Steel-cored aluminum stranded wire structure and stranding device for producing steel-cored aluminum stranded wire

Abstract

The application discloses a steel-cored aluminum stranded wire structure and a stranding device for producing the steel-cored aluminum stranded wire, and relates to the technical field of the steel-cored aluminum stranded wire.The steel-cored aluminum stranded wire structure comprises a steel core stranded wire layer, an inner aluminum stranded wire layer and an outer aluminum stranded wire layer arranged in sequence from inside to outside; the steel core stranded wire layer is twisted by a plurality of steel wires, and the twisting angles of the steel wires in different layers from inside to outside present a decreasing trend, so as to reduce the extrusion force of the outer layer steel wire on the inner layer steel wire and avoid plastic deformation; the inner aluminum stranded wire layer and the outer aluminum stranded wire layer are both twisted by a plurality of aluminum wires, and the twisting angles of the aluminum wires in different layers from inside to outside present an increasing trend, the inner layer low-tension reserved deformation capacity, moderate tension anti-loosening and large-angle deformation space are reserved to absorb the thermal expansion difference between the steel core and the aluminum layer; the aluminum wire twisting angle of the outer aluminum stranded wire layer is greater than that of the inner aluminum stranded wire layer, and the surface compactness is increased to block rainwater penetration.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel-cored aluminum stranded wire, in particular to a steel-cored aluminum stranded wire structure and a stranding device for producing the steel-cored aluminum stranded wire. BACKGROUND

[0002] The steel-cored aluminum stranded wire is a composite wire body composed of a high-strength steel wire as a load-bearing core and a plurality of aluminum wires as an outer layer. This structure is mainly applied to high-voltage transmission lines, urban power grids and other scenarios, and can effectively resist wind load and self-weight. The production of the steel-cored aluminum stranded wire requires a professional stranding device to ensure the accurate stranding ratio and uniformity of the steel core and the aluminum wire, thereby guaranteeing the mechanical and electrical properties of the wire body.

[0003] However, the existing steel-cored aluminum stranded wire structure and the stranding device for producing the steel-cored aluminum stranded wire still have the following problems:

[0004] 1. The existing steel-cored aluminum stranded wire structure mostly adopts a uniform stranding angle design, but in actual use, the aluminum stranded wire layer is prone to exerting excessive radial pressure on the steel core layer during stranding, leading to stress concentration and further causing plastic deformation. At the same time, there is a lack of reasonable angle transition between layers, resulting in increased friction on the wire contact surface, accelerated wear, weakened anti-loosening ability and interlayer bonding strength. In addition, the traditional structure mostly adopts a uniform direction or an inner and outer layer stranding method with one positive and one negative, which can easily cause a large relative sliding trend between the steel core layer and the adjacent aluminum layer, affecting the mechanical synergy. The latter can improve the interlayer sliding problem, but it will lead to increased frictional resistance between the wire layers, uneven stranding tension distribution, and further affect the tensile strength and wind vibration resistance.

[0005] 2. The existing wire usually lacks targeted pre-deformation processing before entering the stranding area, resulting in less than ideal tightness between the layers during stranding, affecting the synchronous forming precision between the steel core layer and the aluminum stranded wire layer, and easily causing interlayer misalignment and structural looseness. At the same time, the current solidification processing is mostly carried out after stranding, lacking a mechanism for dynamic compaction and layer-by-layer solidification of the wire during stranding, which can easily cause uneven stacking, local deformation and other phenomena, reducing the structural stability and use reliability of the wire body. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides a steel-cored aluminum stranded wire structure and a stranding device for producing the steel-cored aluminum stranded wire, which solves the problems raised in the background art.

[0007] To achieve the above object, on the one hand, the application provides a steel-cored aluminum stranded wire structure, comprising a steel core stranded wire layer, an inner aluminum stranded wire layer and an outer aluminum stranded wire layer arranged in sequence from inside to outside, the steel core stranded wire layer is used for bearing main tension in axial stiffness, the inner aluminum stranded wire layer is used for balancing torsional stiffness and radial elasticity, buffering interlayer stress, the outer aluminum stranded wire layer is used for enhancing surface compactness and resisting external impact; the steel core stranded wire layer is stranded by a plurality of steel wires, and the stranding angles of the steel wires in different layers from inside to outside present a decreasing trend, so as to reduce the extrusion force of the outer layer steel wire on the inner layer steel wire and avoid plastic deformation; the inner aluminum stranded wire layer and the outer aluminum stranded wire layer are both stranded by a plurality of aluminum wires, and the stranding angles of the aluminum wires in different layers from inside to outside present an increasing trend, the inner layer low tension retains deformation capacity, moderate tension prevents loosening, and a large angle deformation space is reserved to absorb the thermal expansion difference between the steel core and the aluminum layer; the stranding angle of the aluminum wire of the outer aluminum stranded wire layer is greater than that of the inner aluminum stranded wire layer, and the surface compactness is increased to block rainwater penetration.

[0008] Further, the stranding angles of the steel wires in the steel core stranded wire layer are 17° and 15° in sequence from inside to outside, the stranding angles of the aluminum wires in the inner aluminum stranded wire layer are 24°, 26° and 28° in sequence from inside to outside, and the stranding angle of the aluminum wire in the outer aluminum stranded wire layer is 30°, the stranding angles of the layers change continuously according to the layer sequence, and the overall mechanical properties of the wire body are adapted.

