Electric field grounding bus area pre-embedded structure and construction method thereof
By pre-embedding grounding busbar conduits and conductive ring structures in the tower foundation, the problem of poor grounding effect of wind turbines in high resistivity areas was solved, enabling continuous grounding construction to be carried out immediately after the tower is completed, reducing construction waiting time and improving construction efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DATANG SHANDONG CLEAN ENERGY DEV
- Filing Date
- 2025-12-26
- Publication Date
- 2026-04-21
AI Technical Summary
The grounding effect of wind turbines in areas with high soil resistivity is difficult to guarantee, and the existing tower foundations lack reserved grounding construction channels, which means that the grounding construction team has to carry out the work in stages, especially during the long waiting time for concrete curing.
The grounding busbar is pre-embedded in the tower foundation with conduit, plug, pre-embedded marker rod, and conductive ring mounting base. It is connected to the steel mesh with wires to ensure the grounding wire is unobstructed. Pre-embedded marker rods are set on the outer wall to mark the outlet position and provide construction convenience.
This allows for continuous grounding construction immediately after the tower foundation is completed, reducing construction waiting time and making it particularly suitable for areas with high soil resistivity, thus improving grounding efficiency.
Smart Images
Figure CN121897017A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of wind power generation technology, specifically relating to a pre-embedded structure in the electric field grounding busbar area and its construction method. Background Technology
[0002] The conventional grounding method for wind turbines is to pre-embed grounding busbars during the construction of the tower foundation. Specifically, when laying the steel mesh, grounding busbars are connected at various points in the steel mesh, and trenches are dug to allow the grounding busbars to extend outwards from the tower foundation.
[0003] When soil resistivity is low, grounding can be guaranteed by relying on the steel mesh and the grounding busbars connected to the steel mesh. However, in areas with high soil resistivity, this grounding structure is difficult to guarantee the grounding effect. In this case, special grounding construction is required. However, the current tower foundation does not have a reserved channel for grounding construction. The grounding construction team has to carry out the construction in stages as the tower foundation construction progresses. When the tower foundation construction reaches the pit excavation stage, the grounding busbar trench is dug and the grounding busbar is laid. Then, when the steel mesh is laid, the grounding busbar is connected to the steel mesh. After the concrete curing is completed, the conductive ring is laid on the platform of the tower foundation. The grounding construction team has a long waiting time, especially the long waiting time for the concrete curing. Therefore, this application proposes a pre-embedded structure in the electric field grounding busbar area, so that the grounding construction team can carry out continuous grounding construction independently after the tower foundation is completed. Summary of the Invention
[0004] The purpose of this invention is to provide a pre-embedded structure and construction method for the electric field grounding busbar area, so as to solve the technical problem that the tower foundation of the current wind turbine does not have a reserved channel for grounding construction.
[0005] To address the aforementioned technical problems, this invention provides a pre-embedded structure for an electric field grounding busbar area, comprising: a tower foundation, wherein a plurality of grounding busbar conduits extend from the platform to the outer wall; plugs, which are disposed at two openings of each grounding busbar conduit; a pre-embedded marker rod, which is vertically disposed on the tower foundation and located directly above the outlet of each grounding busbar conduit on the outer wall; and a conductive ring mounting base, which is disposed on the platform of the tower foundation.
[0006] Furthermore, the grounding busbar is a conductive conduit, and its body is connected to the steel mesh in the tower foundation through several conductors.
[0007] Furthermore, the grounding busbar conduit includes: a vertical section, one end of which extends out of the platform of the tower foundation; a curved section, the upper end of which is connected to the other end of the vertical section, and the lower end of which faces the outer wall of the tower foundation; and an inclined section, the upper end of which is connected to the lower end of the curved section, and the lower end of which extends to and out of the outer wall of the tower foundation.
[0008] Furthermore, both the extended ends of the vertical section and the extended ends of the inclined section are provided with plug connecting flanges for installing plugs.
[0009] Furthermore, each of the plugs is provided with a grounding wire through-hole, and each grounding wire through-hole is covered with a grounding wire through-hole protective cap.
[0010] Furthermore, the end cap of the extended end of the vertical section is provided with a drag-reducing agent injection port, and each drag-reducing agent injection port is covered with an injection port cap.
[0011] Furthermore, several grounding modules are provided below the tower foundation, and the grounding modules are connected to the conduit of each grounding busbar through conductors.
[0012] Furthermore, the pre-embedded marker rod is located directly above the exit of each inclined section and extends beyond the ground.
