A kind of overhead insulated cable extrusion process

Abstract

The invention discloses an overhead insulated cable extrusion process and equipment thereof. The extrusion process comprises the following steps: S1 pretreatment, in which metal wires and insulating materials are pretreated before extrusion, including cutting and marking steps, so as to ensure that the specifications, quality and length of the wires and insulating materials meet the requirements; S2 extrusion molding, in which the wires are unwound and the insulating materials are sent into an extruder, and are formed into wires and cables of required specifications through extrusion, plasticization and extrusion; S3 cooling and shaping, in which the wires and cables after extrusion are cooled by water bath and air cooling means to be shaped and their dimensional accuracy is determined; S4 quality testing, in which a cable series resonance test device is used to perform a withstand voltage test on the wires and cables, a high voltage tester is used to perform a leakage test on the wires and cables by a method of detecting partial discharge, and a cable scraping and abrasion tester is used to perform a wear resistance test on the wires and cables, so as to determine the insulation strength, electrical performance and service life indicators of the wires and cables.

Description

Technical Field

[0001] The invention belongs to the technical field of cable manufacturing, and in particular relates to an overhead insulated cable extrusion process. Background Art

[0002] Overhead cable (full name: overhead insulated cable) is an overhead conductor equipped with an insulating layer and a protective outer sheath. It is a special cable manufactured using a production process similar to that of cross-linked cables. It is a new way of power transmission between overhead conductors and underground cables. Overhead cables are all single-core. According to their different structures, they can be divided into hard aluminum wire structure, hard drawn copper wire structure, aluminum alloy wire structure, steel core or aluminum alloy core support structure and self-supporting three-core composite structure (the wire core can be hard aluminum or hard copper wire). It has the main characteristics of high power supply reliability, good power supply safety, convenient installation and maintenance, and reasonable economy. Its main technical parameters include weather resistance, insulation level, inner and outer semi-conductive shielding layers. Overhead cables are widely used in power transmission at home and abroad.

[0003] At present, a Chinese patent with publication number CN105976890A and publication date September 28, 2016 discloses a method for manufacturing a medium-strength aluminum alloy conductor overhead insulated cable, comprising the following steps: step 1: continuous casting and rolling; the continuous casting and rolling process is aluminum ingot smelting - alloy component configuration - casting - induction heating - rolling rod - winding rod; wherein the mass percentage of each element in the holding furnace is controlled as follows when the alloy component is configured: Si: 0.2-0.3wt%, Mg: 0.3-0.35wt%, Fe: 0.26-0.3 0wt%, Ti: 0.01~0.02wt%, rare earth: 0.09~0.12wt%, and the rest are aluminum and inevitable impurities; five measurement and control points are set on the insulation furnace for sampling and analysis, and the sample at each measurement and control point is the average value of three samples for chemical analysis, and the absolute error of the element content is controlled within the range of 0.004%; otherwise, it should be re-stirred and re-sampled and analyzed; Step 2: aluminum alloy wire drawing; Step 3: aging treatment; Step 4: multiple strands twisted; Step 5: insulation extrusion; Step 6: warm water cross-linking.

[0004] In step 5, the wire and cable extrusion process is required. The wire and cable extrusion process is to feed the metal conductor and the insulating material into the same extruder at the same time, and go through the processes of plasticization, extrusion, cooling and winding at a certain temperature and pressure to make wires or cables of required specifications. However, after extrusion and shaping, there is no good detection method in the prior art to detect various indicators of the extruded cable, which is not conducive to ensuring the quality of the finished cable. Summary of the invention

[0005] The purpose of the invention is to provide an overhead insulated cable extrusion process, which can carry out a systematic quality test on the extruded cable.

[0006] The above technical purpose of the present invention is achieved through the following technical scheme: an overhead insulated cable extrusion process, comprising the following steps:

[0007] S1 pretreatment: before extrusion, the metal wire and insulation material are pretreated, including cutting and marking steps, to ensure that the specifications, quality and length of the wire and insulation material meet the requirements;

[0008] S2 extrusion molding, after unwinding the wire, it is fed into the extruder with the insulating material, and after extrusion, plasticization and extrusion, it is formed into wires and cables of required specifications;

[0009] S3 cooling and shaping, the wires and cables after extrusion are cooled by water bath and air cooling to shape them and determine their dimensional accuracy;

[0010] S4 quality test, through the cable series resonance test device to conduct voltage resistance test, through the high voltage tester to detect partial discharge method to conduct leakage test, through the cable scrape test machine to conduct wear resistance test, so as to determine the insulation strength, electrical properties and service life indicators of wires and cables.

[0011] By adopting the above technical scheme, when performing the extrusion process, the metal wire is first pre-processed, including cutting and marking steps, to ensure that the specifications, quality and length of the wire and the insulating material meet the requirements; then extrusion molding is carried out, the wire is unwound and sent into the extruder with the insulating material, and after extrusion, plasticization and extrusion, it is formed into a wire and cable of the required specifications; then cooling and shaping are carried out, and the temperature is reduced by water bath and air cooling to make it fixed, and its dimensional accuracy is determined; finally, the cable product can be quality tested, wherein the cable series resonance test device is used to perform a withstand voltage test on it, the high voltage tester is used to perform a leakage test on it by detecting partial discharge, and the cable scrape and abrasion tester is used to perform a wear resistance test on it, so as to determine the insulation strength, electrical properties and service life indicators of the wire and cable, and realize systematic quality testing of the extruded cable.

