CN113035435A - Cable coated with flame-retardant coating - Google Patents
Cable coated with flame-retardant coating Download PDFInfo
- Publication number
- CN113035435A CN113035435A CN202110331222.1A CN202110331222A CN113035435A CN 113035435 A CN113035435 A CN 113035435A CN 202110331222 A CN202110331222 A CN 202110331222A CN 113035435 A CN113035435 A CN 113035435A
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- China
- Prior art keywords
- layer
- cable
- retardant coating
- flame
- coated
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003063 flame retardant Substances 0.000 title claims abstract description 68
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 239000011248 coating agent Substances 0.000 title claims abstract description 26
- 238000000576 coating method Methods 0.000 title claims abstract description 26
- 239000010410 layer Substances 0.000 claims abstract description 65
- 239000011247 coating layer Substances 0.000 claims abstract description 46
- 239000004020 conductor Substances 0.000 claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 239000011241 protective layer Substances 0.000 claims abstract description 18
- 230000020169 heat generation Effects 0.000 claims 2
- 238000009413 insulation Methods 0.000 abstract description 5
- 230000002265 prevention Effects 0.000 abstract 1
- 230000011218 segmentation Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 230000006698 induction Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000004114 Ammonium polyphosphate Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 235000019826 ammonium polyphosphate Nutrition 0.000 description 1
- 229920001276 ammonium polyphosphate Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical group NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical group OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Insulated Conductors (AREA)
Abstract
The invention discloses a cable coated with a flame-retardant coating. A cable coated with flame retardant coating is provided with a cable protective layer, wherein a plurality of conductors are wrapped in the cable protective layer; every conductor skin wraps up in proper order has conductor shielding layer, insulating layer, second fire-retardant dope layer, insulation shielding layer, is the filling layer between the insulation shielding layer of many conductors and the cable protection layer. The outer layer of the cable protective layer is also continuously coated with a first flame-retardant coating layer, and the first flame-retardant coating layer is made of an intumescent fire-retardant coating. The first flame retardant coating layer is internally provided with a closed heating coil, and the heating coil is arranged on a radial plane and is vertical to the axial direction of the cable. Every conductor in the cable all is furnished with the intumescent fire prevention coating layer segmentation setting, and sets up between insulating layer and insulating shield layer, and when local overheat, the lateral expansion rapidly can avoid strutting the insulating shield layer, can closely wrap up the wire of cable again, and the speed of external combustion-supporting gas of separation retards heat transfer.
Description
Technical Field
The invention belongs to the technical field of cable equipment, and particularly relates to a cable coated with a flame-retardant coating.
Background
The basic structure of the power cable is composed of four parts, namely a wire core (conductor), an insulating layer, a shielding layer and a protective layer. The core is a conductive part of the power cable, is used for transmitting electric energy and is a main part of the power cable. The insulating layer electrically isolates the wire cores from the ground and the wire cores of different phases, ensures electric energy transmission and is an indispensable component in a power cable structure. The shielding layer is used for power cables of 15kV or above, and generally comprises a conductor shielding layer and an insulation shielding layer. The protective layer functions to protect the power cable from external impurities and moisture so as to prevent external force from directly damaging the power cable.
However, how to find the hidden danger of fire caused by discharge between conductors in the power cable is a problem which is troublesome at present.
Disclosure of Invention
To solve the problems set forth in the background, the present invention provides a cable coated with a flame retardant coating.
A cable coated with flame retardant coating is provided with a cable protective layer, wherein a plurality of conductors are wrapped in the cable protective layer; every conductor skin wraps up in proper order has conductor shielding layer, insulating layer, second fire-retardant dope layer, insulation shielding layer, is the filling layer between the insulation shielding layer of many conductors and the cable protection layer.
Further, the second flame-retardant coating layer is made of an expansion type fireproof coating; the second flame retardant coating layer is arranged outside the insulating layer at intervals along the axial direction and is of a multi-section structure.
Furthermore, the lengths of the sections of the second flame retardant coating layers arranged along the axial direction are equal, and the intervals between two adjacent sections of the second flame retardant coating layers are equal.
Further, the outer layer of the cable protection layer is continuously coated with a first flame-retardant coating layer, and the first flame-retardant coating layer is made of an expansion type fireproof coating.
Furthermore, a closed heating coil is arranged inside the first flame-retardant coating layer, the heating wire coil is arranged on a radial plane and is vertical to the axial direction of the cable, and the conductor is arranged outside an area surrounded by the heating wire coil.
Furthermore, a plurality of mutually independent heating conductive coils are arranged on the radial section of the same cable, and the plurality of heating conductive coils are uniformly arranged along the circumference of the first flame-retardant coating layer.
Furthermore, the heating wire coil is in a fan-shaped ring shape.
