Cold-resistant and distortion-resistant power cable with copper core and TPE (Thermoplastic Polyurethane Elastomer) insulating sheath for wind power generation

Abstract

The invention discloses a copper core TPE insulating sheath wind power generation cold-resistant distortion-resistant power cable, which belongs to the technical field of power cables, and comprises a plurality of copper cores, TPE insulating layers coated outside the copper cores, filling layers filled in gaps outside the TPE insulating layers, and reinforcing layers coated outside the filling layers, the reinforcing layer is a spirally wound metal reinforcing wire, the cold-resistant layer wraps the outer side of the reinforcing layer, the cold-resistant layer is a cold-resistant elastic polymer containing micro cold-resistant particles, the outer sheath wraps the outer side of the cold-resistant layer, the outer sheath is a weather-resistant TPE, the connecting mechanism is clamped on the outer side of the end part of the outer sheath and is used for connecting two strands of cables, and the cold-resistant layer is a cold-resistant elastic polymer containing micro cold-resistant particles. The power cable solves the problems that an existing power cable is prone to embrittlement and cracking of an insulating layer, damage of a sheath, loosening of an internal structure, complex connection steps, long connection time consumption and poor connection stability, and then stable operation of wind power generation equipment is seriously affected.

Description

Technical Field

[0001] This invention belongs to the field of power cable technology, and particularly relates to a cold-resistant and torsion-resistant power cable with copper core and TPE insulation sheath for wind power generation. Background Technology

[0002] Wind power generation equipment is usually deployed in harsh outdoor environments such as plateaus and polar regions. During its operation, the wind turbine components will frequently twist and sway. As a key component of wind power generation equipment, power cables not only bear the important function of transmitting electrical energy, but also must adapt to complex mechanical motion environments. However, because wind power generation equipment operates under extreme conditions for a long time, extremely high requirements are placed on the performance of cables.

[0003] Existing power cables for wind power generation generally have the following problems:

[0004] 1. Existing power cables used for wind power generation are prone to problems such as insulation embrittlement and cracking, sheath damage, and loosening of internal structure under long-term severe cold and frequent twisting. This will lead to a decrease in the conductivity of the power cable or even short circuit, which will seriously affect the stable operation of the equipment, shorten the cable life and increase maintenance costs.

[0005] 2. The connection steps of existing power cables for wind power generation are relatively complex and time-consuming, which is not conducive to the efficient installation and maintenance of wind power equipment. In addition, their connection stability is poor and they are prone to disconnection, which greatly affects the normal operation of wind power equipment. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention provides a cold-resistant and torsion-resistant power cable for wind power generation with copper core and TPE insulation sheath. It has the advantages of strong cold resistance, high torsion resistance, convenient connection, and good connection stability. It solves the problems of existing power cables being prone to insulation layer embrittlement and cracking, sheath damage, and loosening of internal structure, as well as the complex connection steps, long connection time, and poor connection stability, which seriously affect the stable operation of wind power generation equipment.

[0007] The present invention is implemented as follows: a cold-resistant and torsion-resistant power cable for wind power generation with copper core and TPE insulation sheath, comprising a plurality of copper cores, wherein the copper cores are covered with a TPE insulation layer.

[0008] A filler layer that fills the gaps on the outer side of the TPE insulation layer;

[0009] A reinforcing layer, which covers the outside of the filling layer, is a spirally wound metal reinforcing wire;

[0010] A cold-resistant layer, which covers the outside of the reinforcing layer, is a cold-resistant elastic polymer containing micro-cold-resistant particles;

[0011] Outer sheath, which covers the outside of the cold-resistant layer, is made of weather-resistant TPE;

[0012] A connecting mechanism is clamped on the outer side of the end of the outer sheath and is used to connect two cables.

[0013] As a preferred embodiment of the present invention, the metal reinforcing wire is a tin-plated copper wire, adjacent tin-plated copper wires are closely arranged, and the angle between the spiral winding direction of the tin-plated copper wire and the cable axis is 30-60 degrees.

[0014] As a preferred embodiment of the present invention, the thickness of the cold-resistant layer is 0.5mm-2mm, and micro polyimide particles are uniformly distributed within the cold-resistant layer.

[0015] As a preferred embodiment of the present invention, the filler layer is nitrile rubber with added cold-resistant plasticizer, and a plurality of silicone rubber elastic support strips are provided in the filler layer along the cable axis.