[0012] The purpose of the invention is to provide an overhead insulated cable extrusion process device which can clean dust on the surface of the unwound wire.

[0013] The above technical purpose of the present invention is achieved through the following technical solutions: an overhead insulated cable extrusion process equipment, including an extruder body, and also includes a wire-unwinding device located on one side of the body and for unwinding the rolled wire, and a dust removal device located between the wire-unwinding device and the body and used to clean the surface of the wire. The wire-unwinding device includes a wire-unwinding frame, an air-expanding roller rotatably connected to the wire-unwinding frame and used to pass through the rolled wire barrel, and a reduction motor arranged on one side of the wire-unwinding frame and used to drive the air-expanding roller to rotate. The dust removal device includes a base plate, a first connecting arm arranged on the upper side of the base plate, a driving motor arranged at the upper end of the first connecting arm, a rotating sleeve arranged on the output shaft at one end of the driving motor, and bristles arranged on the peripheral side of the rotating sleeve and used to abut against the outer wall of the wire.

[0014] By adopting the above technical scheme, the rolled wire barrel is installed on the air expansion roller located on one side of the extruder body, and then the reduction motor is used to drive the air expansion roller to rotate to unwind the metal wire in the wire barrel, wherein the metal wire will first pass through the dust removal device, and the driving motor drives the rotating sleeve and the bristles to rotate, and the bristles can clean the outer wall of the metal wire, thereby ensuring that the surface of the wire entering the body has a high degree of cleanliness, which can ultimately help to ensure the quality of the finished cable.

[0015] The present invention is further configured as follows: a first bearing seat is provided on the substrate and on the side of the first connecting arm close to the machine body, a first rotating shaft is rotatably connected to the first bearing seat, and a guide wheel is fixed on the upper side of the first rotating shaft for the wire to pass through.

[0016] By adopting the above technical solution, after the wire passes through the dust removal device, the wire will pass through the guide wheel. At this time, the guide wheel can be used to support the wire, which is conducive to the stable contact of the wire with the lower side of the bristles.

[0017] The present invention is further configured as follows: a second connecting arm is arranged on the base plate and located on the side of the first bearing seat close to the body, a fixed blade is arranged on the upper end of the second connecting arm, a third connecting arm is also arranged on the base plate, a driving cylinder is arranged on the upper end of the third connecting arm, and a movable blade for cooperating with the fixed blade to cut the wire is arranged at the end of the piston rod of the driving cylinder.

[0018] By adopting the above technical solution, when the extruder body completes the cable extrusion operation of a specified length, the wire needs to be cut. The driving cylinder is used to drive the movable blade to move toward the fixed blade. Then the wire between the fixed blade and the movable blade can be cut by the fixed blade and the movable blade, and finally the wire can be cut.

[0019] The present invention is further configured as follows: an annular winding groove for winding up the excessively unwound wire is provided on the peripheral side of the guide wheel, and a driving component for driving the guide wheel to rotate after the wire is cut is provided on the base plate.

[0020] By adopting the above technical solution, after the extruder body completes the operation of extruding the specified length of cable, the reduction motor in the pay-off device will be cut off. However, after the reduction motor stops, the air expansion roller will continue to rotate for a period of time under the action of inertia, thereby unwinding a part of the wire, and at this time, this part of the wire will be scattered on the ground, which is not conducive to the orderly storage of the wire;

[0021] At this time, the annular winding groove opened on the peripheral side of the guide wheel is utilized, and the driving component is utilized to drive the guide wheel to rotate after the wire is cut. Then the guide wheel can wind the unwound wire into the annular winding groove, and finally the excess unwound wire can be efficiently collected.

[0022] The present invention is further configured as follows: the driving motor is a dual-axis motor and the output shaft at one end is connected to a rotating sleeve, and the driving assembly includes a driving pulley arranged on the output shaft of the driving motor away from the rotating sleeve, a second bearing seat arranged on the base plate, a second rotating shaft rotatably connected to the second bearing seat, a driven pulley arranged on the second rotating shaft, a transmission belt arranged between the driven pulley and the driving pulley, a rotating disk arranged at the end of the second rotating shaft, a linkage member arranged between the driving cylinder and the first rotating shaft and synchronously connecting the first rotating shaft and the rotating disk through the driving cylinder, and a plurality of bayonet sockets opened on the inner wall of the annular winding groove away from the movable blade and for the wire to be embedded.

