A high-voltage fully shielded wind power tube busbar equipment

Abstract

The present invention discloses a high-voltage fully shielded wind power tube busbar device, which relates to the technical field of wind power generation and electric energy transmission, including a conductive part, including at least two shielding covers connected to the conductive part; a storage frame, which is retractably arranged in the shielding cover, and a plurality of shielding rings are connected to the storage frame, and the plurality of shielding rings are distributed in a linear array with equal spacing along the axis direction of the storage frame; in the present invention, a plurality of shielding covers form a preliminary shield, and with the shielding rings in a linear array in the retractable storage frame, the electric field radiation can be weakened at multiple levels, and the electromagnetic interference to the surrounding equipment can be effectively reduced to ensure its normal operation. The storage frame can be retracted to change the distribution of the shielding rings, such as extending it under high shielding requirements, so that the shielding rings are sparsely distributed, and can accurately compensate for the electric field changes in different spatial positions, adapt to a variety of voltage levels and electromagnetic environments, and improve the electromagnetic compatibility and operation stability of the equipment in different scenarios.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation and electric energy transmission, and in particular to a high-voltage fully shielded wind power tube busbar device. Background Art

[0002] With the continuous development of wind power generation technology, the scale of wind farms is expanding, and the requirements for power transmission equipment are getting higher and higher. In the wind power generation system, electric energy needs to be efficiently and stably transmitted from the wind turbine to the substation or other power-consuming equipment. In the field of wind power, wind power tube busbar equipment has been partially applied to power transmission in the tower. However, this existing wind power tube busbar equipment adopts ordinary low-voltage insulation because the insulation of the tube busbar itself, the connection insulation between the tube busbars, and the connection insulation between the tube busbars and the cables all use ordinary low-voltage insulation methods. When the voltage is higher than 3kV, the induced voltage on the surface of the busbar is much higher than the safety voltage for the human body, which poses a great safety hazard and can no longer meet the requirements of high-voltage power transmission of large-capacity wind turbines. At present, land-based wind power has developed towards sea-based wind power on a large scale. The capacity of wind turbines is getting larger and larger, and the voltage level of power transmission is getting higher and higher. The common mode voltage on the converter side has reached 5kV.

[0003] The existing Chinese patent (publication number: CN215496149U) is a high-voltage fully shielded wind power tube busbar equipment for large-capacity wind turbines, including a wind power tube busbar and a shielding tube; the wind power tube busbar and the shielding tube are all capacitive insulation. The wind power tube busbar includes a first wind power tube busbar and a second wind power tube busbar, and the shielding tube includes a first terminal shielding tube, a second terminal shielding tube, and an intermediate shielding tube; the connection insulation between the first wind power tube busbar and the second wind power tube busbar is achieved through the intermediate shielding tube, and the insulation between the upper end of the first wind power tube busbar and the cable is achieved through the first terminal shielding tube; the insulation between the lower end of the second wind power tube busbar and the cable and the bearing structure is achieved through the second terminal shielding tube. The advantage is that reliable insulation of the wiring at both ends of the busbar and the middle joint is achieved, and the safety and reliability are high.

[0004] During the use of the above-mentioned equipment, the shielding tube can be used to shield the electric field generated by the conductive parts during transportation, thereby reducing the radiation interference of the electric field to the external environment. However, it is not convenient to adjust the shielding force according to the size of the electricity during the shielding process, and the scope of application is small. Summary of the invention

[0005] The object of the present invention is to provide a high-voltage fully shielded wind power pipe busbar device to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides a high-voltage fully shielded wind power tube busbar device, including a conductive member, including:

[0007] Shielding covers, at least two, connected to the conductive member;

[0008] A storage frame is retractably arranged in the shielding cover, and a plurality of shielding rings are connected to the storage frame. The plurality of shielding rings are evenly spaced and arranged in a linear array along the axis direction of the storage frame;

[0009] The transmission gear is rotatably arranged on one side of the shielding cover, and a first connecting rack is meshedly connected to the transmission gear. The other end of the first connecting rack is connected to a limiting clamp block, and one end of the limiting clamp block extends into the shielding cover for limiting the storage frame.

