CN110690009A

CN110690009A - Weather-proof insulated power cable

Info

Publication number: CN110690009A
Application number: CN201910983622.3A
Authority: CN
Inventors: 赵玉所; 余宗仁
Original assignee: ANHUI RAINBOW ARE CABLE GROUP Co Ltd
Current assignee: ANHUI RAINBOW ARE CABLE GROUP Co Ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-01-14
Anticipated expiration: 2039-10-16
Also published as: CN110690009B

Abstract

The invention discloses a weather-proof insulated power cable which comprises production steps of stay wires, stranded wires, cabling, armoring, extrusion molding and the like, and is simple in principle and reasonable in design, and the quality of the cable is improved by improving a wire drawing device and extrusion molding equipment.

Description

Weather-proof insulated power cable

Technical Field

The invention relates to the technical field of cable processing production, in particular to a weather-resistant insulated power cable.

Background

Electrical cables are typically rope-like cables made up of several or groups of conductors stranded together and often characterized by an inner, electrically conductive, outer insulation.

Cable production often needs to pass through a plurality of processes, wherein, the wire drawing is direct to be concerned with the processingquality of cable conductor sinle silk, and the extrusion molding is then direct to be concerned with the cladding insulating effect of conductor sinle silk.

The existing wire drawing equipment and extrusion molding equipment used at present often have certain defects, firstly, for the wire drawing equipment, the problems of poor guiding performance and poor applicability often exist, the normal operation and wire drawing precision of wire drawing of inner conductor raw materials are seriously influenced, and only certain inner conductor raw materials of a single specification can be drawn, for the extrusion molding equipment, a conventional extruder does not have the function of crushing cable materials, the problem of insufficient melting of large-particle cable materials is often caused in the melting process, solid particles are easily mixed, the extrusion molding effect is seriously influenced, and the necessary preheating function is lacked, so that the improvement of the extrusion molding efficiency is not facilitated; the above problems all have a decisive influence on the quality performance of the cable.

Disclosure of Invention

The invention aims at the problems and discloses a weather-proof insulated power cable.

The specific technical scheme is as follows:

a weather-resistant insulated power cable is characterized in that the production steps comprise stay wires, stranded wires, cabling, armoring and extrusion molding, and the production steps comprise the following specific contents:

(1) and (3) wire pulling: sending the inner conductor raw material cable to a wire drawing device for wire drawing, and drawing a conductor wire rod with a specified specification;

(2) stranding: stranding the conductor wire obtained in the step (1) by adopting a non-back-twist stranding method, wherein when the conductor wire is stranded, the outer conductor wire is wound in a right direction (Z shape), the inner conductor wire is wound in a left direction (S shape), and after a conductor wire core is formed by stranding, the conductor wire is compressed;

(3) cabling: after stranding is finished, obtaining a conductor core, conveying the conductor core to a cabling machine for cabling, unifying the cabling direction to be the right direction, controlling the pitch, and wrapping by adopting a wrapping tape, and performing quality inspection after cabling is finished, wherein the surface is required to be clean and not damaged;

(4) sheathing: after cabling is finished, the conductor wire core is pulled to a cable armoring machine for armoring, two layers of steel belts are wound at intervals when armoring is carried out, and the winding direction is the right direction;

(5) extrusion molding: after the armour was accomplished, the conductor sinle silk was pull and is passed through the extrusion molding aircraft nose, carries out the extrusion molding through extrusion molding equipment, accomplishes conductor sinle silk outer insulation layer extrusion molding, after through the cooling design, the rolling.

The weather-resistant insulated power cable comprises a pay-off roller and a take-up roller, wherein a first guide roller, a second guide roller, a first wire drawing mechanism, a first guide assembly, a second wire drawing mechanism, a third guide roller, a fourth guide roller, a movable guide assembly, a fourth wire drawing mechanism, a fifth guide roller, a first wire drawing die, a sixth guide roller, a movable guide roller assembly, a seventh guide roller, a second wire drawing die, a second guide assembly and an eighth guide roller are sequentially arranged between the pay-off roller and the take-up roller;

the first guide roller and the second guide roller are vertically distributed, the primary wire drawing mechanism comprises a first rotating panel, a primary wire drawing roller and a pawl, the first rotating panel is circular, the middle of the first rotating panel is connected with a motor and is controlled to rotate by the motor, a circle of ratchets are arranged on the periphery of the circle of the first rotating panel, the ratchets are correspondingly matched with the pawl, the number of the pawl is multiple, the pawl is uniformly distributed on the periphery of the first rotating panel, the rear end of the pawl is connected with a first air cylinder, the pawl is stretched by the first air cylinder, and the first rotating panel is locked;

the number of the primary wire drawing rollers is multiple, the multiple primary wire drawing rollers are rotatably arranged on the first rotating panel and can freely rotate in a fixed shaft mode, the multiple primary wire drawing rollers are uniformly distributed, and wire paths are different;

