Warp-resistant flexible cable for wind power generation

Abstract

The invention relates to the technical field of power equipment, and discloses a wind power generation torsion-resistant flexible cable, which comprises a cold-resistant torsion-resistant outer covering sleeve body, an ethylene propylene rubber insulating layer sleeve body is arranged in the cold-resistant torsion-resistant outer covering sleeve body, a torsion-resistant reinforced layer sleeve is arranged in the ethylene propylene rubber insulating layer sleeve body, and the torsion-resistant reinforced layer sleeve comprises a copper conductor core body group. A reinforcing core body group is arranged in the copper conductor core body group; the cold-resistant torsion-resistant outer covering sleeve body comprises a polyurethane elastomer sheath and an aramid fiber embedded sleeve, and the aramid fiber embedded sleeve is embedded in the inner wall of the polyurethane elastomer sheath and wraps the ethylene propylene rubber insulating layer sleeve body. The torsion-resistant quality of the guide core wire structure, the insulation sleeve structure and the cold-resistant outer sleeve structure is reinforced, and the torsion-resistant quality of the outer cold-resistant outer sleeve structure with the largest bearing stress during bending is greatly improved, so that the torsion-resistant and tensile quality of the whole cable is improved, and the cold-proof and wear-resistant protection effects of the outer sleeve structure are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of electric power equipment, and in particular to a torsion-resistant flexible cable for wind power generation. Background Art

[0002] The twist-resistant cable for wind power generation is the wind power cable, which can also be called wind power cable. It must not only meet the performance of ordinary cables, but also have the basic characteristics of soft and frequent torsion (to adapt to the automatic yaw of wind turbines to the wind), super vertical tensile strength (to adapt to the vertical suspension of wind turbines), acid and alkali resistance, salt spray corrosion resistance, that is, seawater corrosion resistance (to adapt to the power connection of offshore wind turbines); and because the wind resources in high-latitude regions are more abundant, wind turbines are installed more in high-latitude regions, and the climate in high-latitude regions is colder, and the temperature difference between day and night is larger. Therefore, wind power cables for wind power generation also need to have extremely high cold resistance.

[0003] The rated voltage of wind power cables is 1.8 / 3kV and below. The torsion-resistant soft cables for wind power generation are suitable for power transmission and electrical control of grid-connected wind turbines. They are particularly suitable for installation in special parts that need to withstand frequent torsion requirements between the nacelle and the tower. They are mainly used for power transmission between the stator winding and rotor winding of the generator and the ground step-up transformer.

[0004] At present, the existing wind power cables on the market adopt the twisting resistance design. Although the copper alloy with good twisting and bending resistance can be selected in the material selection, and more reasonable twisting pitch and back-twisting equipment can be used in the manufacturing process according to the working conditions to ensure the uniform tension of each insulation layer of the core box; however, there are the following problems:

[0005] There is a lack of installation structure at the connecting joint of the cable to reinforce the torsional resistance of the joint; there is a lack of torsional reinforcement structures for the core wire structure, insulating sleeve structure and cold-resistant jacket structure respectively, especially the outermost cold-resistant jacket structure bears the greatest stress under torsional conditions (because it is on the outer diameter, the outer ring side of the bend requires the greatest load when bending), so the outermost cold-resistant jacket structure lacks torsional reinforcement and is more susceptible to damage, which can easily affect its cold-proof and wear-resistant effect on the entire cable. Summary of the invention

[0006] In view of the deficiencies of the prior art, the present invention provides a torsion-resistant flexible cable for wind power generation, which solves the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A torsion-resistant flexible cable for wind power generation, comprising a cold-resistant and torsion-resistant outer sheath, an EPDM rubber insulation layer sheath arranged inside the cold-resistant and torsion-resistant outer sheath, a torsion-resistant reinforcement layer sheath arranged inside the EPDM rubber insulation layer sheath, the torsion-resistant reinforcement layer sheath comprising a copper conductor core group, a reinforcement core group arranged inside the copper conductor core group;

[0009] The cold-resistant and torsion-resistant outer sheath comprises a polyurethane elastomer sheath and an aramid inner nesting, wherein the aramid inner nesting is embedded in the inner wall of the polyurethane elastomer sheath and wrapped around the outside of the ethylene-propylene rubber insulation layer sheath.