[0009] Further, the steel core stranded wire layer and the inner aluminum stranded wire layer are stranded in the same stranding direction to reduce the relative sliding between the steel core layer and the adjacent aluminum layer, improve the tensile strength and wind vibration resistance of the overall wire body, the stranding directions of the outer aluminum stranded wire layer and the inner aluminum stranded wire layer are opposite, the effective area of the aluminum layer surface is increased by reverse stranding, corona loss is reduced, and eddy current concentration is inhibited.

[0010] In another aspect, the present application also provides a stranding device for producing a steel-cored aluminum stranded wire, which is suitable for the above-mentioned steel-cored aluminum stranded wire structure, comprising: a stranding disc, which is in a stepped structure, and has a rotating ring rotatably sleeved on the outer side thereof, the stranding disc and the rotating ring rotate synchronously and in opposite directions, each step surface of the stranding disc is provided with uniformly distributed through holes in the circumferential direction for penetrating the wires in the steel-cored wire layer and the inner aluminum wire layer, and the rotating ring is provided with through holes adapted to the wires in the outer aluminum wire layer; a pre-deformation assembly, which is arranged on the right side of the stranding disc and corresponds to the steel wires and aluminum wires, wherein for the steel wires, the angle between each pre-deformation assembly and the center axis of the stranding disc gradually decreases from left to right, and for the aluminum wires, the angle between each pre-deformation assembly and the center axis of the stranding disc gradually increases from left to right, so as to pre-deform the wires before stranding to make them more suitable for the subsequent stranding form; a solidifying assembly, which is arranged between adjacent wires and can rotate synchronously with the wires during stranding, so as to rotate and press each layer of wires during stranding and forming, and the pressing force gradually increases from inside to outside along the number of stranding layers. Further, the pre-deformation assembly comprises a plurality of uniformly distributed rotating rollers, the rotating rollers are rotatably installed on the same support frame, the wires pass through the gaps between the rotating rollers in sequence, and the support frames at different positions are arranged in different inclined states according to the stranding angle of the wires; the lower side of the rotating roller is provided with two left and right distributed forming turntables, the forming turntables are in petal shape, and are complementary matched when rotating relative to each other, and the outer periphery of the forming turntable is provided with a forming groove for accommodating the wires.

[0011] Further, the rear sides of the left and right forming turntables are respectively provided with rotating gears, the rotating gears on the left and right sides are meshed with each other, and the rear ends of the rotating rollers located at the lowermost position and one of the rotating gears are respectively provided with pulleys, and the pulleys are connected through a belt transmission.

[0012] Further, the solidifying assembly comprises a rotating sleeve, the rotating sleeve is sleeved on the outer side of the corresponding wire and is coaxially arranged with the wire, the support frames in the same pre-deformation assembly are fixedly installed on the corresponding rotating sleeves, the rotating sleeves corresponding to the steel-cored wire layer and the inner aluminum wire layer are fixedly connected with the stranding disc through a connecting frame, and the rotating sleeve corresponding to the outer aluminum wire layer is fixedly connected with the rotating ring through a connecting frame, so that the wires in each layer are synchronously pre-deformed and solidified during stranding.

[0013] Further, the solid component further comprises a supporting sleeve arranged inside the rotating sleeve, the inner side of the supporting sleeve is slidingly mounted with uniformly distributed pressing blocks along the radial direction thereof, the supporting spring is connected between the pressing block and the outer wall of the supporting sleeve, the side of the pressing block facing the inner wall of the rotating sleeve is provided with a matching column, and the inner side of the rotating sleeve is provided with a sliding groove slidingly matched with the matching column, so that the pressing block can adaptively slide along the sliding groove during the rotation of the rotating sleeve, thereby uniformly applying radial pressure to the stranded wire and realizing dynamic solidification; the side of the pressing block close to the axis of the supporting sleeve is rollingly mounted with uniformly distributed rolling balls, and the rolling balls are in rolling contact with the outer surface of the wire.

[0014] Further, the left and right sides of the through hole are rotationally provided with rotating rollers, the outer side of the rotating roller is provided with a limiting roller, the limiting roller is rotationally mounted between two arc-shaped blocks through a rotating shaft, the arc-shaped blocks are slidingly matched with the arc-shaped grooves provided on the arc-shaped plates, the arc-shaped plates are fixedly connected with the corresponding stranding discs and rotating rings, and the connecting spring is connected between the groove wall of the arc-shaped block and the arc-shaped groove.

[0015] Further, the left side of the stranding disc is provided with a pay-off disc fixedly connected therewith, the outer side of the pay-off disc is sleeved with an outer ring fixedly connected with the rotating ring, the pay-off disc and the outer ring are coaxially rotationally mounted on the same fixed table, the outer side of the pay-off disc is fixedly sleeved with an outer gear ring, the inner side of the outer ring is fixedly sleeved with an inner gear ring, the transmission gear is engaged between the inner gear ring and the outer gear ring, the transmission gear is rotationally mounted on the fixed table, and the driving motor is mounted on the fixed table and is fixedly connected with the center part of the pay-off disc.