[0010] Furthermore, one side of the shielding cover is connected to a fixed frame, the transmission gear is rotatably connected in the fixed frame, the side of the transmission gear away from the first connecting rack is meshedly connected to a second connecting rack, and one end of the second connecting rack extends to the outside of the fixed frame and is connected to a connecting block.

[0011] Furthermore, a mounting seat is connected to one side of the fixed frame, a limiting column is slidably connected to the mounting seat, one end of the limiting column extends into the connecting block, the other end of the limiting column is connected to a force block, a return spring is sleeved on the limiting column, and both ends of the return spring are respectively connected to the mounting seat and the force block.

[0012] Furthermore, the connection block is provided with a plurality of limiting holes, the limiting holes are matched with the limiting columns, and the plurality of limiting holes are evenly spaced and distributed in a linear array along the length direction of the connection block.

[0013] Furthermore, the first connecting rack and the second connecting rack are both connected with guide blocks at the side away from the transmission gear, and the guide blocks are slidably connected in the fixed frame, and the fixed frame is provided with a sliding groove adapted to the guide blocks.

[0014] Furthermore, an insulating layer is connected to the outer surface of the conductive member.

[0015] Furthermore, a protective cover is clamped on the outer surface of the insulating layer, a connecting ring and a limiting buckle are connected to the protective cover, and the limiting buckle is hung in the connecting ring.

[0016] Furthermore, there are multiple connecting rings and limiting buckles, which are evenly spaced and arranged in a linear array along the length direction of the protective cover.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Multiple shielding covers form a preliminary shield, and with the shielding rings in a linear array in the retractable storage frame, it can weaken the electric field radiation on multiple levels, effectively reduce the electromagnetic interference to the surrounding equipment, and ensure its normal operation. The storage frame can be extended to change the distribution of the shielding rings. For example, when it is extended under high shielding requirements, the shielding rings are sparsely distributed, which can accurately compensate for the changes in the electric field at different spatial positions, adapt to a variety of voltage levels and electromagnetic environments, and improve the electromagnetic compatibility and operation stability of the equipment in different scenarios.

[0019] 2. The transmission gear cooperates with the connecting rack to provide stable power for the storage frame limit operation and ensure the stability of the shielding structure. The transmission components are driven by pulling the connecting block to achieve the limit adjustment of the storage frame. The reset spring cooperates with the limit column to effectively limit the connection block after pulling it to the appropriate position, thereby maintaining the storage frame in the limit state. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the connection structure between the insulating layer and the conductive member of the present invention;

[0022] Figure 3 It is a schematic diagram of the overall structure of the protective layer in the present invention;

[0023] Figure 4 It is a schematic diagram of the connection structure between the transmission gear and the first connecting rack of the present invention;

[0024] Figure 5 For the present invention Figure 1 A magnified view of the structure at center A;

[0025] Figure 6 For the present invention Figure 3 A magnified view of the structure at point B.

[0026] In the figure: 1. conductive part; 201. shielding cover; 202. storage frame; 203. shielding ring; 204. transmission gear; 205. first connecting rack; 206. limiting clamp block; 301. second connecting rack; 302. connecting block; 303. mounting seat; 304. limiting column; 305. force block; 306. reset spring; 4. guide block; 5. insulating layer; 6. protective cover; 7. connecting ring; 8. limiting buckle. DETAILED DESCRIPTION

[0027] 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.

[0028] During use of existing equipment, the shielding tube can be used to shield the electric field generated by the conductive parts during transportation, thereby reducing the radiation interference of the electric field to the external environment. However, during the shielding process, it is not convenient to adjust the shielding force according to the size of the electricity, and the scope of application is small.

