Stranding and pre-twisting device for special-shaped monofilaments

Abstract

The utility model discloses a twisting and pre-twisting device for a special-shaped monofilament in the technical field of submarine cable production. The twisting and pre-twisting device comprises a branching disc; the plurality of mounting seats are arranged at intervals around the center of the noseplate; two ends of the mounting seat respectively extend out of the branching disc to form bearing seats; bearings are mounted on the bearing seats; a die sleeve mounting groove is formed in the periphery of each mounting seat of the wire distributing plate; the number of the first die sleeves and the number of the second die sleeves are in one-to-one correspondence with the number of the mounting seats, and the first die sleeves and the second die sleeves are mounted at the two ends of the corresponding mounting seats respectively, sleeve the corresponding bearings respectively and are inserted into the die sleeve mounting grooves; the multiple wire passing dies are installed in the first die sleeves and the second die sleeves respectively, special-shaped monofilament positioning holes are formed in the centers of the wire passing dies, and through holes are formed in the centers of the first die sleeves and the centers of the second die sleeves respectively. According to the twisting and pre-twisting device, the angles between the special-shaped monofilaments can be adjusted before the special-shaped monofilaments and the conductor are twisted, the defect that gaps exist in the outermost layer when the special-shaped conductor is twisted is overcome, and the quality of the finished special-shaped conductor is improved.

Description

Technical Field

[0001] This utility model relates to the field of submarine cable manufacturing technology, and in particular to a pre-twisting device for stranding irregularly shaped monofilaments. Background Technology

[0002] To meet the reliability and economic requirements of long-distance power transmission, submarine cables have been converted from AC to DC. This not only requires an increase in voltage specifications to around 500kV, but also a significant increase in conductor cross-section. Conventional tightly wound round conductor structures cannot meet the manufacturing needs of large-section conductors. Shaped conductors, on the other hand, offer structural stability, a smooth, burr-free surface, and a high compression coefficient, making them suitable for applications requiring high current carrying capacity and long-distance laying. Furthermore, they effectively prevent cable breakdown, improving production quality and performance.

[0003] However, in actual manufacturing, stranding irregularly shaped conductors is difficult, and defects such as flipping, arching, and outermost layer gaps are easily encountered during stranding. Through continuous process improvements, adjusting parameters such as stranding pitch, pre-twist angle, single-wire tension, water-blocking material thickness, wire threading hole position, and distributor position can largely eliminate flipping and arching defects, but the outermost layer gap defect remains unresolved. Careful observation revealed that when the outermost irregularly shaped single wires enter the stranding mold, the angles between the single wires differ significantly, resulting in an irregular arrangement. However, by manually bending the irregularly shaped single wires to the appropriate angle, the outermost layer gap almost disappears.

[0004] Therefore, how to adaptively adjust the angle of irregular monofilaments is an urgent problem to be solved. Utility Model Content

[0005] This application provides a pre-twisting device for stranding irregular monofilaments, which achieves the purpose of pre-twisting the irregular monofilaments before stranding to adjust the angle between each irregular monofilament, thereby avoiding the defect of outermost gaps when irregular conductors are stranded.

[0006] This application provides a pre-twisting device for stranding irregularly shaped monofilaments, comprising:

[0007] Distributor panel;

[0008] Multiple mounting bases are disposed on the distribution plate and spaced apart around the center of the distribution plate; each mounting base has a wire through hole in its center, and both ends of the mounting base extend outward from the distribution plate to form bearing seats; each bearing seat is equipped with a bearing; each of the distribution plates has a mold sleeve mounting groove on the outer periphery of each mounting base.

[0009] Multiple first mold sleeves correspond one-to-one with the mounting base and are respectively installed at one end of the mounting base. The first mold sleeve is sleeved on the bearing and inserted into the mold sleeve mounting groove.

[0010] Multiple second mold sleeves correspond one-to-one with the mounting base and are respectively installed on the other end of the mounting base. The second mold sleeves are sleeved on the bearing and inserted into the mold sleeve mounting groove.

[0011] Multiple wire guide dies are respectively installed in each of the first die sleeves and each of the second die sleeves. The center of each wire guide die is provided with a shaped monofilament positioning hole, and the center of each of the first die sleeves and the second die sleeves is provided with a through hole.

