CN103093867B - Resistance stabilizing cable - Google Patents
Resistance stabilizing cable Download PDFInfo
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- CN103093867B CN103093867B CN201210571480.8A CN201210571480A CN103093867B CN 103093867 B CN103093867 B CN 103093867B CN 201210571480 A CN201210571480 A CN 201210571480A CN 103093867 B CN103093867 B CN 103093867B
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Abstract
The invention discloses a resistance stabilizing cable which is characterized by being composed of a composite conductor wire core, an insulation layer coated outside the composite conductor wire core, a woven shielding layer coated outside the insulation layer and an outer sheath coated outside the woven shielding layer. The composite conductor wire core is formed by compositing and twisting metal lines, wherein the resistance of one metal wire can rise along with temperature rise, and the resistance of the other metal wire can decrease along with temperature rise. The resistance of the composite conductor wire core is constant in a work process of the resistance stabilizing cable. When the resistance stabilizing cable is used, the resistance change of a conductor with the resistivity increasing along with temperature rise is equal to the resistance change of a conductor with the resistivity decreasing along with temperature rise. Thus, the resistance can be stable in a work process of the cable, and transmission quality and stability are guaranteed.
Description
Technical field
The invention belongs to electric wire, relate to one and surely hinder cable.This surely resistance cable be used as power supply, communication cable, the stable of electric wire resistance value can be kept in the course of the work, be specially adapted to highly sophisticated device and special occasions etc. to transmission power supply and the higher system of semaphore request.
Background technology
Usually, the size of the resistance of electric wire and material, temperature, length, cross-sectional area have relation, and when the cross-sectional area of conductor, length are identical, the material of conductor is different, and resistance sizes is different.The rising of the electrical resistance temperature of most metals material and increasing, as copper cash, aluminum steel etc. (reference GB/T 3953-2009, GB/T 3955-2009), but also there are the materials such as high-resistance electrothermic alloy line to decline on the contrary along with the rising of temperature, as nichrome, Cr-Al alloy etc. (reference GB/T 1234-1995).
In prior art, the conductor that wires and cables industry adopts is generally annealed copper wire, aluminum steel, the copper cash containing coating, the aluminum steel containing coating and various Cu alloy materials etc.When being used alone annealed copper wire, aluminum steel etc. as cable conductor, transmission performance is more superior, also be the normal material used, but at precision instrument or have special purpose etc. to when requiring to use in higher product, normal meeting has influence on the stability of Signal transmissions because of the change of self and ambient temperature, be in particular in the decline of the performance index such as attenuation constant and characteristic impedance; And be used alone the object of the material such as nichrome, Cr-Al alloy as the conduction power supply do not reached during conductor needed for cable and signal.The cable of such as powering, the increase of resistance value will make supply electric current diminish, will the stability of influential system work; For signal cable, the increase of resistance value will make the increase of cable attenuation, will affect the stable of Signal transmissions and quality.Therefore, for transmission quality and the very high system of stability requirement, steady resistance cable has great importance.
Summary of the invention
Object of the present invention is intended to overcome above-mentioned deficiency of the prior art, provide a kind of can the resistance value of cable in the course of the work by the impact of working temperature, the steady resistance cable of transmission quality stability can be kept.
Content of the present invention is: one surely hinders cable, it is characterized in that: by composite conducting core, the insulating barrier (3) be coated on outside composite conducting core, be coated on insulating barrier (3) woven shield outward (4) and be coated on woven shield (4) oversheath outward (5) and form.
In content of the present invention: described composite conducting core is formed by raising metal wire that resistance value (or claim resistivity) raises with temperature and raising with temperature the metal wire compound system of twisting that resistance value (or claiming resistivity) declines, the resistance value of this composite conducting core keeps constant or substantially constant in the described steady resistance cable course of work, and namely the resistance value of this composite conducting core is not subject to the impact of working temperature and keeps constant or substantially constant in the described steady resistance cable course of work.
In content of the present invention: it is 0.30mm that described composite conducting core is preferably by 1 cross-sectional area (namely the radial section of metal wire amasss, rear same)
2copper cash (1) and 56 cross-sectional areas be 0.30mm
2cr-Al alloy line (2) compound strand system form.The resistivity of copper cash 20 DEG C time is 1.7 × 10
-8Ω
.m, the resistivity of Cr-Al alloy 20 DEG C time is 1.5 × 10
-6Ω
.m, by the temperature variant formula ρ=ρ of resistivity
0(1+ α t), substitutes into formula by the temperature coefficient of resistance of various material and show that both balanced proportions are 1:56, namely can reach the constant of resistance value.
