CN103854734B - The sensitive temperature sensing cable of a kind of renewable type - Google Patents
The sensitive temperature sensing cable of a kind of renewable type Download PDFInfo
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- CN103854734B CN103854734B CN201410073310.6A CN201410073310A CN103854734B CN 103854734 B CN103854734 B CN 103854734B CN 201410073310 A CN201410073310 A CN 201410073310A CN 103854734 B CN103854734 B CN 103854734B
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Abstract
The invention discloses the sensitive temperature sensing cable of a kind of renewable type, form cable core by three cores and supporting-core; Each core comprises the wire being positioned at middle part and the insulating barrier being coated on wire outside, and insulating barrier adopts negative temperature coefficient thermistor composition to make; Supporting-core is made up of three metal profile, and the angle between adjacent two metal profile is 120 degree; Three cores are longitudinal between adjacent two metal profile respectively, and each core is near two metal profile be adjacent; In the outside coated one-sided metallic plastics composite band of described cable core, the metal level of described one-sided metallic plastics composite band towards inner plastic layer outwardly; The outside coated inner sheath of one-sided metallic plastics composite band, the outside coated oversheath of inner sheath, is provided with lubricating layer between inner sheath and oversheath.The sensitive temperature sensing cable of renewable type that the present invention proposes, Stability Analysis of Structures, highly sensitive, use safety under overload or hot environment.
Description
Technical field
The present invention relates to field of cable technology, particularly relate to the sensitive temperature sensing cable of a kind of renewable type.
Background technology
Insulation and the sheath material of conventional power cable are generally polyvinyl chloride, cross-linked polyolefin etc., and these materials can be aging rapidly until cable breaks down in cable overload or high temperature occasion etc.Have a most important safety electric flow valuve in cable security, wire rod self-temperature can be caused different because cable load operation produces heat difference, electrical equipment use exceed safe current overload cause temperature rise time, directly cannot judge the safety in utilization of cable fast.
The operation principle of conventional temperature sensing cable is, when ambient temperature raises, and change in resistance between wire, or be short-circuited, realize alarm and export.Conventional temperature sensing cable has following several: (1) utilizes the coaxial temperature sensing cable of negative temperature coefficient (NTC) thermistor, once there be the condition of a fire to occur, negative temperature coefficient (NTC) thermistor material Yin Wendu raises, its resistance changes thereupon, is reported to the police by decoding signals perception resistance; This kind of temperature sensing cable precision on point value is higher, but when length increases, precision can be deteriorated, and influenced by environmental temperaturely easily to report by mistake; The temperature sensing cable of more than (2) the two twisted compositions of heat-sensitive cable, during the generation condition of a fire, thermo-sensitive material melts, and the wire of internal package is short-circuited, and reports to the police; But this kind of temperature sensing cable just must be changed after thermo-sensitive material melts; (3) temperature sensing cable of heat-sensitive cable and the twisted composition of negative temperature coefficient heat-sensitive resistance material, once there be the condition of a fire to occur, negative temperature coefficient (NTC) thermistor material Yin Wendu raises, its resistance changes thereupon, by this change of decoding signals perception, carry out signal conversion, by MICROCOMPUTER PROCESSING, realize fire alarm; Can be there is negative temperature coefficient after melting and mix with thermistor material in thermo-sensitive material, affect its characteristic, the shortcoming must changed after also existing.
These temperature sensing cables, be all rely on insulating barrier to realize temperature-sensitive performance with the change in resistance of temperature, it all has high requirement to heat conductivity and cable sensitivity.In addition, there is the problems such as heating temperature is uneven, response time length, poor sensitivity in the temperature sensing cable of more than two stranded formation.Therefore, how to avoid cable in the place use safety hidden danger of overload, high temperature, realize the thermal response of cable in time rapidly, proterctive equipment is not damaged, is the problem that industry is explored always.
Summary of the invention
In order to solve the technical problem existed in background technology, the present invention proposes the sensitive temperature sensing cable of a kind of renewable type, its Stability Analysis of Structures, highly sensitive, use safety under overload, high temperature or wet environment.