[0012] The beneficial effects of the above embodiments are as follows: the irregular monofilament passes through the distribution plate along the central through hole of the first mold sleeve, the irregular monofilament positioning hole of the wire guide mold, the central wire threading hole of the mounting base, the irregular monofilament positioning hole of the wire guide mold, and the central through hole of the second mold sleeve. The irregular monofilament positioning hole of the wire guide mold matches the shape and size of the irregular monofilament to limit the rotation of the irregular monofilament within the positioning hole. The wire guide mold is relatively fixed to the first mold sleeve or the second mold sleeve, so that the angle of the corresponding irregular monofilament changes when the first mold sleeve and the second mold sleeve are rotated. The stranding pre-twisting device can adjust the angle between each irregular monofilament before stranding them with the conductor, avoiding the defect of the outermost layer gap when the irregular conductor is stranded, and improving the quality of the finished irregular conductor.

[0013] Based on the above embodiments, this application can be further improved as follows:

[0014] In one embodiment of this application, the mounting base and the distributor plate are integrally formed. The distributor plate is a large circular plate with mounting bases formed near its outer edge, and the mounting bases are evenly distributed around the circumference.

[0015] In one embodiment of this application, a conductor through-hole is provided at the center of the distribution panel for the conductor to pass through.

[0016] In one embodiment of this application, a bearing limiting step is provided on the bearing housing to define the bearing position.

[0017] In one embodiment of this application, the first mold sleeve and the second mold sleeve are respectively provided with a first mounting groove and a second mounting groove. The first mounting groove is used for mounting the wire mold, and the second mounting groove is used for fitting the bearing.

[0018] In one embodiment of this application, the first mounting groove has a mold fixing hole on its sidewall, and the wire guide mold has a corresponding mold mounting hole on its sidewall. Bolts are screwed into the mold fixing hole and the mold mounting hole to fix the wire guide mold to the first mold sleeve and the second mold sleeve, preventing the wire guide mold from moving or rotating.

[0019] In one embodiment of this application, the distribution plate has a plurality of first positioning holes on its circumferential surface. Each first positioning hole extends inward through the mold sleeve mounting groove. The sidewalls of the second mounting grooves of the first and second mold sleeves each have a plurality of second positioning holes. These second positioning holes are equidistantly spaced around the axis of the first or second mold sleeve, and the second positioning holes match the first positioning holes. When the first or second mold sleeve is inserted into the mold sleeve mounting groove and rotated to a specific angle, bolts are screwed into the first and second positioning holes to fix the first or second mold sleeve to the distribution plate. Switching between different second positioning holes allows the first or second mold sleeve to be fixed at different angles, i.e., fixing the shaped monofilament at different torsion angles. The second positioning holes are evenly distributed along the circumference, with a spacing of 5° to 15° between each pair depending on the mold sleeve diameter. The positions of the second positioning holes correspond to the first positioning holes, allowing bolts to pass through, thus achieving 360° pre-twist of the shaped monofilament.

[0020] In one embodiment of this application, the cross-sectional area of ​​the shaped monofilament positioning hole gradually decreases along the advancing direction of the shaped monofilament until it matches the size of the shaped monofilament, forming an overall trumpet shape.

[0021] In one embodiment of this application, the irregular monofilament positioning hole is provided with a rounded chamfer at the outlet of the irregular monofilament.

[0022] In one embodiment of this application, the mounting base, the first mold sleeve, the second mold sleeve, and the guide mold are all cylindrical. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0024] Figure 1 This is a front view schematic diagram of a twisting and pre-twisting device for irregularly shaped monofilaments according to an embodiment of this application;

[0025] Figure 2 This is a rear view schematic diagram of a twisting and pre-twisting device for irregularly shaped monofilaments according to an embodiment of this application;

[0026] Figure 3 for Figure 2 Cross-sectional view along line AA;

[0027] Figure 4 This is a schematic diagram of a partial explosion structure.

[0028] Among them, 1. wire divider, 11. wire guide hole, 12. mold sleeve mounting groove, 13. first positioning hole, 2. mounting base, 21. wire threading hole, 22. bearing seat, 221. limiting step, 3. bearing, 4. first mold sleeve, 41. first mounting groove, 411. mold fixing hole, 42. second mounting groove, 421. second positioning hole, 5. second mold sleeve, 6. wire guide mold, 61. irregular single wire positioning hole, 62. mold mounting hole. Detailed Implementation

[0029] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and not for limiting the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this utility model, it should be noted that the terms "vertical," "outer peripheral surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In the description of this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples described in this utility model, as well as the features of different embodiments or examples.

[0034] Example:

[0035] like Figure 1-4 As shown, a twisting and pre-twisting device for irregular monofilaments includes: a wire separating disc 1, a mounting base 2, a bearing 3, a first die sleeve 4, a second die sleeve 5, and a wire guide die 6.

