CN210518890U - Carbon fiber heating cable with double metal sheaths - Google Patents
Carbon fiber heating cable with double metal sheaths Download PDFInfo
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- CN210518890U CN210518890U CN201921591159.XU CN201921591159U CN210518890U CN 210518890 U CN210518890 U CN 210518890U CN 201921591159 U CN201921591159 U CN 201921591159U CN 210518890 U CN210518890 U CN 210518890U
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Abstract
A double-metal sheath carbon fiber heating cable comprises a copper conductor, a first insulating layer, a carbon fiber heating layer, a second insulating layer, a copper pipe conducting layer, a third insulating layer and an outer sheath layer which are sequentially arranged from inside to outside; the carbon fiber heating layer is formed by uniformly and circumferentially twisting a plurality of carbon fiber wires; inner clamps are respectively arranged at first annular openings which are uniformly distributed on the first insulating layer along the longitudinal direction of the cable, and the copper conductors are electrically connected with the carbon fiber heating layer through the inner clamps; outer hoops are respectively arranged at second annular openings which are uniformly distributed on the second insulating layer along the longitudinal direction of the cable, and the carbon fiber heating layer and the copper pipe conducting layer are electrically connected by the outer hoops; the carbon fiber heating layer, the copper conductor and the copper pipe conducting layer are connected through the inner clamp and the outer clamp which are uniformly distributed and arranged in a staggered mode, so that the carbon fiber heating layer forms a plurality of heating resistors which are mutually connected in parallel and have the same resistance. The cable has the advantages of large heat dissipation area, high heating efficiency, short heating time and long service life.
Description
Technical Field
The utility model belongs to the heating cable field, in particular to carbon fiber heating cable of bimetal sheath.
Background
In recent years, as international petroleum resource exploitation and demand are getting larger and larger, the stock of raw high-quality oil is getting smaller and smaller, and high-wax oil exploration and development is becoming the mainstream of petroleum exploitation. By taking our country as an example, at present, 40 new oil fields are found in our country, about 2.6 ten thousand oil wells, but 80% of the oil products are oil products with three high contents, namely high wax content (20-30%), high solidification point (25-30 ℃) and high viscosity (10-20 cPa). Therefore, even if crude oil is extracted into the ground oil storage tank, how to flow the crude oil (thick oil with wax precipitation at the temperature lower than 50 ℃) in the pipeline and the oil storage tank to improve the temperature of the crude oil so as to achieve temperature compensation and improve the flow performance of the crude oil becomes a difficult problem which needs to be solved urgently by people.
In the early 70 s of the last century, the Liaohe oil field started to burn and heat by open fire using the crude oil or liquefied gas as fuel, which not only wastes energy and pollutes environment, but also is easy to explode. After 80 years, the electric heating rod is adopted for heating, the viscosity is reduced by converting electric energy into heat energy, but the electric energy consumption is too large, and the crude oil exploitation cost is increased. The energy conservation and the cost reduction become a big problem and are the problems to be urgently solved in the oil exploitation process.
The publication No. CN205657854U discloses an oil well sucker rod carbon fiber heating cable, which comprises a copper conductor arranged in the center, wherein a conductor insulating layer, a carbon fiber heating layer, a carbon fiber insulating layer and an outer sheath are sequentially arranged outside the copper conductor, the conductor insulating layer and the carbon fiber insulating layer are respectively internally provided with a ceramic rubber layer, inner ring grooves are uniformly distributed on the conductor insulating layer, an inner clamp is respectively clamped at each inner ring groove on the carbon fiber heating layer, and the carbon fiber heating layer is electrically connected with the copper conductor through a plurality of inner clamps to form a plurality of resistors which are mutually connected in parallel; outer ring grooves are uniformly distributed on the carbon fiber insulating layer, outer clamps are respectively arranged in the outer ring grooves, the carbon fiber heating layer is electrically connected with the outer sheath through the outer clamps, and a parallel loop of the resistors is formed by grounding the outer sheath; the outer hoops are respectively positioned in the middle of the two adjacent inner hoops, and the outer sheath is formed by welding and drawing a steel belt along a longitudinal seam.
