CN114883047B - Polyethylene insulation low-voltage multi-core shielding control cable - Google Patents
Polyethylene insulation low-voltage multi-core shielding control cable Download PDFInfo
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- CN114883047B CN114883047B CN202210619131.2A CN202210619131A CN114883047B CN 114883047 B CN114883047 B CN 114883047B CN 202210619131 A CN202210619131 A CN 202210619131A CN 114883047 B CN114883047 B CN 114883047B
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- retardant
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- -1 Polyethylene Polymers 0.000 title claims abstract description 25
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 25
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 25
- 238000009413 insulation Methods 0.000 title abstract description 13
- 239000003063 flame retardant Substances 0.000 claims abstract description 57
- 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 claims abstract description 56
- 230000003139 buffering effect Effects 0.000 claims abstract description 48
- 230000001050 lubricating effect Effects 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims description 25
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 239000011888 foil Substances 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 8
- 238000003892 spreading Methods 0.000 claims description 7
- 239000006260 foam Substances 0.000 claims description 6
- 210000002268 wool Anatomy 0.000 claims description 4
- 238000005461 lubrication Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 16
- 229920000742 Cotton Polymers 0.000 abstract description 10
- 238000001125 extrusion Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000005062 Polybutadiene Substances 0.000 description 4
- 229920002857 polybutadiene Polymers 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000017105 transposition Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- 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
-
- 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
Landscapes
- Insulated Conductors (AREA)
- Communication Cables (AREA)
Abstract
The invention relates to the technical field of control cables, in particular to a polyethylene insulation low-voltage multi-core shielding control cable, which comprises a buffer core, an inner buffer layer, an outer buffer layer, an electric control layer, an outer shielding layer and an outer sheath, wherein the outer shielding layer comprises a shielding belt and a buffer strip fixedly arranged on one side of the shielding belt, a lubricating belt is fixedly arranged on the other side of the shielding belt, and the shielding belt is spirally wrapped outside the outer buffer layer to form the outer shielding layer; the conductive units are mutually extruded when being twisted, the buffering flame-retardant strips circumferentially arranged at intervals with the conductive units can effectively provide buffering, after the torsional force is cancelled, under the action of the elastic belt made of the pearl cotton, the buffering flame-retardant strips are elastically restored, after the elastic belt made of the pearl cotton is twisted for many times for a long time, the elastic belt made of the pearl cotton still has good elastic restoration performance, elastic restoration force is provided for cable restoration after torsional deformation, permanent deformation of the cable is prevented, and the shielding effect of the cable is ensured.
Description
Technical Field
The invention relates to the technical field of control cables, in particular to a polyethylene insulation low-voltage multi-core shielding control cable.
Background
The plastic insulation control cable is suitable for the transmission lines for occasions such as automatic control or monitoring systems with the alternating current rated voltage of 450/750V or below, connection of electric appliances and meters, and the like, after the control cable is put into operation, the problem of electric interference exists between different wire cores of the same cable and between cables which are laid in close proximity and parallel, when high-voltage and high-current interference sources exist in close proximity, the electric interference is more serious, and the normal operation of the control cable is seriously influenced, so that the electromagnetic shielding resistance of the control cable is particularly important.
Because the inside control wire of plastic insulation control cable is more, and the transposition each other for control wire is attached together each other, when the cable lays or uses on equipment such as robot, arm etc. control action is more, the movement range of equipment is great, the frequency of movement is higher, make control cable rock torsion by a wide margin for a long time high frequency, because control wire is the spiral transposition, when the cable twists reverse, control wire can follow the circumference and the axial mutual extrusion of cable, the shielding layer of control wire takes place deformation damage easily under the pressure effect, electromagnetic shield's effect is reduced, simultaneously, twist reverse the metal shielding area that the outside spiral was lapped and cause great obtain the pulling force, the metal shielding area is drawn the damage easily.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a polyethylene insulation low-voltage multi-core shielding control cable, which comprises:
the outer side of the buffer core is sequentially provided with two electric power control layers with opposite twisting directions;
an inner buffer layer, wherein the inner buffer layer is coated outside the electric power control layer;
the outer buffer layer is coated outside the electric power control layer;
the electric control layer is formed by twisting a plurality of conductive units and buffering flame-retardant strips which are arranged at intervals;
the outer shielding layer is coated on the outer side of the outer buffer layer;
the outer sheath is coated on the outer side of the outer shielding layer;
the outer shielding layer comprises a shielding belt and a buffer strip fixedly arranged on one side of the shielding belt, a lubricating belt is fixedly arranged on the other side of the shielding belt, the shielding belt is spirally wrapped on the outer side of the outer buffer layer to form the outer shielding layer, the buffer strip is in contact with the outer buffer layer, the lubricating belt is covered on the outer side of the upper section and is located at one end of the buffer strip, and a covering part is formed by wrapping.
