CN103956212A - Sheath low-retraction cable for rail transit - Google Patents
Sheath low-retraction cable for rail transit Download PDFInfo
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- CN103956212A CN103956212A CN201410131036.3A CN201410131036A CN103956212A CN 103956212 A CN103956212 A CN 103956212A CN 201410131036 A CN201410131036 A CN 201410131036A CN 103956212 A CN103956212 A CN 103956212A
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- layer
- sheath
- cable
- shielding layer
- shielding
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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 invention discloses a sheath low-retraction cable for rail transit. The cable comprises a conductor, a conductor shielding layer, an insulation layer, an insulation shielding layer, a copper wire shielding layer, a waterproof layer and an armor layer, wherein the conductor is sleeved with the conductor shielding layer, the insulation layer, the insulation shielding layer, the copper wire shielding layer, the waterproof layer and the armor layer in sequence from inside to outside. A friction increasing and retraction resisting layer formed by extruding thermoplastic materials is additionally arranged between the insulation shielding layer and the waterproof layer, so that shielding copper wires wrapped in a spiral shape at intervals are embedded into the friction increasing and retraction resisting layer to be a whole, the shielding function of the copper wire layer is not affected, the friction force between the copper wires and the surface of the insulation shielding layer of the cable is increased greatly, the sliding frequency of a sheath of the cable on the copper wire shielding layer is reduced, and therefore the retraction of the sheath of the cable is reduced when temperature changes.
Description
Technical field
The invention belongs to cable technology field, be specifically related to the low retraction cable of a kind of sheath of using for urban track traffic.
Background technology
As an important component part of urban public tranlport system, urban track traffic at present has the polytypes such as subway, light rail, suburban railway, tramcar and aerotrain.Along with delivery a surname at full speed of China's economy and the quickening of urbanization process, urban track traffic industry enters great development period, also increasing for the use total amount of the electric wire of urban track traffic.Current track hands over universal cordage from the viewpoint of reducing loss and the injury to personnel of fire, all requires cable to have low-smoke non-halogen flame-retardant characteristic.In order to make cable can bear larger short circuit current, require to adopt brass wire shielding, while adopting brass wire shielding, copper wire and insulation shield layer skin-friction force are less.Simultaneously in order to make cable reach the fire-retardant rank of category-A, sheath need be used a large amount of low smoke and zero halogen organic materials, these organic materials can produce shrinkage stress when variations in temperature, thereby cause cable sheath at brass wire shielding place, to occur to slide and generation contraction, to cable, use and bring adverse effect.
Summary of the invention
The object of the invention is to for deficiency of the prior art, provide a kind of sheath for urban track traffic low retraction cable, effectively to reduce the contraction of cable sheath.
The object of the present invention is achieved like this:
The low retraction cable of sheath for a kind of track traffic, comprise conductor, conductor shield, insulating barrier, insulation screen, shielding layer of copper wires, watertight composition, armour, it is characterized in that: on described conductor, be arranged with successively from inside to outside conductor shield, insulating barrier, insulation screen, shielding layer of copper wires, watertight composition, armour.
Wherein, described shielding layer of copper wires is helical form intermittence lapping structure.
Wherein, in order to increase the frictional force between shielding layer of copper wires and insulation screen surface, can in the space of described shielding layer of copper wires, fill out and apply the increasing frictional resistance contracting layer that one deck is made by thermoplastic.
Wherein, in the outside of described armour, be socketed with sheath.
Compared with prior art, tool of the present invention has the following advantages:
The present invention is between insulation screen and watertight composition, the increasing frictional resistance contracting layer that adopts thermoplastic to extrude has been set up in design, the wrapped shielding copper wire of helical form intermittence is embedded to be increased frictional resistance contracting layer and becomes as a whole, not only can not affect the shielding action of copper wire layer, and greatly increased the frictional force on copper wire and insulation shield layer surface, reduce the slip of cable sheath at shielding layer of copper wires place, thereby reduced the contraction of cable sheath when variations in temperature.
Accompanying drawing explanation
Fig. 1 is the structural representation of the low retraction cable of sheath for track traffic of the present invention.
In figure: 1-sheath, 2-armour, 3-watertight composition, 4-increases frictional resistance contracting layer, 5-shielding layer of copper wires, 6-insulation screen, 7-insulating barrier, 8-conductor shield, 9-conductor.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is illustrated, it should be noted that specific embodiment is limited the present invention never in any form, any change or the replacement according to the teachings of the present invention done, all belong to protection scope of the present invention.
