CN113393973B - Preparation method of polyvinyl chloride insulated power cable - Google Patents
Preparation method of polyvinyl chloride insulated power cable Download PDFInfo
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- CN113393973B CN113393973B CN202110460438.8A CN202110460438A CN113393973B CN 113393973 B CN113393973 B CN 113393973B CN 202110460438 A CN202110460438 A CN 202110460438A CN 113393973 B CN113393973 B CN 113393973B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
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- 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
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The invention relates to the technical field of power cables, in particular to a preparation method of a polyvinyl chloride insulated power cable.
Description
Technical Field
The invention relates to the technical field of power cables, in particular to a preparation method of a polyvinyl chloride insulated power cable.
Background
The cable includes power cable, control cable, compensation cable, shielding cable, high temperature cable, computer cable, signal cable, coaxial cable, fire-resistant cable, marine cable, mining cable, aluminum alloy cable, etc.; they are composed of single or multi-strand wires and insulating layers, and are used for connecting circuits, electric appliances and the like.
The technical scheme of the preparation method of the power cable also appears in the prior art, for example, a chinese patent with application number CN201910167135X discloses a cable, which comprises a wiring pipe, wherein a sealed wiring cavity is arranged in the wiring pipe, two sides of the wiring cavity are sealed and are reserved with small outlet holes, the cable is arranged in the wiring cavity and is discharged from the small outlet holes, the outer layer of the cable passes through the small outlet holes in a sealed manner, the inner wall of the wiring cavity is fixedly bonded with more than one air suction part by surrounding the wiring cavity by a circle, an expansion part is arranged on the outer wall surface of the cable and is opposite to each air suction part, an air suction pipe is arranged between the corresponding expansion part and the air suction part, one end of the air suction pipe is inserted into the air suction part, and the expansion part is connected with the air suction part by the air suction pipe. The cable has very good shock resistance and protection capability, can be applied to various fields, and can utilize a heat source to evacuate air in a wiring pipe when short circuit fires, block the conditions of combustion fire and increase the safety;
in the prior art, the wiring, the small outlet holes, the expansion part and the air suction part are arranged, so that the cable has very good shock resistance and protection capability, can be applied to various fields, and can utilize a heat source to evacuate air in the wiring pipe when a short circuit fires to block the conditions of combustion and fire; however, when the invention is used under the road surface and in the pipeline, the cable surface is extruded by the force transmitted by the ground due to the influence of road construction, and the outer surface of the cable is damaged by the mice in the pipeline, so that the inner structure of the cable is influenced, and when the vibration generated on the ground is transmitted into the cable, the vibration is generated in the cable to influence the transmission of the current in the cable, thereby influencing the service efficiency and the service life of the cable.
In view of this, the present invention provides a method for preparing a polyvinyl chloride insulated power cable, which solves the above problems.
Disclosure of Invention
In order to make up the defects of the prior art, the cable solves the problems that the cable in the prior art has internal structure damage and internal vibration of the cable, and the use efficiency and the service life of the cable are influenced due to the fact that the surface vibration and the damage of rats in the pipeline to the surface of the cable when the cable is used under the construction ground and in the pipeline; the invention provides a preparation method of a polyvinyl chloride insulated power cable.