the first guide assembly and the second guide assembly are identical in structure and are respectively composed of roller seats which are oppositely arranged up and down, the roller seats are fixedly arranged, and a plurality of freely-rotating shaft rollers are uniformly arranged on the roller seats;

the secondary wire drawing mechanism comprises a fan-shaped panel and a secondary wire drawing roller, the secondary wire drawing roller comprises a positioning wire drawing roller and a movable wire drawing roller, the fan-shaped panel is fixedly arranged, an arc-shaped slideway and a symmetrical second air cylinder are arranged on the fan-shaped panel, the fixed point of the positioning wire drawing roller is arranged on the fan-shaped panel, the movable wire drawing roller is arranged at the arc-shaped slideway in a sliding manner, is connected with the second air cylinder, is controlled by the second air cylinder and slides along the arc-shaped guide formed by the arc-shaped slideway;

the third-time wire drawing mechanism comprises a second rotating panel and a third-time wire drawing roller, the third-time wire drawing roller comprises 2 positioning wire drawing rollers, the second rotating panel is circular, the middle part of the second rotating panel is connected with a motor, the rotation of the second rotating panel is controlled by the motor, and the 2 positioning wire drawing rollers forming the third-time wire drawing roller are symmetrically arranged on the second rotating panel and rotate along with the second rotating panel;

the third guide roller and the fourth guide roller are arranged between the third-time wire drawing mechanism and the movable guide assembly and are arranged in a vertically staggered manner, the movable guide assembly is composed of roller seats which are arranged oppositely up and down, the upper roller seat and the lower roller seat can be divided according to the upper position and the lower position of the roller seats, the lower roller seat is fixedly arranged, and the upper roller seat is connected with a third air cylinder and is controlled by the third air cylinder to lift;

quartic wire drawing mechanism is unanimous with secondary wire drawing mechanism structure, activity guide roll subassembly includes bar panel, activity deflector roll and fourth cylinder, the bar panel is the slant setting, is equipped with sharp slide on it, the fourth cylinder is fixed to be set up in bar panel one end, the activity deflector roll slides and sets up in sharp slide department to link to each other with the fourth cylinder, the activity deflector roll is controlled by the fourth cylinder, slides along sharp slide direction.

The working method of the wire drawing device is as follows:

(a1) paying off the inner conductor raw material cable by a paying-off roller, and firstly, winding around a first guide roller and a second guide roller to stretch the inner conductor raw material cable in a folding line;

(a2) Then, the inner conductor raw material cable bypasses a primary wire drawing roller on a primary wire drawing mechanism to perform primary wire drawing, and the primary wire drawing roller is switched in a rotating mode through a first rotating panel, so that wire paths with corresponding specifications are switched, and the wire drawing specifications are adjusted;

(a3) After being guided by the first guide assembly, the inner conductor raw material cable subjected to the first wire drawing enters the secondary wire drawing mechanism, is wound in an 8-shaped manner between a positioning wire drawing roller and a movable wire drawing roller which form the secondary wire drawing roller, and is subjected to the second wire drawing;

(a4) The inner conductor raw material cable which finishes the second wire drawing enters a third wire drawing mechanism, the inner conductor raw material cable is wound in a shape like a letter 8 between 2 positioning wire drawing rollers which form a third wire drawing roller, and the third wire drawing is carried out;

(a5) After the inner conductor raw material cable subjected to the third-time wire drawing is guided by the third guide roller and the fourth guide roller, the inner conductor raw material cable enters the movable guide assembly, and an upper roller seat of the movable guide assembly can be lifted by the third air cylinder, so that the tension of the inner conductor raw material cable can be adjusted;

(a6) Feeding the raw material cable of the inner conductor of the movable guide assembly into a fourth-time wire drawing mechanism, and performing fourth-time wire drawing in the same step (a 3);

(a7) The inner conductor raw material cable subjected to fourth-time wire drawing sequentially passes through a fifth guide roller, a first wire drawing die, a sixth guide roller, a movable guide roller assembly, a seventh guide roller, a second wire drawing die, a second guide assembly and an eighth guide roller, is guided by the fifth guide roller, is subjected to fifth wire drawing by the first wire drawing die, is then guided by the combination of the sixth guide roller, the movable guide roller assembly and the seventh guide roller, is subjected to second wire drawing die, is subjected to sixth wire drawing, and is finally taken up by a take-up roller after being guided by the second guide assembly and the eighth guide roller;

in the weather-resistant insulated power cable, in the step (a3), the second cylinder can control the movable wire drawing roller to slide along the arc-shaped slideway, so that the position of the movable wire drawing roller is adjusted, and the tension and the wire drawing strength of the inner conductor raw material cable at the wire outlet end of the secondary wire drawing mechanism are adjusted.

