CN210986475U - Explosion-proof constant-power series-connection electrothermal belt of fluoropolymer - Google Patents
Explosion-proof constant-power series-connection electrothermal belt of fluoropolymer Download PDFInfo
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- CN210986475U CN210986475U CN201922316001.8U CN201922316001U CN210986475U CN 210986475 U CN210986475 U CN 210986475U CN 201922316001 U CN201922316001 U CN 201922316001U CN 210986475 U CN210986475 U CN 210986475U
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Abstract
The utility model discloses an explosion-proof constant power series connection electric heat tape of fluoropolymer relates to the electric heating element field, including the electric heat tape body, the inside of electric heat tape body is equipped with an at least heating core, and the outer parcel of every heating core has the heart yearn insulating layer, and the outer parcel of all heart yearn insulating layers has the inner sheath layer, and the outside of inner sheath layer has wrapped up in proper order has weaving layer and enhancement restrictive coating. The fluoropolymer explosion-proof constant-power series electric heating belt has flexibility, and can be conveniently laid close to the surface of a pipeline; the braided layer is a safe grounding wire for preventing static electricity, so that the overall strength of the electric tracing band can be improved, and the electric tracing band also plays a role in heat transfer and heat dissipation; the insulating layer of the electric heating belt is made of fluorine-containing polyolefin material, so that the electric heating belt is strong in corrosion resistance and high-temperature resistant; the outermost layer of the electric heating tape is wrapped with a layer of fluorinated polyolefin reinforced sheath layer, and the electric heating tape has higher mechanical strength and stronger corrosion resistance compared with the existing electric heating tape.
Description
Technical Field
The utility model relates to an electric heating element field, in particular to an explosion-proof constant power series connection electric heating tape of fluorine polymer.
Background
An explosion-proof constant-power series electric tracing band (hereinafter referred to as an electric heating band) is a high and new technology product developed in recent years for filling the blank of electric tracing in China and replacing import, belongs to the field of heating cables for electric equipment, and is a product between a wire cable, an electric heater and an explosion-proof electric appliance, and the electric heating band is mainly used for heat tracing heat preservation, freezing prevention and condensation prevention of pipelines, pump bodies, valves, tanks and tanks in petroleum, chemical industry, electric power, medicine, ships and machinery industries.
The series-connection type electric heating belt takes an insulated copper stranded wire as a power bus, namely, a heating core wire, the core wire with certain internal resistance can generate joule heat (Joule-Lenz law Q =0.24I 2/Rt) through a current core wire, and the magnitude of the joule heat is in direct proportion to the current square, the resistance value of the core wire and the passing time, so that the electric heating belt continuously emits heat along with the continuation of the electrifying time to form a continuous and uniform heating electric heating belt.
However, the existing constant-power series-connection electric heating belt is easy to corrode or lose pressure and the like due to various reasons during use, and in addition, the structure is too simple, so that the shielding effect and the service life are poor.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a fluoropolymer explosion-proof constant power series electric heating belt.
The utility model discloses an explosion-proof constant power series connection ribbon heater of fluoropolymer, including the ribbon heater body, the inside of ribbon heater body is equipped with an at least sinle silk that generates heat, and the outer parcel of every sinle silk that generates heat has the heart yearn insulating layer, and the outer parcel of all heart yearn insulating layers has the inner sheath layer, and the outside parcel in proper order of inner sheath layer has weaving layer and enhancement restrictive coating.
As a further improvement of the utility model, the heating wire core is selected from a copper-constantan copper wire.
As a further improvement, the core wire insulating layer, the inner sheath layer and the reinforced sheath layer are made of fluorinated polyolefin.
As a further improvement of the utility model, the covering density of the braided layer is not less than 80%.
The fluoropolymer explosion-proof constant-power series electric heating belt has flexibility, and can be conveniently laid close to the surface of a pipeline; the braided layer is a safe grounding wire for preventing static electricity, so that the overall strength of the electric tracing band can be improved, and the electric tracing band also plays a role in heat transfer and heat dissipation; the insulating layer of the electric heating belt is made of fluorine-containing polyolefin material, so that the electric heating belt is strong in corrosion resistance and high-temperature resistant; the outermost layer of the electric heating tape is wrapped with a layer of fluorinated polyolefin reinforced sheath layer, and the electric heating tape has higher mechanical strength and stronger corrosion resistance compared with the existing electric heating tape.
Drawings
FIG. 1 is a schematic view of a single-core ribbon heater of the present invention;
FIG. 2 is a schematic view of a two-core electric heating belt of the present invention;
FIG. 3 is a schematic view of the structure of the three-core electric heating belt of the present invention;
fig. 4 is a cross-sectional view of the three-core electric heating belt of the present invention.
