CN113130124B - Flame-retardant wear-resistant communication cable and manufacturing method thereof - Google Patents
Flame-retardant wear-resistant communication cable and manufacturing method thereof Download PDFInfo
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- CN113130124B CN113130124B CN202110420142.3A CN202110420142A CN113130124B CN 113130124 B CN113130124 B CN 113130124B CN 202110420142 A CN202110420142 A CN 202110420142A CN 113130124 B CN113130124 B CN 113130124B
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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
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/16—Insulating conductors or cables by passing through or dipping in a liquid bath; by spraying
- H01B13/165—Insulating conductors or cables by passing through or dipping in a liquid bath; by spraying by spraying
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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
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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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
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
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- 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
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- Electromagnetism (AREA)
- Insulated Conductors (AREA)
Abstract
The invention discloses a flame-retardant wear-resistant communication cable and a manufacturing method thereof, and the flame-retardant wear-resistant communication cable comprises a wire body, a support frame and a sheath, wherein the support frame is cylindrical and has a hollowed-out inner part, the support frame is embedded and connected on a central axis of the sheath and is parallel to the sheath, the wire body is embedded and connected between the outer wall of the support frame and the inner wall of the sheath, a flame-retardant layer is fixedly filled between the wire body and the support frame, the outer surfaces of two ends of the support frame are fixedly connected with connectors, two ends of the sheath are fixedly provided with ventilating ports which are hermetically connected with the connectors, the ventilating ports are fixedly connected with waterproof breathable films, high-temperature gas circulates in the support frame, so that the heat of a conductor is dissipated, effective physical cooling is carried out, and the risk of spontaneous combustion of the wire and the cable is effectively reduced by matching with the use of the flame-retardant layer.
Description
Technical Field
The invention relates to the technical field of wires and cables, in particular to a flame-retardant wear-resistant communication cable and a manufacturing method thereof.
Background
The wire and cable industry, although only a complete set of industries, occupies the value of 1/4, which is the chinese electrical industry. The product has various types and wide application range, relates to the industries of electric power, construction, communication, manufacturing and the like, and is closely related to each department of national economy. The electric wire and cable is also called as artery and nerve of national economy, is a basic device which is indispensable for transmitting electric energy, transmitting information, manufacturing various motors, instruments and meters and realizing electromagnetic energy conversion, and is a necessary basic product in future electrification and information-based society.
The existing electric wire and cable only have a single conductive function, and generally only have a conductor and an insulating layer, wherein the insulating layer is formed by melting, then combining with the conductor and cooling; after the power line is repeatedly used, the insulating layer is easy to rub and damage, so that the conductor loses the protection of the insulating layer, unsafe factors such as electric leakage are caused, and natural phenomena easily occur to the electric wire and the cable under the high-temperature environment, so that the condition that the appliance equipped with the electric wire and the cable catches fire is caused, and dangers are caused.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a flame-retardant wear-resistant communication cable and a manufacturing method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps: a flame-retardant wear-resistant communication cable comprises a conductor body, a support frame and a sheath, wherein the support frame is cylindrical and hollow inside, the supporting frame is embedded and connected on the central axis of the sheath and is parallel to the sheath, the lead body is embedded and connected between the outer wall of the supporting frame and the inner wall of the sheath, a flame-retardant layer is fixedly filled between the wire body and the support frame, the outer surfaces of the two ends of the support frame are fixedly connected with connectors, the two ends of the sheath are fixedly provided with ventilating ports which are hermetically connected with the connecting ports, the shape of the lead body is circular, the lead body comprises four conductors, each conductor is sequentially wrapped with an insulating layer, a shielding layer, a braiding layer and a first wear-resistant layer from inside to outside, the air vent is fixedly connected with a waterproof air-permeable membrane, and the radian of the outer surface of the waterproof air-permeable membrane is consistent with that of the sheath.
Preferably, the support frame is made of TIF700 heat-conducting silica gel.
Preferably, the inner wall of the support frame is fixedly sprayed with a waterproof coating.
Preferably, the outer layer of the sheath comprises a second wear-resistant layer, an anti-oxidation layer and a waterproof layer from outside to inside, wherein the first wear-resistant layer and the second wear-resistant layer are respectively formed by combining 10-60 parts of epoxy resin, 5-50 parts of organic amine substances, 0.5-18 parts of an accelerator, 0.5-20 parts of a coupling agent, 5-20 parts of a toughening agent, 100 parts of an abrasive, 10-60 parts of fibers and 5-20 parts of a thixotropic agent.
