wire core conductor 1;
the core conductor 1 is a marine 2 nd conductor, and the conductor is a tinned conductor; the wrapping tape of the first wrapping layer 2 is a two-layer double-sided synthetic white mica tape;
the wrapping tape of the fourth wrapping layer 9 is a low-smoke halogen-free flame-retardant tape;
the inner sheath 6 is made of oil-resistant low-smoke halogen-free flame-retardant cable irradiation sheath material;
the metal braid 7 is formed by weaving tinned copper wires;
the outer sheath 8 is made of oil-resistant low-smoke halogen-free flame-retardant cable irradiation sheath material;
in the present example:
the average overlapping rate of the wrapping tapes of the first wrapping layer is not less than 25%, and the wrapping direction of the first wrapping layer is opposite to the twisting direction of the core conductor; the core insulation layer is made of crosslinked polyethylene insulation material, the average thickness of the core insulation layer is 0.60-0.69 mm, the thickness of the thinnest part is not less than 0.38mm, and the eccentricity is not more than 25%;
the wire core pair twisting direction in the wire pair is left direction, and the twisting pitch is not more than 150 mm.
Further, the composite wrapping layer sequentially comprises a second wrapping layer, a metal shielding layer and a third wrapping layer from inside to outside;
the wrapping tape of the second wrapping layer is a polyester tape, and the average overlapping rate is not less than 25%;
the metal shielding layer is formed by wrapping a copper-plastic composite tape, and the copper surface of the copper-plastic composite tape faces inwards; the average overlapping rate of the copper-plastic composite belt is 25%, and the width and the thickness of the copper-plastic composite belt are 35mm and 0.05mm respectively.
Longitudinally placing a class 5 tinned copper wire as a drainage wire on the inner side when the metal shielding layer is wrapped, wherein the drainage wire is in contact with the copper surface;
the wrapping tape of the third wrapping layer is a polyester tape, and the average overlapping rate is not less than 25%.
The filling is a PP rope. The average overlapping rate of the wrapping tapes of the fourth wrapping layer is not less than 25%; the average thickness of the inner sheath is not more than 1.61mm, and the thickness of the thinnest part is not less than 0.92 mm; the weaving density of the metal braid is not less than 80% (preferably not less than 81.8%); the diameter range of the tinned copper wire of the metal braid is 0.15-0.25 mm. The average thickness of the outer sheath is not more than 1.27mm, and the thickness of the thinnest part is not less than 0.68 mm.
During production, the optional type/brand of sheathing material of the inner sheath is FEW923, and the optional type/brand of sheathing material of the outer sheath is FEW 925.
In this cable structure, in order to reach technical effect such as high strength, resistant mud, corrosion-resistant, resistant striking, shielding good, adopt corresponding technological means respectively to realize, wherein:
the excellent tensile strength and elongation at break of the cable fully realize high strength: the outer sheath is made of thermosetting slurry-resistant sheath material to realize slurry resistance and corrosion resistance; a double-layer sheath is adopted to realize impact resistance; the copper-plastic composite belt is adopted for shielding, the average overlapping rate is 25 percent (equivalent to the coverage rate of 100 percent), and the copper-plastic composite belt can still have good signal transmission capability under the condition that a large interference signal exists in the outside, thereby achieving the purpose of good shielding.
The design difficulty of the cable mainly lies in the sheath material and the metal shield. The quality of the sheath material greatly determines the mud resistance and oil resistance; the quality of the metal shield determines the quality of the cable shield and the smoothness of signal transmission to a great extent. Through specific sheath structure and shielding structure, on the premise of satisfying general function, the performance of cable, have excellent resistant mud and resistant oily ability and shielding performance.
After detection, the performance parameters of the cable of the embodiment are as follows:
the resistance of the conductor at 1.20 ℃ is not more than 12.2 omega/km, the resistance of the drainage wire at 20 ℃ is not more than 28.3 omega/km, and the insulation resistance at 20 ℃ is not less than 949M omega/km;
2. the maximum elongation under the insulation heat extension load is not less than 175 percent, and the permanent elongation after cooling is not less than 15 percent;
3. the maximum elongation of the sheath under the hot extension load is not less than 175 percent, and the permanent elongation after cooling is not less than 25 percent;
after soaking IRM902# oil at 4.100 ℃ for 168h and aging, the change rate of tensile strength is not more than 40%, the change rate of elongation at break is not more than 40%, and the change rate of linear expansion is not more than 15%; (oil resistance, tensile, elongation at break may reflect strength);
5.100 ℃, after aging by soaking IRM903# oil for 168 hours, the change rate of tensile strength is not more than 30%, the change rate of elongation at break is not more than 30%, the change rate of volume expansion is not more than 30%, and the change rate of weight change is not more than 30%; (oil resistance, tensile may react strength);
after being aged in 56d calcium bromide-soaked brine (water base) at the temperature of 6.70 ℃, the change rate of the tensile strength is not more than 25 percent, the change rate of the elongation at break is not more than 25 percent, the change rate of the volume expansion is not more than 20 percent, and the change rate of the weight is not more than 15 percent (mud resistance);
at 7.70 ℃, after being aged by 56d soaking in Carbeo Sea (oil base), the change rate of tensile strength is not more than 25 percent, the change rate of elongation at break is not more than 25 percent, the change rate of volume expansion is not more than 20 percent, and the change rate of weight change is not more than 15 percent (oil resistance, tensile strength can reflect strength).
