CN114883047A - 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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- CN114883047A CN114883047A CN202210619131.2A CN202210619131A CN114883047A CN 114883047 A CN114883047 A CN 114883047A CN 202210619131 A CN202210619131 A CN 202210619131A CN 114883047 A CN114883047 A CN 114883047A
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- buffering
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- -1 Polyethylene Polymers 0.000 title claims abstract description 23
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 23
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 23
- 238000009413 insulation Methods 0.000 title description 9
- 239000003063 flame retardant Substances 0.000 claims abstract description 60
- 230000003139 buffering effect Effects 0.000 claims abstract description 56
- 230000001050 lubricating effect Effects 0.000 claims abstract description 19
- 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 description 46
- 238000004519 manufacturing process Methods 0.000 claims description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 239000011888 foil Substances 0.000 claims description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 11
- 239000006260 foam Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 210000002268 wool Anatomy 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 19
- 239000000463 material Substances 0.000 abstract description 13
- 229920000742 Cotton Polymers 0.000 abstract description 11
- 238000011084 recovery Methods 0.000 abstract description 11
- 238000001125 extrusion Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000017105 transposition Effects 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
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000005030 aluminium foil Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000007770 graphite material 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
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 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
- 230000001681 protective effect Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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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
-
- 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
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- Insulated Conductors (AREA)
- Communication Cables (AREA)
Abstract
The invention relates to the technical field of control cables, in particular to a polyethylene insulated low-voltage multi-core shielding control cable which comprises a buffer core, an inner buffer layer, an outer buffer layer, a power control layer, an outer shielding layer and an outer sheath, wherein the outer shielding layer comprises a shielding tape and a buffer strip fixedly arranged on one side of the shielding tape, a lubricating tape is fixedly arranged on the other side of the shielding tape, and the shielding tape is spirally wound on the outer side of the outer buffer layer to form the outer shielding layer; conductive element extrudees each other when twisting, can effectually provide the buffering with the fire-retardant strip of buffering that conductive element interval circumference was arranged, and after the torsional force was cancelled, under the elastic webbing effect of the cotton material of pearl, the fire-retardant strip elastic recovery of buffering, after twisting for a long time many times, the elastic webbing of the cotton material of pearl still has good elastic recovery ability performance, and the cable after twisting deformation resumes to provide elastic recovery power, prevents that the cable from taking place permanent deformation, guarantees the shielding effect of cable.
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 transmission lines used in occasions such as automatic control or monitoring systems and electric appliance instrument connection with the AC rated voltage of 450/750V and below, after the control cable is put into operation, the problem of electrical interference exists between different wire cores of the same cable and between cables laid next to the same cable in parallel, when high-voltage and high-current interference sources exist nearby, the electrical interference is more serious, and the normal work of the control cable is seriously affected, so that the electromagnetic shielding resistance of the control cable is particularly important.
Because the inside control wire of plastics insulation control cable is more, and the transposition each other, make the control wire attached together each other, lay or use the robot at the cable, when control action more equipment such as arm, the range of motion of equipment is great, the removal frequency is higher, make the control cable shake torsion by a wide margin for a long time high frequency, because the control wire is the spiral transposition, when the cable twists reverse, the control wire can be along the circumference and the axial extrusion each other of cable, the shielding layer of control wire takes place deformation damage easily under the pressure effect, reduce the effect of electromagnetic shield, simultaneously, it causes great obtaining pulling force to twist to the metal shielding area that the outside spiral wound package, the metal shielding area is damaged easily to be drawn.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a polyethylene insulated low-voltage multi-core shielding control cable, which comprises:
the outer side of the buffer core is sequentially provided with two power control layers with opposite twisting directions;
the inner buffer layer is coated outside the power control layer at the inner side;
the outer buffer layer is coated outside the power control layer on the outer side;
the electric control layer is formed by twisting a plurality of conductive units and buffer 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;
wherein, outer shielding layer includes shielding area and the fixed buffering strip that sets up in its one side, the fixed lubricating strip that is provided with of opposite side in shielding area, shielding area spiral is around the package outer buffer layer outside forms outer shielding layer, the buffering strip with outer buffer layer contacts, lubricating strip takes to cover in the last section outside and is located buffering strip one end is taken the lid around the package formation.
Preferably, the conductive unit comprises a conductive wire core and an insulating layer extruded on the outer side of the conductive wire core, and an inner shielding layer used for shielding electromagnetic interference is wound on the outer side of 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 for flame retardance positioned on the inner side of the elastic belt, 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 band is a pearl cotton band.
Preferably, the flame retardant layer is an expanded graphite layer.
Preferably, the lubricating strip is an aluminum foil layer.
Preferably, the lubricating strip is a conductive graphite layer.
Preferably, the outer sheath has a thickness of 3 mm.
The processing technology of the polyethylene insulation low-voltage multi-core shielding control cable comprises the following steps:
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:
conductive unit extrudees each other when twisting, can effectually provide the buffering with the fire-retardant strip of buffering that conductive unit interval circumference was arranged, prevent that conductive unit's internal shield layer from taking place the damage, cancel the back at the torsional force, under the elastic webbing effect of the cotton material of pearl, the fire-retardant strip elastic recovery of buffering, twist reverse the back for a long time many times, the elastic webbing of the cotton material of pearl still has good elastic recovery ability performance, the cable after the torsional deformation resumes to provide elastic recovery, prevent that the cable from taking place permanent deformation, guarantee the shielding effect of cable, when the shielding area that the spiral wound package was twisted round because of the cable and take place the phenomenon that the diameter reduces, the buffering strip can effectively cushion being in spiral state shielding area, reduce the pulling force that the shielding area received because of twisting, guarantee the whole shielding effect of shielding area.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of this disclosure unless such concepts are mutually inconsistent. In addition, all combinations of claimed subject matter are considered a part of the presently disclosed subject matter.
The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of specific embodiments in accordance with the teachings of the present 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 present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of a polyethylene insulated low-voltage multi-core shielded control cable according to the present invention;
fig. 2 is a schematic view of the hierarchical structure of the polyethylene insulated low-voltage multi-core shielded control cable according to the present invention;
FIG. 3 is a schematic diagram of the structure of the conductive unit of the polyethylene insulated low-voltage multi-core shielded control cable according to the present invention;
FIG. 4 is a schematic structural diagram of a buffering flame retardant strip of the polyethylene insulated low-voltage multi-core shielded control cable according to the present invention;
fig. 5 is a schematic view of the structure of the outer shielding layer of the polyethylene insulated low-voltage multi-core shielded control cable according to the present invention;
fig. 6 is a schematic view of the wrapping of the outer shielding layer of the polyethylene insulated low-voltage multi-core shielded control cable according to the present invention.
Detailed Description
In order to better understand the technical content of the present invention, specific embodiments are described below with reference to the accompanying drawings.
In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any one implementation. In addition, some aspects of the present disclosure may be used alone, or in any suitable combination with other aspects of the present disclosure.
Because the internal deformation buffer distance of the existing plastic insulation control cable is smaller, when the cable is laid or applied to equipment with more control actions such as robots, mechanical arms and the like, the equipment has larger moving amplitude and higher moving frequency, so that the control cable can greatly shake and twist with high frequency for a long time, when the cable is twisted, the control lead 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 lead is easy to deform and damage under the action of the overlarge pressure, the electromagnetic shielding effect is reduced, meanwhile, the twisting causes a large pulling force on the metal shielding tape spirally wound outside, and the metal shielding tape is easily damaged by pulling, so that a polyethylene insulated low-voltage multi-core shielding control cable is urgently needed, when the torsion occurs, the torsion resistance of the shielding layer of the control lead and the metal shielding belt is improved, and the damage risk is reduced.
Referring to fig. 1, 2, 3 and 4, the invention provides a polyethylene insulated low-voltage multi-core shielded control cable, which includes 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 opposite electric control layers of transposition direction in proper order, and electric control layer is twisted with 3 transposition of buffering fire-retardant strip through the electrically conductive unit 2 of a plurality of interval arrangement.
In an optional embodiment, the buffer core 1 is made of butadiene rubber, has the characteristics of high elasticity, good wear resistance, good flexing resistance 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 wire core 21 and an insulating layer 22 extruded on the outer side of the conductive wire core, and an inner shielding layer 23 for shielding electromagnetic interference is wrapped on the outer side of the insulating layer 22.
In an optional embodiment, the conductive wire core 21 adopts an annealed copper wire, which has good flexibility while ensuring good conductivity, the insulating layer 22 adopts a flame-retardant PVC material, which has good insulating flame-retardant effect, the inner shielding layer 23 is an aluminum foil foam layer formed by wrapping aluminum foil foam, the aluminum foil foam is formed by compounding a flexible pure aluminum foil and glass fibers, and has good shielding effect and good high temperature resistance, so that the conductive wire core 21 is effectively electromagnetically shielded, and the function of heat insulation is achieved.
Further, the buffering flame-retardant strip 3 comprises an elastic belt 31 for elastic buffering and a flame-retardant layer 32 for flame-retardant located at the inner side of the elastic belt 31, the elastic belt 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 the optional embodiment, elastic webbing 31 is the cotton area of pearl, it has that deformation recoverability is good, the characteristics that toughness is strong and anticollision is strong, and simultaneously, good anti-chemical performance has, fire-retardant layer 32 is the expanded graphite layer, it has extremely strong pliability and self-lubricity, can not cause too big resistance to the torsional bending of cable, and simultaneously, it is when meetting high temperature, but the volume rapid expansion, absorb the heat, when the short circuit fusing of taking place inside the cable is lighted a fire, the expanded graphite receives the quick expansion of high temperature influence, and absorb the heat fast, block up the intensity of a fire and spread the passageway, play fire-retardant purpose.
So, when the cable takes place to twist reverse, conductive element 2 extrudees each other when twisting, can effectually provide the buffering with the fire-retardant strip 3 of buffering that conductive element 2 interval circumference was arranged, prevent that conductive element 2's internal shield layer 23 from taking place the damage, after the torsional force cancels, under the elastic webbing 31 effect of the cotton material of pearl, the fire-retardant strip 3 elastic recovery of buffering, after twisting for a long time many times, the elastic webbing 31 of the cotton material of pearl still has good elastic recovery ability performance, the cable after twisting deformation resumes and provides elastic recovery power, prevent that the cable from taking place permanent deformation, guarantee the shielding effect of cable, and simultaneously, the inflation graphite of the interior package of elastic webbing 31 receives quick inflation when high temperature influences, and the heat is absorbed fast, block up the intensity of a fire and spread the passageway, play fire-retardant purpose.
Further, the outer side of the inner power control layer is coated with an inner buffer layer 4, and the outer side of the outer power control layer is coated with an outer buffer layer 5.
In an optional embodiment, the inner buffer layer 4 and the outer buffer layer 5 are made of butadiene rubber, and have the characteristics of high elasticity, good wear resistance, good flexing resistance and good dynamic performance, so that when the cable is twisted, the extrusion force generated by the conductive units 2 can be effectively buffered, and the damage of the shielding layer caused by the mutual extrusion of the conductive units 2 is prevented.
As shown in fig. 1, 5, and 6, the outer shield layer 6 covers the outer side of the outer buffer layer 5.
Further, outer shielding layer 6 includes shielding area 61 and the fixed buffering strip 62 that sets up in its one side, and the fixed lubricating strip 63 that is provided with of opposite side of shielding area 61, shielding area 61 spiral form outer shielding layer 6 around the package in outer buffer layer 5 outside, and buffering strip 62 and outer buffer layer 5 contact, lubricating strip 63 take to cover in last a lesson outside and lie in buffering strip 62 one end, form around the package and take lid 601.
In an optional embodiment, the shielding tape 61 is a copper shielding tape and has a good shielding effect, the buffering strip 62 is made of pearl cotton and has the characteristics of good deformation recovery, strong toughness and strong impact resistance, the buffering strip still has good elastic recovery performance after being pressed for many times, and the lubricating tape 63 is an aluminum foil layer and has conductivity and high strength, so that the cable is not easy to be damaged due to friction when twisted.
In an alternative embodiment, the lubricating strip 63 is a conductive graphite layer, which has good conductivity and has less influence on the shielding effect of the copper shielding strip 61.
So, twist reverse the phenomenon that takes place the diameter to reduce at the shielding area 61 that the spiral was wrapped because of the cable when, buffering strip 62 can effectively cushion being in spiral state shielding area 61, reduces shielding area 61 because of the tensile force that twists reverse the receipt, and simultaneously, during shielding area 61 rotational friction, the lubricated area 63 of aluminium foil material or conductive graphite material plays lubricated effect, prevents shielding area 61 direct contact friction, guarantees shielding area 61's whole shielding effect simultaneously.
As shown in fig. 1, 2, and 5, the outer sheath 7 covers the outer side of the outer shield layer 6.
Further, the thickness of oversheath 7 is 3mm, guarantees its effectual protective effect.
In an optional embodiment, the outer sheath 7 is made of a polyurethane material, and has the characteristics of high strength, tear resistance and good wear resistance, so that the interior of the cable is effectively protected, and the normal operation of the cable is ensured.
The invention provides another technical scheme, and the processing technology of the polyethylene insulation low-voltage multi-core shielding control cable comprises the following steps:
1-1) extruding the 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 outside the insulating layer 22 by using a winding machine to form an inner shielding layer 23, wherein during wrapping, the flexible 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.
2-1) flatly paving the expanded graphite particles on the surface of the elastic belt 31 to form a flame-retardant layer 32, wherein the paving thickness is 0.5 mm;
2-2) then rolling the elastic band 31 with the expanded graphite particles laid thereon, and the diameter after rolling is the same as that of the conductive unit 2.
adopt the stranding machine with corresponding quantity conductive element 2 and buffering fire-retardant strip 3 transposition at the outside of buffer core 1 and form the electric control layer, and conductive element 2 and buffering fire-retardant strip 3 are interval arrangement.
and 3, extruding the butadiene rubber by using an extruder to wrap the outer side of the power control layer in the step 3 to form an inner buffer layer 4, wherein the wrapping thickness of the inner buffer layer 4 is 2 mm.
adopt the stranding machine to strand corresponding quantity conductive element 2 and buffering fire-retardant strip 3 and form the electric control layer in the outside of buffer layer 4, and conductive element 2 and buffering fire-retardant strip 3 are interval arrangement.
and (3) extruding the butadiene rubber by using an extruder to wrap the outer side of the power control layer in the step (5) to form an outer buffer layer (5), wherein the wrapping thickness of the outer buffer layer (5) is 2 mm.
the shielding tape 61 with the buffer strips 62 and the lubricating tape 63 respectively adhered to the two sides is wrapped on the outer side of the outer buffer layer 5 by using a winding machine, the lubricating tape 63 is lapped on the outer side of the upper section and is positioned at one end of the buffer strips 62, and the lapping rate of the outer shielding layer 6 is 25% -30%.
Step 8, manufacturing an outer sheath 7:
polyurethane is extruded outside the outer shielding layer 6 by using an extruder to form the outer sheath 7, and the extrusion thickness of the outer sheath 7 is 3 mm.
To sum up, in the above embodiment, when the cable is twisted, the conductive units 2 are mutually extruded when being twisted, the buffering flame-retardant strips 3 circumferentially arranged at intervals with the conductive units 2 can effectively provide buffering to prevent the inner shielding layer 23 of the conductive units 2 from being damaged, after the twisting force is cancelled, the buffering flame-retardant strips 3 are elastically restored under the action of the elastic band 31 made of the pearl cotton material, after the cable is twisted for a plurality of times for a long time, the elastic band 31 made of the pearl cotton material still has good elastic restoring energy performance to provide elastic restoring force for the cable after being twisted and deformed to prevent the cable from being permanently deformed, thereby ensuring the shielding effect of the cable, meanwhile, the expanded graphite of the inner wrap of the elastic band 31 is rapidly expanded when being affected by high temperature, rapidly absorbs heat to block a fire spreading channel, thereby achieving the purpose of flame retardance, when the shielding band 61 of the spiral wrap is reduced in diameter due to the twisting of the cable, buffering strip 62 can effectively cushion being in helical state shielding area 61, reduces shielding area 61 because of the pulling force that twists reverse the receipt, and simultaneously, during shielding area 61 rotational friction, the lubricated area 63 of aluminium foil material or electrically conductive graphite material plays lubricated effect, prevents shielding area 61 direct contact friction, guarantees shielding area 61's whole shielding effect simultaneously.
As a result, the cable has the characteristics that:
1 resistance to torsion
The product is detected, the cable with the length of 1m is repeatedly twisted for 10000 times at 180 degrees, the cable is not obviously cracked and deformed, and the function is normal.
2) Flame retardant properties
The product is detected, and the integral flame retardant property of the finished cable passes the national test standard 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 the product is detected.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined 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 power control layers with opposite twisting directions;
the inner buffer layer is coated outside the power control layer at the inner side;
the outer buffer layer is coated outside the power control layer on the outer side;
the electric control layer is formed by twisting a plurality of conductive units and buffer 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;
wherein, outer shielding layer includes shielding area and the fixed buffering strip that sets up in its one side, the fixed lubricating strip that is provided with of opposite side in shielding area, shielding area spiral is around the package outer buffer layer outside forms outer shielding layer, the buffering strip with outer buffer layer contacts, lubricating strip takes to cover in the last section outside and is located buffering strip one end is taken the lid around the package formation.
2. The polyethylene insulated low-voltage multi-core shielding control cable as claimed in claim 1, wherein the conductive unit comprises a conductive wire core and an insulating layer extruded on the outer side of the conductive wire core, 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 shielded control cable as claimed in claim 2, wherein the inner shield layer is an aluminum foil foam layer.
4. The polyethylene-insulated low-voltage multi-core shielded control cable as claimed in claim 1, wherein the buffered flame-retardant strip comprises an elastic tape for elastic buffering and a flame-retardant layer for flame-retardant located inside the elastic tape, the elastic tape and the flame-retardant layer are integrally wrapped to form the buffered flame-retardant strip, and the diameter of the buffered flame-retardant strip is the same as that of the conductive unit.
5. The polyethylene-insulated low-voltage multi-core shielded control cable as claimed in claim 4, wherein the elastic tape is a pearl wool tape.
6. The polyethylene insulated low-voltage multi-core shielded control cable as claimed in 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 lubricating tape is an aluminum foil layer.
8. The polyethylene insulated low-voltage multi-core shielded control cable as claimed in 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 outer jacket has a thickness of 3 mm.
10. The processing technology of the polyethylene insulated low-voltage multi-core shielded control cable according to any one of claims 1 to 9, characterized by comprising the following steps:
step 1, manufacturing a conductive unit, namely extruding and wrapping the outer side of a conductive wire core by using an extruder to form an insulating layer, and then wrapping and forming an inner shielding layer on the outer side of the insulating layer by using a winding machine;
step 2, manufacturing a buffering flame-retardant strip, flatly paving 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 side power control layer, and twisting a corresponding number of the conductive units and the buffering flame-retardant strips on the outer side of the buffering core by using a twisting machine to form the power control layer, wherein the conductive units and the buffering flame-retardant strips are arranged at intervals;
step 4, manufacturing an inner buffer layer, and extruding and wrapping the outer side of the power control layer in the step 3 by using an extruder to form the inner buffer layer, wherein the thickness of the inner buffer layer is 2 mm;
step 5, manufacturing an outer power control layer, and twisting a corresponding number of the conductive units and the buffering flame-retardant strips on the outer side of the inner buffer layer by using a twisting machine to form the power control layer, wherein 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 power control layer in the step 5 by using an extruder to form the outer buffer layer, wherein the thickness of the outer buffer layer is 2 mm;
step 7, manufacturing an outer shielding layer, namely wrapping shielding tapes with buffer strips and lubricating tapes adhered to two sides respectively on the outer side of the outer buffer layer by using a winding machine, wherein the lubricating tapes are overlapped on the outer side of the upper section and positioned at one end of each buffer strip, and the overlapping 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.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114883047A true CN114883047A (en) | 2022-08-09 |
| CN114883047B CN114883047B (en) | 2023-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210619131.2A Active CN114883047B (en) | 2022-06-01 | 2022-06-01 | Polyethylene insulation low-voltage multi-core shielding control cable |
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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 |
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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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| CN114883047B (en) | 2023-11-07 |
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