A wind power generation-resistant twisted flexible cable

Abstract

The present invention relates to the technical field of power equipment, and discloses a torsion-resistant flexible cable for wind power generation, which includes a cold-resistant and torsion-resistant outer covering body. An ethylene-propylene rubber insulating layer sleeve is arranged inside the cold-resistant and torsion-resistant outer covering body, and a torsion-resistant strengthening layer sleeve is arranged inside the ethylene-propylene rubber insulating layer sleeve. The torsion-resistant strengthening layer sleeve includes a copper conductor core group, and a strengthening core group is arranged inside the copper conductor core group; the cold-resistant and torsion-resistant outer covering body includes a polyurethane elastomer sheath and an aramid inner nested sleeve, and the aramid inner nested sleeve is embedded in the inner wall of the polyurethane elastomer sheath and wraps around the outside of the ethylene-propylene rubber insulating layer sleeve. By respectively strengthening the torsion-resistant qualities of the conductor core wire structure, the insulating sleeve structure and the cold-resistant outer sleeve structure, and greatly improving the torsion-resistant quality of the external cold-resistant outer sleeve structure with the largest bearing stress during bending, while improving the torsion-resistant and tensile qualities of the entire cable, the cold-resistant and wear-resistant protection effect of the outer sleeve structure is ensured.

Description

Technical Field

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

[0002] The torsion-resistant cable for wind power generation, namely the wind energy cable, also known as the wind power generation cable, not only needs to meet the performance of ordinary cables, but also has the basic characteristics of being soft and frequently twisted (to adapt to the automatic yaw of the wind turbine to face the wind), having super strong vertical tensile strength (to adapt to the vertical suspension laying of the wind turbine), being resistant to acids, alkalis, salt spray corrosion and seawater corrosion (to adapt to the power connection of offshore wind turbines); and because the wind energy resources are more abundant in high-latitude regions, so more wind turbines are installed in high-latitude regions. And the climate in high-latitude regions is colder and the temperature difference between day and night is larger. Therefore, the wind power generation wind energy cable also needs to have extremely high cold resistance performance.

[0003] The rated voltage of the wind power generation cable is 1.8 / 3 kV and below. The torsion-resistant flexible cable for wind power generation is applicable to the power transmission and electrical control of grid-connected wind turbine generator sets, and is particularly suitable for installation at special parts between the nacelle and the tower barrel that need to withstand frequent twisting requirements, and is mainly used for the power transmission between the stator winding and the rotor winding of the generator to the ground step-up transformer.

[0004] At present, when the existing wind energy cables on the market adopt a torsion-resistant design, although they can adopt a copper alloy material with good torsion resistance and bending resistance in material selection, and can also adopt a more reasonable stranding pitch and untwisting equipment in the manufacturing process according to the working conditions to ensure the uniform tension of the conductor core box and each insulating layer; however, there are the following problems:

[0005] There is a lack of an installation structure at the connection joint part of the cable to reinforce the torsion resistance quality of the joint part; there is a lack of torsion-resistant reinforcement structures for the conductor core wire structure, the insulating sleeve structure and the cold-resistant outer sleeve structure respectively. Especially, the outermost cold-resistant outer sleeve structure bears the greatest stress in the torsion working condition (because it is at the outer diameter, so the outer ring side that bends needs to bear the greatest load). Therefore, the lack of torsion-resistant reinforcement of the outermost cold-resistant outer sleeve structure is more likely to be damaged, thus easily affecting its function of protecting the whole cable against cold and abrasion. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a torsion-resistant flexible cable for wind power generation, which solves the problems put forward in the above background art.

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

[0008] A wind power generation-resistant twisted flexible cable includes a cold-resistant and torsion-resistant outer covering body. An ethylene propylene rubber insulating layer sleeve is arranged inside the cold-resistant and torsion-resistant outer covering body. A torsion-resistant strengthening layer sleeve is arranged inside the ethylene propylene rubber insulating layer sleeve. The torsion-resistant strengthening layer sleeve includes a copper conductor core group, and a strengthening core group is arranged inside the copper conductor core group;

[0009] The cold-resistant and torsion-resistant outer covering body includes a polyurethane elastomer sheath and an aramid inner nested sleeve. The aramid inner nested sleeve is embedded in the inner wall of the polyurethane elastomer sheath and wraps around the outside of the ethylene propylene rubber insulating layer sleeve.

[0010] The torsion-resistant strengthening layer sleeve includes a non-woven fabric surrounding cloth sleeve and an aramid surrounding cloth sleeve. The non-woven fabric surrounding cloth sleeve evenly surrounds and wraps the surface of the ethylene propylene rubber insulating layer sleeve. The aramid surrounding cloth sleeve evenly surrounds and wraps the surface of the non-woven fabric surrounding cloth sleeve;

[0011] The strengthening core group includes a polyester fiber coating sleeve and a nylon support core rope. The polyester fiber coating sleeve evenly coats the surface of the nylon support core rope, and the copper conductor core group surrounds and coats the outer surface of the polyester fiber coating sleeve.