[0016] The present application has the following beneficial effects:

[0017] (1) The steel-cored aluminum stranded wire structure sequentially comprises a steel core stranded wire layer, an inner aluminum stranded wire layer and an outer aluminum stranded wire layer from inside to outside, realizes function layering and structure optimization cooperation, effectively improves the overall performance of the wire body, the steel core stranded wire layer adopts a decreasing stranding angle from inside to outside, reduces the radial pressure of the outer layer steel wire on the inner layer, avoids plastic deformation caused by stress concentration, and improves the stability and long-term use reliability of the steel core structure; the inner aluminum stranded wire layer adopts an increasing stranding angle from inside to outside, so that the inner layer aluminum wire remains in a low tension state, prevents loosening, and absorbs thermal stress between the steel and aluminum layers through a reserved deformation space, thereby reducing interlayer wear; the outer aluminum stranded wire layer adopts a larger stranding angle, enhances the compactness of the outer layer, effectively improves the wind and rain erosion resistance, wear resistance and resistance to external impact, simultaneously blocks rainwater penetration, and prolongs the service life of the wire body.

[0018] (2), the steel core aluminum stranded wire structure, the steel core stranded wire layer and the inner aluminum stranded wire layer are twisted with the same twisting direction, which is beneficial to reduce the relative sliding between the two, improve the mechanical synergy of the whole line body, enhance the tensile strength and wind vibration resistance, and the outer aluminum stranded wire layer and the inner aluminum stranded wire layer are twisted in opposite directions, which increases the effective surface area of the outer aluminum wire layer through reverse twisting, helps to reduce the corona loss, at the same time, suppresses the eddy current concentration, improves the electromagnetic performance of the line body, and improves the operation stability in high voltage transmission environment.

[0019] (3), the stranding device for producing the steel core aluminum stranded wire, by setting the pre-deformation assembly corresponding to each layer of wire, the angle adaptation pre-deformation treatment of different layers of wire before entering the stranding area is carried out, the directional bending and angle pre-adjustment of the wire are realized, the preliminary angle adaptation and shape adjustment of the wire are completed before entering the stranding process, so that the subsequent stranding form is more suitable, the stranding density and structural consistency are improved, the stranding loose or interlayer misplacement caused by angle deviation is avoided, in addition, the pre-deformation assembly also has the function of guiding and supporting the wire, which can effectively prevent the wire from deviating or shaking in the conveying process, ensure that the wire maintains stable posture when entering the stranding area, and further improve the continuity of the stranding process and the quality stability of the finished wire.

[0020] (4), the stranding device for producing the steel core aluminum stranded wire, the wire has a certain elastic expansion space during pre-deformation, that is, the deformed wire is not in a tight state, and it can gradually move to the rotating sleeve in a shaped state, one end of the wire is clamped by two shaped turntables, and the other end is pressed by a pressing block, so that the segment maintains the curved state after shaping and enters the rotating sleeve to be wound, improving the continuity of the stranding process and the quality stability of the finished wire.

[0021] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the steel core aluminum stranded wire structure of the present application;

[0023] Figure 2 It is a schematic diagram of the overall structure of the stranding device for producing the steel core aluminum stranded wire of the present application;

[0024] Figure 3 It is a schematic diagram of the structure of the inner tooth ring, transmission gear and outer tooth ring in the present application;

[0025] Figure 4 It is a partial cross-sectional structure schematic diagram of the pay-off disc and the outer ring in the present application;

[0026] Figure 5 It is a left view structure schematic diagram of the stranding disc and the rotating ring in the present application;

[0027] Figure 6 Structure diagram of the twisting disc and the supporting ring in the application;

[0028] Figure 7 Structure diagram of the twisting disc and the rotating roller in the application;

[0029] Figure 8 Structure diagram of the Figure 7 Enlarged diagram of the A area in the application;

[0030] Figure 9 Structure diagram of the pre-deformation assembly and the solid assembly in the application;

[0031] Figure 10 Structure diagram of the rotating gear, the pulley and the belt in the application;

[0032] Figure 11 Structure diagram of the solid assembly in the application;

[0033] Figure 12 Structure diagram of the rotating sleeve in the application;

[0034] Figure 13 Structure diagram of the rotating sleeve in the application;

[0035] Figure 14 Structure diagram of the rotating sleeve, the supporting sleeve and the sliding block in the application.

[0036] In the figure, 1, steel core strand layer; 2, inner aluminum strand layer; 3, outer aluminum strand layer; 4, winding device; 5, twisting disc; 51, through hole; 511, rotating roller; 512, limiting roller; 513, arc block; 514, arc plate; 515, arc groove; 516, connecting spring; 52, rotating ring; 53, pre-deformation assembly; 531, rotating roller; 532, supporting frame; 533, shaped rotating disc; 534, rotating gear; 535, pulley; 536, belt; 54, solid assembly; 541, rotating sleeve; 542, connecting frame; 543, supporting ring; 544, supporting sleeve; 545, pressing block; 546, supporting spring; 547, matching column; 548, sliding groove; 549, ball; 6, pay-off disc; 61, outer ring; 611, connecting shaft; 612, outer tooth ring; 613, inner tooth ring; 614, transmission gear; 615, driving motor; 7, fixed table. DETAILED DESCRIPTION

[0037] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0038] In the description of the present application, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery" and the like indicate the orientation or positional relationship, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the referred components or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0039] The following is based on Figures 1-14 The embodiments of the present application provide a steel-cored aluminum stranded wire structure and a stranding device for producing the steel-cored aluminum stranded wire.

