CN211555515U - Control cable for ultraviolet irradiation crosslinking type nuclear power station - Google Patents
Control cable for ultraviolet irradiation crosslinking type nuclear power station Download PDFInfo
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- CN211555515U CN211555515U CN202020505817.5U CN202020505817U CN211555515U CN 211555515 U CN211555515 U CN 211555515U CN 202020505817 U CN202020505817 U CN 202020505817U CN 211555515 U CN211555515 U CN 211555515U
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- 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
Abstract
The utility model discloses a control cable for ultraviolet irradiation cross-linking type nuclear power station belongs to wire and cable technical field for the nuclear power station. The utility model relates to an ultraviolet irradiation cross-linking type control cable for nuclear power station, which comprises a conductor, an insulating layer, an oxygen isolation layer, a wrapping tape, a shielding layer and an outer sheath; the conductor is formed by twisting a plurality of tinned copper wires; the insulating layer is of a double-layer composite structure, the inner layer insulating material is ultraviolet irradiation crosslinked polyethylene, the outer layer insulating material is ultraviolet irradiation crosslinked low-smoke halogen-free flame-retardant polyolefin, and ultraviolet irradiation crosslinking is carried out while the double-layer structure is extruded and molded at one time; the oxygen isolation layer is formed by extruding a low-smoke halogen-free flame-retardant polyolefin material; the wrapping tape is a non-hygroscopic polyester tape; the shielding layer is formed by weaving a plurality of tinned copper wires in strands; the outer sheath is formed by extruding ultraviolet irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin material; the cable structure of the utility model is reasonable in arrangement, can run for more than 60 years under the normal working condition of the nuclear power station, can resist 250kGy irradiation dose (gamma ray), and is green and environment-friendly; through the ultraviolet irradiation crosslinking mode that the extrusion and crosslinking of insulating layer, restrictive coating go on simultaneously, production efficiency improves greatly, has reduced the electric energy loss, has practiced thrift manufacturing cost, more is favorable to the domestic popularization of wire and cable product for the nuclear power station.
Description
Technical Field
The utility model relates to a cable manufacturing field is a control cable for ultraviolet ray irradiation cross-linking type nuclear power station.
Background
The cable for the nuclear power station has very high quality and safety requirements, the insulating wire core of the cable also needs to have flame retardant performance on the premise of ensuring high electrical performance, the insulating and sheath materials of the cable need to be low-smoke, non-toxic, flame-retardant and non-corrosive materials, the cable needs to have radiation resistance, and the cable still has the service life of more than 60 years even if the cable continuously operates at the highest working temperature of a conductor or is radiated under normal working conditions.
Although the current wire and cable products for the nuclear power station get rid of foreign imports and gradually realize localization, the production cost is always higher than that of the same type of civil products.
The insulation and the sheath of the cable product for the traditional nuclear power station are crosslinked in a high-energy electron beam irradiation mode, the irradiation equipment is high in purchase cost, huge in civil engineering, long in starting time, large in electric energy consumption during operation, limited in electron beam penetration capacity, prone to the condition that the cable with the large outer diameter is uneven in irradiation, prone to secondary irradiation, and production efficiency is reduced and production cost is increased.
The state intellectual property office in 2017, 2 month 8, discloses that the suggestion publication number is CN205943507U, the utility model patent of the name is "control cable for nuclear power station", this utility model includes conductor, insulating layer, inner sheath and oversheath, the insulating layer is the double-deck crowded package structure altogether of irradiation crosslinked polyethylene inner insulating layer and fire-retardant irradiation crosslinked polyolefin outer insulating layer, and conductor and insulating layer constitute insulation core, and a plurality of insulation core strands become the cable core, and the cable core clearance is equipped with the filling layer, and the cable core overlaps outward in proper order to have the polyester tape to wind the covering, has woven tinned soft copper wire to weave the shielding layer around the covering, has the inner sheath around the shielding layer, has woven the tinned copper wire to weave the armor between the inside and outside oversheath, and its crowded package thermosetting polyolefin oversheath. The utility model discloses an electron beam irradiation cross-linked material is all adopted to product inside and outside layer insulation and oversheath, and the production technology flow is more and manufacturing cost is higher. The utility model discloses a product has increased in the shielding around covering, inner sheath, tinned copper wire woven armor outside the shielding layer is woven to the tinned soft copper wire and in the outer jacket, and above structure function is repeated, has surpassed current nuclear power product technical specification requirement, and has further increased product cost, is unfavorable for using widely.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming above-mentioned defect, provide an ultraviolet ray irradiation cross-linking type control cable for nuclear power station. The utility model has the following characteristics: the structure design is simple and reasonable; the process is simple and convenient, the production effect is high, and the production cost is low; low smoke, no halogen, flame retardation, low toxicity and ultraviolet resistance; the minimum service life of the product is 60 years; the radiation resistance is good, and the radiation resistant material can resist 250kGy irradiation dose (gamma rays); the temperature resistant range is-35 ℃ to 90 ℃.