[0012] Preferably, a three-core ethylene propylene rubber insulating layer sleeve for sleeving the torsion-resistant strengthening layer sleeve is arranged inside the cold-resistant and torsion-resistant outer covering body. Three groups of torsion-resistant strengthening layer sleeves, copper conductor core groups, and strengthening core groups are arranged inside the three-core ethylene propylene rubber insulating layer sleeve, and the three groups of torsion-resistant strengthening layer sleeves, copper conductor core groups, and strengthening core groups are evenly distributed in a circumferential shape with the center inside the three-core ethylene propylene rubber insulating layer sleeve as the axis.

[0013] Preferably, a four-core ethylene propylene rubber insulating layer sleeve for sleeving the torsion-resistant strengthening layer sleeve is arranged inside the cold-resistant and torsion-resistant outer covering body. Four groups of torsion-resistant strengthening layer sleeves, copper conductor core groups, and strengthening core groups are arranged inside the four-core ethylene propylene rubber insulating layer sleeve, and the four groups of torsion-resistant strengthening layer sleeves, copper conductor core groups, and strengthening core groups are evenly distributed in a circumferential shape with the center inside the four-core ethylene propylene rubber insulating layer sleeve as the axis.

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

[0015] Preferably, the copper conductor core group is composed of multiple adjacent stranded wires, and the adjacent stranded layers of the multiple wires adopt the same stranding 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. For the wind power generation-resistant twisted flexible cable, by arranging a reinforcing core group composed of a polyester fiber coating sleeve and a nylon support core rope inside the conductor structure - the copper conductor core group, and making the reinforcing core group the central member of the reinforcing core of the high-strength elastomer, the center of the whole cable is strengthened, and the stress of the conductor is relieved;

[0023] 2. For the wind power generation-resistant twisted flexible cable, the aramid winding cloth sleeve cooperates with the non-woven fabric winding cloth sleeve as a high-strength fiber material, so that the insulation structure can effectively resist the stress generated during the twisting process of the cable;

[0024] 3. For the wind power generation-resistant twisted flexible cable, and the aramid inner nesting is fully attached to the inner wall of the polyurethane elastomer sheath, which improves the tensile and bend-resistant quality of the cold-resistant and torsion-resistant outer covering sleeve, avoids damage, and greatly ensures the cold-proof and wear-resistant protection of the outermost part of the cable;

[0025] 4. For the wind power generation-resistant twisted flexible cable, by arranging a connector loading plate frame and a rigid connecting sleeve to clamp, wrap and fasten the welded connecting pipe, the joint end protection ferrule can be sleeved on two overlapping rigid connecting sleeves and screwed in for fixation, so that the joint end protection ferrule and the cable torsion buffer protection ring can support the part of the cable near the joint, avoid excessive torsion and bending, avoid cable fatigue, and ensure the torsion-resistant quality and effective service life of the cable.

[0026] In summary, the present invention strengthens the torsion-resistant quality of the joint part by adding an installation structure to the connection joint part of the cable, and improves the torsion-resistant quality after installation of the joint part; by strengthening the torsion-resistant quality of the conductor core wire structure, the insulation sleeve structure and the cold-resistant outer sleeve structure respectively, and greatly improving the torsion-resistant quality of the outermost cold-resistant outer sleeve structure with the largest bearing stress during bending, while improving the torsion-resistant and tensile qualities of the whole cable, the cold-proof and wear-resistant protection effect of the outer sleeve structure is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0028] Figure 2 is a three-dimensional view of the cold-resistant and torsion-resistant outer covering sleeve of the present invention;

[0029] Figure 3 is a three-dimensional view of the torsion-resistant reinforcement layer sleeve of the present invention;

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

[0031] Figure 5 is another three-dimensional view of the structure of the present invention;

[0032] Figure 6Another three-dimensional view of the structure of the present invention;

[0033] Figure 7 Another three-dimensional view of the structure of the present invention;

[0034] Figure 8 Dissected three-dimensional view of the structure of the present invention;

[0035] Figure 9 Internal schematic diagram of a part of the structure of the present invention.

