Anti-sloughing device for wind power plant pile foundation drilling

Abstract

The invention provides a wind power plant pile foundation drilling hole collapse prevention device, and relates to the field of wind power plant pile foundation drilling hole collapse prevention. The wind power plant pile foundation drilling hole collapse prevention device comprises a first adjusting plate and a second adjusting plate, three transverse inserting plates are arranged at the front end of the first adjusting plate, a fixing plate is arranged at the rear end of the second adjusting plate, a plurality of first vertical limiting plates are clamped to the front ends of the three inserting plates, first supporting pieces are arranged between the three inserting plates and the first adjusting plate, and the first supporting pieces are connected with the fixing plate. A plurality of second vertical limiting plates are arranged at the rear end of the fixing plate, four second transverse supporting pieces are arranged between the fixing plate and the second adjusting plate, and three inserting grooves are formed in the front end of the fixing plate. According to the anti-collapse structure, the basic supporting frame of the inserting plate, the limiting plate and the supporting piece is matched with inner and outer double-plate cooperative supporting, uniform stress transmission of the hole wall is achieved, the anti-collapse structure is stable, meanwhile, the whole component is simplified, no complex redundant design exists, and the manufacturing cost and the assembling difficulty are greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of anti-collapse holes for wind farm pile foundation drilling, specifically a device for anti-collapse holes for wind farm pile foundation drilling. Background Technology

[0002] With the accelerated global transition to clean energy, the construction scale of wind farms (including remote mountainous areas onshore and offshore areas) continues to expand. As the core load-bearing structure of wind turbines, the drilling quality of pile foundations directly determines the operational stability of wind turbines. Wind farm pile foundation drilling construction has always faced core challenges: In onshore scenarios, loess layers, loose sand and gravel layers, and high-moisture backfill layers are prone to borehole wall collapse due to drilling disturbance and water seepage; in offshore scenarios, pressure fluctuations caused by tidal changes, and the instability of silty clay and strongly weathered coral reef layers further exacerbate the risk of borehole collapse. However, traditional mud wall protection processes pollute the environment (especially in offshore wind power) and have complex mud ratio control; double-casing and long-casing technologies are bulky, difficult to transport and lower, and costly; electromagnetic drive or servo adjustment devices rely on complex drive components, resulting in high failure rates and maintenance costs, making them unsuitable for the large-scale construction of wind farms and the convenient operation requirements of remote and offshore scenarios. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a device for preventing collapse during drilling of wind farm pile foundations, which solves the problems of bulky structure, difficult transportation and placement, and high cost of traditional anti-collapse hole devices.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A device for preventing collapse during drilling of wind farm pile foundations includes an adjusting plate 1 and an adjusting plate 2. The front end of the adjusting plate 1 is provided with three horizontal insert plates, and the rear end of the adjusting plate 2 is provided with a fixing plate. The front ends of the three insert plates are engaged with multiple vertical limiting plates 1. A support member 1 is provided between each of the three insert plates and the adjusting plate 1. The rear end of the fixing plate is provided with multiple vertical limiting plates 2. Four horizontal support members 2 are provided between the fixing plate and the adjusting plate 2. The front end of the fixing plate is provided with three slots. The interior of the limiting plates 1 and 2 is provided with a supporting circular plate, and the interior of the supporting circular plate is provided with a supporting square plate. A positioning plate is provided on one side of each of the three support members 1.

[0006] The above technical solution forms the basic support frame of the insertion plate, limiting plate and support components. With the cooperation of the inner and outer double plates, it realizes the uniform force transmission to the hole wall, the anti-collapse structure is stable, and the overall components are simplified without complex and redundant design, which greatly reduces the manufacturing cost and assembly difficulty.

[0007] Furthermore, the inner wall of the supporting circular plate is provided with four sliding grooves, and the four corners of the outer wall of the supporting square plate slide with the inner wall of the sliding groove. The outer wall of the supporting circular plate is fixedly connected with multiple connecting plates, and the outer wall of the connecting plates slides with the inner walls of the corresponding multiple limiting plates II and multiple limiting plates I.

