CN104575765A - Cable with internal stress cracking resistance function - Google Patents
Cable with internal stress cracking resistance function Download PDFInfo
- Publication number
- CN104575765A CN104575765A CN201410826791.3A CN201410826791A CN104575765A CN 104575765 A CN104575765 A CN 104575765A CN 201410826791 A CN201410826791 A CN 201410826791A CN 104575765 A CN104575765 A CN 104575765A
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- China
- Prior art keywords
- cable
- internal stress
- overcoat
- protection layers
- bed course
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- 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.)
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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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- Ropes Or Cables (AREA)
Abstract
The invention discloses a cable with an internal stress cracking resistance function. The cable comprises 4-6 core wires which are annularly and uniformly distributed, center connecting lines of the core wires form a regular polygon, the outer wall of each core wire is covered with an insulation layer which is covered with a protection layer, adjacent protection layers are connected through connecting parts made of the same material to form a whole structure of a multi-link mechanism, and a ventilation cavity whose periphery is defined by the protection layers and the connecting parts is formed in the center of the cable and radiates heat along the axis of the cable. By means of the arrangement mode of the core wires and through structural improvement of the protection layers, one unstable multi-link mechanism is formed among the protection layers of the wrapped core wires, the protection layers of the multi-link mechanism can distort along with internal stress generated through heat-cold change and illumination change, then the internal stress is released effectively through the change of the protection layers, so that the cracking phenomena of the cable protection layers are reduced, and the service life of the cable is prolonged.
Description
Technical field
The present invention relates to technical field of electric wires and cables, especially a kind of anti-internal stress fission cable.
Background technology
Along with the development of economic society, the application of cable in industry-by-industry is more and more extensive.Generally speaking; cable is usually all mounted in pipeline or exposes in atmosphere; cable is after being subject to long cold and hot difference variation and illumination variation; cable inside there will be the phenomenon of expanding with heat and contract with cold and produces interior varying stress; because cable is as a whole; there is not the space of Stress Release in cable inside; therefore the interior varying stress produced is easy to cause breaking of Exterior cable protective layer; there is the problem that heart yearn is exposed; thus affecting the normal use of cable, the useful life of cable also cannot meet the demands.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiency in prior art, provides a kind of and can discharge the internal stress produced because of cold and hot change, the anti-internal stress fission cable breaking, extend cable useful life effectively preventing Exterior cable overcoat.
The technical solution adopted for the present invention to solve the technical problems is: a kind of anti-internal stress fission cable, there are 4 ~ 6 heart yearns, described heart yearn annular is uniform and its line of centres forms regular polygon, heart yearn outer wall is coated with insulating barrier, insulating barrier periphery is coated with overcoat, be interconnected to constitute the overall structure of multi-connecting-rod mechanism between adjacent overcoat by the connecting portion of same material, described cable center has the vented cavity that surrounding is surrounded by overcoat and connecting portion, extends distribute heat along cable axis.
Described protection coating materials is PVC or polyurethane or silicon rubber; Described insulating layer material is PVC or XLPE or silicon rubber.
Described insulating barrier outer wall is coated with the first bed course, is coated with the screen that can reduce electromagnetic interference at the outer wall of the first bed course, by screen interaction energy shielding external interference signals, guarantees the accuracy of cable transmission signal.
For reducing the sharp position of screen to the damage of overcoat, between described screen and overcoat, be provided with the second bed course of interval and protective effect.
The first described bed course and the material of the second bed course are polyester or PP or nonwoven fabrics.
The invention has the beneficial effects as follows: the present invention is by improving the structure of heart yearn arrangement and overcoat, make the multi-connecting-rod mechanism that between the overcoat of cladding core wire, formation one is unstable, because multi-connecting-rod mechanism can carry out distortion along with the internal stress produced by cold and hot change and illumination variation, internal stress is made to obtain effective release by the change of overcoat, thus decrease cable shield cracking phenomena, extend the useful life of cable; Vented cavity can distribute the heat that cable produces in time, reduces cable owing to sending out distortion thermogenetic, prevents the strain cracking of cable further.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of the first embodiment of the present invention.
Fig. 2 is the principle schematic of the first embodiment of the present invention.
Fig. 3 is stress and the Strain Distribution schematic diagram of AB section in Fig. 2.
Fig. 4 is stress and the Strain Distribution schematic diagram of AC section in Fig. 2.
Fig. 5 is the structural representation of the second embodiment of the present invention.
Fig. 6 is the structural representation of the third embodiment of the present invention.