[0036] In the figure: 1, cold-resistant and torsion-resistant outer covering body; 2, ethylene propylene rubber insulation layer sleeve; 3, torsion-resistant strengthening layer sleeve; 4, copper conductor core group; 5, polyester fiber coating sleeve; 6, nylon support core rope; 7, three-core ethylene propylene rubber insulation layer sleeve; 8, four-core ethylene propylene rubber insulation layer sleeve; 9, welding connection pipe; 10, connector ethylene propylene rubber insulation gasket; 11, connector isolation shielding gasket; 12, connector loading plate frame; 13, connector assembly bolt; 14, installation support plate frame; 15, rigid connection sleeve; 16, joint end protection bucket hoop; 17, cable torsion buffer protection ring; 18, support bucket ring frame;

[0037] 101, polyurethane elastomer sheath; 102, aramid inner nested sleeve; 301, aramid wrapped cloth sleeve; 302, non-woven fabric wrapped cloth sleeve; 1201, connector loading plate piece; 1202, connector loading through hole; 1401, installation support plate body; 1402, installation bearing hole. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] Refer to Figures 1 to 4 , a torsion-resistant flexible cable for wind power generation, including a cold-resistant and torsion-resistant outer covering body 1. An ethylene propylene rubber insulation layer sleeve 2 is arranged inside the cold-resistant and torsion-resistant outer covering body 1. A torsion-resistant strengthening layer sleeve 3 is arranged inside the ethylene propylene rubber insulation layer sleeve 2. The torsion-resistant strengthening layer sleeve 3 includes 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 covering body 1 includes a polyurethane elastomer sheath 101 and an aramid inner nested sleeve 102. The aramid inner nested sleeve 102 is embedded in the inner wall of the polyurethane elastomer sheath 101 and wraps around the outside of the ethylene propylene rubber insulation layer sleeve 2.

[0041] The twist-resistant reinforcement layer sleeve 3 includes a non-woven fabric surrounding sleeve 302 and an aramid surrounding sleeve 301. The non-woven fabric surrounding sleeve 302 is evenly wound around the surface of the ethylene-propylene rubber insulating layer sleeve body 2, and the aramid surrounding sleeve 301 is evenly wound around the surface of the non-woven fabric surrounding sleeve 302;

[0042] The reinforcing core group includes a polyester fiber coated sleeve body 5 and a nylon support core rope 6. The polyester fiber coated sleeve body 5 is evenly coated on the surface of the nylon support core rope 6, and the copper conductor core group 4 is wound around the outer surface of the polyester fiber coated sleeve body 5.

[0043] In the present invention, the copper conductor core group 4 uses a copper alloy wire, and the conductor material sampled by the copper conductor core group 4 is a Fe-In-Zr-Cu alloy soft wire, an In-Sn-Cu alloy soft wire, a Class 5 or Class 6 tinned soft copper wire.

[0044] More specifically, by setting the conductor material sampled by the copper conductor core group 4 to use materials such as Fe-In-Zr-Cu alloy soft wire, In-Sn-Cu alloy soft wire, Class 5 or Class 6 tinned soft copper wire, the copper conductor core group 4 itself has relatively excellent twist resistance and bending resistance.

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

[0046] More specifically, by adopting a plurality of adjacent stranded wires with the same stranding direction in the stranded layer and making the pitch circle diameter ratio equal to the square of the pitch length ratio, the relative displacement between the stranded layers can be greatly reduced, preventing the wires from loosening, bulging or breaking, and further improving the twist resistance quality and stability of the cable core structure - the conductor core part.

[0047] In the present invention, both the non-woven fabric surrounding sleeve 302 and the aramid surrounding sleeve 301 are wound and wrapped around the periphery of the copper conductor core group 4 in a spiral shape in an inclined manner in sequence along a straight belt, and the non-woven fabric surrounding sleeve 302 and the aramid surrounding sleeve 301 are wound and wrapped on the entire surface without gaps.

[0048] More specifically, by using the non-woven fabric surrounding sleeve 302 to be wound and wrapped with the copper conductor core group 4 first, the insulation and shielding effects can be further improved; and by using the aramid surrounding sleeve 301 for wrapping and winding, the strength and twist resistance of the cable can be greatly increased.

[0049] In the present invention, the nylon support core rope 6 functions to provide internal support for the polyester fiber coated sleeve body 5 to achieve a surrounding state, and the polyester fiber coated sleeve body 5 functions to improve the overall tensile support of the cable.

[0050] More specifically, a polyester fiber coated sleeve 5 is provided to wrap around a nylon support core rope 6 as a reinforcing core at the center of the copper conductor core group 4, making it a high-strength elastomer center member, relieving the stress on the copper conductor core group 4, improving the tensile strength quality of the entire cable, and greatly avoiding the risk of fracture under the working conditions of twisting and stretching.

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

[0052] More specifically, by setting the aramid inner nesting 102 made of aramid braided layer material to adhere to the entire inner wall surface of the polyurethane elastomer sheath 101, the cold-resistant wrapping material outside the cable also realizes the improvement of the anti-twisting quality, avoiding the fracture of the cold-resistant structure outside the cable under the working conditions of twisting and stretching and affecting the cold protection of the internal structure.