Preferably, the conductive unit comprises a conductive wire core and an insulating layer extruded outside the conductive wire core, and an inner shielding layer for shielding electromagnetic interference is wrapped outside the insulating layer.
Preferably, the inner shielding layer is an aluminum foil foam layer.
Preferably, the buffering flame-retardant strip comprises an elastic belt for elastic buffering and a flame-retardant layer positioned on the inner side of the elastic belt and used for flame retardance, the elastic belt and the flame-retardant layer are integrally wrapped to form the buffering flame-retardant strip, and the diameter of the buffering flame-retardant strip is the same as that of the conductive unit.
Preferably, the elastic belt is a pearl cotton belt.
Preferably, the flame retardant layer is an expanded graphite layer.
Preferably, the lubricating tape is an aluminum foil layer.
Preferably, the lubricating strip is a conductive graphite layer.
Preferably, the thickness of the outer sheath is 3mm.
The processing technology of the polyethylene insulation low-voltage multi-core shielding control cable comprises the following steps:
step 1, manufacturing a conductive unit, extruding and wrapping the outer side of a conductive wire core by adopting an extruder to form an insulating layer, and wrapping the outer side of the insulating layer by adopting a winding machine to form an inner shielding layer;
step 2, manufacturing a buffering flame-retardant strip, spreading a flame-retardant layer on the surface of an elastic belt, and then rolling the elastic belt to form the buffering flame-retardant strip;
step 3, manufacturing an inner power control layer, wherein a stranding machine is adopted to twist corresponding numbers of the conductive units and the buffering flame-retardant strips on the outer side of the buffering core to form the power control layer, and the conductive units and the buffering flame-retardant strips are arranged at intervals;
step 4, manufacturing an inner buffer layer, wherein the outer side of the electric control layer in the step is extruded by an extruder to form the inner buffer layer, and the thickness of the inner buffer layer is 2mm;
step 5, manufacturing an outer power control layer, wherein the power control layer is formed by stranding the corresponding number of conductive units and the buffering flame-retardant strips on the outer side of the inner buffer layer by adopting a stranding machine, and the conductive units and the buffering flame-retardant strips are arranged at intervals;
step 6, manufacturing an outer buffer layer, and extruding and wrapping the outer side of the electric control layer in the step by adopting an extruder to form the outer buffer layer, wherein the thickness of the outer buffer layer is 2mm;
step 7, manufacturing an outer shielding layer, wrapping the shielding tape with a buffer strip and a lubricating tape adhered to two sides of the shielding tape on the outer side of the outer buffering layer by using a winding machine, wherein the lubricating tape is covered on the outer side of the upper section and is positioned at one end of the buffer strip, and the covering rate of the outer shielding layer is 25% -30%;
and 8, manufacturing an outer sheath, and extruding and wrapping the outer side of the outer shielding layer by using an extruder to form the outer sheath.
Compared with the prior art, the invention has the advantages that:
the conductive units are mutually extruded when twisting, the buffering flame-retardant strips circumferentially arranged at intervals with the conductive units can effectively provide buffering, the inner shielding layer of the conductive units is prevented from being damaged, after the twisting force is cancelled, under the action of the elastic belt made of pearl cotton, the buffering flame-retardant strips are elastically restored, after the elastic belt made of pearl cotton is twisted for a plurality of times for a long time, the elastic belt made of pearl cotton still has good elastic restoration energy performance, elastic restoration force is provided for cable restoration after twisting deformation, the cable is prevented from being permanently deformed, the shielding effect of the cable is ensured, when the diameter of the spiral wrapped shielding belt is reduced due to twisting of the cable, the buffering strips can effectively buffer the shielding belt in a spiral state, the tension of the shielding belt due to twisting is reduced, and the integral shielding effect of the shielding belt is ensured.