Preferably, each conductor is formed by twisting 3 copper wires.
Preferably, the centers of the connecting port and the ventilation port are at the same point in the vertical direction, and the diameter of the connecting port is smaller than that of the ventilation port.
As a preferred scheme, the waterproof grade of the waterproof breathable film reaches five grades.
Preferably, the thickness of the insulating layer is 2mm-2.5 mm.
Preferably, the flame-retardant layer is a high-heat-resistant boehmite flame retardant.
The manufacturing method of the flame-retardant wear-resistant communication cable comprises the following steps:
s1, conductor preparation 1: stranding 3 strands of copper single wire bundles into conductors for standby by using a stranding machine, and preparing four conductors in total;
s2, conductor preparation 2: wrapping each conductor with an insulating layer and a shielding layer through a tape wrapping machine, then carrying out silver-plated copper weaving by using a weaving machine, finally wrapping a first wear-resistant layer on the weaving layer through the tape wrapping machine, and placing for later use;
s3, preparing a support frame: the TIF700 heat-conducting silica gel is compressed into a cylindrical shape through a compression molding machine, the interior of the cylindrical shape is hollow, two small cylinders are vertically lifted at two ends, and the interior of each small cylinder is communicated with the interior of the TIF700 heat-conducting silica gel;
s4, assembling the support frame and the sheath: inserting the support frame along the central axis of the sheath, and then connecting the connecting ports at the two ends of the support frame with the ventilation ports of the sheath in a sealing manner through the adhesive;
s5, assembling the conductor: uniformly inserting four conductors between the outer wall of the support frame and the inner wall of the sheath, and reserving gaps between the four conductors;
s6, assembling a flame-retardant layer: filling the flame-retardant layer between the four conductors and the support frame, wherein the four conductors are separated by the flame-retardant layer;
s7, extruding: extruding the conducting wire in the step 6 by using a wire extruder, wherein the extruding temperature is 190-;
s8, spraying: and (4) spraying the outer surface of the formed product obtained in the step (7), and spraying a waterproof layer, an anti-oxidation layer and a second wear-resistant layer in sequence.
The flame-retardant wear-resistant communication cable and the manufacturing method thereof disclosed by the invention have the beneficial effects that:
1. at electric wire and cable in the use, produce a large amount of heats under the conductor circular telegram circumstances, outside gas enters into the inside fretwork department of support frame through ventilative mouthful to from another ventilative mouthful outflow, form the circulation of air, with this effectual processing of cooling down, cooperate the use on fire-retardant layer, the risk of spontaneous combustion takes place for effectual reduction electric wire and cable, and inside the waterproof ventilated membrane of ventilative department can effectively avoid external moisture to enter into the support frame, guarantee gaseous normal circulation simultaneously.
2. At wire and cable in the use, through the second wearing layer for the wearability reinforcing between the conductor, and through the effectual holistic wearability that has increased the cable of outmost first wearing layer, avoid the conductor to expose the condition that takes place the electric leakage, bilayer wearing layer improves the security for people's use cable.
3. The support frame adopts TIF700 heat conduction silica gel to make, and TIF700 heat conduction silica gel can strengthen heat-conduction for when the air circulates in the support frame, the cooling effect is better, and support frame inner wall fixed spraying has waterproof coating, can effectually avoid a small amount of steam infiltration to enter into fire-retardant layer, cooperation high temperature environment, steam can't solidify, will be along with the circulation of air, the outflow support frame.
Drawings
FIG. 1 is a schematic cross-sectional view of a flame retardant, abrasion resistant communications cable of the present invention;
FIG. 2 is a perspective view of a flame retardant, abrasion resistant communications cable according to the present invention;
fig. 3 is a flow chart of a method for manufacturing a flame-retardant wear-resistant communication cable according to the invention.
In the figure: 1. a lead body; 2. a support frame; 3. a sheath; 4. a flame retardant layer; 5. a connecting port; 6. a ventilation opening; 7. a conductor; 8. an insulating layer; 9. a shielding layer; 10. weaving layer; 11. a first wear resistant layer; 12. a waterproof breathable film; 13. a water-resistant coating; 14. a second wear layer; 15. an oxidation-resistant layer; 16. and a waterproof layer.
