CN214796843U - Long-life low temperature resistant nuclear power station gentle environmental non-1E level power cable - Google Patents
Long-life low temperature resistant nuclear power station gentle environmental non-1E level power cable Download PDFInfo
- Publication number
- CN214796843U CN214796843U CN202120638114.4U CN202120638114U CN214796843U CN 214796843 U CN214796843 U CN 214796843U CN 202120638114 U CN202120638114 U CN 202120638114U CN 214796843 U CN214796843 U CN 214796843U
- Authority
- CN
- China
- Prior art keywords
- cable
- low
- thickness
- retardant
- long
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Insulated Conductors (AREA)
Abstract
The utility model provides a gentle for environment non-1E level power cable of low temperature-resistant nuclear power station of long-life, the structure of cable is: the cable is formed by sequentially wrapping a wrapping layer, an inner sheath and an outer sheath outside a cable core; the cable core is formed by twisting the cable core and the rock wool rope together in the right direction; the wire core is formed by extruding an insulating layer outside a conductor; the conductor is formed by stranding tin-plated copper monofilaments in multiple layers from inside to outside; the insulating layer is made of radiation-resistant low-smoke halogen-free flame-retardant crosslinked polyethylene insulating material; the wrapping layer is formed by wrapping a low-smoke halogen-free high-flame-retardant cloth tape in the left direction; the inner sheath is made of a low-smoke halogen-free flame-retardant oxygen-isolating layer sheath material; the outer sheath is made of a long-life thermoplastic low-smoke halogen-free flame-retardant polyolefin sheath material. The cable has the characteristics that: the material has the advantages of nuclear radiation resistance, good flame retardant property, long service life, low temperature resistance and good economy.
Description
Technical Field
The utility model relates to a power cable, especially a power cable suitable for rated voltage 0.6/1kV belongs to cable technical field.
Background
In the power cables used in the BOP and conventional island regions in the gentle environment of the nuclear power station, if the power cables have long service life or other harsh environment requirements, the nuclear-grade cables need to be degraded for use instead, so that the purchasing cost is increased, and the resource waste is also caused.
Although the cable is a nuclear power plant and gentle in environment, the cable also needs to meet the requirements of operation under the condition of nuclear radiation, and the performances of radiation resistance, low temperature resistance, service life, flame retardance and the like of the cable are higher than those of a common cable. How to meet special use requirements under the economic condition is a problem to be solved.
SUMMERY OF THE UTILITY MODEL
The actual requirement condition to the gentle environment cable of nuclear power station, the utility model discloses power cable forces on in cable structure's improvement, increases the life of cable to can be suitable for the alternative use under the low temperature environment.
Aiming at the laying problem in the low-temperature environment, the low-temperature-resistant cable is low-temperature-resistant, the bending radius is 8 times of the radius of the cable, and the moving laying capacity is enhanced.
In order to ensure that the cable can still normally work under the nuclear radiation of a gentle environment, the insulating layer and the outer protective layer are required to have the radiation resistance;
in order to prevent the spread of fire, the composition structure of the cable is required to have low-smoke halogen-free flame retardant performance;
to avoid frequent replacement of the cable, the service life of the cable needs to be increased.
In order to avoid resource waste, a simple cable structure and a simple process need to be designed.
The technical scheme adopted for solving the technical problems is as follows:
in order to achieve the technical purpose, the utility model adopts the following technical scheme:
a gentle environment uses the long-lived low temperature resistant power cable of non-1E level, its structure is formed by cable core, around covering inner sheath and oversheath;
the cable core is formed by twisting 2-5 cable cores and a plurality of rock wool ropes;
the wire core is formed by wrapping an insulating layer outside a conductor; the cross-sectional area of the conductor is 1.5mm2～300mm2(ii) a The conductor is formed by stranding tinned copper monofilaments in multiple layers from inside to outside, the diameter range of the tinned copper monofilaments is 0.52-2.60 mm, the diameter range of the conductor is 1.7-21.0mm, the stranding pitch-diameter ratio range of the tinned copper monofilaments on the innermost layer of the conductor is 20-40, the stranding pitch-diameter ratio range of the tinned copper monofilaments on the outermost layer of the conductor is 12-20, the stranding direction of the tinned copper monofilaments on the outermost layer is in the left direction, and the stranding directions of the tinned copper monofilaments on the adjacent layers are opposite; the insulating layer is made of radiation-resistant low-smoke halogen-free flame-retardant crosslinked polyethylene insulating material (the optional brand is FPW 162-1); the thickness of the insulating layer is 0.53-1.9 mm.
