Grounding device and method for fan foundation construction

Abstract

The invention relates to the technical field of fans, in particular to a fan foundation construction grounding device and method.The fan foundation construction grounding device comprises a pre-buried part and a connecting part, a conical thorn part is fixedly arranged at the lower end of the pre-buried part, an inserting groove is formed in the pre-buried part, and an inserting piece is movably inserted into the inserting groove; the plug-in is connected with the connecting part through a connecting assembly, a connecting piece connected with a grounding wire is arranged on the connecting part, a pressing plate matched with the connecting piece is arranged on the connecting part through a fastener, and a positioning assembly matched with the plug-in is arranged on the embedded part. According to the grounding device, the insertion piece is arranged on the embedded part, the distance between the connecting part and the embedded part is changed by adjusting the depth of the insertion piece inserted into the insertion groove, so that the length of the grounding device is changed, the grounding device adapts to embedded holes with different depths, the grounding device is suitable for various geologies, and the adjusted length is fixed by arranging the positioning assembly.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, and in particular to a grounding device and method for wind turbine foundation construction. Background Technology

[0002] The wind turbine foundation is the fixed end of the wind turbine generator set. Together with the tower, it erects the turbine at a height of 60-100 meters. It is an important component to ensure the normal power generation of the wind turbine. The foundation of the wind turbine generator set is usually a reinforced concrete structure and is designed in different forms according to local geological conditions. It is mainly constructed according to the load of the tower and the climate environment where the unit is located, combined with the construction specifications for high-rise buildings. Onshore wind turbine foundations mainly include spread foundations, ribbed spread foundations, pile foundations, and rock anchor foundations. Spread foundations rely on the self-weight of the foundation and backfill soil to resist large overturning moments; ribbed spread foundations use ribs and slabs to resist cross-sectional moments; pile foundations rely on the interaction force between the piles and the soil to resist the upper load; rock anchor foundations utilize the good bearing capacity of rock to fix the foundation to the rock with high-strength anchors to transfer the load.

[0003] During the construction of existing wind turbine foundations, the wind turbines need to be grounded. This is usually achieved by connecting the wires attached to the wind turbine to the ground, thereby grounding the metal casing of the equipment to prevent personal injury or equipment damage due to short circuits or other faults. The wind turbine grounding wires should be wired according to certain regulations to ensure the safety and reliability of the equipment. Resistance reducing agents are commonly used lightning protection products. As an auxiliary material, they have good properties such as eliminating contact resistance, reducing soil resistivity, and increasing the effective cross-section of the grounding electrode. They are now widely used in grounding projects. Their resistance reducing and corrosion protection performance is stable and effective, playing a vital role in lightning protection and disaster reduction. To facilitate construction, some wind turbines will pre-embed grounding components during foundation construction, thus avoiding secondary construction after the foundation is poured.

[0004] However, in actual construction, due to the influence of the geological environment, the required burial depth of the grounding pre-embedded parts to achieve the required grounding effect varies in different geological environments. Existing grounding devices are difficult to meet the needs of different geological applications, which means that during construction, it is necessary to first drill holes to confirm the depth and then customize grounding devices of appropriate length, which seriously affects the construction schedule. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as difficulty in meeting the needs of different geological conditions, which necessitates drilling to confirm the appropriate depth and then customizing a grounding device of appropriate length during construction, severely impacting the construction schedule. Therefore, this invention proposes a grounding device and method for wind turbine foundation construction.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: Design a grounding device for wind turbine foundation construction, including a pre-embedded part and a connecting part. The lower end of the pre-embedded part is fixedly provided with a conical spike. The pre-embedded part has a slot, and a plug is movably inserted into the slot. The plug is connected to the connecting part through a connecting component. The connecting part is provided with a connector for connecting to a grounding wire. The connecting part is provided with a pressure plate that cooperates with the connector through fasteners. The pre-embedded part is provided with a positioning component that cooperates with the plug.

[0007] Furthermore, the connecting assembly includes a connecting post, which is connected to a mounting base via a disassembly assembly, and the mounting base is connected to the connecting portion via an angle adjustment assembly.

[0008] Furthermore, the disassembly assembly includes two flanges, which are respectively disposed on the mounting base and the connecting column, and the two flanges are connected by fasteners.

[0009] Furthermore, the mounting base is provided with a rotating part, and the angle adjustment assembly includes two connecting plates connected to the rotating part.

[0010] Furthermore, the rotating part has a through hole, and a rotating shaft that is rotatably connected to the through hole is provided between the two connecting plates. A damping structure that cooperates with the rotating shaft is provided in the through hole.

[0011] Furthermore, the damping structure includes a clamping plate and an elastic plate, wherein the clamping plate abuts against the rotating shaft under the action of the elastic plate.

