CN117747186A - Shielded power line and preparation method thereof - Google Patents
Shielded power line and preparation method thereof Download PDFInfo
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- CN117747186A CN117747186A CN202311849519.2A CN202311849519A CN117747186A CN 117747186 A CN117747186 A CN 117747186A CN 202311849519 A CN202311849519 A CN 202311849519A CN 117747186 A CN117747186 A CN 117747186A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 14
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- 239000004020 conductor Substances 0.000 claims abstract description 47
- 239000000835 fiber Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000010410 layer Substances 0.000 claims description 340
- 238000004080 punching Methods 0.000 claims description 77
- 238000001125 extrusion Methods 0.000 claims description 60
- 238000004804 winding Methods 0.000 claims description 52
- 239000011248 coating agent Substances 0.000 claims description 25
- 238000000576 coating method Methods 0.000 claims description 25
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- 239000011888 foil Substances 0.000 claims description 15
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- 239000004642 Polyimide Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 229920001721 polyimide Polymers 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000008054 signal transmission Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 8
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Abstract
The invention relates to the technical field of power cables, in particular to a shielding power cable and a preparation method thereof, wherein the shielding power cable comprises an outer layer component, a power inner core and a signal inner core, the outer layer component comprises a first insulating layer, a fiber layer, an outer shielding layer, a hot melt film layer and a second insulating layer which are sequentially arranged from inside to outside, first through holes are uniformly distributed on the outer shielding layer, and the hot melt film layer penetrates through the first through holes after hot melt to connect the fiber layer, the outer shielding layer and the second insulating layer; the electric power supply inner core comprises a power supply conductor, an inner core insulating layer coated outside the power supply conductor, an inner core shielding layer coated outside the inner core insulating layer and a fixing layer coated on the inner core shielding layer; the signal inner core comprises at least two signal conductors, an insulating inner core and a signal shielding layer coated outside the insulating inner core. According to the invention, the shielding layers are arranged on each inner core, so that interference phenomenon can not occur in the use process of the power supply, and the stability of signal transmission and power supply transmission is ensured.
Description
Technical Field
The invention relates to the technical field of power cables, in particular to a shielding power cable and a preparation method thereof.
Background
With the continuous advancement of technology, the materials, manufacturing process and design of the power line are continuously improved. New materials, such as high conductivity, high strength metal alloys, are being used to make power wires to improve the quality and performance of the wires. Power cords find application in a variety of fields, including household, commercial and industrial facilities. Along with the rapid development of new energy fields, such as electric automobiles, solar energy, wind energy and the like, the requirements on power lines are also continuously improved.
The use of high quality power lines can reduce the conduction of interfering signals. The quality power line is generally provided with thicker insulating layers and shielding layers, so that electromagnetic interference can be effectively reduced. However, the existing power lines generally comprise a power conductor and a signal conductor, which are easy to interfere in use, so that further improvement on cable shielding design and production is needed.
Disclosure of Invention
In order to solve the problems, the shielding layer is arranged on each inner core, so that interference phenomenon can not occur in the using process of the power supply, the stability of signal transmission and power supply transmission is ensured, and the two inner cores are not interfered with each other. Meanwhile, an outer shielding layer is also arranged on the outer layer structure, so that external interference is avoided, and stability and reliability of the shielding power line and the preparation method are ensured.
The technical scheme adopted by the invention is as follows: the shielding power line comprises an outer layer component, a power supply inner core and a signal inner core, wherein the outer layer component comprises a first insulating layer, a fiber layer, an outer shielding layer, a hot melt film layer and a second insulating layer which are sequentially arranged from inside to outside, first through holes are uniformly distributed in the outer shielding layer, and the hot melt film layer penetrates through the first through holes after hot melting to connect the fiber layer, the outer shielding layer and the second insulating layer; the power supply inner core is at least provided with two groups, at least two groups of the power supply inner cores are arranged inside the outer layer component, and the power supply inner core comprises a power supply conductor, an inner core insulating layer coated outside the power supply conductor, an inner core shielding layer coated outside the inner core insulating layer and a fixing layer coated on the inner core shielding layer; the signal inner core comprises at least two signal conductors, an insulating inner core wrapping the at least two signal conductors through extrusion molding and a signal shielding layer wrapping the outer portion of the insulating inner core, wherein the fixing layer is used for connecting the inner core shielding layer with the signal shielding layer through extrusion molding, and the first insulating layer is fixedly connected with the fixing layer.
The scheme is further improved in that the first insulating layer and the fixed layer are integrally formed through polytetrafluoroethylene or polyimide in an extrusion molding mode.
A further improvement of the above solution is that the fiber layer is a polyester fiber layer.
The further improvement of the scheme is that the outer shielding layer is an aluminum foil layer, and the outer shielding layer is formed by sequentially and alternately winding two aluminum foil strips outside the fiber layer.
In a further improvement of the above scheme, the hot-melt film layer is a BOPE film, and the hot-melt film layer forms a fluid by hot melting, so as to connect the fiber layer, the outer shielding layer and the second insulating layer through the through holes.
The scheme is further improved in that the second insulating layer is formed by integrally extruding polytetrafluoroethylene or polyimide, so that the hot melt film layer and the shielding layer are coated.
According to the technical scheme, the power supply conductor is formed by mutually stranded copper wires with at least three strands, the inner core insulating layer is coated on the outer part of the power supply conductor through extrusion molding, and the inner core shielding layer is an aluminum foil layer.
The further improvement to above-mentioned scheme does, be provided with the hot melt adhesive layer between inner core shielding layer and the power conductor, the equipartition has the second through-hole on the inner core shielding layer, the both ends of second through-hole communicate inner core insulating layer fixed layer respectively, the hot melt adhesive layer is the BOPE film, the hot melt adhesive layer forms fluid in fixed layer extrusion molding in-process hot melt to will be connected inner core shielding layer and inner core insulating layer through the second through-hole.
The signal shielding layer is an aluminum foil layer, third through holes are uniformly distributed in the signal shielding layer, two ends of each third through hole are used for communicating the fixing layer with the insulating inner core, and the fixing layer wraps the third through holes and is connected to the outside of the insulating inner core during extrusion molding.
The preparation method of the shielding power line comprises a shielding winding device, wherein the shielding winding device comprises an unreeling component, a tension guiding component, a punching component, a converting component and a winding component; the winding assembly is used for winding the shielding tape, the unwinding assembly is used for unwinding the shielding tape to the tension guide assembly, the tension guide assembly is used for stretching the shielding tape, the punching assembly is used for punching holes in the shielding tape, the switching assembly is used for switching the punched shielding tape into a ninety-degree direction and then guiding the shielding tape into the winding assembly, and the winding assembly is used for winding the shielding tape.
The preparation method comprises the following steps:
step S1, preparing a power supply inner core: forming a power conductor by stranded wires, extruding the power conductor outside by extrusion molding equipment to cover an inner core insulating layer, and winding the inner core shielding layer outside the inner core insulating layer after unreeling, tension stretching guiding, punching and converting sequentially by a shielding winding device;
step S2, preparing a signal inner core: preparing at least two strands of signal conductors, extruding and coating the at least two strands of signal conductors on an insulating inner core through extrusion molding equipment, and winding the signal shielding layer outside the insulating inner core after unreeling, tension stretching guiding, punching and converting sequentially through a shielding winding device;
step S3, coating the outer layer component: and (3) unreeling at least two groups of power supply inner cores prepared in the step (S1) and at least one group of signal inner cores, performing primary extrusion molding, fixing and coating the power supply inner cores and the signal inner cores through extrusion molding equipment, integrally forming a first insulating layer in the extrusion molding process, coating a fiber layer on the outer part of the first insulating layer, winding the outer shielding layer outside the fiber layer after unreeling, stretching, guiding by tension, punching and converting sequentially through a shielding winding device, coating a layer of hot melt film layer on the outer shielding layer after coating the outer shielding layer, performing secondary extrusion molding through extrusion molding equipment, and coating a second insulating layer outside the hot melt film layer.
The tension guiding assembly comprises a leading-in tension roller and a leading-out tension roller, wherein the leading-in tension roller and the leading-out tension roller are respectively positioned at two sides of the punching assembly so as to flatly stretch the shielding belt on the punching assembly; the converting assembly includes horizontal converting rolls for guiding the perforated shielding tape out of the vertical converting rolls to the winding assembly via ninety degree conversion.
According to the technical scheme, the punching assembly comprises a hollow roller and a punching roller, wherein the periphery of the hollow roller is uniformly provided with punching holes, one end of each punching hole is communicated with an inner cavity of the hollow roller, the inner cavity of the hollow roller is connected with a vacuum negative pressure assembly so as to vacuumize the inner cavity, the periphery of the punching roller is uniformly provided with punching needles, the punching needles correspond to the punching holes, the punching needles are hollow needles, and scraps generated by punching of a shielding belt are led into the inner cavity from the punching holes during punching; the openings of the perforations are provided with flat angle convex edges so that the shielding tape is kept flat during perforation.
The further improvement to above-mentioned scheme is, the in-process of punching, hollow roller and the roller that punches rotate in step to punch the aluminium foil shielding tape that will pass through the syringe needle cooperation perforation that punches, will punch the sweeps that produces and pass through the inner chamber evacuation discharge.
In the step S3, the second insulating layer is made of polytetrafluoroethylene, the hot-melt film layer is BOPE, and is heated by a mold in the process of secondary extrusion, and in the process of heating, the hot-melt adhesive film is hot-melted when being coated by the second insulating layer, and passes through the first through hole after being hot-melted to connect the fiber layer, the outer shielding layer and the second insulating layer.
The invention has the beneficial effects that:
compared with the existing power line, the power line is integrated with the power inner core and the signal inner core, the power inner core and the signal inner core are fixedly connected through the fixing layer, the outer layer component is coated outside, the shielding layer is arranged on each inner core, interference phenomenon can not occur in the using process of the power, the stability of signal transmission and power transmission is ensured, and the two inner cores are not interfered with each other. Meanwhile, an outer shielding layer is also arranged on the outer layer structure, so that external interference is avoided, and stability and reliability are ensured.
In addition, set up the hot melt rete on outer subassembly, permeate first through-hole through the hot melt rete after the hot melt and connect fibrous layer, outer shielding layer and second insulating layer, carry out hot melt through the hot melt rete and connect for fibrous layer, outer shielding layer and second insulating layer are connected more stably, can not appear layering phenomenon, and then guarantee the wholeness of structure. The first through hole is formed in the outer shielding layer, the shielding effect can be improved through the effect of the through hole, and the through hole can be used for penetrating and connecting the hot-melt film after hot melting.
In the preparation method, firstly, the power supply inner core forms a power supply conductor through a plurality of strands of copper wires, then an inner core insulating layer is coated outside through extrusion molding equipment, and an inner core shielding layer is wound outside the inner core insulating layer through a shielding winding device. Secondly, the signal inner core is also coated with the insulating inner core through extrusion molding of the signal conductor, and then the signal shielding layer is wound outside the insulating inner core through the shielding winding device. The preparation process ensures good insulating performance of the signal inner core, and enhances the transmission performance of signals. And furthermore, through the cladding step of the outer layer component, the power supply inner core and the signal inner core are unreeled and then subjected to primary extrusion molding, the power supply inner core and the signal inner core are fixedly clad by the fixing layer, and the first insulating layer is integrally formed in the extrusion molding process. This step ensures the insulating properties of the product, while the coating of the fibrous layer enhances the mechanical strength and durability of the product. Finally, the cladding of the outer shielding layer and the hot melt film layer and the cladding of the second insulating layer formed by secondary extrusion molding further enhance the shielding performance and the insulating performance of the product, and meanwhile, the cladding of the fiber layer and the hot melt film layer also enhances the softness and the connection stability of the product.
Drawings
FIG. 1 is a schematic perspective view of a shielded power cord of the present invention;
FIG. 2 is a schematic front view of the shielded power cord of FIG. 1;
FIG. 3 is a perspective view of the outer member of the shielded electrical power cord of FIG. 1;
FIG. 4 is a schematic perspective view of the power core of the shielded power cord of FIG. 1;
FIG. 5 is a schematic perspective view of the signal core of the shielded power cord of FIG. 1;
FIG. 6 is a schematic view of a shield winding apparatus according to the present invention;
fig. 7 is a schematic perspective view of the shield winding apparatus of fig. 6;
fig. 8 is an enlarged schematic view at a in fig. 7.
Reference numerals illustrate: outer member 1, first insulating layer 11, fibrous layer 12, outer shield layer 13, first via 131, hot melt film layer 14, second insulating layer 15, power core 2, power conductor 21, core insulating layer 22, core shield layer 23, second via 231, fixing layer 24, signal core 3, signal conductor 31, insulating core 32, signal shield layer 33, third via 331;
shield winding device 4, unreeling assembly 41, tension guiding assembly 42, lead-in tension roller 421, lead-out tension roller 422, punching assembly 43, hollow roller 431, punching 4311, punching roller 432, punching needle 4321, converting assembly 44, horizontal converting roller 441, vertical converting roller 442, and winding assembly 45.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1 to 5, in one embodiment of the present invention, a shielded power cord is related to, including an outer layer component 1, a power core 2 and a signal core 3, where the outer layer component 1 includes a first insulating layer 11, a fiber layer 12, an outer shielding layer 13, a hot melt film layer 14 and a second insulating layer 15 sequentially disposed from inside to outside, first through holes 131 are uniformly distributed on the outer shielding layer 13, and the hot melt film layer 14 penetrates the first through holes 131 to connect the fiber layer 12, the outer shielding layer 13 and the second insulating layer 15 after hot melt; the power supply inner core 2 is provided with at least two groups, at least two groups of the power supply inner cores 2 are arranged inside the outer layer component 1, and the power supply inner core 2 comprises a power supply conductor 21, an inner core insulating layer 22 coated outside the power supply conductor 21, an inner core shielding layer 23 coated outside the inner core insulating layer 22 and a fixing layer 24 coated outside the inner core shielding layer 23; the signal core 3 comprises at least two signal conductors 31, an insulating core 32 wrapping at least two signal conductors 31 by extrusion molding, and a signal shielding layer 33 wrapping outside the insulating core 32, the fixing layer 24 is used for connecting the core shielding layer 23 and the signal shielding layer 33 by extrusion molding, and the first insulating layer 11 is fixedly connected with the fixing layer 24. In this embodiment, the power supply inner core 2 and the signal inner core 3 are integrated on the power supply wire and are fixedly connected through the fixing layer 24, the outer layer component 1 is coated outside, the shielding layer is arranged on each inner core, the interference phenomenon can not occur in the power supply using process, the stability of signal transmission and power supply transmission is ensured, and the two inner cores are not interfered with each other. Meanwhile, an outer shielding layer 13 is also arranged on the outer layer structure, so that external interference is avoided, and stability and reliability are ensured.
In the above embodiment, the hot-melt film layer 14 is disposed on the outer layer component 1, the fiber layer 12, the outer shielding layer 13 and the second insulating layer 15 are connected by penetrating the first through hole 131 after hot-melt film layer 14, and the fiber layer 12, the outer shielding layer 13 and the second insulating layer 15 are connected by hot-melt film layer 14 more stably, so that layering phenomenon is avoided, and structural integrity is ensured.
In the above embodiment, the outer member 1 having a multi-layered structure includes the first insulating layer 11, the fiber layer 12, the outer shielding layer 13, the hot melt film layer 14 and the second insulating layer 15, so that the shielding effect is effectively improved and the electromagnetic interference is prevented from being transmitted. The first through hole 131 is designed to allow the hot melt film layer 14 to penetrate, and connect the fiber layer 12, the outer shielding layer 13 and the second insulating layer 15, thereby enhancing the continuity and integrity of the shielding layer.
In the above embodiment, the two sets of the power supply core 2, including the power supply conductor 21, the core insulating layer 22, the core shielding layer 23 and the fixing layer 24, ensure the electrical performance of the power supply line, and meanwhile, the shielding effect of the power supply line is enhanced by the arrangement of the core shielding layer 23 and the fixing layer 24. The key parts of the power conductor 21, the inner core insulating layer 22, the inner core shielding layer 23, the signal conductor 31 of the signal inner core 3 and the like are all wrapped in the corresponding insulating material and shielding material, so that the electromagnetic interference resistance of the power line is further improved.
In the above embodiment, the signal shielding layer 33 of the signal core 3 is further enhanced in signal transmission quality by the extrusion-coated insulating core 32, while the fixing layer 24 is used for connecting the core shielding layer 23 and the signal shielding layer 33 by extrusion molding, ensuring stable connection of the core shielding layer 23 and the signal shielding layer 33, preventing signal leakage and interference.
The first insulating layer 11 and the fixing layer 24 are integrally formed by extrusion molding of polytetrafluoroethylene or polyimide, and in this embodiment, in order to ensure the integration of the first insulating layer 11 and the fixing layer 24, the first insulating layer 11 and the fixing layer 24 are integrally formed by extrusion molding in the production process, and preferably are integrally formed by extrusion molding of polytetrafluoroethylene.
The fiber layer 12 is a polyester fiber layer 12, and in this embodiment, the fiber layer 12 can increase the flexibility and durability of the electric wire, so that the electric wire is more suitable for occasions requiring bending, stretching or twisting.
The outer shielding layer 13 is an aluminum foil layer, and the outer shielding layer 13 is at least formed by sequentially and alternately winding two aluminum foil strips outside the fiber layer 12, in this embodiment, at least two pieces of the aluminum foil strips are alternately wound, so that the coverage degree of the outer shielding layer 13 is ensured, and the shielding effect is further improved.
The hot melt film layer 14 is a BOPE film, the hot melt film layer 14 forms fluid by hot melt to pass through the through hole and connect the fiber layer 12, the outer shielding layer 13 and the second insulating layer 15, in this embodiment, BOPE is adopted as the hot melt film layer 14, and the hot melt connection is performed by heating after cladding, so that the stability and the integrity of the hot melt connection of the structure are ensured, and the layering phenomenon cannot occur.
The second insulating layer 15 is made of polytetrafluoroethylene or polyimide through integral extrusion molding, so as to cover the hot melt film layer 14 and the shielding layer, and in this embodiment, a covering outer layer formed by polytetrafluoroethylene extrusion molding is preferably adopted, so that the structure is reliable.
The power conductor 21 is formed by at least three strands of copper wires stranded with each other, the inner core insulating layer 22 is coated on the outer part of the power conductor 21 through extrusion molding, and the inner core shielding layer 23 is an aluminum foil layer. In this embodiment, the twisted wire is composed of a plurality of wires, so that the contact area can be increased, thereby enhancing the conductivity, reducing the resistance, and making the current transmission more efficient. The heat generated by the power line when carrying current is also reduced due to the reduced resistance, which helps to extend the service life of the device and reduces the likelihood of failure due to overheating.
A hot melt adhesive layer is arranged between the inner core shielding layer 23 and the power supply conductor 21, second through holes 231 are uniformly distributed on the inner core shielding layer 23, two ends of the second through holes 231 are respectively communicated with the fixing layer 24 of the inner core insulating layer 22, the hot melt adhesive layer is a BOPE film, and the hot melt adhesive layer is subjected to hot melt forming fluid in the extrusion molding process of the fixing layer 24 so as to connect the inner core shielding layer 23 with the inner core insulating layer 22 through the second through holes 231. In this embodiment, the function of the hot-melt adhesive layer is the same as that of the hot-melt film layer 14, and the adjacent structures are welded after hot-melt, so that the structural stability and reliability are improved. The design of the second through hole 231 can increase shielding effect, and meanwhile, the connection can be performed through the hot melt adhesive, so that reliability is improved.
The signal shielding layer 33 is an aluminum foil layer, third through holes 331 are uniformly distributed on the signal shielding layer 33, two ends of each third through hole 331 are used for communicating the fixing layer 24 with the insulating inner core 32, and the fixing layer 24 wraps the third through holes 331 and is connected to the outside of the insulating inner core 32 during extrusion molding.
Referring to fig. 1 to 8, a method for preparing a shielded power cord includes a shielding winding device 4, wherein the shielding winding device 4 includes an unreeling component 41, a tension guiding component 42, a punching component 43, a converting component 44 and a winding component 45; the unreeling component 41 is used for unreeling the shielding tape to the tension guiding component 42, the tension guiding component 42 is used for stretching the shielding tape in tension, the punching component 43 is used for punching the shielding tape, the switching component 44 is used for switching the shielding tape after punching into a ninety-degree direction and then guiding the shielding tape to the reeling component 45, and the reeling component 45 is used for winding the shielding tape.
The preparation method comprises the following steps:
step S1, preparing a power supply inner core 2: forming a power conductor 21 by stranded wires, extruding the power conductor 21 outside by extrusion molding equipment to cover an inner core insulating layer 22, and winding an inner core shielding layer 23 outside the inner core insulating layer 22 after unreeling, tension stretching guiding, punching and converting sequentially by a shielding winding device 4;
step S2, preparing a signal inner core 3: preparing at least two signal conductors 31, extruding and coating the insulating inner core 32 by extrusion molding equipment through at least two signal conductors 31, and winding the signal shielding layer 33 outside the insulating inner core 32 after unreeling, tension stretching guiding, punching and converting sequentially through a shielding winding device 4;
step S3, the outer layer component 1 is coated with: unreeling at least two groups of power supply inner cores 2 and at least one group of signal inner cores 3 prepared in the step S1, performing primary extrusion molding, fixing the power supply inner cores 2 and the signal inner cores 3 through an extrusion molding device, fixedly coating the power supply inner cores 2 and the signal inner cores 3 through an extrusion molding device, integrally forming a first insulating layer 11 in the extrusion molding process, coating a fiber layer 12 on the outer part of the first insulating layer 11, winding an outer shielding layer 13 outside the fiber layer 12 after unreeling, tension stretching guiding, punching and converting sequentially through a shielding winding device 4, coating a layer of hot melt film layer 14 on the outer shielding layer 13 after coating the outer shielding layer 13, and finally performing secondary extrusion molding through the extrusion molding device, and coating a second insulating layer 15 on the outer part of the hot melt film layer 14.
In the preparation method, firstly, the power supply inner core 2 is coated with the inner core insulating layer 22 through extrusion molding equipment after being formed into the power supply conductor 21 by a plurality of copper wire strands, and the inner core shielding layer 23 is wound outside the inner core insulating layer 22 through the shielding winding device 4, so that the preparation process ensures that the power supply inner core 2 has good conductivity, has obvious shielding effect and can effectively prevent electromagnetic interference and electric leakage. Next, the signal core 3 is also extrusion coated with the insulating core 32 via the signal conductor 31, and the signal shielding layer 33 is wound on the outside of the insulating core 32 via the shielding winding device 4. Such a preparation process ensures good insulation properties of the signal core 3 while enhancing signal transmission properties. Furthermore, through the cladding step of the outer member 1, the power core 2 and the signal core 3 are unreeled and then subjected to one extrusion molding, the fixing layer 24 is used for fixing and cladding the power core 2 and the signal core 3, and the first insulating layer 11 is integrally formed in the extrusion molding process. This step ensures the insulating properties of the product, while the coating of the fibrous layer 12 enhances the mechanical strength and durability of the product. Finally, the coating of the outer shielding layer 13 and the hot melt film layer 14 and the coating of the second insulating layer 15 formed by secondary extrusion molding further enhance the shielding performance and insulating performance of the product, and the coating of the fiber layer 12 and the hot melt film layer 14 also enhances the softness and connection stability of the product.
The tension guiding assembly 42 comprises a leading-in tension roller 421 and a leading-out tension roller 422, and the leading-in tension roller 421 and the leading-out tension roller 422 are respectively positioned at two sides of the punching assembly 43 so as to flatly stretch the shielding tape on the punching assembly 43; in this embodiment, the shielding tape is stretched by the combination of the lead-in tension roller 421 and the lead-out tension roller 422, so that the flatness after stretching is ensured, the effect is better during punching, and the wrinkling phenomenon can not occur.
The converting assembly 44 includes a horizontal converting roll 441 and a vertical converting roll 442, the horizontal converting roll 441 being configured to direct the perforated shielding tape from the vertical converting roll 442 to the winding assembly 45 through a ninety degree conversion. In this embodiment, the winding direction of the shielding tape is adjusted by the horizontal converting roller 441 and the vertical converting roller 442, so that the shielding tape is wound on the wire better at the time of winding. In order to make the shielding tape smoother when the angle is switched, oblique switching rollers are provided at the horizontal switching roller 441 and the vertical switching roller 442 for switching the guide, ensuring smoothness in the switching process.
The punching assembly 43 comprises a hollow roller 431 and a punching roller 432, wherein the periphery of the hollow roller 431 is uniformly provided with punching holes 4311, one end of each punching hole 4311 is communicated with the inner cavity of the hollow roller 431, the inner cavity of the hollow roller 431 is connected with a vacuum negative pressure assembly (not shown in the figure) so as to vacuumize the inner cavity, the periphery of the punching roller 432 is uniformly provided with punching needles 4321, the punching needles 4321 correspond to the punching holes 4311, and the punching needles 4321 are hollow needles, and chips generated by punching a shielding belt are led into the inner cavity from the punching holes 4311 during punching; the openings of the perforations 4311 are provided with flat corner ledges to keep the shielding tape flat during perforation. In the punching process, the hollow roller 431 and the punching roller 432 synchronously rotate so as to punch the passing aluminum foil shielding tape through the punching needle 4321 and the punching hole 4311, and waste scraps generated by punching are vacuumized and discharged through the inner cavity. The perforating needle 4321 adopts a needle structure, a perforating cambered surface is arranged at the front end, and scraps are fed into the inner cavity after being inserted into the perforating hole 4311, so that the scraps are separated from the shielding tape.
In step S3, during the secondary extrusion process, the second insulating layer 15 is made of polytetrafluoroethylene, the hot-melt film layer 14 is BOPE, and is heated by a mold, and during the heating process, the hot-melt adhesive film is hot-melted when being coated by the second insulating layer 15, and passes through the first through hole 131 to connect the fiber layer 12, the outer shielding layer 13 and the second insulating layer 15 after hot-melting. In this embodiment, since the melting point of BOPE is lower than that of polytetrafluoroethylene, BOPE can be thermally melted by the temperature of the shaping process in the extrusion molding process, so that BOPE fusion fiber layer 12, outer shielding layer 13 and second insulating layer 15 can ensure structural connection stability.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A shielded power cord, characterized by: comprising
The outer layer component comprises a first insulating layer, a fiber layer, an outer shielding layer, a hot melt film layer and a second insulating layer which are sequentially arranged from inside to outside, wherein first through holes are uniformly distributed in the outer shielding layer, and the hot melt film layer penetrates through the first through holes after hot melt to connect the fiber layer, the outer shielding layer and the second insulating layer;
the power supply inner core is at least provided with two groups, at least two groups of the power supply inner cores are arranged inside the outer layer assembly, and the power supply inner core comprises a power supply conductor, an inner core insulating layer coated outside the power supply conductor, an inner core shielding layer coated outside the inner core insulating layer and a fixing layer coated on the inner core shielding layer; and
the signal inner core comprises at least two signal conductors, an insulating inner core wrapping the at least two signal conductors through extrusion molding and a signal shielding layer wrapping the outer portion of the insulating inner core, wherein the fixing layer is used for connecting the inner core shielding layer with the signal shielding layer through extrusion molding, and the first insulating layer is fixedly connected with the fixing layer.
2. The shielded power cord of claim 1, wherein: the first insulating layer and the fixed layer are integrally formed by polytetrafluoroethylene or polyimide through extrusion molding;
the fiber layer is a polyester fiber layer.
3. The shielded power cord of claim 1, wherein: the outer shielding layer is an aluminum foil layer, and at least two aluminum foil strips are sequentially and alternately wound outside the fiber layer;
the hot melt film layer is a BOPE film, and fluid is formed by hot melt of the hot melt film layer so as to penetrate through the through holes to connect the fiber layer, the outer shielding layer and the second insulating layer;
and the second insulating layer is formed by integrally extruding polytetrafluoroethylene or polyimide so as to cover the hot melt film layer and the shielding layer.
4. The shielded power cord of claim 1, wherein: the power supply conductor is formed by mutually stranded copper wires with at least three strands, the inner core insulating layer is coated outside the power supply conductor through extrusion molding, and the inner core shielding layer is an aluminum foil layer.
5. The shielded power cord of claim 1, wherein: the hot melt adhesive layer is arranged between the inner core shielding layer and the power supply conductor, second through holes are uniformly distributed in the inner core shielding layer, two ends of each second through hole are respectively communicated with the inner core insulating layer fixing layer, the hot melt adhesive layer is a BOPE film, and the hot melt adhesive layer is subjected to hot melt forming fluid in the extrusion molding process of the fixing layer so as to connect the inner core shielding layer with the inner core insulating layer through the second through holes.
6. The shielded power cord of claim 1, wherein: the signal shielding layer is an aluminum foil layer, third through holes are uniformly distributed in the signal shielding layer, two ends of each third through hole are used for communicating the fixing layer with the insulating inner core, and the fixing layer wraps the third through holes and is connected to the outside of the insulating inner core during extrusion molding.
7. A method of manufacturing a shielded power cord according to any one of claims 1 to 6, characterized in that: the shielding winding device comprises an unreeling component, a tension guiding component, a punching component, a converting component and a winding component;
the winding assembly is used for winding the shielding tape, the unwinding assembly is used for unwinding the shielding tape to a tension guide assembly, the tension guide assembly is used for stretching the shielding tape, the punching assembly is used for punching holes in the shielding tape, the switching assembly is used for switching the punched shielding tape to a ninety-degree direction and then guiding the shielding tape to the winding assembly, and the winding assembly is used for winding the shielding tape;
the preparation method comprises the following steps:
step S1, preparing a power supply inner core: forming a power conductor by stranded wires, extruding the power conductor outside by extrusion molding equipment to cover an inner core insulating layer, and winding the inner core shielding layer outside the inner core insulating layer after unreeling, tension stretching guiding, punching and converting sequentially by a shielding winding device;
step S2, preparing a signal inner core: preparing at least two strands of signal conductors, extruding and coating the at least two strands of signal conductors on an insulating inner core through extrusion molding equipment, and winding the signal shielding layer outside the insulating inner core after unreeling, tension stretching guiding, punching and converting sequentially through a shielding winding device;
step S3, coating the outer layer component: and (3) unreeling at least two groups of power supply inner cores prepared in the step (S1) and at least one group of signal inner cores, performing primary extrusion molding, fixing and coating the power supply inner cores and the signal inner cores through extrusion molding equipment, integrally forming a first insulating layer in the extrusion molding process, coating a fiber layer on the outer part of the first insulating layer, winding the outer shielding layer outside the fiber layer after unreeling, stretching, guiding by tension, punching and converting sequentially through a shielding winding device, coating a layer of hot melt film layer on the outer shielding layer after coating the outer shielding layer, performing secondary extrusion molding through extrusion molding equipment, and coating a second insulating layer outside the hot melt film layer.