[0053] Refer to Figures 1 to 5 , the difference in the embodiment is:

[0054] Inside the cold-resistant and anti-twisting outer sheath 1, there is a three-core ethylene propylene rubber insulating layer sleeve 7 that sleeves the anti-twisting strengthening layer sleeve 3. Inside the three-core ethylene propylene rubber insulating layer sleeve 7, there are three groups of anti-twisting strengthening layer sleeves 3, copper conductor core groups 4, and reinforcing core groups, and these three groups of anti-twisting strengthening layer sleeves 3, copper conductor core groups 4, and reinforcing core groups are distributed in an equidistant circular pattern around the center of the three-core ethylene propylene rubber insulating layer sleeve 7.

[0055] More specifically; by setting the three-core ethylene propylene rubber insulating layer sleeve 7 to provide support for three groups of conductor structures, while expanding the conductor core structure, it can avoid affecting the anti-twisting and tensile structure designs, and can expand the core structure of the cable while ensuring the anti-twisting quality, expanding the scope of application.

[0056] Refer to Figures 1 to 4 and Figure 6 , the difference in this embodiment is:

[0057] Inside the cold-resistant and anti-twisting outer sheath 1, there is a four-core ethylene propylene rubber insulating layer sleeve 8 that sleeves the anti-twisting strengthening layer sleeve 3. Inside the four-core ethylene propylene rubber insulating layer sleeve 8, there are four groups of anti-twisting strengthening layer sleeves 3, copper conductor core groups 4, and reinforcing core groups, and these four groups of anti-twisting strengthening layer sleeves 3, copper conductor core groups 4, and reinforcing core groups are distributed in an equidistant circular pattern around the center of the four-core ethylene propylene rubber insulating layer sleeve 8.

[0058] More specifically; by setting the four-core ethylene propylene rubber insulating layer sleeve 8 to provide support for four groups of conductor structures, while expanding the conductor core structure, it can avoid affecting the anti-twisting and tensile structure designs, and can expand the core structure of the cable while ensuring the anti-twisting quality, expanding the scope of application.

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

[0060] In the present invention, a welding connection pipe 9 is welded between the ends of the copper conductor core group 4 and the ends of another copper conductor core group 4. A rigid connection sleeve 15, a connection head ethylene propylene rubber insulating gasket 10, and a connection head isolation shielding gasket 11 are fixedly sleeved on the surface of the welding connection pipe 9 and the surface of the copper conductor core group 4 near its end. The connection head isolation shielding gasket 11 is arranged on the inner wall of the connection head ethylene propylene rubber insulating gasket 10, and the connection head ethylene propylene rubber insulating gasket 10 is arranged on the inner wall of the rigid connection sleeve 15. The inner walls of the connection head ethylene propylene rubber insulating gasket 10 and the connection head isolation shielding gasket 11 wrap the surfaces of the copper conductor core group 4 and the welding connection pipe 9. Connection head loading plate frames 12 are fixedly installed in the middle of the top edge and the bottom edge of the rigid connection sleeve 15. The connection head loading plate frames 12 are connected with connection head assembly bolts 13. An installation support plate frame 14 is fixedly installed in the middle of the outer surface of the rigid connection sleeve 15. A joint end protection ferrule 16 is threadedly sleeved on the end of the rigid connection sleeve 15. One end of the joint end protection ferrule 16 away from the rigid connection sleeve 15 is fixedly installed with a cable torsion buffer protection ring 17. A support ferrule frame 18 is fixedly installed on the outer edge of the cable torsion buffer protection ring 17 and the outer surface of the joint end protection ferrule 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 the wind energy cable due to its firm connection, small resistance, etc. However, because the connection part of the welded connector is rigid, after the connection head part is fixed, the core structure of the cable near the connection head part - the copper conductor core group 4 is prone to the problem of decreased resistance to torsional load quality. The present invention installs a protection structure on the surface of the welded connector - the welding connection pipe 9, that is, a rigid connection sleeve 15 lined with a connection head ethylene propylene rubber insulating gasket 10 and a connection head isolation shielding gasket 11 is used to wrap and assemble the outside of the welding connection pipe 9. Then, a joint end protection ferrule 16 connected by an end bolt is used to connect the two rigid connection sleeves 15 and strengthen the fastening of the end. The convex arc surface of the cable torsion buffer protection ring 17 fixed to the inner side of the round bucket shape of the joint end protection ferrule 16 and its end provides a buffer for the torsional bending of the part of the cable near the joint, avoiding excessive bending of the part of the overall cable near the joint, thereby ensuring the torsional resistance and bending resistance performance 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 text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0067] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. 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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