CN203013301U - Stable resistance cable - Google Patents
Stable resistance cable Download PDFInfo
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- CN203013301U CN203013301U CN 201220725394 CN201220725394U CN203013301U CN 203013301 U CN203013301 U CN 203013301U CN 201220725394 CN201220725394 CN 201220725394 CN 201220725394 U CN201220725394 U CN 201220725394U CN 203013301 U CN203013301 U CN 203013301U
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- cable
- resistance
- temperature
- composite conducting
- conducting core
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Abstract
The utility model discloses a stable resistance cable which is characterized in that the cable is composed of a composite conductor wire core, an insulating layer coated outside the composite conductor wire core, a braided shield layer coated outside the insulating layer and an outer sheath coated outside the braided shield layer; the composite conductor wire core is formed by compounding and twisting metal wires having resistance value increasing with the rising of the temperature and metal wires having resistance value decreasing with the rising of the temperature; and the resistance value of the composite conductor wire core remains constant during the working process of the stable resistance cable. When the product provided by the utility model is used, resistance change of the conductor having resistivity increasing with the rising of the temperature in the composite conductor wire core equals to resistance change of the conductor having resistivity decreasing with the rising of the temperature, thus guaranteeing resistance stability of the cable during the working process and ensuring transmission quality and stability.
Description
Technical field
The utility model belongs to electric wire, relates to a kind of steady resistance cable.Should be used as power supply, communication cable by steady resistance cable, can keep in the course of the work the stable of electric wire resistance value, 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, when cross-sectional area, the length of conductor is identical, and the material difference of conductor, resistance sizes difference.The rising of the electrical resistance temperature of most metals material and increasing, as (reference GB/T 3953-2009, GB/T 3955-2009) such as copper cash, aluminum steels, but also there are the materials such as high-resistance electrothermic alloy line to descend on the contrary along with the rising of temperature, as (reference GB/T 1234-1995) such as nichrome, Cr-Al alloys.
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 that contains coating and various Cu alloy materials etc.When using annealed copper wire, aluminum steel etc. as cable conductor separately, transmission performance is more superior, it is also the normal material used, but at precision instrument or while having special purpose etc. to use in to the product of having relatively high expectations, often can have influence on the stability of signal transmission because of the variation of self and ambient temperature, be in particular in the decline of the performance index such as attenuation constant and characteristic impedance; And do not reach the required conduction power supply of cable and the purpose of signal while using separately the materials such as nichrome, Cr-Al alloy as conductor.The cable of for example powering, the increase of resistance value will make to diminish for induced current, will affect the stability of system works; For signal cable, the increase of resistance value will make the increase of cable attenuation, will affect the stable and quality of signal transmission.Therefore, for transmission quality and the very high system of stability requirement, surely hinder cable and have great importance.
Summary of the invention
The purpose of this utility model is intended to overcome above-mentioned deficiency of the prior art, and the impact that provides a kind of resistance value of cable in the course of the work not to be subject to working temperature can keep the steady resistance cable of transmission quality stability.
Content of the present utility model is: a kind of steady resistance cable is characterized in that: by the composite conducting core, be coated on the outer insulating barrier (3) of composite conducting core, be coated on the outer woven shield (4) of insulating barrier (3) and be coated on the outer oversheath (5) of woven shield (4) and form.
In content of the present utility model: described composite conducting core consists of the metal wire raise with temperature rising resistance value (or claim resistivity) and the compound strand system of metal wire that descends with temperature rising resistance value (or claiming resistivity), the resistance value of this composite conducting core keeps constant or substantially constant in the described steady resistance cable course of work, and 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 utility model: it is 0.30mm that described composite conducting core is preferably by 1 cross-sectional area (radial section that is metal wire is long-pending, rear same)
2copper cash (1) and 56 cross-sectional areas be 0.30mm
2the compound strand system of Cr-Al alloy line (2) form.The resistivity of copper cash in the time of 20 ℃ is 1.7 * 10
-8Ω
.m, the resistivity of Cr-Al alloy in the time of 20 ℃ is 1.5 * 10
-6Ω
.m, by the temperature variant formula ρ=ρ of resistivity
0(1+ α t), show that by the temperature coefficient of resistance substitution formula of various materials both balanced proportions are 1:56, can reach the constant of resistance value.
Composite conducting core described in the utility model adopts the compound strand system of multiply metal wire to form, and adopts (resistance value raises and becomes large material with temperature) (referring to GB/T 3953-2009, GB/T 3955-2009) and multiply nichrome, the Cr-Al alloys etc. such as strand copper wire, aluminum steel (material that resistance value raises and reduces on the contrary with temperature) (referring to GB/T 1234-1995) compound 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 lines are that the temperature coefficient of resistance by various materials calculates, be that the working temperature fluctuating range is in certain temperature range when (in the natural environment temperature range, be that the temperature fluctuation amplitude is in tens degrees centigrade of scopes), utilization has the complementary characteristic of the material of contrary rule, make the stable cable of resistance value, can guarantee transmission quality and stability.
In content of the present utility model: described insulating barrier (3) can be plastics or rubber insulation.
In content of the present utility model: described woven shield (4) can be the woven shield of metal wire braiding.
In content of the present utility model: described oversheath (5) can be plastics or rubber outer protection cover.