[0016] In a preferred embodiment of the present invention, the connecting mechanism includes a central block, two fixing sleeves are symmetrically fixedly connected to both sides of the central block, a through hole is opened in the interior of the fixing sleeve and the central block, a transition post is fixedly connected to the middle of the through hole, a first fixing component is provided at the end of the fixing sleeve away from the central block, and a second fixing component is provided on the outside of the fixing sleeve.

[0017] As a preferred embodiment of the present invention, the first fixing component includes a plurality of elastic plates uniformly and fixedly connected to one end of the fixing sleeve away from the central block. The inner side of the elastic plate is provided with a plurality of grooves, and the outer side of the elastic plate is provided with an external thread. A threaded sleeve is slidably sleeved on the outer side of the fixing sleeve, and the threaded sleeve can be screwed into the external thread.

[0018] As a preferred embodiment of the present invention, the second fixing component includes a plurality of locking blocks uniformly fixedly connected to the middle of the outer side of the fixing sleeve, a driving sleeve is sleeved on the outer side of the fixing sleeve, the driving sleeve is rotatably connected to one end of the threaded sleeve near the center block, a plurality of locking grooves are uniformly opened on the inner side of the driving sleeve, and the locking blocks are slidably locked in the locking grooves.

[0019] In a preferred embodiment of the present invention, the card block has a sliding hole communicating with the through hole, a fixed insert rod is slidably disposed in the sliding hole, an arc-shaped push plate is fixedly connected to one end of the fixed insert rod away from the central axis of the fixed sleeve, a plurality of limiting posts are fixedly connected to one side of the arc-shaped push plate near the fixed insert rod, a plurality of limiting holes are provided on the card block, the limiting posts are slidably inserted into the limiting holes, a pressure spring is sleeved on the outside of the limiting post, the two ends of the pressure spring are fixedly connected to the arc-shaped push plate and the card block respectively, a driving inclined surface is provided on the side of the card slot away from the central axis of the fixed sleeve, and the arc-shaped surface of the arc-shaped push plate abuts against the driving inclined surface.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. This invention improves low-temperature resistance to embrittlement and freeze-cracking by combining a cold-resistant layer (containing polyimide particles), a filler layer (cold-resistant nitrile rubber), and a weather-resistant TPE outer sheath, making it suitable for extremely cold regions.

[0022] 2. The present invention disperses torsional stress through a spirally wound tin-plated copper wire reinforcement layer, and the silicone rubber elastic support strip and filling material in the filling layer can buffer internal compression, maintain the structural stability of the copper core and TPE insulation layer, and reduce torsional damage.

[0023] 3. Through the close cooperation of each layer, the TPE insulation layer can maintain elasticity and insulation, the filling layer can buffer external force, the reinforcing layer can enhance strength, and the cold-resistant layer and outer sheath can protect the internal structure from the perspectives of cold resistance and weather resistance, respectively, thus extending the service life.

[0024] 4. This invention utilizes threaded sleeves, elastic plates, external threads, and snap-fit ​​patterns to achieve convenient and efficient cable connection, thereby effectively avoiding the problems of complex cable connection steps, long connection time, and poor connection stability that cause wind power generation equipment to fail to operate safely and stably.

[0025] 5. This invention uses a fixed plug to further secure the cable, thereby ensuring the safe and stable operation of the wind power generation equipment. Furthermore, by setting a driving slope, an arc-shaped push plate, and a driving sleeve, synchronous driving of the snap-fit ​​fixing and the fixed plug fixing can be achieved, thereby improving the cable connection effect while avoiding additional operations, so as to further ensure that the cable connection is convenient and time-saving. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the end face structure of a power cable provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of a cable connected by a connecting mechanism according to an embodiment of the present invention;

[0028] Figure 3 This is provided by the embodiments of the present invention. Figure 2 A magnified view of a section at point A in the middle;

[0029] Figure 4 This is a half-sectional view of the connecting mechanism provided in an embodiment of the present invention;

[0030] Figure 5 This is provided by the embodiments of the present invention. Figure 4 A magnified view of a section at point B in the middle;

[0031] Figure 6 This is a full sectional view of the fixed insertion rod provided in an embodiment of the present invention;

[0032] Figure 7 This is provided by the embodiments of the present invention. Figure 6 A magnified view of a section at point C.

