A compact conductor cable and a compact forming system for its production

Abstract

The present invention belongs to the technical field of cable manufacturing, and specifically relates to a compressed conductor cable and a compression molding system for its production, wherein the compressed conductor cable comprises a central conductor, a first ring body, a second ring body, a third ring body, a water-blocking insulating layer and a sheath; the first ring body is composed of a plurality of first fan-ring conductors tightly fitting around the central conductor in the circumferential direction; the second ring body is composed of a plurality of second fan-ring conductors tightly fitting around the first ring body in the circumferential direction; the third ring body is composed of a plurality of Z-shaped conductors tightly fitting around the second ring body in the circumferential direction; the water-blocking insulating layer is sleeved on the outside of the third ring body; the sheath is sleeved on the outside of the water-blocking insulating layer. The present invention can reduce the compression degree of the outer layer on the basis of ensuring that the gap in the inner layer of the cable is small, so that the tensile strength and elongation of the copper wire in the compressed conductor after compression and deformation will not be greatly reduced, thereby ensuring the tensile strength and toughness of the cable.

Description

Technical Field

[0001] The invention belongs to the technical field of cable manufacturing, and in particular relates to a compacted conductor cable and a compacting molding system for producing the same. Background Art

[0002] Special-shaped conductors are trapezoidal monofilament stranded conductors, which are used in copper and aluminum conductors. Compared with traditional conductors, under the premise of meeting the national standard GB / T3956-2008 cable conductors, they adopt a trapezoidal monofilament structure. The conductors are twisted together more tightly, with low resistivity and good conductivity. The compression coefficient is greatly improved, which can reach more than 96%. The outer diameter of the conductor is smaller under the same cross-section, which reduces the outer diameter of the cable and saves the use of other materials.

[0003] A Chinese document with publication number CN114822922B discloses a special-shaped conductor cable, comprising a central conductor and a plurality of first fan-ring conductors arranged around the central conductor, a plurality of second fan-ring conductors arranged around the first fan-ring conductor, and a plurality of Z-shaped conductors arranged around the second fan-ring conductor, wherein the cross-sections of the first fan-ring conductor, the second fan-ring conductor and the Z-shaped conductor are all fan-shaped, wherein: the central angle range of the first fan-ring conductor is 40 to 120°, and the length ratio of the short arc to the long arc is 1:2.4 to 3; the central angle range of the second fan-ring conductor is 30 to 60°, and the length ratio of the short arc to the long arc is 1:1.4 to 2; the central angle range of the Z-shaped conductor is 20 to 36°, and the length ratio of the short arc to the long arc is 1:1.2 to 1.6; the special-shaped conductor cable is characterized by reducing material usage and improving the electrical performance of the cable.

[0004] Our company found some deficiencies in the process of producing and applying the above-mentioned special-shaped conductor cables. First, due to the excessive degree of compression, the tensile strength and elongation of the copper wire in the compressed conductor after compression and deformation are greatly reduced, resulting in a decrease in the tensile strength of the cable and a decrease in toughness; at the same time, when performing water-blocking design, it cannot be filled with water-blocking ropes or water-blocking yarns like round compressed conductors. Therefore, effective water-blocking design must be carried out to give full play to the advantages of the profiled wire on submarine cables with water-blocking requirements; second, the twisting devices of the corresponding compression molding systems are mostly split structures, which occupy a large volume; during the twisting process, each wire roll rotates in the vertical direction, which is prone to stability problems such as shaking; third, the design of the twisting device of the corresponding compression molding system is not reasonable. Due to the irregular shape of the special-shaped conductor cable, it is easy to deflect and dislocate during the twisting process, which makes it impossible for the special-shaped conductor monomers to be completely twisted together in sequence.

[0005] Therefore, it is necessary to optimize and improve the existing compressed conductor cables and the compression molding systems used in their production. Summary of the invention

[0006] The object of the present invention is to overcome at least one of the above problems existing in the prior art and to provide a compacted conductor cable and a compacting and forming system for producing the same.

[0007] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0008] The present invention provides a compressed conductor cable, comprising:

[0009] Center conductor;

[0010] A first ring body, the first ring body is composed of a plurality of first fan ring conductors tightly fitted around the central conductor in the circumferential direction;

[0011] A second ring body, the second ring body being composed of a plurality of second sector ring conductors tightly fitted around the first ring body in the circumferential direction;

[0012] A third ring body, the third ring body being composed of a plurality of Z-shaped conductors tightly fitted around the second ring body in the circumferential direction;

[0013] A water-blocking insulating layer, wherein the water-blocking insulating layer is sleeved on the outer side of the third ring body;

[0014] The sheath is arranged on the outer side of the water-blocking insulating layer.

[0015] Further, in the above-mentioned compressed conductor cable, the central angle of the first fan ring conductor is 60°, and the length ratio of the short arc to the long arc is 1:2.4-3;

[0016] The central angle of the second sector ring conductor is 36°, and the length ratio of the short arc to the long arc is in the range of 1:1.4 to 2;

[0017] The central angle of the Z-shaped conductor is 20°, the central angle corresponding to the convex part / concave part at the end is 5°, and the ratio of the thickness value to the length value of the Z-shaped conductor itself is in the range of 1:1.2 to 1.6; the Z-shaped conductor is provided with rounded corners at each corner point, and the ratio of the diameter value of the rounded corner to the thickness value of the Z-shaped conductor is in the range of 1:5.6 to 7.8.

