CN113950174A - Special heat tracing power cable - Google Patents
Special heat tracing power cable Download PDFInfo
- Publication number
- CN113950174A CN113950174A CN202111278010.8A CN202111278010A CN113950174A CN 113950174 A CN113950174 A CN 113950174A CN 202111278010 A CN202111278010 A CN 202111278010A CN 113950174 A CN113950174 A CN 113950174A
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- heat
- conductor
- heat conduction
- cable
- temperature
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/54—Heating elements having the shape of rods or tubes flexible
- H05B3/56—Heating cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/40—Insulated conductors or cables characterised by their form with arrangements for facilitating mounting or securing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
- H01B9/024—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of braided metal wire
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Landscapes
- Resistance Heating (AREA)
- Insulated Conductors (AREA)
Abstract
The invention discloses a special heat tracing power cable which comprises a cable body, wherein the cable body is positioned in an inner cavity of a heat insulation outer sheath, and one or more heat conduction pipes attached to the cable body are arranged in the inner cavity; a temperature sensor is arranged in the heat-insulating outer sheath and is connected with a temperature controller and a controller which are powered by a power supply through leads; a plurality of spaced heating belts are arranged in the heat conduction pipe, and the core wire penetrates through and connects the heating belts in series; the heating belt comprises a heating block, a heat conduction layer and a metal frame, and a high-temperature-resistant filling medium is filled in the heat conduction pipe; the heat-conducting pipe is also internally provided with a heat-insulating layer wrapped on the heating belt, and the outer side of the heat-insulating layer is wrapped with a metal mesh. The invention has the following advantages and effects: the heat tracing effect can be improved, and the temperature balance of heat exchange is optimized.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a special heat tracing power cable.
Background
The heat tracing cable is a cable structure product which takes electric power as energy and utilizes alloy resistance wires to conduct electricity and generate heat to achieve the heat preservation effect, the electric heat tracing cable is a flat long strip, the heat tracing cable is widely applied to the industrial, building and commercial fields, is mainly used for freezing prevention and heat preservation of pipelines, valves, pump bodies, storage tanks, reaction towers, instrument boxes, pavements, tunnels, floor heating and the like, and can automatically limit the heating temperature and maintain the heating temperature.
However, the heat tracing cable in the prior art has poor performance in some environments with relatively low temperature, and has the defects of poor heat tracing effect and large temperature difference of local heat exchange. Therefore, there is a need to provide a special heat tracing power cable to improve the heat tracing effect and optimize the temperature balance of the heat exchange.
Disclosure of Invention
The invention aims to provide a special heat tracing power cable to solve the problems in the background art.
The technical purpose of the invention is realized by the following technical scheme: a special heat tracing power cable comprises a cable body, wherein a heat insulation outer sheath is sleeved outside the cable body, an inner cavity is formed in the heat insulation outer sheath, the cable body is positioned in the inner cavity, one or more heat conduction pipes attached to the cable body are arranged in the inner cavity, a core wire formed by twisting a plurality of copper wires penetrates through the heat conduction pipes, the cable body is bound and fixed with the heat conduction pipes through a heat insulation adhesive tape, the heat insulation adhesive tape is an aluminum foil adhesive tape, and the thickness of the heat insulation adhesive tape is 0.13 mm;
the temperature sensor is arranged in the heat-insulation outer sheath, the real-time temperature in the heat-insulation outer sheath is obtained through the temperature sensor, the temperature sensor is connected to the temperature controller through a lead, the visualization and adjustment of the temperature value are realized through the temperature controller, the temperature controller is connected to the controller through a lead, the controller is connected between the power supply and the core wire to play a role in adjusting the current, and the temperature sensor, the temperature controller and the controller are all powered by the power supply;
a plurality of heating belts are regularly arranged in the heat conduction pipe, are arranged at intervals, and are penetrated by a core wire and are connected in series; each heating belt comprises a heating block positioned in the center, the heating block can generate heat after being electrified, a heat conduction layer with an enlarged area is wrapped on the periphery of the heating block to diffuse the heat generated by the heating block, a metal frame with a fixed shape and capable of conducting heat is wrapped outside the heat conduction layer, and a high-temperature-resistant filling medium is filled in the heat conduction pipe;
the heat conduction pipe is also internally provided with a heat insulation layer wrapped outside the heating belt, the outer side of the heat insulation layer is wrapped with a metal net capable of conducting heat, and the metal net is tightly attached to the cable body.
