CN202634735U - Self-limiting temperature heat tracing cable - Google Patents
Self-limiting temperature heat tracing cable Download PDFInfo
- Publication number
- CN202634735U CN202634735U CN 201220263961 CN201220263961U CN202634735U CN 202634735 U CN202634735 U CN 202634735U CN 201220263961 CN201220263961 CN 201220263961 CN 201220263961 U CN201220263961 U CN 201220263961U CN 202634735 U CN202634735 U CN 202634735U
- Authority
- CN
- China
- Prior art keywords
- layer
- cable
- conductive plastic
- conductive plastics
- plastics layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model provides a self-limiting temperature heating tracing cable. The cable comprises copper core wires, a conductive plastic layer, an insulating layer, a shielding layer and a sheath layer. The cable is mainly characterized in that the conductive plastic layer tightly and pressingly wraps the copper core wires; the cross section of the conductive plastic layer is dumbbell-shaped; a heating belt which is formed by folding a film is distributed at the middle position of the conductive plastic layer; a heating element of the conductive plastic layer comprises semiconductive intelligent carbon black which is subjected to magnetization treatment; the insulating layer tightly and pressingly wraps the conductive plastic layer; the shielding layer which is knitted from tinned copper wires is arranged outside the insulating layer; the sheath layer pressingly wraps the cable; the insulating layer is made of improved crosslinked polyethylene or high-temperature-resistant fluoroplastic; and the shielding layer is a knit layer which is made of the tinned soft round copper wires, and the coverage density of the knit layer is 80 percent. The cable has the good heating tracing performance, good heat preservation performance, good anti-freeze performance, good freeze-proof performance and long service life, and the cable is favorable for popularization and application.
Description
Technical field
The utility model relates to a kind of from limitting warm accompanying-heat cable.
Background technology
From the warm accompanying-heat cable of limit is to be used in to prevent that Yin Wendu is low excessively and cause internal liquid to solidify or abnormal conditions occur, plays the insulation protective action.Be widely used in pipeline, the tracing thermal-insulating of storage tank, the anti-freezing, antifreeze of industrial enterprises such as fire-fighting, oil, chemical industry, iron and steel, electric power.Belt carcass from the warm accompanying-heat cable of limit is a kind of very complicated polymer composite; It is composited by multiple material and conducting medium; Through extrusion molding after specific chemical change and the physical treatment, of between two parallel wires, forming keeps parallel heating original paper continuously.In heating process, the variation of (being called for short the PTC effect) of surprising positive temperature coefficient has taken place in the quantity----resistance of the internal semiconductor passage of this macromolecular material, and has the specific molecule memory capability, and this anamnestic reaction is strong.When ambient temperature raise, the high molecular polymer scintilla expanded, and carbon granules separates gradually, has caused circuit interruption, and resistance rises, and companion's hot line reduces power output automatically; When ambient temperature reduced, high molecular polymer particulate spacing was shunk again and is diminished, the corresponding formation circuit that couples together of carbon granules, and companion's hot line heating power rises again automatically; When ambient temperature was in a certain stable state, it is stable that system will reach thermal output, makes it have the temperature self limiting.Its control temperature can be not too high also can be not low excessively, can reconcile automatically.Thereby, reached safe and reliable purpose.But tracing thermal-insulating, anti-freezing and the antifreezing effect of self-limited type electric heating in the market are very poor, and this badly influences the useful life of cable.
Summary of the invention
The purpose of the utility model is intended to overcome the shortcoming that exists in the above-mentioned prior art, and a kind of tracing thermal-insulating, anti-freezing, good effect of freezing protection are provided, the temperature of the limit certainly accompanying-heat cable of long service life.
The utility model is realized through following technical scheme:
A kind of from limitting warm accompanying-heat cable; Comprise: copper conductor 1, conductive plastics layer 2, insulating barrier 3, screen 4 and restrictive coating 5; It is characterized in that described conductive plastics layer closely is extruded on the said copper core conductor; Its cross section is a dumbbell shaped, and the centre position is distributed with through the folding heating tape that forms of film, and the conductive plastics layer contains the semiconductive intelligence carbon black of handling through magnetization; Said insulating barrier is extruded on the said conductive plastics layer, and its outside also is provided with the screen of tinned copper wire braiding, and said restrictive coating is extruded in the cable outside.