[0010] The anti-twisting reinforcement layer sleeve includes a non-woven fabric surrounding sleeve and an aramid fabric surrounding sleeve, wherein the non-woven fabric surrounding sleeve is uniformly wrapped around the surface of the EPDM rubber insulation layer sleeve, and the aramid fabric surrounding sleeve is uniformly wrapped around the surface of the non-woven fabric surrounding sleeve;

[0011] The reinforced core group includes a polyester fiber sheath and a nylon supporting core rope, wherein the polyester fiber sheath is evenly coated on the surface of the nylon supporting core rope, and the copper conductor core group surrounds and coats the outer surface of the polyester fiber sheath.

[0012] Preferably, the interior of the cold-resistant and torsion-resistant outer covering sleeve is provided with a three-core EPDM rubber insulation layer sleeve which is sleeved with a torsion-resistant reinforcement layer sleeve, and the interior of the three-core EPDM rubber insulation layer sleeve is provided with three groups of torsion-resistant reinforcement layer sleeves, copper conductor core groups and reinforcement core groups, and the three groups of torsion-resistant reinforcement layer sleeves, copper conductor core groups and reinforcement core groups are distributed in an equidistant and circular shape with the internal center of the three-core EPDM rubber insulation layer sleeve as the axis.

[0013] Preferably, the interior of the cold-resistant and torsion-resistant outer sleeve is provided with a four-core EPDM rubber insulation layer sleeve which is sleeved with a torsion-resistant reinforcement layer sleeve, and the interior of the four-core EPDM rubber insulation layer sleeve is provided with four groups of torsion-resistant reinforcement layer sleeves, copper conductor core groups and reinforcement core groups, and the four groups of torsion-resistant reinforcement layer sleeves, copper conductor core groups and reinforcement core groups are distributed in an equidistant and circular shape with the internal center of the four-core EPDM rubber insulation layer sleeve as the axis.

[0014] Preferably, the copper conductor core group adopts copper alloy wire, and the conductor material sampled by the copper conductor core group is iron indium zirconium copper alloy soft wire, indium tin copper alloy soft wire, or Class I or Class II tinned soft copper wire.

[0015] Preferably, the copper conductor core group is composed of a plurality of adjacent twisted conductors, and the adjacent twisted layers of the plurality of conductors adopt the same twisting direction, and the pitch circle diameter ratio is equal to the square of the pitch length ratio.

[0016] Preferably, the non-woven fabric surrounding cloth sleeve and the aramid surrounding cloth sleeve are both arranged by spirally wrapping and obliquely wrapping along the outer periphery of the copper conductor core group with straight cloth belts, and the non-woven fabric surrounding cloth sleeve and the aramid surrounding cloth sleeve are wrapped and wrapped on the entire surface to avoid gaps.

[0017] Preferably, the nylon supporting core rope serves to provide internal support for the polyester fiber sheathing body to achieve a surrounding state, and the polyester fiber sheathing body serves to improve the tensile support of the entire cable.

[0018] Preferably, the aramid inner nest is an aramid braided layer material, and the aramid inner nest is attached to the entire surface of the inner wall of the polyurethane elastomer sheath.

[0019] Preferably, the end of the copper conductor core group is welded to the end of another copper conductor core group to form a welding connection tube, the surface of the welding connection tube and the surface of the copper conductor core group near its end are fixedly sleeved with a rigid connection sleeve, a connector EPDM rubber insulation pad and a connector isolation shielding pad, the connector isolation shielding pad is arranged on the inner wall of the connector EPDM rubber insulation pad, the connector EPDM rubber insulation pad is arranged on the inner wall of the rigid connection sleeve, the inner wall of the connector EPDM rubber insulation pad and the connector isolation shielding pad is wrapped around the copper conductor core group and the welding connection tube. The surface of the connecting pipe is connected, and a connecting head loading plate frame is fixedly installed in the middle of the top edge and the middle of the bottom edge of the rigid connecting sleeve, and the connecting head loading plate frame is connected to the connecting head assembly bolts, and a mounting support plate frame is fixedly installed in the middle of the outer surface of the rigid connecting sleeve, and a joint end protection bucket hoop is threadedly sleeved on the end of the rigid connecting sleeve surface, and a cable distortion buffer protection ring is fixedly installed on the end of the joint end protection bucket hoop away from the rigid connecting sleeve, and a supporting bucket ring frame is fixedly installed on the outer edge of the cable distortion buffer protection ring and the outer surface of the joint end protection bucket hoop.