[0033] In the diagram: 1. Copper core; 2. TPE insulation layer; 3. Filler layer; 4. Reinforcing layer; 5. Cold-resistant layer; 6. Outer sheath; 7. Silicone rubber elastic support strip; 8. Center block; 9. Fixing sleeve; 10. Through hole; 11. Adapter post; 12. Elastic plate; 13. Thread; 14. External thread; 15. Threaded sleeve; 16. Locking block; 17. Drive sleeve; 18. Slot; 19. Sliding hole; 20. Fixing rod; 21. Arc-shaped push plate; 22. Limiting post; 23. Limiting hole; 24. Pressure spring; 25. Drive inclined surface. Detailed Implementation

[0034] To further understand the invention's content, features, and effects, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0035] The structure of the present invention will now be described in detail with reference to the accompanying drawings.

[0036] refer to Figures 1 to 7 The copper core TPE insulated sheath wind power generation cold-resistant and torsion-resistant power cable provided in this embodiment of the invention includes a plurality of copper cores 1, and the copper cores 1 are covered with a TPE insulation layer 2.

[0037] Filler layer 3, which fills the gaps on the outer side of the TPE insulation layer 2;

[0038] Reinforcing layer 4, which covers the outside of filling layer 3, is a spirally wound metal reinforcing wire;

[0039] Cold-resistant layer 5, which covers the outside of the reinforcing layer 4, is a cold-resistant elastic polymer containing micro cold-resistant particles;

[0040] Outer sheath 6, which covers the outside of the cold-resistant layer 5, is made of weather-resistant TPE;

[0041] A connecting mechanism is clamped on the outer side of the end of the outer sheath 6 and is used to connect two cables.

[0042] Furthermore, the metal reinforcing wire is a tin-plated copper wire, and adjacent tin-plated copper wires are arranged closely together, and the angle between the spiral winding direction of the tin-plated copper wire and the cable axis is 30-60 degrees.

[0043] Furthermore, the thickness of the cold-resistant layer 5 is 0.5mm-2mm, and micro polyimide particles are uniformly distributed within the cold-resistant layer 5.

[0044] Furthermore, the filler layer 3 is nitrile rubber with added cold-resistant plasticizer, and a plurality of silicone rubber elastic support strips 7 are provided in the filler layer 3 along the cable axis.

[0045] In use, under extremely cold conditions, the cold-resistant materials of the cold-resistant layer 5 and the filling layer 3 maintain flexibility to prevent the insulation or sheath from becoming brittle. When twisted, the reinforcing layer 4 disperses stress, and the silicone rubber elastic support strip 7 in the filling layer 3 and the filling material buffer the internal compression, ensuring the structural stability of the copper core 1 and the TPE insulation layer 2, and meeting the long-term stable operation requirements of wind power generation.

[0046] Furthermore, the connecting mechanism includes a central block 8, with two fixing sleeves 9 symmetrically fixedly connected on both sides of the central block 8. The fixing sleeves 9 and the central block 8 are provided with coaxially connected through holes 10. A transition post 11 is fixedly connected to the middle of the through hole 10. A first fixing component is provided at the end of the fixing sleeve 9 away from the central block 8, and a second fixing component is provided on the outside of the fixing sleeve 9.

[0047] In use, first insert the first cable into the through hole 10 from the end of any fixing sleeve 9, and fix the cable with the first fixing component and the second fixing component that cooperate with the fixing sleeve 9. Then insert the second cable into the through hole 10 from the end of the other fixing sleeve 9, and fix it with the first fixing component and the second fixing component in the same way. The ends of the two fixed cables abut against the two ends of the adapter post 11 respectively, and are connected, thereby realizing a quick and stable connection between the two cables. Conversely, by releasing the locking of the first fixing component and the second fixing component, the cable can be taken out.

[0048] Furthermore, the first fixing component includes a plurality of elastic plates 12 uniformly fixedly connected to one end of the fixing sleeve 9 away from the central block 8. The inner side of the elastic plate 12 is provided with a plurality of snap lines 13, and the outer side of the elastic plate 12 is provided with an external thread 14. The outer side of the fixing sleeve 9 is slidably fitted with a threaded sleeve 15, and the threaded sleeve 15 can be screwed into the external thread 14.

[0049] In use, the cable is inserted into the through hole 10 from the center of several elastic plates 12. After the cable end abuts against the adapter post 11, the threaded sleeve 15 is rotated to engage with the external thread 14. During this process, the elastic plate 12 will press the retaining groove 13 into the outer sheath 6 of the cable under the drive of the threaded sleeve 15, thereby fixing the cable. Conversely, if the threaded sleeve 15 is rotated back to the outside of the fixing sleeve 9, the locking of the retaining groove 13 on the cable can be released.