It should be understood that all combinations of the foregoing concepts, as well as additional concepts described in more detail below, may be considered a part of the inventive subject matter of the present disclosure as long as such concepts are not mutually inconsistent. In addition, all combinations of claimed subject matter are considered part of the disclosed inventive subject matter.
The foregoing and other aspects, embodiments, and features of the present teachings will be more fully understood from the following description, taken together with the accompanying drawings. Other additional aspects of the invention, such as features and/or advantages of the exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of the embodiments according to the teachings of the invention.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a polyethylene insulated low voltage multi-core shielding control cable according to the present invention;
fig. 2 is a schematic diagram of the hierarchical structure of the polyethylene insulated low-voltage multi-core shielding control cable according to the present invention;
FIG. 3 is a schematic diagram of the conductive unit structure of the polyethylene insulated low voltage multi-core shielding control cable of the present invention;
FIG. 4 is a schematic view of a buffer flame retardant strip of the polyethylene insulated low voltage multi-core shielding control cable of the invention;
fig. 5 is a schematic view of the outer shielding layer structure of the polyethylene insulated low-voltage multi-core shielding control cable according to the present invention;
fig. 6 is a schematic view of the outer shield wrap of the polyethylene insulated low voltage multi-core shield control cable of the present invention.
Detailed Description
For a better understanding of the technical content of the present invention, specific examples are set forth below, along with the accompanying drawings.
Aspects of the invention are described in this disclosure with reference to the drawings, in which are shown a number of illustrative embodiments. The embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, may be implemented in any of a number of ways, as the disclosed concepts and embodiments are not limited to any implementation. Additionally, some aspects of the disclosure may be used alone or in any suitable combination with other aspects of the disclosure.
Because the internal deformation buffer distance of the existing plastic insulation control cable is smaller, when the cable is paved or applied to equipment with more control actions such as robots and mechanical arms, the movement amplitude of the equipment is larger, the movement frequency is higher, the control cable can swing and twist greatly at a high frequency for a long time, when the cable is twisted, the control wires can be mutually extruded along the circumferential direction and the axial direction of the cable to generate overlarge pressure, the shielding layer of the control wires is easy to deform and damage under the action of the overlarge pressure, the electromagnetic shielding effect is reduced, and meanwhile, the metal shielding belt twisted on the outside spiral winding is greatly pulled, so that the metal shielding belt is easy to be pulled and damaged, the polyethylene insulation low-voltage multi-core shielding control cable is needed, and when the cable is twisted, the torsion resistance of the shielding layer of the control wires and the metal shielding belt is improved, and the damage risk is reduced.
As shown in fig. 1, 2, 3 and 4, the present invention provides a polyethylene insulation low-voltage multi-core shielding control cable, which comprises a buffer core 1, a conductive unit 2, a buffer flame retardant strip 3, an inner buffer layer 4, an outer buffer layer 5, an outer shielding layer 6 and an outer sheath 7.
Wherein, the outside of buffer core 1 is equipped with two electric control layers that the transposition direction is opposite in proper order, and electric control layer is stranded through a plurality of interval arrangement's conductive unit 2 and the fire-retardant strip 3 of buffering and is formed.
In an alternative embodiment, the buffer core 1 is made of butadiene rubber, and has the characteristics of high elasticity, good wear resistance, good flexibility and good dynamic performance, and can effectively buffer the extrusion force generated by the conductive unit 2 when the cable is twisted.
Further, the conductive unit 2 includes a conductive core 21 and an insulating layer 22 extruded on the outer side thereof, and an inner shielding layer 23 for shielding electromagnetic interference is wrapped on the outer side of the insulating layer 22.