[0018] Furthermore, in the above-mentioned compact conductor cable, the water-blocking insulating layer is formed by curing the insulating water-blocking glue;

[0019] The sheath is a polyethylene sheath.

[0020] The present invention also provides a compression molding system for producing the above-mentioned compressed conductor cable, the compression molding system comprises an integrated vertical twisting device, a central conductor pay-off frame, a lower steering wheel, a pressure-maintaining die, an upper steering wheel, a water-blocking glue spraying assembly, a curing and drying assembly, a sheath extrusion molding assembly, a cold water tank and a compressed conductor cable take-up frame, the central conductor pay-off frame is arranged below the integrated vertical twisting device, the central conductor pulled out by the central conductor pay-off frame passes through the integrated vertical twisting device after being turned by the lower steering wheel, the integrated vertical twisting device sequentially twists the outer side of the central conductor into a first ring body, a second ring body and a third ring body, and forms a compact core body in the pressure-maintaining die; after the compact core body is turned by the upper steering wheel, it is sprayed with glue by the water-blocking glue spraying assembly and cured by the curing and drying assembly to form a water-blocking insulating layer on the surface, and then it is coated with plastic by the sheath extrusion molding assembly and cooled by the cold water tank to form a sheath on the surface, and finally the compressed conductor cable is rolled up by the compressed conductor cable take-up frame.

[0021] Furthermore, in the above-mentioned compression molding system, the integrated vertical stranding device includes a rotary drive, a first fan-ring conductor pay-off frame, a second fan-ring conductor pay-off frame, a Z-shaped conductor pay-off frame, a straightening frame, a first pay-off drum, a second pay-off drum and a third pay-off drum, and the upper side of the rotary drive is installed with the first fan-ring conductor pay-off frame, the second fan-ring conductor pay-off frame and the Z-shaped conductor pay-off frame distributed in a circular array from the inside to the outside, and the upper side of the rotary drive is supported by the first pay-off drum, the second pay-off drum and the third pay-off drum from low to high through the straightening frame respectively, the first fan-ring conductor pay-off frame and the first pay-off drum rotate synchronously around the central axis of the rotary drive, the second fan-ring conductor pay-off frame and the second pay-off drum rotate synchronously around the central axis of the rotary drive, and the Z-shaped conductor pay-off frame and the third pay-off drum rotate synchronously around the central axis of the rotary drive.

[0022] Furthermore, in the above-mentioned compression molding system, the rotary drive includes an outer cover, a center through tube, a first swivel, a second swivel, a third swivel and a swivel bearing. The center through tube is fixedly installed at the center of the outer cover. The outer cover is located on the periphery of the center through tube and is provided with a first swivel, a second swivel and a third swivel in sequence from the inside to the outside. The first swivel, the second swivel and the third swivel are respectively installed on the lower side of a swivel bearing for driving them to rotate.

[0023] Furthermore, in the above-mentioned compression molding system, the first fan ring conductor pay-off frame, the second fan ring conductor pay-off frame, and the Z-shaped conductor pay-off frame are respectively installed on the first rotating ring, the second rotating ring, and the third rotating ring, and the first fan ring conductor pay-off frame, the second fan ring conductor pay-off frame, and the Z-shaped conductor pay-off frame have the same frame structure except for the wire coil;

[0024] The frame includes a base plate, a fixed vertical plate, a movable vertical plate, a pay-off motor, a shaft expander, a screw motor, a horizontal screw, a slide rail and a slider. The base plate is fixed on the corresponding swivel, a fixed vertical plate is vertically fixed to one end of the upper side of the base plate, a screw motor and a slide rail are installed on the other end of the upper side of the base plate, a slide rail is slidably supported on the slide rail, a movable vertical plate is fixed to the upper side of the slider, the output end of the screw motor is connected to the horizontal screw via a coupling, a screw groove cooperating with the horizontal screw is provided at the bottom of the movable vertical plate, a shaft expander for supporting the corresponding wire coil is movably installed on the inner sides of the fixed vertical plate and the movable vertical plate, and a pay-off motor for driving the shaft expander thereon to rotate is installed on the outer side of the fixed vertical plate.

[0025] Furthermore, in the above-mentioned compression molding system, the outer edge of the first pay-off drum is fixed to the upper side of the first rotating ring by a plurality of straightening frames located in the inner layer; the first pay-off drum comprises a first drum body, a first die head matching with the central conductor is installed at the center of the first drum body, a first annular weight reduction cavity is provided inside the first drum body, six groups of first wire threading holes are provided circumferentially on both sides of the first annular weight reduction cavity, and six groups of first anti-deflection pay-off devices are circumferentially installed on the upper side of the first drum body; the first anti-deflection pay-off device comprises a first limiting roller A and a first limiting roller B, a first limiting wire guide hole matching with the cross-sectional shape of the first fan ring conductor is formed between the first limiting roller A and the first limiting roller B;