Such a heating cable has the following problems: 1. the carbon fiber heating layer is electrically connected with the outer sheath through the outer hoops, and the outer sheath is grounded to form a parallel loop of the resistors, namely the outer sheath is used as a steel pipe current loop, so that the heating cable has no explosion-proof performance and cannot be used for heating the oil tank; 2. because the conductor insulating layer and the carbon fiber insulating layer of the heating cable both contain the ceramic rubber layer, the use temperature of the heating cable made by using the ceramic rubber as the insulating layer can reach 600 ℃, but the heating cable used as the oil tank heating cable needs to reach 800 ℃ for a long time, so the heating cable can not be used for heating the oil tank; 3. the carbon fiber insulating layer is sequentially composed of the mica tape wrapping layer, the ceramic rubber layer and the insulating outer protective layer from inside to outside, and the carbon fiber insulating layer is conducted to the carbon fiber heating layer for heating after being electrified and heated during working, but the carbon fiber insulating layer seriously influences the heat conduction efficiency of the carbon fiber heating layer, so that the heating cable is low in heating efficiency and low in heating speed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a heat radiating area is big is provided, and it is efficient to generate heat, and heat time is short, long service life's the carbon fiber heating cable of bimetal sheath.
The technical scheme of the utility model is realized like this:
a double-metal sheath carbon fiber heating cable comprises a copper conductor, a first insulating layer, a carbon fiber heating layer, a second insulating layer, a copper pipe conducting layer, a third insulating layer and an outer sheath layer which are sequentially arranged from inside to outside; the carbon fiber heating layer is formed by uniformly and circumferentially twisting a plurality of carbon fiber wires;
a plurality of first annular openings are uniformly distributed on the first insulating layer along the longitudinal direction of the cable, and the depth of each first annular opening is equal to the thickness of the first insulating layer; an inner hoop is arranged at each first annular opening and electrically connects the copper conductor with the carbon fiber heating layer;
a plurality of second annular openings are uniformly distributed on the second insulating layer along the longitudinal direction of the cable, and the depth of each second annular opening is equal to the thickness of the second insulating layer; an outer hoop is arranged at each second annular opening and electrically connects the carbon fiber heating layer with the copper pipe conducting layer;
the copper conductor and the copper tube conducting layer are respectively used for connecting a live wire and a zero line of single-phase electricity, and the outer sheath layer is used for connecting a grounding wire; the carbon fiber heating layer, the copper conductor and the copper pipe conducting layer are connected through the inner clamp and the outer clamp which are uniformly distributed and arranged in a staggered mode, so that the carbon fiber heating layer forms a plurality of heating resistors which are mutually connected in parallel and have the same resistance.
Preferably, the copper pipe conducting layer is formed by drawing and welding oxygen-free copper belt longitudinal seam argon arc, the sectional area of the copper pipe conducting layer is not smaller than that of the copper conductor, so that the resistance of the copper pipe conducting layer is not larger than the resistance value of the copper conductor, the cable is ensured to have no potential difference in operation, the phenomenon of discharging when the cable is used is avoided, and the working stability is improved.
Preferably, the outer sheath layer is a stainless steel corrugated pipe formed by drawing and extruding stainless steel strip longitudinal seam argon arc welding, so that the tensile strength is improved, and the heat dissipation area is increased.
Preferably, the first, second and third insulating layers are formed by lapping and wrapping a plurality of layers of mica tapes, the lapping rate is 15-20%, and the thicknesses of the first, second and third insulating layers are 0.9-1.2 mm.
Preferably, the carbon fiber heating layer is formed by uniformly and circumferentially twisting six carbon fiber wires, and the pitch ratio is 25-28 times during twisting.
The utility model has the advantages that:
1. the heating cable comprises a copper conductor, a first insulating layer, a carbon fiber heating layer, a second insulating layer, a copper pipe conducting layer, a third insulating layer and an outer sheath layer which are sequentially arranged from inside to outside; the copper pipe conducting layer is used as a heating resistor loop formed by the carbon fiber heating layer, and the insulation between the outer sheath layer and the heating resistor loop inside can be realized through the third insulating layer, so that the explosion-proof heat-insulating material is good in explosion-proof performance and is particularly suitable for heating occasions needing explosion prevention, such as an oil tank and the like; and because the copper tube conducting layer is adopted, the heat conduction performance is improved, and the temperature rise speed is high.
2. The carbon fiber heating layer is formed by uniformly and circumferentially twisting a plurality of carbon fiber wires which are all black materials, so that visible light is not generated in the heating process, the electric heating conversion efficiency is up to 98 percent, the carbon fiber heating layer is not oxidized when used at a high temperature, and the load of current in unit area is not changed; in addition, the heat conduction speed is in direct proportion to the surface area of the heating element, each strand of carbon fiber wire is composed of tens of thousands of carbon fiber wires with the diameter of only 0.02mm, and the large surface area is incomparable with the traditional alloy electric heating element. Therefore, compared with the traditional alloy electric heating body, the carbon fiber heating cable can save energy by more than 30 percent, and has the advantages of remarkable energy saving, large heat dissipation area, high heating efficiency and short heating time.