In the weather-resistant insulated power cable, in the step (a4), the third-time wire drawing roller rotates through the second rotating panel, so that the wire inlet angle of the wire inlet end and the wire outlet angle of the wire outlet end of the third-time wire drawing mechanism are adjusted, and the tension and the wire drawing strength of the inner conductor raw material cable are adjusted.

The weather-resistant insulated power cable comprises an extrusion molding machine head, wherein one side of the extrusion molding machine head is provided with a plurality of extrusion molding plasticizing mechanisms for supplying molten cable materials, the number of the extrusion molding plasticizing mechanisms is at least 2, and the upper end of each extrusion molding plasticizing mechanism is provided with a blanking mechanism for supplying the cable materials;

the blanking mechanism comprises a hopper, a rolling crushing assembly, a first feeding device and a second feeding device, the rolling crushing assembly is arranged under the hopper, the upper end of the rolling crushing component is communicated with the hopper, the lower end of the rolling crushing component is communicated with the upper end of the first feeding device, 2 rolling rollers which are extruded oppositely are arranged in the rolling crushing component, the 2 rolling rollers are horizontally and symmetrically arranged, the first feeding device is a feeding auger which is obliquely arranged, the upper end of the first feeding device is a feeding end, the lower end of the first feeding device is a discharging end, the upper end of the rolling crushing component is communicated with the rolling crushing component, the lower end of the rolling crushing component is communicated with a second feeding device which is a feeding auger, one end of the horizontal feeding device is communicated with the lower end of the first feeding device, and the other end of the horizontal feeding device is communicated with the plurality of extrusion plasticizing mechanisms through a first heat-insulating pipeline to convey cable materials to the extrusion plasticizing mechanisms;

wherein, the rotation directions of 2 rolling rollers are opposite;

the first feeding device is a feeding auger and comprises a first barrel and a first feeding shaft, the first feeding shaft is axially arranged along the first barrel and is driven by a motor, spiral feeding blades are arranged on the outer wall of the first feeding shaft, arc-shaped notches are uniformly formed in the feeding blades, and arc-shaped cutting edges are arranged at the arc-shaped notches;

the second feeding device is a feeding auger and comprises a second cylinder body, and a first heater for preheating the cable material is embedded in the second cylinder body;

the plastic extrusion plasticizing mechanism comprises a plastic extrusion barrel and a plastic extrusion screw, the plastic extrusion screw is arranged along the axial direction of the plastic extrusion barrel, one end of the plastic extrusion screw is connected with a plastic extrusion motor through a gear box, the plastic extrusion screw is driven by the plastic extrusion motor to rotate, the plastic extrusion barrel comprises a plastic extrusion inlet and a plastic extrusion outlet, the plastic extrusion inlet is communicated with a second feeding device through a first heat insulation pipeline, the plastic extrusion outlet is communicated with a plastic extrusion discharging main pipe through a second heat insulation pipeline, the plastic extrusion outlets of a plurality of plastic extrusion plasticizing mechanisms are converged at the position of the plastic extrusion discharging main pipe, the plastic extrusion discharging main pipe is a heat insulation pipe, and the plastic extrusion mechanism;

the extrusion molding screw is sequentially divided into a feeding section, a kneading section and a melting section along the axial direction, a pushing blade is arranged on the outer wall of the feeding section, the pushing blade is spiral, the kneading section is provided with a plurality of kneading rings, the plurality of kneading rings are sequentially arranged at equal intervals along the axis of the kneading section, the kneading rings protrude out of the outer surface of the kneading section and are frustum-shaped, and kneading grooves which are distributed in an umbrella shape are arranged on the outer surface of the frustum shape formed by the kneading rings;

wherein, the extrusion molding barrel is internally embedded with a plurality of heaters, which are respectively a second heater corresponding to the feeding section, a third heater corresponding to the kneading section and a fourth heater corresponding to the melting section;

wherein, the embedded constant temperature heater who is used for melting cable material heat preservation and adjusts the temperature that is equipped with of extrusion molding discharge header.

The weather-resistant insulated power cable comprises the following working methods of the extrusion molding equipment:

(b1) the cable material is fed to the extrusion molding plasticizing mechanism through a blanking mechanism, stored in a hopper and then falls into a rolling crushing assembly, rolling and crushing are carried out under the action of opposite extrusion and rolling of a rolling roller, the particle diameter of the cable material after rolling and crushing is reduced, the cable material enters a first feeding device, a first feeding shaft of the first feeding device rotates, the cable material is pushed through a feeding blade, meanwhile, the cable material is crushed again through an arc cutting edge at an arc notch, the cable material with low particle size enters a second feeding device after the feeding and crushing are completed, the cable material is preheated and softened under the action of a first heater, and finally, the cable material enters the extrusion molding plasticizing mechanism through a first heat insulation pipeline;

