Anti-seismic corrosion-resistant polyethylene new energy cable

Abstract

The invention relates to the technical field of cables, and particularly discloses an anti-seismic corrosion-resistant polyethylene new energy cable which comprises four wire cores, polyethylene insulating layers are arranged on the outer surfaces of the wire cores, four filling layers wrap the outer sides of the four wire cores, and a braid layer wraps the outer sides of the four filling layers. The outer side of the braid layer is fixedly connected with a protective layer, and the protective layer is composed of 85% of a high-density polyethylene matrix and 15% of a perfluoropolyether elastomer; the outer side face of the protective layer is fixedly connected with a plurality of protrusions, the protrusions are hemispherical, the tangent line between every two adjacent protrusions in the circumferential direction is located on the outer side of the protective layer, and the protrusions are made of elastic materials. Impact force borne by the cable is buffered through the elasticity of the protrusions and the elasticity of the protection layer, the probability that the protection layer makes direct contact with the ground or other hard objects is reduced under the supporting effect of the multiple protrusions, and therefore surface abrasion caused by friction is remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to an earthquake-resistant and corrosion-resistant polyethylene new energy cable. Background Art

[0002] With the continued growth in electricity demand and the expansion of power grids, cross-linked polyethylene (XLPE) insulated power cables are widely used in long-distance, high-voltage transmission projects due to their excellent electrical performance and thermal stability. However, in actual operation, cables often face complex and changing environments, and are inevitably subjected to mechanical forces such as squeezing and dragging from external objects. These external forces initially cause minor localized wear on the cable's outer sheath. If not detected and addressed promptly, these initial damage will gradually expand over time and with repeated stress, evolving into visible cracks or even ruptures, seriously compromising the integrity of the cable's outer sheath.

[0003] Once the outer protective layer is damaged, the inner cross-linked polyethylene insulation layer is directly exposed to the external environment and is extremely susceptible to moisture, contaminants, and further mechanical damage, resulting in a significant decline in its original excellent insulation performance. This not only weakens the safe operation of the cable system but can also cause serious accidents such as electrical breakdown, leakage, and short circuits, threatening the stability and reliability of the power grid. Summary of the Invention

[0004] In order to overcome the problems raised in the above background technology, the present invention provides a shock-resistant and corrosion-resistant polyethylene new energy cable.

[0005] The technical solution of the present invention is: a seismic and corrosion-resistant polyethylene new energy cable, comprising four cores, the outer surface of each core being provided with a polyethylene insulation layer, the four cores being circumferentially equidistantly distributed, the outer sides of the four cores being wrapped with four circumferentially equidistantly distributed filling layers, the outer sides of the four filling layers being wrapped with a braided layer, the outer side of the braided layer being fixed with a protective layer, the protective layer being composed of 85% high-density polyethylene matrix and 15% perfluoropolyether elastomer; The outer side surface of the protective layer is fixed with a plurality of evenly distributed protrusions, the protrusions are hemispherical, and the tangent between two adjacent protrusions in the circumferential direction is located on the outside of the protective layer. The protrusions are made of elastic material, and the elastic coefficient of the protrusions is smaller than the elastic coefficient of the protective layer.

[0006] Furthermore, a support member is fixedly connected between the four wire cores. The support member is made of elastic material and is provided with a plurality of evenly distributed grooves. The grooves are used to provide a bending range for the support member.

[0007] Furthermore, the cross section of the support member is cross-shaped, and the four wire cores are respectively located at four angles of the support member. The support member separates the four wire cores to ensure the distance between two adjacent wire cores.

[0008] Furthermore, a through hole is provided in the middle of the support member, and a plurality of holes equidistantly distributed circumferentially are provided in the groove of the support member, and the holes are used to provide space for the circumferential torsion of the support member.

[0009] Furthermore, a reinforcing rib is provided in the through hole of the support member, and the material of the reinforcing rib is a shape memory polymer, which is used to assist the support member in maintaining the deformed state.

[0010] Furthermore, there is a gap between the support member and the reinforcement rib, and a plurality of evenly distributed elastic rings are fixed in the through hole of the support member. The inner side of the elastic ring is fixed to the reinforcement rib, and the plurality of elastic rings and the plurality of grooves are alternately distributed.