3. The carbon fiber heating layer is formed by uniformly and uniformly twisting a plurality of carbon fiber wires on the circumference, the carbon fiber wires have high self-heating efficiency, high tensile strength and high temperature resistance, and the copper pipe conducting layer and the outer sheath layer are respectively formed by welding and drawing a copper belt and a stainless steel belt along a longitudinal seam, so that the carbon fiber heating cable has the advantages of long finished product length, high tensile strength and long service life; and the outer sheath layer is welded and molded and then pressed into a corrugated shape, so that the heat dissipation area is further increased, and the heating efficiency is improved.
4. Because the heating cable is provided with three insulating layers from inside to outside, the copper conductor and the copper tube conducting layer are respectively used for connecting a live wire and a zero line of single-phase electricity, and the outer sheath layer is used for connecting a grounding wire; the long-term service temperature of the insulating layer can reach 800 ℃, so the heating cable has good high-temperature resistance effect and high use safety performance;
5. because inner clamp and outer clamp connection carbon fiber zone of heating and copper conductor and copper pipe conducting layer through equipartition staggered arrangement make the carbon fiber zone of heating form a plurality of parallelly connected and the resistance equal heating resistor each other, consequently this heating cable during operation generates heat evenly, can carry out heat conduction high-efficiently, and the programming rate is fast.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic longitudinal cross-sectional view of FIG. 1;
in the figure: a copper conductor 1; a first insulating layer 2; a carbon fiber heating layer 3; a second insulating layer 4; a copper tube conductive layer 5; a third insulating layer 6, an outer sheath layer 7; an inner hoop 8; and an outer clamp 9.
Detailed Description
As shown in fig. 1-2, the utility model relates to a bimetal sheath carbon fiber heating cable, which comprises a copper conductor 1, a first insulating layer 2, a carbon fiber heating layer 3, a second insulating layer 4, a copper tube conducting layer 5, a third insulating layer 6 and an outer sheath layer 7, which are arranged in sequence from inside to outside; the copper conductor 1 is a round metal copper rod, and the carbon fiber heating layer 3 is formed by uniformly and circumferentially twisting a plurality of carbon fiber wires; preferably, the carbon fiber heating layer is formed by uniformly and circumferentially twisting six carbon fiber wires, and the pitch ratio is 25-28 times during twisting.
The first, second and third insulating layers are formed by lapping and wrapping a plurality of layers of mica tapes, the lapping rate is 15% -20%, and the thicknesses of the first, second and third insulating layers are 0.9-1.2 mm.
A plurality of first annular openings are uniformly distributed on the first insulating layer 2 along the longitudinal direction of the cable, the distance between the first annular openings is 15-30 m, and the depth of the first annular openings is equal to the thickness of the first insulating layer 2; interior clamp 8 is gone into respectively to block in every first annular opening part, and this interior clamp 8 will copper conductor 1 with 3 electric connections of carbon fiber heating layer.
A plurality of second annular openings are uniformly distributed on the second insulating layer 4 along the longitudinal direction of the cable, the distance between the second annular openings is 15-30 m, and the depth of the second annular openings is equal to the thickness of the second insulating layer 4; and respectively clamping an outer hoop 9 at each second annular opening, wherein the outer hoop 9 is used for electrically connecting the carbon fiber heating layer 3 with the copper pipe conducting layer 5. The outer clamp 9 and the inner clamp 8 are uniformly distributed and staggered.
The copper pipe conducting layer 5 is formed by drawing and welding oxygen-free copper strips with the thickness of 0.8 +/-0.1 mm in a longitudinal seam argon arc mode, the sectional area of the copper pipe conducting layer 5 is not smaller than that of the copper conductor 1, the resistance of the copper pipe conducting layer 5 is not larger than the resistance value of the copper conductor 1, the cable is guaranteed to have no potential difference in operation, the phenomenon of discharging when the cable is used is avoided, and the working stability is improved.