[0013] On the other hand, the present invention also provides a construction method for the pre-embedded structure of the electric field grounding busbar area as described above, comprising the following steps: S1, excavating a foundation pit, laying a concrete layer at the bottom of the pit, laying a steel mesh on the concrete layer, laying grounding busbar conduits in the steel mesh, and extending both ends of the grounding busbar conduits to the platform and outer wall of the tower foundation corresponding to the steel mesh after pouring; S2, vertically setting pre-embedded marker rods in the steel mesh, and positioning the pre-embedded marker rods directly above the outlets of each grounding busbar conduit; S3, setting conductive ring mounting seats at the platform of the tower foundation corresponding to the steel mesh after pouring; S4, pouring concrete into the steel mesh to form the tower foundation.
[0014] The beneficial effects of this invention are that, in the tower foundation of the pre-embedded structure for the electric field grounding busbar area provided by this invention, several grounding busbar conduits extending from the platform to the outer wall are pre-installed during the pouring process. The ends of the grounding busbar conduits are sealed with plugs, preventing foreign objects from entering the conduits during pouring, backfilling, and after pouring, ensuring unobstructed flow for subsequent grounding wires. Furthermore, each grounding busbar conduit has a pre-embedded marker rod directly above its outlet on the outer wall, allowing the grounding construction team to locate the outlet position of the grounding busbar conduit during grounding construction, and subsequently excavate at the outlet position of the grounding busbar conduit. The grounding trench restores the grounding busbar conduit outlet from its buried state during backfilling to its exposed state. At this point, the plugs at both ends of the grounding busbar conduit can be removed, allowing the grounding wire to be threaded through the conduit's inlet located on the platform of the tower foundation and out through the conduit's outlet located on the outer wall of the tower foundation. This connects the grounding wire to the grounding grid laid out by the grounding construction team around the tower foundation, eliminating the need for the grounding construction team to perform phased construction as the tower foundation construction progresses. This is especially suitable for situations where a dedicated grounding construction team is required in areas with high soil resistivity. Attached Figure Description
[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the pre-embedded structure in the electric field grounding busbar area of the present invention. Figure 1 ; Figure 2 This is a perspective view of the pre-embedded structure in the electric field grounding busbar area of the present invention; Figure 3 This is a schematic diagram of the pre-embedded structure in the electric field grounding busbar area of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the pre-embedded structure in the electric field grounding busbar area of the present invention. Figure 3 ; Figure 5 This is a step diagram illustrating the construction method of the pre-embedded structure in the electric field grounding busbar area of the present invention; In the picture: Tower foundation 100, grounding busbar conduit 200, vertical section 210, curved section 220, inclined section 230, plug connecting flange 240, plug 300, grounding wire opening 310, grounding wire opening cap 311, resistance reducing agent injection port 320, injection port cap 321, pre-embedded marking rod 400, conductive ring mounting base 500, conductor 600, grounding module 700. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments implemented by those skilled in the art without creative effort are within the protection scope of the present invention.
[0018] Example like Figure 1 As shown, the present invention provides a pre-embedded structure for the electric field grounding busbar area, including: a tower foundation 100, combined with... Figure 2 It includes several grounding busbar conduits 200mm long extending from the platform to the outer wall; (Return) Figure 1The plug 300 is installed at the two openings of each grounding busbar conduit 200; the pre-embedded marker rod 400 is vertically installed on the tower foundation 100 and located directly above the outlet of each grounding busbar conduit 200 on the outer wall; the conductive ring mounting base 500 is installed on the platform of the tower foundation 100.
[0019] During the pouring of the tower foundation 100 of the pre-embedded structure in the grounding busbar area of this electric field, several grounding busbar conduits 200 extending from the platform to the outer wall are pre-installed. The ends of the grounding busbar conduits 200 are sealed with plugs 300 to prevent foreign objects from entering the conduits during pouring, backfilling, and after pouring, ensuring unobstructed flow for subsequent grounding wires. Furthermore, each grounding busbar conduit 200 has a pre-embedded marker rod 400 directly above its outlet on the outer wall, allowing the grounding construction team to locate the outlet position of the grounding busbar conduit 200 during grounding construction. This allows for the excavation of grounding wire trenches at the outlet positions of the grounding busbar conduits 200, ensuring the outlet of the grounding busbar conduit 200 is accessible via backfilling. When the buried state is restored to the exposed state, the plugs 300 at both ends of the grounding busbar conduit 200 are removed. The grounding wire can be passed through the entrance of the grounding busbar conduit 200 located on the platform of the tower foundation 100 and out through the exit of the grounding busbar conduit 200 located on the outer wall of the tower foundation 100. This connects the grounding wire to the grounding grid arranged by the grounding construction team around the tower foundation 100. Then, the conductive ring is installed on the conductive ring mounting base 500 to complete the grounding construction. This eliminates the need for the grounding construction team to carry out the construction in stages as the tower foundation 100 is built. This is especially suitable for situations where a dedicated grounding construction team is needed in areas with high soil resistivity.