The utility model discloses a following technical scheme realizes:
a control cable for an ultraviolet irradiation crosslinking type nuclear power station comprises a conductor, an insulating layer, an oxygen isolation layer, a wrapping tape, a shielding layer and an outer sheath; the conductor is formed by twisting a plurality of tinned copper wires; the insulating layer is of a double-layer composite structure, the inner layer insulating material is ultraviolet irradiation crosslinked polyethylene, the outer layer insulating material is ultraviolet irradiation crosslinked low-smoke halogen-free flame-retardant polyolefin, and ultraviolet irradiation crosslinking is carried out while the double-layer structure is extruded and molded at one time; the oxygen isolation layer is formed by extruding a low-smoke halogen-free flame-retardant polyolefin material; the wrapping tape is a non-hygroscopic polyester tape; the shielding layer is formed by weaving a plurality of tinned copper wires in strands; the outer sheath is formed by extruding ultraviolet irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin material.
The conductor is formed by twisting a plurality of strands of tinned copper wires, the twisting direction of the outermost layer is in the left direction, and the twisting directions of adjacent layers are opposite.
The insulating layer is extruded and coated on the outer side of the conductor, and the insulating thickness ratio of the inner layer to the outer layer is 3: 7.
the oxygen isolation layer is made of low-smoke halogen-free flame-retardant polyolefin materials, extrusion type dies are adopted for extrusion, the extrusion type dies are uniformly extruded and wrapped on the outer side of a cable core and between gaps formed by stranding of the insulation wire cores, and the oxygen index is higher than 40.
The wrapping tape is composed of a non-hygroscopic polyester tape with the thickness of 0.04mm and the width of 20 mm-70 mm, and is lapped and wrapped outside the oxygen isolation layer in an overlapping and covering rate of 15%.
The shielding layer is formed by weaving a plurality of 0.12-0.25 mm tinned copper wires in strands, the weaving density is not less than 85%, and the continuous resistance value is not more than 10 omega/km.
The outer sheath is extruded outside the shielding layer, and the oxygen index is higher than 32.
Compared with the prior art, the utility model, profitable technological effect who brings shows:
1. the whole structure design is simple and reasonable, and the technical specification requirements of the existing control cable product for the nuclear power station are met.
2. The insulating layer adopts double-deck composite construction, and the inlayer insulating material is ultraviolet irradiation crosslinked polyethylene, and outer insulating material is ultraviolet irradiation crosslinked low smoke and zero halogen fire-retardant polyolefin, and double-deck structure one-time extrusion moulding satisfies that the cable insulation sinle silk for the nuclear power station has high electrical property and fire behaviour's requirement concurrently. The outer sheath is formed by extruding ultraviolet irradiation crosslinking low-smoke halogen-free flame retardant polyolefin material, and an oxygen isolation layer structure is added, so that the flame retardant property is further improved.
3. The utility model discloses the cross-linking mode of insulating and oversheath is the ultraviolet irradiation cross-linking, and it is cross-linked for current electron beam irradiation: the equipment and raw material purchasing cost is low, additional civil engineering is not needed, the online crosslinking process is simple, the irradiation is uniform, the electric energy loss is low, the production cost can be effectively reduced, and the production efficiency is improved.
4. The insulation and sheath material has a thermal life longer than 60 years after long-term heat resistance evaluation, and the finished cable can tolerate 250kGy irradiation dose (gamma rays) under normal working conditions and meet the requirement of the latest nuclear power station on the service life.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of the present invention.
Reference numeral 1: 1. conductor, 2, inner insulation, 3, outer insulation, 4, oxygen barrier, 5, belting, 6, shielding layer, 7, oversheath.
Detailed Description
Example 1
As a preferred embodiment of the present invention, refer to the attached figure 1:
the control cable for the ultraviolet irradiation crosslinking type nuclear power station is mainly composed of a conductor, an insulating layer, an oxygen isolation layer, a wrapping tape, a shielding layer and an outer sheath; the conductor is formed by twisting a plurality of tinned copper wires; the insulating layer is of a double-layer composite structure, the inner layer insulating material is ultraviolet irradiation crosslinked polyethylene, the outer layer insulating material is ultraviolet irradiation crosslinked low-smoke halogen-free flame-retardant polyolefin, and ultraviolet irradiation crosslinking is carried out while the double-layer structure is extruded and molded at one time; the oxygen isolation layer is formed by extruding a low-smoke halogen-free flame-retardant polyolefin material; the wrapping tape is a non-hygroscopic polyester tape; the shielding layer is formed by weaving a plurality of tinned copper wires in strands; the outer sheath is formed by extruding ultraviolet irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin material.
