CN110690002A - Flexible fireproof rubber-sheathed flexible cable and manufacturing method thereof - Google Patents
Flexible fireproof rubber-sheathed flexible cable and manufacturing method thereof Download PDFInfo
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- CN110690002A CN110690002A CN201910969854.3A CN201910969854A CN110690002A CN 110690002 A CN110690002 A CN 110690002A CN 201910969854 A CN201910969854 A CN 201910969854A CN 110690002 A CN110690002 A CN 110690002A
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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
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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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
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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
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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
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
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Abstract
The invention provides a flexible fireproof rubber-sheathed flexible cable and a manufacturing method thereof, and the flexible fireproof rubber-sheathed flexible cable comprises a flexible copper conductor, wherein a synthetic mica tape is lapped outside the flexible copper conductor, the outer layer of the synthetic mica tape is extruded with ethylene-propylene insulating rubber, the flexible copper conductor, the synthetic mica tape and the ethylene-propylene insulating rubber form a wire core, a plurality of wire cores are manufactured into a cable core through a cabling machine, the center position of the cable core is filled with alkali-free glass yarns to form a center filling layer, the periphery of the cable core is filled with the alkali-free glass yarns to form an edge filling layer, so that the cross section of the cable core forms a regular circle, the cable core is lapped with glass fiber tapes, a ceramic silicon rubber fireproof layer is arranged outside the glass fiber tapes, and an outer sheath is arranged outside the ceramic silicon. The cable keeps the normal electrification of the line for use under the condition of flame combustion, continuously ensures the equipment operation and the normal use of the lighting and fire-fighting emergency equipment, creates favorable conditions for people to evacuate in time, and reduces the fire loss.
Description
Technical Field
The invention relates to the field of cable manufacturing, in particular to a flexible fireproof rubber-sheathed flexible cable and a manufacturing method thereof.
Background
The GB/T5013.4-2008 standard relates to a rubber insulated cable with the model number of 60245IEC 66(YCW) and a complementary JB/T8735.3-2016 standard relates to a universal rubber jacketed flexible cable with the model number of YCW, the cable is used for power connection of various mobile electrical equipment, instruments, power lighting and the like, is mainly used for power connection of various mobile coal mining equipment under a coal mine, meets the standard MT818.5-2009 of the coal department and is a mobile rubber jacketed flexible cable with the model number of MY-0.38/0.66, has flame retardant property, if take place the condition of a fire, flame burns the cable, and flame can not stretch to cable both sides along the cable, but the cable can cause alternate conductor short circuit because of the burning damage by the part of flame burning, then the cable run-off loses service function, and cable junction's electrical equipment can all lose effect.
Disclosure of Invention
The invention aims to provide a flexible fireproof rubber-sheathed flexible cable and a manufacturing method thereof, wherein the cable keeps a line normally powered on for use under the condition of flame combustion, the operation of equipment and the normal use of lighting and fire-fighting emergency equipment are continuously ensured, favorable conditions are created for people to evacuate in time, and the fire loss is reduced.
The technical scheme of the invention is as follows:
the utility model provides a flexible fire prevention rubber cover flexible cable, includes the soft copper conductor, the soft copper conductor overlaps outward and has synthetic mica tape around the package, the outer crowded package of synthetic mica tape has ethylene propylene insulating rubber, soft copper conductor, synthetic mica tape and ethylene propylene insulating rubber constitute the sinle silk, and many sinle silks make the cable core through the cabling machine, and the central point of cable core puts to pack has alkali-free glass yarn to form central filling layer, thereby it has the edge filling layer to form the regular circular of cross section formation that makes the cable core to fill at the periphery of cable core, thereby the cable core overlaps outward and winds package glass fiber area, and glass fiber outband is provided with ceramic silicon rubber flame retardant coating, sets up the oversheath outside the ceramic silicon rubber flame retardant coating and forms the cable.
The soft copper conductor adopts a fifth type of soft copper conductor to ensure the soft characteristic of the cable.
The lapping cover of the synthetic mica tape is not less than 50% of the tape width.
The thinnest point of the ethylene-propylene insulating rubber is not less than 90% of the nominal thickness.
The glass fiber tape is provided with two layers.
The wire core consisting of the soft copper conductor, the synthetic mica tape and the ethylene propylene insulating rubber comprises three main wires and a ground wire.