[0020] In at least one embodiment, the grounding wire used for grounding is a graphite grounding wire, and the grounding busbar conduit 200 is a conductive conduit, such as... Figure 2 As shown, its conduit body is connected to the steel mesh in the tower foundation 100 via several conductors 600. It should be noted that the dense steel mesh in the tower foundation 100 is hidden in the attached diagram to make the conductors 600 visible; however, the installation of a steel mesh in the tower foundation 100 is existing technology, and hiding it does not affect the understanding of the connection between the conductors 600 and the steel mesh in the tower foundation 100. By connecting the grounding busbar, which is itself a conductive conduit, through the conduit 200 to the steel mesh in the tower foundation 100 via the conductors 600, the grounding effect can be enhanced.
[0021] like Figure 2As shown, to facilitate the installation of the grounding wire, the grounding busbar conduit 200 may include: a vertical section 210, one end of which extends out of the platform of the tower foundation 100; a curved section 220, the upper end of which is connected to the other end of the vertical section 210, and the lower end of which faces the outer wall of the tower foundation 100; and an inclined section 230, the upper end of which is connected to the lower end of the curved section 220, and the lower end of which extends to and out of the outer wall of the tower foundation 100.
[0022] like Figure 1 As shown, both the protruding ends of the vertical section 210 and the protruding ends of the inclined section 230 can be equipped with plug connecting flanges 240 to install plugs 300. Plugs 300 can prevent foreign objects from entering the pipe during pouring, backfilling, and after pouring, ensuring unobstructed flow inside the pipe for subsequent grounding wire passage.
[0023] Furthermore, to facilitate the installation of the grounding wire, such as Figure 1 As shown, each of the plugs 300 may be provided with a grounding wire through-hole 310, and each grounding wire through-hole 310 is covered with a grounding wire through-hole cap 311. At this time, only the grounding wire through-hole cap 311 needs to be removed to thread the wire, without removing the plug 300.
[0024] Preferably, when using a graphite grounding wire as the grounding wire, such as Figure 1 As shown, the plug 300 at the protruding end of the vertical section 210 may be provided with a resistance-reducing agent injection port 320, and each resistance-reducing agent injection port 320 is covered with an injection port cap 321. After the graphite grounding wire is installed, the resistance-reducing agent can be injected into the grounding busbar conduit 200 through the resistance-reducing agent injection port 320, so that the graphite grounding wire is a section in the grounding busbar conduit 200, and can also be well connected to the ground through the resistance-reducing agent, the grounding busbar conduit 200, the conductor 600, and the steel mesh in the tower foundation 100.
[0025] like Figure 3 As shown, several grounding modules 700 can be pre-installed below the tower foundation 100 during construction, and the grounding modules 700 are connected to the conduit body of each grounding busbar conduit 200 via conductors 600. Preferably, the grounding modules 700 are graphite grounding modules to further improve the grounding effect.
[0026] like Figure 4 As shown, the pre-embedded marker pole 400 is located directly above the outlet of each inclined section 230 and extends out of the ground. The pre-embedded marker pole 400 allows the subsequent grounding construction team to locate the outlet position of the grounding busbar conduit 200 during grounding construction, and then excavate a grounding wire trench at the outlet position of the grounding busbar conduit 200, so that the outlet of the grounding busbar conduit 200 is restored from the buried state during backfilling to the exposed state.
[0027] In at least one embodiment, such as Figure 5As shown, the present invention also provides a construction method for the pre-embedded structure of the electric field grounding busbar area as described above, including the following steps: S1, excavating a foundation pit, laying a concrete layer at the bottom of the pit, laying a steel mesh on the concrete layer, laying a grounding busbar conduit 200 in the steel mesh, and extending both ends of the grounding busbar conduit 200 to the platform and outer wall of the tower foundation 100 corresponding to the steel mesh after pouring; S2, vertically setting the pre-embedded marking rod 400 in the steel mesh, and positioning the pre-embedded marking rod 400 directly above the outlet of each grounding busbar conduit 200; S3, setting the conductive ring mounting base 500 at the platform of the tower foundation 100 corresponding to the steel mesh after pouring; S4, pouring concrete into the steel mesh to form the tower foundation 100.
[0028] The tower foundation 100 constructed using this method has several grounding busbar conduits 200 extending from the platform to the outer wall. Each grounding busbar conduit 200 has a pre-embedded marker rod 400 directly above its outlet on the outer wall as a marker. This allows the grounding construction team to carry out grounding construction independently after the tower foundation 100 is completed, without having to carry out the construction in stages as the tower foundation 100 is built. This method is especially suitable for situations where a dedicated grounding construction team is needed in areas with high soil resistivity.