[0008] Through the above technical solution, the sliding cooperation between the slide and the supporting square plate enables flexible adaptation of the supporting structure. The connecting plate strengthens the overall connection between the supporting round plate and the limiting plate, ensuring that the supporting force is evenly distributed and avoiding local stress concentration that could lead to structural deformation.

[0009] Furthermore, the rear ends of the second adjustment plate slide against the inner wall of the corresponding second support member, the front ends of the first adjustment plate slide against the inner wall of the corresponding first support member, and the upper and lower ends of the three insertion plates slide against the upper and lower ends of the inner walls of the three corresponding slots.

[0010] Through the above technical solution, the multi-set sliding connection design enables the overall device to flexibly shrink and expand, which can quickly adapt to pile foundation drilling of different diameters. Moreover, the shrinkage volume is compact, which is convenient for transportation, hoisting and lowering into the drilling hole.

[0011] Furthermore, the outer walls of one side of each of the three support members are fixedly connected to the corresponding positions of the positioning plates, the rear ends of each fixing plate are fixedly connected to the front ends of the corresponding plurality of limiting plates, and the rear ends of the plurality of limiting plates are engaged with the front ends of the corresponding three insert plates.

[0012] Through the above technical solution, the positioning plate achieves centralized fixation of the support component one, forming a symmetrical force-bearing structure. The snap-fit ​​connection simplifies the assembly and disassembly of the device, improves on-site construction efficiency, and ensures the reliability of the structural connection.

[0013] Furthermore, the locking point between the limiting plate and the insert plate is provided with an elastic anti-disengagement protrusion, which is embedded in the corresponding slot of the insert plate to achieve anti-loosening locking between the limiting plate and the insert plate.

[0014] Through the above technical solutions, the elastic anti-detachment protrusions effectively prevent the device from becoming stuck, loose, or detached under drilling vibration and soil compression, ensuring the long-term stability of the support structure and reducing the frequency of maintenance during construction.

[0015] Furthermore, anti-deviation strips are provided on both sides of the connecting plate, and anti-deviation grooves adapted to the anti-deviation strips are opened on the inner walls of the first limiting plate and the second limiting plate. The anti-deviation strips are embedded in the anti-deviation grooves and slide along the anti-deviation grooves.

[0016] Through the above technical solution, the cooperation between the anti-deviation strip and the anti-deviation groove restricts the sliding displacement of the connecting plate, ensures the positioning of the supporting circular plate, avoids the impact of component misalignment on the support effect, and improves the adjustment accuracy and stability of the device.

[0017] Furthermore, both sides of the insert plate are provided with sliding strips, and the inner wall of the slot is provided with sliding grooves that are adapted to the sliding strips. The sliding strips and sliding grooves slide together to improve the sliding stability of the insert plate and the slot.

[0018] Through the above technical solution, the close fit between the sliding strip and the sliding groove reduces frictional loss when the insert plate slides, avoids the impact of mud and sand jamming on the flexibility of shrinkage and expansion, and improves the guidance during the sliding process to ensure smooth adjustment of the device.

[0019] This invention provides a device for preventing collapse during drilling of wind farm pile foundations. It has the following beneficial effects:

[0020] This invention provides a device for preventing collapse during drilling of wind farm pile foundations. This device is extremely simple to operate and has a streamlined structure. It only requires releasing the locking plate from the insert plate; the entire structure can be quickly retracted and expanded by sliding the insert plate along the slot. There are no complex drive components, the assembly process is simple, raw material consumption is low, and manufacturing costs are significantly reduced. After retraction, its compact size facilitates transportation, handling, and placement within the borehole in wind farms, making it suitable for confined working spaces. Once the insert plate slides into place, it is positioned using a supporting circular plate, forming a stable support structure with the internal supporting square plate. This structure can evenly distribute the pressure on the borehole wall, ensuring reliable anti-collapse performance. Furthermore, each component has a clear functional division and close cooperation, resulting in low wear, low failure rate, and reusability, further reducing long-term construction costs. It meets the needs of rapid on-site assembly and large-scale construction in wind farm pile foundation drilling. Attached Figure Description