Embodiment 1
As shown in Figure 1, the low retraction cable of sheath for track traffic described in the present embodiment, comprise armour 2, watertight composition 3, shielding layer of copper wires 5, insulation screen 6, insulating barrier 7, conductor shield 8 and conductor 9, on described conductor 9, be arranged with successively from inside to outside conductor shield 8, insulating barrier 7, insulation screen 6, shielding layer of copper wires 5, watertight composition 3 and armour 2.Wherein, described shielding layer of copper wires 5 is helical form intermittence lapping structure, in order to increase the frictional force between shielding layer of copper wires 5 and insulation screen 6 surfaces, can in the space of described shielding layer of copper wires 5, fill out and apply the increasing frictional resistance contracting layer 4 that one deck is made by thermoplastic.Meanwhile, in the outside of described armour 2, be socketed with sheath 1.
The present invention is between insulation screen and watertight composition, the increasing frictional resistance contracting layer that adopts thermoplastic to extrude has been set up in design, the wrapped shielding copper mesh of helical form intermittence is embedded to be increased frictional resistance contracting layer and becomes as a whole, not only can not affect the shielding action of copper wire layer, and greatly increased the frictional force on copper wire layer and insulation shield layer surface, reduce the slip of cable sheath at shielding layer of copper wires place, thereby reduced the contraction of cable sheath when variations in temperature.
Application Example 1 be take 35KV track traffic cable and is contrasted as example
35KV track traffic cable originally, conductor adopts that conventional electric power cable uses has circular twisted copper conductors of pressing of excellent electric conductivity, conductor screen, insulation and insulation shielding employing electric durability energy are good, the cross-linking polyethylene materials of high purity, shielding copper wire adopts annealing electrician round copper wire, watertight composition and sheath adopt the polyolefin organic material simultaneously with low smoke and zero halogen and superior fire resistance, and armour adopts sheet metal strip.Brass wire shielding is with helical form gap sex comb around insulation shield surface, and outside adds one deck tape banding, and copper wire and insulation shield surface are the frictions of line and face, and frictional force is less, and position is fixing, can slide easily.Cable waterproof layer, sheath adopt low smoke and zero halogen organic fire-resisting material, for reaching the fire-retardant requirement of category-A, cable waterproof layer and sheath amount ratio are larger, when temperature changes, cable sheath shrinkage stress is larger, at copper wire place, produce and slide, thereby easily cause cable sheath to produce, shrink, general shrinkage is 2-4%.
The cable of the present invention's design, between insulation screen 6 and watertight composition 3, designed the increasing frictional resistance contracting layer 4 of one deck low-smoke bittern-free highly fire-proof thermoplastic extrusion, can make the wrapped shielding copper wire of helical form intermittence embed 4 one-tenth, increasing frictional resistance contracting layer as a whole, greatly increased the frictional force on copper wire and insulation shield surface, reduced the slip of cable sheath at brass wire shielding place, thereby limited the contraction of cable sheath organic material when temperature changes, significantly reduced the contraction of cable sheath.When temperature changes, the cable sheath shrinkage of the present invention's design is less than 0.1%.Than original cable sheath, shrink and significantly reduce.
Application Example 2
The 35KV1X150 track traffic looped network cable that adopts the present invention to manufacture, increasing frictional resistance contracting layer 4 adopts low-smoke bittern-free highly fire-proof cable material of polyolefin to extrude, extrude thickness and be about 1.1mm, diameter 0.97mm, the shielding copper wire of 46 are wrapped in and are increased in frictional resistance contracting layer 4, then at brass wire shielding, apply the watertight composition 3 identical with original track traffic cable, armour 2 and sheath 1 outward.Owing to having designed increasing frictional resistance contracting layer 4, copper wire and increasing frictional resistance contracting layer have formed an integral body, make shielding layer of copper wires become face contact with the line contact contacting by 46 copper wires on insulation shielding surface, have enlarged markedly friction area, thereby have increased frictional force.In increasing friction force, 46 copper wires all embed and increase in the middle of frictional resistance contracting layer, and the thermoplasticity CABLE MATERIALS that is increased frictional resistance contracting layer is wrapped up, and makes copper wire can not produce slip, thus the strong contraction that has limited cable sheath when temperature changes.This specification cable is through sampling test, and sheath shrinkage is only 0.05%.
Claims (4)
1. the low retraction cable of sheath for track traffic, comprise conductor, conductor shield, insulating barrier, insulation screen, shielding layer of copper wires, watertight composition, armour, it is characterized in that: on described conductor, be arranged with successively from inside to outside conductor shield, insulating barrier, insulation screen, shielding layer of copper wires, watertight composition, armour.