The insulating layer adopts single-layer insulation extrusion, and compared with double-layer extrusion of a 1E-level cable, the structure greatly reduces the control difficulty of the production process and is easier to introduce into production.
The cable core and the rock wool rope are of a common right-hand twisting structure, the twisting pitch-diameter ratio range is 35-40, and relatively large twisting pitch is adopted, so that the production efficiency can be relatively improved, and the flexibility of the cable core is improved.
The rock wool rope is non-hygroscopic rock wool material; the composite multi-strand low-smoke halogen-free flame-retardant filling rope is filled into the gaps between the center and the side of the cable core with 2-5 cores, so that the roundness of the cable is improved, and the flame retardant property of the cable is improved.
The wrapping layer is formed by wrapping a low-smoke halogen-free high-flame-retardant cloth tape in the left direction; the thickness range of the low-smoke halogen-free high-flame-retardant cloth belt is 0.18-0.22 mm; the width is 15 mm-40 mm. The selection specification and the cover overlapping rate of the halogen-free tape are verified to effectively ensure the tightness of the wrapping layer, reduce the waste of materials and improve the production efficiency.
The inner sheath is made of a low-smoke halogen-free flame-retardant oxygen-insulating layer material (the selectable brand is HW 495-2); the nominal thickness is 1.0-1.8 mm, and the thickness of the thinnest part is not less than 80-0.2 mm of the nominal value. The inner sheath structure can adopt the extruded tube type production, can reduce the production degree of difficulty, improves production speed, and is relatively easy to the control of size.
The outer sheath is made of a long-life thermoplastic low-smoke halogen-free flame-retardant polyolefin material (the selectable brand is HW 4690-H); the nominal thickness of the outer protective layer is 1.8-3.5 mm, and the thickness of the thinnest part is not less than 80-0.2 mm of the nominal value. The outer sheath is produced in an extruded tube mode, the thickness of the outer sheath is easier to control, the increase of the quantity of the outer sheath materials caused by the out-of-round cable core can be reduced, the production speed can be increased, and the economic benefit is improved.
The gentle environmental non-1E level long-life low temperature resistant power cable of this structure is under the basic requirement prerequisite such as satisfying cable electrical property, adopts stranded tinned copper wire stranded conductor, the fire-retardant resistant radiation of long-life low smoke and zero halogen cross-linked polyethylene of fire-retardant type low smoke and zero halogen of long-life low smoke and insulating, adopts non-hygroscopicity rock wool material transposition filling rope, resistant radiation thermoplasticity low smoke and zero halogen fire-retardant polyolefin sheath material etc.. On the premise of adopting the radiation-resistant and long-life insulating sheath material to improve the service life and the irradiation resistance of the cable, the low-smoke halogen-free high-flame-retardant cloth belt and the plurality of non-hygroscopic rock wool ropes are simultaneously used for filling to improve the flame retardant property of the cable with a simple structure.
Advantageous effects
After the technical scheme is adopted, the utility model discloses following beneficial effect has:
(1) the cable has reasonable structure.
(2) The stranded tin-plated copper conductor improves the conductivity of the conductor, makes the conductor more corrosion-resistant, and can reduce the generation of CuO and Cu by copper oxidation2O。
(3) The cable integrally meets the requirements of low-smoke halogen-free flame-retardant performance by using low-smoke halogen-free flame-retardant filling and sheath materials, and prevents fire from spreading due to the cable.
(4) The insulating and outer sheath is made of materials with radiation resistance and long service life, and the service life and the radiation resistance of the cable are improved by matching with the insulating and sheath structure.
(5) The cable core has increased the inner sheath structure of one deck outward for the overall structure of cable is more inseparable, further isolated and oxygen contact, reinforcing cold resistance.