[0029] See also Figure 1-6 The present invention provides a technical solution: a high-voltage fully shielded wind power tube busbar device, including a conductive member 1, including:

[0030] Shielding covers 201, at least two, connected to the conductive member 1;

[0031] The storage frame 202 is retractably disposed in the shielding cover 201, and a plurality of shielding rings 203 are connected to the storage frame 202. The plurality of shielding rings 203 are evenly spaced and arranged in a linear array along the axis direction of the storage frame 202;

[0032] The transmission gear 204 is rotatably arranged on one side of the shielding cover 201. The transmission gear 204 is meshed with a first connecting rack 205. The other end of the first connecting rack 205 is connected to a limiting clamp 206. One end of the limiting clamp 206 extends into the shielding cover 201 to limit the storage frame 202.

[0033] During specific implementation, multiple shielding covers 201 are connected to the conductive part 1 to form a preliminary shielding for the conductive part 1, reducing the outward radiation of the electric field. The multiple shielding rings 203 in the storage frame 202 are evenly spaced and arranged in a linear array along its axial direction. When the storage frame 202 is in different telescopic states, these shielding rings 203 can further adjust the shielding effect and range. For example, when the storage frame 202 is extended, the distance between the shielding rings 203 becomes relatively larger, and more accurate shielding compensation can be performed at different spatial positions according to the change of the electric field, so as to adapt to the shielding requirements under different voltage levels or electromagnetic environments. After the conductive part 1 is energized to generate an electric field, the shielding cover 201 and the shielding ring 203 use the principle of electromagnetic induction to induce an opposite electric field, weaken or offset the outward electric field radiation, and prevent electromagnetic interference to surrounding equipment. At the same time, it can also resist the influence of the external electromagnetic field on the power transmission of the conductive part 1. For example, in some working conditions with high shielding requirements, the storage frame 202 is extended to make the shielding rings 203 more sparsely distributed, thereby enhancing the multi-level shielding effect of the electric field;

[0034] The transmission gear 204 is rotatably arranged on one side of the shielding cover 201. When the transmission gear 204 rotates, the first connecting rack 205 meshing with it will produce linear motion. This transmission mode converts rotational motion into linear motion, providing power for the subsequent limiting operation of the storage frame 202.

[0035] See also Figure 4 One side of the shielding cover 201 is connected to a fixed frame, the transmission gear 204 is rotatably connected in the fixed frame, the side of the transmission gear 204 away from the first connecting rack 205 is meshedly connected to the second connecting rack 301, and one end of the second connecting rack 301 extends to the outside of the fixed frame and is connected to a connecting block 302.

[0036] In specific implementation, by pulling the connecting block 302, the second connecting rack 301 can be driven to slide horizontally. During the sliding process, the second connecting rack 301 can drive the transmission gear 204 to rotate, and then the transmission gear 204 can drive the first connecting rack 205 to rotate, so as to facilitate the limiting of the storage frame 202.

[0037] See also Figure 4 A mounting seat 303 is connected to one side of the fixed frame, and a limiting column 304 is slidably connected to the mounting seat 303. One end of the limiting column 304 extends into the connecting block 302, and the other end of the limiting column 304 is connected to a force block 305. A return spring 306 is sleeved on the limiting column 304, and both ends of the return spring 306 are respectively connected to the mounting seat 303 and the force block 305.

[0038] In specific implementation, when the connection block 302 is pulled to a suitable position, the limiting column 304 for pulling can be released. At this time, the return spring 306 can use its own elastic force to drive the limiting column 304 to move vertically downward, thereby limiting the connection block 302.

[0039] See also Figure 4 A plurality of limiting holes are provided on the connection block 302 , and the limiting holes are matched with the limiting posts 304 . The plurality of limiting holes are evenly spaced and arranged in a linear array along the length direction of the connection block 302 .

[0040] In specific implementation, this setting facilitates multiple adjustments to the position of the connection block 302, further improving the adaptation range of the adjustment.

[0041] refer to Figure 4 The first connecting rack 205 and the second connecting rack 301 are both connected with a guide block 4 on one side away from the transmission gear 204. The guide block 4 is slidably connected in the fixed frame, and a sliding groove adapted to the guide block 4 is opened in the fixed frame.