S1: at normal temperature, a wire drawing machine is utilized to pass through one or more die holes of a drawing die to reduce the cross section, increase the length and improve the strength of a copper rod and an aluminum rod, after heating is completed, a conductive wire core is obtained, and then the conductive wire core is formed by stranding a plurality of monofilaments to obtain a wire core inside a cable;
s2: extruding an insulating layer from the outer ring of the wire core obtained in the S1 in an extruding and wrapping mode, wherein the insulating layer is made of polyvinyl chloride, wrapping the insulating layer outside the wire core by using the extruded insulating material in a wrapping mode, and twisting the insulating layer into a round shape by using an extruding and wrapping machine;
s3: the shielding layer is wrapped on the outer ring of the insulating layer, the protective layer is wrapped on the outer ring of the insulating layer and made of polyvinyl chloride materials, and a protective net is arranged in the protective layer to protect the cable in all directions;
the cable manufactured in the S3 comprises a wire core, an insulating layer, a shielding layer and a protective layer, wherein the insulating layer wraps the outer surface of the wire core and is fixedly connected with the outer surface of the wire core; the protective layer wraps the outer surface of the shielding layer and is in sliding connection with the outer surface of the shielding layer, a latticed protective net is fixedly connected inside the protective layer, and the protective net is positioned on one side, far away from the shielding layer, inside the protective layer;
when the cable is used, the polyvinyl chloride insulated power cable is laid in a road surface and a pipeline, the insulating layer is fixedly connected to the outer surface of the wire core, electric arcs are generated when current flows in the wire core, and the insulating layer is arranged on the outer layer of the wire core, so that the cable is effectively prevented from being damaged by the electric arcs generated in the wire core, and the use efficiency and the safety degree of the cable are improved; when the cable is laid, the cable is easy to twist due to the long length of the cable, and the surface and the inside of the cable can be damaged due to the influence of torsion on the cable in the prior art for a long time; on one hand, when the cable is laid under a pipeline and a road surface and is constructed above the road surface, the road surface vibrates, force generated by the vibration is transmitted to the cable, the shielding layer is extruded, and the shielding layer is connected with the insulating layer in a sliding manner, so that the force transmitted to the wire core is reduced, and the damage to the inside of the wire core is reduced; through at the inside protection net that sets up of protective layer, and protection net becomes latticed, when producing vibrations in ground top and the pipeline, the performance is dragged in the tensile that protection net becomes latticed can improve the cable, and when the mouse with the road surface below in the pipeline destroys the cable, protection net network structure makes inside ring knot mutually, make the anti ability of tearing of protective layer promote, and carry out sliding connection between protective layer and the shielding layer, compare with the body structure among the above-mentioned prior art, the power of transmitting the shielding layer from the protective layer has been reduced, make the cable bear the performance increase of mechanical external force, thereby the problem among the above-mentioned prior art has been solved.
Preferably, the protection net is formed by connecting a plurality of blocks with X-shaped sections, and one end of the protection net, which is far away from the annular block, is made of magnesium oxide material;
when the cable is used, the cross section of the protection net is in an X shape, when construction is carried out above a road surface, force generated by ground vibration is transmitted to the cable, then the force is transmitted to the protection net in the protection layer, the X shape of the protection net is subjected to stress analysis, the protection net can disperse stress points of the cable, and force borne by one point of the cable is dispersed to the whole protection net, so that the influence of the external environment on the interior of the cable is reduced, the protection net is obtained through the stress analysis, the protection net disperses the force, the compression resistance of the cable is improved, the cable is prevented from being deformed due to vibration generated by road surface construction, and the service life of the cable is prolonged; the end, far away from the wire core, of the protection net is made of the magnesium oxide material, so that the hardness of the protection net is improved to a certain extent, and rats in the pipeline and below the road surface are not prone to damaging the surface of the cable, so that the problems in the prior art are solved.
Preferably, the shielding layer is in a ring wave shape, and an arch-shaped cavity is formed between adjacent contact points of the shielding layer and the protective layer; the contact point of the shielding layer adjacent to the insulating layer is an arched cavity;
when the shielding layer is in a ring-shaped wavy shape in use, when a road surface is constructed, the construction causes vibration to the ground, force generated by the vibration of the ground is transmitted to the cable, when the protective layer is stressed to extrude the shielding layer, the shielding layer is stressed, and the shielding layer disperses the stress through the shielding layer arranged in a wavy shape, so that the problem that one part of the cable is excessively stressed to cause local damage of the cable is avoided; through the wavy setting of shielding layer for annular, when external power extrudees the guard net, the protective layer atress extrudees the shielding layer, when power transmission to the both sides of protective layer and shielding layer contact point, because shielding layer and protective layer sliding connection, the shielding layer rotates, has reduced the atress size of shielding layer self to a certain extent, makes the inside structural damage degree of shielding layer reduce to the problem among the above-mentioned prior art has been reduced.