[0020] Preferably, the connector loading plate frame includes a connector loading plate and a connector loading through hole, and the connector loading through hole passes through the plate surface opened on the connector loading plate; the mounting support plate frame includes a mounting support plate body and a mounting bearing hole, and the mounting bearing hole passes through the plate surface starting from the mounting support plate body; the joint end protection bucket hoop is an integrated circular hoop sleeve structure, and the internal space of the joint end protection bucket hoop is a circular bucket-shaped empty groove space with one end larger than the other end; the cable distortion buffer protection ring is an integrated circular ring set structure, and the outer surface of the cable distortion buffer protection ring is a convex arc shape; the support bucket ring frame is an integrated circular hoop sleeve structure, and the support bucket ring frame is a circular bucket tube structure.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The torsion-resistant flexible cable for wind power generation has a reinforced core group composed of a polyester fiber sheath and a nylon support core rope arranged inside the conductor structure-copper conductor core group, and the reinforced core group is used as a reinforced core center component of a high-strength elastic body, so that the center of the entire cable is strengthened and the stress of the conductor is relieved;

[0023] 2. The twist-resistant soft cable for wind power generation uses aramid sheath as a high-strength fiber material combined with non-woven sheath, so that the insulation structure can effectively resist the stress generated by the cable during the twisting process;

[0024] 3. The twist-resistant soft cable for wind power generation has an aramid inner nest fully lined on the inner wall of the polyurethane elastomer sheath, which improves the tensile and bending resistance of the cold-resistant and torsion-resistant outer sheath, avoids damage, and greatly ensures the cold-resistant and wear-resistant protection of the outermost part of the cable;

[0025] 4. The torsion-resistant soft cable for wind power generation is clamped, wrapped and fastened with the welded connecting pipe by arranging a connector loading plate frame and a rigid connecting sleeve, so that the joint end protection hoop can be put on the two overlapping rigid connecting sleeves and screwed in and fixed, so that the joint end protection hoop and the cable torsion buffer protection ring can support the part of the cable close to the joint, avoid excessive twisting and bending, avoid cable fatigue, and ensure the torsion resistance and effective service life of the cable.

[0026] In summary, the present invention enhances the torsion resistance of the joint part after installation by adding an installation structure to the connecting joint part of the cable; and enhances the torsion resistance of the core wire structure, the insulating sleeve structure and the cold-resistant jacket structure respectively, and greatly enhances the torsion resistance of the external cold-resistant jacket structure that bears the greatest stress during bending. This improves the torsion resistance and tensile strength of the entire cable, while ensuring the cold-proof and wear-resistant protective effect of the jacket structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional view of the structure of the present invention;

[0028] Figure 2 A three-dimensional view of the cold-resistant and torsion-resistant outer casing of the present invention;

[0029] Figure 3 A three-dimensional view of the twist-resistant strengthening layer sleeve of the present invention;

[0030] Figure 4 This is a three-dimensional view of the copper conductor core assembly of the present invention;

[0031] Figure 5 Another stereoscopic view of the structure of the present invention;

[0032] Figure 6Another stereoscopic view of the structure of the present invention;

[0033] Figure 7 Another stereoscopic view of the structure of the present invention;

[0034] Figure 8 It is a three-dimensional view of the structure of the present invention;

[0035] Fig. 9 It is a schematic diagram of the internal structure of part of the present invention.