[0011] Furthermore, it also includes four elastic sheets, which are respectively arranged between two adjacent wire cores, and the elastic sheets are in contact with the support member and the adjacent filling layer. The elastic sheet is provided with a card slot, and the filling layer is provided with a convex strip. The convex strips of two adjacent filling layers are used to be installed in the card slots of the corresponding elastic sheets. The inner side surfaces of the four elastic sheets are on a circular trajectory, and the circular trajectory is the torsional trajectory of the outer edge of the support member.

[0012] Furthermore, the elastic sheet is fixed with a plurality of evenly distributed fixing blocks, and the fixing blocks are located in the corresponding grooves.

[0013] Furthermore, a fixing frame is fixed to the outside of each wire core, and the fixing frame consists of two parts. The outer edge of the cross-section of the fixing frame is a regular hexagon, and the filling layer, the support member, the elastic sheet and the fixing block are respectively in contact with adjacent fixing frames, and the fixing frame is provided with multiple evenly distributed chambers.

[0014] Furthermore, it also includes a plurality of evenly distributed fixing columns, which are embedded in the adjacent filling layers. The ends of the fixing columns located outside the filling layers are conical. The fixing columns penetrate the braided layer and are inserted into the protective layer. The braided layer is spirally cross-woven.

[0015] The beneficial effects are as follows: the present invention improves the corrosion resistance of the cable through the molecular-level anti-corrosion network composed of the perfluoropolyether elastomer component in the protective layer, and at the same time buffers the impact force on the cable through the elasticity of the protrusions and the elasticity of the protective layer, and under the support of multiple protrusions, reduces the probability of the protective layer directly contacting the ground or other hard objects, thereby significantly reducing the surface wear caused by friction; the support separates the four cores to ensure that the distance between two adjacent cores remains unchanged, reducing mutual interference between the cores; the grooves provided on the support provide space for the bending of the support, so that The cable is bent at a specified angle; through the arrangement of elastic sheets and fixed blocks, multiple cavities are created inside the cable to reduce the weight of the cable. At the same time, the cavities absorb shock like springs, thereby improving the seismic resistance of the cable; the support formed by the fixed frame reduces the changes in the cross-sectional area and resistance of the wire core, thereby ensuring the normal operation of the cable; the fixed columns penetrate the braided layer, so that when the cable is stretched, the fixed columns can exert directional extrusion on the braided layer, causing it to undergo uniform shrinkage deformation, thereby achieving uniform distribution of tensile stress on the entire cable and improving the tensile performance and structural stability of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a cross-sectional view of the wire core and the support member of the present invention; Figure 3 This is a schematic structural diagram of the support member and the fixing frame of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the reinforcing rib and the elastic ring of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the elastic sheet and the fixing block of the present invention; Figure 6 It is a cross-sectional view of the elastic sheet and the fixing frame of the present invention; Figure 7 An exploded view of the wire core and the fixing frame of the present invention; Figure 8 It is a cross-sectional view of the filling layer and the protective layer of the present invention.

[0017] The names and serial numbers of the parts in the figure are: 1. Wire core, 2. Filling layer, 3. Braided layer, 4. Protective layer, 5. Protrusion, 6. Support part, 601. Groove, 602. Hole, 7. Reinforcement rib, 701. Elastic ring, 8. Elastic sheet, 801. Fixing block, 9. Fixing frame, 901. Chamber, 10. Fixing column. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] Example 1: A new energy cable of earthquake-resistant and corrosion-resistant polyethylene, such as Figure 1 and Figure 2 As shown, it includes four wire cores 1 distributed equidistantly in the circumferential direction, and the outer surface of each wire core 1 is provided with a polyethylene insulation layer. The outer side of the four wire cores 1 is wrapped with four filling layers 2 distributed equidistantly in the circumferential direction. The filling layer 2 is a foamed polyethylene material, and 90% of the filling layer 2 is closed small bubbles. The outer side of the four filling layers 2 is wrapped with a braided layer 3, which is aramid fiber. The outer side of the braided layer 3 is fixed with a protective layer 4, which is composed of 85% high-density polyethylene matrix and 15% perfluoropolyether elastomer. The high-density polyethylene matrix is ​​used to make it elastic, and the perfluoropolyether The elastomer is used to form a molecular-level anti-corrosion network to improve its corrosion resistance; the outer side of the protective layer 4 is fixed with a plurality of evenly distributed protrusions 5, the protrusions 5 are hemispherical, and the tangent between two adjacent protrusions 5 in the circumferential direction is located on the outside of the protective layer 4, so that when the cable contacts the ground, the outer edge of the protrusion 5 contacts the ground first, and the protrusion 5 is made of elastic material, and the elastic coefficient of the protrusion 5 is smaller than the elastic coefficient of the protective layer 4. The protrusion 5 and the protective layer 4 form a secondary buffer structure to enhance the seismic performance of the cable. According to needs, an armor layer can also be wrapped between the braided layer 3 and the protective layer 4.