[0023] By adopting the above technical scheme, the driving motor is a dual-axis motor and the output shaft at one end is connected to the rotating sleeve and the output shaft at the other end is connected to the active pulley. After the active pulley rotates, the driven pulley and the second rotating shaft can be driven to rotate through the transmission belt, and the second rotating shaft can drive the rotating disk to rotate. At this time, the first rotating shaft and the rotating disk are synchronously connected by a linkage member, so that the rotation of the rotating disk can drive the first rotating shaft to rotate, and then the guide wheel can be driven to rotate; wherein a plurality of bayonet holes are used on the inner wall of the annular winding groove away from the movable blade side. When the driving cylinder drives the movable blade toward the fixed blade side, the movable blade will first contact the wire transmitted from the guide wheel, thereby pushing the wire to move toward the side close to the fixed blade. At this time, the wire can be bent and embedded in any bayonet hole, and the bayonet hole limits the wire so that the rotation of the guide wheel can drive the wire to be wound in the annular winding groove.

[0024] A further setting of the present invention is that: the central axes of the first rotating shaft and the second rotating shaft coincide. The linkage member includes a collar provided on the circumferential side of the end of the rotating disc away from the second rotating shaft, a connecting plate located inside the collar and welded to the end of the first rotating shaft away from the guide wheel at the middle position, opening grooves opened at both ends of the connecting plate, sliders slidably connected in the opening grooves, locking rubber plates provided on the outer walls of the sliders on the sides away from the opening grooves and used for pressing against the inner wall of the collar, a connecting sleeve sleeved on the first rotating shaft, first connecting ears provided on both sides of the connecting sleeve, second connecting ears provided on the sides of the sliders away from the locking rubber plates, a connecting rod with one end hinged to the first connecting ear and the other end hinged to the second connecting ear, a ring groove opened on the circumferential side of the connecting sleeve, a swing arm located outside the ring groove and in a "C" shape, driving columns provided at both ends of the swing arm and embedded in the ring groove, a mounting sleeve provided on the side of the swing arm away from the connecting sleeve, a support column provided on the substrate and passing through the mounting sleeve, limiting rings provided on the support column and located at the upper and lower ends of the mounting sleeve respectively, a driving arm provided on the side of the mounting sleeve away from the swing arm, a connection port opened at the end of the driving arm away from the mounting sleeve and for the piston rod of the driving cylinder to pass through, a driving ring provided on the piston rod of the driving cylinder and used for pushing the driving arm, a fixing ring provided on the side of the first rotating shaft close to the first bearing seat, and a return spring sleeved on the first rotating shaft and connected to the connecting sleeve at one end and the fixing ring at the other end.

[0025] By adopting the above technical solution, when the driving cylinder drives the movable blade to move towards the side close to the fixed blade, the piston rod of the driving cylinder can push the driving arm through the driving ring, and the driving arm can drive the swing arm to swing. Among them, the swing arm can push the connecting sleeve to move closer to the connecting plate side through the driving column, and the return spring is elastically stretched. Subsequently, the connecting sleeve can drive the slider to move towards the side close to the collar through the first connecting ear, the connecting rod and the second connecting ear. At this time, the two sliders at both ends of the connecting plate can move towards the sides away from each other, so that the locking rubber plates on the sliders press against the inner wall of the collar. At this time, the rotation of the rotating disc can drive the connecting plate and the first rotating shaft to rotate, and finally the synchronous connection between the first rotating shaft and the rotating disc can be completed.

[0026] At the same time, when the driving cylinder drives the movable blade to move towards the side away from the fixed blade, the driving ring can be separated from the driving arm. Among them, under the action of the elastic restoring force of the return spring, the return spring can pull the connecting sleeve to move away from the connecting plate side. Subsequently, the connecting sleeve can drive the slider to move away from the collar side through the first connecting ear, the connecting rod and the second connecting ear. At this time, the two sliders at both ends of the connecting plate can move towards the sides close to each other, and finally the locking rubber plates on the sliders can be separated from the inner wall of the collar, so as to cancel the synchronous connection between the first rotating shaft and the rotating disc.

[0027] The present invention is further configured as follows: dovetail grooves are provided on inner walls on both sides of the open groove, and dovetail blocks embedded in the dovetail grooves are provided on both sides of the sliding block.

[0028] By adopting the above technical solution, the slider is embedded in the dovetail slot on the inner wall of the open slot by using the dovetail block, which is conducive to the stable back and forth sliding of the slider in the open slot.

[0029] The present invention is further configured as follows: a roller rotatably connected to the driving column and abutting against the inner wall of the annular groove.

[0030] By adopting the above technical solution, the roller on the driving column is used to abut against the inner wall of the annular groove, so that rolling friction is generated between the driving column and the annular groove, which is ultimately conducive to the smooth rotation of the connecting sleeve.

[0031] The beneficial effects of the present invention are as follows: the rolled wire barrel is mounted on the air expansion roller located on one side of the extruder body, and then the air expansion roller is driven by the reduction motor to rotate to unwind the metal wire in the wire barrel, wherein the metal wire first passes through the dust removal device, and the driving motor drives the rotating sleeve and the brush to rotate, and the brush can clean the outer wall of the metal wire, thereby ensuring that the surface of the wire entering the body has a high degree of cleanliness, which is ultimately conducive to ensuring the quality of the finished cable;

[0032] When the extruder body completes the operation of extruding the specified length of cable, the wire needs to be cut. The driving cylinder is used to drive the movable blade to move toward the fixed blade, and then the wire between the fixed blade and the movable blade can be cut by the fixed blade and the movable blade, and finally the wire can be cut. However, after the reduction motor stops, the air expansion roller will continue to rotate for a period of time under the action of inertia, thereby unwinding a part of the wire, and at this time, this part of the wire will be scattered on the ground, which is not conducive to the orderly storage of the wire.