The utility model discloses the cable has used high-quality material and specific structural parameter in order to reach the life of extension cable simultaneously on the basis of new design cable shape structure, has promoted the low temperature resistant ability of cable, and the cable can be used in the conventional island and the BOP region and the similar environment of the gentle environment of nuclear power station.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
in the figure: 1. a conductor; 2. an insulating layer; 3. rock wool rope; 4. wrapping a covering; 5. an inner sheath; 6. an outer sheath;
Detailed Description
The present invention is further described with reference to the following detailed description and accompanying drawings:
as shown in figure 1, a gentle for environment non-1E level power cable of gentle environment of low temperature-resistant nuclear power station of long-life, the external diameter scope of cable is 15 ~ 80mm, and the structure of cable is: the cable is formed by sequentially wrapping a wrapping layer 4, an inner sheath 5 and an outer sheath 6 outside a cable core;
the cable core is formed by twisting 2-5 cable cores (3 in the example) and a plurality of rock wool ropes 3 together in the right direction; the rock wool rope is respectively filled in the center of the cable core and the side clearance; the ratio of the twisted pitch to the diameter is 30-40 times; the rock wool rope is filled into the gap between the center and the side of the cable core, so that the roundness of the cable is improved, and the flame retardant property of the cable is improved.
The wire core is formed by extruding an insulating layer 2 outside a conductor 1;
the cross-sectional area of the conductor 1 is 1.5mm2～300mm2(ii) a The conductor is formed by stranding tinned copper monofilaments in multiple layers from inside to outside, the diameter range of the tinned copper monofilaments is 0.52-2.60 mm, the diameter range of the conductor is 1.7-21.0mm, the stranding pitch-diameter ratio range of the tinned copper monofilaments on the innermost layer of the conductor is 20-40, the stranding pitch-diameter ratio range of the tinned copper monofilaments on the outermost layer of the conductor is 12-20, the stranding direction of the tinned copper monofilaments on the outermost layer is in the left direction, and the stranding directions of the tinned copper monofilaments on the adjacent layers are opposite;
the insulation layer is made of an irradiation-resistant low-smoke halogen-free flame-retardant crosslinked polyethylene insulation material, and the thickness of the insulation layer is 0.53-1.9 mm;
the wrapping layer is formed by wrapping a low-smoke halogen-free high-flame-retardant cloth tape leftwards; the thickness range of the low-smoke halogen-free high-flame-retardant cloth belt is 0.18-0.22mm, and the width of the low-smoke halogen-free high-flame-retardant cloth belt is 15-40 mm;
the inner sheath is made of a low-smoke halogen-free flame-retardant oxygen-isolating layer sheath material, the thickness of the inner sheath is 1.0-1.8 mm, and the thickness of the thinnest part is not less than 80-0.2 mm of a nominal value;
the outer sheath is made of a long-life thermoplastic low-smoke halogen-free flame-retardant polyolefin sheath material, the nominal thickness of the outer sheath is 1.8-3.5 mm, and the thickness of the thinnest part is not less than 80-0.2 mm of the nominal value.
The nominal thickness of the insulating layer is 0.7-1.8 mm (1.5 mm)2～300mm2Nominal thickness is selected according to the specification of GB/T12706.1-2020), the thinnest point thickness is not less than 90-0.1 mm of the nominal value.
The rock wool rope is a dust-free rock wool rope consisting of a plurality of non-hygroscopic rock wool materials, and the diameter of a single dust-free rock wool rope is 1.8-8 mm.
With 3X 185(3 cores, conductor cross-sectional area of 185 mm)2) The specification cable is taken as an example, and when the structure is adopted:
the thickness of the insulating layer (the mark is FPE162-1) is 1.6 mm;
the outer diameter of the cable is 48 mm;
the stranding pitch diameter ratio of the cable core is 32 times;
the diameter of the tin-plated copper monofilament is 3.25mm, the stranding pitch ratio of the innermost layer is 33 times, and the stranding pitch ratio of the outermost layer is 18 times;
the thickness of the insulating layer (the mark is FPE162-1) is 1.6 mm;
the thickness of the low-smoke halogen-free high-flame-retardant cloth belt is 0.2mm, and the lapping and covering rate range is 15-20%;
the thickness of the inner sheath (the brand is HW495-2) is 1.2 mm;
the thickness of the outer sheath (brand HW4690-H) is 2.5 mm.
The cable can be regarded as a degradation product of a 1E-level cable, is different from 1E-level cable insulation (material), adopts a material which has the same service life of 60 years and is lower in price, is of a single-layer structure, and does not need to consider the flame retardant property of an insulating layer. The single-layer insulation is relatively low in requirement on an extrusion mode, is easier to realize for production and manufacture, and can obtain better quality control in the aspects of eccentricity, concentricity, average thickness and the like.
Compare in 1E level cable and increased one deck and separated oxygen layer structure (inner sheath), can effectively completely cut off the contact of insulating and oxygen, improve the cold resistance performance of cable.