[0029] In summary, the pre-embedded structure and construction method for the electric field grounding busbar area provided by this invention pre-installs several grounding busbar conduits 200 extending from the platform to the outer wall during the pouring of the tower foundation 100. The ends of the grounding busbar conduits 200 are sealed with plugs 300, preventing foreign objects from entering the conduits during pouring, backfilling, and after pouring, ensuring unobstructed flow for subsequent grounding wires. Furthermore, each grounding busbar conduit 200 has a pre-embedded marker rod 400 directly above its outlet on the outer wall, allowing the grounding construction team to locate the outlet position of the grounding busbar conduit 200 during grounding construction. This allows for the excavation of grounding wire trenches at the outlet position of the grounding busbar conduit 200, enabling the grounding busbar conduit 200 to pass through. The outlet is restored from its buried state during backfilling to its exposed state. At this time, the plugs 300 at both ends of the grounding busbar conduit 200 are removed. The grounding wire can be passed through the inlet of the grounding busbar conduit 200 located on the platform of the tower foundation 100 and out through the outlet of the grounding busbar conduit 200 located on the outer wall of the tower foundation 100. This connects the grounding wire to the grounding grid arranged by the grounding construction team around the tower foundation 100. Then, the conductive ring is installed on the conductive ring mounting seat 500 to complete the grounding construction. This eliminates the need for the grounding construction team to carry out the construction in stages as the tower foundation 100 is built. It is especially suitable for situations where a dedicated grounding construction team is needed in areas with high soil resistivity.
[0030] In the embodiments provided in this application, it should be understood that the disclosed systems and devices can be implemented in other ways. The embodiments described above are merely illustrative. For example, the division of the mechanism is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.
[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0032] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A pre-embedded structure for an electric field grounding busbar area, characterized in that, include: Tower foundation (100), in which several grounding busbar conduits (200) extend from the platform to the outer wall. The plug (300) is installed at the two openings of each grounding busbar conduit (200); A pre-embedded marker pole (400) is vertically installed on the tower foundation (100) and located directly above the outlet of each grounding busbar conduit (200) on the outer wall; A conductive ring mounting base (500) is provided on the platform of the tower foundation (100).
2. The pre-embedded structure in the electric field grounding busbar area according to claim 1, characterized in that, The grounding busbar conduit (200) is a conductive conduit, and its body is connected to the steel mesh in the tower foundation (100) by several conductors (600).
3. The pre-embedded structure in the electric field grounding busbar area according to claim 2, characterized in that, The grounding busbar conduit (200) includes: A vertical section (210), one end of which extends out of the platform of the tower foundation (100); The curved section (220) has its upper end connected to the other end of the vertical section (210) and its lower end facing the outer wall of the tower foundation (100); The inclined section (230) is connected at its upper end to the lower end of the curved section (220), and the lower end extends to and protrudes from the outer wall of the tower foundation (100).
4. The pre-embedded structure in the electric field grounding busbar area according to claim 3, characterized in that, Both the extended end of the vertical section (210) and the extended end of the inclined section (230) are provided with plug connecting flanges (240) for installing plugs (300).
5. The pre-embedded structure in the electric field grounding busbar area according to claim 4, characterized in that, Each plug (300) is provided with a grounding wire through-hole (310), and each grounding wire through-hole (310) is covered with a grounding wire through-hole cap (311).
6. The pre-embedded structure in the electric field grounding busbar area according to claim 5, characterized in that, The plug (300) at the extended end of the vertical section (210) is provided with a drag-reducing agent injection port (320), and each drag-reducing agent injection port (320) is covered with an injection port cap (321).
7. The pre-embedded structure in the electric field grounding busbar area according to claim 6, characterized in that, Several grounding modules (700) are provided below the tower foundation (100), and the grounding modules (700) are connected to the pipe body of each grounding busbar conduit (200) through conductors (600).
8. The pre-embedded structure in the electric field grounding busbar area according to claim 7, characterized in that, The pre-embedded marker pole (400) is located directly above the outlet of each inclined section (230) and extends out of the ground.
9. A construction method for a pre-embedded structure in the electric field grounding busbar area as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1, excavate the foundation pit, lay a concrete layer at the bottom of the pit, lay a steel mesh on the concrete layer, lay a grounding busbar conduit (200) in the steel mesh, and make the two ends of the grounding busbar conduit (200) extend to the platform and outer wall of the tower foundation (100) after the steel mesh is poured. S2, the pre-embedded marker rod (400) is vertically set in the steel mesh, and the pre-embedded marker rod (400) is located directly above the outlet of each grounding busbar conduit (200); S3, the conductive ring mounting base (500) is set at the platform of the tower foundation (100) after the steel mesh is poured; S4, pour concrete into the steel mesh to form the tower foundation (100).