The sensitive temperature sensing cable of a kind of renewable type that the present invention proposes, forms cable core by three cores and supporting-core; Each core comprises the wire being positioned at middle part and the insulating barrier being coated on wire outside, and insulating barrier adopts negative temperature coefficient thermistor composition to make; Supporting-core is made up of three metal profile, and the angle between adjacent two metal profile is 120 degree; Three cores are longitudinal between adjacent two metal profile respectively, and each core is near two metal profile be adjacent; In the outside coated one-sided metallic plastics composite band of described cable core, the metal level of described one-sided metallic plastics composite band towards inner plastic layer outwardly; The outside coated inner sheath of one-sided metallic plastics composite band, the outside coated oversheath of inner sheath, is provided with lubricating layer between inner sheath and oversheath.
Preferably, arc-shaped transition between adjacent two metal profile, core abuts against arc-shaped transition place.
Preferably, supporting-core adopts aluminum metal to make, and the radical length of metal profile is not more than the diameter of core.
Preferably, the end rounding off of metal profile.
Preferably, one-sided metallic plastics composite band adopts one side aluminium-plastic tape to make.
Preferably, lubricating layer adopts thin aluminium powder to make.
Preferably, inner sheath and oversheath all adopt flame-proof polyethylene to make.
In the present invention, adopt the supporting-core be made up of three aluminium supporting brackets, core is longitudinal between adjacent two aluminium supporting brackets respectively, and arc-shaped transition between adjacent two aluminium supporting brackets, core abuts against arc-shaped transition place.When cable works, adopt the insulating barrier that negative temperature coefficient thermistor composition is made, temperature control is high, has higher structural stability and negative temperature coefficient (NTC) effect repeatability, in predetermined temperature range, the electrical resistance temperature between wire is made to rise and reduce rapidly, when temperature reaches set point, be short-circuited fast, when the temperature decreases, insulating barrier between wire minor insulation again, realization can recover temperature-sensitive.Core near aluminium supporting-core and one side aluminium-plastic tape aluminum metal layer inwardly, in cable core, provide thermal conducting path, add the thermocontact area between core, when reaching design temperature, reaction time shortens, and sensitivity improves, and realizes cable and can recover temperature-sensitive performance timely fast.
Enhance the mechanical performance of cable by arranging supporting-core, three cores are longitudinal between two adjacent metal supporting brackets respectively, make the structure of cable more stable.The radical length of each metal profile is all not more than wire core diameter, and each metal profile end rounding off, ensure that cable is at the coating layer made and in use procedure, supporting-core can not destroy outside.In addition, the one-sided metallic plastics composite band that two metal profile that each core is adjacent and cable core are outside wrapped, for each core is formed individually shielded, this can play between shielding core and the effect of external electromagnetic wave interference.Meanwhile, adopt the duplex sheath form of inner sheath and oversheath, and between two sheaths, be provided with thin aluminium powder layer, while outer protection cable core, improve due to supporting-core to arrange caused warping property not enough.
Accompanying drawing explanation
Fig. 1 is the structural representation of the sensitive temperature sensing cable of a kind of renewable type that the present invention proposes.
Embodiment
As shown in Figure 1, Fig. 1 is the structural representation of the sensitive temperature sensing cable of a kind of renewable type that the present invention proposes.
With reference to Fig. 1, the sensitive temperature sensing cable of a kind of renewable type that the present invention proposes, comprises the cable core be made up of three cores 1 and supporting-core 2.
Core 1 inside is wire 11, the outside coated insulation layer 12 of wire 11, and the negative temperature coefficient thermistor composition that insulating barrier 12 adopts is made.Supporting-core 2 is one-body molded by three aluminium supporting brackets, and the angle between adjacent two aluminium supporting brackets is 120 degree, and arc-shaped transition between adjacent two aluminium supporting brackets.This aluminium supporting bracket radical length is not more than the diameter of core 1, and aluminium supporting bracket end rounding off.
Three cores 1 are longitudinal between adjacent two aluminium supporting brackets respectively, and each core 1 abuts against the arc-shaped transition place formation cable core be adjacent between two aluminium supporting brackets.At the outside coated one side aluminium-plastic tape 3 of cable core, inwardly, plastic layer outwardly for the aluminum metal layer of one side aluminium-plastic tape 3.The outside coated inner sheath 4 of one side aluminium-plastic tape 3, the outside coated oversheath 6 of inner sheath 4, inner sheath 4 and oversheath 6 all adopt flame-proof polyethylene to make, and are provided with thin aluminium powder layer 5 between inner sheath 4 and oversheath 6.