[0021] Figure 1 This is an isometric view of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the present invention;

[0023] Figure 3 This is an isometric view of the structural component of the present invention;

[0024] Figure 4 This is a partial exploded view of the structure of the present invention;

[0025] Figure 5 This is a partial structural schematic diagram of the present invention;

[0026] Figure 6 This is a partial structural isometric view of the present invention;

[0027] Figure 7 This is a partially exploded view illustrating the structure of the present invention;

[0028] Figure 8 This is an exploded view of the supporting circular plate structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the second support component of the present invention;

[0030] Figure 10 This is an exploded view of the structure of the adjustment plate of the present invention.

[0031] In the picture:

[0032] 1. Adjustment plate one; 11. Support component one; 12. Limiting plate one; 13. Insert plate; 14. Positioning plate; 2. Adjustment plate two; 21. Support component two; 22. Fixing plate; 23. Limiting plate two; 24. Slot; 3. Support round plate; 31. Connecting plate; 32. Slide groove; 4. Support square plate. Detailed Implementation

[0033] The technical solutions of the embodiments 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, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] like Figure 1-7 As shown in the embodiment of the present invention, a device for preventing collapse during drilling of wind farm pile foundations is provided, comprising an adjusting plate 1 and an adjusting plate 2. The front end of the adjusting plate 1 is provided with three horizontal insert plates 13, and the rear end of the adjusting plate 2 is provided with a fixing plate 22. Multiple vertical limiting plates 12 are engaged at the front ends of the three insert plates 13. Support members 11 are provided between each of the three insert plates 13 and the adjusting plate 1. Multiple vertical limiting plates 23 are provided at the rear ends of each fixing plate 22. Four horizontal supports are provided between each fixing plate 22 and the adjusting plate 2. The front end of component 21 and fixing plate 22 is provided with three slots 24. The interior of limiting plate 12 and limiting plate 23 is provided with supporting circular plate 3. The interior of supporting circular plate 3 is provided with supporting square plate 4. The side of each of the three supporting components 11 is provided with positioning plate 14, which constitutes the basic support frame of insert plate 13, limiting plate and supporting components. With the cooperation of inner and outer double plates, the uniform force transmission to the hole wall is realized, the anti-collapse structure is stable, and the overall components are simplified without complex and redundant design, which greatly reduces manufacturing cost and assembly difficulty.

[0035] The inner wall of the supporting circular plate 3 is provided with four sliding grooves 32. The four corners of the outer wall of the supporting square plate 4 slide against the inner wall of the sliding grooves 32. Multiple connecting plates 31 are fixedly connected to the outer wall of the supporting circular plate 3. The outer wall of the connecting plate 31 slides against the inner wall of the corresponding multiple limiting plates 23 and multiple limiting plates 12. The sliding cooperation between the sliding grooves 32 and the supporting square plate 4 realizes the flexible adaptation of the supporting structure. The connecting plates 31 strengthen the overall connection between the supporting circular plate 3 and the limiting plates, ensure that the supporting force is evenly distributed, and avoid local stress concentration that leads to structural deformation.

[0036] The rear ends of the adjustment plate 2 slide against the inner wall of the corresponding support 21, the front ends of the adjustment plate 1 slide against the inner wall of the corresponding support 11, and the upper and lower ends of the three insert plates 13 slide against the upper and lower ends of the inner walls of the three corresponding slots 24. The multi-set sliding connection design enables the flexible contraction and expansion of the device as a whole, which can quickly adapt to pile foundation drilling of different diameters. After contraction, the volume is compact, which is convenient for transportation, hoisting and lowering into the drilling hole.