Detailed Description
For the convenience of understanding of those skilled in the art, the technical solution of the present invention will be further described in detail with reference to fig. 1 to 3.
Example one
A flame-retardant wear-resistant communication cable comprises a wire body 1, a support frame 2 and a sheath 3, wherein the support frame 2 is cylindrical and has a hollowed-out inner part, the support frame 2 is embedded and connected on the central axis of the sheath 3 and is parallel to the sheath 3, the wire body 1 is embedded and connected between the outer wall of the support frame 2 and the inner wall of the sheath 3, a flame-retardant layer 4 is fixedly filled between the wire body 1 and the support frame 2, the outer surfaces of the two ends of the support frame 2 are fixedly connected with connectors 5, the two ends of the sheath 3 are fixedly provided with air vents 6 which are hermetically connected with the connectors 5, the wire body 1 is circular in shape, the wire body 1 comprises four conductors 7, and each conductor 7 is sequentially wrapped with an insulating layer 8 from inside to outside, the outer surface radian of the waterproof breathable film 12 is consistent with that of the sheath 3;
example two
The same features of this embodiment as those of the first embodiment are not described again, and the different features of this embodiment from those of the first embodiment are that in this embodiment, a waterproof coating 13 is fixedly sprayed on the inner wall of the supporting frame 2; in this setting: the waterproof coating 13 sprayed on the inner wall of the support frame is fixed, so that a small amount of water vapor can be effectively prevented from permeating into the flame-retardant layer 4, and the water vapor cannot be solidified in cooperation with a high-temperature environment and flows out of the support frame 2 along with air circulation;
the outer layer of the sheath 3 comprises a second wear-resistant layer 14, an anti-oxidation layer 15 and a waterproof layer 16 from outside to inside, the first wear-resistant layer 11 and the second wear-resistant layer 14 are formed by combining 10-60 parts of epoxy resin, 5-50 parts of organic amine substances, 0.5-18 parts of an accelerant, 0.5-20 parts of a coupling agent, 5-20 parts of a toughening agent, 100 parts of an abrasive, 10-60 parts of fibers and 5-20 parts of a thixotropic agent, each conductor 7 is formed by twisting 3 copper wires, the circle centers of a connecting port 5 and a ventilation port 6 are the same point in the vertical direction, the diameter of the connecting port 5 is smaller than that of the ventilation port 6, and in the arrangement: wire and cable is in the use, through second wearing layer 14 for 3 surface wearability of sheath increase, with the effectual holistic wear resistance of cable that has increased of first wearing layer 11 cooperation, avoid the exposed condition of taking place the electric leakage of conductor 7, the bilayer wearing layer has further improved the security that people used the cable, and anti oxidation coating 15 has improved sheath 3's practical life simultaneously.
EXAMPLE III
The same features of this embodiment and the first embodiment are not repeated, and the different features of this embodiment and the first embodiment are that, in this embodiment, the waterproof grade of the waterproof breathable film 12 reaches five grades, the thickness of the insulating layer 8 is 2mm to 2.5mm, and the flame retardant layer 4 is a high heat-resistant boehmite flame retardant, in this setting: support frame 2 adopts TIF700 heat conduction silica gel to make, and TIF700 heat conduction silica gel can strengthen heat-conduction for when the air circulates in support frame 2, the cooling effect is better, and waterproof ventilated membrane 12's waterproof performance is strong, combines the design of self arc appearance, has the guide effect and guides water to flow from waterproof ventilated membrane 12 surface to external water, can not pass through waterproof ventilated membrane 12, has further strengthened waterproof ventilated membrane 12's waterproof performance.
