CN201754632U - Three-layer shielding electric tracing band - Google Patents
Three-layer shielding electric tracing band Download PDFInfo
- Publication number
- CN201754632U CN201754632U CN2010205044681U CN201020504468U CN201754632U CN 201754632 U CN201754632 U CN 201754632U CN 2010205044681 U CN2010205044681 U CN 2010205044681U CN 201020504468 U CN201020504468 U CN 201020504468U CN 201754632 U CN201754632 U CN 201754632U
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- electric
- shielding
- heating belt
- layers
- electric tracing
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- Expired - Fee Related
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Abstract
The utility model discloses a three layer shielding electric tracing band, comprising two conductor wires, wherein the two conductor wires edtrudingly wraps the medium heating material, an internal insulation protection layer, an aluminum-magnesium alloy braided shield layer and an external insulation sheath are coated out of the heating material in sequence. The electric tracing band of the utility model has the advantages of simple structure, convenient manufacture, good cable strength and shielding performance, and can achieve the required use effect under the case of more fine requirement and more harsh environment.
Description
Technical field
The utility model relates to the accompanying-heat cable field, relates in particular to a kind of three layers of shielding electric-heating belt.
Background technology
Electric-heating belt is a kind of novel high-tech product, and it is since last century, entered application the seventies, and the self-limited type electric-heating belt has become electric-heating belt type the most general in the world today.They can be widely used in that liquid object is carried in pipeline and the anti-freezing and heat-insulating of tank body, keep technological temperature, heating highway, ramp, crossing, eaves and floor etc.The PTC macromolecular material that is distributing and playing heat effect between the self-limited type electric tracing inside, two conductive cores, its outside is made of macromolecule sheath, metallic shield net and macromolecule oversheath.When power connection, inner PTC macromolecular material expanded by heating, resistance become big, reduce heating power, and temperature is reduced; When temperature reduced, ptc material was met cold contraction, and resistance decreasing increases heating power, and temperature is risen, thereby reached the effect of automatic adjusting temperature.
Because as the energising cable, the electromagnetic field that is produced during work can interfere with the external world to electric-heating belt certainly, and when there was strong interference source in the external world, the operational environment of himself will be affected, thereby influences the operate as normal of electric-heating belt.The clamshell that high-permeability material is made is a kind of good electrical magnetic shielding device, can effectively make electromagnetic wave can only be penetrated into the skin of clamshell, can not influence the operate as normal of inside cable.
Because self constructing of electric-heating belt, when energising, two conductive cores can produce galvanomagnetic effect, when particularly working, and variations in temperature, size of current also changes thereupon, according to the oersted test, electromagnetic field also can constantly change, and for some high-precision instruments very big influence is arranged, so must add device, to reach the influence of shield electromagnetic.
The purpose of electromagnetic shielding is to cut off electromagnetic delivering path.Method with electromagnetic shielding solves electromagnetic interference problem.It can guarantee the circuit operate as normal in the electronic equipment, safety that again can support equipment.Present traditional electric-heating belt is for shield electromagnetic, generally be to take between inner sheath and oversheath, add the shielding stratum reticulare of layer of aluminum magnesium alloy braiding, the function that certain absorption and bounce-back can be arranged for electromagnetic wave, in general the screening effectiveness of the gauze screen of present electric-heating belt on the market is within (general commercial the requirement) scope of 25-30DB.But this is strict for some installation environments, and a large amount of highly sophisticated device equipment are arranged in the operational environment, and as power plant and high accuracy communication transmission occasion, such shielding requirements is not enough to be competent at.
The utility model content:
The purpose of this utility model provides a kind of three layers of shielding electric-heating belt, is characterized in having increased foil shielding layer between sheath and almag screen; Between almag screen and oversheath, increased the tinned copper wire screen, improve the effectiveness of existing electric-heating belt, make electric-heating belt requiring meticulouslyr, under the harsh more situation of environment, reach needed result of use.
The technical solution adopted in the utility model is as follows:
A kind of three layers of shielding electric-heating belt, comprise two leads, it is characterized in that: extrude exothermic materials in the middle of two wrapped in wire, the centre extrudes exothermic material wrap insulate sheath, foil shielding layer, almag woven shield, tinned copper wire woven shield, insulation oversheath successively outward.
Described three layers of shielding electric-heating belt, it is characterized in that: described lead is zinc-plated round copper electric lead.
Described three layers of shielding electric-heating belt, it is characterized in that: it is the PTC exothermic material that described centre extrudes exothermic material.
Compare with existing electric-heating belt, this utility model initiative between the screen of insulation sheath and almag braiding, extra one deck aluminium foil that added has increased one deck tinned copper wire screen more again between aluminum-magnesium alloy wire and polyethylene oversheath.Because the effect of insulation sheath, what do not shield between aluminium foil and almag, the tinned copper wire interferes with each other, and the high permeance property of aluminium foil and tinned copper wire, can more effectively absorb electromagnetic wave, test data according to spectrum analyzer, improved novel double shield electric-heating belt can promptly near the screening effectiveness of military equipment, can satisfy most civilian shielding requirements with between the screening effectiveness 50-60DB.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Embodiment:
A kind of three layers of shielding electric-heating belt, comprise two zinc-plated round copper conductors 1, zinc-plated round copper conductor 1 is outer to extrude PVC exothermic material 2, extrudes PVC exothermic material wrap insulate sheath 3, foil shielding layer 4, almag woven shield 5, tinned copper wire woven shield 6, insulation oversheath 7 successively outward.
Claims (3)
1. one kind three layers shield electric-heating belts, comprise two leads, it is characterized in that: extrude exothermic materials in the middle of two wrapped in wire, the centre extrudes exothermic material wrap insulate sheath, foil shielding layer, almag woven shield, tinned copper wire woven shield, insulation oversheath successively outward.
2. three layers of shielding electric-heating belt according to claim 1, it is characterized in that: described lead is zinc-plated round copper electric lead.
3. three layers of shielding electric-heating belt according to claim 1, it is characterized in that: the described exothermic material that extrudes is the PTC exothermic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205044681U CN201754632U (en) | 2010-08-18 | 2010-08-18 | Three-layer shielding electric tracing band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205044681U CN201754632U (en) | 2010-08-18 | 2010-08-18 | Three-layer shielding electric tracing band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201754632U true CN201754632U (en) | 2011-03-02 |
Family
ID=43622363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205044681U Expired - Fee Related CN201754632U (en) | 2010-08-18 | 2010-08-18 | Three-layer shielding electric tracing band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201754632U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106982484A (en) * | 2017-03-17 | 2017-07-25 | 贵州天虹志远电线电缆有限公司 | Strengthen the electric-heating belt of shielding |
| CN113068389A (en) * | 2021-03-29 | 2021-07-02 | 浙江大华技术股份有限公司 | Electromagnetic radiation shielding device, manufacturing method thereof and communication cable |
-
2010
- 2010-08-18 CN CN2010205044681U patent/CN201754632U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106982484A (en) * | 2017-03-17 | 2017-07-25 | 贵州天虹志远电线电缆有限公司 | Strengthen the electric-heating belt of shielding |
| CN113068389A (en) * | 2021-03-29 | 2021-07-02 | 浙江大华技术股份有限公司 | Electromagnetic radiation shielding device, manufacturing method thereof and communication 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: 20110302 Termination date: 20150818 |
|
| EXPY | Termination of patent right or utility model |