(b2) The cable material entering the extrusion plasticizing mechanism and preheated and softened gradually moves towards the extrusion molding machine head under the action of the extrusion molding screw; at the moment, the softened cable material firstly enters the material feeding section, is fed through the material feeding section, generates shear stress and is heated by the second heater, so that the temperature is quickly raised and the cable material is uniformly mixed; then the cable material enters a kneading section, is extruded and kneaded between a kneading ring and an extrusion molding cylinder, is rapidly heated and exhausted to accelerate melting and plasticizing, and finally enters a melting section, is extruded and rubbed between a screw groove and the extrusion molding cylinder in the melting section and is rapidly heated, so that the gas and the plasticizing are fully exhausted;

(b3) Treat cable material abundant melting, exhaust, behind the plastify, promptly for melting cable material, melting cable material passes through second heat preservation pipeline, gets into extrusion molding ejection of compact house steward to get into the extrusion molding aircraft nose through extrusion molding ejection of compact house steward, carry out the extrusion molding to the conductor sinle silk, the melting cable material that gets into second heat preservation pipeline keeps warm and adjusts the extrusion molding temperature through constant temperature heating ware in second heat preservation pipeline.

The invention has the beneficial effects that:

Drawings

FIG. 1 is a schematic view of the present invention.

Fig. 2 is a schematic drawing of a drawing apparatus.

Fig. 3 is a schematic view of a primary drawing mechanism.

Fig. 4 is a schematic view of a first guide assembly (as well as a schematic view of a second guide assembly).

Fig. 5 is a schematic view of a secondary wire drawing mechanism (the same four wire drawing mechanisms).

Fig. 6 is a schematic view of a triple wire drawing mechanism.

Fig. 7 is a schematic view of a movable guide assembly.

FIG. 8 is a schematic view of a movable guide roller assembly.

FIG. 9 is a schematic view of an extrusion apparatus.

Fig. 10 is a sectional view of the blanking mechanism.

Fig. 11 is a partial schematic view of a feeder blade.

FIG. 12 is a sectional view of an extrusion plasticizing mechanism.

FIG. 13 is a schematic view of a kneading ring.

Detailed Description

In order to make the technical solution of the present invention clearer and clearer, the present invention is further described below with reference to embodiments, and any solution obtained by substituting technical features of the technical solution of the present invention with equivalents and performing conventional reasoning falls within the scope of the present invention.

Example one

Example two

The wire drawing device comprises a pay-off roller 71 and a take-up roller 72, wherein a first guide roller 73, a second guide roller 74, a first wire drawing mechanism 75, a first guide assembly 76, a second wire drawing mechanism 77, a third wire drawing mechanism 78, a third guide roller 79, a fourth guide roller 710, a movable guide assembly 711, a fourth wire drawing mechanism 712, a fifth guide roller 713, a first wire drawing die 714, a sixth guide roller 715, a movable guide roller assembly 716, a seventh guide roller 717, a second wire drawing die 718, a second guide assembly 719 and an eighth guide roller 750 are sequentially arranged between the pay-off roller 71 and the take-up roller 72.

The first guide roller 73 and the second guide roller 74 are vertically distributed, the primary wire drawing mechanism 75 comprises a first rotating panel 720, a primary wire drawing roller 721 and pawls 722, the first rotating panel 720 is circular, the middle of the first rotating panel 720 is connected with a motor, the rotation of the first rotating panel 720 is controlled by the motor, a circle of ratchets are arranged on the circular periphery of the first rotating panel 720, the ratchets are correspondingly matched with the pawls 722, the pawls 722 are multiple in number and uniformly distributed on the periphery of the first rotating panel 720, the rear ends of the pawls 722 are connected with a first air cylinder 723 and extend and retract through the first air cylinder 723 to lock the first rotating panel 720;

the number of the primary drawing rollers 721 is plural, the plural primary drawing rollers 721 are rotatably disposed on the first rotary panel 720, and can freely rotate with fixed axes, and the plural primary drawing rollers 721 are uniformly distributed and have different yarn paths;

the primary wire drawing rollers can be switched as required to adjust the wire path specification, and the same inner conductor raw material cable can be wound on two or more primary wire drawing rollers to be drawn, so that the wire drawing device is suitable for wire drawing of the inner conductor raw material cables with multiple specifications and improves the wire drawing efficiency.

The first guide assembly 76 and the second guide assembly 719 are identical in structure and are each composed of roller seats 724 arranged in an up-down opposite manner, the roller seats 724 are fixedly arranged, and a plurality of freely-rotating shaft rollers are uniformly arranged on the roller seats 724.

The guide assembly is used for guiding the wire drawing direction of the inner conductor raw material cable and has a certain tension maintaining function of the inner conductor raw material cable.