[0033] At this time, the driving motor is a dual-axis motor and the output shaft at one end is connected to the rotating sleeve and the output shaft at the other end is connected to the driving pulley. After the driving pulley rotates, the driven pulley and the second rotating shaft can be driven to rotate through the transmission belt, and the second rotating shaft can drive the rotating disk to rotate; when the driving cylinder drives the movable blade to move toward the side close to the fixed blade, the piston rod of the driving cylinder can push the driving arm through the driving ring, and the driving arm can drive the swing arm to swing, wherein the swing arm can push the connecting sleeve toward the side of the connecting plate through the driving column, and the reset spring is elastically stretched, and then the connecting sleeve can drive the slider to move toward the side close to the ring sleeve through the first connecting ear, the connecting rod and the second connecting ear, and at this time, the two sliders at both ends of the connecting plate can move toward the side away from each other. , so that the locking rubber plate on the slider is pressed against the inner wall of the ring sleeve, and the rotation of the rotating disk can drive the connecting plate and the first rotating shaft to rotate, thereby completing the synchronous connection between the first rotating shaft and the rotating disk, so that the rotation of the rotating disk can drive the first rotating shaft to rotate, and then drive the guide wheel to rotate; wherein a plurality of bayonet holes are provided on the inner wall of the annular winding groove away from the movable blade side, when the driving cylinder drives the movable blade to approach the fixed blade side, the movable blade will first contact the wire transmitted from the guide wheel, thereby pushing the wire to move toward the side close to the fixed blade, and the wire can be bent and embedded in any bayonet hole at this time, and the bayonet hole can limit the wire, so that the rotation of the guide wheel can drive the wire to be wound in the annular winding groove;

[0034] When the excess wire is wound up, the driving cylinder is used to drive the movable blade to move toward the side away from the fixed blade, and the driving ring can be separated from the driving arm. Under the action of the elastic restoring force of the reset spring, the reset spring can pull the connecting sleeve to move toward the side away from the connecting plate, and then the connecting sleeve can drive the slider to move toward the side away from the ring sleeve through the first connecting ear, the connecting rod and the second connecting ear. At this time, the two sliders at both ends of the connecting plate can move toward the side close to each other, and finally the locking rubber plate on the slider can be separated from the inner wall of the ring sleeve, thereby canceling the synchronous connection between the first rotating shaft and the rotating disk. After the first rotating shaft stops rotating, the guide wheel can also stop rotating, and finally the excess unwound wire can be efficiently stored. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1is a plan view of the connection relationship between the body of the extruder, the wire-releasing device and the dust-removing device in the present invention, wherein the wires are represented by dotted lines;

[0037] Figure 2 It is a structural schematic diagram of the dust removal device in the present invention;

[0038] Figure 3 It is a partial enlarged view of the connection relationship between the first rotating shaft, the rotating disk and the linkage member in the present invention;

[0039] Figure 4 It is a partial cross-sectional view of the connection relationship between the first rotating shaft, the rotating disk and the linkage member in the present invention. At this time, under the elastic restoring force of the reset spring, the reset spring pulls the connecting sleeve to move toward the side away from the connecting plate, and the connecting sleeve drives the slider to move toward the side away from the ring sleeve through the first connecting ear, the connecting rod and the second connecting ear, and the two sliders move toward the side close to each other;

[0040] Figure 5 It is a partial cross-sectional view of the connection relationship between the connecting plate, the dovetail chute, the slider and the dovetail block in the present invention;

[0041] Figure 6 It is a partial cross-sectional view of the connection relationship between the first rotating shaft, the rotating disk and the linkage member in the present invention. At this time, because the swing arm pushes the connecting sleeve toward the connecting plate side through the driving column, the connecting sleeve drives the slider to move toward the side close to the ring sleeve through the first connecting ear, the connecting rod and the second connecting ear, so that the locking rubber plate on the slider is pressed against the inner wall of the ring sleeve;

[0042] Figure 7 It is a structural top view of the dust removal device in the present invention. At this time, the driving cylinder drives the movable blade to move toward the side close to the fixed blade, and the piston rod of the driving cylinder pushes the driving arm through the driving ring, so that the locking rubber plate on the slider is pressed against the inner wall of the ring sleeve. At the same time, the movable blade pushes the wire to move toward the side close to the fixed blade, and the wire is embedded in any bayonet after being bent, and the wire is represented by a dotted line.