In an alternative embodiment, the conductive wire core 21 is an annealed copper wire, which has good conductivity and good flexibility, the insulating layer 22 is made of flame retardant PVC material, which has good insulating flame retardant effect, the inner shielding layer 23 is an aluminum foil foam layer, which is formed by wrapping aluminum foil foam, and the aluminum foil foam is formed by compounding soft pure aluminum foil and glass fiber, which has good shielding effect, good high temperature resistance, and good electromagnetic shielding effect on the conductive wire core 21, and also has the function of heat insulation.
Further, the buffering flame-retardant strip 3 comprises an elastic band 31 for elastic buffering and a flame-retardant layer 32 positioned on the inner side of the elastic band for flame retardance, the elastic band 31 and the flame-retardant layer 32 are integrally wrapped to form the buffering flame-retardant strip 3, and the diameter of the buffering flame-retardant strip 3 is the same as that of the conductive unit 2.
In an alternative embodiment, the elastic band 31 is a pearl cotton band, which has the characteristics of good deformation recovery, strong toughness and strong collision resistance, and simultaneously has good chemical resistance, the flame retardant layer 32 is an expanded graphite layer, which has extremely strong flexibility and self-lubricity, and cannot cause excessive resistance to torsion and bending of the cable, and simultaneously, when encountering high temperature, the volume of the elastic band can be rapidly expanded to absorb heat, and when short circuit fusing fire occurs in the cable, the expanded graphite is rapidly expanded under the influence of the high temperature to rapidly absorb heat, thereby blocking a fire spreading channel and achieving the purpose of flame retardance.
So when the cable is twisted, the conductive unit 2 extrudes each other when twisting, the buffer flame-retardant strip 3 circumferentially arranged with the conductive unit 2 can effectively provide buffer to prevent the inner shielding layer 23 of the conductive unit 2 from being damaged, after the twisting force is cancelled, under the action of the elastic belt 31 made of pearl cotton, the buffer flame-retardant strip 3 is elastically restored, after the cable is twisted for a plurality of times for a long time, the elastic belt 31 made of pearl cotton still has good elastic restoration performance, the elastic restoration force is provided for the cable after the twisting deformation, the cable is prevented from being permanently deformed, the shielding effect of the cable is ensured, meanwhile, the expanded graphite wrapped in the elastic belt 31 is rapidly expanded when being influenced by high temperature, heat is rapidly absorbed, a fire spreading channel is blocked, and the flame retardant purpose is achieved.
Further, the inner buffer layer 4 is coated on the outer side of the inner power control layer, and the outer buffer layer 5 is coated on the outer side of the outer power control layer.
In an alternative embodiment, the inner buffer layer 4 and the outer buffer layer 5 are made of butadiene rubber, and the cable has the characteristics of high elasticity, good wear resistance, good flexibility and good dynamic performance, and can effectively buffer the extrusion force generated by the conductive units 2 when the cable is twisted, so as to prevent the conductive units 2 from being mutually extruded to cause the damage of the shielding layer.
As shown in fig. 1, 5 and 6, the outer shielding layer 6 is coated on the outer side of the outer buffer layer 5.
Further, the outer shielding layer 6 includes a shielding belt 61 and a buffer strip 62 fixedly disposed on one side of the shielding belt 61, a lubrication belt 63 is fixedly disposed on the other side of the shielding belt 61, the shielding belt 61 is spirally wrapped on the outer side of the outer buffer layer 5 to form the outer shielding layer 6, the buffer strip 62 is in contact with the outer buffer layer 5, the lubrication belt 63 is covered on the outer side of the upper section and is located at one end of the buffer strip 62, and a covering portion 601 is formed by wrapping.
In an alternative embodiment, the shielding tape 61 is a copper shielding tape, which has a good shielding effect, the buffer strip 62 is made of pearl wool, which has the characteristics of good deformation recovery, strong toughness and strong impact resistance, and still has good elastic recovery performance after being pressed for many times, and the lubricating tape 63 is an aluminum foil layer, which has conductivity and high strength, and is not easy to be damaged by friction when the cable is twisted.
In an alternative embodiment, the lubricating strip 63 is a conductive graphite layer, which has good electrical conductivity and has little effect on the shielding effect of the copper shielding strip 61.
Thus, when the diameter of the spirally wrapped shielding tape 61 is reduced due to the torsion of the cable, the buffer strips 62 can effectively buffer the shielding tape 61 in a spiral state, the tension of the shielding tape 61 due to the torsion is reduced, and simultaneously, when the shielding tape 61 rotates and rubs, the lubricating tape 63 made of aluminum foil or conductive graphite plays a role in lubricating, so that the shielding tape 61 is prevented from directly contacting and rubbing, and meanwhile, the whole shielding effect of the shielding tape 61 is ensured.
As shown in fig. 1, 2 and 5, the outer sheath 7 is wrapped around the outer shield layer 6.
Further, the thickness of the outer sheath 7 is 3mm, so that the effective protection effect of the outer sheath is ensured.
In an alternative embodiment, the outer sheath 7 is made of polyurethane, and has the characteristics of high strength, tear resistance and good wear resistance, so that the inside of the cable is effectively protected, and the normal operation of the cable is ensured.
The invention provides another technical scheme, namely a processing technology of the polyethylene insulation low-voltage multi-core shielding control cable according to the scheme, which comprises the following steps:
step 1, manufacturing a conductive unit 2:
1-1) extruding a flame-retardant PVC material to the outer side of the conductive wire core 21 by using an extruder to form an insulating layer 22;
1-2) wrapping the aluminum foil foam on the outer side of the insulating layer 22 by using a winding machine to form an inner shielding layer 23, wherein the soft pure aluminum foil is positioned on the outer side and the glass fiber is positioned on the inner side and attached to the insulating layer 22 during wrapping.
Step 2, manufacturing a buffering flame-retardant strip 3:
2-1) spreading the expanded graphite particles on the surface of the elastic belt 31 to form a flame-retardant layer 32, wherein the spreading thickness is 0.5mm;
2-2) the elastic band 31 laid with the expanded graphite particles is then wound up, and the diameter after winding up is the same as that of the conductive unit 2.
Step 3, manufacturing an inner power control layer:
the electric control layer is formed by stranding a corresponding number of conductive units 2 and buffering flame-retardant strips 3 on the outer side of the buffering core 1 by adopting a strander, and the conductive units 2 and the buffering flame-retardant strips 3 are arranged at intervals.
Step 4, manufacturing an inner buffer layer 4:
and (3) extruding butadiene rubber by adopting an extruder to form an inner buffer layer 4 outside the power control layer in the step (3), wherein the extrusion thickness of the inner buffer layer 4 is 2mm.
And 5, manufacturing an outer power control layer:
the electric control layer is formed by stranding the corresponding number of the conductive units 2 and the buffering flame-retardant strips 3 on the outer side of the inner buffer layer 4 by adopting a strander, and the conductive units 2 and the buffering flame-retardant strips 3 are arranged at intervals.
Step 6, manufacturing an outer buffer layer 5:
and (3) extruding butadiene rubber by adopting an extruder to form an outer buffer layer 5 outside the power control layer in the step (5), wherein the extrusion thickness of the outer buffer layer 5 is 2mm.
Step 7, manufacturing an outer shielding layer 6:
the shielding tape 61 with the buffer strip 62 and the lubricating tape 63 adhered to both sides thereof is wound on the outer side of the outer buffer layer 5 by using a winding machine, the lubricating tape 63 is covered on the outer side of the upper section and positioned at one end of the buffer strip 62, and the covering rate of the outer shielding layer 6 is 25% -30%.
Step 8, manufacturing an outer sheath 7:
the polyurethane was extruded outside the outer shield layer 6 using an extruder to form an outer sheath 7, and the extrusion thickness of the outer sheath 7 was 3mm.
In the above embodiment, when the cable is twisted, the conductive unit 2 is mutually extruded during twisting, the buffering flame-retardant strip 3 circumferentially arranged between the conductive unit 2 and the conductive unit 2 can effectively provide buffering, so that breakage of the inner shielding layer 23 of the conductive unit 2 is prevented, after the twisting force is removed, under the action of the elastic belt 31 made of pearl wool, the buffering flame-retardant strip 3 is elastically restored, after the cable is twisted for many times, the elastic belt 31 made of pearl wool still has good elastic restoration performance, elastic restoration force is provided for the cable after the twisting deformation, permanent deformation of the cable is prevented, the shielding effect of the cable is ensured, meanwhile, the expanded graphite wrapped in the elastic belt 31 is rapidly expanded under the influence of high temperature, heat is rapidly absorbed, a fire spreading channel is blocked, the purpose of flame retardation is achieved, when the diameter of the shielding belt 61 in a spiral state is reduced due to the twisting of the cable, the buffering strip 62 can effectively buffer the shielding belt 61 in a spiral state, the tensile force received by the twisting of the shielding belt 61 is reduced, meanwhile, the whole lubricating belt 63 made of aluminum foil material or the conductive graphite material is lubricated when the shielding belt 61 rotates and rubs, and the shielding belt 61 is prevented from contacting the shielding belt directly.
The result detection, the characteristics of this cable include:
1 torsion resistance
The product is detected, 180-degree repeated torsion is carried out on the cable with the length of 1m 10000 times, the cable is not obviously cracked and deformed, and the function is normal.
2) Flame retardant Properties
The product is detected, and the overall flame retardant property of the finished cable passes the national test standard of GB/T18380-2008.
3) Mechanical properties
The mechanical properties of the cable outer sheath pass the national test standards of GB/T2951.12-2008 and GB/T2951.21-2008 after detection.
While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Those skilled in the art will appreciate that various modifications and adaptations can be made without departing from the spirit and scope of the present invention. Accordingly, the scope of the invention is defined by the appended claims.
Claims (10)
1. A polyethylene insulated low voltage multi-core shielded control cable, comprising:
the outer side of the buffer core is sequentially provided with two electric power control layers with opposite twisting directions;
an inner buffer layer, wherein the inner buffer layer is coated outside the electric power control layer;
the outer buffer layer is coated outside the electric power control layer;
the electric control layer is formed by twisting a plurality of conductive units and buffering flame-retardant strips which are arranged at intervals;
the outer shielding layer is coated on the outer side of the outer buffer layer;
the outer sheath is coated on the outer side of the outer shielding layer;
the outer shielding layer comprises a shielding belt and a buffer strip fixedly arranged on one side of the shielding belt, a lubricating belt is fixedly arranged on the other side of the shielding belt, the shielding belt is spirally wrapped on the outer side of the outer buffer layer to form the outer shielding layer, the buffer strip is in contact with the outer buffer layer, the lubricating belt is covered on the outer side of the upper section and is located at one end of the buffer strip, and a covering part is formed by wrapping.
2. The polyethylene insulated low-voltage multi-core shielded control cable according to claim 1, wherein the conductive unit includes a conductive core and an insulating layer extruded on an outer side thereof, and an inner shielding layer for shielding electromagnetic interference is wrapped on the outer side of the insulating layer.
3. The polyethylene insulated low-voltage multi-core shielding control cable according to claim 2, wherein the inner shielding layer is an aluminum foil foam layer.
4. The polyethylene insulated low-voltage multi-core shielding control cable according to claim 1, wherein the buffering flame-retardant strip comprises an elastic band for elastic buffering and a flame-retardant layer positioned on the inner side of the elastic band for flame retardance, the elastic band and the flame-retardant layer are integrally wrapped to form the buffering flame-retardant strip, and the diameter of the buffering flame-retardant strip is the same as that of the conductive unit.
5. The polyethylene insulated low-voltage multi-core shielded control cable of claim 4, wherein the elastic tape is a pearl wool tape.
6. The polyethylene insulated low-voltage multi-core shielded control cable of claim 4, wherein the flame retardant layer is an expanded graphite layer.
7. The polyethylene insulated low voltage multi-core shielded control cable of claim 1, wherein the lubrication tape is an aluminum foil layer.
8. The polyethylene insulated low voltage multi-core shielded control cable of claim 1, wherein the lubricating tape is a conductive graphite layer.
9. The polyethylene insulated low-voltage multi-core shielded control cable of claim 1, wherein the thickness of the outer jacket is 3mm.
10. The process for manufacturing a polyethylene insulated low-voltage multi-core shielding control cable according to any one of claims 1 to 9, comprising the steps of:
step 1, manufacturing a conductive unit, extruding and wrapping the outer side of a conductive wire core by adopting an extruder to form an insulating layer, and wrapping the outer side of the insulating layer by adopting a winding machine to form an inner shielding layer;
step 2, manufacturing a buffering flame-retardant strip, spreading a flame-retardant layer on the surface of an elastic belt, and then rolling the elastic belt to form the buffering flame-retardant strip;
step 3, manufacturing an inner power control layer, wherein a stranding machine is adopted to twist corresponding numbers of the conductive units and the buffering flame-retardant strips on the outer side of the buffering core to form the power control layer, and the conductive units and the buffering flame-retardant strips are arranged at intervals;
step 4, manufacturing an inner buffer layer, wherein the outer side of the electric control layer in the step 3 is extruded by an extruder to form the inner buffer layer, and the thickness of the inner buffer layer is 2mm;
step 5, manufacturing an outer power control layer, wherein the power control layer is formed by stranding the corresponding number of conductive units and the buffering flame-retardant strips on the outer side of the inner buffer layer by adopting a stranding machine, and the conductive units and the buffering flame-retardant strips are arranged at intervals;
step 6, manufacturing an outer buffer layer, and extruding and wrapping the outer side of the electric control layer in the step 5 by adopting an extruder to form the outer buffer layer, wherein the thickness of the outer buffer layer is 2mm;
step 7, manufacturing an outer shielding layer, wrapping the shielding tape with a buffer strip and a lubricating tape adhered to two sides of the shielding tape on the outer side of the outer buffering layer by using a winding machine, wherein the lubricating tape is covered on the outer side of the upper section and is positioned at one end of the buffer strip, and the covering rate of the outer shielding layer is 25% -30%;
and 8, manufacturing an outer sheath, and extruding and wrapping the outer side of the outer shielding layer by using an extruder to form the outer sheath.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210619131.2A CN114883047B (en) | 2022-06-01 | 2022-06-01 | Polyethylene insulation low-voltage multi-core shielding control cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210619131.2A CN114883047B (en) | 2022-06-01 | 2022-06-01 | Polyethylene insulation low-voltage multi-core shielding control cable |
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| CN114883047A CN114883047A (en) | 2022-08-09 |
| CN114883047B true CN114883047B (en) | 2023-11-07 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020021701A (en) * | 2018-08-03 | 2020-02-06 | 東京特殊電線株式会社 | Multicore communication cable |
| CN213635440U (en) * | 2020-12-29 | 2021-07-06 | 江西新吉电缆有限公司 | Cross-linked polyethylene insulated copper wire shielding low-smoke halogen-free flame-retardant environment-friendly control cable |
| CN214796831U (en) * | 2021-06-02 | 2021-11-19 | 安徽龙联智能光电有限公司 | Environment-friendly shielding control cable |
| CN114005584A (en) * | 2021-11-18 | 2022-02-01 | 无锡市华美电缆有限公司 | Anti-torsion shielding control cable |
| CN217361187U (en) * | 2022-06-01 | 2022-09-02 | 无锡市华美电缆有限公司 | Polyethylene insulation low-voltage multi-core shielding control cable |
-
2022
- 2022-06-01 CN CN202210619131.2A patent/CN114883047B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020021701A (en) * | 2018-08-03 | 2020-02-06 | 東京特殊電線株式会社 | Multicore communication cable |
| CN213635440U (en) * | 2020-12-29 | 2021-07-06 | 江西新吉电缆有限公司 | Cross-linked polyethylene insulated copper wire shielding low-smoke halogen-free flame-retardant environment-friendly control cable |
| CN214796831U (en) * | 2021-06-02 | 2021-11-19 | 安徽龙联智能光电有限公司 | Environment-friendly shielding control cable |
| CN114005584A (en) * | 2021-11-18 | 2022-02-01 | 无锡市华美电缆有限公司 | Anti-torsion shielding control cable |
| CN217361187U (en) * | 2022-06-01 | 2022-09-02 | 无锡市华美电缆有限公司 | Polyethylene insulation low-voltage multi-core shielding control cable |
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| CN114883047A (en) | 2022-08-09 |
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