A manufacturing method of a flame-retardant wear-resistant communication cable comprises the following steps:
s1, conductor 7 preparation 1: stranding 3 strands of copper single wire bundles into conductors 7 by using a stranding machine for standby, and preparing four conductors 7 in total;
s2, preparation of conductor 7 2: wrapping each conductor 7 with an insulating layer 8 and a shielding layer 9 through a taping machine, then carrying out silver-plated copper weaving by using a weaving machine, and finally wrapping a first wear-resistant layer 11 on a woven layer 10 through the taping machine, and placing for later use;
s3, preparation of a support frame 2: the TIF700 heat-conducting silica gel is compressed into a cylindrical shape through a compression molding machine, the interior of the cylindrical shape is hollow, two small cylinders are vertically lifted at two ends, and the interior of each small cylinder is communicated with the interior of the TIF700 heat-conducting silica gel;
s4, assembling the support frame 2 and the sheath 3: inserting the support frame 2 along the central axis of the sheath 3, and then sealing and connecting the connecting ports 5 at the two ends of the support frame 2 with the ventilating ports 6 of the sheath 3 by using an adhesive;
s5, assembling conductor 7: uniformly inserting four conductors 7 between the outer wall of the support frame 2 and the inner wall of the sheath 3, and reserving gaps between the four conductors;
s6, assembling of the flame-retardant layer 4: filling the flame-retardant layer 4 between the four conductors 7 and the support frame 2, wherein the four conductors 7 are separated by the flame-retardant layer 4;
s7, extruding: extruding the conducting wire in the step 6 by using a wire extruder, wherein the extruding temperature is 190-;
s8, spraying: and (3) spraying the outer surface of the formed product in the step (7), and spraying a waterproof layer 16, an anti-oxidation layer 15 and a second wear-resistant layer 14 in sequence.
A flame-retardant wear-resistant communication cable and a manufacturing method thereof are disclosed, wherein the working process is as follows: in wire and cable is in the use, produce a large amount of heats under the conductor circular telegram circumstances, outside gas enters into the inside fretwork department of support frame 2 through ventilative mouthful 6, and flow from another ventilative mouthful 6, form the circulation of air, with this effectual processing of cooling, cooperate fire-retardant layer 4's use, the risk of spontaneous combustion takes place for effectual reduction wire and cable, and increased the wearability between the conductor 7 through first wearing layer 11, the security performance has been improved, avoid taking place the condition of short circuit electric leakage, second wearing layer 14 simultaneously, make 3 surface wearability of sheath increase, with the effectual holistic wearability that has increased of cable of first wearing layer 11 cooperation, avoid the exposed condition that takes place the electric leakage of conductor 7, double-deck wearing layer, the security that people used the cable has further been improved. Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The utility model provides a wear-resisting communication cable of fire-retardant type, includes wire body (1), support frame (2) and sheath (3), its characterized in that: the supporting frame (2) is cylindrical and hollow, the supporting frame (2) is embedded and connected on the central axis of the sheath (3) and is parallel to the sheath (3), the lead body (1) is embedded and connected between the outer wall of the supporting frame (2) and the inner wall of the sheath (3), a flame-retardant layer (4) is fixedly filled between the lead body (1) and the supporting frame (2), the outer surfaces of the two ends of the supporting frame (2) are fixedly connected with connectors (5), the two ends of the sheath (3) are fixedly provided with ventilating openings (6) hermetically connected with the connectors (5), the supporting frame (2) is inserted along the central axis of the sheath (3), then the connectors (5) at the two ends of the supporting frame (2) are hermetically connected with the ventilating openings (6) of the sheath (3) through adhesives, the circle centers of the connectors (5) and the ventilating openings (6) are the same point in the vertical direction, the diameter of connector (5) be less than the diameter of ventilative mouthful (6), the appearance of wire body (1) is circular, wire body (1) include four conductors (7) and every conductor (7) wrap up insulating layer (8), shielding layer (9), weaving layer (10) and first wearing layer (11) from inside to outside in proper order, ventilative mouthful (6) fixedly connected with waterproof ventilated membrane (12), the surface radian of waterproof ventilated membrane (12) and sheath (3) radian unanimity.
2. The flame-retardant wear-resistant communication cable according to claim 1, wherein: the support frame (2) is made of TIF700 heat-conducting silica gel.
3. The flame-retardant wear-resistant communication cable according to claim 1, wherein: the inner wall of the support frame (2) is fixedly sprayed with a waterproof coating (13).
4. The flame-retardant wear-resistant communication cable according to claim 1, wherein: the outer layer of the sheath (3) comprises a second wear-resistant layer (14), an anti-oxidation layer (15) and a waterproof layer (16) from outside to inside.
5. The flame-retardant wear-resistant communication cable according to claim 1, wherein: each conductor (7) is formed by twisting 3 copper wires.
6. The flame-retardant wear-resistant communication cable according to claim 1, wherein: the waterproof grade of the waterproof breathable film (12) reaches five grades.
7. The flame-retardant wear-resistant communication cable according to claim 1, wherein: the thickness of the insulating layer (8) is 2mm-2.5 mm.