[0020] Specific working principle: During the assembly process of the cable, the four cores 1 are combined together, and then four filling layers 2 are wrapped around the outside of the four cores 1. At the same time, a braided layer 3 is wrapped around the outside of the filling layer 2 to complete the initial assembly of the cable. After that, it is passed through an existing extruder, and a protective layer 4 is wrapped around the outside of the braided layer 3. At the same time, evenly distributed protrusions 5 are bonded to the outside of the protective layer 4 in sequence to complete the cable assembly.

[0021] During use of the assembled cable, the support of the protrusion 5 reduces the probability of the protective layer 4 directly contacting the ground or other hard objects, thereby significantly reducing the surface wear caused by friction. At the same time, under the dual buffering effect of the protrusion 5 and the protective layer 4, the external extrusion force exerted on the cable is effectively dispersed and graded, reducing the mechanical stress borne by the cable body, thereby improving the adaptability and durability of the cable in complex laying environments, thereby better maintaining its insulation performance and overall structural integrity, and ultimately improving the safety and reliability of the cable system operation.

[0022] Example 2: Based on Example 1, Figure 2 and Figure 3As shown, a support member 6 is bonded between the four cores 1. The support member 6 is made of elastic material and is provided with a plurality of evenly distributed grooves 601. The grooves 601 are used to provide a bending range for the support member 6, which is convenient for users to bend the cable. At the same time, affected by the size of the grooves 601, after the support member 6 is bent at a specified angle, the two side surfaces of the inner wall of the grooves 601 fit together to form a supporting effect, thereby preventing the four cores 1 in the cable from being excessively bent. The cross section of the support member 6 is cross-shaped, and the four cores 1 are respectively located at the four angles of the support member 6. The support member 6 separates the four cores 1 to ensure the spacing between two adjacent cores 1. The grooves The setting of 601 changes the support member 6 into a cylindrical section and a cross-shaped section. Under the separating effect of the support member 6, the distance between the two adjacent cores 1 is maintained, reducing the mutual interference between the cores. At the same time, the distance between the two adjacent cores 1 is maintained, which facilitates the rapid dissipation of heat generated by the cores 1 during operation. A through hole is provided in the middle of the support member 6, and each groove 601 on the support member 6 is provided with six holes 602 equidistantly distributed circumferentially. The holes 602 are located in the cylindrical section of the support member 6. The setting of the holes 602 provides a torsional space for the cylindrical section on the support member 6, so that the cable can be easily twisted within a certain range during use, providing room for movement.

[0023] like Figure 2-Figure 4 As shown, a reinforcing rib 7 is provided in the through hole of the support member 6, and there is a gap between the support member 6 and the reinforcing rib 7. The material of the reinforcing rib 7 is a shape memory polymer, which is used to assist the support member 6 in maintaining the deformed state. When the bending angle of the support member 6 is slightly large, the support member 6 and the reinforcing rib 7 are appropriately deformed and reset in the opposite direction under the action of the elastic restoring force generated by the deformation of the support member 6. A plurality of evenly distributed elastic rings 701 are fixed in the through hole of the support member 6, and the inner side surface of the elastic ring 701 is fixed to the reinforcing rib 7. At the same time, the setting of the reinforcing rib 7 improves the tensile performance of the cable, and the plurality of elastic rings 701 and the plurality of grooves 601 are alternately distributed.

[0024] Specific working principle: On the basis of Example 1, with the setting of the support member 6, the reinforcement rib 7 and the elastic ring 701, the cable is supported by the support member 6 during use, ensuring that the distance between the four cores 1 remains unchanged during the compression process of the cable, reducing the mutual interference between the cores, and improving the working stability of the cable. At the same time, under the setting of the groove 601, the maximum bending angle of the cable is limited to avoid excessive bending of the cable to damage the core 1, and under the setting of the hole 602, it is convenient for the user to twist the cable at a specified angle. When the cable is used in a car charging pile, the twisting operation makes it easy for the user to easily connect the charging gun to the car charging port. At the same time, the setting of the groove 601 and the hole 602 forms a cavity in the cable, reducing the overall weight of the cable. At the same time, the cavity absorbs shock like a spring, further improving the seismic resistance of the cable.