The secondary wire drawing mechanism 77 comprises a sector panel 725 and a secondary wire drawing roller 726, the secondary wire drawing roller 726 comprises a positioning wire drawing roller 727 and a movable wire drawing roller 728, the sector panel 725 is fixedly arranged, an arc slideway 729 and a symmetrical second air cylinder 730 are arranged on the sector panel 725, the positioning wire drawing roller 727 is arranged on the sector panel 725 at a fixed point, and the movable wire drawing roller 728 is arranged at the arc slideway 729 in a sliding manner, is connected with the second air cylinder 730, is controlled by the second air cylinder 730 and slides along the arc guide of the arc slideway 729;

the second cylinder can control the movable wire drawing roller to slide along the arc-shaped slide way, so that the position of the movable wire drawing roller is adjusted, and the tension and the wire drawing strength of the inner conductor raw material cable at the wire outlet end of the secondary wire drawing mechanism are adjusted.

The third-time wire drawing mechanism 78 comprises a second rotating panel 731 and a third-time wire drawing roller 732, the third-time wire drawing roller 732 comprises 2 positioning wire drawing rollers 727, the second rotating panel 731 is circular, the middle part of the second rotating panel 731 is connected with a motor, the rotation of the second rotating panel 731 is controlled by the motor, and the 2 positioning wire drawing rollers 727 forming the third-time wire drawing roller 732 are symmetrically arranged on the second rotating panel 731 and rotate along with the second rotating panel 731;

the third-time wire drawing roller can rotate through the second rotating panel, so that the wire inlet angle of the wire inlet end and the wire outlet angle of the wire outlet end of the third-time wire drawing mechanism are adjusted, and the tension and the wire drawing strength of the inner conductor raw material cable are adjusted.

The third guide roller 79 and the fourth guide roller 710 are arranged between the tertiary wire drawing mechanism 78 and the movable guide assembly 711 and are arranged in a vertically staggered manner, the movable guide assembly 711 is composed of roller seats 724 which are arranged vertically and oppositely, the upper roller seats 7241 and the lower roller seats 7242 can be divided according to the vertical positions of the roller seats 724, the lower roller seats 7242 are fixedly arranged, the upper roller seats 7241 are connected with a third air cylinder 733, and the third air cylinder 733 controls the upper roller seats 7241 to lift;

the movable guide assembly is improved on the basis of the first guide assembly, and the lifting function of the third cylinder is used for achieving the function of adjusting the distance between the upper roller seat and the lower roller seat, so that the tension maintaining effect of the inner conductor raw material cable is improved on the premise of ensuring the guide function.

The fourth-time wire drawing mechanism 712 and the second-time wire drawing mechanism 77 have the same structure, the movable guide roller assembly 716 comprises a strip-shaped panel 734, a movable guide roller 735 and a fourth cylinder 736, the strip-shaped panel 734 is obliquely arranged and provided with a linear slideway 737, the fourth cylinder 736 is fixedly arranged at one end of the strip-shaped panel 734, the movable guide roller 735 is slidably arranged at the linear slideway 737 and connected with the fourth cylinder 736, and the movable guide roller 735 is controlled by the fourth cylinder 736 and slides along the linear slideway 737 in a guiding manner;

the movable guide roller is of a sliding type, the relative positions of the movable guide roller, the sixth guide roller and the seventh guide roller can be adjusted, the wire outlet angle of the wire outlet end of the sixth guide roller and the wire inlet angle of the wire inlet end of the seventh guide roller are further adjusted, the tension of the inner conductor raw material cables at the two ends of the movable guide roller is further adjusted, and stable wire take-up is ensured.

EXAMPLE III

The working method of the wire drawing device described in the second embodiment is as follows:

(a1) the inner conductor raw material cable is paid off by a paying-off roller 71, firstly, the inner conductor raw material cable bypasses a first guide roller 73 and a second guide roller 74, and the inner conductor raw material cable is stretched in a folding line;

(a2) Subsequently, the inner conductor raw material cable bypasses the primary drawing roller 721 on the primary drawing mechanism 75 to perform primary drawing, and the primary drawing roller 721 is rotationally switched by the first rotating panel 720 to switch the wire path of the corresponding specification and adjust the drawing specification;

(a3) After being guided by the first guide assembly 76, the inner conductor raw material cable subjected to the first wire drawing enters the secondary wire drawing mechanism 77, and is wound in a 78 shape between a positioning wire drawing roller 727 and a movable wire drawing roller 728 which form a secondary wire drawing roller 726 for secondary wire drawing;

(a4) The inner conductor raw material cable which finishes the second wire drawing enters a third wire drawing mechanism 78, the inner conductor raw material cable is wound in an 8-shaped manner among 2 positioning wire drawing rollers 27 forming a third wire drawing roller 732, and the third wire drawing is carried out;