[0026] The outer edge of the second pay-off drum is fixed to the upper side of the second rotating ring through a plurality of straightening frames located in the middle layer; the second pay-off drum comprises a second drum body, a second die head matched with the first ring body is installed at the center of the second drum body, a second annular weight reduction cavity is provided inside the second drum body, 10 groups of second wire threading holes are provided circumferentially on both sides of the second annular weight reduction cavity of the second drum body, and 10 groups of second anti-deflection pay-off devices are circumferentially installed on the upper side of the second drum body; the second anti-deflection pay-off device comprises a second limiting roller A and a second limiting roller B, and a second limiting wire guide hole matched with the cross-sectional shape of the second fan ring conductor is formed between the second limiting roller A and the second limiting roller B;

[0027] The outer edge of the third pay-off drum is fixed to the upper side of the third swivel ring by a plurality of straightening frames located on the outer layer; the third pay-off drum comprises a third drum body, a third die head matched with the second ring body is installed at the center of the third drum body, a third annular weight reduction cavity is provided inside the third drum body, 24 groups of third wire threading holes are provided circumferentially on both sides of the third annular weight reduction cavity, and 24 groups of third anti-deflection pay-off devices are circumferentially installed on the upper side of the third drum body; the third anti-deflection pay-off device comprises a third limiting roller A and a third limiting roller B, a third limiting wire guide hole matched with the cross-sectional shape of the Z-shaped conductor is formed between the third limiting roller A and the third limiting roller B.

[0028] Furthermore, in the above-mentioned compression molding system, the water-blocking glue spraying assembly includes a water-blocking glue box, a glue supply hose and a spraying die head, and the output end of the water-blocking glue box is connected to the spraying die head via the glue supply hose; the spraying die head is provided with a first die hole, one end of the first die hole is a first inlet port for facilitating the passage of the tight core body, and the other end of the first die hole is a first outlet port for the passage of the tight core body coated with the water-blocking glue.

[0029] Furthermore, in the above-mentioned compression molding system, the sheath extrusion molding assembly includes an extruder and an extrusion die installed at its output end, the extrusion die is provided with a second die hole, one end of the second die hole is a second inlet for facilitating the passage of a tight core body with a water-blocking insulating layer formed on the surface, and the other end of the second die hole is a second outlet for the passage of a tight core body coated with a sheath and a water-blocking insulating layer.

[0030] The beneficial effects of the present invention are:

[0031] 1. The compressed conductor cable provided by the present invention is obtained by twisting a central conductor, a first fan-ring conductor, a second fan-ring conductor and a Z-shaped conductor to obtain a compact core, and then forming a water-blocking insulation layer and a sheath on the outside of the compact core. Among them, the first fan-ring conductor is closest to the central conductor, and its central angle range is the largest, and the length ratio of the short arc to the long arc is the largest. The central angle range of the second fan-ring conductor and the Z-shaped conductor and the length ratio range of the short arc to the long arc are successively reduced, and the number of conductors is successively increased, so that the central conductor, the first fan-ring conductor, the second fan-ring conductor and the Z-shaped conductor can be tightly fitted in turn. By designing a Z-shaped conductor to replace the third fan-ring conductor, the degree of compression of the outer layer can be reduced on the basis of ensuring that the inner layer gap of the cable is small, so that the tensile strength and elongation of the copper wire in the compressed conductor after compression and deformation will not decrease significantly, and the tensile strength and toughness of the cable are guaranteed. At the same time, the spiral outer surface groove brought by the rounded corners in the Z-shaped conductor is used to "anchor" and install the water-blocking insulation layer, so that the advantages of the compressed conductor cable profile can be brought into play on the submarine cable with water-blocking requirements. In addition, when used as a submarine cable, an armor structure can be added to the outside of the sheath as needed.

[0032] 2. The compression molding system provided by the present invention is designed with an integrated vertical twisting device. On the one hand, it occupies a small volume and supports the horizontal rotation of the first fan-ring conductor pay-off frame, the second fan-ring conductor pay-off frame, and the Z-shaped conductor pay-off frame. Compared with the vertical rotation pay-off, it has the advantage of high stability, avoiding the occurrence of the breakage of the special-shaped conductor monomer due to the deserted island. The frame design of the first fan-ring conductor pay-off frame, the second fan-ring conductor pay-off frame, and the Z-shaped conductor pay-off frame is reasonable, which is convenient for rapid reel change. On the other hand, the first fan-ring conductor pay-off frame, the second fan-ring conductor pay-off frame, and the Z-shaped conductor pay-off frame are sequentially provided with the first pay-off reel, the second pay-off reel, and the third pay-off reel. The first pay-off reel, the second pay-off reel, and the third pay-off reel are each provided with an anti-deflection pay-off device that matches the cross-sectional shape of the corresponding special-shaped conductor monomer. The anti-deflection pay-off device ensures that the corresponding special-shaped conductor monomer will not be deflected or misaligned before twisting, so that the special-shaped conductor monomers can be completely twisted together in sequence.

[0033] 3. In the compression molding system provided by the present invention, the threads of the twisted whole are greatly shortened, so that the subsequent glue spraying and plastic coating processes can be integrated with the compression molding process, thereby greatly improving the production efficiency of the compressed conductor cable.