[0036] In the figure: 1. Cold-resistant and anti-torsion outer sleeve; 2. EPDM rubber insulation sleeve; 3. Anti-twisting reinforcement sleeve; 4. Copper conductor core group; 5. Polyester fiber sheath; 6. Nylon support core rope; 7. Three-core EPDM rubber insulation sleeve; 8. Four-core EPDM rubber insulation sleeve; 9. Welding connection pipe; 10. Connector EPDM insulation pad; 11. Connector isolation shielding pad; 12. Connector loading plate frame; 13. Connector assembly bolts; 14. Mounting support plate frame; 15. Rigid connection sleeve; 16. Connector end protection bucket hoop; 17. Cable twist buffer protection ring; 18. Support bucket ring frame;

[0037] 101, polyurethane elastomer sheath; 102, aramid inner nesting; 301, aramid surrounding cloth sheath; 302, non-woven surrounding cloth sheath; 1201, connector loading plate; 1202, connector loading through hole; 1401, mounting support plate; 1402, mounting bearing hole. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Reference Figures 1 to 4 A torsion-resistant flexible cable for wind power generation, comprising a cold-resistant and torsion-resistant outer sheath 1, an EPDM rubber insulation layer sheath 2 is arranged inside the cold-resistant and torsion-resistant outer sheath 1, an EPDM rubber insulation layer sheath 2 is arranged inside the EPDM rubber insulation layer sheath 2, and an anti-twist strengthening layer sheath 3 is arranged inside the anti-twist strengthening layer sheath 3, the anti-twist strengthening layer sheath 3 comprises a copper conductor core group 4, and a strengthening core group is arranged inside the copper conductor core group 4;

[0040] The cold-resistant and torsion-resistant outer sheath 1 comprises a polyurethane elastomer sheath 101 and an aramid inner nesting 102 . The aramid inner nesting 102 is embedded in the inner wall of the polyurethane elastomer sheath 101 and wrapped around the outside of the EPDM rubber insulation layer sheath 2 .

[0041] The twist-resistant reinforcement layer sleeve 3 includes a non-woven fabric surrounding sleeve 302 and an aramid fabric surrounding sleeve 301. The non-woven fabric surrounding sleeve 302 is evenly wrapped around the surface of the EPDM rubber insulation layer sleeve 2, and the aramid fabric surrounding sleeve 301 is evenly wrapped around the surface of the non-woven fabric surrounding sleeve 302.

[0042] The reinforced core group includes a polyester fiber sheath 5 and a nylon support core rope 6 . The polyester fiber sheath 5 is evenly coated on the surface of the nylon support core rope 6 , and the copper conductor core group 4 surrounds and coats the outer surface of the polyester fiber sheath 5 .

[0043] In the present invention, the copper conductor core group 4 uses copper alloy wires, and the conductor material sampled from the copper conductor core group 4 is iron indium zirconium copper alloy soft wire, indium tin copper alloy soft wire, or Class 5 or Class 6 tinned soft copper wire.

[0044] More specifically, the conductor material of the copper conductor core group 4 is made of iron-indium-zirconium-copper alloy soft wire, indium-tin-copper alloy soft wire, Category 5 or Category 6 tinned soft copper wire, so that the copper conductor core group 4 itself has better twisting and bending resistance.

[0045] In the present invention, the copper conductor core group 4 is composed of a plurality of adjacent twisted conductors, and the adjacent twisted layers of the plurality of conductors adopt the same twisting direction, and the pitch circle diameter ratio is equal to the square of the pitch length ratio.

[0046] More specifically, by using multiple adjacent twisted conductors with the same twisting direction in the twisted layer and making the pitch circle diameter ratio equal to the square of the pitch length ratio, the relative displacement between the twisted layers can be greatly reduced, preventing the conductors from loosening, bulging or breaking, and further improving the torsion resistance and stability of the cable core structure - the core part.

[0047] In the present invention, both the non-woven fabric surrounding sleeve 302 and the aramid fabric surrounding sleeve 301 are arranged by spirally wrapping and obliquely wrapping along the outer periphery of the copper conductor core group 4 with straight fabric tapes, and the non-woven fabric surrounding sleeve 302 and the aramid fabric surrounding sleeve 301 are wrapped and wrapped on the entire surface to avoid gaps.