[0050] This setup allows for convenient and efficient cable connection using threaded sleeve 15, elastic plate 12, external thread 14, and retaining 13, effectively avoiding the problems of complex cable connection steps, long connection time, and poor connection stability that prevent wind power generation equipment from operating safely and stably.

[0051] Further, the second fixing component includes a plurality of locking blocks 16 uniformly fixedly connected to the middle of the outer side of the fixing sleeve 9. A driving sleeve 17 is sleeved on the outer side of the fixing sleeve 9. The driving sleeve 17 is rotatably connected to one end of the threaded sleeve 15 near the center block 8. A plurality of locking grooves 18 are uniformly formed on the inner side of the driving sleeve 17. The locking blocks 16 are slidably locked in the locking grooves 18. A sliding hole 19 communicating with the through hole 10 is formed on the locking block 16. A fixing rod 20 is slidably disposed in the sliding hole 19. The fixing rod 20 is away from the central axis of the fixing sleeve 9. An arc-shaped push plate 21 is fixedly connected to one end. Several limiting posts 22 are fixedly connected to the side of the arc-shaped push plate 21 near the fixed insertion rod 20. Several limiting holes 23 are opened on the locking block 16. The limiting posts 22 are slidably inserted into the limiting holes 23. A pressure spring 24 is sleeved on the outside of the limiting post 22. The two ends of the pressure spring 24 are fixedly connected to the arc-shaped push plate 21 and the locking block 16 respectively. A driving inclined surface 25 is provided on the side of the slot 18 away from the central axis of the fixed sleeve 9. The arc-shaped surface of the arc-shaped push plate 21 abuts against the driving inclined surface 25.

[0052] When the threaded sleeve 15 is not engaged with the external thread 14, the arc-shaped push plate 21 abuts against the highest point of the driving inclined surface 25. At this time, the pressure spring 24 is not compressed, and the fixing rod 20 is not inserted into the through hole 10. When the threaded sleeve 15 is rotated and engaged with the external thread 14, the driving sleeve 17 will be driven by the threaded sleeve 15 to move away from the center block 8, but it cannot rotate due to the limiting effect of the locking block 16. During this process, the arc-shaped push plate 21 will compress the pressure spring 24 under the push of the driving inclined surface 25 and push the fixing rod 20 into the outer sheath 6 of the cable. After the threaded sleeve 15 is engaged with the external thread 14 to the limit position, the arc-shaped push plate 21 abuts against the lowest point of the driving inclined surface 25, thereby further fixing the cable by the fixing rod 20. Conversely, if the threaded sleeve 15 is rotated back in the opposite direction, the arc-shaped push plate 21 will reset under the reverse drive of the pressure spring 24, thereby releasing the locking of the cable by the fixing rod 20.

[0053] This setup allows for further securing of the cable using the fixing rod 20, thereby ensuring the safe and stable operation of the wind power generation equipment. Furthermore, by setting up the drive ramp 25, the arc-shaped push plate 21, and the drive sleeve 17, the synchronous drive of the locking pattern 13 and the fixing rod 20 can be achieved, thereby improving the cable connection effect while avoiding additional operations, thus further ensuring convenient and time-saving cable connection.

[0054] Working principle of the invention:

[0055] In use, under extremely cold conditions, the cold-resistant materials of the cold-resistant layer 5 and the filling layer 3 maintain flexibility to prevent the insulation or sheath from becoming brittle. When twisted, the reinforcing layer 4 disperses stress, and the silicone rubber elastic support strip 7 in the filling layer 3 and the filling material buffer the internal compression, ensuring the structural stability of the copper core 1 and the TPE insulation layer 2, and meeting the long-term stable operation requirements of wind power generation.