[0034] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0036] Figure 1 It is a schematic diagram of the composition of the compressed conductor cable in the present invention;

[0037] Figure 2 is a schematic structural diagram of the first fan-ring conductor in the present invention;

[0038] Figure 3 is a schematic structural diagram of the second fan ring conductor in the present invention;

[0039] Figure 4 It is a schematic diagram of the structure of the Z-shaped conductor in the present invention;

[0040] Figure 5 It is a schematic diagram of the composition of the compression molding system in the present invention;

[0041] Figure 6 It is a schematic diagram of the top view of the rotary driver in the present invention;

[0042] Figure 7 It is a schematic diagram of the position of the slewing bearing in the present invention;

[0043] Figure 8 It is a schematic structural diagram of the pay-off frame body in the present invention;

[0044] Fig. 9 It is a structural schematic diagram of the first pay-off drum in the present invention;

[0045] Fig.10 It is a structural schematic diagram of the first anti-deflection pay-off device in the present invention;

[0046] Fig.11 It is a structural schematic diagram of the second pay-off drum in the present invention;

[0047] Fig.12 It is a structural schematic diagram of the second anti-deflection pay-off device in the present invention;

[0048] Fig.13 It is a structural schematic diagram of the third pay-off drum in the present invention;

[0049] Fig.14 It is a schematic structural diagram of the third anti-deflection pay-off device in the present invention;

[0050] Fig.15 It is a structural schematic diagram of the water-blocking glue spraying assembly in the present invention;

[0051] Fig.16 It is a schematic diagram of the structure of the sheath extrusion molding component in the present invention;

[0052] Fig.17 A schematic diagram of the production route of the compressed conductor cable in the present invention;

[0053] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0054] 1-compressed conductor cable, 101-center conductor, 102-first fan ring conductor, 103-second fan ring conductor, 104-Z-shaped conductor, 105-water-blocking insulation layer, 106-sheath, 2-rotation drive, 201-outer cover, 202-center tube, 203-first rotating ring, 204-second rotating ring, 205-third rotating ring, 206-rotation bearing, 3-first fan ring conductor pay-off frame, 4-second fan ring conductor pay-off frame, 5-Z-shaped conductor pay-off frame Wire rack, 501-bottom plate, 502-fixed vertical plate, 503-pay-off motor, 504-movable vertical plate, 505-screw motor, 506-horizontal screw, 507-slide rail, 508-slider, 6-righting frame, 7-first pay-off disk, 701-first disk body, 702-first die head, 703-first annular weight reduction cavity, 704-first anti-deflection pay-off device, 704a-first limit roller A, 704b-first limit roller B, 704c-first Limiting wire guide hole, 8-second pay-off disc, 801-second disc body, 802-second die head, 803-second annular weight reduction cavity, 804-second anti-deflection pay-off device, 804a-second limiting roller A, 804b-second limiting roller B, 804c-second limiting wire guide hole, 9-third pay-off disc, 901-third disc body, 902-third die head, 903-third annular weight reduction cavity, 904-third anti-deflection pay-off device, 904a-third limiting roller A , 904b-the third limiting roller B, 904c-the third limiting wire guide hole, 10-the center conductor pay-off frame, 11-the lower steering wheel, 12-the pressure-maintaining die, 13-the upper steering wheel, 14-the water-blocking glue spraying assembly, 141-the water-blocking glue box, 142-the glue supply hose, 143-the spraying die, 15-the curing and drying assembly, 16-the sheath extrusion molding assembly, 161-the extruder, 162-the extrusion die, 17-the cold water tank, 18-the compact conductor cable take-up frame. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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. Example

[0056] like Figure 1As shown, this embodiment provides a compressed conductor cable, which includes a central conductor 101, a first ring body, a second ring body, a third ring body, a water-blocking insulating layer 105 and a sheath 106; the first ring body is composed of a plurality of first fan-ring conductors 102 that are tightly fitted around the central conductor 101 along the circumferential direction; the second ring body is composed of a plurality of second fan-ring conductors 103 that are tightly fitted around the first ring body along the circumferential direction; the third ring body is composed of a plurality of Z-shaped conductors 104 that are tightly fitted around the second ring body along the circumferential direction; the water-blocking insulating layer 105 is sleeved on the outside of the third ring body; and the sheath 106 is sleeved on the outside of the water-blocking insulating layer.

[0057] like Figure 2 As shown, the central angle of the first fan-ring conductor 102 is 60°, and the length ratio of the short arc to the long arc is 1:2.4-3.

[0058] like Figure 3 As shown, the central angle of the second sector ring conductor 103 is 36°, and the length ratio of the short arc to the long arc is in the range of 1:1.4-2.

[0059] like Figure 4 As shown, the central angle of the Z-shaped conductor 104 is 20°, the central angle corresponding to the convex / concave portion at the end is 5°, and the ratio of the thickness value to the length value of the Z-shaped conductor 104 itself is in the range of 1:1.2 to 1.6; the Z-shaped conductor 104 is provided with rounded corners at each corner point, and the ratio of the diameter value of the rounded corner to the thickness value of the Z-shaped conductor 104 is in the range of 1:5.6 to 7.8.

[0060] In this embodiment, the water-blocking insulating layer 105 is formed by curing an insulating water-blocking adhesive; and the sheath 106 is a polyethylene sheath.