[0037] The outer walls of one side of each of the three support components 11 are fixedly connected to the corresponding positions of the positioning plate 14. The rear ends of the fixing plate 22 are fixedly connected to the front ends of the corresponding multiple limiting plates 23. The rear ends of the multiple limiting plates 12 are engaged with the front ends of the corresponding three insert plates 13. The positioning plate 14 achieves centralized fixing of the support components 11, forming a symmetrical force-bearing structure. The engagement simplifies the assembly and disassembly of the device, improves on-site construction efficiency, and ensures the reliability of the structural connection.

[0038] The locking point between the limiting plate 12 and the insert plate 13 is provided with an elastic anti-loosening protrusion. The elastic anti-loosening protrusion is embedded in the corresponding slot of the insert plate 13 to achieve anti-loosening locking between the limiting plate 12 and the insert plate 13. The elastic anti-loosening protrusion effectively prevents the device from loosening or detaching under drilling vibration and soil compression, ensuring the long-term stability of the support structure and reducing the frequency of maintenance during construction.

[0039] Both sides of the connecting plate 31 are provided with anti-deviation strips. The inner walls of the first limiting plate 12 and the second limiting plate 23 are provided with anti-deviation grooves that are adapted to the anti-deviation strips. The anti-deviation strips are embedded in the anti-deviation grooves and slide along the anti-deviation grooves. The cooperation between the anti-deviation strips and the anti-deviation grooves restricts the sliding displacement of the connecting plate 31, ensures the positioning of the supporting circular plate 3, avoids the support effect being affected by component misalignment, and improves the adjustment accuracy and stability of the device.

[0040] The two side walls of the insert plate 13 are provided with sliding strips, and the inner wall of the slot 24 is provided with sliding grooves that are adapted to the sliding strips. The sliding strips and sliding grooves slide together to improve the sliding stability of the insert plate 13 and the slot 24. The close fit between the sliding strips and sliding grooves reduces the frictional loss when the insert plate 13 slides, avoids the impact of mud and sand jamming on the flexibility of shrinkage and expansion, and improves the guidance during the sliding process to ensure smooth adjustment of the device.

[0041] Working principle: Before construction, release the locking fit between the limiting plate 12 and the insert plate 13, push the adjusting plate 1 to move towards the adjusting plate 2, and drive the three horizontal insert plates 13 to slide inward along the slots 24 on the fixed plate 22. The overall structure gradually becomes compact as the insert plates 13 shrink.

[0042] At this time, the supporting circular plate 3 moves synchronously with the insert plate 13, and the internal supporting square plate 4 maintains its own stable posture by sliding and adapting with the four corners and the slide groove 32, avoiding structural disorder, and finally shrinks to the minimum volume to adapt to transportation and lowering requirements.

[0043] The retractable device is lowered to the preset depth of the wind farm pile foundation borehole using hoisting equipment. The compact structure can easily adapt to the narrow working space inside the borehole, reducing the difficulty of lowering.

[0044] Pull the adjustment plate 1 outward to drive the insertion plate 13 to slide outward along the slot 24 until the insertion plate 13 reaches the preset unfolding position. At this time, the support circular plate 3 unfolds synchronously with the insertion plate 13. It achieves precise positioning by fitting its outer wall with the limiting plate 12 and the limiting plate 23. At the same time, the support square plate 4 inside the support circular plate 3 forms a stable support structure with the support circular plate 3 through the limiting effect of the sliding groove 32. The sliding fit between the connecting plate 31 and the limiting plate further enhances the overall structure.

[0045] Finally, the deployed device, together with the limiting plate 12 and the limiting plate 23, the supporting circular plate 3 and the supporting square plate 4, forms a support frame that is adapted to the borehole diameter, evenly dispersing the radial pressure of the borehole wall and achieving the effect of preventing borehole collapse.

