Large-section layered combined high-voltage cable
By adopting large -section layered combined high -voltage cable design, using the internal and external circular layers and line layers of alternately twisted collisions to solve the problem of difficulty processing of large cross -section cable conductors and unreal surfaces, and achieve efficient cable production and performance promote.
Patent Information
- Application Number
- CN202421104370.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-21
AI Technical Summary
There are difficulties in the processing and compression process of existing large-section cable conductors. The large outer diameter leads to a non-round surface, large gaps, and low filling coefficient, which affects the performance of the cable.
It adopts a large-section layered combined high-voltage cable design, including a centrally pressed conductor and alternately twisted inner round wire layers, inner wire layers, outer round wire layers and outer wire layers, through T-type, Z-type, S-type The combination of wire and round wire uses shaped wire to fill the gap between round wires to improve the tightness and stability of the cable.
It achieves efficient processing and compaction of large-section conductors, improves cable surface roundness and overall tightness, reduces conductor material waste and production costs, and meets the production needs of larger-section cable conductors.
Smart Images
Figure CN222394586U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cable conductors, in particular to a large-section layered combined direct current high-voltage cable. Background Art
[0002] With the continuous and rapid development of my country's national economy and the continuous improvement of people's living standards, the demand for electricity in various industries is increasing. The insufficient supply of electric energy has become one of the important factors restricting the continuous and rapid development of my country's national economy. With the increasing demand for power transmission, the requirements for the cross-sectional size of cable conductors are also increasing. The maximum cross-sectional size of existing standard cable conductors is usually only 2500mm 2 , it is difficult to meet the needs of high current transmission. Although large-section cable conductors have higher current transmission capacity, traditional twisting equipment is difficult to twist 3000mm at a time. 2 The conductors with large cross-sections are too large to be pressed after the round wire is completed, and the processing is difficult. At the same time, the outer surface is prone to depression, the outer surface gap is large, the surface is not round, and the overall filling factor is low, resulting in a large conductor area, affecting the performance of the cable. In addition, during the operation of the cable conductor with large cross-section, there will be skin effect and proximity effect, which will increase the effective resistance of the conductor and cause a large amount of electrical energy consumption.
[0003] Therefore, those skilled in the art are committed to developing a large-section layered composite high-voltage cable that is easy to process and compact and improves surface roundness. Utility Model Content
[0004] In view of the above-mentioned defects of the prior art, the utility model discloses a large-section layered combined high-voltage cable, and the technical problem to be solved is to provide a large-section layered combined high-voltage cable that is conducive to processing and compaction and improves surface roundness.
[0005] To achieve the above-mentioned purpose, the utility model provides a large-section layered combined high-voltage cable, including a central compressed conductor, wherein a plurality of inner round wire layers and inner shaped wire layers are alternately twisted outside the central compressed conductor, and the first layer of the inner round wire layer is adjacent to the central compressed conductor, an outer round wire layer is arranged outside the outermost inner shaped wire layer, and an outer shaped wire layer is arranged outside the outer round wire layer; the inner shaped wire layer is a T-shaped wire layer, a Z-shaped wire layer or an S-shaped wire layer, and the outer shaped wire layer is a Z-shaped wire layer or an S-shaped wire layer.
[0006] The specific production process is as follows: first, complete the production of the center compressed conductor, which can be produced by concentrically stranded layered compressed round copper wire, and then transfer the center compressed conductor layer to the next twisting process, which is produced by a frame stranding machine. The round wire layer section of the frame stranding machine needs to add a compression mold to appropriately compress the twisted round wire to cause a certain plastic deformation. The T-type wire layer, Z-type wire layer or S-type wire layer only needs to be equipped with an anti-turnover paralleling mold to ensure that the wire does not turn over during the twisting process. The single wire of the T-type wire layer, Z-type wire layer or S-type wire layer is produced by a wire drawing machine or a metal extruder, and the cross-sectional size of the single wire needs to be strictly controlled to reduce the degree of deformation when the single wire is wound up and ensure the accuracy of the twisting.
[0007] Preferably, the diameter D of the circular single wires of the inner circular wire layer and the outer circular wire layer is 3≤D≤5mm, and the diameter of the circular single wires gradually decreases from the inner to the outer.
[0008] Preferably, the ratio of the profile height to the width of the inner profile layer and the outer profile layer is 0.6 to 0.8, and the profile height is less than 5 mm. By controlling the specifications of the round single wire and the profile, the tightness and stability of the cable structure are ensured.