[0061] The compressed conductor cable 1 provided in this embodiment is obtained by twisting a central conductor 101, a first fan-ring conductor 102, a second fan-ring conductor 103 and a Z-shaped conductor 104 to obtain a compact core, and then forming a water-blocking insulating layer 105 and a sheath 106 on the outside of the compact core. Among them, the first fan-ring conductor 102 is closest to the central conductor, and its central angle range is the largest, and the length ratio of the short arc to the long arc is the largest. The central angle range of the second fan-ring conductor 103 and the Z-shaped conductor 104 and the length ratio range of the short arc to the long arc are successively reduced, and the number of conductors is successively increased, so that the central conductor 101, the first fan-ring conductor 102, the second fan-ring conductor 103 and the Z-shaped conductor 104 can be closely fitted in sequence. By designing the Z-shaped conductor 104 to replace the third fan-ring conductor, the degree of compression of the outer layer can be reduced on the basis of ensuring that the inner layer gap of the cable is small, so that the tensile strength and elongation of the copper wire in the compressed conductor after compression and deformation will not be greatly reduced, and the tensile strength and toughness of the cable are guaranteed. At the same time, the spiral outer surface grooves brought about by the rounded corners of the Z-shaped conductor 104 are used to "anchor" and install the water-blocking insulation layer 105, so that the advantages of the compact conductor cable type 1 line can be brought into play on the submarine cable with water-blocking requirements. In addition, when used as a submarine cable, an armor structure can be added to the outer side of the sheath 106 according to needs. Example

[0062] like Figure 5 As shown, this embodiment provides a compression molding system for producing the compressed conductor cable 1 in the first embodiment. The compression molding system includes an integrated vertical stranding device, a center conductor pay-off frame 10, a lower steering wheel 11, a pressure-maintaining die head 12, an upper steering wheel 13, a water-blocking glue spraying assembly 14, a curing and drying assembly 15, a sheath extrusion molding assembly 16, a cold water tank 17 and a compressed conductor cable take-up frame 18. The center conductor pay-off frame 10 is arranged below the integrated vertical stranding device. The center conductor 101 pulled out by the center conductor pay-off frame 10 passes through the integrated vertical stranding device after being turned by the lower steering wheel 11. The integrated vertical stranding device sequentially twists the first ring body, the second ring body, and the third ring body on the outside of the center conductor 101 to form a compact core body in the pressure-maintaining die head; after the compact core body is turned by the upper steering wheel 13, it is sprayed by the water-blocking glue spraying component 14 and cured by the curing and drying component 15 to form a water-blocking insulating layer 105 on the surface, and then it is coated by the sheath extrusion molding component 16 and cooled by the cold water tank 17 to form a sheath 106 on the surface, and finally the compact conductor cable 1 is rolled up by the compact conductor cable take-up frame 18.

[0063] In this embodiment, the integrated vertical stranding device includes a rotary drive 2, a first fan-ring conductor pay-off frame 3, a second fan-ring conductor pay-off frame 4, a Z-shaped conductor pay-off frame 5, a straightening frame 6, a first pay-off drum 7, a second pay-off drum 8 and a third pay-off drum 9. The first fan-ring conductor pay-off frame 3, the second fan-ring conductor pay-off frame 4 and the Z-shaped conductor pay-off frame 5 are installed on the upper side of the rotary drive 2 from inside to outside in a circular array. The upper side of the rotary drive 2 supports the first pay-off drum 7, the second pay-off drum 8 and the third pay-off drum 9 from low to high through the straightening frame 6. The first pay-off drum 7, the second pay-off drum 8 and the third pay-off drum 9 are coaxially distributed and the outer diameters gradually increase. The first fan-ring conductor pay-off frame 3 and the first pay-off drum 7 rotate synchronously around the central axis of the rotary drive 2, the second fan-ring conductor pay-off frame 4 and the second pay-off drum 8 rotate synchronously around the central axis of the rotary drive, and the Z-shaped conductor pay-off frame 5 and the third pay-off drum 9 rotate synchronously around the central axis of the rotary drive.

[0064] like Figure 6 and Figure 7 As shown, the slewing drive 2 includes an outer cover 201, a central through tube 202, a first swivel ring 203, a second swivel ring 204, a third swivel ring 205 and a slewing bearing 206. The central through tube 202 is fixedly installed at the center of the outer cover 201. The outer cover 201 is located on the periphery of the central through tube 202 and is provided with the first swivel ring 203, the second swivel ring 204 and the third swivel ring 205 in sequence from the inside to the outside. The first swivel ring 203, the second swivel ring 204 and the third swivel ring 205 are respectively installed at the lower side of a slewing bearing for driving them to rotate.

[0065] In this embodiment, the first fan-ring conductor pay-off frame 3, the second fan-ring conductor pay-off frame 4, and the Z-shaped conductor pay-off frame 5 are respectively installed on the first rotating ring 203, the second rotating ring 204, and the third rotating ring 205. There are 6 first fan-ring conductor pay-off frames 3, 10 second fan-ring conductor pay-off frames 4, and 24 Z-shaped conductor pay-off frames 5. The frame structures of the first fan-ring conductor pay-off frame 3, the second fan-ring conductor pay-off frame 4, and the Z-shaped conductor pay-off frame 5 are the same except for the wire coil.

