CN205140539U - Fire -retardant flexible high voltage DC cable of using in tunnel that blocks water - Google Patents
Fire -retardant flexible high voltage DC cable of using in tunnel that blocks water Download PDFInfo
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- CN205140539U CN205140539U CN201520952573.4U CN201520952573U CN205140539U CN 205140539 U CN205140539 U CN 205140539U CN 201520952573 U CN201520952573 U CN 201520952573U CN 205140539 U CN205140539 U CN 205140539U
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- blocks water
- direct current
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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
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Abstract
The utility model discloses a fire -retardant flexible high voltage DC cable of using in tunnel that blocks water, including cable block water conductor, conductor shield, insulating layer, insulation screen, semiconduction block water buffer layer, metal sheath and outer jacket, the cable blocks water the conductor and blocks water conductors by a plurality of root and constitute, and the every conductor that blocks water all is provided with conductor shield outward, conductor shield is equipped with the insulating layer outward, the insulating layer is equipped with insulation screen outward, insulation screen is equipped with the semiconduction buffer layer that blocks water outward, the semiconduction blocks water the buffer layer and is equipped with the metal sheath outward, the metal sheath is equipped with the outer jacket outward. The utility model discloses operation safe and reliable, it is correlated with to satisfy standardizes the requirement, can the wide application in there being the fire -retardant tunnel that blocks water the requirement to lay the place.
Description
Technical field
The utility model relates to a kind of flexible direct current cable, particularly relates to a kind of fire-retardant flexible direct current high-tension cable that blocks water being adapted at applying in tunnel.
Background technology
Technology of HVDC based Voltage Source Converter is a kind of VSC-HVDC technology based on voltage source converter technology (VSC), have transmit identical transmitted power time circuit cost low, line loss is little, system stability, active power and Reactive Power Control flexible, reliable, facilitate the advantage such as built by separate periods and compatilizing mechanism, therefore worldwide receive increasing concern.At present, that existing flexible DC power transmission engineering electric pressure is the highest in the world is ± 320kV, Jin You international minority giant cable enterprise has grasped the production of superhigh voltage DC cable, manufacture and laying technology, therefore, domestic cable manufacturers is badly in need of breaking through overseas market monopolization, develops the superhigh pressure flexible direct current cable series of products with independent intellectual property right.
High-tension cable conventional laying mode comprises directly buried installation, comb lays, cable trough lays and lays with tunnel, and different system of layings has different requirements for the stuctures and properties of cable.Cable tunnel lays has that circuit conveying capacity is strong, floor space is few, space availability ratio is high, be convenient to the advantages such as maintenance.But cable tunnel is the Different high risk sites that fire occurs equally, in case of fire, higher temperature is maintained in tunnel, cable is easy to sustained combustion, fire development is more rapid, and construction of cable possibility major injury, easily causes large-area power-cuts, and gateway, tunnel is less, cause larger difficulty to fire extinguishing.Therefore, based on the fire protection requirement in tunnel, need cable jacket to have excellent fire resistance.Meanwhile, cable tunnel majority is the environment that infiltration or air humidity are larger, therefore requires the construction of cable has good block-water performance, reduces the danger that cable finally causes electrically puncturing owing to producing water tree.
Cable plastic extrusion jacket material conventional at present comprises polyethylene (PE) and polyvinyl chloride (PVC), common PE material oxygen index is lower than 20, only be made up of carbon, hydrogen two kinds of elements, and containing certain side chain and crosslinking phenomena in molecular structure, the carrying out that active very large chemical free-radical promotes to burn further can be produced when burning, not only therefore the cable of common PE sheath can not put out certainly when meeting naked light, level prolongs the speed of combustion also very soon on the contrary, is therefore unsuitable for being used as the jacket material that tunnel lays high-tension cable.Have in the engineering of fire-retardant demand that to apply more be flame-proof PVC sheath cable at present, contrast PE, PVC has more excellent fire resistance, reason is relevant with the effect of chlorine atom in its molecular structure, namely there is the oxygen index being not less than 27 under the prerequisite of not adding fire retardant, by the C class bunched burning test that GB/T18380.35-2008 " cable and the burning test of optical cable under flame condition the 35th part: vertically arranged bunchy electric wire flame vertical spreads test C class " specifies, after adding fire retardant, oxygen index is more than 30, by category-A bunched burning test.But considering that polyvinyl chloride can separate out the toxic gases such as hydrogen chloride when burning, affecting health and even causing casualties, therefore state's inner tunnel lays high-tension cable and eliminates PVC successively as jacket material.
Fire-retardant polyethylene material is introduced additive flame retardant by the mode of physical blending and is played fire retardation in base polyethylene material, and the polythene material after doping has good fire resistance, can meet the flame-retardancy requirements that high-tension cable uses in tunnel.