1. heart yearn 2. insulating barrier 3. overcoat 4. connecting portion 5. vented cavity 6. first bed course 7. screen 8. second bed courses in figure
Embodiment
The present invention is further illustrated with preferred embodiment by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
As shown in Figure 1 be the structural representation of the first embodiment of the present invention, a kind of anti-internal stress fission cable, there is the heart yearn 1 that four annulars are uniform, the line of centres of four heart yearns 1 forms square, the insulating barrier 2 that material is PVC is coated with at the outer wall of every root heart yearn 1, described insulating barrier 2 outer wall is coated with the first bed course 6, is coated with the screen 7 that can reduce electromagnetic interference at the outer wall of the first bed course 6.
Screen 7 outer wall is coated with the overcoat 3 that material is PVC, be interconnected by the connecting portion 4 with material between adjacent overcoat 3, connect into integrally-built overcoat 3 and connecting portion 4 forms quadric chain, described cable center has along cable axis extension, for distributing the vented cavity 5 of cable work calories, this vented cavity 5 surrounding surrounded by the inner side of overcoat 3 and connecting portion 4.
Because screen 7 is made of metal usually, sharp position may be there is and damage overcoat 3, between screen 7 and overcoat 3, being therefore provided with the second bed course 8 of interval and protective effect.
The material of above-mentioned first bed course 6 and the second bed course 8 is polyester.
As Fig. 2 be the present invention for the principle schematic of the first embodiment, and with A, B, C, D, mark is numbered to each heart yearn.When cable laying, top is subject to strong illumination, the stress and strain distribution AB section as shown in Figure 3 that cable inside produces and the AC section shown in Fig. 4, wherein σ represents stress, Δ represents strain, AC bar and BD bar outwards stretch with arc around C, D fulcrum because top is heated simultaneously, cable now can Free Transform thus material internal can not produce extra stress, and cable material also would not produce fatigue damage; Upon a drop in temperature, AB bar is just in time contrary with the stress suffered by AC bar, catches a cold and AC bar and BD bar are inwardly shortened with arc around C, D fulcrum in cable top, thus cable material inside can not produce extra stress, the safe handling of protection cable.When this whole cable is heated or temperature decline, four bar structures in schematic diagram can outwards stretch simultaneously or inwardly bounce back, and make can not produce extra stress in cable material, thus protect cable injury-free or aging.The design of this special construction can protect cable to avoid illumination or the aging or cracking brought that expands with heat and contract with cold just.
As shown in Figure 5 be the structural representation of the second embodiment of the present invention, a kind of anti-internal stress fission cable, there is the heart yearn 1 that five annulars are uniform, the line of centres of five heart yearns 1 forms regular pentagon, the insulating barrier 2 that material is XLPE is coated with at the outer wall of every root heart yearn 1, described insulating barrier 2 outer wall is coated with the first bed course 6, is coated with the screen 7 that can reduce electromagnetic interference at the outer wall of the first bed course 6.
Screen 7 outer wall is coated with the overcoat 3 that material is polyurethane, be interconnected by the connecting portion 4 with material between adjacent overcoat 3, connect into integrally-built overcoat 3 and connecting portion 4 forms five-bar mechanism, described cable center has along cable axis extension, for distributing the vented cavity 5 of cable work calories, this vented cavity 5 surrounding surrounded by the inner side of overcoat 3 and connecting portion 4.
Because screen 7 is made of metal usually, sharp position may be there is and damage overcoat 3, between screen 7 and overcoat 3, being therefore provided with the second bed course 8 of interval and protective effect.
The material of above-mentioned first bed course 6 and the second bed course 8 is PP.
As shown in Figure 6 be the structural representation of the third embodiment of the present invention, a kind of anti-internal stress fission cable, there is the heart yearn 1 that six roots of sensation annular is uniform, the line of centres of six roots of sensation heart yearn 1 forms regular hexagon, the insulating barrier 2 that material is silicon rubber is coated with at the outer wall of every root heart yearn 1, described insulating barrier 2 outer wall is coated with the first bed course 6, is coated with the screen 7 that can reduce electromagnetic interference at the outer wall of the first bed course 6.
Screen 7 outer wall is coated with the overcoat 3 that material is silicon rubber, be interconnected by the connecting portion 4 with material between adjacent overcoat 3, connect into integrally-built overcoat 3 and connecting portion 4 forms six bar mechanism, described cable center has along cable axis extension, for distributing the vented cavity 5 of cable work calories, this vented cavity 5 surrounding surrounded by the inner side of overcoat 3 and connecting portion 4.
Because screen 7 is made of metal usually, sharp position may be there is and damage overcoat 3, between screen 7 and overcoat 3, being therefore provided with the second bed course 8 of interval and protective effect.
The material of above-mentioned first bed course 6 and the second bed course 8 is nonwoven fabrics.