Detailed Description
As shown in figures 1-4, the utility model discloses an explosion-proof constant power series connection electric heat tape of fluoropolymer, including the electric heat tape body, the inside of electric heat tape body is equipped with an at least heating core line 1, heating core line 1 chooses for use copper-constantan wire, every heating core line 1 outer parcel has heart yearn insulating layer 2, all heart yearn insulating layer 2 outer parcels have inner sheath layer 3, the outside of inner sheath layer 3 has wrapped up weaving layer 4 and strengthening sheath layer 5 in proper order, heart yearn insulating layer 2, inner sheath layer 3 and strengthening sheath layer 5 materials are fluorine-containing polyolefin, weaving layer 4 chooses for use 6 strands of × 24 tinned copper wire of diameter 0.15mm, cover density is not less than 80%, heating core line 1 thickness is 0.5mm, inner sheath layer 3 thickness is 0.4mm, strengthening sheath layer 5 thickness is 0.5 mm.
Working voltage of the electric heating tape: 50Hz 220V, 380V and 660V; rated power: 10-60W; dielectric strength of the ribbon heater: the working voltage between the core wires, the inner sheath and the reinforced sheath is 2 times plus 1000V/1 min; insulation resistance of the ribbon heater: more than or equal to 500M omega/km; the insulation material can resist the temperature of 260 ℃ at most, and the medium can maintain the temperature of 180 ℃ at most; the maximum using length of the single power supply of the electric heating belt is 200-4 km.
The electric heating strips in series connection have the same core wire current and equal resistance, so the whole electric heating strip heats uniformly from head to tail, and the output power is constant and is not influenced by the ambient temperature and the pipeline temperature. The electric heating tape must be used according to the specified length, and if the electric heating tape is used in an overlength way, the unit length efficiency is reduced; if the length is shortened, the power per unit length is increased, and the normal service life of the product is shortened. Because the internal resistance of the core wire of the electric heating belt is small, the power supply length of one power supply point can reach 500mm to 4kmm, and therefore, the electric heating belt is mainly suitable for heat tracing and heat preservation of long-distance and ultra-long-distance single pipelines.
The three-phase power supply's serial-type ribbon heater can adopt the structure of a three-core, also can adopt three single core structures of laying apart certain distance parallel, leads to 380V or 660V voltage at the head end, and the tail end short circuit can form three-phase star type load, and the heat dissipation of three single cores than a three-core is even, is difficult for producing overheated between the sinle silk moreover. Generally, a three-core structure is adopted when the power of a series-connection type electric heating belt is less than or equal to 30W/m, a single-core structure is adopted between 30W/m and 60W/m, a 220V single-phase power supply is suitable for a two-core structure, and the tail end of the two-core structure is also required to be in short circuit. The short circuit must be reliable during installation, otherwise it will cause no heat or overheating.
Claims (4)
1. The explosion-proof constant power series connection electric heat tape of fluoropolymer, including the electric heat tape body, the inside of its characterized in that electric heat tape body is equipped with at least one heating core (1), and every heating core (1) outer parcel has heart yearn insulating layer (2), and all heart yearn insulating layer (2) outer parcel has inner sheath layer (3), and the outside parcel in proper order of inner sheath layer (3) has weaving layer (4) and enhancement restrictive coating (5).
2. The explosion-proof constant-power series electrothermal belt of fluoropolymer according to claim 1, wherein the heating wire core (1) is copper wire.
3. The explosion-proof constant power series electrothermal belt of fluoropolymer according to claim 1, wherein the core wire insulating layer (2), the inner sheath layer (3) and the reinforcing sheath layer (5) are made of fluorinated polyolefin.
4. The explosion-proof constant-power series ribbon heater of fluoropolymer according to claim 1, characterized in that the covering density of the braided layer (4) is not less than 80%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922316001.8U CN210986475U (en) | 2019-12-21 | 2019-12-21 | Explosion-proof constant-power series-connection electrothermal belt of fluoropolymer |
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| CN201922316001.8U CN210986475U (en) | 2019-12-21 | 2019-12-21 | Explosion-proof constant-power series-connection electrothermal belt of fluoropolymer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112300498A (en) * | 2020-11-11 | 2021-02-02 | 安邦电气股份有限公司 | Electric tracing band capable of effectively preventing electric leakage |
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2019
- 2019-12-21 CN CN201922316001.8U patent/CN210986475U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112300498A (en) * | 2020-11-11 | 2021-02-02 | 安邦电气股份有限公司 | Electric tracing band capable of effectively preventing electric leakage |
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