[0043] In the figure, 1, machine body; 2, pay-off device; 21, pay-off frame; 22, air expansion roller; 23, reduction motor; 3, dust removal device; 31, base plate; 32, first connecting arm; 33, driving motor; 34, rotating sleeve; 35, bristles; 4, first bearing seat; 41, first rotating shaft; 42, guide wheel; 421, annular winding groove; 5, second connecting arm; 51, fixed blade; 6, third connecting arm; 61, driving cylinder; 611, movable blade; 7, driving assembly; 71, driving pulley; 72, second bearing seat; 73, second rotating shaft; 74, driven pulley; 75, transmission belt; 76, rotating disk; 77, Linkage; 771, ring sleeve; 772, connecting plate; 773, opening groove; 7731, dovetail slide groove; 774, slider; 7741, dovetail block; 775, locking rubber plate; 776, connecting sleeve; 777, first connecting ear; 778, second connecting ear; 779, connecting rod; 7701, ring groove; 7702, swing arm; 7703, driving column; 77031, roller; 7704, mounting sleeve; 7705, supporting column; 7706, limiting ring; 7707, driving arm; 7708, connecting port; 7709, driving ring; 7710, fixing ring; 7711, reset spring; 78, bayonet. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] An overhead insulated cable extrusion process comprises the following steps:

[0046] S1 pretreatment: before extrusion, the metal wire and insulation material are pretreated, including cutting and marking steps, to ensure that the specifications, quality and length of the wire and insulation material meet the requirements;

[0047] S2 extrusion molding, after unwinding the wire, it is fed into the extruder with the insulating material, and after extrusion, plasticization and extrusion, it is formed into wires and cables of required specifications;

[0048] S3 cooling and shaping, the wires and cables after extrusion are cooled by water bath and air cooling to shape them and determine their dimensional accuracy;

[0049] S4 quality test, through the cable series resonance test device to conduct voltage resistance test, through the high voltage tester to detect partial discharge method to conduct leakage test, through the cable scrape test machine to conduct wear resistance test, so as to determine the insulation strength, electrical properties and service life indicators of wires and cables.

[0050] Principle: During the extrusion process, the metal wire is first pre-treated, including cutting and marking steps, to ensure that the specifications, quality and length of the wire and insulating material meet the requirements; then extrusion molding is carried out, the wire is unwound and sent into the extruder with the insulating material, and after extrusion, plasticization and extrusion, it is formed into wires and cables of the required specifications; then it is cooled and shaped, and the temperature is reduced by water bath and air cooling to make it fixed, and its dimensional accuracy is determined; finally, the cable product can be quality tested, including a cable series resonance test device for withstand voltage test, a high voltage tester for leakage test by detecting partial discharge, and a cable scrape and abrasion tester for wear resistance test, so as to determine the insulation strength, electrical properties and service life indicators of the wires and cables, and realize systematic quality testing of the extruded cables.

[0051] An overhead insulated cable extrusion process equipment, referring to Figure 1 , Figure 2 The equipment of the overhead insulated cable extrusion process includes an extruder body 1, a pay-off device 2 located at one side of the body 1 and for unwinding the rolled wire, and a dust removal device 3 located between the pay-off device 2 and the body 1 and for cleaning the surface of the wire, wherein the pay-off device 2 includes a pay-off frame 21, an air-expansion roller 22, and a reduction motor 23, the pay-off frame 21 is fixed to the ground at one side of the body 1 by anchor bolts, and the air-expansion roller 22 is rotatably connected to the upper side of the pay-off frame 21 by a bearing, and the air-expansion roller 22 is provided for the installation of the rolled wire barrel, and the reduction motor 23 drives the air-expansion roller 22 to rotate through a belt drive.

[0052] Reference Figure 1 , Figure 2 The dust removal device 3 includes a base plate 31, a first connecting arm 32, a driving motor 33, a rotating sleeve 34, and bristles 35, wherein the base plate 31 is fixed to the ground between the pay-off frame 21 and the body 1 by anchor bolts, and the first connecting arm 32 is welded to the upper side of the base plate 31, and the driving motor 33 is fixed to the upper end of the first connecting arm 32 by bolts, and the rotating sleeve 34 is fixed to the output shaft of the driving motor 33 by bolts, wherein the bristles 35 are bonded to the outer wall of the rotating sleeve 34, and the bristles 35 can be used to contact the outer wall of the wire, and this type of driving motor 33 is a dual-axis motor.

[0053] Reference Figure 1 , Figure 2A first bearing seat 4 is welded on the substrate 31 and located on the side of the first connecting arm 32 close to the body 1, and a first rotating shaft 41 is rotatably connected to the first bearing seat 4 through a bearing, wherein a guide wheel 42 is fixed to the first rotating shaft 41 by bolts, and the upper side of the guide wheel 42 can be used for the wire to pass through; at the same time, a second connecting arm 5 is welded on the substrate 31 and located on the side of the first bearing seat 4 close to the body 1, and a fixed blade 51 is fixed to the upper end of the second connecting arm 5 by bolts, wherein a third connecting arm 6 is also welded on the substrate 31, and a driving cylinder 61 is fixed to the upper end of the third connecting arm 6 by bolts, and a movable blade 611 is fixed to the piston rod end of the driving cylinder 61 by bolts, and the wire passing through the guide wheel 42 passes through the position between the fixed blade 51 and the movable blade 611, and the movable blade 611 can be used to cooperate with the fixed blade 51 to cut the wire.