Compared with the prior art, the technical scheme disclosed by the invention has the following beneficial effects: firstly, each conductor in the cable is provided with an expansion type fireproof coating layer which is arranged in a segmented mode and is arranged between an insulating layer and an insulating shielding layer, and the expansion type fireproof coating layer can expand transversely and rapidly when the cable is locally overheated, so that the situation that external gas further supports combustion due to the fact that the insulating shielding layer is broken can be avoided, the conductor of the cable can be tightly wrapped, the external combustion-supporting gas is further blocked, and meanwhile, after the expansion type fireproof coating forms a foaming layer, the heat transfer speed can be delayed, so that the overall structure of the cable has the characteristics of high temperature resistance and fire resistance; in addition, the inner part of the expansion type fireproof coating layer on the outer layer of the cable is also provided with a heating wire coil with a surrounded area which is vertical to the axial direction of the cable and is distributed at intervals, because the three-core cable is mostly adopted in the three-phase power system cable power transmission and distribution project below 35kV, when the three-core cable has problems of conductors and insulating layers of the conductors, and when transient discharge occurs between the conductors, magnetic flux passing through the heating wire coil can change, because the magnetic induction wire generated around the linear conductor meets ampere rule, when discharge does not occur between the conductors, the area surrounded by the heating wire coil is parallel to the direction of the magnetic induction wire, once discharge occurs between the conductors, non-axial discharge can occur, so that the magnetic induction wire in a new direction is generated, and the area of the heating wire coil in the direction vertical to the new magnetic induction wire coil is not zero, so that the change of the magnetic flux is generated, and further current is generated in the heating wire coil, thereby make heating wire circle overheated, make the corresponding position inflation of intumescent fire protection coating layer from inside to make people can discover the unusual cable in the cable pit comparatively easily.
Drawings
FIG. 1: a cable coated with a flame retardant coating.
FIG. 2: a schematic radial cross-section of a cable coated with a flame retardant coating.
FIG. 3: schematic view of the second flame retardant coating layer.
FIG. 4: schematic radial cross-section of the first flame retardant coating layer, cable protective layer in example 1.
FIG. 5: the first flame retardant coating layer, the cable protective layer in example 2, is schematically shown in radial cross section.
In the figure: 1.1. the cable comprises a first flame-retardant coating layer, 1.2 cable protective layers, 1.3 heating conductive coils, 2 filling layers, 3.1 insulating shielding layers, 3.2 second flame-retardant coating layers, 3.3 insulating layers, 3.4 conductor shielding layers and 3.5 conductors.
Detailed Description
The embodiments of the present invention will be described in conjunction with the drawings in the specification, and the embodiments are disclosed for the purpose of illustrating the invention rather than limiting the invention, and all technical solutions which are simple to replace, combine and develop on the basis of the present invention shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-4, a cable coated with a flame retardant coating is provided with a cable protective layer 1.2, a plurality of conductors 3.5 are wrapped in the cable protective layer 1.2; the outer layer of each conductor 3.5 is sequentially wrapped with a conductor shielding layer 3.4, an insulating layer 3.3, a second flame retardant coating layer 3.2 and an insulating shielding layer 3.1, and a filling layer 2 is arranged between the insulating shielding layer 3.1 of the conductors 3.5 and the cable protective layer 1.2.
Further, the material of the second flame retardant coating layer 3.2 is an intumescent fire retardant coating; the second flame retardant coating layers 3.2 are arranged outside the insulating layer at intervals along the axial direction and are of a multi-section structure.
Further, the lengths of the sections of the second flame retardant coating layers 3.2 arranged along the axial direction are equal, and the intervals between the two adjacent sections of the second flame retardant coating layers 3.2 are equal.
Further, the outer layer of the cable protection layer 1.2 is continuously coated with a first flame-retardant coating layer 1.1, and the material of the first flame-retardant coating layer 1.1 is an intumescent fire-retardant coating.
Further, the inside of first flame retardant coating layer 1.1 be equipped with closed heating wire circle 1.3, heating wire circle 1.3 sets up on radial plane, be equipped with two heat conduction coils 1.3 on the same radial plane, and be perpendicular with the cable axial, and a plurality of radial planes of whole cable all are equipped with same heating wire circle 1.3, conductor 3.5 outside the region that heating wire circle 1.3 encloses, two heat conduction coils 1.3 evenly arrange along the circumference of first flame retardant coating layer 1.1, heating wire circle 1.3 be fan ring shape. When old cables are modified, the expansion type fireproof coating can be coated on the surface of the cable, when the cable is not cured, the heat generating and conducting coil 1.3 is vertically plugged into the coating, or corresponding brushing and mounting equipment is subsequently developed, and the structure is obtained after the fireproof coating is cured.
In the intumescent fire retardant coating used in this example: the base material is a silicone-acrylic emulsion, the acid source is ammonium polyphosphate, the carbonizing agent is pentaerythritol, and the foaming agent is melamine.
Example 2
As shown in fig. 1-3 and 5, the present embodiment is different from embodiment 1 in that three heat-generating coils 1.3 are disposed on the same radial cross section, and other conditions are the same.
Example 3
A cable coated with flame retardant coating is provided with a cable protective layer 1.2, and a plurality of conductors 3.5 are wrapped in the cable protective layer 1.2; the outer layer of each conductor 3.5 is sequentially wrapped with a conductor shielding layer 3.4, an insulating layer 3.3, a second flame retardant coating layer 3.2 and an insulating shielding layer 3.1, and a filling layer 2 is arranged between the insulating shielding layer 3.1 of the conductors 3.5 and the cable protective layer 1.2.