A manufacturing method of a flexible fireproof rubber-sheathed flexible cable comprises the following specific steps:
selecting a fifth type of soft copper conductor, twisting the conductor, testing the resistance of a main line conductor and a ground wire conductor after twisting is finished, and wrapping the conductor to form a mica tape after the resistance of the conductor is qualified;
sending the conductor wrapped with the synthetic mica tape to a continuous vulcanization extrusion production line to complete an ethylene propylene insulating rubber extruding process, performing a spark test after the ethylene propylene insulating rubber extruding process is completed, and testing the elongation of the insulating strength;
step three, after the elongation rate of the tested insulation strength is qualified, the cabling machine completes the cabling of the multi-core cable, the center and the edge of the multi-core cable are both filled with alkali-free glass yarns, and the filling diameter is determined by taking the cable roundness as a reference;
wrapping two layers of glass fiber tapes outside the cabling cable core, and carrying out a voltage withstand test on the cabling cable core according to the test voltage specified by the finished product;
step five, finishing the extrusion of the ceramic silicon rubber fireproof layer on a silicon rubber extrusion production line after the pressure resistance test is qualified;
and step six, finishing the extrusion process of the outer sheath on a continuous sulfur extrusion production line after the ceramic silicon rubber fireproof layer is extruded to form a cable product.
The sixth step requires routine testing after completing the manufacture of the cable product and testing the cable for line integrity under flame conditions in accordance with GB/T19216.21-2003.
The lapping cover of the synthetic mica tape in the first step is not less than 50% of the bandwidth, and the lapping cover of the glass fiber tape in the fourth step is not less than 50% of the bandwidth.
The thinnest point of the ethylene propylene insulating rubber extruded in the second step is not less than 90% of the nominal thickness, the thinnest point of the ceramic silicon rubber fireproof layer in the fifth step is not less than 85% of the specified nominal thickness, and the thinnest point of the outer sheath in the sixth step is not less than 85% of the specified nominal thickness.
Compared with the prior art, the invention has the beneficial effects that: the fireproof design is added on the structural design of the original rubber jacketed flexible cable, particularly the ceramic silicon rubber fireproof layer keeps the soft and flexible movable use function of the rubber jacketed flexible cable at ordinary times, after a fire disaster occurs, the ceramic silicon rubber fireproof layer of the cable forms a hard ceramic shell which is not melted, dropped or dropped under the condition of flame combustion, plays a role in isolation, prevents fire, separates temperature, insulates heat and blocks fire, prevents conductors in the cable from being damaged at intervals, keeps the insulating property, keeps the normal power-on use of the cable under the condition of flame combustion, continuously ensures the normal use of equipment operation and lighting and fire-fighting emergency equipment, creates favorable conditions for people to withdraw in time, and reduces the fire loss.
Drawings
FIG. 1 is a schematic cross-sectional structure of the present invention.
FIG. 2 is a flow chart of the method of the present invention.
The reference numbers in the figures denote: 1-a soft copper conductor; 2-synthesizing a mica tape; 3-ethylene propylene insulating rubber; 4-a center-fill layer; 5-an edge filling layer; 6-glass fiber band; 7-ceramic silicon rubber fire-proof layer; 8-outer sheath.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution:
the utility model provides a flexible fire prevention rubber cover flexible cable, includes soft copper conductor 1, soft copper conductor 1 overlaps outward and has wrapped synthetic mica tape 2, synthetic mica tape 2 skin crowded package has ethylene-propylene insulating rubber 3, soft copper conductor 1, synthetic mica tape 2 and 3 constitution sinle silks of ethylene-propylene insulating rubber, many sinle silks make the cable core through the cabling machine, and the central point of cable core puts to pack has alkali-free glass yarn to form central filling layer 4, thereby it forms edge filling layer 5 to pack alkali-free glass yarn in the periphery of cable core and makes the cross section of cable core form regular circular, the cable core overlaps outward and winds package glass fiber tape 6, and glass fiber tape 6 is provided with pottery silicon rubber flame retardant coating 7 outward, and pottery silicon rubber flame retardant coating 7 is provided with oversheath 8 outward and is formed the cable.
The soft copper conductor 1 adopts a fifth type of soft copper conductor to ensure the soft characteristic of the cable.
The lapping cover of the synthetic mica tape 2 is not less than 50% of the tape width.
The thinnest point of the ethylene-propylene insulating rubber 3 is not less than 90% of the nominal thickness.
The glass fiber tape 6 is provided with two layers.
The wire core consisting of the soft copper conductor 1, the synthetic mica tape 2 and the ethylene propylene insulating rubber 3 comprises three main wires and a ground wire.
A manufacturing method of a flexible fireproof rubber-sheathed flexible cable is characterized by comprising the following specific steps:
selecting a fifth type of soft copper conductor, twisting the conductor, testing the resistance of a main line conductor and a ground wire conductor after twisting is finished, and wrapping the conductor to form a mica tape after the resistance of the conductor is qualified;
sending the conductor wrapped with the synthetic mica tape to a continuous vulcanization extrusion production line to complete an ethylene propylene insulating rubber extruding process, performing a spark test after the ethylene propylene insulating rubber extruding process is completed, and testing the elongation of the insulating strength;
step three, after the elongation rate of the tested insulation strength is qualified, the cabling machine completes the cabling of the multi-core cable, the center and the edge of the multi-core cable are both filled with alkali-free glass yarns, and the filling diameter is determined by taking the cable roundness as a reference;
wrapping two layers of glass fiber tapes outside the cabling cable core, and carrying out a voltage withstand test on the cabling cable core according to the test voltage specified by the finished product;
step five, finishing the extrusion of the ceramic silicon rubber fireproof layer on a silicon rubber extrusion production line after the pressure resistance test is qualified;
and step six, finishing the extrusion process of the outer sheath on a continuous sulfur extrusion production line after the ceramic silicon rubber fireproof layer is extruded to form a cable product.
The sixth step requires routine testing after completing the manufacture of the cable product and testing the cable for line integrity under flame conditions in accordance with GB/T19216.21-2003.
The lapping cover of the synthetic mica tape in the first step is not less than 50% of the bandwidth, and the lapping cover of the glass fiber tape in the fourth step is not less than 50% of the bandwidth.
The thinnest point of the ethylene propylene insulating rubber extruded in the second step is not less than 90% of the nominal thickness, the thinnest point of the ceramic silicon rubber fireproof layer in the fifth step is not less than 85% of the specified nominal thickness, and the thinnest point of the outer sheath in the sixth step is not less than 85% of the specified nominal thickness.
Example 1: (FH-YCW 3 + 95+1 35450/750V)
Stranding conductors, testing the resistance of a main line conductor and a ground wire conductor, wrapping the main line conductor and the ground wire conductor into mica tapes, extruding main line and ground wire ethylene-propylene insulation on a 120-sulfur production line, wherein the nominal values of the insulation thickness are 1.8mm and 1.4mm respectively, controlling the temperature of an extrusion host machine to be 40-95 ℃, extruding the speed to be 10-15m/min, controlling the steam pressure of a vulcanization pipeline to be 9-11Mpa, and performing a spark test on an insulation wire core to prepare a coil for cabling; 2500 cable forming machine carries out cable forming process, the center and the edge are filled with alkali-free glass yarn during cable forming, a glass fiber band is wrapped after cable forming, the cable forming pitch is not more than 14 times of the diameter of the main line, and the cable forming diameter is controlled to be 38.7-40.7mm according to the calculated value; after cabling is finished, performing a 2500V/5min voltage withstand test according to the voltage test standard of a finished product; extruding a ceramic silicon rubber fireproof layer on a 120 silicon rubber extrusion production line, wherein the nominal value of the extrusion thickness is 2.5mm, the outer diameter is controlled to be 43.7-45.7mm after extrusion, the extrusion linear speed is 10-12m/min, and the temperature of a drying tunnel is controlled to be 170 ℃; the outer sheath is finished on a 150 continuous sulfur production line, the nominal value of the extrusion thickness is 3.5mm, and the outer diameter is controlled to be 50.7-52.7mm after extrusion, (the outer diameter value is 44-55.4mm according to the corresponding specification standard of JB/T8735.3-2016). The finished product was tested routinely and passed the line integrity test for cables under flame conditions according to GB/T19216.21-2003.
Example 2 (FH-MY-0.38/0.663 x 95+1 x 25)
Stranding conductors, testing the resistance of a main line conductor and a ground line conductor, wrapping the conductors into a mica tape, extruding main line and ground line ethylene-propylene insulation on a 120-sulfur production line, wherein the nominal values of the insulation thickness are 2.2mm and 1.8mm respectively, controlling the temperature of an extrusion host machine to be 40-95 ℃, the extrusion speed to be 10-15m/min, the steam pressure of a vulcanization pipeline to be 9-11Mpa, carrying out a 3000V/5min soaking voltage test on an insulation wire core, testing the insulation resistance to be qualified, and preparing a tray for cabling; 2500 cable forming machine carries out cable forming process, the center and the edge are filled with alkali-free glass yarn during cable forming, a glass fiber band is wrapped after cable forming, the cable forming pitch is not more than 14 times of the diameter of the main line, and the cable forming diameter is controlled to be 40-43mm according to the calculated value; carrying out 3000V/5min voltage withstand test according to the voltage test standard of the finished product after cabling is finished; extruding a ceramic silicon rubber fireproof layer on a 120 silicon rubber extrusion production line, wherein the nominal value of the extrusion thickness is 3.5mm, the outer diameter is controlled to be 47-50.6mm after extrusion, the extrusion linear speed is 10-12m/min, and the temperature of a drying tunnel is controlled to be 170 ℃ plus 160 ℃; the outer sheath is finished on a 150 continuous sulfur production line, the nominal value of the extrusion thickness is 4mm, the outer diameter after extrusion is controlled to be 55-59.2mm, (the outer diameter value specified by the corresponding specification standard of MT818.5-2009 is 52.5-59.5 mm). The finished product was tested routinely and passed the line integrity test for cables under flame conditions according to GB/T19216.21-2003.
TABLE 1 partial comparison of the properties of example 1 with existing YCW cables
| Performance index | FH-YCW | |
| Cable specification | ||
| 3*95+1*35 | 3*95+1*35 | |
| Conductor material and properties | Are identical to each other | Are identical to each other |
| Mica tape wrapped outside conductor | Is provided with | Is free of |
| Insulating material | Are identical to each other | Are identical to each other |
| Nominal thickness of insulation | Are identical to each other | Are identical to each other |
| Insulation performance requirement | Are identical to each other | Are identical to each other |
| Center and edge fill material | Alkali-free glass yarn | Rubber filling strip |
| Cabling back belt material | Glass fiber tape | Non-woven fabric |
| Ceramic silicon rubber fireproof layer | Is provided with | Is free of |
| Thickness of ceramic silicon rubber fireproof layer | 2.5mm | Is free of |
| Outer sheath material | High-strength cold-resistant flame-retardant sheath | Common flame-retardant sheath |
| Sheath strength | >13Mpa | >7Mpa |
| Nominal thickness of sheath | 3.5mm | 5.3mm |
| Outer diameter range of finished cable | 50.7mm-52.7mm | 44mm-55.4mm |
TABLE 1 partial comparison of example 1 with existing YCW Cable Performance
TABLE 2 comparison of example 2 with existing MY cable part Performance
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A flexible fireproof rubber-sheathed flexible cable is characterized by comprising a flexible copper conductor (1), a synthetic mica tape (2) is lapped and wound outside the soft copper conductor (1), ethylene propylene insulating rubber (3) is extruded and wrapped on the outer layer of the synthetic mica tape (2), the soft copper conductor (1), the synthetic mica tape (2) and the ethylene propylene insulating rubber (3) form a wire core, a plurality of wire cores are made into a cable core through a cabling machine, the center position of the cable core is filled with alkali-free glass yarn to form a center filling layer (4), the periphery of the cable core is filled with alkali-free glass yarns to form an edge filling layer (5) so that the cross section of the cable core forms a regular circle, the cable core is externally overlapped with a glass fiber tape (6), a ceramic silicon rubber fireproof layer (7) is arranged outside the glass fiber tape (6), and an outer sheath (8) is arranged outside the ceramic silicon rubber fireproof layer (7) to form the cable.
2. A flexible fire-resistant cabtyre flexible cable according to claim 1, wherein said flexible copper conductor (1) is a fifth type of flexible copper conductor to ensure the flexible characteristics of the cable.
3. A flexible fire-resistant rubber-jacketed flexible cable according to claim 1, characterized in that the synthetic mica tape (2) is lapped over not less than 50% of the tape width.
4. A flexible fire-resistant rubber-sheathed flexible cable according to claim 1, wherein the ethylene-propylene insulating rubber (3) has a thinnest point of not less than 90% of the nominal thickness.
5. A flexible fire-resistant cabtyre cable according to claim 1, wherein said glass fiber tape (6) is provided with two layers.
6. The flexible fireproof cabtyre cable according to claim 1, wherein the core of the soft copper conductor (1), the synthetic mica tape (2) and the ethylene propylene insulating rubber (3) comprises three main wires and one ground wire.
7. A manufacturing method of a flexible fireproof rubber-sheathed flexible cable is characterized by comprising the following specific steps:
selecting a fifth type of soft copper conductor, twisting the conductor, testing the resistance of a main line conductor and a ground wire conductor after twisting is finished, and wrapping the conductor to form a mica tape after the resistance of the conductor is qualified;
sending the conductor wrapped with the synthetic mica tape to a continuous vulcanization extrusion production line to complete an ethylene propylene insulating rubber extruding process, performing a spark test after the ethylene propylene insulating rubber extruding process is completed, and testing the elongation of the insulating strength;
step three, after the elongation rate of the tested insulation strength is qualified, the cabling machine completes the cabling of the multi-core cable, the center and the edge of the multi-core cable are both filled with alkali-free glass yarns, and the filling diameter is determined by taking the cable roundness as a reference;
wrapping two layers of glass fiber tapes outside the cabling cable core, and carrying out a voltage withstand test on the cabling cable core according to the test voltage specified by the finished product;
step five, finishing the extrusion of the ceramic silicon rubber fireproof layer on a silicon rubber extrusion production line after the pressure resistance test is qualified;
and step six, finishing the extrusion process of the outer sheath on a continuous sulfur extrusion production line after the ceramic silicon rubber fireproof layer is extruded to form a cable product.
8. The method of claim 7, wherein the sixth step is completed by performing routine tests and testing the integrity of the cable under flame conditions according to GB/T19216.21-2003.
9. The method as claimed in claim 7, wherein the lapping cover of the synthetic mica tape in the first step is not less than 50% of the tape width, and the lapping cover of the glass fiber tape in the fourth step is not less than 50% of the tape width.
10. The method for manufacturing a flexible fireproof rubber-sheathed flexible cable according to claim 7, wherein the thinnest point of the ethylene-propylene insulating rubber extruded in the second step is not less than 90% of the nominal thickness, the thinnest point of the fireproof layer of the ceramic silicon rubber in the fifth step is not less than 85% of the specified nominal thickness, and the thinnest point of the outer sheath in the sixth step is not less than 85% of the specified nominal thickness.
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| CN201910969854.3A CN110690002A (en) | 2019-10-12 | 2019-10-12 | Flexible fireproof rubber-sheathed flexible cable and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910969854.3A CN110690002A (en) | 2019-10-12 | 2019-10-12 | Flexible fireproof rubber-sheathed flexible cable and manufacturing method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203536031U (en) * | 2013-09-13 | 2014-04-09 | 江苏远洋东泽电缆股份有限公司 | Ship and warship shield cable high in current carrying capacity and low in surface temperature rise |
| CN104916353A (en) * | 2015-05-22 | 2015-09-16 | 上海亨公电线电缆有限公司 | Ceramic silicon rubber insulated cable capable of resisting high temperature of 1000 DEG C |
| CN204857266U (en) * | 2015-08-22 | 2015-12-09 | 深圳市东佳信电线电缆有限公司 | Novel do not take flexible fireproof cable of metal sheath |
| CN105469860A (en) * | 2015-12-31 | 2016-04-06 | 天长市富信电子有限公司 | Mining power cable and production technology thereof |
| CN205984376U (en) * | 2016-08-19 | 2017-02-22 | 扬州市金鑫电缆有限公司 | Novel environment -friendly fireproof control cable |
-
2019
- 2019-10-12 CN CN201910969854.3A patent/CN110690002A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203536031U (en) * | 2013-09-13 | 2014-04-09 | 江苏远洋东泽电缆股份有限公司 | Ship and warship shield cable high in current carrying capacity and low in surface temperature rise |
| CN104916353A (en) * | 2015-05-22 | 2015-09-16 | 上海亨公电线电缆有限公司 | Ceramic silicon rubber insulated cable capable of resisting high temperature of 1000 DEG C |
| CN204857266U (en) * | 2015-08-22 | 2015-12-09 | 深圳市东佳信电线电缆有限公司 | Novel do not take flexible fireproof cable of metal sheath |
| CN105469860A (en) * | 2015-12-31 | 2016-04-06 | 天长市富信电子有限公司 | Mining power cable and production technology thereof |
| CN205984376U (en) * | 2016-08-19 | 2017-02-22 | 扬州市金鑫电缆有限公司 | Novel environment -friendly fireproof control cable |
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Application publication date: 20200114 |