[0040] In one aspect, the present application provides a steel-cored aluminum stranded wire structure.

[0041] As Figure 1 shown, the steel-cored aluminum stranded wire structure comprises a steel core stranded wire layer 1, an inner aluminum stranded wire layer 2 and an outer aluminum stranded wire layer 3 arranged in sequence from inside to outside, and the three-layer structure cooperates to bear the main tension, buffer stress and resist the influence of external environment.

[0042] The steel core stranded wire layer 1 is twisted by a plurality of steel wires, serving as the load-bearing main body of the whole wire body, mainly bearing the axial tension, providing high tensile strength and axial stiffness. At the same time, the steel core stranded wire layer 1 adopts a multi-layer structure design, and the twisting angles from inside to outside are 17°, 15°, showing a gradually decreasing trend. By gradually reducing the twisting angle layer by layer, the radial pressure of the outer steel wire on the inner steel wire in the twisting process tends to be more uniform, avoiding plastic deformation of the inner steel wire due to local stress concentration, thereby improving the stability and long-term reliability of the steel core structure.

[0043] The inner aluminum strand layer 2 is arranged outside the steel core strand layer 1 and is twisted by a plurality of aluminum wires, is used for playing a role of connecting upper and lower layers in the wire body structure, the inner aluminum strand layer 2 not only bears part of the electric conduction function, but also balances the torsional stiffness and the radial elasticity of the wire body through the twisted structure, plays a role of buffering the stress between the steel core and the outer aluminum layer, the twisted angles of the layer are 24°, 26° and 28° from inside to outside in turn, and the twisted angles increase gradually, through the angle change from small to large, the inner layer aluminum wire keeps a low tension, a certain deformation capacity is reserved, loosening caused by excessive tension in the manufacturing or use process is prevented, meanwhile, the outer layer aluminum wire adopts a larger twisted angle, a sufficient deformation space is reserved, thermal stress generated between the steel core strand layer 1 and the inner aluminum strand layer 2 due to the difference in the thermal expansion coefficient is absorbed, the wear between the wires is reduced, and therefore the structural stability of the wire body in different temperature environments is improved.

[0044] The outer aluminum strand layer 3 is arranged at the outermost side and is twisted by a plurality of aluminum wires, mainly plays a role of enhancing the compactness of the surface of the wire body, improves the wind and rain erosion resistance and the surface wear resistance of the wire body, the twisted angle of the aluminum wire of the layer is 30°, is greater than the twisted angles of the inner aluminum strand layer 2, further improves the compactness of the outer layer structure, effectively prevents rainwater from penetrating, prevents the internal structure from being corroded due to damp, prolongs the service life of the wire body, and can also improve the resistance of the surface of the wire body to external mechanical impact.

[0045] In addition, the steel core strand layer 1 and the inner aluminum strand layer 2 are twisted in the same twisting direction, are beneficial to reducing the relative sliding between the two, improving the mechanical synergy of the whole wire body, enhancing the tensile strength and the wind vibration resistance, and the outer aluminum strand layer 3 and the inner aluminum strand layer 2 are twisted in opposite directions, the effective surface area of the outer layer of the aluminum wire is increased through reverse twisting, is helpful to reducing the corona loss, simultaneously inhibiting the eddy current concentration, improving the electromagnetic performance of the wire body, and improving the operation stability of the wire body in the high-voltage power transmission environment.

[0046] On the other hand, the application also provides a stranding device for producing the steel core aluminum stranded wire, is suitable for the structure of the steel core aluminum stranded wire, Figures 2-8 , including a stranding disc 5, the stranding disc 5 is in a stepped structure as a whole, a plurality of stepped surfaces are sequentially arranged from left to right, a plurality of through holes 51 uniformly distributed in the circumferential direction are arranged on each stepped surface of the stranding disc 5, so as to adapt to the twisting path of the plurality of layers of wires, are used for guiding the wires of the steel core strand layer 1 and the inner aluminum strand layer 2 to pass, ensure that the wires are arranged in order and the twisted angle is accurate in the twisting process, and avoid that the structure is loose or the twisting is uneven due to the wire deviation.

[0047] And, the outer side of the twisting disc 5 is rotatably sleeved with a rotating ring 52, the rotating ring 52 rotates synchronously with the twisting disc 5 but in the opposite direction, so as to realize the reverse twisting of different layers of wires, and the rotating ring 52 is correspondingly provided with a through hole 51 matched with the wires of the outer aluminum stranded wire layer 3, for guiding the wires to complete the twisting in the reverse rotating state, through the synchronous reverse rotation of the twisting disc 5 and the rotating ring 52, the steel core stranded wire layer 1 and the inner aluminum stranded wire layer 2 are twisted in the same direction, and the outer aluminum stranded wire layer 3 is twisted in the opposite direction, so as to effectively balance the overall torque of the wire body, reduce the residual stress generated in the twisting process, and improve the stability and the twisting density of the wire body structure.