(a5) The inner conductor raw material cable subjected to the third-time wire drawing is guided by the third guide roller 79 and the fourth guide roller 710 and then enters the movable guide assembly 711, and the upper roller seat 7241 of the movable guide assembly 711 can be lifted through the third cylinder 733, so that the tension of the inner conductor raw material cable can be adjusted;

(a6) The raw material cable of the inner conductor passes through the movable guide assembly 711 and enters the fourth-time wire drawing mechanism 712, and the fourth-time wire drawing is carried out in the same step (a 3);

(a7) The inner conductor raw material cable subjected to fourth-time wire drawing sequentially passes through a fifth guide roller 713, a first wire drawing die 714, a sixth guide roller 715, a movable guide roller assembly 716, a seventh guide roller 717, a second wire drawing die 718, a second guide assembly 719 and an eighth guide roller 750, is guided by the fifth guide roller 713, is subjected to fifth wire drawing by the first wire drawing die 714, is guided by the sixth guide roller 715, the movable guide roller assembly 716 and the seventh guide roller 717 in a combined manner, is subjected to second wire drawing die 718, is subjected to sixth wire drawing, and is finally guided by the second guide assembly 719 and the eighth guide roller 750 and is taken up by a wire take-up roller 72;

in the step (a3), the second cylinder 730 can control the movable wire drawing roller 728 to slide along the arc-shaped slideway 729, so as to adjust the position of the movable wire drawing roller 728, and further adjust the tension and the wire drawing strength of the inner conductor raw material cable at the outlet end of the secondary wire drawing mechanism 77, and in the step (a4), the tertiary wire drawing roller 732 rotates through the second rotating panel 731, so that the wire inlet angle of the wire inlet end and the wire outlet angle of the outlet end of the tertiary wire drawing mechanism 78 are adjusted, and the tension and the wire drawing strength of the inner conductor raw material cable are adjusted.

As described in the second and third embodiments, the wire drawing device performs step-by-step wire drawing by designing a multi-stage wire drawing mechanism, has high wire drawing stability and good quality precision, and meanwhile, a guide roller and a guide assembly are arranged between the multi-stage wire drawing mechanisms in an inserting manner to improve the guide effect of the inner conductor raw material cables and ensure the wire drawing precision, and also has good tension maintaining effect of the inner conductor raw material cables, and meanwhile, one wire drawing roller can be switched as required to adjust the wire path specification, and the same inner conductor raw material cables can be wound around a plurality of one wire drawing rollers to perform wire drawing, so that the wire drawing device is suitable for wire drawing of the inner conductor raw material cables with a plurality of specifications and improves the wire drawing efficiency, and the second cylinder can control the movable wire drawing roller to slide along the arc-shaped slide rail, further adjust the position of the movable wire drawing roller, and further adjust the tension and wire drawing strength of the inner conductor, the third-time wire drawing roller can rotate through the second rotating panel, so that the wire inlet angle of the wire inlet end and the wire outlet angle of the wire outlet end of the third-time wire drawing mechanism are adjusted, the tension and the wire drawing strength of the inner conductor raw material cable are adjusted, the wire outlet angle of the wire outlet end of the sixth guide roller and the wire inlet angle of the wire inlet end of the seventh guide roller are adjusted through the movable guide roller, the tension of the inner conductor raw material cable at the two ends of the movable guide roller is adjusted, and the stable wire winding.

Example four

Extrusion molding equipment includes extrusion molding aircraft nose 81, one side of extrusion molding aircraft nose 81 is equipped with the extrusion molding plastify mechanism 82 who supplies with the melting cable material, the quantity of extrusion molding plastify mechanism 82 is a plurality of, is 2 at least, and its upper end is equipped with the unloading mechanism 83 that is used for supplying with the cable material, and the cable material is through unloading mechanism unloading, gets into behind the extrusion molding plastify mechanism, and the plastify melts, finally gets into the extrusion molding aircraft nose, carries out the extrusion molding to the conductor sinle silk.

Wherein, the blanking mechanism 83 comprises a hopper 84, a rolling crushing component 85, a first feeding device 86 and a second feeding device 87, the rolling crushing component 85 is arranged under the hopper 84, the upper end of the rolling crushing component 85 is communicated with the hopper 84, the lower end of the rolling crushing component is communicated with the upper end of the first feeding device 86, 2 rolling rollers 88 and 2 which are extruded are arranged in the rolling crushing component 85 in a horizontal symmetrical mode and are controlled by a motor to rotate, the first feeding device 86 is a feeding auger and is arranged obliquely, the upper end of the first feeding device 86 is a feeding end, the lower end of the first feeding device 86 is a discharging end, the upper end of the second feeding device 87 is communicated with the rolling crushing component 85, the lower end of the second feeding device 87 is a feeding auger, one end of the second feeding device is communicated with the lower end of the first feeding device 86, the other end of the second feeding device is communicated with a plurality of the extrusion molding plasticizing mechanisms 82 through a first heat insulation pipeline 89, conveying the cable material to an extrusion plasticizing mechanism 82;

this unloading mechanism possesses the function of rolling, can carry out the breakage to the material and roll, reduces cable material granularity to reduce the melting degree of difficulty, improve melting efficiency, and reduce the heating energy consumption.