The material of described insulating barrier is improvement crosslinked polyethylene or thermostable fluorine plastics.
Described screen is that coverage density reaches 80% zinc-plated soft circular copper wire braid.
The utility model compared with prior art has following beneficial effect:
1, the conductive plastics layer temperature resistant grade of the utility model is high, has heat sensitivity, and the semiconductive carbon black of employing is the intelligent carbon black of handling through magnetization, can be with variations in temperature, and resistance changes, and can control to needed temperature.
2, the similar dumbbell shaped of the shape of cross section of the conductive plastics of the utility model, wherein between position distribution pass through the folding heating tape that forms of film, thinner, resistance is bigger, caloric value is big, and is far away apart from conductor, can not make conductor oxidation, blackout.
3, the conductive plastics layer of the utility model has fabulous heat aging performance, through overtesting, in the time of 200 ℃, 168 hours aging after, tensile strength and elongation at break are still qualified, thereby have guaranteed the useful life of cable.
4, the insulating barrier of the utility model uses and extrudes bigger crosslinked polyethylene of effective melt index or thermostable fluorine plastics, and this insulated with material resistance is good, only needs skim just can guarantee insulation property and water resistance, and radiating effect is better.
5, the zinc-plated soft circular copper wire braid of the screen of the utility model is that the copper wire weaving is special, range upon range of causing, and the cable bending property is better.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: copper conductor-1, conductive plastics layer-2, insulating barrier-3, screen-4, restrictive coating-5.
Embodiment and accompanying drawings through the utility model given below can further be well understood to the utility model.But they are not the qualifications to the utility model.
Embodiment
As shown in Figure 1, a kind of from limitting warm accompanying-heat cable, comprising: copper conductor 1, conductive plastics layer 2, insulating barrier 3, screen 4 and restrictive coating 5.Wherein: the conductive plastics layer closely is extruded on the copper core conductor, forms an equipotential volume together in when energising and metallic conductor; Its cross section is a dumbbell shaped, and the centre position is distributed with through the folding heating tape that forms of film, and the conductive plastics layer contains the semiconductive intelligence carbon black of semiconductive intelligence carbon black for handling through magnetization of handling through magnetization; The specification of copper conductor is 7 * 0.50,19 * 0.41, can adopt bare copper wire or tinned copper wire, during operation, on two conductors, applies generating positive and negative voltage.The conductive plastics layer adopts the semiconductive macromolecular material, is the semiconductive intelligence carbon black of handling through magnetization, and the cross section of this conductive plastics layer is a dumbbell shaped; Wherein there be through the folding heating tape that forms of film position distribution, the heater element during as operation is between two conductors; Temperature is low more, and resistance is more little, and it is big more to generate heat; So, can not melt in the uniform temperature interval.Insulating barrier is extruded on the conductive plastics layer, plays the insulation protection effect, and the material of insulating barrier is improvement crosslinked polyethylene or thermostable fluorine plastics; The outside of insulating barrier also is provided with the screen of tinned copper wire braiding, and screen is that coverage density reaches 80% zinc-plated soft circular copper wire braid, plays shielding action, also has the ground protection effect simultaneously; Restrictive coating is that plastics are extruded in the cable outside, plays a protective role.Insulating barrier adopts the improvement sexual intercourse to join polyethylene (250 ℃ of the working temperatures of 90 ℃ of working temperatures, fluoro-containing plastic).Screen adopts zinc-plated soft circular copper wire, coverage density 80%.Have three functions, (1) shielding inside and outside electromagnetic field non-interference; (2) copper wire is the good conductor of heat, evenly is transmitted to the outside to inner heat; (3) armouring protective effect, protection inside is not damaged.Restrictive coating is to be prepared from crosslinked polyethylene (90 ℃ of working temperatures), fire retardant polyolefin (80 ℃ of working temperatures), fluoro-containing plastic (250 ℃ of working temperatures), silicon rubber (180 ℃ of working temperatures).