The outer sheath is made of a low-price radiation-resistant low-smoke halogen-free flame-retardant thermoplastic sheath material, so that the overall manufacturing cost of the non-1E-level cable is reduced.
The cable application occasion of the scheme is only suitable for a gentle environment irrelevant to the safety of the nuclear power station.
After the materials of the insulating layer and the sheath layer are selected, in order to enable the cable to have the same flame retardant performance as the original 1E-grade product, a high-flame-retardant low-smoke halogen-free flame-retardant cloth belt is matched and used in the scheme, and a relatively small lapping and covering rate is selected; the existence of the oxygen isolation layer further makes up the defect that the cable is not insulated and flame-retardant, and can reduce the influence on the overall bundled flame-retardant performance of the cable after the design of insulation and flame-retardant.
This and slow environment use non-1E level cable adopt single-deck long-life insulating material to replace the double-deck insulating material that 1E level cable adopted, have reduced the production degree of difficulty, have improved the economic nature of cable. Meanwhile, the oxygen-insulating layer and the irradiation-resistant low-smoke halogen-free flame-retardant sheath material are adopted, so that the cable has good cold resistance and bundled flame-retardant performance, and can meet the technical conditions of the BOP cable in a mild environment.
The cable has the advantages that: the material has the advantages of nuclear radiation resistance, good flame retardant property, long service life, low temperature resistance and good economy.
After the scheme is adopted, the service life of the cable reaches more than 60 years, the cable is good in irradiation resistance, low-temperature resistance and processability, and the production efficiency can be effectively improved. And simultaneously meets the basic requirements of electrical and mechanical properties.
The cable of this example can be subjected to the following tests, the test result being a pass.
Claims (8)
1. The utility model provides a slow for environment non-1E level power cable of low temperature resistant nuclear power station of long-life, the external diameter scope 15 ~ 80mm of cable, characterized by structure is: the cable is formed by sequentially wrapping a wrapping layer, an inner sheath and an outer sheath outside a cable core;
the cable core is formed by twisting 2-5 cable cores and a plurality of rock wool ropes together in the right direction; the rock wool rope is respectively filled in the center of the cable core and the side clearance; the ratio of the twisted pitch to the diameter is 30-40 times;
the wire core is formed by extruding an insulating layer outside a conductor;
the cross-sectional area of the conductor is 1.5mm2～300mm2(ii) a The conductor is formed by stranding tinned copper monofilaments in multiple layers from inside to outside, the diameter range of the tinned copper monofilaments is 0.52-2.60 mm, the diameter range of the conductor is 1.7-21.0mm, the stranding pitch-diameter ratio range of the tinned copper monofilaments on the innermost layer of the conductor is 20-40, the stranding pitch-diameter ratio range of the tinned copper monofilaments on the outermost layer of the conductor is 12-20, the stranding direction of the tinned copper monofilaments on the outermost layer is in the left direction, and the stranding directions of the tinned copper monofilaments on the adjacent layers are opposite; the insulating layer is made of radiation-resistant low-smoke halogen-free flame-retardant crosslinked polyethylene insulating materialThe thickness of the insulating layer is 0.53-1.9 mm;
the wrapping layer is formed by wrapping a low-smoke halogen-free high-flame-retardant cloth tape leftwards; the thickness range of the low-smoke halogen-free high-flame-retardant cloth belt is 0.18-0.22mm, the width is 15-40 mm, and the lapping rate range is 15-20%;
the inner sheath is made of a low-smoke halogen-free flame-retardant oxygen-isolating layer sheath material, the thickness of the inner sheath is 1.0-1.8 mm, and the thickness of the thinnest part is not less than 80-0.2 mm of a nominal value;
the outer sheath is made of a long-life thermoplastic low-smoke halogen-free flame-retardant polyolefin sheath material, the nominal thickness of the outer sheath is 1.8-3.5 mm, and the thickness of the thinnest part is not less than 80-0.2 mm of the nominal value.
2. The long-life low-temperature-resistant non-1E-grade power cable for the nuclear power station and the gentle environment as claimed in claim 1, wherein the nominal thickness of the insulating layer is 0.7-1.8 mm, and the thickness of the thinnest point is not less than 90-0.1 mm of the nominal value.
3. The long-life low temperature resistant non-1E-grade power cable for nuclear power plants and soft environments as claimed in claim 1, wherein the rock wool rope is a non-dust rock wool rope made of a plurality of non-hygroscopic rock wool materials, and the diameter of a single non-dust rock wool rope is 1.8-8 mm.