[0012] Furthermore, the positioning component includes a positioning groove formed on the plug-in, and a positioning hole that mates with the positioning groove is formed on the pre-embedded part, and a positioning element that mates with the positioning groove is threaded into the positioning hole.

[0013] Furthermore, a plurality of partitions are fixedly provided in the positioning groove, and the partitions form a stop groove that cooperates with the positioning component.

[0014] Furthermore, the pre-embedded part is provided with an expansion plate, which is spirally wound around the outer wall of the pre-embedded part, and the connecting part is provided with an installation groove that cooperates with the connector.

[0015] A grounding method for wind turbine foundation construction, comprising the aforementioned wind turbine foundation construction device, and further comprising the following steps: S1. Drill pre-embedded holes near the foundation. If it is a rocky area, deep holes need to be drilled and filled with drag-reducing agent. S2. Rotate the positioning component to adjust its position so that the positioning component is released from contact with the inner wall of the positioning groove, thereby releasing the fixation of the plug-in. Adjust the length of the plug-in according to the depth of the pre-embedded hole so that the mounting base is above the ground surface. Place the pre-embedded part of the adjusted grounding device into the pre-embedded hole. S3. Adjust the angle of the connection part according to the location of the pre-embedded hole, the grounding wire, and the wind turbine foundation to facilitate the connection with the grounding wire. Backfill the pre-embedded hole with loess or sand and compact it after reaching the designed thickness. S4. Remove the pressure plate, place the connector connected to the grounding wire into the mounting slot of the connection part, and finally fix the pressure plate back onto the connection part to tighten and secure the connector.

[0016] The grounding device and method for wind turbine foundation construction proposed in this invention have the following advantages: In this invention, by setting a plug on the pre-embedded part and adjusting the depth of the plug insertion into the slot, the distance between the connecting part and the pre-embedded part is changed, thereby changing the length of the grounding device to adapt to pre-embedded holes of different depths, thus making it suitable for various geological conditions. When the geological structure of wind farms in many mountainous and Gobi deserts is rocky, the depth of the pre-embedded hole is increased and the length of the grounding device is increased accordingly, thereby improving the grounding conductivity. Secondly, in this invention, the adjusted length is fixed by setting a positioning component to prevent the grounding device from falling completely into the pre-embedded hole. The connecting part can be replaced by setting a disassembly component to adapt to the required model of connector. At the same time, the connecting part cooperates with the angle adjustment component to adjust the angle of the connecting part, which is convenient for connecting to the grounding wire. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the grounding device for wind turbine foundation construction proposed in this invention; Figure 2 This is a schematic diagram of the structure of the plug-in of the present invention; Figure 3 This is a schematic diagram of the enlarged structure of region A of the present invention; Figure 4 This is a schematic diagram of the enlarged structure of region B of the present invention; Figure 5 This is a schematic diagram of the structure of the expansion plate of the present invention; Figure 6 This is a schematic diagram of the enlarged structure of region C of the present invention.

[0018] In the diagram: 1. Embedded part; 2. Connecting part; 3. Conical part; 4. Insert; 5. Connecting assembly; 51. Connecting column; 52. Disassembly assembly; 521. Flange; 53. Mounting seat; 54. Adjusting assembly; 541. Connecting plate; 542. Rotating shaft; 55. Damping structure; 551. Clamping plate; 552. Elastic plate; 6. Connecting piece; 7. Pressure plate; 8. Positioning assembly; 81. Positioning groove; 82. Positioning piece; 83. Partition part; 9. Expansion plate. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Reference Figure 1-6 A grounding device for wind turbine foundation construction includes a pre-embedded part 1 and a connecting part 2. The lower end of the pre-embedded part 1 is fixedly provided with a conical spike 3 to form a conical structure, reducing the resistance of the grounding device. The pre-embedded part 1 has a slot, and a plug 4 is movably inserted into the slot. The plug 4 is connected to the connecting part 2 through a connecting component 5. The connecting part 2 is provided with a connector 6 that is connected to the grounding wire. The connecting part 2 is provided with a pressure plate 7 that cooperates with the connector 6 through fasteners. The fasteners are bolts. The pre-embedded part 1 is provided with a positioning component 8 that cooperates with the plug 4.

[0021] In this invention, by setting a plug 4 on the pre-embedded part 1, the length of the grounding device can be changed by adjusting the depth of the plug 4 inserted into the slot, adapting to pre-embedded holes of different depths, thus making it suitable for various geological conditions. The adjusted length is fixed by setting a positioning component 8 to prevent the grounding device from falling completely into the pre-embedded hole. The connector 6 is pressed and fixed by a pressure plate 7. When the connector 6 is connected to the ground wire, it is fixed by welding. In this invention, except for the angle adjustment component 54, all parts are made of conductive metal, preferably copper.