Wherein, the rotation directions of 2 rolling rollers 88 are opposite, which is convenient for the rolling.

The first feeding device 86 is a feeding auger and comprises a first cylinder 810 and a first feeding shaft 811, the first feeding shaft 811 is arranged along the axial direction of the first cylinder 810 and is driven by a motor, a spiral feeding blade 812 is arranged on the outer wall of the first feeding shaft 811, arc-shaped notches 813 are uniformly arranged on the feeding blade 812, and arc-shaped cutting edges are arranged at the arc-shaped notches 813;

the feeding blades of the first feeding device are provided with arc-shaped notches with arc-shaped cutting edges, and the rolled cable material can be cut for multiple times in the feeding process of the first feeding device, so that the average particle size of the cable material is reduced again.

The second feeding device 87 is a feeding auger and comprises a second cylinder 814, and a first heater 815 for preheating the cable material is embedded in the second cylinder 814;

the built-in first heater of second material feeding unit carries out preliminary preheating and softening to the cable material, can effectively reduce the melting degree of difficulty, and when preventing the extrusion molding, mix the solid material in the melting cable material, help promoting the extrusion molding effect, guarantee cable external insulation performance.

The extrusion plasticizing mechanism 82 comprises an extrusion cylinder 816 and an extrusion screw 817, wherein the extrusion screw 817 is axially arranged along the extrusion cylinder 816, one end of the extrusion screw 817 is connected with an extrusion motor 819 through a gear box 818 and is driven by the extrusion motor 819 to rotate, the extrusion cylinder 816 comprises an extrusion inlet 820 and an extrusion outlet 821, the extrusion inlet 820 is communicated with a second feeding device 87 through a first heat-preservation pipeline 89, the extrusion outlet 821 is communicated with an extrusion discharge header 823 through a second heat-preservation pipeline 822, the extrusion outlets 821 of the extrusion plasticizing mechanisms 82 are converged at the extrusion discharge header 823, and the extrusion discharge header 823 is a heat-preservation pipe and is connected with the extrusion head 81 to extrude cables;

the extrusion molding screw 817 is sequentially divided into a feeding section 824, a kneading section 825 and a melting section 826 along the axial direction, a pushing blade 827 is arranged on the outer wall of the feeding section 824, the pushing blade 827 is spiral, the kneading section 825 is provided with a plurality of kneading rings 828, the plurality of kneading rings 828 are sequentially arranged at equal intervals along the axis of the kneading section 825, the kneading rings 828 protrude out of the outer surface of the kneading section 825 and are frustum-shaped, and the outer surface of the frustum shape of the kneading rings 828 is provided with kneading grooves 829 which are distributed in an umbrella shape;

a plurality of sections of heaters are embedded in the extrusion cylinder 816, wherein the heaters are respectively a second heater 830 corresponding to the feeding section 824, a third heater 831 corresponding to the kneading section 825 and a fourth heater 832 corresponding to the melting section 826;

the extrusion molding screw rod designs according to the extrusion molding technology demand, set up the pay-off section, knead section and melting section, the pay-off section mainly used pay-off, and shear stress when the accessible pay-off (form shearing friction heat) and heater auxiliary heating function, provide the mixed heating effect, it softens and mixes to accelerate the cable material, it then is used for kneading and plastifying of cable material to knead the section, the cable material that gets into the section of kneading is kneaded in the extrusion between kneading ring and extrusion molding barrel, produce very big shear stress, rapid heating up and exhaust, thereby melt plastifying with higher speed, simultaneously, the frustum shape design of kneading the ring, can reduce the extrusion refluence of cable material to a certain extent, improve the stable effect of extrusion molding, at last cable material gets into the melting section, and in the melting section abundant melting, exhaust, plastify.

Wherein, a constant temperature heater for heat preservation and temperature regulation of the molten cable material is embedded in the extrusion molding discharge main pipe 823;

the main extrusion molding discharge pipe receives the molten cable material supplied by a plurality of extrusion molding plasticizing mechanisms, guides and preserves heat in the main extrusion molding discharge pipe, and finally supplies the molten cable material to the extrusion molding machine head to perform cable extrusion molding.