The present invention is by improving the structure of heart yearn 1 arrangement and overcoat 3, make the multi-connecting-rod mechanism that between the overcoat 3 of cladding core wire 1, formation one is unstable, because multi-connecting-rod mechanism can carry out distortion along with the internal stress produced by cold and hot change and illumination variation, internal stress is made to obtain effective release by the change of overcoat 3, thus decrease cable shield 3 cracking phenomena, extend the useful life of cable; The heat produced when vented cavity 5 can distribute cable work is in time set, reduces cable due to the distortion caused of generating heat, prevent the strain cracking of cable further.
Above-described embodiment is only for illustrating technical conceive of the present invention and feature; its object is to person skilled in the art can be understood content of the present invention and be implemented; can not limit the scope of the invention with this; all equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (6)
1. an anti-internal stress fission cable, there are 4 ~ 6 heart yearns (1), it is characterized in that: described heart yearn (1) annular is uniform and its line of centres forms regular polygon, heart yearn (1) outer wall is coated with insulating barrier (2), insulating barrier (2) periphery is coated with overcoat (3), by being interconnected to constitute the overall structure of multi-connecting-rod mechanism with the connecting portion (4) of material between adjacent overcoat (3), described cable center has surrounding and is surrounded by overcoat (3) and connecting portion (4), the vented cavity (5) of distribute heat is extended along cable axis.
2. anti-internal stress fission cable according to claim 1, is characterized in that: described overcoat (3) material is PVC or polyurethane or silicon rubber.
3. anti-internal stress fission cable according to claim 1, is characterized in that: described insulating barrier (2) material is PVC or XLPE or silicon rubber.
4. anti-internal stress fission cable according to claim 1, it is characterized in that: described insulating barrier (2) outer wall is coated with the first bed course (6), be coated with the screen (7) that can reduce electromagnetic interference at the outer wall of the first bed course (6).
5. anti-internal stress fission cable according to claim 4, is characterized in that: the second bed course (8) being provided with interval and protective effect between described screen (7) and overcoat (3).
6. anti-internal stress fission cable according to claim 5, is characterized in that: described the first bed course (6) and the material of the second bed course (8) are polyester or PP or nonwoven fabrics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410826791.3A CN104575765A (en) | 2014-12-26 | 2014-12-26 | Cable with internal stress cracking resistance function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410826791.3A CN104575765A (en) | 2014-12-26 | 2014-12-26 | Cable with internal stress cracking resistance function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104575765A true CN104575765A (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410826791.3A Pending CN104575765A (en) | 2014-12-26 | 2014-12-26 | Cable with internal stress cracking resistance function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104575765A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010058385A1 (en) * | 2008-11-20 | 2010-05-27 | Nexans | An infrared radiation reflecting cable |
| CN201765858U (en) * | 2010-07-28 | 2011-03-16 | 远东电缆有限公司 | Intelligent comprehensive wiring cable for building decoration |
| CN202632820U (en) * | 2012-04-16 | 2012-12-26 | 中特华星电缆股份有限公司 | Electric automobile special-purpose shield cable |
| CN202796216U (en) * | 2012-10-10 | 2013-03-13 | 浙江昌泰电力电缆有限公司 | Parallel bunched cable |
| CN104517669A (en) * | 2014-12-25 | 2015-04-15 | 常州市瑞福汽车部件有限公司 | Cable capable of resisting strain cracking |
| CN204315262U (en) * | 2014-12-26 | 2015-05-06 | 江苏昌盛电缆集团有限公司 | Anti-internal stress fission cable |
-
2014
- 2014-12-26 CN CN201410826791.3A patent/CN104575765A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010058385A1 (en) * | 2008-11-20 | 2010-05-27 | Nexans | An infrared radiation reflecting cable |
| CN201765858U (en) * | 2010-07-28 | 2011-03-16 | 远东电缆有限公司 | Intelligent comprehensive wiring cable for building decoration |
| CN202632820U (en) * | 2012-04-16 | 2012-12-26 | 中特华星电缆股份有限公司 | Electric automobile special-purpose shield cable |
| CN202796216U (en) * | 2012-10-10 | 2013-03-13 | 浙江昌泰电力电缆有限公司 | Parallel bunched cable |
| CN104517669A (en) * | 2014-12-25 | 2015-04-15 | 常州市瑞福汽车部件有限公司 | Cable capable of resisting strain cracking |
| CN204315262U (en) * | 2014-12-26 | 2015-05-06 | 江苏昌盛电缆集团有限公司 | Anti-internal stress fission cable |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |
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| RJ01 | Rejection of invention patent application after publication |