In technique scheme, adopt supporting-core 2, three cores 1 be made up of three aluminium supporting brackets longitudinal between adjacent two aluminium supporting brackets respectively, and core 1 abut against the arc-shaped transition place between adjacent two aluminium supporting brackets.When cable works, adopt the insulating barrier 12 that negative temperature coefficient thermistor composition is made, temperature control is high, has higher structural stability and negative temperature coefficient (NTC) effect repeatability, in predetermined temperature range, the electrical resistance temperature between wire 11 is made to rise and reduce rapidly, when temperature reaches set point, be short-circuited fast, when the temperature decreases, insulating barrier 12 minor insulation again between wire 11, realization can recover temperature-sensitive.Because aluminum metal is good conductor, core 1 near aluminium supporting-core 2 and one side aluminium-plastic tape 3 aluminum metal layer inwardly, thermal conducting path is provided in cable core, add the thermocontact area between core 1, for the insulating barrier 12 of core 1 provides good heat conduction via, when cable core reaches design temperature, insulating barrier 12 homogeneous temperature, reaction time shortens, and sensitivity improves, and realizes cable and can recover temperature-sensitive performance timely fast.
Enhance the mechanical performance of cable by arranging supporting-core 2, three cores 1 are longitudinal between two adjacent aluminium supporting brackets respectively, make the structure of cable more stable.The radical length of aluminium supporting bracket is not more than the diameter of core 1, and each metal profile end rounding off, ensure that cable is at the coating layer made and in use procedure, supporting-core 2 can not destroy outside.In addition, the one side aluminium-plastic tape 3 that two aluminium supporting brackets that each core 1 is adjacent and cable core are outside wrapped, for each core 1 is formed individually shielded, this can play between shielding core 1 and the effect of external electromagnetic waves.Meanwhile, adopt the duplex sheath form of inner sheath 4 and oversheath 6, and between two sheaths, be provided with thin aluminium powder layer 5, while protection cable core, improve due to supporting-core 2 to arrange caused warping property not enough.
The negative temperature coefficient thermistor composition that insulating barrier 12 adopts comprises following component by ratio of quality and the number of copies: 100 parts of polyethylene, 2-8 part carbon nano-tube, 1-4 part zinc oxide, 0.5-4 part paraffin, 0-3 part coupling agent, 0-2 part softex kws (CTAB); Particularly, 100 parts of polyethylene, 5 parts of carbon nano-tube, 2 parts of zinc oxide, 3 parts of paraffin, 1 part of coupling agent, 1 part of softex kw.
In the insulating barrier 12 that this thermo-sensitive material is made, carbon nano-tube, as conductive filler, has the advantage that conductivity thermal conductivity is good, adds the anti-corrosion heat-resisting of insulating barrier 12 simultaneously; CTAB makes carbon nano-tube be uniformly distributed in the material, forms the electric heating networking of tight distribution wherein, makes it conduct electricity with heat-conducting effect more outstanding.This negative temperature coefficient thermistor composition temperature control is high, has higher structural stability and NTC effect repeatability.
According to the sensitive temperature sensing cable of renewable type that the present embodiment proposes, different thermo-sensitive materials and temperature-sensing color-changing material can be selected as required, make the sensitive temperature sensing cable of the different renewable type of alarm temperature.After testing, can realize following alarm temperature grade (DEG C): alarm temperature is 70 DEG C, temperature of being failure to actuate is 45 DEG C; Alarm temperature is 85 DEG C, and temperature of being failure to actuate is 60 DEG C; Alarm temperature is 105 DEG C, and temperature of being failure to actuate is 75 DEG C; Alarm temperature is 138 DEG C, and temperature of being failure to actuate is 85 DEG C; Alarm temperature is 180 DEG C, and temperature of being failure to actuate is 108 DEG C, and wherein operating temperature error is ± 10%.