Utility model content
Utility model object: the purpose of this utility model is to solve deficiency of the prior art, provide a kind of fire-retardant flexible direct current high-tension cable that blocks water being adapted at using in tunnel, it is safe and reliable to operation, can meet related specifications requirement.
Technical scheme: the fire-retardant flexible direct current high-tension cable that blocks water applied in a kind of tunnel described in the utility model, comprises cable water-blocking conductor, conductor shield, insulating barrier, insulation screen, semiconductive water-blocking buffer layer, metal sheath and outer jacket; Described cable water-blocking conductor is made up of some water-blocking conductors, and be provided with conductor shield outside every root water-blocking conductor, insulating barrier is provided with outside described conductor shield, insulation screen is provided with outside described insulating barrier, semiconductive water-blocking buffer layer is provided with outside described insulation screen, be provided with metal sheath outside described semiconductive water-blocking buffer layer, outside described metal sheath, be provided with outer jacket.
Further, described water-blocking conductor adopts the one in annealed copper conductor, aluminum or aluminum alloy conductor.
Further, described conductor shield adopts and extrudes semi-conductive layer or adopt semiconductive band and extrude semi-conductive layer and combine.
Further, described insulating barrier adopts direct current cables special ultra-clean thermoset crosslink polyethylene Insulation Material to make.
Further, described insulation screen adopts the special material of partly leading of direct current cables with ultra-smooth performance, high conduction performance and thermosetting property to make.
Further, described semiconductive water-blocking buffer layer is blocked water by multilayer semiconductive, and buffer strip is wrapped to be made.
Further, the semiconductive that described semiconductive water-blocking buffer layer is 1.0-5.0mm by least four layer thicknesses blocks water, and buffer strip is wrapped to be made.
Further, the described metal sheath one that adopts aluminium embossed sheath or extrude in lead sheath.
Further, described outer jacket adopts the fire-retardant polyethylene material be directly extruded on described metal sheath.
Beneficial effect: insulating barrier described in the utility model adopts the special crosslinked polyethylene insulation material of direct current cables, makes the satisfied VSC-HVDC technology instructions for use based on voltage source converter technology (VSC) of the utility model; In the outer wrapped semiconductive water-blocking buffer layer of insulation shielding, the utility model is made to have excellent longitudinal water-blocking performance; Fire-retardant polyethylene material is used to extrude processing cable oversheath, the utility model is made not only to have good fire resistance, also greatly reduce as PVC sheath produces the harm of a large amount of toxic gas when breaking out of fire, and according to the thickness of product real needs adjustment oversheath to meet the requirement of cable different brackets fire resistance, can be widely used in tunnel and lay.
Accompanying drawing explanation
Fig. 1 is the utility model overall structure schematic diagram.
Embodiment
The fire-retardant flexible direct current high-tension cable that blocks water applied in a kind of tunnel as shown in Figure 1, comprises cable water-blocking conductor 1, conductor shield 2, insulating barrier 3, insulation screen 4, semiconductive water-blocking buffer layer 5, metal sheath 6 and outer jacket 7; Described cable water-blocking conductor 1 is made up of some water-blocking conductors, and be provided with conductor shield 2 outside every root water-blocking conductor, insulating barrier 3 is provided with outside described conductor shield 2, insulation screen 4 is provided with outside described insulating barrier 3, semiconductive water-blocking buffer layer 5 is provided with outside described insulation screen 4, be provided with metal sheath 6 outside described semiconductive water-blocking buffer layer 5, outside described metal sheath 6, be provided with outer jacket 7.
As the further optimization of technique scheme, described water-blocking conductor adopts the one in annealed copper conductor, aluminum or aluminum alloy conductor.Described conductor shield 2 adopts and extrudes semi-conductive layer or adopt semiconductive band and extrude semi-conductive layer and combine.Described insulating barrier 3 adopts direct current cables special ultra-clean thermoset crosslink polyethylene Insulation Material to make.Described insulation screen 4 adopts the special material of partly leading of direct current cables with ultra-smooth performance, high conduction performance and thermosetting property to make.The semiconductive that described semiconductive water-blocking buffer layer 5 is 1.0-5.0mm by least four layer thicknesses blocks water, and buffer strip is wrapped to be made.Described metal sheath 6 adopts aluminium embossed sheath or extrudes the one in lead sheath.
More than for be described in detail an embodiment of the present utility model, but content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalizations done according to the utility model application range change and improve, and all should not get rid of outside protection range of the present utility model.