Claims (6)
1. The utility model provides a plastic insulation communication cable suitable for mud environment, its characterized in that structure is: a cable core is formed by a plurality of groups of wire pairs and filling and twisting, and a fourth wrapping layer, an inner sheath, a metal braid layer and an outer sheath are sequentially wrapped outside the cable core;
any group of wire pairs is formed by twisting two wire cores and then wrapping a composite wrapping layer; any wire core is formed by sequentially wrapping a first wrapping layer and a wire core insulating layer outside a wire core conductor;
the core conductor is a marine 2 nd conductor, and the conductor is a tinned conductor; the wrapping tape of the first wrapping layer is a two-layer double-sided synthetic white mica tape;
the wrapping tape of the fourth wrapping layer is a low-smoke halogen-free flame-retardant tape;
the inner sheath is made of oil-resistant low-smoke halogen-free flame-retardant cable irradiation sheath material;
the metal braid is formed by weaving tinned copper wires;
the outer sheath is made of oil-resistant low-smoke halogen-free flame-retardant cable irradiation sheath material.
2. The plastic-insulated communications cable suitable for use in a slurry environment of claim 1, wherein said first layer has a tape average overlap of no less than 25%, the first layer having a lay direction opposite to the lay direction of the core conductor; the core insulation layer is made of crosslinked polyethylene insulation material, the average thickness of the core insulation layer is 0.60-0.69 mm, the thickness of the thinnest part is not less than 0.38mm, and the eccentricity is not more than 25%;
the wire core pair twisting direction in the wire pair is left direction, and the twisting pitch is not more than 150 mm.
3. The plastic insulated communication cable suitable for the mud environment according to claim 1, wherein the composite wrapping layer comprises a second wrapping layer, a metal shielding layer and a third wrapping layer from inside to outside;
the wrapping tape of the second wrapping layer is a polyester tape, and the average overlapping rate is not less than 25%;
the metal shielding layer is formed by wrapping a copper-plastic composite tape, and the copper surface of the copper-plastic composite tape faces inwards; the average overlapping rate of the copper-plastic composite belt is 25 percent; the width of the copper-plastic composite belt is 35mm, and the thickness of the copper-plastic composite belt is 0.05 mm;
longitudinally placing a class 5 tinned copper wire as a drainage wire on the inner side when the metal shielding layer is wrapped, wherein the drainage wire is in contact with the copper surface;
the wrapping tape of the third wrapping layer is a polyester tape, and the average overlapping rate is not less than 25%.
4. The plastic insulated communications cable adapted for use in a slurry environment of claim 1, wherein said filler is PP cords.
5. The plastic-insulated communications cable suitable for use in a slurry environment of claim 1, wherein said fourth layer has an average overlap of tapes of no less than 25%;
the average thickness of the inner sheath is not more than 1.61mm, and the thickness of the thinnest part is not less than 0.92 mm;
the weaving density of the metal weaving layer is not less than 80%; the wire diameter range of the tinned copper wire of the metal braid is 0.15 mm-0.25 mm;
the average thickness of the outer sheath is not more than 1.27mm, and the thickness of the thinnest part is not less than 0.68 mm.
6. The plastic-insulated communications cable adapted for use in a mud environment of claim 5, wherein said metal braid has a braid density of not less than 81.8%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120379380.XU CN214336405U (en) | 2021-02-20 | 2021-02-20 | Plastic insulation communication cable suitable for slurry environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120379380.XU CN214336405U (en) | 2021-02-20 | 2021-02-20 | Plastic insulation communication cable suitable for slurry environment |
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| CN214336405U true CN214336405U (en) | 2021-10-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116487119A (en) * | 2023-04-08 | 2023-07-25 | 山东中船线缆股份有限公司 | Safe fire-proof cable for port returning and manufacturing method thereof |
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2021
- 2021-02-20 CN CN202120379380.XU patent/CN214336405U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116487119A (en) * | 2023-04-08 | 2023-07-25 | 山东中船线缆股份有限公司 | Safe fire-proof cable for port returning and manufacturing method thereof |
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