[0048] As shown in Figure 5 and Figure 8 In order to avoid the friction damage of the wires caused by direct contact with the through hole 51 during the threading process, rotating rollers 511 are rotatably arranged on the left and right sides of the through hole 51, the rotating rollers 511 are fixedly connected with the corresponding twisting disc 5 or rotating ring 52 through a mounting frame, and when the wires pass through the through hole 51, the rotating rollers 511 can form rolling contact with the wires, the rotating rollers 511 can not only effectively support the wires, but also guide the wires during the conveying process, reduce the friction resistance, avoid scratching the surface of the wires, and further limit the wires and straighten the wires by limiting rollers 512 arranged outside the rotating rollers 511, the wires are threaded between the limiting rollers 512 and the rotating rollers 511, and the limiting rollers 512 can apply a moderate pressing force to the wires to prevent the wires from deviating or bending before twisting.

[0049] The limiting rollers 512 are rotatably installed between two arc blocks 513 through a rotating shaft, the arc blocks 513 are slidingly fitted in the arc-shaped grooves 515 opened on the arc-shaped plates 514, the arc-shaped plates 514 are fixedly connected with the corresponding twisting disc 5 or rotating ring 52, the arc blocks 513 can slide along the arc-shaped path in the arc-shaped grooves 515, so as to drive the limiting rollers 512 to move towards the rotating rollers 511, and the connecting springs 516 are arranged between the arc blocks 513 and the groove walls of the arc-shaped grooves 515, the elastic force of the connecting springs 516 makes the limiting rollers 512 always adhere to the outer side of the rotating rollers 511, so that the limiting rollers 512 can be self-adaptively adjusted according to the running state of the wires, especially suitable for the case that the wires slightly shake during the conveying process, so as to realize the dynamic limiting and stable conveying of the wires.

[0050] As shown in Figure 2As shown, a pay-off reel 6 is fixedly connected to the left side of the stranding reel 5. The pay-off reel 6 is used to carry and release the steel wire and aluminum wire used for stranding. Multiple pay-off drums are evenly distributed around the circumference of the pay-off reel 6. Each pay-off drum is rotatably mounted on the pay-off reel 6 and is used to store different types and specifications of wires respectively, ensuring that the wires maintain a good release state during the conveying process. At the same time, the pay-off reel 6 and the stranding reel 5 rotate synchronously to ensure that the angle of the wires is consistent during the conveying and stranding process, and to avoid wire deviation or uneven tension due to asynchronous rotation. An outer ring 61 is sleeved on the outside of the pay-off reel 6. The outer ring 61 is also equipped with pay-off drums evenly distributed around the circumference. The outer ring 61 is fixedly connected to the rotating ring 52 and is used to drive the reverse stranding of the outer aluminum layer wires to realize the synchronous reverse stranding of multi-layer wires.

[0051] It should be noted that a tensioning device is provided between the pay-off reel 6 and the stranding reel 5. This tensioning device is a wire tension adjustment structure in the prior art, used to apply stable tension to the wire during the wire conveying process to prevent the wire from becoming loose or overstretched during stranding, thereby ensuring the compactness and consistency of the stranded structure. A conveying roller group is also provided to stably transmit the wire, ensuring that the wire enters the stranding area at a constant speed, avoiding the impact of unstable wire operation on the stranding quality. The tensioning device and the conveying roller group work together to maintain the smooth operation of the wire throughout the stranding process. The specific structure of the tensioning device and the conveying roller group is not shown in the figure.

[0052] like Figures 2-4 As shown, to achieve synchronous counter-rotation between the stranding disc 5 and the rotating ring 52, the pay-off disc 6 and the outer ring 61 are coaxially mounted on the same fixed platform 7. The pay-off disc 6 and the outer ring 61 are respectively fixedly connected to the corresponding stranding disc 5 and rotating ring 52 via connecting shafts 611, so that the rotational motion of the pay-off disc 6 can be synchronously transmitted to the stranding disc 5, and the rotational motion of the outer ring 61 can be synchronously transmitted to the rotating ring 52. An external toothed ring 612 is fixedly fitted on the outer side of the pay-off disc 6, and an internal toothed ring 613 is fixedly fitted on the inner side of the outer ring 61. A transmission gear 614 meshes between the internal toothed ring 613 and the external toothed ring 612. The transmission gear 614 is rotatably mounted on the fixed platform 7. The winding disc 5 and the rotating ring 52 are used to achieve synchronous and opposite rotation. The winding disc 5 is stably rotatably connected above the fixed platform 7. The fixed platform 7 is equipped with a drive motor 615, whose output shaft is fixedly connected to the center of the pay-off disc 6. During operation, the drive motor 615 drives the pay-off disc 6 to rotate. The pay-off disc 6 drives the transmission gear 614 to rotate through the outer gear ring 612. The transmission gear 614 then drives the outer ring 61 to rotate in the opposite direction through meshing with the inner gear ring 613. Thus, under the linkage action of the connecting shaft 611, the winding disc 5 and the rotating ring 52 achieve synchronous and opposite rotational motion, and the winding disc 5 is stably rotatably connected above the fixed platform 7.