8. The method of manufacturing a shielded power cord according to claim 7, wherein: the tension guiding assembly comprises a leading-in tension roller and a leading-out tension roller, and the leading-in tension roller and the leading-out tension roller are respectively positioned at two sides of the punching assembly so as to flatly stretch the shielding belt on the punching assembly; the converting assembly includes horizontal converting rolls for guiding the perforated shielding tape out of the vertical converting rolls to the winding assembly via ninety degree conversion.
9. The method of manufacturing a shielded power cord according to claim 7, wherein: the punching assembly comprises a hollow roller and a punching roller, wherein the periphery of the hollow roller is uniformly provided with punching holes, one end of each punching hole is communicated with an inner cavity of the hollow roller, the inner cavity of the hollow roller is connected with a vacuum negative pressure assembly so as to vacuumize the inner cavity, the periphery of the punching roller is uniformly provided with punching needles, the punching needles correspond to the punching holes, the punching needles are hollow needles, and scraps generated by punching of the shielding belt are led into the inner cavity from the punching holes during punching; the opening of the perforation is provided with a flat angle convex edge so as to keep the shielding tape flat during perforation;
in the punching process, the hollow roller and the punching roller synchronously rotate so as to punch the aluminum foil shielding belt through the matching of the punching needle head and the punching hole, and waste generated by punching is vacuumized and discharged through the inner cavity.
10. The method of manufacturing a shielded power cord according to claim 7, wherein: in the step S3, during the secondary extrusion molding process, the second insulating layer is made of polytetrafluoroethylene, the hot-melt film layer is BOPE, and is heated by a mold, and during the heating process, the hot-melt adhesive film is hot-melted when being coated by the second insulating layer, and passes through the first through hole after hot melting to connect the fiber layer, the outer shielding layer and the second insulating layer.
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| CN202311849519.2A CN117747186B (en) | 2023-12-28 | 2023-12-28 | Shielded power line and preparation method thereof |
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| CN202311849519.2A CN117747186B (en) | 2023-12-28 | 2023-12-28 | Shielded power line and preparation method thereof |
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| CN117747186B CN117747186B (en) | 2024-05-24 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002075076A (en) * | 2000-08-31 | 2002-03-15 | Yazaki Corp | Shielded electric wire |
| WO2022052520A1 (en) * | 2020-09-14 | 2022-03-17 | 常州船用电缆有限责任公司 | Winding and dragging cable for overground mining engineering and production process |
| CN217902749U (en) * | 2022-07-13 | 2022-11-25 | 上海申远高温线有限公司 | Anti-electromagnetic interference medical cable |
| CN218455984U (en) * | 2022-09-13 | 2023-02-07 | 东莞市通宝电线电缆有限公司 | Electric wire and cable with protection function |
| CN219303358U (en) * | 2022-12-31 | 2023-07-04 | 浙江天杰实业股份有限公司 | Artificial intelligence data transmission cable |
-
2023
- 2023-12-28 CN CN202311849519.2A patent/CN117747186B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002075076A (en) * | 2000-08-31 | 2002-03-15 | Yazaki Corp | Shielded electric wire |
| WO2022052520A1 (en) * | 2020-09-14 | 2022-03-17 | 常州船用电缆有限责任公司 | Winding and dragging cable for overground mining engineering and production process |
| CN217902749U (en) * | 2022-07-13 | 2022-11-25 | 上海申远高温线有限公司 | Anti-electromagnetic interference medical cable |
| CN218455984U (en) * | 2022-09-13 | 2023-02-07 | 东莞市通宝电线电缆有限公司 | Electric wire and cable with protection function |
| CN219303358U (en) * | 2022-12-31 | 2023-07-04 | 浙江天杰实业股份有限公司 | Artificial intelligence data transmission cable |
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