[0022] Furthermore, in this embodiment, the connecting component 5 includes a connecting post 51, which is connected to a mounting base 53 via a disassembly component 52. The mounting base 53 is connected to the connecting part 2 via an angle adjustment component 54. By setting the disassembly component 52, the connecting part 2 can be replaced to adapt to the required model of connector. At the same time, the connecting part 2 cooperates with the angle adjustment component 54 to adjust the angle of the connecting part 2, which facilitates connection with the grounding wire.

[0023] In this embodiment, the disassembly assembly 52 includes two flanges 521, which are respectively fixedly mounted on the mounting base 53 and the connecting column 51. The through holes of the two flanges 521 correspond to each other and are connected by fasteners, which are bolt and nut assemblies.

[0024] Furthermore, in this embodiment, the mounting base 53 is provided with a rotating part, and the angle adjustment component 54 includes two connecting plates 541 connected to the rotating part. The two connecting plates 541 are disposed on both sides of the rotating part. The connecting plates 541 are damped and rotatably connected to the rotating part. After the angle adjustment is completed, the angle after rotation can be maintained to a certain extent, which facilitates wiring.

[0025] In this embodiment, a through hole is provided on the rotating part, and a rotating shaft 542 rotatably connected to the through hole is provided between the two connecting plates 541. A damping structure 55 that cooperates with the rotating shaft 542 is provided in the through hole. The rotating shaft 542 is composed of two thinner cylinders and one thicker cylinder. The outer wall of the thicker cylinder is provided with a bearing that is rotatably connected to the inner wall of the through hole. The damping structure 55 rubs against the thinner cylinders of the rotating shaft 542 to generate a certain degree of resistance, so that the angle can be fixed after the angle of the connecting part 2 changes.

[0026] It should be noted that, in this embodiment, the damping structure 55 includes a clamping plate 551 and an elastic plate 552. The clamping plate 551 abuts against the rotating shaft 542 under the action of the elastic plate 552. The clamping plate 551 has an arc-shaped structure, and the concave part contacts the outer wall of the rotating shaft 542 to generate friction. Preferably, it has a semi-circular structure, and its inner wall fits against the outer wall of the rotating shaft 542. When the rotating shaft 542 rotates, it is subjected to resistance. When the resistance is greater than the rotational force on the rotating shaft 542, it cannot rotate, thereby achieving the fixation of the angle. In some embodiments, the contact surface between the clamping plate 551 and the rotating shaft 542 is provided with a friction pad, such as a silicone pad, to increase the friction and thus enhance the damping effect.

[0027] In this embodiment, the positioning component 8 includes a positioning groove 81 formed on the plug-in 4, and a positioning hole formed on the pre-embedded part 1 that cooperates with the positioning groove 81. The positioning hole is internally threaded with a positioning member 82 that cooperates with the positioning groove 81. By rotating the positioning member 82, its position is adjusted so that the positioning member 82 abuts against or releases from the inner wall of the positioning groove 81, thereby increasing or decreasing the friction between the positioning member 82 and the positioning groove 81, thus fixing or releasing the plug-in 4.

[0028] Furthermore, in this embodiment, a plurality of partitions 83 are fixedly provided in the positioning groove 81. The partitions 83 form a gear slot that cooperates with the positioning member 82. When the positioning member 82 is inserted into different gear slots, the partitions 83 prevent the positioning member 82 from moving, thereby further fixing the length of the grounding device and keeping it within a reasonable range. Even if the positioning member 82 slips between itself and the positioning groove 81, it is limited to the range of the gear slot. In some embodiments, the partitions 83 are provided with inclined surfaces on both sides to facilitate guiding the positioning member 82 into the gear slot.

[0029] More specifically, in this embodiment, the pre-embedded part 1 is provided with an extension plate 9, which is spirally wound around the outer wall of the pre-embedded part 1. The connecting part 2 is provided with an installation groove that cooperates with the connector 6. The connector 6 includes a circular part and a connecting handle part, which passes through the installation groove and is used to connect an external grounding wire. In some embodiments, after the grounding wire is welded to the connecting handle, an insulating protective sleeve is provided on the outside to prevent rust.