[0042] During specific implementation, the guide block 4 can limit and guide the sliding of the first connecting rack 205 and the second connecting rack 301, further improving the stability of the first connecting rack 205 and the second connecting rack 301 during the sliding process.

[0043] refer to Figure 2 The outer surface of the conductive member 1 is connected with an insulating layer 5 .

[0044] It should be noted that the insulating layer 5 may be made of cross-linked polyethylene XLPE or epoxy resin.

[0045] During specific implementation, the thickness and performance parameters of the insulating layer 5 are precisely set according to the rated voltage level of the equipment, which can effectively prevent current from leaking to the outside, provide reliable electrical insulation performance, prevent electrical accidents caused by insulation breakdown, and ensure the safe and stable operation of the entire wind power system.

[0046] refer to Figure 1 A protective cover 6 is clamped on the outer surface of the insulating layer 5 , a connecting ring 7 and a limiting buckle 8 are connected to the protective cover 6 , and the limiting buckle 8 is hung in the connecting ring 7 .

[0047] It should be noted that the protective cover 6 can be made of materials such as polyvinyl chloride PVC or polyethylene PE.

[0048] During specific implementation, the protective cover 6 is clamped on the outer surface of the insulating layer 5, and its main function is to provide additional mechanical protection for the insulating layer 5. In the operating environment of the wind power tube busbar equipment, it may be affected by various external factors, such as wind, sand, dust, collision, etc. The protective cover 6 can prevent these external objects from directly contacting the insulating layer 5, and prevent the insulating layer 5 from being damaged by mechanical damage and causing the insulation performance to deteriorate. For example, in a wind farm environment with strong wind and sand, the sand particles hit the protective cover 6, and the protective cover 6 bears the impact force, protecting the internal insulating layer 5 from wear and erosion, thereby ensuring the long-term stable insulation effect of the insulating layer 5 and ensuring the safe operation of the equipment;

[0049] The connecting ring 7 and the limiting buckle 8 cooperate with each other to fix the protective cover 6. The limiting buckle 8 is hooked in the connecting ring 7. This connection method is simple and effective. When the protective cover 6 needs to be installed, the limiting buckle 8 is inserted into the connecting ring 7. Through the friction and mutual restraint between the limiting buckle 8 and the connecting ring 7, the protective cover 6 is tightly attached to the insulating layer 5. Compared with other complex fixing methods, this structure is easy to install and disassemble. When the protective cover 6 needs to be replaced or the state of the insulating layer 5 needs to be checked during equipment maintenance or overhaul, the limiting buckle 8 can be easily unhooked from the connecting ring 7 and the protective cover 6 can be removed.

[0050] refer to Figure 6There are multiple connecting rings 7 and limiting buckles 8, and they are evenly spaced and arranged in a linear array along the length direction of the protective cover 6.

[0051] During specific implementation, this arrangement can further improve the stability of the protective cover 6 during use and avoid it from falling off.

[0052] Working principle: Multiple shielding covers 201 are connected to the conductive part 1 to form a preliminary shielding for the conductive part 1 and reduce the outward radiation of the electric field. The multiple shielding rings 203 in the storage frame 202 are evenly spaced and arranged in a linear array along its axial direction. When the storage frame 202 is in different telescopic states, these shielding rings 203 can further adjust the shielding effect and range. For example, when the storage frame 202 is extended, the distance between the shielding rings 203 becomes relatively larger, and more accurate shielding compensation can be performed at different spatial positions according to the change of the electric field to adapt to the shielding requirements under different voltage levels or electromagnetic environments. After the conductive part 1 is energized to generate an electric field, the shielding cover 201 and the shielding ring 203 use the principle of electromagnetic induction to induce an opposite electric field, weaken or offset the outward electric field radiation, and prevent electromagnetic interference to surrounding equipment. At the same time, it can also resist the influence of external electromagnetic fields on the power transmission of the conductive part 1. For example, in some working conditions with high shielding requirements, the storage frame 202 is extended to make the shielding rings 203 more sparsely distributed, thereby enhancing the multi-level shielding effect of the electric field;

[0053] The transmission gear 204 is rotatably disposed on one side of the shielding cover 201. When the transmission gear 204 rotates, the first connecting rack 205 meshing with it will generate linear motion. This transmission method converts the rotational motion into linear motion, providing power for the subsequent limiting operation of the storage frame 202;

[0054] The second connecting rack 301 can be driven to slide horizontally by pulling the connecting block 302. The second connecting rack 301 can drive the transmission gear 204 to rotate during the sliding process, and then the transmission gear 204 can drive the first connecting rack 205 to rotate, so as to limit the storage frame 202.