8. The flame-retardant wear-resistant communication cable according to claim 1, wherein: the flame-retardant layer (4) is a high-heat-resistance boehmite flame retardant.
9. A method of making the flame retarded, abrasion resistant communications cable according to any one of claims 1 to 8 comprising the steps of:
s1, conductor (7) preparation 1: stranding 3 strands of copper single wire bundles into conductors (7) by using a stranding machine for standby, and preparing four conductors (7) in total;
s2, conductor (7) preparation 2: wrapping each conductor (7) with an insulating layer (8) and a shielding layer (9) through a taping machine, then carrying out silver-plated copper weaving by using a weaving machine, and finally wrapping a first wear-resistant layer (11) on a woven layer (10) through the taping machine and placing for later use;
s3, preparing a support frame (2): the TIF700 heat-conducting silica gel is compressed into a cylindrical shape through a compression molding machine, the interior of the cylindrical shape is hollow, two small cylinders are vertically lifted at two ends, and the interior of each small cylinder is communicated with the interior of the TIF700 heat-conducting silica gel;
s4, assembling the support frame (2) and the sheath (3): inserting the support frame (2) along the central axis of the sheath (3), and then connecting ports (5) at two ends of the support frame (2) with a ventilation port (6) of the sheath (3) in a sealing manner through an adhesive;
s5, assembling the conductor (7): uniformly inserting four conductors (7) between the outer wall of the support frame (2) and the inner wall of the sheath (3) with a gap left between;
s6, assembling of the flame-retardant layer (4): filling the flame-retardant layer (4) between the four conductors (7) and the support frame (2), wherein the four conductors (7) are separated by the flame-retardant layer (4);
s7, spraying: and (3) spraying the outer surface of the formed product in the step (6), and spraying a waterproof layer (16), an anti-oxidation layer (15) and a second wear-resistant layer (14) in sequence.
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| CN202110420142.3A CN113130124B (en) | 2021-04-19 | 2021-04-19 | Flame-retardant wear-resistant communication cable and manufacturing method thereof |
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| CN202110420142.3A CN113130124B (en) | 2021-04-19 | 2021-04-19 | Flame-retardant wear-resistant communication cable and manufacturing method thereof |
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| CN113130124B true CN113130124B (en) | 2022-05-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105400372A (en) * | 2015-12-16 | 2016-03-16 | 襄阳市百盾防护涂层材料有限公司 | Wear-resistant coating material |
| CN210015716U (en) * | 2019-06-04 | 2020-02-04 | 扬州市中能电缆有限公司 | Wear-resistant and flame-retardant mining communication cable |
| WO2020051945A1 (en) * | 2018-09-10 | 2020-03-19 | 大连理工大学 | Air conditioning terminal device with heat exchange in narrow annular space |
| CN210640023U (en) * | 2019-07-19 | 2020-05-29 | 骆斌阳 | Wear-resistant waterproof electric wire |
| CN211045099U (en) * | 2019-11-29 | 2020-07-17 | 铜陵铜泉线缆科技有限公司 | Special photovoltaic cable |
| CN111952005A (en) * | 2020-08-03 | 2020-11-17 | 鲍伟飞 | Power cable capable of quickly dissipating heat for high-power equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209747216U (en) * | 2019-05-09 | 2019-12-06 | 江苏广汇电缆有限公司 | Dampproofing radiating cable |
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2021
- 2021-04-19 CN CN202110420142.3A patent/CN113130124B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105400372A (en) * | 2015-12-16 | 2016-03-16 | 襄阳市百盾防护涂层材料有限公司 | Wear-resistant coating material |
| WO2020051945A1 (en) * | 2018-09-10 | 2020-03-19 | 大连理工大学 | Air conditioning terminal device with heat exchange in narrow annular space |
| CN210015716U (en) * | 2019-06-04 | 2020-02-04 | 扬州市中能电缆有限公司 | Wear-resistant and flame-retardant mining communication cable |
| CN210640023U (en) * | 2019-07-19 | 2020-05-29 | 骆斌阳 | Wear-resistant waterproof electric wire |
| CN211045099U (en) * | 2019-11-29 | 2020-07-17 | 铜陵铜泉线缆科技有限公司 | Special photovoltaic cable |
| CN111952005A (en) * | 2020-08-03 | 2020-11-17 | 鲍伟飞 | Power cable capable of quickly dissipating heat for high-power equipment |
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| CN113130124A (en) | 2021-07-16 |
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