Composite conducting core of the present invention adopts multiply metal wire compound strand system to form, and namely adopts strand copper wire, aluminum steel etc. (resistance value raises with temperature and becomes large material) (resistance value raises the material reduced on the contrary with temperature) (see the GB/T 1234-1995) compound such as (see GB/T 3953-2009, GB/T 3955-2009) and multiply nichrome, Cr-Al alloy strand system to form; The composition of composite conducting core can be combined by two or more metal wires, the species number of metal wire and the quantity of various line are calculated by the temperature coefficient of resistance of various material, namely operating. temperature fluctuations amplitude is in certain temperature range time (in natural environment temperature range, i.e. temperature fluctuation amplitude in tens degree Celsius range), utilize the complementary characteristic with the material of contrary rule, make the stable cable of resistance value, transmission quality and stability can be guaranteed.
In content of the present invention: described insulating barrier (3) can be plastics or rubber insulation.
In content of the present invention: described woven shield (4) can be the woven shield of metal wire braiding.
In content of the present invention: described oversheath (5) can be plastics or rubber outer protection cover.
Compared with prior art, the present invention has features and beneficial effect:
(1) the present invention is adopted, composite conducting core is raise with temperature the combination that resistivity raised and raised with temperature the various metals line of resistivity decline, operating. temperature fluctuations amplitude within the specific limits (temperature fluctuation amplitude is in tens degree Celsius range) (in natural environment temperature range) time, the resistance change raising the conductor of resistivity rising with temperature equals the resistance change raising the conductor that resistivity declines with temperature, form complementary counteracting, the impact of resistance value not by working temperature in the described steady resistance cable course of work of composite conducting core, and keep constant or substantially constant,
(2) structure of the present invention and material is adopted, the job requirement of cable can be ensured, by adopting composite conducting core structure of the present invention, when effectively can ensure that cable works, cable resistance is stable, guarantees stability and the reliability of the transmission quality (transmission quality comprises the indexs such as attenuation constant, far-end crosstalk attentuation, near-end crosstalk defend degree) of system; ;
(3) oversheath in the present invention and insulating barrier can adopt the various plastics or rubber that meet job requirement, and woven shield can adopt satisfactory various metal wire; Product preparation process is simple, and cost is low, practical;
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention structural representation;
Fig. 2 is the cross-sectional structure schematic diagram that the embodiment of the present invention is amplified.
In figure: 1-copper cash (copper conductor), 2-Cr-Al alloy line, 3-insulating barrier, 4-woven shield, 5-oversheath.
Embodiment
Embodiment given below is intended so that the invention will be further described; but can not be interpreted as it is limiting the scope of the invention; some nonessential improvement and adjustment that person skilled in art makes the present invention according to the content of the invention described above, still belong to protection scope of the present invention.
Embodiment 1: see attached Fig. 1 and 2.
One surely hinders cable, by composite conducting core, the insulating barrier 3 be coated on outside composite conducting core, is coated on the woven shield 4 outside insulating barrier 3 and the oversheath 5 be coated on outside woven shield 4 forms.
The production process that this embodiment surely hinders cable is: by obtained for many metallic combinations line strand composite conducting core, composite conducting core extrudes plastic insulating layer 3, again with extruding oversheath 5 protective layer after metal wire woven shield 4, namely obtaining and surely hindering cable product.
Embodiment 2:
One surely hinders cable, it is characterized in that: by composite conducting core, the insulating barrier 3 be coated on outside composite conducting core, be coated on the woven shield 4 outside insulating barrier 3 and the oversheath 5 be coated on outside woven shield 4 forms;
Described composite conducting core is formed by raising metal wire that resistance value (or claim resistivity) raises with temperature and raising with temperature the metal wire compound system of twisting that resistance value (or claiming resistivity) declines, and the resistance value of this composite conducting core keeps constant or substantially constant in the described steady resistance cable course of work;
Described composite conducting core is 0.30mm by 1 cross-sectional area (namely the radial section of metal wire amasss, rear same)
2copper cash 1 and 56 cross-sectional areas be 0.30mm
2cr-Al alloy line 2 compound strand system form.The resistivity of copper cash 20 DEG C time is 1.7 × 10
-8Ω
.m, the resistivity of Cr-Al alloy 20 DEG C time is 1.5 × 10
-6Ω
.m, by the temperature variant formula ρ=ρ of resistivity
0(1+ α t), substitutes into formula by the temperature coefficient of resistance of various material and show that both balanced proportions are 1:56, namely can reach the constant of resistance value.