[0025] Example 3: Based on Example 2, Figure 2 、 Figure 5 and Figure 6 As shown, it also includes four elastic sheets 8, which are respectively arranged between two adjacent wire cores 1, and the elastic sheets 8 are in contact with the support member 6 and the adjacent filling layer 2. The four elastic sheets 8 are all provided with a card slot, and both ends of the filling layer 2 are provided with a convex strip. The convex strips of the two adjacent filling layers 2 are used to be installed in the card slots of the corresponding elastic sheets 8. After the four elastic sheets 8 and the four filling layers 2 are assembled, the inner side surfaces of the four elastic sheets 8 are on a circular track, and the circular track is the torsional track of the outer edge of the support member 6, which facilitates the torsional deformation of the support member 6; the elastic sheet 8 is fixed with a plurality of evenly distributed fixing blocks 801, the fixing blocks 801 are located in the corresponding grooves 601, and the inclined surfaces on the left and right sides of the fixing block 801 (with attached Figure 5 For example), the fixing block 801 blocks the corresponding hole 602.

[0026] like Figure 2 and Figure 7 As shown, a fixing frame 9 is fixed to the outside of each wire core 1. The fixing frame 9 consists of two parts. The fixing frame 9 is made of elastic material, and the elastic coefficient of the fixing frame 9 is greater than the elastic coefficient of the filling layer 2 and the elastic coefficient of the elastic sheet 8. The outer edge of the cross section of the fixing frame 9 is a regular hexagon. The filling layer 2, the support member 6, the elastic sheet 8 and the fixing block 801 are respectively in contact with adjacent fixing frames 9. The fixing frame 9 is provided with a plurality of evenly distributed chambers 901. The outer width of the chamber 901 is greater than its inner width, which is used to improve its anti-extrusion ability while reducing its weight.

[0027] Specific working principle: During the cable assembly operation, four fixed frames 9 are first installed on the outside of the four wire cores 1, and then the four fixed frames 9 are placed at the four corners of the support 6. Then, four elastic sheets 8 are placed between two adjacent fixed frames 9, and four filling layers 2 are wrapped on the outside of the four fixed frames 9, and the convex strips of the filling layer 2 are stuck in the grooves of the adjacent elastic sheets 8, so that the components of the cable are pre-connected, and then the braided layer 3 is wound and the protective layer 4 is wrapped. The quick connection between the filling layer 2 and the elastic sheet 8 in the above assembly process improves the assembly efficiency of the cable.

[0028] Example 4: Based on Example 3, Figure 2 and Figure 8As shown, it also includes a plurality of evenly distributed fixing columns 10. The fixing columns 10 located on the same cross section of the protective layer 4 are a group. The number of the fixing columns 10 in this group is eight fixing columns 10 distributed circumferentially and evenly. The fixing columns 10 are embedded in the adjacent filling layer 2. The outer ends of each group of fixing columns 10 are set to a cone shape to facilitate the fixing columns 10 to penetrate the braided layer 3. The fixing columns 10 are inserted into the protective layer 4, and the fixing columns 10 are located directly below the protrusion 5. The braided layer 3 is spirally cross-woven.

[0029] Specific working principle: After the cable is assembled, when the cable is subjected to axial tensile force, the protective layer 4 is deformed under the action of the tensile force (possibly accompanied by circumferential contraction), wherein the deformation of the protective layer 4 is caused by squeezing the braided layer 3 through the fixed column 10. Since the braided layer 3 is spirally cross-woven, the braided layer 3 is stretched and contracts circumferentially, thereby achieving uniform distribution of tensile stress on the entire cable and improving the tensile performance and structural stability of the cable.

[0030] It should be noted that the above preferred embodiments are merely illustrative of the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit and essence of the present invention are intended to be encompassed within the scope of protection of the present invention.