[0056] When connecting cables, first insert the first cable into the through hole 10 from the end of any fixing sleeve 9, and fix the cable with the first fixing component and the second fixing component that cooperate with the fixing sleeve 9. Then insert the second cable into the through hole 10 from the end of the other fixing sleeve 9, and fix it with the first fixing component and the second fixing component in the same way. The ends of the two fixed cables abut against the two ends of the adapter post 11 respectively, and are connected, thereby realizing a quick and stable connection between the two cables. Conversely, by releasing the locking of the first fixing component and the second fixing component, the cable can be taken out.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A copper core TPE insulated sheathed wind power generation cable resistant to cold and distortion, characterized in that: it comprises a plurality of copper cores (1) which are coated with a TPE insulation layer (2) on the outside; a filling layer (3) which is filled in the gap on the outside of the TPE insulation layer (2); a reinforcing layer (4) which is coated on the outside of the filling layer (3), the reinforcing layer (4) being a spiral-wound metal reinforcing wire; a cold-resistant layer (5) which is coated on the outside of the reinforcing layer (4), the cold-resistant layer (5) being a cold-resistant elastic polymer containing micro cold-resistant particles; an outer sheath (6) which is coated on the outside of the cold-resistant layer (5), the outer sheath (6) being a weather-resistant TPE; and a connecting mechanism which is clamped on the outside of the end of the outer sheath (6) for connecting two cables.

2. The copper core TPE insulated sheathed wind power generation cable resistant to cold and distortion according to claim 1, characterized in that: the metal reinforcing wire is a tin-plated copper wire, the adjacent tin-plated copper wires are arranged closely, and the included angle between the spiral winding direction of the tin-plated copper wire and the cable axial direction is 30-60 degrees.

3. The copper core TPE insulated sheathed wind power generation cable resistant to cold and distortion according to claim 1, characterized in that: the thickness of the cold-resistant layer (5) is 0.5-2 mm, and the micro polyimide particles are uniformly distributed in the cold-resistant layer (5).

4. The copper core TPE insulated sheathed wind power generation cable resistant to cold and distortion according to claim 1, characterized in that: the filling layer (3) is a nitrile rubber with added cold-resistant plasticizer, and a plurality of silicone rubber elastic support strips (7) are arranged along the cable axial direction in the filling layer (3).

5. The copper core TPE insulated sheathed wind power generation cable resistant to cold and distortion according to claim 1, characterized in that: the connecting mechanism comprises a center block (8), two fixed sleeves (9) are symmetrically and fixedly connected on both sides of the center block (8), a through hole (10) coaxially communicating is formed in the fixed sleeve (9) and the center block (8), an adapter column (11) is fixedly connected in the middle of the through hole (10), a first fixing assembly is arranged at the end of the fixed sleeve (9) away from the center block (8), and a second fixing assembly is arranged on the outside of the fixed sleeve (9).

6. The copper core TPE insulated sheathed wind power generation cable resistant to cold and distortion according to claim 5, characterized in that: the first fixing assembly comprises a plurality of elastic plates (12) which are uniformly and fixedly connected at the end of the fixed sleeve (9) away from the center block (8), a plurality of clamping grooves (13) are arranged on the inside of the elastic plate (12), an external thread (14) is formed on the outside of the elastic plate (12), a threaded sleeve (15) is slidably sleeved on the outside of the fixed sleeve (9), and the threaded sleeve (15) can be screwed with the external thread (14).

7. The copper core TPE insulated sheathed wind power generation cable resistant to cold and distortion according to claim 6, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The second fixing assembly comprises a plurality of clamping blocks (16) fixedly connected to the middle part of the outer side of the fixing sleeve (9), a driving sleeve (17) sleeved on the outer side of the fixing sleeve (9), the driving sleeve (17) being rotationally connected to one end of the threaded sleeve (15) close to the center block (8), and a plurality of clamping grooves (18) being uniformly formed in the inner side of the driving sleeve (17), the clamping blocks (16) being slidably clamped in the clamping grooves (18).

8. The severe cold and distortion resistant power cable with copper core, TPE insulation sheath and jacket, and wind power generation application of claim 7, wherein: The clamping block (16) is provided with a sliding hole (19) communicating with the through hole (10), a fixed insertion rod (20) is slidably arranged in the sliding hole (19), one end of the fixed insertion rod (20) away from the center axis of the fixing sleeve (9) is fixedly connected with an arc-shaped push plate (21), a plurality of limiting columns (22) are fixedly connected to one side of the arc-shaped push plate (21) close to the fixed insertion rod (20), a plurality of limiting holes (23) are formed in the clamping block (16), the limiting columns (22) are slidably inserted into the limiting holes (23), a pressure spring (24) is sleeved on the outer side of the limiting column (22), both ends of the pressure spring (24) are fixedly connected with the arc-shaped push plate (21) and the clamping block (16), respectively, a driving inclined surface (25) is arranged on one side of the clamping groove (18) away from the center axis of the fixing sleeve (9), and the arc-shaped surface of the arc-shaped push plate (21) abuts against the driving inclined surface (25).

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