[0054] Reference Figure 2 , Figure 3 , an annular winding groove 421 is provided on the circumferential side of the guide wheel 42, and the annular winding groove 421 can be used to wind up the wire that is over-wound; wherein the base plate 31 is also provided with a driving assembly 7 for driving the guide wheel 42 to rotate after the wire is cut, and the driving assembly 7 includes a driving pulley 71, a second bearing seat 72, a second rotating shaft 73, a driven pulley 74, a transmission belt 75, a rotating disk 76, a linkage member 77, and a plurality of bayonet 78, wherein the driving pulley 71 is key-connected to the output shaft of the driving motor 33 away from the rotating sleeve 34, and the second bearing seat 72 is welded to the base plate 31, and the second rotating shaft 73 is rotatably connected to the second bearing seat 7 2, and the central axes of the first rotating shaft 41 and the second rotating shaft 73 coincide, and the driven pulley 74 is key-connected to the second rotating shaft 73, wherein the transmission belt 75 is connected between the driven pulley 74 and the driving pulley 71, and the rotating disk 76 is welded to the end of the second rotating shaft 73, and the linkage member 77 is arranged between the driving cylinder 61 and the first rotating shaft 41 and the first rotating shaft 41 and the rotating disk 76 are synchronously connected through the driving cylinder 61, and a plurality of bayonet holes 78 are opened on the inner wall of the annular winding groove 421 away from the movable blade 611 and are provided for the wire to be embedded, and the plurality of bayonet holes 78 are evenly distributed along the circumference of the annular winding groove 421.

[0055] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7, the linkage member 77 includes a collar 771, a connecting plate 772, an opening groove 773, a slider 774, a locking rubber plate 775, a connecting sleeve 776, a first connecting ear 777, a second connecting ear 778, a connecting rod 779, an annular groove 7701, a swing arm 7702, a driving column 7703, a mounting sleeve 7704, a support column 7705, a limiting ring 7706, a driving arm 7707, a connection port 7708, a driving ring 7709, a fixing ring 7710, and a return spring 7711; wherein the collar 771 is integrally provided on the circumferential side of the rotating disk 76 at the end away from the second rotating shaft 73, and the connecting plate 772 is located inside the collar 771 and is strip-shaped. At the same time, the middle part of the connecting plate 772 is welded and fixed to the end of the first rotating shaft 41 away from the guide wheel 42. The opening groove 773 is opened at both ends of the connecting plate 772. The slider 774 is slidably connected inside the opening groove 773. Dovetail chutes 7731 are opened on both inner walls of the opening groove 773, and the extending direction of the dovetail chutes 7731 is parallel to the extending direction of the connecting plate 772. At the same time, dovetail blocks 7741 embedded in the dovetail chutes 7731 are integrally provided on both sides of the slider 774; the locking rubber plate 775 is adhesively fixed to the outer wall of the slider 774 on the side away from the opening groove 773 and is used to abut against the inner wall of the collar 771. The connecting sleeve 776 is sleeved on the first rotating shaft 41. The first connecting ear 777 is welded at both sides of the connecting sleeve 776, and the second connecting ear 778 is welded on the side of the slider 774 away from the locking rubber plate 775. One end of the connecting rod 779 is hinged to the first connecting ear 777 and the other end is hinged to the second connecting ear 778. The annular groove 7701 is opened on the circumferential side of the connecting sleeve 776. The swing arm 7702 is located outside the annular groove 7701 and is in a "C" shape. The driving column 7703 is welded at both ends of the swing arm 7702 and is embedded in the annular groove 7701. A roller 77031 that abuts against the inner wall of the annular groove 7701 is rotatably connected to the driving column 7703 through a bearing; the mounting sleeve 7704 is welded to the side of the swing arm 7702 away from the connecting sleeve 776. The support column 7705 has its lower end welded to the base plate 31 and its upper end is used to pass through the mounting sleeve 7704. At the same time, the limiting ring 7706 is integrally provided on the support column 7705 and is located at the upper and lower ends of the mounting sleeve 7704 respectively. The position of the mounting sleeve 7704 on the support column 7705 can be positioned by the two limiting rings 7706. The driving arm 7707 is welded to the side of the mounting sleeve 7704 away from the swing arm 7702. The connection port 7708 is opened at the end of the driving arm 7707 away from the mounting sleeve 7704 and is for the piston rod of the driving cylinder 61 to pass through. The driving ring 7709 is welded to the piston rod of the driving cylinder 61 and is used to push the driving arm 7707;Meanwhile, the fixing ring 7710 is welded to the side of the first rotating shaft 41 close to the first bearing seat 4, and the return spring 7711 is sleeved on the first rotating shaft 41, wherein one end of the return spring 7711 is welded to the connecting sleeve 776 and the other end is welded to the fixing ring 7710. ;