[0053] likeFigure 9 As shown, a pre-deformation component 53 is also provided on the right side of the stranding disc 5. This pre-deformation component 53 is set before the wire enters the stranding area and is used to perform angle adaptation pre-deformation treatment on the wire before stranding, so that it fits the subsequent stranding shape better, thereby improving the stranding density and structural consistency. At the same time, the pre-deformation component 53 also plays a guiding and supporting role for the wire, ensuring that the wire maintains a stable posture when entering the stranding area. The pre-deformation component 53 corresponds one-to-one with each layer of steel wire and aluminum wire, and performs directional pre-deformation for wires of different layers. Among them, for steel wires, the angle between each pre-deformation component 53 set from left to right and the central axis of the stranding disc 5 ( Figure 9 The obtuse angles (in the image) gradually decrease; while for aluminum wire, the angles between each pre-deformation component 53 and the central axis from left to right (in the image) gradually decrease. Figure 9 The obtuse angles in the stranding gradually increase to match the changes in stranding angles required by each layer of wire during the stranding process.

[0054] like Figure 7 , Figure 9 and Figure 10 As shown, specifically, each pre-deformation component 53 includes multiple rotating rollers 531 evenly distributed along the circumference. The rotating rollers 531 are rotatably mounted on the same support frame 532 via a rotating shaft. The wire passes through the gap formed between each rotating roller 531 in sequence. The support frame 532 at different positions is set to different tilt states according to the twisting angle of the corresponding wire, thereby achieving tensioning and guiding of the wire.

[0055] Furthermore, two forming discs 533 are arranged on the left and right sides below the rotating roller 531. The forming discs 533 are petal-shaped (with regular protrusions and concave structures on the outer contour). When they rotate relative to each other, they mesh and form a complementary fit. The outer periphery of the forming discs 533 is provided with forming grooves for accommodating the wire. The two forming discs 533 rotate synchronously towards each other during operation. Their rotation directions are opposite, but their linear speed is consistent with the wire's travel speed, ensuring that the wire passes smoothly without being pulled or piled up. When the wire passes through the rotating rollers 531 and descends to the area of ​​the forming discs 533, it enters the gap between the two forming discs 533 and is embedded in the corresponding forming groove. As the forming discs 533 continue to rotate, the wire is periodically bent under the guidance of the forming groove, forming a regular wave or bent pre-deformation structure, achieving initial shaping that is beneficial to subsequent stranding.

[0056] To achieve the aforementioned synchronous movement, rotating gears 534 are respectively installed on the rear side of the left and right forming turntables 533. The rotating gears 534 on the left and right sides mesh with each other to ensure that the forming turntables 533 on both sides can rotate precisely at the same speed but in opposite directions. The rear end of the bottom rotating roller 531 and the right side ( Figure 10The rear end of each rotating gear 534 is provided with a pulley 535, and the pulleys 535 are connected by a belt 536. The corresponding rotating gear 534 and the pulley 535 are rotatably arranged on the same support frame 532. The power is provided by the rotating roller 531 at the lowermost position, which is a power transmission roller with an internal motor, and can actively rotate to drive the wire forward.

[0057] In operation, the rotating roller 531 actively rotates to drive the wire forward. The pulley 535 at the rear end of the rotating roller 531 rotates and transmits power to the pulley 535 at the other end through the belt 536. The pulley 535 at the other end is coaxially connected with the left rotating gear 534, thereby driving the left rotating gear 534 to rotate synchronously. Since the left and right rotating gears 534 are meshed with each other, the right rotating gear 534 and the corresponding forming turntable 533 rotate in the opposite direction synchronously under the transmission action.

[0058] As shown in Figure 6 , Figure 9 and Figure 11 , a solid component 54 is further arranged between adjacent wires. The solid component 54 can rotate synchronously with the wires during the stranding process, and is used to rotate and press each layer of wires layer by layer during the stranding and forming process. The pressing force gradually increases from the inside to the outside along the stranding layers, thereby improving the compactness and geometric consistency of the stranding structure. The rotating sleeve 541 is arranged on the outside of the corresponding wire and is coaxially arranged with the wire to ensure that uniform radial pressure is applied to the wire during rotation. The support frame 532 in the same pre-deformation component 53 is fixedly installed on the corresponding rotating sleeve 541, so that the pre-deformation and solidification processes are cooperatively completed in the same rotating unit.

[0059] The rotating sleeve 541 corresponding to the steel core strand layer 1 and the inner aluminum strand layer 2 is fixedly connected with the stranding disc 5 through the connecting frame 542 and rotates synchronously with the stranding disc 5. The rotating sleeve 541 corresponding to the outer aluminum strand layer 3 is fixedly connected with the rotating ring 52 through the connecting frame 542 and rotates in the opposite direction. The connecting frame 542 is provided with an avoiding through slot for avoiding the corresponding wire. In order to ensure the running stability of the rightmost rotating sleeve 541 and the pre-deformation component 53 connected thereto during operation, a support ring 543 fixedly connected with the rotating ring 52 is fixedly arranged on the outside of the rotating sleeve 541. The support ring 543 is rotatably arranged above the fixed table 7.