The further setting is that: and a heat conduction connecting bridge is arranged between the metal frame and the heat preservation layer, the heat conduction connecting bridge is provided with a bottom edge attached to the upper end/lower end of the metal frame and a top edge attached to the heat preservation layer, and the top edges of the adjacent heat conduction connecting bridges are connected, so that heat released by the metal frame is uniformly exchanged to the heat preservation layer, and the condition of local temperature imbalance is avoided.
The further setting is that: the heating block is made of PTC conductive material.
The further setting is that: the heat conduction layer and the heat conduction connecting bridge are both made of graphene.
The further setting is that: the heat-insulating layer is made of alkali superfine glass wool.
The further setting is that: the cable body comprises a conducting wire, an electromagnetic shielding layer is wrapped outside the conducting wire, and the electromagnetic shielding layer is of a metal net structure; the wire comprises a first conductor and a second conductor, wherein the first conductor is positioned at the upper end of the second conductor, a first filling rope attached to the first conductor and the second conductor is arranged on the left side of the first conductor and the left side of the second conductor, a second filling rope attached to the first conductor and the right side of the second conductor is arranged on the right side of the first conductor and the right side of the second conductor, and non-wet fillers are filled in the wire.
The further setting is that: : the first filling rope and the second filling rope are both made of polypropylene.
The further setting is that: : the non-wet filler comprises glass fiber and polypropylene.
The invention has the beneficial effects that:
1. according to the cable, the heat exchange with the cable body is realized by arranging the heat conduction pipe, and the heat released by the heat conduction pipe is prevented from being lost due to the contact with air by arranging the heat insulation outer sheath, so that the utilization rate can be effectively improved, and the effect is better; in addition, the heat-preservation adhesive tape and the heat-conducting pipe are bound by the aluminum foil adhesive tape, so that the stability is better.
2. According to the invention, the temperature sensor, the temperature controller and the controller are arranged to realize temperature detection, display and control, so that a user can conveniently perform visual adjustment, effectively master the real-time temperature in the heat-insulating outer sheath, and is convenient to track and adjust.
3. According to the invention, the plurality of heating belts are regularly arranged in the heat conduction pipe, the heating blocks of the heating belts can generate heat after being electrified, and the heating belts are arranged at intervals, so that mutual interference can be effectively avoided, and the heat can be more uniformly dispersed; then, the heat conduction layer is arranged to enlarge the area and enable the heat to be diffused more widely and more uniformly; then through setting up the metal frame, realize the heat conduction, the heat that will release leads to the heat preservation in the area outside that generates heat, and the metal frame still has the effect of fixed area shape that generates heat, avoids generating heat the area and takes place the condition of tensile, expansion under external vibrations. The setting of heat preservation can let the more stable diffusion of heat everywhere to the heat preservation, and the stability everywhere of letting the heat preservation is close.
4. The heat-conducting connecting bridge is arranged in the heat-insulating layer, the heat-conducting connecting bridge is provided with a bottom edge attached to the upper end/lower end of the metal frame and a top edge attached to the heat-insulating layer, and the top edges of the adjacent heat-conducting connecting bridges are connected, so that heat released by the metal frame is uniformly exchanged to the heat-insulating layer, and the condition of local temperature imbalance is avoided.
5. The electromagnetic shielding is realized by arranging the electromagnetic shielding layer.
6. According to the invention, the first filling rope, the second filling rope and the non-wetting filler are arranged to fix the first conductor and the second conductor, so that the structural stability is optimized.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment;
FIG. 2 is a schematic structural diagram of a heat pipe in one embodiment;
fig. 3 is a schematic structural diagram of a cable body in the embodiment.