[0056] Principle: The rolled wire barrel is mounted on the air expansion roller 22 located on one side of the extruder body 1, and then the reduction motor 23 is used to drive the air expansion roller 22 to rotate to unwind the metal wire in the wire barrel, wherein the metal wire first passes through the dust removal device 3, and the driving motor 33 drives the rotating sleeve 34 and the brush 35 to rotate, and the brush 35 can clean the outer wall of the metal wire, thereby ensuring that the surface of the wire entering the body 1 has a high degree of cleanliness, which is ultimately conducive to ensuring the quality of the finished cable;

[0057] When the extruder body 1 completes the operation of extruding a cable of a specified length, the wire needs to be cut, wherein the driving cylinder 61 is used to drive the movable blade 611 to move toward the side of the fixed blade 51, and then the wire between the fixed blade 51 and the movable blade 611 can be cut by the fixed blade 51 and the movable blade 611, and finally the wire can be cut; however, after the reduction motor 23 stops, the air expansion roller 22 will continue to rotate for a period of time under the action of inertia, thereby unwinding a part of the wire, and at this time, this part of the wire will be scattered on the ground, which is not conducive to the orderly storage of the wire;

[0058] At this time, the driving motor 33 is a double-axis motor, and the output shaft at one end is connected to the rotating sleeve 34, while the output shaft at the other end is connected to the driving pulley 71. After the driving pulley 71 rotates, the driven pulley 74 and the second rotating shaft 73 can be driven to rotate through the transmission belt 75, and the second rotating shaft 73 can drive the rotating disk 76 to rotate; wherein when the driving cylinder 61 drives the movable blade 611 to move toward the side close to the fixed blade 51, the piston rod of the driving cylinder 61 can push the driving arm 7707 through the driving ring 7709, and the driving arm 7707 can drive the swing arm 7702 to swing, wherein the swing arm 7702 can push the connecting sleeve 776 toward the side of the connecting plate 772 through the driving column 7703, and the reset spring 7711 is elastically stretched, and then the connecting sleeve 776 can drive the slider 774 to move toward the side close to the ring sleeve 771 through the first connecting ear 777, the connecting rod 779 and the second connecting ear 778. At this time, the two sliders 77 4 can move toward the side away from each other, so that the locking rubber plate 775 on the slider 774 is pressed against the inner wall of the ring sleeve 771. At this time, the rotation of the rotating disk 76 can drive the connecting plate 772 and the first rotating shaft 41 to rotate, thereby completing the synchronous connection between the first rotating shaft 41 and the rotating disk 76, so that the rotation of the rotating disk 76 can drive the first rotating shaft 41 to rotate, and then drive the guide wheel 42 to rotate; wherein a plurality of bayonet holes 78 are provided on the inner wall of the annular winding groove 421 away from the movable blade 611. When the driving cylinder 61 drives the movable blade 611 to approach the fixed blade 51, the movable blade 611 will first contact the wire transmitted from the guide wheel 42, thereby pushing the wire to move toward the side close to the fixed blade 51. At this time, the wire can be bent and embedded in any bayonet hole 78, and the bayonet hole 78 has a limiting effect on the wire, so that the rotation of the guide wheel 42 can drive the wire to be wound in the annular winding groove 421;

[0059] When the excess wire is wound up, the driving cylinder 61 is used to drive the movable blade 611 to move toward the side away from the fixed blade 51, and the driving ring 7709 can be separated from the driving arm 7707. Under the action of the elastic restoring force of the reset spring 7711, the reset spring 7711 can pull the connecting sleeve 776 to move toward the side away from the connecting plate 772, and then the connecting sleeve 776 can drive the slider 774 to move toward the side away from the ring sleeve 771 through the first connecting ear 777, the connecting rod 779 and the second connecting ear 778. At this time, the two sliders 774 at both ends of the connecting plate 772 can move toward the side close to each other, and finally the locking rubber plate 775 on the slider 774 can be separated from the inner wall of the ring sleeve 771, thereby canceling the synchronous connection between the first rotating shaft 41 and the rotating disk 76. After the first rotating shaft 41 stops rotating, the guide wheel 42 can also stop rotating, and finally the excess unwound wire can be efficiently stored.

Claims

1. An overhead insulated cable extrusion process, characterized in that: The steps include: S1 pretreatment: before extrusion, the metal wire and insulation material are pretreated, including cutting and marking steps, to ensure that the specifications, quality and length of the wire and insulation material meet the requirements; S2 extrusion molding, after unwinding the wire, it is fed into the extruder with the insulating material, and after extrusion, plasticization and extrusion, it is formed into wires and cables of required specifications; S3 cooling and shaping, the wires and cables after extrusion are cooled by water bath and air cooling to shape them and determine their dimensional accuracy; S4 quality test, through the cable series resonance test device to conduct a withstand voltage test, through the high voltage tester to detect partial discharge to conduct a leakage test, through the cable scrape test machine to conduct a wear resistance test, so as to determine the insulation strength, electrical performance and service life indicators of the wire and cable; The extruder of step S2 comprises an extruder body (1), and also comprises a wire-releasing device (2) located on one side of the body (1) and for unreeling a coiled wire, and a dust-removing device (3) located between the wire-releasing device (2) and the body (1) and for cleaning the surface of the wire, wherein the wire-releasing device (2) comprises a wire-releasing frame (21), an air-expansion roller (22) rotatably connected to the wire-releasing frame (21) and for passing the coiled wire barrel, and a reduction motor (23) arranged on one side of the wire-releasing frame (21) and for driving the air-expansion roller (22) to rotate, and the dust-removing device (3) comprises a base plate (31), a first connecting arm (32) arranged on the upper side of the base plate (31), a driving motor (33) arranged at the upper end of the first connecting arm (32), a rotating sleeve (34) arranged on an output shaft at one end of the driving motor (33), and bristles (35) arranged on the peripheral side of the rotating sleeve (34) and for contacting the outer wall of the wire; A first bearing seat (4) is provided on the base plate (31) and located on a side of the first connecting arm (32) close to the machine body (1); a first rotating shaft (41) is rotatably connected to the first bearing seat (4); a guide wheel (42) is fixed on the first rotating shaft (41) for the conductor to pass through; A second connecting arm (5) is provided on the base plate (31) and located on a side of the first bearing seat (4) close to the body (1); a fixed blade (51) is provided at the upper end of the second connecting arm (5); a third connecting arm (6) is further provided on the base plate (31); a driving cylinder (61) is provided at the upper end of the third connecting arm (6); a movable blade (611) for cooperating with the fixed blade (51) to cut the wire is provided at the end of the piston rod of the driving cylinder (61); The guide wheel (42) is provided with an annular winding groove (421) for winding up the excessively unwound wire on its circumference, and the base plate (31) is provided with a driving assembly (7) for driving the guide wheel (42) to rotate after the wire is cut; The driving motor (33) is a double-shaft motor and the output shaft at one end is connected to the rotating sleeve (34). The driving assembly (7) comprises a driving pulley (71) arranged on the output shaft of the driving motor (33) at one end away from the rotating sleeve (34), a second bearing seat (72) arranged on the base plate (31), a second rotating shaft (73) rotatably connected to the second bearing seat (72), a driven pulley (74) arranged on the second rotating shaft (73), a transmission belt (75) arranged between the driven pulley (74) and the driving pulley (71), a rotating disk (76) arranged at the end of the second rotating shaft (73), a linkage member (77) arranged between the driving cylinder (61) and the first rotating shaft (41) and synchronously connecting the first rotating shaft (41) and the rotating disk (76) through the driving cylinder (61), and a plurality of bayonet holes (78) provided on the inner wall of the annular winding groove (421) away from the movable blade (611) and for inserting wires.

2. An overhead insulated cable extrusion process according to claim 1, characterized in that: The central axes of the first rotating shaft (41) and the second rotating shaft (73) coincide. The linkage member (77) includes a collar (771) arranged on the circumferential side of the end of the rotating disc (76) far from the second rotating shaft (73), a connecting plate (772) located inside the collar (771) and welded to the end of the first rotating shaft (41) far from the guide wheel (42) at the middle position, an opening groove (773) opened at both ends inside the connecting plate (772), a slider (774) slidably connected inside the opening groove (773), a locking rubber plate (775) arranged on the outer wall of the slider (774) on the side far from the opening groove (773) and used to press against the inner wall of the collar (771), a connecting sleeve (776) sleeved on the first rotating shaft (41), a first connecting ear (777) arranged on both sides of the connecting sleeve (776), a second connecting ear (778) arranged on the side of the slider (774) far from the locking rubber plate (775), a connecting rod (779) with one end hinged to the first connecting ear (777) and the other end hinged to the second connecting ear (778), an annular groove (7701) opened on the circumferential side of the connecting sleeve (776), a swing arm (7702) located outside the annular groove (7701) and in a "C" shape, a driving column (7703) arranged at both ends inside the swing arm (7702) and embedded in the annular groove (7701), a mounting sleeve (7704) arranged on the side of the swing arm (7702) far from the connecting sleeve (776), a support column (7705) arranged on the base plate (31) and passing through the mounting sleeve (7704), a limiting ring (7706) arranged on the support column (7705) and located at the upper and lower ends of the mounting sleeve (7704) respectively, a driving arm (7707) arranged on the side of the mounting sleeve (7704) far from the swing arm (7702), a connecting port (7708) opened at the end of the driving arm (7707) far from the mounting sleeve (7704) for the piston rod of the driving cylinder (61) to pass through, a driving ring (7709) arranged on the piston rod of the driving cylinder (61) and used to push the driving arm (7707), a fixing ring (7710) arranged on the side of the first rotating shaft (41) close to the first bearing seat (4), and a return spring (7711) sleeved on the first rotating shaft (41) and connected to the connecting sleeve (776) at one end and the fixing ring (7710) at the other end.

3. An overhead insulated cable extrusion process according to claim 2, characterized in that: Dovetail chutes (7731) are opened on the inner walls on both sides of the opening groove (773), and dovetail blocks (7741) are arranged on both sides of the slider (774) and embedded in the dovetail chutes (7731).

4. An overhead insulated cable extrusion process according to claim 3, characterized in that: A roller (77031) in rotational connection with the driving column (7703) abuts against the inner wall of the annular groove (7701).

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