[0009] Preferably, the side of the T-shaped line layer with a larger single line width faces outwards.
[0010] Preferably, the Z-shaped line layer has its right-angled side with the longer side facing outwards.
[0011] Preferably, the longer right-angled side of the S-shaped line layer faces outwards.
[0012] The face with a larger width corresponds to the longest line on the contour line, the face with a longer right-angled side corresponds to the two longest right-angled sides, and the faces with a larger width and a longer right-angled side facing outward are in line with the trend that the cable diameter gradually increases from the inside to the outside, which is more conducive to improving the tightness of the cable.
[0013] Preferably, the number of layers of the inner round line layer and the inner mold line layer is at least one each, that is, the number of layers of the inner round line layer and the inner mold line layer can be multiple layers, but they must be staggered, and the round line layer cannot contact the round line layer, and must be isolated by the mold line layer to achieve the effect of facilitating processing and compacting and improving surface roundness.
[0014] The beneficial effects of the utility model are:
[0015] By alternately twisting the inner round wire layer and the inner profile wire layer and the outer round wire layer and the outer profile wire layer, and combining the T-type wire, Z-type wire, S-type wire and round wire, the profile wire can just fill the gap between the round wires, which is conducive to processing and compaction. When twisting, only the round wire layer needs to be compacted, and the profile wire layer does not need to be compacted, so as to ensure the overall roundness of the cable and reduce the overall diameter of the cable. At the same time, through a reasonable twisting sequence and angle, specifically, the twisting directions between adjacent wire layers are opposite, and the twisting direction of the outermost layer should be left-handed; from the inner layer to the outermost layer, the pitch-diameter ratio decreases successively. In this way, the tightness and stability of the cable structure are ensured, thereby solving the problems of difficult processing of large-section conductors, excessive outer diameter of round wire compacted conductors, and large outer surface gaps. At the same time, the comprehensive filling factor and production efficiency of large-section conductors are improved, production costs are reduced, and the waste of conductor materials is reduced, meeting the production requirements of larger-section cable conductors, and adapting to the development needs of the power transmission industry. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.
[0017] In the above figures: 1, center compressed conductor; 2, inner round wire layer; 3, inner molded wire layer; 4, outer round wire layer; 5, outer molded wire layer. DETAILED DESCRIPTION
[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific manner, and therefore cannot be understood as a limitation on the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0019] like Figure 1As shown, the utility model provides a large-section layered combined high-voltage cable, including a central compressed conductor 1, and the central compressed conductor 1 is surrounded by a plurality of inner wire layers, each of which includes an inner round wire layer 2 and an inner molded wire layer 3, but the adjacent inner wire layers need to be arranged alternately, that is, a plurality of inner round wire layers 2 and inner molded wire layers 3 are alternately twisted outside the central compressed conductor 1, and the number of layers of the inner round wire layer 2 and the inner molded wire layer 3 is at least one layer each, that is, the number of layers of the inner round wire layer 2 and the inner molded wire layer 3 can be multiple layers, but they must be staggered, and the round wire layers cannot contact the round wire layers, and must be isolated by the molded wire layer, so as to achieve the effect of facilitating processing and compaction and improving the roundness of the surface. At the same time, the first inner round wire layer 2 from the inside to the outside is adjacent to the central compressed conductor 1, and the outermost inner molded wire layer 3 is provided with an outer round wire layer 4, and the outer round wire layer 4 is provided with an outer molded wire layer 5. Specifically, the inner wire layer 3 is a T-shaped wire layer, a Z-shaped wire layer or an S-shaped wire layer, and the outer wire layer 5 is a Z-shaped wire layer or an S-shaped wire layer. When twisting, if it is a T-shaped wire layer, the side with a larger single wire width faces outward, if it is a Z-shaped wire layer, the side with a longer right-angled side of the wire faces outward, and if it is an S-shaped wire layer, the side with a longer right-angled side of the wire faces outward. The side with a larger width is the side corresponding to the longest line on the contour line, and the side with a longer right-angled side is the side corresponding to the two longest right-angled sides. The side with a larger width and the side with a longer right-angled side facing outward conform to the trend that the cable diameter gradually increases from the inside to the outside, which is more conducive to improving the tightness of the cable.