[0046] After construction is completed, the locking plate 12 and the insert plate 13 are released again, and the adjusting plate 1 is pushed to make the insert plate 13 retract inward along the slot 24. After the overall structure volume is reduced, the device is taken out of the drill hole by hoisting equipment and can be reused.

[0047] The following points should be noted in this article:

[0048] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in a general design.

[0049] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0050] The technical solutions of the embodiments 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, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A device for preventing collapse during drilling of wind farm pile foundations, comprising an adjustment plate one (1) and an adjustment plate two (2), characterized in that: The front end of the adjustment plate 1 (1) is provided with three horizontal insert plates (13), the rear end of the adjustment plate 2 (2) is provided with a fixing plate (22), the front ends of the three insert plates (13) are engaged with multiple vertical limiting plates 1 (12), a support member 1 (11) is provided between the three insert plates (13) and the adjustment plate 1 (1), the rear end of the fixing plate (22) is provided with multiple vertical limiting plates 2 (23), the fixing plate (22) and the adjustment plate 2 (2) are provided with four horizontal support members 2 (21), the front end of the fixing plate (22) is provided with three slots (24), the inside of the limiting plate 1 (12) and the limiting plate 2 (23) is provided with a supporting circular plate (3), the inside of the supporting circular plate (3) is provided with a supporting square plate (4), and a positioning plate (14) is provided on one side of the three support members 1 (11).

2. The anti-collapse hole device for wind farm pile foundation drilling according to claim 1, characterized in that: The inner wall of the supporting circular plate (3) is provided with four sliding grooves (32). The four corners of the outer wall of the supporting square plate (4) slide against the inner wall of the sliding grooves (32). The outer wall of the supporting circular plate (3) is fixedly connected with multiple connecting plates (31). The outer wall of the connecting plates (31) slides against the inner wall of the corresponding multiple limiting plates (23) and multiple limiting plates (12).

3. The anti-collapse hole device for wind farm pile foundation drilling according to claim 1, characterized in that: The rear ends of the second adjustment plate (2) slide against the inner wall of the corresponding second support member (21), the front ends of the first adjustment plate (1) slide against the inner wall of the corresponding first support member (11), and the upper and lower ends of the three insert plates (13) slide against the upper and lower ends of the inner walls of the three corresponding slots (24).

4. The anti-collapse hole device for wind farm pile foundation drilling according to claim 1, characterized in that: The outer walls of one side of each of the three support members (11) are fixedly connected to the corresponding position of the positioning plate (14), the rear end of each of the fixed plates (22) is fixedly connected to the front end of each of the corresponding multiple limiting plates (23), and the rear end of each of the multiple limiting plates (12) is engaged with the front end of each of the three corresponding insert plates (13).

5. The anti-collapse hole device for wind farm pile foundation drilling according to claim 1, characterized in that: The locking point between the limiting plate (12) and the insert plate (13) is provided with an elastic anti-loosening protrusion. The elastic anti-loosening protrusion is embedded in the corresponding slot of the insert plate (13) to realize the anti-loosening locking between the limiting plate (12) and the insert plate (13).

6. The anti-collapse device for wind farm pile foundation drilling according to claim 2, characterized in that: Both sides of the connecting plate (31) are provided with anti-deviation strips. The inner walls of the limiting plate one (12) and the limiting plate two (23) are provided with anti-deviation grooves that are adapted to the anti-deviation strips. The anti-deviation strips are embedded in the anti-deviation grooves and slide along the anti-deviation grooves.

7. The anti-collapse device for wind farm pile foundation drilling according to claim 1, characterized in that: The two side walls of the insert plate (13) are provided with sliding strips, and the inner wall of the slot (24) is provided with sliding grooves that are adapted to the sliding strips. The sliding strips and sliding grooves slide together to improve the sliding stability of the insert plate (13) and the slot (24).

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