Preferably, the shielding material in the shielding layer is a high-elasticity copper sheet, and the high-elasticity copper sheet is wrapped inside the shielding layer;
when the cable is used below a road surface and in a pipeline, when construction is carried out above the road surface, the ground is influenced by the construction, vibration is generated on the ground, force generated by the vibration is transmitted to the cable below the ground, when the ground is severely vibrated, a protective layer on the cable is sunken, then the force is transmitted to the shielding layer through a protective net, and the high-elasticity copper sheet is wrapped inside the shielding layer, so that the contact between the high elasticity of the copper sheet and the protective layer and the insulating layer is avoided, and the internal structure of the high-elasticity copper sheet in the shielding layer is protected; the shielding layer is arranged in a wavy mode, when the cable is stressed, force is transmitted to the shielding layer, the shielding layer disperses the force, and the high-elasticity copper sheet inside is bent.
Preferably, the insulating layer is composed of an inner insulating layer and an outer insulating layer, the inner insulating layer is fixedly connected with the wire core, the outer insulating layer is connected with the shielding layer in a sliding mode, the inner insulating layer and the outer insulating layer are in clearance fit, an elastic block is arranged in the insulating layer, one end of the elastic block is fixedly connected with the inner insulating layer, the other end of the elastic block is fixedly connected with the outer insulating layer, and the elastic block is composed of insulating elastic rubber;
when the cable is used, the insulating layer is arranged inside the cable, the cable is composed of the inner insulating layer and the outer insulating layer by dividing the insulating layer, and the inner insulating layer and the outer insulating layer are in clearance fit, the outer insulating layer and the shielding layer are in sliding connection, when construction is carried out on a road surface, vibration is generated on the external environment of the cable, the shielding layer is in sliding connection with the outer insulating layer, the insulating layer is enabled to be distorted when vibration is generated, the insulating layer can be automatically reset, the inner part of the insulating layer and a cable core are enabled not to be subjected to distortion force, the service efficiency of the cable is improved, the elastic block is arranged between the inner insulating layer and the outer insulating layer, when current flows in the cable, the cable core is in contact with the inner insulating layer, the inner insulating layer is connected with the outer insulating layer through the elastic block, the elastic block is made of insulating elastic rubber, the current in the cable core is enabled not to be in contact with the outer insulating layer, the insulating layer is enabled to have an insulating effect, the insulating layer is enabled to play a cushioning effect, and the service efficiency and the service life of the cable are improved to a certain extent.
Preferably, arc blocks are uniformly arranged between the inner insulating layer and the outer insulating layer, the arc edges of the arc blocks and the wire cores form a concentric circle shape, one end of each arc block is fixedly connected with the outer insulating layer, the other end of each arc block is in clearance fit with the inner insulating layer, and each arc block is made of insulating elastic rubber;
during the use, through set up the arc piece in the insulating layer, arc piece one end links firmly with the outer insulating layer, on the one hand, when cable laying is in the road surface below, when the cable external environment shakes, if vibrations are violent, insulating intraformational sinle silk is dragged by the elastic block, rock in the insulating layer, when the inner insulating layer rocks, contact the arc piece, because arc piece material is insulating elastic rubber, make the inside sinle silk of inner insulating layer shake and reduce, thereby improve the availability factor of cable, on the other hand, when the sinle silk rocks, the sinle silk contacts the arc piece, the arc piece is insulating material, avoided the sinle silk to contact insulating layer exterior structure, thereby avoided the electric current in the sinle silk to produce the influence to insulating layer external environment, thereby the availability factor of cable has been increased.
The invention has the following beneficial effects:
1. according to the preparation method of the polyvinyl chloride insulated power cable, when vibration is generated in the external environment of the cable, the vibration force is transmitted to the shielding layer through the protective layer, the shielding layer is arranged in a net shape, so that the force is further reduced on the shielding layer, when the force is transmitted to the insulating layer through the shielding layer, the vibration force is separated by the semicircular supporting block when contacting the insulating layer through the semicircular supporting block, and therefore the damage of the force outside the cable to the interior of the cable is reduced, and the use efficiency of the cable is improved.
2. According to the preparation method of the polyvinyl chloride insulated power cable, when the cable is laid, the cable is twisted due to the fact that the length of the cable is long, the cable is influenced by torsion, the tensile property and the torsion resistance of the cable are improved through the meshed arrangement of the shielding layers, and therefore the situation that the cable is broken when used after being twisted is avoided.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a partial cross-sectional view of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is an enlarged view of a portion of FIG. 2 at B;
in the figure: the cable comprises a cable core 1, an inner insulating layer 11, an elastic block 111, an arc block 112, an outer insulating layer 12, a shielding layer 2, a protective layer 3 and a protective net 31.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 4, the method for preparing a polyvinyl chloride insulated power cable according to the present invention comprises the following steps:
s1: at normal temperature, a wire drawing machine is utilized to pass through one or more die holes of a drawing die to reduce the cross section, increase the length and improve the strength of a copper rod and an aluminum rod, after heating is completed, a conductive wire core 1 is obtained, and then the conductive wire core 1 is formed by stranding a plurality of monofilaments to obtain an inner wire core 1 of the cable;
s2: extruding an insulating layer on the outer ring of the wire core 1 obtained in the step S1 in an extruding and wrapping mode, wherein the insulating layer is made of polyvinyl chloride, wrapping the insulating layer on the outer part of the wire core 1 by using the extruded insulating material in a wrapping mode, and twisting the insulating layer into a round shape by using an extruding and wrapping machine;
s3: the shielding layer 2 is wrapped on the outer ring of the insulating layer, the protective layer 3 is wrapped on the outer ring of the shielding layer 2, the protective layer 3 is made of polyvinyl chloride materials, and the protective net 31 is arranged in the protective layer 3 to protect the cable in all directions;
the cable manufactured in the S3 comprises a wire core 1, an insulating layer, a shielding layer 2 and a protective layer 3, wherein the insulating layer wraps the outer surface of the wire core 1 and is fixedly connected with the outer surface of the wire core 1, the shielding layer 2 wraps the outer surface of the insulating layer, the shielding layer 2 is connected with the outer surface of the insulating layer in a sliding mode, and a high-elasticity copper sheet wraps the inside of the shielding layer 2; the protective layer 3 wraps the outer surface of the shielding layer 2, the protective layer 3 is connected with the outer surface of the shielding layer 2 in a sliding mode, a latticed protective net 31 is fixedly connected to the inside of the protective layer 3, and the protective net 31 is located on one side, far away from the shielding layer 2, of the inside of the protective layer 3;
when the cable is used, the polyvinyl chloride insulated power cable is laid in a road surface and a pipeline, the insulating layer is fixedly connected to the outer surface of the wire core 1, electric arcs are generated when current flows in the wire core 1, the insulating layer is arranged on the outer layer of the wire core 1, the electric arcs generated in the wire core 1 are effectively prevented from damaging the cable, and therefore the use efficiency and the safety degree of the cable are improved; when the cable is laid, the cable is easy to twist due to the fact that the length of the cable is long, the surface and the inside of the cable can be damaged due to the fact that the cable in the prior art is affected by torsion for a long time, compared with the prior art, the connection modes among the shielding layer 2, the protective layer 3 and the insulating layer are sliding connection, and when the protective layer 3 is subjected to torsion, the shielding layer 2 and the insulating layer slide and cannot be damaged; by arranging the shielding layer 2 outside the insulating layer, on one hand, when the cable is laid under a pipeline and a road surface and construction is carried out above the road surface, vibration is carried out above the road surface, force generated by the vibration is transmitted to the cable, the shielding layer 2 is extruded, and the shielding layer 2 is in sliding connection with the insulating layer, so that the force transmitted to the wire core 1 is reduced, and the damage to the inside of the wire core 1 is reduced; through at inside protection net 31 that sets up of protective layer 3, and protection net 31 becomes latticed, when ground top and pipeline in produce vibrations, protection net 31 becomes latticed can improve the anti performance of tearing of cable, and when the mouse with the road surface below in the pipeline destroys the cable, protection net 31 network structure makes inside ring phase detain, make protective layer 3's anti ability of tearing promote, and carry out sliding connection between protective layer 3 and the shielding layer 2, compare with integrative structure among the above-mentioned prior art, the power of transmitting to shielding layer 2 from protective layer 3 has been reduced, make the cable bear the performance increase of mechanical external force, thereby the problem among the above-mentioned prior art has been solved.
As a specific embodiment of the present invention, the protection net 31 is formed by connecting a plurality of blocks with a cross section X, and one end of the protection net 31 far away from the ring block 31 is made of magnesium oxide material;
when the cable is used, the cross section of the protection net 31 is in an X shape, when construction is carried out above a road surface, force generated by ground vibration is transmitted to the cable, then the force is transmitted to the protection net 31 in the protection layer 3, stress analysis is carried out on the X shape of the protection net 31, the protection net 31 can disperse stress points of the cable, and the force borne by one point of the cable is dispersed to the whole protection net 31, so that the influence of the external environment on the interior of the cable is reduced, the protection net 31 is obtained through the stress analysis, the protection net 31 disperses the force, the compression resistance of the cable is improved, the cable is prevented from being deformed due to the vibration generated by road surface construction, and the service life of the cable is prolonged; the end, far away from the wire core 1, of the protection net 31 is made of the magnesium oxide material, so that the hardness of the protection net 31 is improved to a certain degree, and rats in a pipeline and below a road surface are not easy to damage the surface of the cable, so that the problems in the prior art are solved.
As a specific embodiment of the present invention, the shielding layer 2 is in a ring wave shape, and an arch-shaped cavity is formed between adjacent contact points of the shielding layer 2 and the protective layer 3; the contact point of the shielding layer 2 adjacent to the insulating layer is an arched cavity;
when the shielding layer 2 is in an annular wavy shape, when a road is constructed, vibration is caused to the ground during construction, force generated by the vibration of the ground is transmitted to the cable, when the shielding layer 2 is extruded by the stress of the protective layer 3, the shielding layer 2 is stressed, and the stress on the shielding layer 2 is dispersed through the shielding layer 2 arranged in a wavy shape, so that the problem that the local damage of the cable is caused by the overlarge stress on one part of the cable is avoided; be annular wavy setting through shielding layer 2, when external power extrudees protecting net 31, 3 atress of protective layer extrude shielding layer 2, when the both sides of protective layer 3 and 2 contact points of shielding layer are transmitted to power, because shielding layer 2 and 3 sliding connection of protective layer, shielding layer 2 rotates, the atress size of shielding layer 2 self has been reduced to a certain extent, make the inside structural damage degree of shielding layer 2 reduce, thereby the problem among the above-mentioned prior art has been reduced.
As a specific embodiment of the present invention, the shielding material in the shielding layer 2 is a high-elasticity copper sheet, and the high-elasticity copper sheet is wrapped inside the shielding layer 2;
when the cable is used under the road surface and in a pipeline, when the road surface is constructed, the ground is influenced by construction, the ground generates vibration, the force generated by the vibration is transmitted to the cable under the ground, when the ground vibrates violently, the protective layer 3 on the cable generates depression, then the force is transmitted to the shielding layer 2 through the protective net 31, and the high-elasticity copper sheet is wrapped in the shielding layer 2, so that the high-elasticity copper sheet in the shielding layer 2 is prevented from contacting with the protective layer 3 and the insulating layer, and the internal structure is protected by the high-elasticity copper sheet in the shielding layer 2; the shielding layer 2 is arranged in a wavy mode, when the cable is stressed, force is transmitted to the shielding layer 2, the shielding layer 2 disperses the force, the internal high-elasticity copper sheet is bent, when the high-elasticity copper sheet is bent, the force applied to the high-elasticity copper sheet is offset, after the high-elasticity copper sheet is stressed, the high-elasticity copper sheet is arranged in the shielding layer 2 in an annular mode, when the high-elasticity copper sheet is locally stressed, the whole high-elasticity copper sheet extrudes the stress part to enable the high-elasticity copper sheet to reset, the high-elasticity copper sheet is extruded by the elasticity of the high-elasticity copper sheet and the whole high-elasticity copper sheet to reset, the whole cable resets after the high-elasticity copper sheet resets, and therefore elastic deformation of the cable is avoided, and the problem in the prior art is solved.
As a specific embodiment of the present invention, the insulating layer is composed of an inner insulating layer 11 and an outer insulating layer 12, the inner insulating layer 11 is fixedly connected with the wire core 1, the outer insulating layer 12 is slidably connected with the shielding layer 2, the inner insulating layer 11 and the outer insulating layer 12 are in clearance fit, an elastic block 111 is arranged in the insulating layer, one end of the elastic block 111 is fixedly connected with the inner insulating layer 11, the other end of the elastic block is fixedly connected with the outer insulating layer 12, and the elastic block 111 is composed of insulating elastic rubber;
when the cable is used, the insulating layer is arranged inside the cable, the insulating layer is divided into the inner insulating layer 11 and the outer insulating layer 12, the inner insulating layer 11 and the outer insulating layer 12 are in clearance fit, the outer insulating layer 12 is in sliding connection with the shielding layer 2, when construction is carried out on a road surface, vibration is generated in the external environment of the cable, the shielding layer 2 is in sliding connection with the outer insulating layer 12, the insulating layer is enabled to be distorted when vibration is generated, the insulating layer can be automatically reset, the inner portion of the insulating layer and the cable core 1 cannot be subjected to distortion force, the service efficiency of the cable is improved, the elastic block 111 is arranged between the inner insulating layer 11 and the outer insulating layer 12, when current flows in the cable, the cable core 1 is in contact with the inner insulating layer 11, the inner insulating layer 11 is connected with the outer insulating layer 12 through the elastic block 111, the elastic block 111 is made of insulating elastic rubber, the current in the cable core 1 cannot be in contact with the outer insulating layer 12, the insulating layer can play an insulating effect, the inner insulating layer 11 is connected with the outer insulating layer 12 through the elastic block 111, the insulating layer plays a buffering effect to a certain degree, and the service efficiency and the service life of the cable are prolonged to a certain degree.
As a specific embodiment of the present invention, an arc block 112 is uniformly arranged between the inner insulating layer 11 and the outer insulating layer 12, an arc edge of the arc block 112 and the wire core 1 form a concentric circle, one end of the arc block 112 is fixedly connected to the outer insulating layer 12, the other end of the arc block 112 is in clearance fit with the inner insulating layer 11, and the arc block 112 is made of insulating elastic rubber;
during the use, through set up arc piece 112 in the insulating layer, arc piece 112 one end links firmly with outer insulating layer 12, on the one hand, when cable laying is in the road surface below, when the cable external environment shakes, if vibrations are violent, insulating intraformational sinle silk 1 is dragged by elastic block 111, rock in the insulating layer, when inner insulating layer 11 rocks, contact arc piece 112, because arc piece 112 material is insulating elastic rubber, make 11 inside sinle silk 1 vibrations of inner insulating layer reduce, thereby improve the availability factor of cable, on the other hand, when sinle silk 1 rocks, sinle silk 1 contacts arc piece 112, arc piece 112 is insulating material, avoided sinle silk 1 to contact insulating layer exterior structure, thereby avoided the electric current in sinle silk 1 to produce the influence to insulating layer exterior environment, thereby the availability factor of cable has been increased.
The specific working process is as follows;
the outer surface of the wire core 1 is fixedly connected with the insulating layer, the shielding layer 2 is arranged outside the insulating layer, the outer ring of the shielding layer 2 is provided with the protective layer 3, the annular block 31 is arranged inside the protective layer 3, and the side, away from the wire core 1, of the annular block 31 is provided with the protective net 31, so that the use efficiency of the cable is improved to a certain extent, the performance of the cable for bearing mechanical external force is improved, and the use efficiency of the cable under tunnels, pipelines and pavements is improved; the protection net 31 is arranged in the protection layer 3, and the protection degree of the protection layer 3 on the internal structure of the cable is improved to a certain extent through the arranged protection net 31, so that each function of the internal structure of the cable can normally operate, and the service efficiency of the cable is improved by enabling the section of the protection net 31 to be X-shaped; the shielding layer 2 is arranged on the outer ring of the insulating layer, when a rail and a road pass through a vehicle, the external environment of the cable vibrates, and the shielding layer 2 reduces the influence of the external environment of the cable on the internal wire core 1 so as to improve the service efficiency of the cable; the shielding layer 2 and the insulating layer are arranged in the cable, so that when the external environment of the cable vibrates, the influence of the external environment of the cable on the interior of the cable is reduced to a certain extent, the use efficiency of the cable is increased when the cable is used below pipelines, tracks and roads, and the use efficiency of the cable is improved by arranging the semicircular supporting block 21 at the joint of the shielding layer 2 and the insulating layer; the insulation layer is divided into an inner insulation layer 11 and an outer insulation layer 12, the inner insulation layer 11 is in clearance fit with the outer insulation layer 12, the outer insulation layer 12 is in sliding connection with the shielding layer 2, the elastic block 111 is arranged between the inner insulation layer 11 and the outer insulation layer 12, the elastic block 111 is made of insulating elastic rubber, current in the wire core 1 cannot contact with the outer insulation layer 12, the insulation layer has an insulation effect, the inner insulation layer 11 is connected with the outer insulation layer 12 through the elastic block 111, the insulation layer has a shock absorption effect to a certain extent, and therefore the service efficiency and the service life of the cable are improved to a certain extent; through at inside insulating layer and the shielding layer 2 that sets up of cable, the insulating layer is used for making the electric current in the inside sinle silk 1 of insulating layer can not contact with the structure outside the insulating layer, through setting up shielding layer 2, shielding layer 2 is used for the shielding cable external current, make the electric current in cable external current and sinle silk 1 can not contact, through set up arc piece 112 in the insulating layer, arc piece 112 one end links firmly with external insulation layer 12, thereby improve the availability factor of cable, on the other hand, when sinle silk 1 rocks, sinle silk 1 contacts arc piece 112, arc piece 112 is insulating material, sinle silk 1 contact to insulating layer exterior structure has been avoided, thereby the electric current in having avoided sinle silk 1 produces the influence to insulating layer external environment, thereby the availability factor of cable has been increased.
In order to obtain the cable, the outer part of the existing cable core is firstly wrapped with a polyvinyl chloride insulating layer, then four elastic blocks are uniformly and fixedly connected with the outer ring of the inner insulating layer, the other end of each elastic block is wrapped with a polyvinyl chloride insulating layer for the second time, then an arc-shaped block is fixedly connected with the inner wall of the outer insulating layer, then a shielding layer is wrapped on the outer wall of the outer insulating layer, a high-elasticity copper sheet is wrapped in the shielding layer, then a protective layer is wrapped on the outer wall of the shielding layer, when a polyvinyl chloride groove material used by the protective layer is produced in a mould, an iron net layer is placed on the outer part, and then the produced protective layer is wrapped on the outer side of the shielding layer.
Compared with the prior art, the shielding net is arranged in the prior art, the high-elasticity copper sheet is used on the outer side of the shielding net, the hollow latticed structure adopted by the invention reduces the cost to a certain extent, and the insulating layer is arranged in the hollow manner compared with the prior art, so that the production materials are reduced, and the production cost of the invention is not increased or even reduced.
The polyvinyl chloride cable produced by the invention uses polyvinyl chloride as a material, has the effects of shock resistance, compression resistance, fire resistance, water resistance and insulation when in use, has the function of torsion resistance when the cable is twisted through the arrangement of an internal structure, and is superior to the prior art when being used in a specific environment limited by the invention.
The front, the back, the left, the right, the upper and the lower are all based on the figure 2 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of protection of the present invention.