Compared with prior art, the utlity model has following characteristics and beneficial effect:
(1) adopt the utility model, the composite conducting core is to raise and the combination of the various metals line that descends with temperature rising resistivity with temperature rising resistivity, the working temperature fluctuating range is within the specific limits when (the temperature fluctuation amplitude is in tens degrees centigrade of scopes) (in the natural environment temperature range), the resistance change of the conductor raise with temperature rising resistivity equals the resistance change with the conductor of temperature rising resistivity decline, form complementary the counteracting, the resistance value of composite conducting core is not subject to the impact of working temperature in the described steady resistance cable course of work, and keep constant or substantially constant,
(2) adopt structure described in the utility model and material, can guarantee the job requirement of cable, by adopting the utility model composite conducting core structure, in the time of can effectively guaranteeing cable work, 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 utility model and insulating barrier can adopt various plastics or the rubber that meets job requirement, and woven shield can adopt satisfactory various metal wire; Product preparation process is simple, and cost is low, practical;
The accompanying drawing explanation
Fig. 1 is the utility model example structure schematic diagram;
Fig. 2 is the cross-sectional structure schematic diagram that the utility model embodiment amplifies.
In figure: 1-copper cash (copper conductor), 2-Cr-Al alloy line, 3-insulating barrier, 4-woven shield, 5-oversheath.
Embodiment
Embodiment given below intends so that the utility model is described in further detail; but can not be interpreted as it is the restriction to the utility model protection range; some nonessential improvement and adjustment that the person skilled in art makes the utility model according to above-mentioned content of the present utility model, still belong to protection range of the present utility model.
Embodiment 1: referring to attached Fig. 1 and 2.
A kind of steady resistance cable, by the composite conducting core, be coated on the outer insulating barrier 3 of composite conducting core, be coated on the outer woven shield 4 of insulating barrier 3 and be coated on woven shield 4 outer oversheaths 5 and form.
The production process that this embodiment surely hinders cable is: many metal group zygonema strand is made to the composite conducting core, extrude plastic insulating layer 3 on the composite conducting core, again with extruding oversheath 5 protective layers after metal wire woven shield 4, make steady resistance cable product.
Embodiment 2:
A kind of steady resistance cable is characterized in that: by the composite conducting core, be coated on the outer insulating barrier 3 of composite conducting core, be coated on the outer woven shield 4 of insulating barrier 3 and be coated on woven shield 4 outer oversheaths 5 and form;
Described composite conducting core consists of the metal wire raise with temperature rising resistance value (or claim resistivity) and the compound strand system of metal wire that descends with temperature rising resistance value (or claiming resistivity), 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 (radial section that is metal wire is long-pending, rear same)
2copper cash 1 and 56 cross-sectional areas be 0.30mm
2the compound strand system of Cr-Al alloy line 2 form.The resistivity of copper cash in the time of 20 ℃ is 1.7 * 10
-8Ω
.m, the resistivity of Cr-Al alloy in the time of 20 ℃ is 1.5 * 10
-6Ω
.m, by the temperature variant formula ρ=ρ of resistivity
0(1+ α t), show that by the temperature coefficient of resistance substitution formula of various materials both balanced proportions are 1:56, can reach the constant of resistance value.
The production process of the steady resistance cable of this embodiment 2 is: 1 copper cash 1 and 56 compound strand systems of Cr-Al alloy line 2 are made to the composite conducting core; extrude plastic insulating layer 3 on the composite conducting core, again with extruding oversheath 5 protective layers after metal wire woven shield 4, make steady resistance cable product.
In the utility model above-described embodiment: described insulating barrier 3 is plastics or rubber insulation.
In the utility model above-described embodiment: described woven shield 4 is woven shields of metal wire braiding.
In the utility model above-described embodiment: described oversheath 5 is plastics or rubber outer protection cover.
In the utility model above-described embodiment: adopt the compound strand system of various metals line, due to the intensity difference of various metals, twist when processed roundness and the regularity that need to guarantee conductor wire core.
The utility model is not limited to above-described embodiment, and the utility model content is described all can implement and have described good result.
Claims (6)
1. a steady resistance cable is characterized in that: by the composite conducting core, be coated on the outer insulating barrier (3) of composite conducting core, be coated on the outer woven shield (4) of insulating barrier (3) and be coated on the outer oversheath (5) of woven shield (4) and form.
2. by steady resistance cable claimed in claim 1, it is characterized in that: described composite conducting core consists of the metal wire raise with temperature rising resistance value and the compound strand system of metal wire that descends with temperature rising resistance value, and it is constant that the resistance value of this composite conducting core keeps in the described steady resistance cable course of work.
3. by steady resistance cable claimed in claim 2, 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
2the compound strand system of Cr-Al alloy line (2) form.
4. by claim 1,2 or 3 described steady resistance cables, it is characterized in that: described insulating barrier (3) is plastics or rubber insulation.
5. by claim 1,2 or 3 described steady resistance cables, it is characterized in that: described woven shield (4) is the woven shield of metal wire braiding.
6. by claim 1,2 or 3 described steady resistance cables, 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 |
|---|---|---|---|
| CN 201220725394 CN203013301U (en) | 2012-12-26 | 2012-12-26 | Stable resistance cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220725394 CN203013301U (en) | 2012-12-26 | 2012-12-26 | Stable resistance cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203013301U true CN203013301U (en) | 2013-06-19 |
Family
ID=48604868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220725394 Expired - Fee Related CN203013301U (en) | 2012-12-26 | 2012-12-26 | Stable resistance cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203013301U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103093867A (en) * | 2012-12-26 | 2013-05-08 | 四川九洲线缆有限责任公司 | Resistance stabilizing cable |
-
2012
- 2012-12-26 CN CN 201220725394 patent/CN203013301U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103093867A (en) * | 2012-12-26 | 2013-05-08 | 四川九洲线缆有限责任公司 | Resistance stabilizing cable |
| CN103093867B (en) * | 2012-12-26 | 2015-06-17 | 四川九洲线缆有限责任公司 | Resistance stabilizing cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20151226 |
|
| EXPY | Termination of patent right or utility model |