[0060] As shown in Figure 9 and Figures 11-14As shown, the solidifying assembly 54 further comprises a supporting sleeve 544 arranged inside the rotating sleeve 541, through which the twisted wire can pass, the side wall of the supporting sleeve 544 is slidingly installed along the radial direction thereof and is uniformly provided with pressing blocks 545, the pressing blocks 545 are connected with the outer wall of the supporting sleeve 544 through supporting springs 546, the pressing blocks 545 can move along the radial direction of the supporting sleeve 544 under the action of the supporting springs 546 and apply a moderate radial pre-pressing force to the wire layer during the twisting process, the side of the pressing blocks 545 facing the inner wall of the rotating sleeve 541 is provided with a matching column 547, and the inner side of the rotating sleeve 541 is provided with a sliding groove 548 which slidingly matches the matching column 547. The pressing blocks 545 are in advance abutted against the wire layer under the action of the supporting springs 546, so as to be solidified, and the pressing blocks 545 and the wire layer have a certain friction force. When the rotating sleeve 541 rotates, the inner wall of the rectangular sliding groove 548 gradually extrudes the matching column 547, and drives the pressing blocks 545 and the supporting sleeve 544 to rotate synchronously, so that the solidifying process is dynamically consistent with the twisting action.

[0061] It should be noted that the wire has a certain elastic expansion space during passing through the pre-deformation assembly 53, that is, the wire at this position is not in a tight state, and it can gradually move into the rotating sleeve 541 in a shaped state, one end of the wire at this position is clamped by the two shaping turntables 533, and the other end is pressed by the pressing blocks 545, so that the segment remains in a curved state after shaping and enters the rotating sleeve 541 inside for winding. This structure realizes dynamic solidification processing of the twisted wire, can timely and stably spin cover the wire shaped by the pre-deformation assembly 53 to the outer layer of the twisted core, so that the deformed wire is accurately guided and closely fitted when entering the twisting point, effectively improving the winding density and the consistency of the geometric shape.

[0062] It should be noted that the length of the sliding groove 548 is reasonably set, which can not only ensure that the pressing blocks 545 are self-adaptively adjusted during the rotating process, but also avoid damaging the surface of the wire due to excessive pressure, while ensuring that the solidification effect is not affected.

[0063] In order to adapt to the diameter difference of the twisted layer wire and the deformation control requirement thereof, the diameters and lengths of the rotating sleeve 541 and the supporting sleeve 544 arranged from left to right increase layer by layer, and with the increase of the number of twisted layers, the sizes of the rotating sleeve 541 and the supporting sleeve 544 increase correspondingly, so as to match the twisting track and space layout of each layer of wire and ensure that the solidifying assembly 54 can effectively apply a pressing action to each layer of wire.

[0064] To further reduce the frictional resistance between the pressing block 545 and the wire, and improve the smoothness of the wire during the solidification process, a plurality of uniformly distributed rolling balls 549 are installed on the side of the pressing block 545 close to the axis of the supporting sleeve 544. The rolling balls 549 are in rolling contact with the outer surface of the wire. When the pressing block 545 exerts radial pressure on the wire, the sliding friction between them is effectively reduced, avoiding damage to the surface of the wire or unstable operation due to excessive friction.

[0065] As shown in Figure 2 the steel-cored aluminum stranded wire after being pressed and dynamically shaped layer by layer by the solidification assembly 54 is finally transported to the winding device 4 for centralized winding. The winding device 4 can realize stable traction and neat winding of the formed wire body. Only part of the structure of the winding device 4 is shown in the figure.

Claims

1. A stranding device for producing a steel-cored aluminum strand, characterized in that: The application relates to a cable stranding device. The stranding disc (5) is provided with rotating rings (52) on the outer side, the stranding disc (5) and the rotating rings (52) rotate synchronously and in opposite directions, each step surface of the stranding disc (5) is provided with uniformly distributed through holes (51) for penetrating the wires in the steel core stranding layer (1) and the inner aluminum stranding layer (2), and the rotating rings (52) are provided with through holes (51) matched with the wires in the outer aluminum stranding layer (3); The pre-deformation assembly (53) is arranged on the right side of the stranding disc (5) and corresponds to the steel wires and the aluminum wires, wherein the angle between each pre-deformation assembly (53) and the central axis of the stranding disc (5) gradually decreases from left to right for the steel wires, and the angle between each pre-deformation assembly (53) and the central axis of the stranding disc (5) gradually increases from left to right for the aluminum wires, so that the wires are pre-deformed for angle matching before stranding, and the wires are more suitable for the subsequent stranding mode; The solid assembly (54) is arranged between the adjacent wires and can rotate synchronously with the wires during the stranding process; The solid assembly (54) comprises rotating sleeves (541) which are arranged on the outer side of the corresponding wires and are coaxially arranged with the wires, the support frames (532) in the same pre-deformation assembly (53) are fixedly installed on the corresponding rotating sleeves (541), the rotating sleeves (541) corresponding to the steel core stranding layer (1) and the inner aluminum stranding layer (2) are fixedly connected with the stranding disc (5) through connecting frames (542), and the rotating sleeves (541) corresponding to the outer aluminum stranding layer (3) are fixedly connected with the rotating rings (52) through the connecting frames (542); The solid assembly (54) further comprises a support sleeve (544) arranged on the inner side of the rotating sleeve (541), the inner side of the support sleeve (544) is slidably installed with circumferentially uniformly distributed pressing blocks (545) along the radial direction, the pressing blocks (545) are connected with the outer wall of the support sleeve (544) through supporting springs (546), one side of the pressing blocks (545) towards the inner wall of the rotating sleeve (541) is provided with a matching column (547), and the inner side of the rotating sleeve (541) is provided with a sliding groove (548) which is slidably matched with the matching column (547), so that the pressing blocks (545) can adaptively slide along the sliding groove (548) during the rotation of the rotating sleeve (541), thereby uniformly applying radial pressure to the stranding wires and realizing dynamic solidification; The pressing blocks (545) are rollingly installed with uniformly distributed rolling balls (549) on the side close to the axis of the support sleeve (544), and the rolling balls (549) are in rolling contact with the outer surface of the wires.