[0048] More specifically, the use of the non-woven fabric surrounding cloth sleeve 302 for first wrapping with the copper conductor core group 4 can further improve the insulation and shielding effects; and the use of the aramid surrounding cloth sleeve 301 for wrapping can greatly increase the strength and torsion resistance of the cable.

[0049] In the present invention, the nylon supporting core rope 6 is used to provide internal support for the polyester fiber sheath 5 to achieve a surrounding state, and the polyester fiber sheath 5 is used to improve the tensile support of the entire cable.

[0050] More specifically, a polyester fiber sheathed sleeve 5 is provided to wrap around a nylon supporting core rope 6 as a reinforcing core in the center of the copper conductor core group 4, so that it serves as a high-strength elastomer central component, thereby alleviating the stress on the copper conductor core group 4, improving the tensile strength of the entire cable, and greatly avoiding the risk of breakage under twisting and stretching conditions.

[0051] In the present invention, the aramid inner nesting 102 is an aramid braided layer material, and the aramid inner nesting 102 is attached to the entire surface of the inner wall of the polyurethane elastomer sheath 101 .

[0052] More specifically, by setting the aramid inner nest 102 of the aramid braided layer material to be attached to the entire surface of the inner wall of the polyurethane elastomer sheath 101, the cold-resistant wrapping material on the outside of the cable also achieves improved torsional resistance, avoiding the external cold-resistant structure of the cable from breaking under torsion and stretching conditions and affecting the cold-resistant protection of the internal structure.

[0053] Reference Figures 1 to 5 , the difference of the embodiment is that:

[0054] A three-core EPDM rubber insulation layer sleeve 7 which is sleeved with a torsion-resistant reinforcement layer sleeve 3 is arranged inside the cold-resistant and torsion-resistant outer sleeve 1. Three groups of torsion-resistant reinforcement layer sleeves 3, copper conductor core groups 4 and reinforcement core groups are arranged inside the three-core EPDM rubber insulation layer sleeve 7. The three groups of torsion-resistant reinforcement layer sleeves 3, copper conductor core groups 4 and reinforcement core groups are equidistantly distributed around the center of the three-core EPDM rubber insulation layer sleeve 7.

[0055] More specifically, by setting up a three-core EPDM rubber insulation layer sleeve 7 to provide support for three groups of conductor structures, it is possible to expand the conductor core structure while avoiding the impact on the torsion resistance and tensile structure design. It can expand the core structure of the cable while ensuring the torsion resistance quality, thereby expanding the scope of application.

[0056] Reference Figures 1 to 4 and Figure 6 , the difference of this embodiment is that:

[0057] A four-core EPDM rubber insulation layer sleeve 8 is arranged inside the cold-resistant and torsion-resistant outer sleeve 1, and four groups of torsion-resistant reinforcement layer sleeves 3, copper conductor core groups 4 and reinforcement core groups are arranged inside the four-core EPDM rubber insulation layer sleeve 8. The four groups of torsion-resistant reinforcement layer sleeves 3, copper conductor core groups 4 and reinforcement core groups are equidistantly distributed around the center of the four-core EPDM rubber insulation layer sleeve 8.

[0058] More specifically, by setting up a four-core EPDM rubber insulation layer sleeve 8 to provide support for four groups of conductor structures, it is possible to expand the conductor core structure while avoiding the impact on the torsion resistance and tensile structure design. It can expand the core structure of the cable while ensuring the torsion resistance quality, thereby expanding the scope of application.