[0066] like Figure 8As shown, the frame includes a base plate 501, a fixed vertical plate 502, a movable vertical plate 504, a pay-off motor 503, an expander, a screw motor 505, a horizontal screw 506, a slide rail 507 and a slider 508. The base plate 501 is fixed to the corresponding swivel along the radial direction of the outer cover 201, and the fixed vertical plate 502 is vertically fixed to one end of the upper side of the base plate 501. The screw motor 505 and the slide rail 507 are installed at the other end of the upper side of the base plate 501. The slider 508 is slidably supported on the slide rail 507, and the movable base plate 504 is fixed to the upper side of the slider 508. The output end of the screw motor 505 is connected to the horizontal screw 506 via a coupling, and a screw groove cooperating with the horizontal screw 506 is provided at the bottom of the movable vertical plate 504. An expander for supporting the corresponding wire coil is movably installed on the inner side of the fixed vertical plate 502 and the movable vertical plate 504 (not shown in the unsimplified drawings), and a wire-releasing motor 503 is installed on the outer side of the fixed vertical plate 502 to drive the expander thereon to rotate.

[0067] In this embodiment, the outer edge of the first pay-off drum 7 is fixed to the upper side of the first rotating ring 203 by a plurality of inner straightening frames 6; Fig. 9 As shown, the first pay-off reel 7 includes a first reel body 701, a first die head 702 matching with the central conductor 101 is installed at the center of the first reel body 701, a first annular weight-reducing cavity 703 is provided inside the first reel body 701, six groups of first threading holes are provided along the circumferential direction on both sides of the first annular weight-reducing cavity 703 of the first reel body 701, and six groups of first anti-deflection pay-off devices 704 are installed along the circumferential direction on the upper side of the first reel body 701; Fig.10 As shown, the first anti-deflection pay-off device 704 includes a first limiting roller A704a and a first limiting roller B704b, and a first limiting wire hole 704c matching the cross-sectional shape of the first fan-ring conductor 102 is formed between the first limiting roller A704a and the first limiting roller B704b.

[0068] In this embodiment, the outer edge of the second pay-off drum 8 is fixed to the upper side of the second rotating ring 204 by a plurality of straightening frames 6 located in the middle layer; Fig.11 As shown, the second pay-off reel 8 includes a second reel body 801, a second die head 802 cooperating with the first ring body is installed at the center of the second reel body 801, a second annular weight reduction cavity 803 is opened inside the second reel body 801, 10 groups of second threading holes are opened along the circumferential direction on both sides of the second annular weight reduction cavity 803 of the second reel body 801, and 10 groups of second anti-deflection pay-off devices 804 are installed along the circumferential direction on the upper side of the second reel body 801; Fig.12 As shown, the second anti-deflection pay-off device 804 includes a second limiting roller A804a and a second limiting roller B804b, and a second limiting wire hole 804c matching the cross-sectional shape of the second fan ring conductor 103 is formed between the second limiting roller A804a and the second limiting roller B804b.

[0069] In this embodiment, the outer edge of the third pay-off drum 9 is fixed to the upper side of the third rotating ring 205 by a plurality of straightening frames 6 located on the outer layer; Fig.13 As shown, the third pay-off reel 9 includes a third reel body 901, a third die head 902 cooperating with the second ring body is installed at the center of the third reel body 901, a third annular weight reduction cavity 903 is opened inside the third reel body 901, 24 groups of third threading holes are opened along the circumferential direction on both sides of the third annular weight reduction cavity 903 on the third reel body 901, and 24 groups of third anti-deflection pay-off devices 904 are installed along the circumferential direction on the upper side of the third reel body 901; Fig.14 As shown, the third anti-deflection pay-off device 904 includes a third limiting roller A904a and a third limiting roller B904b, and a third limiting wire hole 904c matching the cross-sectional shape of the Z-shaped conductor 104 is formed between the third limiting roller A904a and the third limiting roller B904b.

[0070] In this embodiment, the pressure-maintaining die head 12 cooperates with the third ring body. The mold cavity specifications of the first punching die head 702, the second punching die head 802, the third punching die head 902 and the pressure-maintaining die head 12 are adjustable, and the specific adjustment method can be achieved by using multiple screws to drive the arc-shaped modules of the circle to perform radial displacement.

[0071] like Fig.15 As shown, the water-blocking glue spraying assembly 14 includes a water-blocking glue box 141, a glue supply hose 142 and a spraying die 143. The output end of the water-blocking glue box 141 is connected to the spraying die 143 via the glue supply hose 142; the spraying die 143 is provided with a first die hole, one end of the first die hole is a first inlet for facilitating the passage of a tight core body, and the other end of the first die hole is a first outlet for the passage of a tight core body coated with water-blocking glue.

[0072] like Fig.16 As shown, the sheath extrusion molding assembly 16 includes an extruder 161 and an extrusion die 162 installed at its output end, the extrusion die 162 is provided with a second die hole, one end of the second die hole is a second inlet for facilitating the passage of a tight core body with a water-blocking insulating layer formed on the surface, and the other end of the second die hole is a second outlet for the passage of a tight core body coated with a sheath and a water-blocking insulating layer.