Claims (4)
1. A preparation method of a polyvinyl chloride insulated power cable is characterized by comprising the following steps: the method comprises the following steps:
s1: at normal temperature, a wire drawing machine is utilized to pass through one or more die holes of a drawing die to reduce the cross section, increase the length and improve the strength of a copper rod and an aluminum rod, after heating is completed, a conductive wire core (1) is obtained, and then the conductive wire core (1) is formed by stranding a plurality of monofilaments to obtain a cable inner wire core (1);
s2: extruding an insulating layer from the outer ring of the wire core (1) obtained in the S1 in a wrapping mode, wherein the insulating layer is made of polyvinyl chloride, wrapping the insulating layer outside the wire core (1) by using the extruded insulating material in a wrapping mode, and twisting the insulating layer into a round shape by using a wrapping machine;
s3: the shielding layer (2) is wrapped on the outer ring of the insulating layer, the protective layer (3) is wrapped on the outer ring of the shielding layer (2), the protective layer (3) is made of polyvinyl chloride materials, and a protective net (32) is arranged in the protective layer (3) to protect the cable in all directions;
the cable manufactured in the S3 comprises a wire core (1), an insulating layer, a shielding layer (2) and a protective layer (3), wherein the insulating layer wraps the outer surface of the wire core (1) and is fixedly connected with the outer surface of the wire core (1), the shielding layer (2) wraps the outer surface of the insulating layer, the shielding layer (2) is connected with the outer surface of the insulating layer in a sliding mode, and a high-elasticity copper sheet wraps the inside of the shielding layer (2); the protective layer (3) wraps the outer surface of the shielding layer (2), the protective layer (3) is in sliding connection with the outer surface of the shielding layer (2), a latticed protective net (32) is fixedly connected inside the protective layer (3), and the protective net (32) is located on one side, far away from the shielding layer (2), inside the protective layer (3);
the protection net (32) is formed by connecting a plurality of blocks with X sections, and one end of the protection net (32) far away from the annular block (31) is made of magnesium oxide material; the shielding layer (2) is in a ring wave shape, and an arch-shaped cavity is formed between adjacent contact points of the shielding layer (2) and the protective layer (3); and the contact point of the shielding layer (2) and the insulating layer is an arched cavity.
2. The method for preparing a polyvinyl chloride insulated power cable according to claim 1, wherein the method comprises the following steps: the shielding material in the shielding layer (2) is a high-elasticity copper sheet, and the high-elasticity copper sheet is wrapped inside the shielding layer (2).
3. The method for preparing a polyvinyl chloride insulated power cable according to claim 2, wherein the method comprises the following steps: the insulating layer comprises inner insulating layer (11) and outer insulating layer (12), inner insulating layer (11) links firmly with sinle silk (1), outer insulating layer (12) and shielding layer (2) sliding connection, clearance fit between inner insulating layer (11) and outer insulating layer (12), be provided with elasticity piece (111) in the insulating layer, elasticity piece (111) one end links firmly with inner insulating layer (11), and the other end links firmly with outer insulating layer (12), and elasticity piece (111) have insulating elastic rubber to constitute.
4. The method for preparing a polyvinyl chloride insulated power cable according to claim 3, wherein the method comprises the following steps: evenly be provided with arc piece (112) between inner insulating layer (11) and outer insulating layer (12), the arc limit of arc piece (112) becomes concentric circles form with sinle silk (1), and arc piece (112) one end links firmly with outer insulating layer (12), other end and inner insulating layer (11) clearance fit, and arc piece (112) comprise insulating elastic rubber.
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| CN111613363A (en) * | 2020-04-24 | 2020-09-01 | 周民主 | High-elasticity composite cable |
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| CN106098156A (en) * | 2016-05-31 | 2016-11-09 | 浙江汇力胶囊有限公司 | A kind of polyvinyl chloride insulation shielded flexible cable and preparation method |
| CN206532619U (en) * | 2017-03-15 | 2017-09-29 | 深圳讯道实业股份有限公司 | A kind of unmanned plane charges with shielding anti-torsion cable in the air |
| CN208335792U (en) * | 2018-07-20 | 2019-01-04 | 安徽纵横新能源有限责任公司 | Crushing resistance electric wire |
| KR102207956B1 (en) * | 2019-05-10 | 2021-01-26 | 블루메탈(주) | Manufacturing method of audio cable having magnetic high shield and high insulating property, and audio cable manufactured by the same |
| CN110246610A (en) * | 2019-06-24 | 2019-09-17 | 山东天厚新材料科技有限公司 | A kind of high temperature resistant electromagnetic shielding copper wire |
| CN210467362U (en) * | 2019-08-14 | 2020-05-05 | 上海玖开电线电缆有限公司 | Bending-torsion-resistant cable for robot body |
| CN212874101U (en) * | 2020-08-21 | 2021-04-02 | 扬州海虹电缆有限公司 | Extrusion type sheath polyvinyl chloride electric wire |
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