[0059] Reference Figures 1 to 4 and Figures 7 to 9 , the difference of this embodiment is that:

[0060] In the present invention, the end of the copper conductor core group 4 is welded to the end of another copper conductor core group 4 and is provided with a welding connection tube 9, the surface of the welding connection tube 9 and the surface of the copper conductor core group 4 near its end are fixedly sleeved with a rigid connection sleeve 15, a connector EPDM rubber insulation pad 10 and a connector isolation shielding pad 11, the connector isolation shielding pad 11 is arranged on the inner wall of the connector EPDM rubber insulation pad 10, the connector EPDM rubber insulation pad 10 is arranged on the inner wall of the rigid connection sleeve 15, the inner wall of the connector EPDM rubber insulation pad 10 and the connector isolation shielding pad 11 are wrapped around the copper conductor core group 4 and the welding connection tube 9, and the surface of the copper conductor core group 4 near its end is fixedly sleeved with a rigid connection sleeve 15, a connector EPDM rubber insulation pad 10 and a connector isolation shielding pad 11. A connecting head loading plate frame 12 is fixedly installed on the surface of the connecting pipe 9, the middle of the top edge and the middle of the bottom edge of the rigid connecting sleeve 15, the connecting head loading plate frame 12 is connected to the connecting head assembly bolts 13, and a mounting support plate frame 14 is fixedly installed in the middle of the outer surface of the rigid connecting sleeve 15, and a joint end protection bucket hoop 16 is threadedly sleeved on the end of the surface of the rigid connecting sleeve 15, and a cable distortion buffer protection ring 17 is fixedly installed on the end of the joint end protection bucket hoop 16 away from the rigid connecting sleeve 15, and a supporting bucket ring frame 18 is fixedly installed on the outer edge of the cable distortion buffer protection ring 17 and the outer surface of the joint end protection bucket hoop 16.

[0061] In this embodiment, when the entire wind power cable is connected, the most suitable welding connection is very suitable for the use environment of wind power cables because of its characteristics of firm connection and low resistance. However, the welding connector is rigid in its connection part, so after the connector part is fixed, the core structure of the entire cable near the connector part - the copper conductor group 4 is prone to the problem of reduced torsional load resistance. The present invention installs a protective structure on the surface of the welding connector - the welding connecting tube 9, that is, a rigid connecting sleeve 15 is used to line the connector EPDM rubber insulating pad 10 and the connector isolation shielding pad 11 to wrap and assemble the outside of the welding connecting tube 9, and then a joint end protection hoop 16 connected by end bolts is provided to connect the two rigid connecting sleeves 15 and strengthen the fastening of the end. The round bucket-shaped inner side of the joint end protection hoop 16 and the convex arc surface of the cable torsion buffer protection ring 17 fixed at its end provide a torsion and bending buffer for the part of the cable near the joint, avoiding excessive bending of the entire cable near the joint, thereby ensuring the torsion and bending resistance of the joint part and achieving the effect of protecting the cable.

[0062] In the present embodiment, by providing a connector loading plate frame 12 and a rigid connecting sleeve 15 to clamp, wrap and buckle the welding connecting pipe 9, the connector end protection hoop 16 can be put on the two overlapping ends of the rigid connecting sleeves 15 and screwed in and fixed spirally, so that the connector end protection hoop 16 and the cable twisting buffer protection ring 17 can support the part of the cable close to the connector, avoid excessive twisting and bending, avoid cable fatigue, and ensure the twisting resistance and effective service life of the cable.

[0063] In the present invention, the connector loading plate frame 12 includes a connector loading plate 1201 and a connector loading through hole 1202, and the connector loading through hole 1202 passes through the plate surface opened on the connector loading plate 1201; the mounting support plate frame 14 includes a mounting support plate body 1401 and a mounting bearing hole 1402, and the mounting bearing hole 1402 passes through the plate surface starting from the mounting support plate body 1401; the joint end protection bucket hoop 16 is an integrated circular hoop sleeve structure, and the internal space of the joint end protection bucket hoop 16 is a circular bucket-shaped empty groove space with one end larger than the other end; the cable twist buffer protection ring 17 is an integrated circular ring set structure, and the outer surface of the cable twist buffer protection ring 17 is a convex arc shape; the support bucket ring frame 18 is an integrated circular hoop sleeve structure, and the support bucket ring frame 18 is a circular bucket tube structure.

[0064] More specifically, by setting the joint end protection bucket hoop 16 as an integrated circular hoop-shaped structure, when it is threadedly sleeved on the ends of the two combined rigid connecting sleeves 15, not only the connection and assembly efficiency of its own structure is improved, but also the two combined rigid connecting sleeves 15 are connected more tightly, thereby improving the stability and strength of the structure.