[0073] The route for producing a compressed conductor cable using the compression molding system provided in this embodiment is as follows: Fig.17 As shown:

[0074] (a) stage: center conductor 101;

[0075] Stage (b): twisting the first sector ring conductor 102 on the outer side of the central conductor 101 to form a first ring body;

[0076] Stage (c): twisting the second sector ring conductor 103 on the outside of the first ring body to form a second ring body;

[0077] Stage (d): twisting the Z-shaped conductor 104 on the outside of the second ring to form a third ring;

[0078] Stage (e): coating and curing the water-blocking adhesive on the third ring body to form a water-blocking insulating layer 105;

[0079] Stage (f): forming a sheath 106 on the outer side of the water-blocking insulating layer 105 to obtain a finished product.

[0080] The compacting and forming system provided in this embodiment is designed with an integrated vertical twisting device. On the one hand, it occupies a small volume and supports the horizontal rotation of the first fan-ring conductor pay-off frame 3, the second fan-ring conductor pay-off frame 4, and the Z-shaped conductor pay-off frame 5. Compared with the vertical rotation pay-off, it has the advantage of high stability, avoiding the occurrence of the breakage of the special-shaped conductor monomer due to the deserted island. The frame design of the first fan-ring conductor pay-off frame 3, the second fan-ring conductor pay-off frame 4, and the Z-shaped conductor pay-off frame 5 is reasonable, which is convenient for fast reel change. On the other hand, the first fan-ring conductor pay-off frame 3, the second fan-ring conductor pay-off frame 4, and the Z-shaped conductor pay-off frame 5 are sequentially provided with the first pay-off reel 7, the second pay-off reel 8, and the third pay-off reel 9. The first pay-off reel 7, the second pay-off reel 8, and the third pay-off reel 9 are each provided with an anti-deflection pay-off device that matches the cross-sectional shape of the corresponding special-shaped conductor monomer. The anti-deflection pay-off device ensures that the corresponding special-shaped conductor monomer will not be deflected or misaligned before twisting, so that the special-shaped conductor monomer can be completely twisted together in sequence.

[0081] In the compression molding system provided in this embodiment, the threads of the twisted whole are greatly shortened, so that the subsequent glue spraying and plastic coating processes can be integrated with the compression molding process, thereby greatly improving the production efficiency of the compressed conductor cable.

[0082] The preferred embodiments of the present invention disclosed above are only useful to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A compression molding system for producing compressed conductor cables, characterized in that: The compressed conductor cable comprises a central conductor, a first ring body, a second ring body, a third ring body, a water-blocking insulating layer and a sheath; the first ring body is composed of a plurality of first fan-ring conductors tightly fitted around the central conductor in the circumferential direction; the second ring body is composed of a plurality of second fan-ring conductors tightly fitted around the first ring body in the circumferential direction; the third ring body is composed of a plurality of Z-shaped conductors tightly fitted around the second ring body in the circumferential direction; the water-blocking insulating layer is sleeved on the outer side of the third ring body; the sheath is sleeved on the outer side of the water-blocking insulating layer; The compression molding system comprises an integrated vertical twisting device, a center conductor pay-off frame, a lower steering wheel, an upper steering wheel, a pressure-maintaining die head, a water-blocking glue spraying assembly, a curing and drying assembly, a sheath extrusion molding assembly, a cold water tank and a compressed conductor cable take-up frame, wherein the center conductor pay-off frame is arranged below the integrated vertical twisting device, and the center conductor pulled out by the center conductor pay-off frame passes through the integrated vertical twisting device after being turned by the lower steering wheel, and the integrated vertical twisting device sequentially twists the first ring body, the second ring body and the third ring body on the outer side of the center conductor to form a compact core body in the pressure-maintaining die head; after the compact core body is turned by the steering wheel, it is sprayed with glue by the water-blocking glue spraying assembly and cured by the curing and drying assembly to form a water-blocking insulating layer on the surface, and then it is coated with plastic by the sheath extrusion molding assembly and cooled by the cold water tank to form a sheath on the surface, and finally the compressed conductor cable is rolled up by the compressed conductor cable take-up frame; The integrated vertical stranding device comprises a rotary drive, a first fan-ring conductor pay-off frame, a second fan-ring conductor pay-off frame, a Z-shaped conductor pay-off frame, a straightening frame, a first pay-off drum, a second pay-off drum and a third pay-off drum, the upper side of the rotary drive is provided with the first fan-ring conductor pay-off frame, the second fan-ring conductor pay-off frame and the Z-shaped conductor pay-off frame distributed in a circular array from the inside to the outside, the upper side of the rotary drive is supported by the straightening frame from low to high respectively with the first pay-off drum, the second pay-off drum and the third pay-off drum, the first fan-ring conductor pay-off frame and the first pay-off drum rotate synchronously around the central axis of the rotary drive, the second fan-ring conductor pay-off frame and the second pay-off drum rotate synchronously around the central axis of the rotary drive, and the Z-shaped conductor pay-off frame and the third pay-off drum rotate synchronously around the central axis of the rotary drive; The slewing drive comprises an outer cover, a central through-tube, a first slewing ring, a second slewing ring, a third slewing ring and a slewing bearing. The central through-tube is fixedly installed at the center of the outer cover. The outer cover is located on the periphery of the central through-tube and is provided with a first slewing ring, a second slewing ring and a third slewing ring in sequence from the inside to the outside. The first slewing ring, the second slewing ring and the third slewing ring are respectively installed at the lower side thereof with a slewing bearing for driving the rotation thereof. The first fan ring conductor pay-off frame, the second fan ring conductor pay-off frame, and the Z-shaped conductor pay-off frame are respectively installed on the first rotating ring, the second rotating ring, and the third rotating ring. The first fan ring conductor pay-off frame, the second fan ring conductor pay-off frame, and the Z-shaped conductor pay-off frame have the same frame structure except for the wire coil; The frame includes a base plate, a fixed vertical plate, a movable vertical plate, a pay-off motor, a shaft expander, a screw motor, a horizontal screw, a slide rail and a slider. The base plate is fixed on the corresponding swivel, a fixed vertical plate is vertically fixed to one end of the upper side of the base plate, a screw motor and a slide rail are installed on the other end of the upper side of the base plate, a slide rail is slidably supported on the slide rail, a movable vertical plate is fixed to the upper side of the slider, the output end of the screw motor is connected to the horizontal screw via a coupling, a screw groove cooperating with the horizontal screw is provided at the bottom of the movable vertical plate, a shaft expander for supporting the corresponding wire coil is movably installed on the inner sides of the fixed vertical plate and the movable vertical plate, and a pay-off motor for driving the shaft expander thereon to rotate is installed on the outer side of the fixed vertical plate.