[0055] When the connection block 302 is pulled to a suitable position, the limiting column 304 for pulling can be released. At this time, the return spring 306 can use its own elastic force to drive the limiting column 304 to move vertically downward, thereby limiting the connection block 302;

[0056] The protective cover 6 is clamped on the outer surface of the insulating layer 5, and its main function is to provide additional mechanical protection for the insulating layer 5. In the operating environment of the wind power tube busbar equipment, it may be affected by various external factors, such as wind, sand, dust, collision, etc.

Claims

1. A high-voltage fully shielded wind power tube busbar device, comprising a conductive member (1), characterized in that: include, At least two shielding covers (201) are connected to the conductive member (1); A storage frame (202) is flexibly arranged in the shielding cover (201), a plurality of shielding rings (203) are connected to the storage frame (202), and the plurality of shielding rings (203) are distributed in a linear array at equal intervals along the axis direction of the storage frame (202); A transmission gear (204) is rotatably arranged on one side of the shielding cover (201); a first connecting rack (205) is meshedly connected to the transmission gear (204); the other end of the first connecting rack (205) is connected to a limiting clamp (206); one end of the limiting clamp (206) extends into the shielding cover (201) and is used to limit the storage frame (202).

2. A high-voltage fully shielded wind power tube busbar device as claimed in claim 1, characterized in that: One side of the shielding cover (201) is connected to a fixed frame, the transmission gear (204) is rotatably connected in the fixed frame, and the side of the transmission gear (204) away from the first connecting rack (205) is meshingly connected to a second connecting rack (301), and one end of the second connecting rack (301) extends to the outside of the fixed frame and is connected to a connecting block (302).

3. A high-voltage fully shielded wind power tube busbar device as claimed in claim 2, characterized in that: One side of the fixed frame is connected to a mounting seat (303), a limiting column (304) is slidably connected to the mounting seat (303), one end of the limiting column (304) extends into the connecting block (302), the other end of the limiting column (304) is connected to a force applying block (305), a return spring (306) is sleeved on the limiting column (304), and two ends of the return spring (306) are respectively connected to the mounting seat (303) and the force applying block (305).

4. A high-voltage fully shielded wind power tube busbar device as claimed in claim 3, characterized in that: The connection block (302) is provided with a plurality of limiting holes, the limiting holes being adapted to the limiting posts (304), and the plurality of limiting holes being distributed in a linear array at equal intervals along the length direction of the connection block (302).

5. A high-voltage fully shielded wind power pipe busbar device as claimed in claim 2, characterized in that: The first connecting rack (205) and the second connecting rack (301) are both connected to a guide block (4) on the side away from the transmission gear (204); the guide block (4) is slidably connected in a fixed frame; a sliding groove matching the guide block (4) is provided in the fixed frame.

6. A high-voltage fully shielded wind power tube busbar device as claimed in claim 1, characterized in that: The outer surface of the conductive member (1) is connected to an insulating layer (5).

7. A high-voltage fully shielded wind power tube busbar device as claimed in claim 6, characterized in that: The outer surface of the insulating layer (5) is clamped with a protective cover (6), and the protective cover (6) is connected with a connecting ring (7) and a limiting buckle (8), and the limiting buckle (8) is hung in the connecting ring (7).

8. A high-voltage fully shielded wind power tube busbar device as claimed in claim 7, characterized in that: The connecting rings (7) and the limiting buckles (8) are in multiple numbers and are evenly spaced and arranged in a linear array along the length direction of the protective cover (6).

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