[0065] Working principle: The cold-resistant and torsion-resistant outer sheath 1 serves as the outermost structure of the entire cable, which improves cold-proof and wear-resistant protection, and the cold-resistant and torsion-resistant outer sheath 1 includes a polyurethane elastomer sheath 101 and an aramid inner nest 102, and the aramid inner nest 102 provides torsion-resistant stress support protection inside the polyurethane elastomer sheath 101; the reinforced core group composed of a polyester fiber sheath 5 and a nylon support core rope 6 is a reinforced core central component of a high-strength elastomer, which is arranged inside the conductor structure-copper conductor core group 4 to provide stress relief for the copper conductor core group 4; the ethylene propylene rubber insulation layer sheath 2 and the torsion-resistant reinforcement layer sheath 3 serve as the insulation part structure, and the torsion-resistant reinforcement layer sheath 3 includes an aramid surrounding cloth sheath 301 and a non-woven surrounding cloth sheath 302, and the aramid surrounding cloth sheath 301 resists the influence of the stress generated by the cable during the torsion process on the insulation part structure.

[0066] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A torsion-resistant flexible cable for wind power generation, characterized in that: The invention comprises a cold-resistant and torsion-resistant outer casing (1), wherein an ethylene-propylene rubber insulation layer casing (2) is arranged inside the cold-resistant and torsion-resistant outer casing (1), wherein a torsion-resistant reinforcement layer casing (3) is arranged inside the ethylene-propylene rubber insulation layer casing (2), wherein the torsion-resistant reinforcement layer casing (3) comprises a copper conductor core group (4), wherein a reinforcement core group is arranged inside the copper conductor core group (4); The cold-resistant and torsion-resistant outer casing (1) comprises a polyurethane elastomer sheath (101) and an aramid inner nest (102), wherein the aramid inner nest (102) is embedded in the inner wall of the polyurethane elastomer sheath (101) and wrapped around the outside of the ethylene-propylene rubber insulation layer casing (2); The twist-resistant reinforcement layer sleeve (3) comprises a non-woven fabric surrounding sleeve (302) and an aramid fabric surrounding sleeve (301), wherein the non-woven fabric surrounding sleeve (302) is uniformly wrapped around the surface of the EPDM rubber insulation layer sleeve (2), and the aramid fabric surrounding sleeve (301) is uniformly wrapped around the surface of the non-woven fabric surrounding sleeve (302); The reinforced core group comprises a polyester fiber sheath (5) and a nylon supporting core rope (6), wherein the polyester fiber sheath (5) is evenly coated on the surface of the nylon supporting core rope (6), and the copper conductor core group (4) is surrounded and coated on the outer surface of the polyester fiber sheath (5).

2. A torsion-resistant flexible cable for wind power generation according to claim 1, characterized in that: The cold-resistant and torsion-resistant outer sheath (1) is provided with a three-core EPDM rubber insulation layer sheath (7) sleeved with a twist-resistant reinforcement layer sheath (3), and the three-core EPDM rubber insulation layer sheath (7) is provided with three groups of twist-resistant reinforcement layer sheaths (3), copper conductor core groups (4) and reinforcement core groups, and the three groups of twist-resistant reinforcement layer sheaths (3), copper conductor core groups (4) and reinforcement core groups are distributed in an equidistant and circumferential shape with the center of the three-core EPDM rubber insulation layer sheath (7) as the axis.

3. A torsion-resistant flexible cable for wind power generation according to claim 2, characterized in that: The cold-resistant and torsion-resistant outer sheath (1) is provided with a four-core EPDM rubber insulation layer sheath (8) sleeved with a twist-resistant reinforcement layer sheath (3), and the four-core EPDM rubber insulation layer sheath (8) is provided with four groups of twist-resistant reinforcement layer sheaths (3), copper conductor core groups (4) and reinforcement core groups, and the four groups of twist-resistant reinforcement layer sheaths (3), copper conductor core groups (4) and reinforcement core groups are distributed in an equidistant and circular shape with the center of the four-core EPDM rubber insulation layer sheath (8) as the axis.