[0020] In the above embodiments, by alternately twisting the inner round wire layer 2 and the inner profile wire layer 3 and the outer round wire layer 4 and the outer profile wire layer 5, and combining the T-shaped wire, Z-shaped wire, S-shaped wire and round wire, the profile wire can just fill the gap between the round wires, which is conducive to processing and compacting. When twisting, only the round wire layer needs to be compacted, and the profile wire layer does not need to be compacted, so as to ensure the overall roundness of the cable and reduce the overall diameter of the cable. At the same time, through a reasonable twisting sequence and angle, specifically, the twisting directions between adjacent wire layers are opposite, and the twisting direction of the outermost layer should be left-handed; from the inner layer to the outermost layer, the pitch-diameter ratio decreases successively. In this way, the tightness and stability of the cable structure are ensured, thereby solving the problems of difficult processing of large-section conductors, excessive outer diameter of round wire compacted conductors, and large outer surface gaps. At the same time, the comprehensive filling factor and production efficiency of large-section conductors are improved, production costs are reduced, and the waste of conductor materials is reduced, meeting the production requirements of larger-section cable conductors, and adapting to the development needs of the power transmission industry.
[0021] More specifically, the diameter D of the circular single wire of the inner circular wire layer 2 and the outer circular wire layer 4 is 3≤D≤5mm, and the diameter of the circular single wire gradually decreases from the inner to the outer, and the diameter D of the circular single wire is specifically designed according to the outer diameter of the cable and the number of layers. Among them, the ratio of the height to the width of the inner molded wire layer 3 and the outer molded wire layer 5 is 0.6 to 0.8, preferably 0.7, and the molded wire height is less than 5mm. By controlling the specifications of the circular single wire and the molded wire, it is helpful to ensure the tightness and stability of the cable structure.
[0022] The specific production process is as follows: first, complete the production of the center compressed conductor 1, which can be produced by concentrically twisted layered compressed round copper wire, and then transfer the center compressed conductor 1 to the next twisting process, which is produced by a frame twisting machine. The round wire layer section of the frame twisting machine needs to add a compression mold to appropriately compress the twisted round wire to cause a certain plastic deformation. The T-type wire layer, Z-type wire layer or S-type wire layer only needs to be equipped with an anti-turnover paralleling mold to ensure that the wire does not turn over during the twisting process. The single wire of the T-type wire layer, Z-type wire layer or S-type wire layer is produced by a wire drawing machine or a metal extruder. The cross-sectional size of the single wire needs to be strictly controlled to reduce the degree of deformation when the single wire is wound up and to ensure the accuracy of the twisting. In addition, during the twisting process, the twisting speed and tension need to be controlled. Generally, the twisting speed is not more than 10 meters / minute, and the tension is adjusted according to the actual situation to ensure the twisting quality and conductor performance.
[0023] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.
Claims
1. A large-section layered combined high-voltage cable, characterized in that: The invention comprises a central compressed conductor (1), wherein a plurality of inner round wire layers (2) and inner profile wire layers (3) are alternately twisted outside the central compressed conductor (1), and the first layer of the inner round wire layer (2) is adjacent to the central compressed conductor (1), an outer round wire layer (4) is arranged outside the outermost layer of the inner profile wire layer (3), and an outer profile wire layer (5) is arranged outside the outer round wire layer (4); the inner profile wire layer (3) is a T-shaped wire layer, a Z-shaped wire layer or an S-shaped wire layer, and the outer profile wire layer (5) is a Z-shaped wire layer or an S-shaped wire layer.
2. The large-section layered combined high-voltage cable according to claim 1, characterized in that: The diameter D of the circular single wires of the inner circular wire layer (2) and the outer circular wire layer (4) is 3≤D≤5mm.
3. The large-section layered combined high-voltage cable according to claim 2, characterized in that: The ratio of the profile height to the width of the inner profile layer (3) and the outer profile layer (5) is 0.6 to 0.8, and the profile height is less than 5 mm.
4. The large-section layered combined high-voltage cable according to claim 1, characterized in that: The side of the T-shaped line layer with a larger single line width faces outward.
5. The large-section layered combined high-voltage cable according to claim 1, characterized in that: The Z-shaped line layer has a longer right-angled side facing outwards.
6. The large-section layered combined high-voltage cable according to claim 1, characterized in that: The longer right-angled sides of the S-shaped line layer face outwards.
7. The large-section layered combined high-voltage cable according to claim 1, characterized in that: The number of layers of the inner round wire layer (2) and the inner mold wire layer (3) is at least one layer each.