The production process that this embodiment 2 surely hinders cable is: by 1 copper cash 1 and 56 obtained composite conducting cores of Cr-Al alloy line 2 compounds strand system; composite conducting core extrudes plastic insulating layer 3, again with extruding oversheath 5 protective layer after metal wire woven shield 4, namely obtaining and surely hindering cable product.
In the above embodiment of the present invention: described insulating barrier 3 is plastics or rubber insulation.
In the above embodiment of the present invention: described woven shield 4 is woven shields of metal wire braiding.
In the above embodiment of the present invention: described oversheath 5 is plastics or rubber outer protection cover.
In the above embodiment of the present invention: adopt various metals line compound strand system, because the intensity of various metal is different, need roundness and the regularity of guaranteeing conductor wire core when twisting processed.
The invention is not restricted to above-described embodiment, all can implement described in content of the present invention and there is described good result.
Claims (5)
1. surely hinder a cable, it is characterized in that: by composite conducting core, the insulating barrier (3) be coated on outside composite conducting core, be coated on insulating barrier (3) woven shield outward (4) and be coated on woven shield (4) oversheath outward (5) and form;
Described composite conducting core is by raising the metal wire of resistance value rising with temperature and forming, by the temperature variant formula ρ=ρ of resistivity with the metal wire compound system of twisting that temperature rising resistance value declines
0(1+ α t), substitutes into the temperature coefficient of resistance of various material the balanced proportions that formula draws both cross-sectional areas, thus reaches the constant of resistance value.
2., by steady resistance cable according to claim 1, it is characterized in that: described composite conducting core is 0.30mm by 1 cross-sectional area
2copper cash (1) and 56 cross-sectional areas be 0.30mm
2cr-Al alloy line (2) compound strand system form.
3., by the steady resistance cable described in claim 1 or 2, it is characterized in that: described insulating barrier (3) is plastics or rubber insulation.
4. by the steady resistance cable described in claim 1 or 2, it is characterized in that: described woven shield (4) is the woven shield of metal wire braiding.
5., by the steady resistance cable described in claim 1 or 2, it is characterized in that: described oversheath (5) is plastics or rubber outer protection cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210571480.8A CN103093867B (en) | 2012-12-26 | 2012-12-26 | Resistance stabilizing cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210571480.8A CN103093867B (en) | 2012-12-26 | 2012-12-26 | Resistance stabilizing cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103093867A CN103093867A (en) | 2013-05-08 |
| CN103093867B true CN103093867B (en) | 2015-06-17 |
Family
ID=48206338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210571480.8A Active CN103093867B (en) | 2012-12-26 | 2012-12-26 | Resistance stabilizing cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103093867B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5209987A (en) * | 1983-07-08 | 1993-05-11 | Raychem Limited | Wire and cable |
| CN2718740Y (en) * | 2004-07-22 | 2005-08-17 | 宝胜科技创新股份有限公司 | Electric resistance cable type temperature measuring alarming cable |
| CN101485230A (en) * | 2006-05-17 | 2009-07-15 | 电伴热有限公司 | Material and heating cable |
| CN202584815U (en) * | 2012-04-05 | 2012-12-05 | 辽宁金环电缆有限公司 | Compensation lead used for thermocouple |
| CN203013301U (en) * | 2012-12-26 | 2013-06-19 | 四川九洲线缆有限责任公司 | Stable resistance cable |
-
2012
- 2012-12-26 CN CN201210571480.8A patent/CN103093867B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5209987A (en) * | 1983-07-08 | 1993-05-11 | Raychem Limited | Wire and cable |
| CN2718740Y (en) * | 2004-07-22 | 2005-08-17 | 宝胜科技创新股份有限公司 | Electric resistance cable type temperature measuring alarming cable |
| CN101485230A (en) * | 2006-05-17 | 2009-07-15 | 电伴热有限公司 | Material and heating cable |
| CN202584815U (en) * | 2012-04-05 | 2012-12-05 | 辽宁金环电缆有限公司 | Compensation lead used for thermocouple |
| CN203013301U (en) * | 2012-12-26 | 2013-06-19 | 四川九洲线缆有限责任公司 | Stable resistance cable |
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| Publication number | Publication date |
|---|---|
| CN103093867A (en) | 2013-05-08 |
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