4. A torsion-resistant flexible cable for wind power generation according to claim 3, characterized in that: The end of the copper conductor core group (4) is welded to the end of another copper conductor core group (4) to form a welding connection tube (9); the surface of the welding connection tube (9) and the surface of the copper conductor core group (4) near its end are fixedly sleeved with a rigid connection sleeve (15), a connector EPDM rubber insulation pad (10) and a connector isolation shielding pad (11); the connector isolation shielding pad (11) is arranged on the inner wall of the connector EPDM rubber insulation pad (10); the connector EPDM rubber insulation pad (10) is arranged on the inner wall of the rigid connection sleeve (15); the inner walls of the connector EPDM rubber insulation pad (10) and the connector isolation shielding pad (11) are wrapped around the copper conductor core group (4) and the welding connection tube ( 9), a connector loading plate frame (12) is fixedly installed in the middle of the top edge and the middle of the bottom edge of the rigid connecting sleeve (15), the connector loading plate frame (12) is connected to the connector assembly bolt (13), a mounting support plate frame (14) is fixedly installed in the middle of the outer surface of the rigid connecting sleeve (15), a joint end protection bucket hoop (16) is threadedly sleeved on the end of the surface of the rigid connecting sleeve (15), a cable twist buffer protection ring (17) is fixedly installed at one end of the joint end protection bucket hoop (16) away from the rigid connecting sleeve (15), and a support bucket frame (18) is fixedly installed on the outer edge of the cable twist buffer protection ring (17) and the outer surface of the joint end protection bucket hoop (16).

5. A torsion-resistant flexible cable for wind power generation according to claim 4, characterized in that: The connector loading plate frame (12) comprises a connector loading plate (1201) and a connector loading through hole (1202), wherein the connector loading through hole (1202) penetrates a plate surface opened on the connector loading plate (1201); the mounting support plate frame (14) comprises a mounting support plate body (1401) and a mounting bearing hole (1402), wherein the mounting bearing hole (1402) penetrates a plate surface starting from the mounting support plate body (1401); the joint end protection bucket hoop (16) is an integrated circular hoop sleeve structure, wherein the internal space of the joint end protection bucket hoop (16) is a circular bucket-shaped empty groove space with one end being larger than the other end; the cable twist buffer protection ring (17) is an integrated circular ring sleeve structure, wherein the outer surface of the cable twist buffer protection ring (17) is a convex arc shape; the support bucket ring frame (18) is an integrated circular hoop sleeve structure, wherein the support bucket ring frame (18) is a circular bucket tube structure.

6. A torsion-resistant flexible cable for wind power generation according to claim 5, characterized in that: The copper conductor core group (4) is made of copper alloy conductors.

7. A torsion-resistant flexible cable for wind power generation according to claim 6, characterized in that: The copper conductor core group (4) is composed of a plurality of adjacent twisted conductors, and the adjacent twisted layers of the plurality of conductors adopt the same twisting direction, and the pitch circle diameter ratio is equal to the square of the pitch length ratio.

8. A torsion-resistant flexible cable for wind power generation according to claim 7, characterized in that: The non-woven fabric surrounding cloth sleeve (302) and the aramid fabric surrounding cloth sleeve (301) are both arranged by spirally wrapping and obliquely wrapping along the outer periphery of the copper conductor core group (4) using straight cloth belts, and the non-woven fabric surrounding cloth sleeve (302) and the aramid fabric surrounding cloth sleeve (301) are wrapped and wrapped on the entire surface to avoid gaps.

9. A torsion-resistant flexible cable for wind power generation according to claim 8, characterized in that: The nylon supporting core rope (6) is used to provide internal support for the polyester fiber sheath (5) to achieve a surrounding state, and the polyester fiber sheath (5) is used to improve the tensile support of the entire cable.

10. A torsion-resistant flexible cable for wind power generation according to claim 9, characterized in that: The aramid inner nesting (102) is made of an aramid braided layer material, and the aramid inner nesting (102) is attached to the entire surface of the inner wall of the polyurethane elastomer sheath (101).

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