In the figure: 1. a cable body; 2. an outer insulating sheath; 3. a heat conducting pipe; 41. a heat-preserving adhesive tape; 51. a temperature sensor; 52. a temperature controller; 53. a controller; 54. a power source; 61. a core wire; 31. a heat generating tape; 311. a heat block; 312. a heat conductive layer; 313. a metal frame; 32. filling a medium; 33. a heat-insulating layer; 34. a metal mesh; 35. a thermally conductive connecting bridge; 351. a bottom edge; 352. a top edge; 11. an electromagnetic shielding layer; 121. a first conductor; 122. a second conductor; 131. a first fill string; 132. a second fill string; 14. a non-wetting filler.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, a special heat tracing power cable comprises a cable body 1, a heat insulation outer sheath 2 is sleeved outside the cable body 1, an inner cavity is arranged in the heat insulation outer sheath 2, the cable body 1 is positioned in the inner cavity, a heat conduction pipe 3 attached to the cable body 1 is arranged in the inner cavity, a core wire 61 formed by twisting a plurality of copper wires is arranged in the heat conduction pipe 3 in a penetrating manner, the cable body 1 is bound and fixed with each heat conduction pipe 3 through a heat insulation adhesive tape 41, the heat insulation adhesive tape 41 is an aluminum foil adhesive tape, and the thickness is 0.13 mm;
a temperature sensor 51 is arranged in the outer insulating sheath 2, the real-time temperature in the outer insulating sheath 2 is obtained through the temperature sensor 51, the temperature sensor 51 is connected to a temperature controller 52 through a lead, the visualization and adjustment of the temperature value are realized through the temperature controller 52, the temperature controller 52 is connected to a controller 53 through a lead, the controller 53 is connected between a power supply 54 and a core wire 61 to play a role in adjusting the current, and the temperature sensor 51, the temperature controller 52 and the controller 53 are all powered by the power supply 54; when heating is needed, the core wire 61 is communicated, and when electrons of the core wire 61 pass through the heating block 311, the heating block 311 releases heat, and the heating power is improved by increasing the current. The controller 53 includes a single chip and an existing power driving circuit.
A plurality of heating belts 31 are regularly arranged in the heat conduction pipe 3, the heating belts 31 are arranged at intervals, and a core wire 61 penetrates through the heating belts 31 and connects the heating belts 31 in series; each heating belt 31 comprises a heating block 311 positioned at the central position, the heating block 311 can generate heat after being electrified, a heat conduction layer 312 which is expanded in area and used for diffusing the heat generated by the heating block 311 is wrapped on the periphery of the heating block 311, a metal frame 313 which is fixed in shape and can conduct heat is wrapped on the heat conduction layer 312, and a high-temperature-resistant filling medium 32 is filled in the heat conduction pipe 3;
the heat-insulating layer 33 wrapped outside the heating belt 31 is further arranged in the heat-conducting pipe 3, the heat-conducting metal mesh 34 is wrapped outside the heat-insulating layer 33, and the metal mesh 34 is tightly attached to the cable body 1.
Wherein, a heat conduction connecting bridge 35 is arranged between the metal frame 313 and the heat preservation layer 33, the heat conduction connecting bridge 35 is provided with a bottom edge 351 attached to the upper end/lower end of the metal frame 313 and a top edge 352 attached to the heat preservation layer 33, and the adjacent top edges 352 of the heat conduction connecting bridges 35 are connected, thereby the heat released by the metal frame 313 is uniformly heat exchanged to the heat preservation layer 33, and the condition of local temperature imbalance is avoided.
Wherein the heat block 311 is made of a PTC conductive material.
Wherein the heat conducting layer 312 and the heat conducting connecting bridge 35 are both made of graphene.
Wherein, the heat preservation layer 33 is made of alkali superfine glass wool.
The cable body 1 comprises a conducting wire, an electromagnetic shielding layer 11 is wrapped outside the conducting wire, and the electromagnetic shielding layer 11 is of a metal net structure; the lead comprises a first conductor 121 and a second conductor 122, the first conductor 121 is positioned at the upper end of the second conductor 122, a first filling rope 131 attached to the first conductor 121 and the second conductor 122 is arranged on the left side of the first conductor 121 and the second conductor 122, a second filling rope 132 attached to the first conductor 121 and the second conductor 122 is arranged on the right side of the first conductor 121 and the second conductor 122, and the lead is filled with non-wetting filler 14.
Wherein the first filling string 131 and the second filling string 132 are both made of polypropylene.