2. according to the low retraction cable of sheath for track traffic under claim 1, it is characterized in that: described shielding layer of copper wires is helical form intermittence lapping structure.
3. according to the low retraction cable of sheath for track traffic under claim 1, it is characterized in that: in the space of described shielding layer of copper wires, fill out and apply the increasing frictional resistance contracting layer that one deck is made by thermoplastic.
4. according to the low retraction cable of sheath for track traffic under claim 1, it is characterized in that: the outside at described armour is socketed with sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410131036.3A CN103956212A (en) | 2014-04-02 | 2014-04-02 | Sheath low-retraction cable for rail transit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410131036.3A CN103956212A (en) | 2014-04-02 | 2014-04-02 | Sheath low-retraction cable for rail transit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103956212A true CN103956212A (en) | 2014-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410131036.3A Pending CN103956212A (en) | 2014-04-02 | 2014-04-02 | Sheath low-retraction cable for rail transit |
Country Status (1)
| Country | Link |
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| CN (1) | CN103956212A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112017809A (en) * | 2020-08-28 | 2020-12-01 | 安徽国信电缆科技股份有限公司 | Cross-linked polyethylene insulation low-smoke halogen-free fire-resistant power cable |
Citations (7)
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|---|---|---|---|---|
| CN1412589A (en) * | 2001-10-18 | 2003-04-23 | 住友电气工业株式会社 | Fibre-optical cable |
| CN2554641Y (en) * | 2002-04-19 | 2003-06-04 | 山东省太平洋光缆有限公司 | Unshrink communication optical cable |
| CN201117342Y (en) * | 2007-09-04 | 2008-09-17 | 天津塑力线缆集团有限公司 | Halogen-free low smoke environment-friendly cable structure |
| US20090200059A1 (en) * | 2005-07-15 | 2009-08-13 | Paul Cinquemani | Cable Having Expanded, Strippable Jacket |
| CN202275657U (en) * | 2011-10-08 | 2012-06-13 | 江苏亨通电力电缆有限公司 | Electrified railway 27.5kV single phase alternating current ethylene-propylene insulating cable |
| CN203250570U (en) * | 2013-03-28 | 2013-10-23 | 河南恒天特种电缆有限公司 | 27.5 kV low-smoke zero-halogen waterproof cable special for railways |
| CN203966630U (en) * | 2014-04-02 | 2014-11-26 | 昆明电缆集团股份有限公司 | The low retraction cable of sheath for a kind of track traffic |
-
2014
- 2014-04-02 CN CN201410131036.3A patent/CN103956212A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1412589A (en) * | 2001-10-18 | 2003-04-23 | 住友电气工业株式会社 | Fibre-optical cable |
| CN2554641Y (en) * | 2002-04-19 | 2003-06-04 | 山东省太平洋光缆有限公司 | Unshrink communication optical cable |
| US20090200059A1 (en) * | 2005-07-15 | 2009-08-13 | Paul Cinquemani | Cable Having Expanded, Strippable Jacket |
| CN201117342Y (en) * | 2007-09-04 | 2008-09-17 | 天津塑力线缆集团有限公司 | Halogen-free low smoke environment-friendly cable structure |
| CN202275657U (en) * | 2011-10-08 | 2012-06-13 | 江苏亨通电力电缆有限公司 | Electrified railway 27.5kV single phase alternating current ethylene-propylene insulating cable |
| CN203250570U (en) * | 2013-03-28 | 2013-10-23 | 河南恒天特种电缆有限公司 | 27.5 kV low-smoke zero-halogen waterproof cable special for railways |
| CN203966630U (en) * | 2014-04-02 | 2014-11-26 | 昆明电缆集团股份有限公司 | The low retraction cable of sheath for a kind of track traffic |
Non-Patent Citations (1)
| Title |
|---|
| 宋志佗等: "一种架空光缆松套管和护层的伸缩现象探讨", 《光纤与电缆及其应用》, no. 6, 31 December 2006 (2006-12-31) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112017809A (en) * | 2020-08-28 | 2020-12-01 | 安徽国信电缆科技股份有限公司 | Cross-linked polyethylene insulation low-smoke halogen-free fire-resistant power cable |
| CN112017809B (en) * | 2020-08-28 | 2022-05-10 | 安徽国信电缆科技股份有限公司 | Cross-linked polyethylene insulated low-smoke halogen-free fire-resistant power cable |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20140730 |