[0036] The wire distributor 1 is a large circular disc with a conductor pass-through hole 11 in the center for the conductor to pass through. Multiple mounting seats 2 are provided on the edge of the wire distributor 1. The mounting seats 2 are evenly distributed around the circumference, and the number of them must be greater than or equal to the number of irregular monofilaments to be twisted. In this embodiment, there are 8 mounting seats 2.

[0037] The mounting base 2 has a wire hole 21 in the center for passing through a non-standard monofilament. Both ends of the mounting base 2 extend to the outside of the splitter plate 1 to form bearing seats 22. Bearings 3 are installed on both bearing seats 22. The splitter plate 1 has a mold sleeve mounting groove 12 on the outer periphery of each mounting base 2. The mold sleeve mounting groove 12 is located outside the bearing seat 22 and is used to mate with the mold sleeve so that the mold sleeve can be inserted into the groove.

[0038] The number of the first mold sleeve 4 and the second mold sleeve 5 corresponds one-to-one with the mounting base 2, and they are respectively installed at both ends of the corresponding mounting base 2. The first mold sleeve 4 and the second mold sleeve 5 are respectively sleeved on the corresponding bearing 3 and inserted into the mold sleeve mounting groove 12. The center of the first mold sleeve 4 and the second mold sleeve 5 are respectively provided with through holes for the irregular monofilament to pass through.

[0039] Multiple wire guide dies 6 are respectively installed in each first die sleeve 4 and each second die sleeve 5. A special-shaped monofilament positioning hole 61 is opened in the center of the wire guide die 6. The special-shaped monofilament positioning hole 61 of the wire guide die 6 matches the shape and size of the special-shaped monofilament to limit the rotation of the special-shaped monofilament in the positioning hole. In this embodiment, both the special-shaped monofilament and the special-shaped monofilament positioning hole 61 are fan-shaped.

[0040] The first mold sleeve 4 and the second mold sleeve 5 are respectively provided with a first mounting groove 41 and a second mounting groove 42. The first mounting groove 41 matches the wire guide mold 6 for installation, and the second mounting groove 42 matches the bearing 3 for sleeve connection. The side wall of the first mounting groove 41 has a mold fixing hole 411, and the side wall of the wire guide mold 6 has a corresponding mold mounting hole 62. Bolts are screwed into the mold fixing hole 411 and the mold mounting hole 62 to fix the wire guide mold 6 to the first mold sleeve 4 and the second mold sleeve 5, preventing the wire guide mold 6 from moving or rotating. Multiple mold fixing holes 411 are evenly distributed around the circumference of the first mold sleeve 4 or the second mold sleeve 5, and are threaded and continuous, while the mold mounting holes 62 are threaded but not continuous. The first mounting groove 41 is positioned slightly differently in the first mold sleeve 4 and the second mold sleeve 5, respectively, before the shaped guide wire enters the wire threading hole 21 and after the wire exiting the wire threading hole 21, in order to control the torsion angle of the shaped monofilament as stably as possible.

[0041] Multiple first positioning holes 13 are provided on the circumference of the distributor plate 1 corresponding to the mold sleeve mounting groove 12 of the mounting base 2. Each first positioning hole 13 passes through the mold sleeve mounting groove 12 and extends inward. Multiple second positioning holes 421 are provided on the sidewalls of the second mounting groove 42 of the first mold sleeve 4 and the second mold sleeve 5. The multiple second positioning holes 421 are equidistantly spaced around the axis of the first mold sleeve 4 or the second mold sleeve 5. The second positioning holes 421 are threaded and through, while the first positioning holes 13 are threaded but not through. The second positioning holes 421 and the first positioning holes 13 are matched. When the first mold sleeve 4 or the second mold sleeve 5 is inserted into the mold sleeve mounting groove 12 and rotated to a specific angle, the bolt is screwed into the first positioning hole 13 and the second positioning hole 421 to fix the first mold sleeve 4 or the second mold sleeve 5 to the distributor plate 1. By switching different second positioning holes 421, the first mold sleeve 4 or the second mold sleeve 5 can be fixed at different angles, that is, the irregular monofilament is fixed at different torsion angles. The second positioning holes 421 are evenly distributed along the circumference, with a spacing of 5°-15° between each pair depending on the diameter of the mold sleeve. The position of the second positioning holes 421 corresponds to the first positioning hole 13, allowing the bolt to pass through and enabling 360° pre-twisting of the irregular single wire. In this embodiment, the second positioning holes 421 are set with a spacing of 15° between each pair.