4. The long life low temperature resistant non-1E-rated power cable for nuclear power plant and soft environment as claimed in claim 1, wherein the number of cores is 3, and the cross-sectional area of the conductor is 185mm2: the outer diameter of the cable is 48 mm;
the stranding pitch diameter ratio of the cable core is 32 times;
the conductor is composed of tin-plated copper monofilaments, the diameter of each tin-plated copper monofilament is 3.25mm, the stranding pitch diameter ratio of the innermost layer is 33 times, and the stranding pitch diameter ratio of the outermost layer is 18 times.
5. The long life, low temperature tolerant, non-1E rated power cable for nuclear power plants and soft environments as claimed in claim 4, wherein the thickness of the insulating layer is 1.6 mm.
6. The long-life low temperature resistant non-1E-level power cable for nuclear power plants and gentle environments as claimed in claim 4, wherein the thickness of the low-smoke halogen-free high-flame-retardant cloth tape is 0.2 mm.
7. The long life, low temperature tolerant, non-1E class power cable for nuclear power plants and soft environments as claimed in claim 4, wherein the inner sheath has a thickness of 1.2 mm.
8. The long life, low temperature tolerant, non-1E class power cable for nuclear power plants and soft environments as recited in claim 4, wherein the outer jacket has a first thickness of 2.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120638114.4U CN214796843U (en) | 2021-03-30 | 2021-03-30 | Long-life low temperature resistant nuclear power station gentle environmental non-1E level power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120638114.4U CN214796843U (en) | 2021-03-30 | 2021-03-30 | Long-life low temperature resistant nuclear power station gentle environmental non-1E level power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214796843U true CN214796843U (en) | 2021-11-19 |
Family
ID=78667653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120638114.4U Active CN214796843U (en) | 2021-03-30 | 2021-03-30 | Long-life low temperature resistant nuclear power station gentle environmental non-1E level power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214796843U (en) |
-
2021
- 2021-03-30 CN CN202120638114.4U patent/CN214796843U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211376289U (en) | Medium-voltage power cable for rail transit | |
| CN213781632U (en) | Special control cable with ozone resistance for offshore wind turbine | |
| CN211181711U (en) | Radiation-resistant, wear-resistant, flame-retardant and environment-friendly cable | |
| CN214796843U (en) | Long-life low temperature resistant nuclear power station gentle environmental non-1E level power cable | |
| CN218939315U (en) | Rail transit communication cable | |
| CN209912597U (en) | Ultraviolet irradiation resistant nuclear-grade lighting cable | |
| CN217767940U (en) | Low-smoke halogen-free B1-level flame-retardant power cable with rated voltage of 35kV for subway | |
| CN212782825U (en) | Low temperature resistant control cable for nuclear power station | |
| CN214956077U (en) | Anti-static and super-flexible special composite cable | |
| CN201758017U (en) | Low-smoke halogen-free environment-friendly flame-retardant intrinsic safety system control cable | |
| CN214336369U (en) | Long-life non-1E-level power cable for nuclear power station gentle environment | |
| CN201527828U (en) | Ethylene-propylene rubber insulated rat proof flexible cable | |
| CN210378516U (en) | Special photoelectric composite cable for intelligent city underground comprehensive pipe gallery | |
| CN214336368U (en) | Long-life non-1E-level control cable for nuclear power station and gentle environment | |
| CN210443320U (en) | Flame-retardant heat-resistant cable | |
| CN212434283U (en) | Low temperature resistant power cable for nuclear power station | |
| CN215183254U (en) | Offshore drilling platform power cable that moves about | |
| CN206441575U (en) | Times capacity midium voltage cable | |
| CN207302732U (en) | A kind of long-life lv power cable of resistance to intense radiation | |
| CN206619427U (en) | A kind of photovoltaic generation control cable always shielded with metal | |
| CN209912598U (en) | Long-term wear resistant mobile power cable | |
| CN218849155U (en) | Cross-linked PE insulated multilayer shielding anti-ultraviolet low-smoke halogen-free offshore platform communication cable | |
| CN215770559U (en) | Offshore drilling platform top drive moving jumper wire composite cable | |
| CN212392044U (en) | Offshore drilling platform top drive instrument control cable that moves about | |
| CN213242058U (en) | Control cable for small-section and small-outer-diameter nuclear power station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |