CN111210945A - Processing technology for color separation of ultraviolet radiation crosslinked cable and radiation focusing device - Google Patents
Processing technology for color separation of ultraviolet radiation crosslinked cable and radiation focusing device Download PDFInfo
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- CN111210945A CN111210945A CN201911225184.0A CN201911225184A CN111210945A CN 111210945 A CN111210945 A CN 111210945A CN 201911225184 A CN201911225184 A CN 201911225184A CN 111210945 A CN111210945 A CN 111210945A
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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
- H01B13/003—Apparatus or processes specially adapted for manufacturing conductors or cables using irradiation
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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
- H01B13/0036—Details
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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
- H01B13/14—Insulating conductors or cables by extrusion
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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
- H01B13/34—Apparatus or processes specially adapted for manufacturing conductors or cables for marking conductors or cables
- H01B13/342—Apparatus or processes specially adapted for manufacturing conductors or cables for marking conductors or cables by applying marked tape, thread or wire on the full length of the conductor or cable
Abstract
The invention relates to the embodiment of the invention and discloses a processing technology of ultraviolet radiation crosslinking cable color separation and a radiation focusing device, comprising the following steps: step S1, preprocessing the ribbon and the cable conductor; step S2, bonding the ribbon and the cable conductor to form a primary combination body of an integrated structure; and step S3, extruding the insulation of the ribbon and the cable conductor through an extruder, crosslinking through ultraviolet radiation, and cooling and forming. The invention carries out color separation by adding the color band, overcomes the influence of color separation of the color master batch on the physical property and the electrical property of the insulating material in the prior art, and has the advantages of material cost reduction, high production speed, stable quality, online flow type crosslinking and the like by utilizing the ultraviolet crosslinking technology.
Description
Technical Field
The invention relates to the field of cables, in particular to an ultraviolet radiation cross-linked cable color separation processing technology and a radiation focusing device.
Background
In the relevant specifications of the electrical industry in China, clear text is provided, and the color of the cable needs to be identified according to relevant requirements so as to facilitate installation and later maintenance. In the prior art, the power cable for power transmission and distribution generally has high transmission power and high voltage, so that the requirement on reliability is high, the insulating layer of the cable is relatively thick, and the requirement on electrical performance is relatively high. Because the insulated wire core of the power cable can meet the requirements of processing and installation, different colors are generally adopted for distinguishing.
At present, different specifications of products are produced in small batches, so different colors need to be changed when insulation is opened, the material waste is large due to frequent color changing, the material discharging of a machine body is unclear, the color mixing of the insulating surface can be caused to form unqualified products, particularly, after coloring master batches are added, the mechanical and physical properties and the electrical properties of an insulating material can be reduced, such as the reduction of insulation resistance, the increase of capacitance coefficient and the like, and once overvoltage occurs to a power supply line, the defects that a switch frequently trips and the like often occur due to overcurrent.
The crosslinking method of the high polymer insulating layer or the protective layer of the wire and the cable at present mainly comprises a chemical method, a high-energy electron beam radiation method, a silane method and an ultraviolet crosslinking method. The chemical method and the high-energy electron beam radiation method have the defects of complex equipment, high manufacturing cost, large one-time investment and the like; the silane method has the defects of high cost, long crosslinking time, complex process operation, low temperature resistance grade of products and the like because imported raw materials are required. Compared with the first three methods, the ultraviolet crosslinking method has the advantages of simple equipment, high efficiency, low investment, easy operation and implementation, low product cost and good quality. In the experimental production process of ultraviolet crosslinking equipment for producing electric wires and cables (patent No. 91208158.9), the problems of the utilization rate of light energy, the uniformity of illumination, temperature control, uniformity and the like are found. For example, the light emitted by the light source cannot be well focused on the cable to be crosslinked, and particularly, a large part of the light emitted toward the cable is scattered and cannot be fully utilized; although a uniform distribution configuration of the light sources over a 360 ° spatial circumference is adopted, in the case of a limited number of light sources, the light received in the direction of the light source gap, particularly the portion facing away from the light source, is still not uniform enough for thicker power cables; in addition, the use temperature is very high, which causes the temperature in the illumination area to be uneven, which not only affects the thermal aging stability of the crosslinked cable, but also seriously affects the service life of the lamp tube and the reflecting cover, which in turn limits the power of the used ultraviolet lamp tube not to be too high.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a color separation processing technology of an ultraviolet radiation cross-linked cable and a radiation focusing device, which realize insulation color separation by adding a color band, overcome the influence on the physical property and the electrical property of an insulation material after a color master batch is mixed in a cross-linked cable material in the prior art, and solve the problems in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the ultraviolet radiation crosslinked cable color separation processing technology comprises the following specific steps:
s1, preprocessing the ribbon and the cable conductor, and fixing the ribbon to the front of a machine head of the extruding machine;
s2, attaching a ribbon with a required color and a cable conductor to form a primary united body of an integrated structure;
s3, extruding the material by the extruder head, crosslinking by ultraviolet radiation, cooling and shaping.
Further, step S1 includes the following steps:
s11, adjusting the position of the ribbon, correcting the ribbon releasing angle and distance, and ensuring that the ribbon is smoothly pasted outside the conductor and enters the head of the extruder at a constant speed;
s12, adjusting the traction speed of the motor, performing trial discharging on the basis of color ribbon adjustment, adjusting the thickness and eccentricity of the color ribbon while discharging, and improving the uniformity of color ribbon application.
Further, preheating the extruder is included before step S2, which includes the following steps: the power supply is turned on to heat the zones of the extruder to the specified temperatures and each specified temperature is maintained for more than 30 minutes.
Preferably, in step S2, the screw rotation speed of the extruder and the pulling speed of the motor are adjusted so that the ribbon and the cable conductor enter the extruder at a synchronous speed, and the ribbon is coated on the surface of the cable conductor by high temperature to form a primary combination with an integrated structure.
Further, in step S3, the specific steps of uv radiation crosslinking are:
step S31, adding a photocrosslinking sensitizer into the insulating resin, extruding an insulating layer from the primary combination after extruding the ribbon, and transmitting the insulating layer and the cable conductor by ultraviolet radiation focus when extruding the insulating layer;
and step S32, entering a water tank for cooling and shaping.
In addition, the invention also provides a radiation focusing device applied to the color separation processing technology of the ultraviolet radiation cross-linked cable, which comprises an annular fixed cover, wherein a wire passing channel is arranged on the inner ring of the annular fixed cover, a plurality of ultraviolet focusing devices which are radially arranged are uniformly distributed around the circumference between the annular fixed cover and the wire passing channel, each ultraviolet focusing device comprises a frame rod connected with the annular fixed cover, a plurality of buckles are sequentially arranged on the frame rod, and an ultraviolet emitter, a diffusion lens, a focusing lens, a calibration lens and a light homogenizing plate are respectively and fixedly arranged on the buckles which are sequentially arranged from the radial outer side to the inner side.
Furthermore, the centers of the ultraviolet emitter, the diffusion lens, the focusing lens, the collimating lens and the light homogenizing plate are all located on the same straight line, and the relative positions of every two ultraviolet emitters are determined through the focal length.
Furthermore, the light equalizing plates positioned on different ultraviolet focusing devices are all arc-surface-shaped, a plurality of light equalizing plates are sequentially connected to form a light equalizing cover, and two ends of the collimating lens are flush with the light equalizing plates.
Furthermore, diffuse reflection compensation mirrors are arranged at the joints of the two ends of the focusing lens and the buckles.
Has the advantages that: the invention relates to a color separation processing technology and a radiation focusing device for an ultraviolet radiation cross-linked cable, which have the following advantages: (1) the color bands with various colors are added, the ultraviolet radiation crosslinking mode is utilized for production, the requirement of insulation color separation of the ultraviolet radiation crosslinking cable is met, the influence of color master batches mixed in insulation materials on the physical performance and the electrical performance of the insulation materials in the prior art is overcome, the ultraviolet radiation crosslinking technology has the advantages of high production speed, stable quality, online flow type crosslinking and the like, the same set of equipment can adapt to lead cables with different colors, different wire diameters and different insulation thicknesses, in addition, frequent material changing and material discharging due to different color requirements are not needed in the whole production process, the raw material cost and the working hour cost are greatly reduced, the production speed of the process is controllable, the production is carried out within an allowed speed range, the requirement of different insulation colors is met, and the uniformity and the consistency of ultraviolet radiation crosslinking cable products are also improved. Compared with the conventional extrusion process, the process has inheritance, can realize production operation only by controlling the replacement of the color ribbon, the ribbon releasing angle and the ultraviolet crosslinking process, and has the advantages of easy control, safe and reliable production; (2) in the invention, by optimizing the ultraviolet focusing device, a balanced ultraviolet pipeline can be generated, the illumination is uniform enough, the cross-linking degree in different directions is equivalent, and the production quality of the lead is better.
Drawings
FIG. 1 is a schematic process flow diagram according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an ultraviolet radiation focusing assembly in accordance with an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an ultraviolet focusing device according to an embodiment of the present invention.
In the figure: 1. an annular fixed cover; 2. a wire passage; 3. an ultraviolet focusing device; 4. a frame bar; 5. buckling; 6. an ultraviolet emitter; 7. a diffusion lens; 8. a focusing lens; 9. a collimating lens; 10. a light homogenizing plate; 11. and a diffuse reflection compensation mirror.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
As shown in FIG. 1, the embodiment of the invention relates to an ultraviolet radiation crosslinking cable insulation color separation processing technology, which comprises the following steps:
step S1, pre-processing of ribbon and cable conductors.
The ribbon is stored in reels in industrial production, and is put on a pay-off device and enters an extruder together with a conductor during production so as to form an integral body with the conductor. However, since the ribbon melts and bonds with the conductor during the extrusion process, the extrusion process needs to be pretreated to ensure uniformity of the whole extrusion process.
In step S1, the preprocessing includes the steps of:
step S11, selecting different color bands and fixing the color bands in front of the head of the extruding machine;
step S12, adjusting the position of the ribbon, correcting the ribbon releasing angle and distance, and ensuring that the ribbon is smoothly pasted outside the conductor and enters the head of the extruder at a constant speed;
and step S13, adjusting the traction speed of the motor, performing trial discharging on the basis of color tape adjustment, adjusting the thickness and eccentricity of the color tape while discharging, and improving the uniformity of color tape application.
The ribbon is enabled to be paid out and matched with the paying-off line of the conductor through debugging, so that the extrusion uniformity precondition is provided, and the relative position of the ribbon and the conductor and the angle and the distance of the ribbon entering the machine head need to be adjusted.
In the embodiment, the relative position of the colored tape and the conductor and the angle and the distance of the colored tape entering the machine head are adjusted, so that the same equipment can adapt to lead cables with different colors, different wire diameters and different insulation thicknesses, and the adjustment of the selection and the squeezing state of the coiled finished colored tape can be realized in the actual production process.
In addition, in order to ensure the uniformity of the thickness of the ribbon applied to the surface of the conductor in the extrusion process, the extruded parameters are tested and adjusted through trial discharge materials during extrusion so as to meet different actual requirements, and meanwhile, the effect of ribbon application can be intuitively recognized through a pre-test mode, so that the process is adaptively adjusted, and the application effect is improved as much as possible.
Step S2, form the primary united body of the integrated structure by adding the ribbon of the required color and cable conductor.
The method is characterized in that a primary combination body is formed by a color band and a cable conductor through the extrusion process of a machine head, so that subsequent ultraviolet radiation crosslinking color separation is facilitated, the step is the basis of the subsequent ultraviolet radiation crosslinking color separation, the traction speed needs to be adjusted in the process, the color band and the cable conductor have matched speeds, and meanwhile, in order to avoid different extrusion results from head to tail, the extruder needs to be preheated and pre-adjusted.
Preheating of the extruder is also included prior to step S2, and includes the following steps: the power supply is turned on to heat the zones of the extruder to the specified temperatures and each specified temperature is maintained for more than 30 minutes. Since the temperatures of the respective zones have different specified values and the time required for the temperatures to reach the specified temperatures is different, the maximum time is required as the calibration time in order to ensure that the temperatures of the respective zones are the same, and in the present embodiment, a time of 30 minutes or more is sufficient for the temperatures of the respective zones to reach the specified values.
In step S2, the motor is controlled to move the ribbon and the cable conductor into the extruder at a synchronous speed, the ribbon is applied to the surface of the cable conductor by the head to form a primary united body with an integrated structure, and then the primary united body is extruded with the uv radiation crosslinking insulation material and is subjected to the crosslinking production by the uv radiation.
In this embodiment, it is noted that the primary combination is formed and fed directly into the extruder.
And step S3, extruding the materials by an extruder, crosslinking by ultraviolet radiation, cooling and forming.
In step S3, the ultraviolet radiation crosslinking color separation specifically includes:
step S31, extruding an insulating layer for the primary combination after the ribbon is added, and transmitting the insulating layer by ultraviolet radiation focusing by using a photo-crosslinking sensitizer in the insulating resin;
and step S32, entering a water tank for cooling and shaping.
When the cable is manufactured, ultraviolet irradiation crosslinking is adopted because the crosslinking material is formed under the interaction of high temperature and ultraviolet irradiation of plastic extrusion molding. A proper amount of photo-crosslinking sensitizer is added into the base resin, ultraviolet radiation is focused and transmitted into the polyolefin material by utilizing the characteristic that the polyolefin material is in a transparent state during heating and extrusion, the high-energy ultraviolet light is used for inducing the photo-crosslinking sensitizer to form free radicals and further inducing polyolefin units to generate macromolecular free radicals, and the free radicals form a crosslinking material through bonding, so that the crosslinking effect is achieved.
In the ultraviolet radiation crosslinking process, the whole production process is simplified, in the crosslinking process, the color separation can be realized only by feeding the color band and the conductor of the required color into the extruder head together, and then the crosslinking products of various colors can be realized through uniform ultraviolet irradiation.
Therefore, in the present invention, it is emphasized that a high degree of uniformity of the ultraviolet irradiation is required in order to achieve an optimum crosslinking effect. In addition, in the prior art, color separation is not always realized by only doping color concentrates into insulating materials, and the production mode of the color separation greatly wastes raw materials and labor hours, and the uniformity and stability of a crosslinked product are reduced by the doping of the color concentrates.
In the invention, the color band plays an important role in color separation of the ultraviolet radiation crosslinked cable, and the influence factors of color master batch in the prior art on the crosslinking uniformity and consistency of the product are eliminated. In order to further optimize the effect, as shown in fig. 2 and fig. 3, the invention further provides an ultraviolet radiation focusing device, which comprises an annular fixed cover 1, wherein a wire passing channel 2 is arranged on the inner ring of the annular fixed cover 1, and a plurality of ultraviolet focusing devices 3 which are uniformly distributed are arranged between the annular fixed cover 1 and the wire passing channel 2.
The wire passing channel 2 is a primary combination body for transmission and formation, and generates ultraviolet rays with uniform intensity radiation through the action of the ultraviolet focusing device 3, in order to achieve the effect, in the embodiment, the ultraviolet focusing device 3 comprises a frame rod 4 connected with the annular fixed cover 1, a plurality of buckles 5 are sequentially arranged on the frame rod 4, an ultraviolet emitter 6, a diffusion lens 7, a focusing lens 8, a collimating lens 9 and a light-equalizing plate 10 are respectively and fixedly installed on the buckles 5 sequentially arranged from outside to inside, wherein the centers of the ultraviolet emitter 6, the diffusion lens 7, the focusing lens 8, the collimating lens 9 and the light-equalizing plate 10 are all located on the same straight line, and the relative positions between every two are determined through focal lengths.
In the present embodiment, the action of each lens is first clarified:
diffusion lens 7: diffusing the point-like light rays emitted from the ultraviolet ray emitter 6 into a ray shape so as to form parallel light rays through the focusing lens 8;
focusing lens 8: the ray-shaped light rays form parallel light rays through a reverse focusing effect;
the collimating lens 9: the lens has the effect that the formed parallel light can be adapted to the light equalizing plate 10 in the cambered surface through the fine adjustment effect, the formation of non-parallel light with a large difference is avoided, and because the lens is very close to the primary combination body, the generated error is very small after calibration and is within an allowable range.
In addition, the light equalizing plates 10 positioned on different ultraviolet focusing devices 3 are all arc-surface-shaped, a plurality of light equalizing plates 10 are sequentially connected to form a light equalizing cover, and two ends of the collimating lens 9 are flush with the light equalizing plates 10.
In order to better realize the parallelism of ultraviolet rays and avoid the influence of edge light on the ultraviolet rays, diffuse reflection compensation mirrors 11 are arranged at the joints of the two ends of the focusing lens 8 and the buckles 5, and the diffuse reflection compensation mirrors 11 are used for reflecting light overflowing from the edges back to comprehensively compensate in light paths in different directions through diffuse reflection, so that the purpose of balanced compensation is achieved.