Claims

1. A seismic and corrosion-resistant polyethylene new energy cable, characterized in that: The invention comprises four wire cores (1), wherein the outer surface of the wire cores (1) is provided with a polyethylene insulation layer, the four wire cores (1) are circumferentially equidistantly distributed, the outer sides of the four wire cores (1) are wrapped with four filling layers (2) circumferentially equidistantly distributed, the outer sides of the four filling layers (2) are wrapped with a braided layer (3), the outer side of the braided layer (3) is fixed with a protective layer (4), and the protective layer (4) is composed of 85% of a high-density polyethylene matrix and 15% of a perfluoropolyether elastomer; The outer side surface of the protective layer (4) is fixed with a plurality of evenly distributed protrusions (5), the protrusions (5) are hemispherical, and the tangent line between two adjacent protrusions (5) in the circumferential direction is located outside the protective layer (4), the protrusions (5) are made of elastic material, and the elastic coefficient of the protrusions (5) is smaller than the elastic coefficient of the protective layer (4).

2. The earthquake-resistant and corrosion-resistant polyethylene new energy cable according to claim 1, characterized in that: A support member (6) is fixedly connected between the four wire cores (1); the support member (6) is made of elastic material; the support member (6) is provided with a plurality of evenly distributed grooves (601); the grooves (601) are used to provide a bending range for the support member (6).

3. The earthquake-resistant and corrosion-resistant polyethylene new energy cable according to claim 2, characterized in that: The cross section of the support member (6) is cross-shaped, and the four wire cores (1) are respectively located at four angles of the support member (6). The support member (6) separates the four wire cores (1) to ensure the spacing between two adjacent wire cores (1).

4. The earthquake-resistant and corrosion-resistant polyethylene new energy cable according to claim 2, characterized in that: A through hole is provided in the middle of the support member (6), and a plurality of holes (602) equidistantly distributed in the circumferential direction are provided in the groove (601) of the support member (6), and the holes (602) are used to provide space for the circumferential torsion of the support member (6).

5. The earthquake-resistant and corrosion-resistant polyethylene new energy cable according to claim 4, characterized in that: A reinforcing rib (7) is provided in the through hole of the support member (6); the material of the reinforcing rib (7) is a shape memory polymer, and is used to assist the support member (6) in maintaining a deformed state.

6. The earthquake-resistant and corrosion-resistant polyethylene new energy cable according to claim 5, characterized in that: There is a gap between the support member (6) and the reinforcing rib (7), a plurality of evenly distributed elastic rings (701) are fixedly connected in the through hole of the support member (6), the inner side surfaces of the elastic rings (701) are fixedly connected to the reinforcing rib (7), and the plurality of elastic rings (701) and the plurality of grooves (601) are alternately distributed.

7. The earthquake-resistant and corrosion-resistant polyethylene new energy cable according to claim 2, characterized in that: It also includes four elastic sheets (8), the four elastic sheets (8) are respectively arranged between two adjacent wire cores (1), and the elastic sheets (8) are in contact with the support member (6) and the adjacent filling layer (2), the elastic sheet (8) is provided with a card slot, and the filling layer (2) is provided with a convex strip, and the convex strips of two adjacent filling layers (2) are used to be installed in the card slots of the corresponding elastic sheets (8), and the inner side surfaces of the four elastic sheets (8) are on a circular track, and the circular track is the torsional track of the outer edge of the support member (6).

8. The earthquake-resistant and corrosion-resistant polyethylene new energy cable according to claim 7, characterized in that: The elastic sheet (8) is fixed with a plurality of evenly distributed fixing blocks (801), and the fixing blocks (801) are located in the corresponding grooves (601).

9. The earthquake-resistant and corrosion-resistant polyethylene new energy cable according to claim 8, characterized in that: A fixing frame (9) is fixedly connected to the outside of each of the wire cores (1), and the fixing frame (9) consists of two parts. The outer edge of the cross section of the fixing frame (9) is a regular hexagon. The filling layer (2), the support member (6), the elastic sheet (8) and the fixing block (801) are respectively in contact with adjacent fixing frames (9), and the fixing frame (9) is provided with a plurality of evenly distributed chambers (901).

10. The earthquake-resistant and corrosion-resistant polyethylene new energy cable according to claim 1, characterized in that: It also includes a plurality of evenly distributed fixing columns (10), wherein the fixing columns (10) are embedded in the adjacent filling layers (2), and one end of the fixing columns (10) located outside the filling layers (2) is conical. The fixing columns (10) penetrate the braided layer (3) and are inserted into the protective layer (4), and the braided layer (3) is spirally cross-woven.

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