The non-wetting filler 14 includes glass fiber and polypropylene.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (8)
1. A special heat tracing power cable comprises a cable body (1), and is characterized in that: the cable comprises a cable body (1), and is characterized in that a heat insulation outer sheath (2) is sleeved outside the cable body (1), an inner cavity is formed in the heat insulation outer sheath (2), the cable body (1) is positioned in the inner cavity, one or more heat conduction pipes (3) attached to the cable body (1) are arranged in the inner cavity, a core wire (61) formed by twisting a plurality of copper wires is arranged in the heat conduction pipes (3) in a penetrating manner, the cable body (1) is bound and fixed with the heat conduction pipes (3) through a heat insulation adhesive tape (41), the heat insulation adhesive tape (41) is an aluminum foil adhesive tape, and the thickness of the heat insulation adhesive tape is 0.13 mm;
a temperature sensor (51) is arranged in the outer insulating sheath (2), the real-time temperature in the outer insulating sheath (2) is obtained through the temperature sensor (51), the temperature sensor (51) is connected to a temperature controller (52) through a lead, the visualization and adjustment of the temperature value are realized through the temperature controller (52), the temperature controller (52) is connected to a controller (53) through a lead, the controller (53) is connected between a power supply (54) and a core wire (61) to play a role in adjusting the current, and the temperature sensor (51), the temperature controller (52) and the controller (53) are all powered by the power supply (54);
a plurality of heating belts (31) are regularly arranged in the heat conduction pipe (3), the heating belts (31) are arranged at intervals, and a core wire (61) penetrates through the heating belts (31) and connects the heating belts in series; each heating belt (31) comprises a heating block (311) positioned in the center, the heating block (311) can generate heat after being electrified, the periphery of the heating block (311) is wrapped with a heat conduction layer (312) with an enlarged area so as to diffuse the heat generated by the heating block (311), a metal frame (313) with a fixed shape and capable of conducting heat is wrapped outside the heat conduction layer (312), and a high-temperature-resistant filling medium (32) is filled in the heat conduction pipe (3);
the heat-conducting pipe (3) is also internally provided with a heat-insulating layer (33) wrapped on the outer side of the heating belt (31), the outer side of the heat-insulating layer (33) is wrapped with a metal net (34) capable of conducting heat, and the metal net (34) is tightly attached to the cable body (1).
2. The special heat tracing power cable of claim 1, wherein: a heat conduction connecting bridge (35) is arranged between the metal frame (313) and the heat preservation layer (33), the heat conduction connecting bridge (35) is provided with a bottom edge (351) attached to the upper end/lower end of the metal frame (313) and a top edge (352) attached to the heat preservation layer (33), and the top edges (352) of the adjacent heat conduction connecting bridges (35) are connected, so that heat released by the metal frame (313) is uniformly exchanged to the heat preservation layer (33), and the condition of local temperature imbalance is avoided.
3. The special heat tracing power cable of claim 1, wherein: the heating block (311) is made of PTC conductive material.
4. The special heat tracing power cable of claim 2, wherein: the heat conduction layer (312) and the heat conduction connecting bridge (35) are both made of graphene.
5. The special heat tracing power cable of claim 1, wherein: the heat-insulating layer (33) is made of alkali superfine glass wool.
6. The special heat tracing power cable of claim 1, wherein: the cable body (1) comprises a lead, an electromagnetic shielding layer (11) is wrapped outside the lead, and the electromagnetic shielding layer (11) is of a metal net structure; the lead comprises a first conductor (121) and a second conductor (122), wherein the first conductor (121) is positioned at the upper end of the second conductor (122), a first filling rope (131) attached to the first conductor (121) and the second conductor (122) is arranged on the left side of the first conductor and the second conductor, a second filling rope (132) attached to the first conductor and the second conductor (121) is arranged on the right side of the second conductor (122), and a non-wetting filler (14) is filled in the lead.
7. The corrosion-resistant fire-fighting cable of claim 6, wherein: the first filling rope (131) and the second filling rope (132) are both made of polypropylene.