The outer sheath layer 7 is formed by drawing a stainless steel band with the thickness of 0.2-0.25 mm along the longitudinal seam through argon arc welding and extruding the stainless steel band into a stainless steel corrugated pipe, so that the tensile strength is improved, and meanwhile, the heat dissipation area is increased. The copper conductor 1 and the copper tube conducting layer 5 are respectively used for connecting a live wire and a zero line of single-phase electricity, and the outer sheath layer 7 is used for connecting a grounding wire; the carbon fiber heating layer 3, the copper conductor 1 and the copper tube conducting layer 5 are connected through the inner clamp 8 and the outer clamp 9 which are uniformly distributed and arranged in a staggered mode, so that the carbon fiber heating layer 3 forms a plurality of heating resistors which are connected in parallel and have the same resistance.
The specific performance parameters of the double-metal sheath carbon fiber explosion-proof heating cable and the traditional heating cable are compared as follows:
this heating cable during operation passes through the heating resistor that carbon fiber heating layer formed, with copper conductor and copper pipe conducting layer refraction formula parallel connection, and circular telegram back carbon fiber heating layer is heat energy with electric energy conversion, through copper pipe conducting layer and stainless steel oversheath layer with heat conduction for crude oil in the oil tank, reaches the purpose to crude oil heating.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (5)
1. The utility model provides a carbon fiber heating cable of bimetal sheath which characterized in that: the copper-clad plate comprises a copper conductor, a first insulating layer, a carbon fiber heating layer, a second insulating layer, a copper pipe conducting layer, a third insulating layer and an outer sheath layer which are sequentially arranged from inside to outside; the carbon fiber heating layer is formed by uniformly and circumferentially twisting a plurality of carbon fiber wires;
a plurality of first annular openings are uniformly distributed on the first insulating layer along the longitudinal direction of the cable, and the depth of each first annular opening is equal to the thickness of the first insulating layer; an inner hoop is arranged at each first annular opening and electrically connects the copper conductor with the carbon fiber heating layer;
a plurality of second annular openings are uniformly distributed on the second insulating layer along the longitudinal direction of the cable, and the depth of each second annular opening is equal to the thickness of the second insulating layer; an outer hoop is arranged at each second annular opening and electrically connects the carbon fiber heating layer with the copper pipe conducting layer;
the copper conductor and the copper tube conducting layer are respectively used for connecting a live wire and a zero line of single-phase electricity, and the outer sheath layer is used for connecting a grounding wire; the carbon fiber heating layer, the copper conductor and the copper pipe conducting layer are connected through the inner clamp and the outer clamp which are uniformly distributed and arranged in a staggered mode, so that the carbon fiber heating layer forms a plurality of heating resistors which are mutually connected in parallel and have the same resistance.
2. The bimetallic sheathed carbon fiber heating cable of claim 1, wherein: the copper pipe conducting layer is formed by drawing oxygen-free copper belt longitudinal seam argon arc welding, the sectional area of the copper pipe conducting layer is not smaller than that of the copper conductor, so that the resistance of the copper pipe conducting layer is not larger than the resistance value of the copper conductor, the cable is ensured to run without potential difference, the phenomenon of discharging generated when the cable is used is avoided, and the working stability is improved.
3. The bimetallic sheathed carbon fiber heating cable of claim 1, wherein: the outer sheath layer is a stainless steel corrugated pipe which is formed by drawing and extruding stainless steel strip longitudinal seam argon arc welding so as to improve the tensile strength and increase the heat dissipation area.
4. The bimetallic sheathed carbon fiber heating cable of claim 1, wherein: the first, second and third insulating layers are formed by lapping and wrapping a plurality of layers of mica tapes, the lapping rate is 15% -20%, and the thicknesses of the first, second and third insulating layers are 0.9-1.2 mm.
5. The bimetallic sheathed carbon fiber heating cable of claim 1, wherein: the carbon fiber heating layer is formed by uniformly and circumferentially twisting six carbon fiber wires, and the pitch ratio is 25-28 times during twisting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921591159.XU CN210518890U (en) | 2019-09-24 | 2019-09-24 | Carbon fiber heating cable with double metal sheaths |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921591159.XU CN210518890U (en) | 2019-09-24 | 2019-09-24 | Carbon fiber heating cable with double metal sheaths |
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| CN210518890U true CN210518890U (en) | 2020-05-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110536495A (en) * | 2019-09-24 | 2019-12-03 | 秦皇岛津峰线缆制造有限公司 | A kind of bimetallic sheath carbon fiber anti-explosion heating cable and its manufacturing method and special equipment |
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2019
- 2019-09-24 CN CN201921591159.XU patent/CN210518890U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110536495A (en) * | 2019-09-24 | 2019-12-03 | 秦皇岛津峰线缆制造有限公司 | A kind of bimetallic sheath carbon fiber anti-explosion heating cable and its manufacturing method and special equipment |
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