In addition, according to the sensitive temperature sensing cable of the renewable type of the present embodiment after testing, reusable the upper limit temperature of heat tolerance is not less than 1.4 times of operating temperatures in short-term; 30 years useful life under normal circumstances; Plain edition temperature sensing cable external diameter is 3.5mm, and Weaving type temperature sensing cable external diameter is 4.5mm; Plain edition temperature sensing cable weight is 1.5kg/100m; Most high workload ambient temperature is no more than temperature of being failure to actuate; Can bear pulling force is 120N; Insulating barrier is withstand voltage 10KV; Applicable humidity range is less than 85%.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (7)
1. the sensitive temperature sensing cable of renewable type, is characterized in that, forms cable core by three cores (1) and supporting-core (2); Each core (1) comprises the insulating barrier (12) being positioned at inner wire (11) and being coated on wire (11) outside, and insulating barrier (12) adopts negative temperature coefficient thermistor composition to make; Supporting-core (2) is made up of three metal profile, and the angle between adjacent two metal profile is 120 degree; Three cores (1) are longitudinal between adjacent two metal profile respectively, and each core (1) is near two metal profile be adjacent; The outside coated one-sided metallic plastics composite band (3) of described cable core, inwardly, plastic layer outwardly for the metal level of described one-sided metallic plastics composite band (3); The outside coated inner sheath (4) of one-sided metallic plastics composite band (3), the outside coated oversheath (6) of inner sheath (4), is provided with lubricating layer (5) between inner sheath (4) and oversheath (6).
2. the sensitive temperature sensing cable of renewable type according to claim 1, is characterized in that, arc-shaped transition between adjacent two metal profile, core (1) abuts against arc-shaped transition place.
3. the sensitive temperature sensing cable of renewable type according to claim 1, is characterized in that, supporting-core (2) adopts aluminum metal to make, and the radical length of metal profile is not more than the diameter of core (1).
4. the sensitive temperature sensing cable of renewable type according to claim 3, is characterized in that, the end rounding off of metal profile.
5. the sensitive temperature sensing cable of renewable type according to claim 1, is characterized in that, one-sided metallic plastics composite band (3) adopts one side aluminium-plastic tape to make.
6. the sensitive temperature sensing cable of renewable type according to claim 1, is characterized in that, lubricating layer (5) adopts thin aluminium powder to make.
7. the sensitive temperature sensing cable of renewable type according to claim 1, is characterized in that, inner sheath (4) and oversheath (6) all adopt flame-proof polyethylene to make.
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| CN201410073310.6A CN103854734B (en) | 2014-02-28 | 2014-02-28 | The sensitive temperature sensing cable of a kind of renewable type |
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| CN201410073310.6A CN103854734B (en) | 2014-02-28 | 2014-02-28 | The sensitive temperature sensing cable of a kind of renewable type |
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| CN103854734A CN103854734A (en) | 2014-06-11 |
| CN103854734B true CN103854734B (en) | 2016-01-13 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104200912A (en) * | 2014-08-26 | 2014-12-10 | 安徽蓝德集团股份有限公司 | Elastic extrusion-resistant power cable for aviation |
| CN104599767B (en) * | 2014-08-27 | 2017-01-18 | 李静 | Working state displayable cable |
| CN105609191B8 (en) * | 2014-08-27 | 2017-06-20 | 扬州北辰鑫诚电力器材有限公司 | It is a kind of to can be used to display whether in running order cable |
| CN112151209A (en) * | 2020-09-25 | 2020-12-29 | 湖南金缆电工科技有限责任公司 | Novel self-radiating wire cable |
| CN112420264B (en) * | 2020-09-30 | 2022-04-08 | 杭州富通电线电缆有限公司 | Early warning cable |
| CN112466541B (en) * | 2020-09-30 | 2022-07-26 | 杭州富通电线电缆有限公司 | Cable with improved insulation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202013625U (en) * | 2011-04-18 | 2011-10-19 | 李永停 | Restorable temperature-sensing cable |
| CN203826036U (en) * | 2014-02-28 | 2014-09-10 | 安徽复兴电缆集团有限公司 | Recoverable flexible temperature sensing cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070153630A1 (en) * | 2005-12-29 | 2007-07-05 | Alexander Pakhomov | Seismic sensitive cable and a seismic sensitive ribbon for detecting intruders over long lines |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202013625U (en) * | 2011-04-18 | 2011-10-19 | 李永停 | Restorable temperature-sensing cable |
| CN203826036U (en) * | 2014-02-28 | 2014-09-10 | 安徽复兴电缆集团有限公司 | Recoverable flexible temperature sensing cable |
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Effective date of registration: 20211119 Address after: 402760 Qinggang industrial and Trade Zone, Bishan District, Chongqing Patentee after: CHONGQING SHENZHOU CABLE GROUP CO.,LTD. Address before: 238339 Xingou Industrial Zone, Wuwei County, Wuhu City, Anhui Province Patentee before: ANHUI FUXING CABLE GROUP Co.,Ltd. |