[0030] A grounding method for wind turbine foundation construction, comprising the aforementioned wind turbine foundation construction device, and further comprising the following steps: S1. Drill pre-embedded holes near or below the foundation, analyze the samples dug out from the holes to determine the geology of the area. If it is a rocky area, deep holes need to be drilled and filled with drag-reducing agent. S2. Rotate the positioning member 82 to adjust its position so that the positioning member 82 is released from contact with the inner wall of the positioning groove 81, and the fixing of the plug-in 4 is released. According to the depth of the pre-embedded hole, move the plug-in 4 up and down to adjust the length of the plug-in 4 so that the mounting base 53 is above the ground surface. Place the pre-embedded part 1 of the adjusted grounding device into the pre-embedded hole. S3. Adjust the angle of the connecting part 2 according to the position of the pre-embedded hole, the grounding wire, and the wind turbine foundation to facilitate connection with the grounding wire. After the adjustment is completed, backfill the pre-embedded hole with loess or sand. After reaching the designed thickness, compact it and fix the grounding device. In some areas, it is also necessary to pour concrete blocks for fixation. S4. Remove the pressure plate 7 by removing the bolts, place the connector 6 connected to the grounding wire into the mounting groove of the connecting part 2, and finally fix the pressure plate 7 back onto the connecting part 2 to press and fix the connector 6.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A grounding device for wind turbine foundation construction, comprising a pre-embedded part (1) and a connecting part (2), characterized in that, The lower end of the pre-embedded part (1) is fixedly provided with a cone-shaped spike (3). The pre-embedded part (1) is provided with a slot. A plug-in (4) is movably inserted into the slot. The plug-in (4) is connected to the connecting part (2) through a connecting component (5). The connecting part (2) is provided with a connector (6) connected to the grounding wire. The connecting part (2) is provided with a pressure plate (7) that cooperates with the connector (6) through fasteners. The pre-embedded part (1) is provided with a positioning component (8) that cooperates with the plug-in (4).

2. The grounding device for wind turbine foundation construction according to claim 1, characterized in that: The connecting component (5) includes a connecting post (51), which is connected to a mounting base (53) via a disassembly component (52). The mounting base (53) is connected to the connecting part (2) via an angle adjustment component (54).

3. The grounding device for wind turbine foundation construction according to claim 2, characterized in that: The disassembly assembly (52) includes two flanges (521), which are respectively disposed on the mounting base (53) and the connecting column (51), and are connected by fasteners.

4. The grounding device for wind turbine foundation construction according to claim 2, characterized in that: The mounting base (53) is provided with a rotating part, and the angle adjustment assembly (54) includes two connecting plates (541) connected to the rotating part.

5. A grounding device for wind turbine foundation construction according to claim 4, characterized in that: The rotating part has a through hole, and a rotating shaft (542) that is rotatably connected to the through hole is provided between the two connecting plates (541). A damping structure (55) that cooperates with the rotating shaft (542) is provided in the through hole.

6. A grounding device for wind turbine foundation construction according to claim 5, characterized in that: The damping structure (55) includes a clamping plate (551) and an elastic plate (552). The elastic plate (552) and the clamping plate (551) abut against the rotating shaft (542) under the action of the elastic plate (552).

7. A grounding device for wind turbine foundation construction according to claim 1, characterized in that: The positioning component (8) includes a positioning groove (81) opened on the plug (4), and a positioning hole that cooperates with the positioning groove (81) is opened on the pre-embedded part (1). The positioning hole is internally threaded with a positioning element (82) that cooperates with the positioning groove (81).

8. A grounding device for wind turbine foundation construction according to claim 7, characterized in that: Multiple partitions (83) are fixedly provided in the positioning groove (81), and the partitions (83) form a gear groove that cooperates with the positioning member (82).

9. A grounding device for wind turbine foundation construction according to claim 1, characterized in that: An expansion plate (9) is provided on the pre-embedded part (1). The expansion plate (9) is spirally wound around the outer wall of the pre-embedded part (1). An installation groove that cooperates with the connector (6) is provided on the connecting part (2).

10. A grounding method for wind turbine foundation construction, comprising the wind turbine foundation construction device as described in any one of claims 1-9, characterized in that: It also includes the following steps: S1. Drill pre-embedded holes near the foundation. If it is a rocky area, deep holes need to be drilled and filled with drag-reducing agent. S2. Rotate the positioning component (82) to adjust its position so that the positioning component (82) and the inner wall of the positioning groove (81) are released from contact, and the fixing of the plug-in (4) is released. According to the depth of the pre-embedded hole, adjust the length of the plug-in (4) so ​​that the mounting base (53) is above the ground surface. Place the pre-embedded part (1) of the adjusted grounding device into the pre-embedded hole. S3. Adjust the angle of the connecting part 2 according to the location of the pre-embedded hole, the grounding wire, and the wind turbine foundation to facilitate connection with the grounding wire. Backfill the pre-embedded hole with loess or sand and compact it after reaching the designed thickness. S4. Remove the pressure plate (7), place the connector (6) connected to the grounding wire into the mounting groove of the connecting part (2), and finally fix the pressure plate (7) back onto the connecting part (2) to press and fix the connector (6).

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