Further, the material of the second flame retardant coating layer 3.2 is an intumescent fire retardant coating; the second flame retardant coating layers 3.2 are arranged outside the insulating layer at intervals along the axial direction and are of a multi-section structure.
Further, the lengths of the sections of the second flame retardant coating layers 3.2 arranged along the axial direction are equal, and the intervals between the two adjacent sections of the second flame retardant coating layers 3.2 are equal.
Further, the outer layer of the cable protection layer 1.2 is continuously coated with a first flame-retardant coating layer 1.1, and the material of the first flame-retardant coating layer 1.1 is an intumescent fire-retardant coating.
Claims (7)
1. A cable coated with a flame retardant coating, characterized in that: the cable is provided with a cable protective layer (1.2), and a plurality of conductors (3.5) are wrapped in the cable protective layer (1.2);
the outer layer of each conductor (3.5) is sequentially wrapped with a conductor shielding layer (3.4), an insulating layer (3.3), a second flame-retardant coating layer (3.2) and an insulating shielding layer (3.1), and a filling layer (2) is arranged between the insulating shielding layers (3.1) of the conductors (3.5) and the cable protection layer (1.2).
2. A flame retardant coated cable according to claim 1 wherein: the second flame-retardant coating layer (3.2) is made of an expansion type fireproof coating; the second flame retardant coating layers (3.2) are arranged outside the insulating layer at intervals along the axial direction and are of a multi-section structure.
3. A flame retardant coated cable according to claim 2 wherein: each length of the second flame-retardant coating layers (3.2) arranged along the axial direction is equal, and the interval between two adjacent second flame-retardant coating layers (3.2) is equal.
4. A flame retardant coated cable according to claim 1 or 2 or 3 wherein: the outer layer of the cable protection layer (1.2) is also continuously coated with a first flame-retardant coating layer (1.1), and the first flame-retardant coating layer (1.1) is made of an intumescent fire-retardant coating.
5. A flame retardant coated cable in accordance with claim 4 wherein: the inside of first flame retardant coating layer (1.1) be equipped with closed heating coil (1.3), heating wire circle (1.3) set up on radial plane, and be perpendicular with the cable axial, the conductor is outside the region that heating wire circle encloses.
6. A flame retardant coated cable in accordance with claim 5 wherein: be equipped with a plurality of mutually independent heat generation coils (1.3) on same cable radial cross section, a plurality of heat generation coils (1.3) are evenly arranged along the circumference of first fire-retardant coating layer (1.1).
7. A flame retardant coated cable in accordance with claim 5 wherein: the heat generating and conducting coil (1.3) is in a fan-shaped ring shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110331222.1A CN113035435A (en) | 2021-03-29 | 2021-03-29 | Cable coated with flame-retardant coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110331222.1A CN113035435A (en) | 2021-03-29 | 2021-03-29 | Cable coated with flame-retardant coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113035435A true CN113035435A (en) | 2021-06-25 |
Family
ID=76473268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110331222.1A Pending CN113035435A (en) | 2021-03-29 | 2021-03-29 | Cable coated with flame-retardant coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113035435A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090078446A1 (en) * | 2005-07-29 | 2009-03-26 | Jean-Louis Pons | Fire-resistant safety cable provided with a single insulating covering |
| CN203895164U (en) * | 2014-02-27 | 2014-10-22 | 安徽江淮电缆集团有限公司 | Fireproof anti-flaming cable |
| CN105575523A (en) * | 2015-08-27 | 2016-05-11 | 胡振强 | Moisture-proof cable |
| CN207021009U (en) * | 2017-05-11 | 2018-02-16 | 湖南湘江电缆有限公司 | A kind of fire resistant flexible transport cable |
| CN109148028A (en) * | 2018-09-27 | 2019-01-04 | 广西广缆科技集团有限公司 | A kind of intelligent cable |
-
2021
- 2021-03-29 CN CN202110331222.1A patent/CN113035435A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090078446A1 (en) * | 2005-07-29 | 2009-03-26 | Jean-Louis Pons | Fire-resistant safety cable provided with a single insulating covering |
| CN203895164U (en) * | 2014-02-27 | 2014-10-22 | 安徽江淮电缆集团有限公司 | Fireproof anti-flaming cable |
| CN105575523A (en) * | 2015-08-27 | 2016-05-11 | 胡振强 | Moisture-proof cable |
| CN207021009U (en) * | 2017-05-11 | 2018-02-16 | 湖南湘江电缆有限公司 | A kind of fire resistant flexible transport cable |
| CN109148028A (en) * | 2018-09-27 | 2019-01-04 | 广西广缆科技集团有限公司 | A kind of intelligent cable |
Non-Patent Citations (1)
| Title |
|---|
| 朱洪法: "精细化工产品配方与制造（第五册）", 河北科学技术出版社 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210625 |
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| RJ01 | Rejection of invention patent application after publication |