8. The corrosion-resistant fire-fighting cable of claim 6, wherein: the non-wetting filler (14) comprises glass fiber and polypropylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111278010.8A CN113950174B (en) | 2021-10-30 | 2021-10-30 | Special heat tracing power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111278010.8A CN113950174B (en) | 2021-10-30 | 2021-10-30 | Special heat tracing power cable |
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| Publication Number | Publication Date |
|---|---|
| CN113950174A true CN113950174A (en) | 2022-01-18 |
| CN113950174B CN113950174B (en) | 2023-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111278010.8A Active CN113950174B (en) | 2021-10-30 | 2021-10-30 | Special heat tracing power cable |
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| Country | Link |
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| CN (1) | CN113950174B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114334253A (en) * | 2022-01-25 | 2022-04-12 | 远东电缆有限公司 | Heat tracing cable and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2237918Y (en) * | 1995-06-02 | 1996-10-16 | 程崇钧 | Temp-autocontrol sucker rod cable |
| CN108447611A (en) * | 2018-04-26 | 2018-08-24 | 嘉兴奥亿普数据电缆有限公司 | A kind of safety cable of cooling protection |
| CN207800230U (en) * | 2017-12-20 | 2018-08-31 | 西部电缆股份有限公司 | A kind of power cable with heat dissipation performance |
| CN209747198U (en) * | 2019-03-29 | 2019-12-06 | 上海新时达线缆科技有限公司 | Cable with improved insulation |
| US20200256160A1 (en) * | 2013-04-12 | 2020-08-13 | Pablo Javier INVIERNO | Heating cable for extraction pipes of viscous hydrocarbons or paraffinic in conventional wells and type tight wells, vertical or directional, with flooded annular in casual or permanent form, suitable for use between low and high fluid pressures ranges |
| CN112351531A (en) * | 2020-11-09 | 2021-02-09 | 安邦电气股份有限公司 | Combined self-temperature-limiting electric tracing band |
| CN112469154A (en) * | 2020-12-17 | 2021-03-09 | 安邦电气股份有限公司 | Skin effect heat tracing cable |
| CN112885523A (en) * | 2020-12-30 | 2021-06-01 | 翔宜电子器材(东台)有限公司 | High and low temperature resistant flame-retardant cable |
| CN113573431A (en) * | 2021-08-03 | 2021-10-29 | 安邦电气股份有限公司 | Electric tracing band for explosion-proof place |
| CN215577831U (en) * | 2021-06-09 | 2022-01-18 | 常丰线缆有限公司 | Cold-resistant cable |
-
2021
- 2021-10-30 CN CN202111278010.8A patent/CN113950174B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2237918Y (en) * | 1995-06-02 | 1996-10-16 | 程崇钧 | Temp-autocontrol sucker rod cable |
| US20200256160A1 (en) * | 2013-04-12 | 2020-08-13 | Pablo Javier INVIERNO | Heating cable for extraction pipes of viscous hydrocarbons or paraffinic in conventional wells and type tight wells, vertical or directional, with flooded annular in casual or permanent form, suitable for use between low and high fluid pressures ranges |
| CN207800230U (en) * | 2017-12-20 | 2018-08-31 | 西部电缆股份有限公司 | A kind of power cable with heat dissipation performance |
| CN108447611A (en) * | 2018-04-26 | 2018-08-24 | 嘉兴奥亿普数据电缆有限公司 | A kind of safety cable of cooling protection |
| CN209747198U (en) * | 2019-03-29 | 2019-12-06 | 上海新时达线缆科技有限公司 | Cable with improved insulation |
| CN112351531A (en) * | 2020-11-09 | 2021-02-09 | 安邦电气股份有限公司 | Combined self-temperature-limiting electric tracing band |
| CN112469154A (en) * | 2020-12-17 | 2021-03-09 | 安邦电气股份有限公司 | Skin effect heat tracing cable |
| CN112885523A (en) * | 2020-12-30 | 2021-06-01 | 翔宜电子器材(东台)有限公司 | High and low temperature resistant flame-retardant cable |
| CN215577831U (en) * | 2021-06-09 | 2022-01-18 | 常丰线缆有限公司 | Cold-resistant cable |
| CN113573431A (en) * | 2021-08-03 | 2021-10-29 | 安邦电气股份有限公司 | Electric tracing band for explosion-proof place |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114334253A (en) * | 2022-01-25 | 2022-04-12 | 远东电缆有限公司 | Heat tracing cable and preparation method and application thereof |
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| CN113950174B (en) | 2023-06-27 |
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