2. A stranding device for producing steel-cored aluminum strand as claimed in claim 1, characterized in that: The pre-deformation assembly (53) comprises a plurality of uniformly distributed rotating rollers (531), the rotating rollers (531) are rotatably installed on the same support frame (532), the wires pass through the gaps between the rotating rollers (531) in sequence, and the support frames (532) at different positions are arranged in different inclined states according to the stranding angles of the wires. The lower side of the rotating roller (531) is provided with two shaped rotating discs (533) distributed left and right, the shaped rotating discs (533) are petal-shaped, and the two are engaged with each other and form complementary cooperation when rotating relative to each other, and the outer periphery of the shaped rotating discs (533) is provided with shaped grooves for accommodating the wire.

3. A stranding device for producing steel-cored aluminum strand according to claim 2, characterized in that: The rear side of the left and right two shaped rotating discs (533) is respectively provided with a rotating gear (534), the rotating gears (534) on the left and right sides are engaged with each other, the rear end of the lowermost rotating roller (531) and the rear end of one of the rotating gears (534) are both provided with a belt pulley (535), and the belt pulleys (535) are drivingly connected through a belt (536).

4. A stranding machine for producing steel-cored aluminum conductor strand as defined in claim 1, wherein: The left and right sides of the through hole (51) are both provided with a rotating roller (511) which is rotatably arranged, the outer side of the rotating roller (511) is provided with a limiting roller (512), the limiting roller (512) is rotatably arranged between two arc-shaped blocks (513) through a rotating shaft, the arc-shaped blocks (513) are slidingly matched with arc-shaped grooves (515) arranged on an arc-shaped plate (514), the arc-shaped plate (514) is fixedly connected with the corresponding twisting disc (5) and the rotating ring (52), and the arc-shaped blocks (513) are connected with the groove walls of the arc-shaped grooves (515) through connecting springs (516).

5. A stranding machine for producing steel-cored aluminium stranded conductor as claimed in claim 4, wherein: The left side of the twisting disc (5) is provided with a pay-off disc (6) fixedly connected therewith, the outer side of the pay-off disc (6) is sleeved with an outer ring (61) fixedly connected with the rotating ring (52), the pay-off disc (6) and the outer ring (61) are coaxially rotatably arranged on a same fixing table (7), the outer side of the pay-off disc (6) is fixedly sleeved with an outer gear ring (612), the inner side of the outer ring (61) is fixedly sleeved with an inner gear ring (613), the inner gear ring (613) and the outer gear ring (612) are engaged with a transmission gear (614), the transmission gear (614) is rotatably arranged on the fixing table (7), and the fixing table (7) is provided with a driving motor (615), and the output shaft of the driving motor (615) is fixedly connected with the center part of the pay-off disc (6).

6. A stranding machine for producing steel-cored aluminum strand as defined in claim 1, wherein The steel-cored aluminum stranded wire produced by the stranding device comprises a steel core stranded wire layer (1), an inner aluminum stranded wire layer (2) and an outer aluminum stranded wire layer (3) which are sequentially arranged from inside to outside. The steel core stranded wire layer (1) is twisted by a plurality of steel wires, and the twisting angles of the steel wires in different layers from inside to outside present a decreasing trend. The inner aluminum stranded wire layer (2) and the outer aluminum stranded wire layer (3) are both twisted by a plurality of aluminum wires, and the twisting angles of the aluminum wires in different layers from inside to outside present an increasing trend. The aluminum wire twisting angle of the outer aluminum stranded wire layer (3) is greater than that of the inner aluminum stranded wire layer (2).

7. A stranding machine for producing steel-cored aluminium stranded conductor according to claim 6, characterized in that: The steel wire twisting angles in the steel core stranded wire layer (1) from inside to outside are 17° and 15°, the aluminum wire twisting angles in the inner aluminum stranded wire layer (2) from inside to outside are 24°, 26° and 28°, and the aluminum wire twisting angle in the outer aluminum stranded wire layer (3) is 30°.

8. A stranding machine for producing steel-cored aluminium stranded conductor according to claim 7, characterized in that: The steel core stranded wire layer (1) and the inner aluminum stranded wire layer (2) are twisted in the same twisting direction, and the twisting directions of the outer aluminum stranded wire layer (3) and the inner aluminum stranded wire layer (2) are opposite.

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