[0042] Based on the above embodiments, this application can be further improved as follows:

[0043] Furthermore, the mounting base 2 and the distribution plate 1 are integrally formed.

[0044] Furthermore, the bearing housing 22 is provided with a bearing 3 limiting step 221 to abut against the inner ring of the bearing 3, preventing the outer ring of the bearing 3 from contacting the distributor plate 1, so that the outer ring of the bearing 3 can rotate.

[0045] Furthermore, the mounting base 2, the first mold sleeve 4, the second mold sleeve 5, and the guide mold 6 are all cylindrical.

[0046] Furthermore, the cross-sectional area of ​​the irregular monofilament positioning hole 61 gradually decreases along the direction of the irregular monofilament's movement until it matches the size of the irregular monofilament, forming an overall trumpet shape. In reality, the irregular monofilament positioning hole 61 and the irregular monofilament are in a clearance fit. The clearance cannot be too large to ensure the positioning effect, nor can it be too small to avoid transitional loss through the die 6. The size of the clearance is determined according to actual needs.

[0047] Furthermore, the irregular monofilament positioning hole 61 has a rounded chamfer at the outlet of the irregular monofilament.

[0048] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0049] The irregular monofilament passes through the center through hole of the first die sleeve, the irregular monofilament positioning hole of the wire pass die, the center wire pass hole of the mounting base, the irregular monofilament positioning hole of the wire pass die, and the center through hole of the second die sleeve. When the first die sleeve and the second die sleeve are rotated, the angle of the corresponding irregular monofilament changes accordingly. Therefore, the stranding pre-twisting device can adjust the angle between each irregular monofilament before stranding them with the conductor, avoiding the defect of the outermost layer gap when the irregular conductor is stranded, and improving the quality of the finished irregular conductor.

[0050] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A device for pre-twisting and twisting irregularly shaped monofilaments, characterized in that, include: Divider plate; Multiple mounting bases are disposed on the distribution plate and spaced apart around the center of the distribution plate; each mounting base has a wire through hole in its center, and both ends of the mounting base extend outward from the distribution plate to form bearing seats; each bearing seat is equipped with a bearing; each of the distribution plates has a mold sleeve mounting groove on the outer periphery of each mounting base. Multiple first mold sleeves correspond one-to-one with the mounting base and are respectively installed at one end of the mounting base. The first mold sleeve is sleeved on the bearing and inserted into the mold sleeve mounting groove. Multiple second mold sleeves correspond one-to-one with the mounting base and are respectively installed on the other end of the mounting base. The second mold sleeves are sleeved on the bearing and inserted into the mold sleeve mounting groove. Multiple wire guide dies are respectively installed in each of the first die sleeves and each of the second die sleeves. The center of each wire guide die is provided with a shaped monofilament positioning hole, and the center of each of the first die sleeves and the second die sleeves is provided with a through hole.

2. The twisting pre-twisting device according to claim 1, characterized in that: The mounting base is integrally formed with the distribution panel.

3. The twisting pre-twisting device according to claim 1, characterized in that: The center of the distribution panel has a conductor wire hole.

4. The twisting pre-twisting device according to claim 1, characterized in that: The bearing housing is provided with a bearing limiting step.

5. The twisting pre-twisting device according to claim 1, characterized in that: The first mold sleeve and the second mold sleeve are respectively provided with a first mounting groove and a second mounting groove. The first mounting groove is used for the installation of the wire mold, and the second mounting groove is used to fit the bearing.

6. The twisting pre-twisting device according to claim 5, characterized in that: The first mounting groove has a mold fixing hole on its side wall, and the wire guide mold has a corresponding mold mounting hole on its side wall.

7. The twisting pre-twisting device according to claim 5, characterized in that: The distribution plate has multiple first positioning holes on its circumference. Each first positioning hole extends inward through the mold sleeve mounting groove. The second mounting groove has multiple second positioning holes on its sidewall. The multiple second positioning holes are equidistantly spaced around the axis of the first mold sleeve or the second mold sleeve. The second positioning holes match the first positioning holes.

8. The twisting pre-twisting device according to claim 1, characterized in that: The cross-sectional area of ​​the positioning hole of the irregular monofilament gradually decreases along the direction of travel of the irregular monofilament.

9. The twisting pre-twisting device according to claim 1, characterized in that: The irregular monofilament positioning hole is provided with a rounded chamfer at the outlet of the irregular monofilament.

10. The twisting pre-twisting device according to claim 1, characterized in that: The mounting base, the first mold sleeve, the second mold sleeve, and the guide mold are all cylindrical.

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