2. The compression molding system according to claim 1, characterized in that: The central angle of the first sector ring conductor is 60°, and the length ratio of the short arc to the long arc is 1:2.4-3; The central angle of the second sector ring conductor is 36°, and the length ratio of the short arc to the long arc is in the range of 1:1.4 to 2; The central angle of the Z-shaped conductor is 20°, the central angle corresponding to the convex part / concave part at the end is 5°, and the ratio of the thickness value to the length value of the Z-shaped conductor itself is in the range of 1:1.2 to 1.6; the Z-shaped conductor is provided with rounded corners at each corner point, and the ratio of the diameter value of the rounded corner to the thickness value of the Z-shaped conductor is in the range of 1:5.6 to 7.

8.

3. The compression molding system according to claim 2, characterized in that: The water-blocking insulating layer is formed by curing the insulating water-blocking glue; The sheath is a polyethylene sheath.

4. The compression molding system according to claim 3, characterized in that: The outer edge of the first pay-off drum is fixed to the upper side of the first rotating ring through a plurality of straightening frames located in the inner layer; the first pay-off drum comprises a first drum body, a first die head matching with the central conductor is installed at the center of the first drum body, a first annular weight-reducing cavity is provided inside the first drum body, six groups of first wire threading holes are provided along the circumferential direction on both sides of the first annular weight-reducing cavity, and six groups of first anti-deflection pay-off devices are installed along the circumferential direction on the upper side of the first drum body; the first anti-deflection pay-off device comprises a first limiting roller A and a first limiting roller B, a first limiting wire guide hole matching with the cross-sectional shape of the first fan ring conductor is formed between the first limiting roller A and the first limiting roller B; The outer edge of the second pay-off drum is fixed to the upper side of the second rotating ring through a plurality of straightening frames located in the middle layer; the second pay-off drum comprises a second drum body, a second die head matched with the first ring body is installed at the center of the second drum body, a second annular weight reduction cavity is provided inside the second drum body, 10 groups of second wire threading holes are provided circumferentially on both sides of the second annular weight reduction cavity of the second drum body, and 10 groups of second anti-deflection pay-off devices are circumferentially installed on the upper side of the second drum body; the second anti-deflection pay-off device comprises a second limiting roller A and a second limiting roller B, and a second limiting wire guide hole matched with the cross-sectional shape of the second fan ring conductor is formed between the second limiting roller A and the second limiting roller B; The outer edge of the third pay-off drum is fixed to the upper side of the third swivel ring by a plurality of straightening frames located on the outer layer; the third pay-off drum comprises a third drum body, a third die head matched with the second ring body is installed at the center of the third drum body, a third annular weight reduction cavity is provided inside the third drum body, 24 groups of third wire threading holes are provided circumferentially on both sides of the third annular weight reduction cavity, and 24 groups of third anti-deflection pay-off devices are circumferentially installed on the upper side of the third drum body; the third anti-deflection pay-off device comprises a third limiting roller A and a third limiting roller B, a third limiting wire guide hole matched with the cross-sectional shape of the Z-shaped conductor is formed between the third limiting roller A and the third limiting roller B.

5. The compression molding system according to claim 4, characterized in that: The water-blocking glue spraying assembly includes a water-blocking glue box, a glue supply hose and a spraying die head. The output end of the water-blocking glue box is connected to the spraying die head via the glue supply hose. The spraying die head is provided with a first die hole. One end of the first die hole is a first inlet for facilitating the passage of a tight core body, and the other end of the first die hole is a first outlet for the tight core body coated with the water-blocking glue to pass through.

6. The compression molding system according to claim 5, characterized in that: The sheath extrusion molding assembly includes an extruder and an extrusion die installed at its output end, the extrusion die is provided with a second die hole, one end of the second die hole is a second inlet for facilitating the passage of a tight core body with a water-blocking insulating layer formed on the surface, and the other end of the second die hole is a second outlet for the passage of a tight core body coated with a sheath and a water-blocking insulating layer.

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