By integrating the preparation process disclosed by the invention, the ultraviolet crosslinking technology has the advantages of high production speed, stable quality, online flow type crosslinking and the like, the same set of equipment can adapt to lead cables with different color requirements, different wire diameters and different insulation thicknesses, the production speed of the whole process is controllable, the production is carried out within an allowable speed range, and the quality requirement of the crosslinking degree is ensured. Compared with the conventional extrusion process, the cross-linking process has inheritance, can realize the operation of the process only by additionally controlling the ribbon changing and releasing angle and the ultraviolet cross-linking of the ribbon, and has the advantages of easy control, safe and reliable production.
Moreover, by optimizing the UV focusing device 3 in the present invention, it is possible to produce a balanced UV line, so that the degree of cross-linking in different directions is comparable, and better for the production quality of the wire.
Claims (9)
1. A color separation processing technology of an ultraviolet radiation crosslinked cable is characterized by comprising the following specific steps:
s1, preprocessing the ribbon and the cable conductor, and fixing the ribbon to the front of a machine head of the extruding machine;
s2, attaching a ribbon with a required color and a cable conductor to form a primary united body of an integrated structure;
s3, extruding the material by the extruder head, crosslinking by ultraviolet radiation, cooling and shaping.
2. The ultraviolet radiation crosslinked cable color separation process of claim 1, wherein: the step S1 further includes the steps of:
s11, adjusting the position of the ribbon, correcting the ribbon releasing angle and distance, and ensuring that the ribbon is smoothly pasted outside the conductor and enters the head of the extruder at a constant speed;
s12, adjusting the traction speed of the motor, performing trial discharging on the basis of color ribbon adjustment, adjusting the thickness and eccentricity of the color ribbon while discharging, and improving the uniformity of color ribbon application.
3. The ultraviolet radiation crosslinked cable color separation process of claim 1, wherein: preheating of the extruder is also included prior to step S2, and includes the following steps: the power supply is turned on to heat the zones of the extruder to the specified temperatures and each specified temperature is maintained for more than 30 minutes.
4. The ultraviolet radiation crosslinked cable color separation process of claim 1, wherein: in step S2, the screw rotation speed of the extruder and the pulling speed of the motor are adjusted so that the ribbon and the cable conductor enter the extruder at a synchronous speed, and the ribbon is coated on the surface of the cable conductor by high temperature to form a primary combination body with an integrated structure.
5. The ultraviolet radiation crosslinked cable color separation process of claim 1, wherein: in step S3, the specific steps of uv radiation crosslinking are:
step S31, adding a photocrosslinking sensitizer into the insulating resin, extruding an insulating layer from the primary combination after extruding the ribbon, and transmitting the insulating layer and the cable conductor by ultraviolet radiation focus when extruding the insulating layer;
and step S32, entering a water tank for cooling and shaping.
6. A radiation focusing device applied to the color separation processing technology of the ultraviolet radiation crosslinking cable of claim 5, is characterized in that: including annular fixed cover (1), annular fixed cover (1) inner circle is equipped with wire passing channel (2) between annular fixed cover (1) and wire passing channel (2) round circumference evenly distributed have a plurality of ultraviolet focusing device (3) of radial setting, ultraviolet focusing device (3) include hack lever (4) of being connected with annular fixed cover (1), a plurality of buckle (5) have set gradually on hack lever (4), by radial outside to interior buckle (5) that set gradually on respectively fixed mounting have ultraviolet emitter (6), diffusion lens (7), focusing lens (8), calibration lens (9) and board (10) of evening light.
7. The radiation focusing device for the color separation processing technology of ultraviolet radiation crosslinked cable according to claim 6, characterized in that: the centers of the ultraviolet emitter (6), the diffusion lens (7), the focusing lens (8), the calibration lens (9) and the light-equalizing plate (10) are all located on the same straight line, and the relative positions of every two are determined through the focal length.
8. The radiation focusing device for the color separation processing technology of ultraviolet radiation crosslinked cable according to claim 6, characterized in that: the light equalizing plates (10) positioned on the different ultraviolet focusing devices (3) are arc-surface-shaped, the light equalizing plates (10) are sequentially connected to form a light equalizing cover, and two ends of the collimating lens (9) are flush with the light equalizing plates (10).
9. The radiation focusing device for the color separation processing technology of ultraviolet radiation crosslinked cable according to claim 6, characterized in that: and diffuse reflection compensation mirrors (11) are arranged at the joints of the two ends of the focusing lens (8) and the buckles (5).
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| CN111210945B (en) | 2021-11-23 |
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