Example 2
As another preferred embodiment of the present invention, refer to the attached fig. 1:
the control cable for the ultraviolet irradiation crosslinking type nuclear power station is mainly composed of a conductor, an insulating layer, an oxygen isolation layer, a wrapping tape, a shielding layer and an outer sheath; the conductor is formed by twisting a plurality of tinned copper wires; the insulating layer is of a double-layer composite structure, the inner layer insulating material is ultraviolet irradiation crosslinked polyethylene, the outer layer insulating material is ultraviolet irradiation crosslinked low-smoke halogen-free flame-retardant polyolefin, and ultraviolet irradiation crosslinking is carried out while the double-layer structure is extruded and molded at one time; the oxygen isolation layer is formed by extruding a low-smoke halogen-free flame-retardant polyolefin material; the wrapping tape is a non-hygroscopic polyester tape; the shielding layer is formed by wrapping a copper strip; the outer sheath is formed by extruding ultraviolet irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin material.
Claims (7)
1. The utility model provides an ultraviolet ray irradiation cross-linking type control cable for nuclear power station, includes conductor (1), insulating layer (2), separates oxygen layer (3), band (4), shielding layer (5), oversheath (6), its characterized in that: the conductor (1) is formed by stranding a plurality of strands of tinned copper wires; the insulating layer (2) is of a double-layer composite structure, the inner layer insulating material is ultraviolet irradiation crosslinked polyethylene, the outer layer insulating material is ultraviolet irradiation crosslinked low-smoke halogen-free flame-retardant polyolefin, and the double-layer structure is extruded and molded at one time and simultaneously subjected to ultraviolet irradiation crosslinking; the oxygen isolation layer (3) is formed by extruding a low-smoke halogen-free flame-retardant polyolefin material in an extrusion manner; the wrapping tape (4) is a non-hygroscopic polyester tape; the shielding layer (5) is formed by weaving tinned copper wires in strands; the outer sheath (6) is made of ultraviolet irradiation crosslinking low-smoke halogen-free flame retardant polyolefin material, and ultraviolet irradiation crosslinking is carried out during extrusion molding.
2. The control cable for the ultraviolet light irradiation crosslinking type nuclear power station as claimed in claim 1, wherein: the conductor (1) is formed by twisting a plurality of strands of tinned copper wires, the twisting direction of the outermost layer is in the left direction, and the twisting directions of adjacent layers are opposite.
3. The control cable for the ultraviolet light irradiation crosslinking type nuclear power station as claimed in claim 1, wherein: the insulating layer (2) is extruded outside the conductor (1), and the thickness ratio of the inner layer to the outer layer is 3: 7.
4. the control cable for the ultraviolet light irradiation crosslinking type nuclear power station as claimed in claim 1, wherein: oxygen isolation layer (3) are low smoke and zero halogen fire-retardant polyolefin material and constitute, adopt extrusion formula mould to extrude, evenly extrude the package in the cable core outside and the gap that are formed by the transposition of insulation core, and the oxygen index is higher than 40.
5. The control cable for the ultraviolet light irradiation crosslinking type nuclear power station as claimed in claim 1, wherein: the wrapping tape (4) is made of non-hygroscopic polyester tape with the thickness of 0.04mm and the width of 20 mm-70 mm, and is lapped and wrapped outside the oxygen isolation layer (3) in an overlapping and covering rate of 15%.
6. The control cable for the ultraviolet light irradiation crosslinking type nuclear power station as claimed in claim 1, wherein: the shielding layer (5) is formed by weaving a plurality of 0.12-0.25 mm tinned copper wires in strands, the weaving density is not less than 85%, and the continuous resistance value is not more than 10 omega/km.
7. The control cable for the ultraviolet light irradiation crosslinking type nuclear power station as claimed in claim 1, wherein: the outer sheath (6) is extruded outside the shielding layer (5), and the oxygen index is higher than 32.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020505817.5U CN211555515U (en) | 2020-04-09 | 2020-04-09 | Control cable for ultraviolet irradiation crosslinking type nuclear power station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020505817.5U CN211555515U (en) | 2020-04-09 | 2020-04-09 | Control cable for ultraviolet irradiation crosslinking type nuclear power station |
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| CN211555515U true CN211555515U (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020505817.5U Active CN211555515U (en) | 2020-04-09 | 2020-04-09 | Control cable for ultraviolet irradiation crosslinking type nuclear power station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113488278A (en) * | 2021-08-17 | 2021-10-08 | 四川蓝电电缆科技有限公司 | B1-grade high-flame-retardant multi-core cable and manufacturing method thereof |
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2020
- 2020-04-09 CN CN202020505817.5U patent/CN211555515U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113488278A (en) * | 2021-08-17 | 2021-10-08 | 四川蓝电电缆科技有限公司 | B1-grade high-flame-retardant multi-core cable and manufacturing method thereof |
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