Claims (9)
1. the fire-retardant flexible direct current high-tension cable that blocks water applied in tunnel, is characterized in that: comprise cable water-blocking conductor (1), conductor shield (2), insulating barrier (3), insulation screen (4), semiconductive water-blocking buffer layer (5), metal sheath (6) and outer jacket (7); Described cable water-blocking conductor (1) is made up of some water-blocking conductors, and be provided with conductor shield (2) outside every root water-blocking conductor, insulating barrier (3) is provided with outside described conductor shield (2), insulation screen (4) is provided with outside described insulating barrier (3), semiconductive water-blocking buffer layer (5) is provided with outside described insulation screen (4), be provided with metal sheath (6) outside described semiconductive water-blocking buffer layer (5), outside described metal sheath (6), be provided with outer jacket (7).
2. the fire-retardant flexible direct current high-tension cable that blocks water applied in a kind of tunnel according to claim 1, is characterized in that: described water-blocking conductor adopts the one in annealed copper conductor, aluminum or aluminum alloy conductor.
3. the fire-retardant flexible direct current high-tension cable that blocks water applied in a kind of tunnel according to claim 1, is characterized in that: described conductor shield (2) adopts and extrudes semi-conductive layer or adopt semiconductive band and extrude semi-conductive layer and combine.
4. the fire-retardant flexible direct current high-tension cable that blocks water applied in a kind of tunnel according to claim 1, is characterized in that: described insulating barrier (3) adopts direct current cables special ultra-clean thermoset crosslink polyethylene Insulation Material to make.
5. the fire-retardant flexible direct current high-tension cable that blocks water applied in a kind of tunnel according to claim 1, is characterized in that: described insulation screen (4) adopts the special material of partly leading of direct current cables with ultra-smooth performance, high conduction performance and thermosetting property to make.
6. the fire-retardant flexible direct current high-tension cable that blocks water applied in a kind of tunnel according to claim 1, is characterized in that: described semiconductive water-blocking buffer layer (5) is blocked water by multilayer semiconductive, and buffer strip is wrapped to be made.
7. the fire-retardant flexible direct current high-tension cable that blocks water applied in a kind of tunnel according to claim 6, is characterized in that: the semiconductive that described semiconductive water-blocking buffer layer (5) is 1.0-5.0mm by least four layer thicknesses blocks water, and buffer strip is wrapped to be made.
8. the fire-retardant flexible direct current high-tension cable that blocks water applied in a kind of tunnel according to claim 1, is characterized in that: the one that described metal sheath (6) adopts aluminium embossed sheath or extrudes in lead sheath.
9. the fire-retardant flexible direct current high-tension cable that blocks water applied in a kind of tunnel according to claim 1, is characterized in that: described outer jacket (7) adopts the fire-retardant polyethylene material be directly extruded on described metal sheath (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520952573.4U CN205140539U (en) | 2015-11-26 | 2015-11-26 | Fire -retardant flexible high voltage DC cable of using in tunnel that blocks water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520952573.4U CN205140539U (en) | 2015-11-26 | 2015-11-26 | Fire -retardant flexible high voltage DC cable of using in tunnel that blocks water |
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| Publication Number | Publication Date |
|---|---|
| CN205140539U true CN205140539U (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520952573.4U Active CN205140539U (en) | 2015-11-26 | 2015-11-26 | Fire -retardant flexible high voltage DC cable of using in tunnel that blocks water |
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| CN (1) | CN205140539U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105336391A (en) * | 2015-11-26 | 2016-02-17 | 中天科技海缆有限公司 | Flame-retardant water-blocking flexible direct-current high-voltage cable applied to tunnel |
| CN105825950A (en) * | 2016-04-29 | 2016-08-03 | 芜湖诚通自动化设备有限公司 | Superhigh voltage crosslinked polyethylene insulating flexible power cable and preparation method |
-
2015
- 2015-11-26 CN CN201520952573.4U patent/CN205140539U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105336391A (en) * | 2015-11-26 | 2016-02-17 | 中天科技海缆有限公司 | Flame-retardant water-blocking flexible direct-current high-voltage cable applied to tunnel |
| CN105825950A (en) * | 2016-04-29 | 2016-08-03 | 芜湖诚通自动化设备有限公司 | Superhigh voltage crosslinked polyethylene insulating flexible power cable and preparation method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | "change of name, title or address" | ||
| CP03 | "change of name, title or address" |
Address after: 226010 No. 1 South Road, Nantong economic and Technological Development Zone, Jiangsu, China Patentee after: Zhongtian Technology submarine cable Co., Ltd Address before: 226000 No. 1 South Road, Nantong economic and Technological Development Zone, Jiangsu, China Patentee before: ZHONGTAN TECHNOLOGY SUBMARINE CABLE Co.,Ltd. |