Claims (3)
1. limit warm accompanying-heat cable certainly for one kind; Comprise: copper conductor (1), conductive plastics layer (2), insulating barrier (3), screen (4) and restrictive coating (5); It is characterized in that: described conductive plastics layer closely is extruded on the said copper core conductor; Its cross section is a dumbbell shaped, and the centre position is distributed with through the folding heating tape that forms of film, and the conductive plastics layer contains the semiconductive intelligence carbon black of handling through magnetization; Said insulating barrier is extruded on the said conductive plastics layer, and its outside also is provided with the screen of tinned copper wire braiding, and said restrictive coating is extruded in the cable outside.
2. according to claim 1 from limitting warm accompanying-heat cable, it is characterized in that: the material of described insulating barrier is improvement crosslinked polyethylene or thermostable fluorine plastics.
3. according to claim 1 from limitting warm accompanying-heat cable, it is characterized in that: described screen is that coverage density reaches 80% zinc-plated soft circular copper wire braid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220263961 CN202634735U (en) | 2012-06-04 | 2012-06-04 | Self-limiting temperature heat tracing cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220263961 CN202634735U (en) | 2012-06-04 | 2012-06-04 | Self-limiting temperature heat tracing cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202634735U true CN202634735U (en) | 2012-12-26 |
Family
ID=47387870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220263961 Expired - Fee Related CN202634735U (en) | 2012-06-04 | 2012-06-04 | Self-limiting temperature heat tracing cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202634735U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113473658A (en) * | 2021-06-08 | 2021-10-01 | 山东华宁电伴热科技有限公司 | Self-temperature-limiting electric heating belt and production system and process thereof |
| CN113689984A (en) * | 2021-08-25 | 2021-11-23 | 安徽环瑞电热器材有限公司 | High-performance flame-retardant temperature-limiting electric tracing band |
-
2012
- 2012-06-04 CN CN 201220263961 patent/CN202634735U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113473658A (en) * | 2021-06-08 | 2021-10-01 | 山东华宁电伴热科技有限公司 | Self-temperature-limiting electric heating belt and production system and process thereof |
| CN113689984A (en) * | 2021-08-25 | 2021-11-23 | 安徽环瑞电热器材有限公司 | High-performance flame-retardant temperature-limiting electric tracing band |
| CN113689984B (en) * | 2021-08-25 | 2023-11-10 | 安徽环瑞电热器材有限公司 | High-performance flame-retardant temperature-limiting electric tracing band |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20210307114A1 (en) | Heating Device | |
| JPS592693B2 (en) | Conductive polymer composition having positive temperature coefficient characteristics and heater using the same | |
| CN202634735U (en) | Self-limiting temperature heat tracing cable | |
| MX2014014051A (en) | Oil smelter cable. | |
| CN203721318U (en) | Motor cable provided with drainage filament | |
| CN106332333A (en) | Anti-freezing self-regulating electric tracing band for water supply pipeline | |
| CN203896346U (en) | Temperature-controlled heating cable | |
| CN204348360U (en) | A kind of intelligent self-heating multicore Plastic-sheathed Cable | |
| CN201995151U (en) | Self-temperature-control heating cable used at low temperature | |
| CN203721244U (en) | Building engineering acid and alkali resistance flexible cable | |
| CN203327270U (en) | Intelligent temperature self-regulating heat tracing cable for oil-gas pipeline | |
| CN203276946U (en) | Novel single-core cross-linked armored cable | |
| CN203721292U (en) | Insulation armored flexible cable for motor | |
| CN203746464U (en) | Environmentally-friendly double-sheath flexible cable for tunnel | |
| CN203721370U (en) | Coal mine electric power armor environmental protection flexible cable | |
| CN202696930U (en) | Low-temperature, tensile-type and self-regulating heating cable | |
| CN204066854U (en) | Cable, cable bundle and load circuit | |
| CN106413156A (en) | Flame-retardant PTC-material self-temperature-limiting geothermal heating cable | |
| CN103903802A (en) | Armored environment-friendly flexible power cable used for coal mine | |
| CN103943187A (en) | Multi-conductor insulated flexible cable | |
| CN203746461U (en) | Armor insulating double-sheath flexible cable for tunnel | |
| CN204596483U (en) | Heatproof insulated cable | |
| CN202363131U (en) | Photovoltaic cable | |
| CN204155635U (en) | It is a kind of that Environment-friendlytensile tensile is resistance to turns round wind energy cable | |
| CN203839067U (en) | High-temperature resistant single-core cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20140604 |