EXAMPLE five

The operating method of the extrusion apparatus described in example four is as follows:

(b1) the cable material is fed to the extrusion molding plasticizing mechanism 82 through the blanking mechanism 83, stored in the hopper 84 and then falls into the rolling crushing assembly 85, is rolled and crushed under the action of the rolling roller 88, the particle size of the cable material after the rolling crushing is reduced, and then enters the first feeding device 86, the first feeding shaft 811 of the first feeding device 86 rotates to push the cable material through the feeding blade 812, and meanwhile, the cable material is re-crushed through the arc cutting edge at the arc notch 813, and after the feeding crushing is completed, the cable material with low particle size enters the second feeding device 87, is preheated and softened under the action of the first heater 815, and finally enters the extrusion molding plasticizing mechanism 82 through the first heat insulation pipeline 89;

(b2) The preheated and softened cable material entering the extrusion plasticizing mechanism 82 gradually moves towards the extrusion molding machine head 81 under the action of an extrusion molding screw 817; at this time, the softened cable material firstly enters the feeding section 824, is fed through the feeding section 824, generates shear stress and is heated by the second heater 830, thereby rapidly heating and uniformly mixing; then enters a kneading section 825, is extruded and kneaded between a kneading ring 828 and the extrusion cylinder 816, is rapidly heated and exhausted to accelerate melting and plasticizing, and finally enters a melting section 826, is extruded, rubbed and rapidly heated between a spiral groove of the melting section 826 and the extrusion cylinder 816 to fully exhaust and plasticize;

(b3) After the cable material is fully melted, exhausted and plasticized, the melted cable material is the melted cable material, the melted cable material passes through the second heat preservation pipeline 822, enters the extrusion molding discharge main pipe 823, enters the extrusion molding machine head 81 through the extrusion molding discharge main pipe 823, performs extrusion molding on conductor cores, and the melted cable material entering the second heat preservation pipeline 822 is subjected to heat preservation and extrusion molding temperature adjustment through the constant temperature heater 833 in the second heat preservation pipeline 822.

Synthesize embodiment four and five extrusion molding equipment, possess the function that rolls, broken cable material, and can preheat the cable material, reduce the melting degree of difficulty, extrusion molding screw segmentation design possesses the effect of mediating, increase shear stress, exhaust with higher speed and reduction extrusion refluence, can effectively improve and mix effect, exhaust efficiency, melting efficiency, guarantees cable extrusion molding effect, improves cable external insulation performance.

According to the embodiment, the cable is simple in principle and reasonable in design, and the cable quality is improved through improvement of the wire drawing device and the extrusion molding equipment, wherein the wire drawing device adopts staged multistage wire drawing, the wire drawing stability is high, the quality precision is good, the improvement of the yield of conductor wires is facilitated, when the conductor wire stranded wires and the cabled conductor wire cores are used, burrs and other damages are not easy to occur, the surface is clean, the coating is easier during extrusion molding, the extrusion molding equipment has the functions of rolling and crushing the cable materials, and has the characteristics of kneading, increasing the shearing stress, accelerating exhaust and reducing extrusion backflow, the melting extrusion molding effect of the cable can be effectively improved, the extrusion molding quality is ensured, and the outer insulation performance of the cable is improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A weather-resistant insulated power cable is characterized in that the production steps comprise stay wires, stranded wires, cabling, armoring and extrusion molding, and the production steps comprise the following specific contents:

2. The weather-resistant insulated power cable as claimed in claim 1, wherein the drawing device comprises a paying-off roller and a taking-up roller, and a first guide roller, a second guide roller, a first drawing mechanism, a first guide assembly, a second drawing mechanism, a third guide roller, a fourth guide roller, a movable guide assembly, a fourth drawing mechanism, a fifth guide roller, a first drawing die, a sixth guide roller, a movable guide roller assembly, a seventh guide roller, a second drawing die, a second guide assembly and an eighth guide roller are sequentially arranged between the paying-off roller and the taking-up roller;

3. The weather-resistant insulated power cable of claim 2, wherein the drawing means is operated as follows:

4. the insulated weather-resistant power cable as claimed in claim 3, wherein in step (a3), the second cylinder controls the movable drawing roller to slide along the arc-shaped slideway, so as to adjust the position of the movable drawing roller, and further adjust the tension and the drawing strength of the inner conductor raw material cable at the outlet end of the secondary drawing mechanism.

5. The weather-resistant insulated power cable of claim 4, wherein the third drawing roller of step (a4) is rotated by a second rotating panel to adjust the wire inlet angle of the wire inlet end and the wire outlet angle of the wire outlet end of the third drawing mechanism, thereby adjusting the tension and the drawing strength of the inner conductor raw material cable.

6. A weather-resistant insulated power cable as claimed in claim 1, 3 or 5, characterized in that the extrusion apparatus comprises an extrusion head, one side of which is provided with an extrusion plasticizing means for supplying molten cable material, the number of said extrusion plasticizing means being plural, at least 2, and the upper end of which is provided with a blanking means for supplying cable material;

wherein, the rotation directions of 2 rolling rollers are opposite;

7. A weather resistant insulated power cable as claimed in claim 6, characterized in that the extrusion equipment works as follows: