Wind power foundation and construction method thereof

Abstract

The application relates to the technical field of wind power foundations, in particular to a wind power foundation and a construction method thereof. The wind power foundation comprises a base and four concrete pile foundations, the top end of each concrete pile foundation is provided with a hydraulic column, each concrete pile foundation is provided with an expansion support, the movable end of each hydraulic column is hinged to the base, a universal ball seat is embedded in the center position of the base, a base column is installed on the top surface of the universal ball seat, a limiting disc is installed at the bottom of the base column, a group of limiting springs are installed between the limiting disc and the base, a universal sliding sleeve is slidably sleeved on the base column, turbulence devices are arranged on the top and bottom of the universal sliding sleeve, a sleeve ring is embedded on the universal sliding sleeve, four universal hinge joints are embedded on the sleeve ring, and four hydraulic push rods are hinged to the base. The application constructs a wind-resistant stability system with the electric control system as the core, the hydraulic push rod, the universal sliding sleeve and the turbulence device in deep linkage, and realizes a technical breakthrough from passive bearing to active offsetting.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power foundation, in particular to a wind power foundation and a construction method thereof. BACKGROUND

[0002] Under the background of rapid development of new energy industry, wind power, as an important part of clean and renewable energy, its development and application scale continues to expand. Among them, mountain wind power, due to its rich wind energy resources, proximity to load center, and non-occupation of arable land, has become one of the core development directions in the field of wind power. However, the mountain wind power foundation, as the key structure supporting the wind power tower, bearing wind load, mountain landslide thrust, surface runoff scouring and geological subsidence, its long-term stability, topographic adaptability and operation and maintenance convenience have always been the core technical problems faced by the industry.

[0003] The current mainstream mountain wind power foundation mostly adopts a combination structure of concrete pile foundation and rigid base. Such foundation has the following significant problems in actual service process:

[0004] The mountain wind conditions are complex and changeable, and the terrain slope is large and the geological conditions are diverse. Strong wind and slope sliding can easily lead to the inclination or vibration of the wind power foundation. The existing rigid foundation structure cannot realize dynamic posture adjustment, and only relies on its own weight and fixed support to resist external load. When encountering extreme wind conditions or geological subsidence, the load is easily concentrated on the top of the foundation column, which can lead to insufficient overall anti-overturning capacity of the foundation, and even cause tower inclination, structure damage and other safety accidents. In order to improve the anti-overturning capacity, some mountain wind power foundations are equipped with fixed weight counterweights. However, the fixed counterweight cannot dynamically adjust the center of gravity of the foundation according to the real-time wind conditions and geological subsidence. When the wind speed and direction change or the slope body appears slight sliding, the fixed counterweight is difficult to effectively balance the lateral load, which not only increases the redundant load of the foundation structure, but also may further aggravate the foundation inclination risk due to the shift of the center of gravity, and cannot realize precise center of gravity optimization control.

[0005] Therefore, the present application provides a wind power foundation and a construction method thereof to solve the problems in the background art. SUMMARY

[0006] The present application provides a wind power foundation and a construction method thereof to solve the problems in the background art.

[0007] In order to achieve the above object, the technical scheme adopted by the present application is: a wind power foundation, comprising a base and four concrete pile foundations, the top end of each concrete pile foundation is provided with a hydraulic column, and each concrete pile foundation is provided with an expansion support, the movable end of each hydraulic column is hinged to the base, a universal ball seat is embedded in the center position of the base, a base column is installed on the top surface of the universal ball seat, a limiting disc is installed at the bottom of the base column, a group of limiting springs are installed between the limiting disc and the base, a universal sliding sleeve is slidably sleeved on the base column, a turbulence device is arranged on the top and bottom of the universal sliding sleeve, a sleeve ring is embedded on the universal sliding sleeve, four universal hinges are embedded on the sleeve ring, four hydraulic push rods are hinged to the base, the movable ends of the four hydraulic push rods are fixedly connected with the four universal hinges, a double-shaft driving platform is installed on the bottom surface of the base, a double-shaft movable suspension seat is connected to the double-shaft driving platform, a counterweight cylinder for dynamically adjusting the counterweight is arranged on the suspension seat, an electric control system is installed at the bottom of the base column, and the electric control system controls the extension and retraction of the hydraulic push rod, the weight adjustment of the counterweight cylinder and the displacement of the double-shaft driving platform in real time according to the detection data of the wind speed and direction instrument and the inclination sensor.

[0008] As a preferred technical scheme of the present application, the expansion support comprises a top ring and a bottom ring sleeved on the concrete pile foundation, a plurality of locking bolts matched with the concrete pile foundation are threadedly installed on the top ring and the bottom ring, a plurality of angle adjusting arms are hinged to the top ring, and a supporting arm is hinged to the bottom ring at a position corresponding to each angle adjusting arm.

[0009] As a preferred technical scheme of the present application, the turbulence device comprises a turbulence rotating seat rotatably sleeved on the universal sliding sleeve, and a group of wind moving blades are arranged in a circumferential array on the turbulence rotating seat.

[0010] As a preferred technical scheme of the present application, a group of guide sliding blocks are installed on the inner wall of the universal sliding sleeve, a guide groove slidably connected with each guide sliding block is formed at a position corresponding to each guide sliding block on the top end of the base column, and a flange connecting disc is installed on the top end of the base column.

[0011] As a preferred technical scheme of the present application, the double-shaft driving platform comprises an axial screw rod transmission module installed on the base, a shaft moving frame is connected to the axial screw rod transmission module, a longitudinal screw rod transmission module is installed on the shaft moving frame, and the longitudinal screw rod transmission module is drivingly connected with the suspension seat.

[0012] As a preferred technical scheme of the present application, a group of tension sensors are installed between the counterweight cylinder and the suspension seat, a liquid storage cavity is fixedly formed in the counterweight cylinder, a pump body is installed on the bottom surface of the counterweight cylinder, the liquid outlet port of the pump body is communicated with the liquid storage cavity, the liquid inlet port of the pump body is communicated with a pump liquid hose, and an electromagnetic drain valve is communicated with the bottom of the counterweight cylinder.

[0013] As the preferred technical scheme of the present application, the electric control system comprises an electric control box and a sensor mounting seat mounted on the base column, the electric control box is internally provided with a storage battery and a PLC controller respectively, the power supply end of the storage battery is electrically connected with the PLC controller, the sensor mounting seat is provided with an inclination sensor, a wind speed and direction instrument and an ultrasonic ranging probe group respectively, and the data end of the tension sensor, the inclination sensor, the wind speed and direction instrument and the ultrasonic ranging probe group are all data-connected with the PLC controller through data lines.

[0014] As the preferred technical scheme of the present application, the connection between the hydraulic column and the concrete pile foundation and the connection between the hydraulic push rod and the base are both embedded with stress sensors.

[0015] As the preferred technical scheme of the present application, the outer surfaces of the base column, the hydraulic column, the base, the double-shaft driving platform and the hydraulic push rod are all coated with epoxy glass flake coating, the thickness of the epoxy glass flake coating is 150-200 microns, the counterweight cylinder is a flexible cylinder shell made of fluorine rubber material, the bottom end of the flexible cylinder shell is provided with a counterweight plate, and the pump body is arranged at the bottom surface center position of the counterweight plate.

[0016] A construction method of a wind power foundation, comprising the following steps:

[0017] SS01, four concrete pile foundations are constructed, a hydraulic column is installed at the top end of each concrete pile foundation, and an expansion support is arranged on each concrete pile foundation;

[0018] SS02, the base is hingedly connected with the movable ends of the four hydraulic columns, and the installation of the base is completed;

[0019] SS03, a universal ball seat is embedded at the center position of the base, a base column with a limiting disc is installed on the universal ball seat, and a set of limiting springs are installed between the limiting disc and the base;

[0020] SS04, a universal sliding sleeve is slidably sleeved on the base column, a flow disturbing device is arranged at the top and bottom of the universal sliding sleeve, a sleeve ring is embedded on the universal sliding sleeve, and four universal hinge joints are embedded on the sleeve ring;

[0021] SS05, four hydraulic push rods are hingedly connected on the base, and the movable ends of the four hydraulic push rods are fixedly connected with the four universal hinge joints respectively;

[0022] SS06, a double-shaft driving platform is installed on the bottom surface of the base, a double-shaft moving suspension seat is connected on the double-shaft driving platform, and a counterweight cylinder for dynamically adjusting the counterweight weight is arranged on the suspension seat;

[0023] SS07, install an electric control system at the bottom of the base column, connect the anemometer and the tilt sensor with the electric control system, so that the electric control system can control the extension and retraction of the hydraulic push rod, the weight adjustment of the counterweight cylinder and the displacement of the double-shaft driving platform in real time according to the detection data of the two.

[0024] Compared with the prior art, the present application has the beneficial effects:

[0025] 1. The present application constructs a wind-resistant stability system with deep linkage of the electric control system as the core, the hydraulic push rod, the universal sliding sleeve and the spoiler device, realizes the technical breakthrough from passive bearing to active offset, the tilt sensor monitors the inclination angles of the X-axis and Y-axis of the base column in real time, the anemometer synchronously collects the mountain gust and air turbulence data, and the two transmit signals to the PLC controller to form a hierarchical adjustment strategy, when the inclination angle of the base column is greater than 0.5° or the wind speed exceeds the safety threshold, the PLC controller controls the four hydraulic push rods to extend and retract cooperatively, the universal hinge adapter is adapted to the angle change, the universal sliding sleeve is driven to fine-tune the posture along the guide groove of the base column, and the wind-driven rotating blades of the spoiler device are rotated to disrupt the air flow distribution and reduce the lateral wind load, even if extreme wind conditions are encountered, the base height can be reduced by shortening the hydraulic column slightly, the double-shaft driving platform moves the counterweight cylinder to the leeward side to lock the center of gravity, so that the foundation overturning resistance coefficient is improved, and the risk of tower inclination is avoided.

[0026] 2. In view of the problem that the pile foundation anchoring is insufficient due to loose soil layer and developed rock fissures in the mountain, the expansion support designed in the present application is locked and fixed through the top ring and the bottom ring, cooperates with the angle adjusting arm to drive the support arm to open, so that the support arm is embedded into the soil around the pile or the rock fissures, and an integrated bearing structure of the pile body, the expansion support and the geological body is formed, compared with the traditional bare pile, the structure can improve the pile foundation uplift capacity and shear capacity, does not need additional drilling and grouting, is convenient to install and is suitable for various mountain geologies such as soil layer and rock layer, and solves the problem of poor anchoring stability of the pile foundation in the mountain.

[0027] 3. In view of the defect that the fixed counterweight in the mountain cannot adapt to real-time wind conditions, the present application creates a linkage adjustment system of the counterweight cylinder and the double-shaft driving platform, the counterweight cylinder adopts a fluororubber flexible cylinder shell, the weight is adjusted by pumping the pre-stored water through the pump body, the data is fed back in real time by the tension sensor, the double-shaft driving platform realizes two-dimensional movement of the hanging seat through the screw rod transmission, the counterweight cylinder can be accurately moved to the leeward side according to the wind direction to offset the lateral wind load, compared with the traditional fixed counterweight, the system can reduce the redundant counterweight load, and at the same time, the slope sliding risk can be predicted in advance through the external soil humidity sensor, the center of gravity position is adjusted in advance, and the foundation anti-sliding stability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a whole structure schematic diagram of the wind power foundation of the present application;

[0029] Figure 2This is a schematic diagram of the limiting plate and the limiting spring.

[0030] Figure 3 for Figure 2 A partial structural cross-sectional schematic diagram;

[0031] Figure 4 for Figure 3 A magnified schematic diagram of the partial structure at point A in the middle;

[0032] Figure 5 This is a schematic diagram of the top and bottom rings.

[0033] Figure 6 This is a structural schematic diagram of the flange connection plate and the limit spring.

[0034] Figure 7 for Figure 6 A magnified schematic diagram of the local structure at point B;

[0035] Figure 8 This is a schematic diagram of the axial lead screw drive module and the longitudinal lead screw drive module.

[0036] The components represented by each number in the attached diagram are listed below: 1. Base; 2. Concrete pile foundation; 3. Hydraulic column; 4. Universal ball joint; 5. Base column; 6. Limiting plate; 7. Limiting spring; 8. Universal sliding sleeve; 9. Collar; 10. Universal hinge joint; 11. Hydraulic push rod; 12. Lifting seat; 13. Counterweight cylinder; 14. Top ring; 15. Bottom ring; 16. Locking bolt; 17. Angle adjusting arm; 18. Turbine swivel seat; 19. Wind turbine blades ; 20. Guide groove; 21. Flange connecting plate; 22. Axial screw drive module; 23. Shaft shift frame; 24. Longitudinal screw drive module; 25. Tension sensor; 26. Pump body; 27. Pump fluid hose; 28. Electrical control box; 29. ​​Sensor mounting base; 30. Tilt sensor; 31. Anemometer; 32. Ultrasonic ranging probe group; 33. Stress sensor; 34. Electromagnetic drain valve; 35. Liquid storage chamber; 36. Support arm. Detailed Implementation

[0037] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0038] The present invention provides the following preferred embodiments:

[0039] like Figures 1-8 As shown, a wind power foundation includes a base 1 and four concrete pile foundations 2. Each concrete pile foundation 2 is equipped with a hydraulic column 3 at its top and an extension support member on each concrete pile foundation 2.

[0040] The expansion support comprises a top ring 14 and a bottom ring 15 sleeved on the concrete pile foundation 2, a plurality of locking bolts 16 matched with the concrete pile foundation 2 are threadedly installed on the top ring 14 and the bottom ring 15, a plurality of angle adjusting arms 17 are hinged on the top ring 14, and a support arm 36 is hinged on the bottom ring 15 at a position corresponding to each angle adjusting arm 17, and each angle adjusting arm 17 is hinged with the corresponding support arm 36;

[0041] The expansion support is fixed by the locking of the top ring 14 and the bottom ring 15, and the support arm 36 is driven to be opened by cooperating with the angle adjusting arm 17, so that the support arm 36 is embedded into the soil or rock fissure around the pile, forming an integrated bearing structure of the pile body, the expansion support and the geological body, which can improve the pile foundation uplift resistance and shear capacity compared with the traditional bare pile, without the need for additional drilling and grouting;

[0042] The inner side of the top ring 14 and the bottom ring 15 is provided with anti-skid tooth pattern;

[0043] The movable end of each hydraulic column 3 is hinged with the base 1, a universal ball seat 4 is embedded in the center position of the base 1, a base column 5 is installed on the top surface of the universal ball seat 4, a limiting disc 6 is installed at the bottom of the base column 5, and a set of limiting springs 7 are installed between the limiting disc 6 and the base 1;

[0044] Specifically, in a preferred embodiment, the number of limiting springs 7 is 6;

[0045] A universal sliding sleeve 8 is slidably sleeved on the base column 5;

[0046] A set of guide sliding blocks are installed on the inner wall of the universal sliding sleeve 8;

[0047] Specifically, in a preferred embodiment, the number of guide sliding blocks is 3;

[0048] A guide groove 20 slidably connected with the guide sliding block is formed at a position corresponding to each guide sliding block on the base column 5, and a flange connecting disc 21 is installed at the top end of the base column 5;

[0049] When the hydraulic push rod 11 drives the universal sliding sleeve 8 to adjust the height or angle along the base column 5, the guide sliding blocks on the inner wall of the universal sliding sleeve 8 will slide along the guide grooves 20 on the base column 5 synchronously, forming precise guide constraint of the guide sliding blocks and the guide grooves 20;

[0050] This structure can limit the radial deflection of the universal sliding sleeve 8 during adjustment, ensure that it only axially ascends or descends along the base column 5 or circumferentially fine-tunes around the base column 5, improve the dynamic adjustment accuracy of the angle and height of the base column 5, and avoid uneven force or structural jamming of the hydraulic push rod 11 caused by the offset of the universal sliding sleeve 8;

[0051] Meanwhile, the flange connecting disc 21 at the top end of the base column 5 can be directly bolted with the wind power tower body, without additional adapter components, simplifying the installation process, and the flange structure can uniformly transmit the load of the tower body to the base column 5, improving the overall load transmission efficiency;

[0052] The top and bottom of the universal sliding sleeve 8 are provided with turbulence devices;

[0053] The turbulence device comprises a turbulence rotating seat 18 rotatably sleeved on the universal sliding sleeve 8, and a group of wind blades 19 in a circumferential array are installed on the turbulence rotating seat 18;

[0054] Specifically, the number of the wind blades 19 is six;

[0055] When the mountain wind acts on the wind blades 19 of the turbulence device, it will drive the turbulence rotating seat 18 to rotate at high speed around the universal sliding sleeve 8. On the one hand, the rotating turbulence rotating seat 18 can disrupt the airflow distribution around the universal sliding sleeve 8, reduce the lateral impact force of the stable strong wind on the universal sliding sleeve 8, and avoid fatigue damage of the connection part between the universal sliding sleeve 8 and the base column 5 due to long-term wind load extrusion;

[0056] On the other hand, the turbulence rotating seat 18 can synchronously remove the salt spray crystals, dust and other impurities attached to the surface of the universal sliding sleeve 8 during the rotating process, realizing the dual functions of wind control and automatic cleaning, without the need for additional cleaning devices or manual maintenance. Moreover, the driving mode of the wind blades 19 does not consume electric energy, which meets the energy-saving needs of the mountain wind power foundation. Compared with the traditional fixed protection structure, the wind stability is improved, and the operation and maintenance cost is reduced;

[0057] A sleeve ring 9 is embedded on the universal sliding sleeve 8, four universal hinge joints 10 are embedded on the sleeve ring 9, and four hydraulic push rods 11 are hinged on the base 1. The movable ends of the four hydraulic push rods 11 are fixedly connected with the four universal hinge joints 10, respectively;

[0058] When the electric control system determines that the base column 5 needs to be adjusted in posture based on the data of the inclination sensor 30 and the anemorumbometer 31, it will control the four hydraulic push rods 11 to perform extension and retraction actions, respectively. At this time, the universal hinge joints 10 on the sleeve ring 9 can flexibly adapt to the angle change of the hydraulic push rods 11 in the extension and retraction process, avoiding rigid pulling between the hydraulic push rods 11 and the universal sliding sleeve 8;

[0059] Meanwhile, the coordinated extension and retraction of the four hydraulic push rods 11 can drive the universal sliding sleeve 8 to realize lifting along the base column 5 or multidimensional rotation around the universal ball seat 4, so as to accurately correct the inclination angle of the base column 5 and real-time offset the disturbance of the strong wind to the base column 5;

[0060] The structure breaks through the limitation of traditional rigid support that cannot be dynamically adjusted, and realizes real-time and flexible adjustment of the posture of the base column 5 through the combination of hydraulic drive and universal adaptation, which not only guarantees the vertical stability of the base column 5, but also avoids the stress concentration caused by rigid adjustment, prolongs the service life of the hydraulic push rod 11 and the universal sliding sleeve 8;

[0061] The bottom surface of the base 1 is provided with a double-shaft driving platform, the double-shaft driving platform is connected with a double-shaft moving hanging seat 12, the hanging seat 12 is provided with a counterweight cylinder 13 for dynamically adjusting the counterweight, and the bottom of the base column 5 is provided with an electric control system.

[0062] The electric control system controls the extension and retraction of the hydraulic push rod 11, the weight adjustment of the counterweight cylinder 13 and the displacement of the double-shaft driving platform in real time according to the detection data of the wind speed and direction instrument 31 and the inclination sensor 30;

[0063] The double-shaft driving platform comprises an axial screw rod transmission module 22 mounted on the base 1, the axial screw rod transmission module 22 is connected with a shaft moving frame 23, the shaft moving frame 23 is provided with a longitudinal screw rod transmission module 24, and the longitudinal screw rod transmission module 24 is in transmission connection with the hanging seat 12.

[0064] Two tension sensors 25 are mounted between the counterweight cylinder 13 and the hanging seat 12, a liquid storage cavity 35 is formed in the counterweight cylinder 13, a pump body 26 is mounted on the bottom surface of the counterweight cylinder 13, the liquid outlet port of the pump body 26 is in communication with the liquid storage cavity 35, the liquid suction port of the pump body 26 is communicated with a pump liquid hose 27, and the bottom of the counterweight cylinder 13 is communicated with an electromagnetic drain valve 34.

[0065] During construction, a ring-shaped rainwater collection ditch is additionally arranged around the base 1, a geotextile filter layer is arranged at the bottom of the collection ditch, and the collection ditch is connected to a stainless steel liquid storage tank fixed on the side of the concrete pile foundation 2 through a water guide pipe, and the capacity of the stainless steel liquid storage tank is designed according to the counterweight requirement;

[0066] The pump liquid hose 27 is preferentially connected to the rainwater collection tank, when the liquid level in the tank is lower than a threshold value, the PLC controller triggers the replenishment valve of the liquid storage tank to realize stable water replenishment of the counterweight cylinder 13;

[0067] The liquid storage tank pre-stores antifreeze to avoid freezing in winter, and the collected water in the liquid storage tank is pre-stored water;

[0068] The electromagnetic drain valve 34 at the bottom of the counterweight cylinder 13 is connected with a drain hose to guide the excess liquid to a mountain drainage system to avoid water immersion of the pile foundation;

[0069] The counterweight cylinder 13 is a flexible cylinder shell made of fluororubber, the bottom end of the flexible cylinder shell is provided with a counterweight plate, and the pump body 26 is arranged at the bottom center position of the counterweight plate;

[0070] When the counterweight needs to be adjusted, the electric control system controls the pump body 26 at the bottom of the counterweight plate to extract the pre-stored water from the liquid storage cavity 35 through the pump liquid hose 27 according to the current counterweight data fed back by the tension sensor 25. The flexible cylinder shell made of fluororubber material will expand radially and axially synchronously with the increase of the liquid storage volume, adapting to different counterweight requirements, while the bottom end of the counterweight plate can ensure that the flexible cylinder shell always maintains a vertical state during the liquid filling process by using its own weight, avoiding the shaking of the cylinder shell due to the shift of the center of gravity. When the counterweight needs to be reduced, the electromagnetic drain valve 34 can quickly drain the pre-stored water, and the flexible cylinder shell automatically shrinks and resets;

[0071] Compared with the traditional rigid counterweight cylinder 13, on the one hand, the flexible material and the liquid storage design realize the precise and dynamic adjustment of the counterweight weight, which can quickly adjust the basic gravity center according to the real-time wind and wave conditions, and improve the anti-overturning ability. On the other hand, fluororubber has excellent corrosion resistance and aging resistance, solving the problem of easy corrosion and leakage of the rigid metal counterweight cylinder 13, and the setting of the counterweight plate further improves the structural stability of the counterweight cylinder 13, avoiding the shift of the counterweight cylinder 13 under the impact of mountain wind;

[0072] The electric control system includes an electric control box 28 and a sensor mounting seat 29 installed on the base column 5. The electric control box 28 is internally provided with a storage battery and a PLC controller, the power supply end of the storage battery is electrically connected with the PLC controller, the sensor mounting seat 29 is provided with an inclination sensor 30, a wind speed and direction instrument 31 and an ultrasonic ranging probe group 32. The data ends of the tension sensor 25, the inclination sensor 30, the wind speed and direction instrument 31 and the ultrasonic ranging probe group 32 are all connected with the PLC controller through data lines.

[0073] The tension sensor 25, the inclination sensor 30, the wind speed and direction instrument 31, the ultrasonic ranging probe group 32 and the PLC controller can be customized or selected according to actual needs;

[0074] The electric control box 28 adopts an IP67 level waterproof shell, internally provided with a lightning protection module and a dehumidifier, and the grounding resistance of the electric control box 28 is less than or equal to 4Ω;

[0075] The storage battery is selected to be a low-temperature resistant gel battery, and the PLC controller is additionally provided with an electromagnetic shielding cover;

[0076] The sensor mounting seat 29 is made of stainless steel, and the external sensors such as the inclination sensor 30 and the wind speed and direction instrument 31 all adopt an IP65 level protection. The sensor cable is laid through a galvanized steel pipe to avoid lightning strike or rainwater erosion;

[0077] The counterweight cylinder 13 is a flexible cylinder shell made of fluororubber material, and the bottom end of the flexible cylinder shell is provided with a counterweight plate. The pump body 26 is arranged at the center position of the bottom surface of the counterweight plate;

[0078] The counterweight cylinder 13 is lined with a shaped spring;

[0079] The connection between the hydraulic column 3 and the concrete pile foundation 2, and the connection between the hydraulic push rod 11 and the base 1 are both embedded with stress sensors 33, and the data terminals of the stress sensors 33 are connected with the PLC controller.

[0080] The top end of the concrete pile foundation 2 is provided with a mounting groove matched with the bottom of the hydraulic column 3, and an annular embedding groove is formed in the inner wall of the mounting groove. The stress sensor 33 is an annular strain gauge type sensor, the outer wall of which is fixedly connected with the annular embedding groove in an interference fit, and the inner wall is attached to the outer wall of the bottom of the hydraulic column 3. The attachment surfaces of the stress sensor 33, the annular embedding groove and the hydraulic column 3 are all coated with epoxy sealant.

[0081] A hinged lug plate for hinging the hydraulic push rod 11 is arranged on the base 1. A sheet-shaped embedding groove is formed in the inner wall of the hinged lug plate. The stress sensor 33 is a sheet-shaped strain gauge type sensor, one side of which is fixed in the sheet-shaped embedding groove by welding, and the other side is attached to the outer wall of the hinge shaft at the end of the hydraulic push rod 11. A metal protective cover is arranged on the outer side of the hinged lug plate corresponding to the position of the sheet-shaped embedding groove. The metal protective cover is detachably connected with the hinged lug plate by bolts. Rubber sealing rings are arranged on the attachment surfaces of the metal protective cover and the hinged lug plate.

[0082] The anemometer 31 collects the wind speed and direction data of the mountainous area in real time. The PLC controller compares the data with the preset 3-level wind resistance strategy threshold value, adjusts the operating state of the counterweight cylinder 13, the hydraulic push rod 11 and the universal sliding sleeve 8 accordingly, and simultaneously optimizes the gravity center distribution of the biaxial driving platform.

[0083] When the anemometer 31 feedbacks that the wind speed is in the safe interval, the PLC controller determines that no high-strength wind resistance measures are needed, controls the electromagnetic drain valve 34 of the counterweight cylinder 13 to remain in the closed state, and monitors the weight of the counterweight in real time through the tension sensor 25. When the weight is lower than the basic counterweight value, the pump body 26 is controlled to extract a small amount of liquid to supplement it, so as to maintain the amount of the counterweight cylinder 13 at the basic counterweight value, avoid redundant counterweight to increase the structural load, control the hydraulic push rod 11 to be in a flexible adjustment mode, and maintain the oil pressure in the hydraulic push rod 11 at a low pressure value.

[0084] When the anemometer 31 feedbacks that the wind speed increases, the PLC controller triggers the wind resistance enhancement strategy. When the wind resistance enhancement strategy is executed, the pump body 26 of the counterweight cylinder 13 is sent a command to control the pump body 26 to extract the pre-stored water through the pump liquid hose 27 and inject it into the liquid storage cavity 35. The tension sensor 25 feedbacks the weight of the counterweight in real time until the weight reaches the wind level matching value. At the same time, the axial lead screw transmission module 22 and the longitudinal lead screw transmission module 24 of the biaxial driving platform are controlled to move the hanging seat 12 to the upwind offset position, so as to offset part of the wind load by shifting the gravity center.

[0085] At the same time, according to the wind direction data, the two hydraulic push rods 11 on the leeward side are moderately elongated, and the two hydraulic push rods 11 on the windward side are moderately shortened, actively adjusting the universal sliding sleeve 8 to the leeward tilt preset angle, and offsetting the lateral thrust of the wind on the base column 5 in advance.

[0086] The wind-driven spoiler device rotates at high speed, and the PLC controller does not need additional intervention to achieve wind reduction and automatic cleaning by using natural wind power.

[0087] The wind-driven blade 19 is sprayed with a ceramic wear-resistant coating, and the edge of the wind-driven blade 19 is designed to be streamlined to reduce wear caused by wind and sand impact;

[0088] At the same time, a dustproof sealing ring is installed at the connection between the spoiler rotating seat 18 and the universal sliding sleeve 8 to prevent sand and dust from entering the gap and affecting the rotation flexibility;

[0089] When the anemorumbus 31 feeds back extreme wind conditions, the PLC controller starts the extreme wind resistance mode:

[0090] Extreme wind conditions refer to wind speed ≥25m / s;

[0091] In extreme wind resistance mode, the PLC controller controls the pump body 26 to full-load liquid pumping until the tension sensor 25 feeds back that the weight of the counterweight cylinder 13 reaches the rated maximum value, and at the same time, the double-shaft driving platform moves the hanging seat 12 to the base 1 directly below, the electromagnetic drain valve 34 is completely closed, and the counterweight is locked;

[0092] At the same time, control four hydraulic push rods 11 to apply pre-tightening force synchronously, firmly fix the base column 5 at the center of the universal ball seat 4, when the wind direction remains unchanged and the wind force exceeds 12 levels, the PLC controller additionally controls the hydraulic column 3 to shorten slightly, reduces the height of the base 1, reduces the moment of force of the wind on the base column 5, and at the same time, through the stress sensor 33, the stress at the connection of the hydraulic push rod 11 is monitored in real time, to avoid excessive locking leading to stress exceeding the standard.

[0093] The ultrasonic ranging probe group 32 collects the vertical distance between its ranging end and the mountain surface in real time, and the PLC controller controls the extension and retraction of the hydraulic column 3 at the top of the four concrete pile foundations 2 to ensure that the base 1 is always in a horizontal state;

[0094] In actual layout, the measurement and control end of the ultrasonic ranging probe group 32 is vertically arranged with the horizontal plane, and the measurement and control end should be arranged opposite to the ground;

[0095] The ultrasonic ranging probe group 32 includes four ultrasonic ranging sub-probes arranged in a circular array, and the horizontal deviation is calculated by four-point ranging;

[0096] The inclination sensor 30 monitors the inclination angle of the base column 5 in the X axis and the Y axis in real time. The PLC controller adjusts the posture of the universal sliding sleeve 8 through the hydraulic push rod 11 according to the inclination direction and the angle size, and moves the position of the counterweight cylinder 13 through the double-axis driving platform, so as to realize the closed-loop correction of the vertical posture of the base column 5.

[0097] When the inclination angle is less than or equal to 0.1°, it is determined to be normal fluctuation, only the data is recorded, and no adjustment is triggered.

[0098] When the inclination angle is greater than 0.1° and less than or equal to 0.5°, the posture of the universal sliding sleeve 8 is adjusted through the hydraulic push rod 11.

[0099] When the inclination angle is greater than 0.5°, the hydraulic push rod 11 and the double-axis driving platform are started to adjust cooperatively, and the posture and the gravity center are corrected at the same time.

[0100] When the inclination is in a single direction, the PLC controller calculates the inclination direction and the required correction amount, sends the extension command to the two hydraulic push rods 11 on the inclination side, and sends the shortening command to the two hydraulic push rods 11 on the correction side.

[0101] During the adjustment process, the guide sliding block on the inner wall of the universal sliding sleeve 8 slides along the guide groove 20 of the base column 5 to limit the radial deviation, and the inclination sensor 30 feeds back the inclination angle in real time.

[0102] The stress sensor 33 collects the stress data of the key positions in real time. The PLC controller compares the data with the preset safety threshold, adjusts the load distribution, and optimizes the stress structure to avoid stress overload and connection failure.

[0103] The outer surfaces of the base column 5, the hydraulic column 3, the base 1, the double-axis driving platform, and the hydraulic push rod 11 are coated with an epoxy glass flake coating.

[0104] In a preferred embodiment, the thickness of the epoxy glass flake coating is 180 microns.

[0105] The epoxy glass flake coating is formed by a high-pressure airless spraying process.

[0106] A construction method of a wind power foundation, comprising the following steps:

[0107] SS01, four concrete pile foundations 2 are constructed, a hydraulic column 3 is installed at the top of each concrete pile foundation 2, and an expansion support is arranged on each concrete pile foundation 2;

[0108] SS02, the base 1 is hinged to the movable ends of the four hydraulic columns 3, and the installation of the base 1 is completed;

[0109] SS03, a universal ball seat 4 is embedded at the center position of the base 1, a base column 5 with a limiting disc 6 is installed on the universal ball seat 4, and a set of limiting springs 7 are installed between the limiting disc 6 and the base 1.

[0110] SS04, sliding the universal sliding sleeve 8 on the base column 5, setting the spoiler on the top and bottom of the universal sliding sleeve 8, embedding the sleeve ring 9 on the universal sliding sleeve 8, and embedding the four universal hinge joints 10 on the sleeve ring 9;

[0111] SS05, hinging the four hydraulic push rods 11 on the base 1, and fixing the movable ends of the four hydraulic push rods 11 with the four universal hinge joints 10 respectively;

[0112] SS06, installing the double-shaft driving platform on the bottom surface of the base 1, connecting the double-shaft moving hanging seat 12 on the double-shaft driving platform, and setting the counterweight cylinder 13 with the counterweight dynamic adjustment on the hanging seat 12;

[0113] SS07, installing the electric control system on the bottom of the base column 5, connecting the anemorumbometer 31 and the inclination sensor 30 with the electric control system, so that the electric control system can control the hydraulic push rod 11 extension and retraction, the counterweight cylinder 13 weight adjustment, and the double-shaft driving platform displacement according to the detection data of the two.

[0114] The above only describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wind power foundation comprising a base (1) and four concrete pile foundations (2), characterized in that, The top end of each concrete pile foundation (2) is provided with a hydraulic column (3), and each concrete pile foundation (2) is provided with an expansion support, the movable end of each hydraulic column (3) is hinged to the base (1), the central position of the base (1) is embedded with a universal ball seat (4), the top surface of the universal ball seat (4) is provided with a base column (5), the bottom of the base column (5) is provided with a limiting disc (6), a group of limiting springs (7) are arranged between the limiting disc (6) and the base (1), a universal sliding sleeve (8) is slidably arranged on the base column (5), and the top and bottom of the universal sliding sleeve (8) are provided with turbulence devices; The turbulence device comprises a turbulence rotating seat (18) rotatably arranged on the universal sliding sleeve (8), and a group of wind moving blades (19) are arranged in a circumferential array on the turbulence rotating seat (18); The universal sliding sleeve (8) is embedded with a sleeve ring (9), the sleeve ring (9) is embedded with four universal hinge joints (10), the base (1) is hinged with four hydraulic push rods (11), the movable ends of the four hydraulic push rods (11) are fixedly connected with the four universal hinge joints (10), the bottom surface of the base (1) is provided with a double-shaft driving platform, the double-shaft driving platform is connected with a double-shaft movable hanging seat (12), the hanging seat (12) is provided with a counterweight cylinder (13) for dynamically adjusting the counterweight, the bottom of the base column (5) is provided with an electric control system, the electric control system controls the extension and retraction of the hydraulic push rod (11), the weight adjustment of the counterweight cylinder (13) and the displacement of the double-shaft driving platform in real time according to the detection data of the wind speed and direction instrument (31) and the inclination sensor (30); The double-shaft driving platform comprises an axial screw rod transmission module (22) arranged on the base (1), the axial screw rod transmission module (22) is connected with a shaft moving frame (23), the shaft moving frame (23) is provided with a longitudinal screw rod transmission module (24), and the longitudinal screw rod transmission module (24) is in transmission connection with the hanging seat (12); A group of tension sensors (25) are arranged between the counterweight cylinder (13) and the hanging seat (12), a liquid storage cavity (35) is formed in the counterweight cylinder (13), a pump body (26) is arranged on the bottom surface of the counterweight cylinder (13), the liquid outlet port of the pump body (26) is in communication with the liquid storage cavity (35), and the liquid inlet port of the pump body (26) is in communication with a pump liquid hose (27); The electric control system comprises an electric control box (28) and a sensor mounting seat (29) arranged on the base column (5), a storage battery and a PLC controller are respectively arranged in the electric control box (28), the power supply end of the storage battery is electrically connected with the PLC controller, the inclination sensor (30), the wind speed and direction instrument (31) and the ultrasonic ranging probe group (32) are respectively arranged on the sensor mounting seat (29), and the data ends of the tension sensor (25), the inclination sensor (30), the wind speed and direction instrument (31) and the ultrasonic ranging probe group (32) are in data connection with the PLC controller through data lines.

2. A wind power foundation according to claim 1, characterized in that: The expansion support comprises a top ring (14) and a bottom ring (15) sleeved on the concrete pile foundation (2), a plurality of locking bolts (16) matched with the concrete pile foundation (2) are threadedly installed on the top ring (14) and the bottom ring (15), a plurality of angle adjusting arms (17) are hinged on the top ring (14), and a supporting arm (36) is hinged on the bottom ring (15) at a position corresponding to each angle adjusting arm (17), and each angle adjusting arm (17) is hinged with the corresponding supporting arm (36).

3. A wind power foundation according to claim 1, characterized in that: A group of guide sliding blocks are installed on the inner wall of the universal sliding sleeve (8), a guide groove (20) in sliding connection with the guide sliding blocks is formed on the base column (5) at a position corresponding to each guide sliding block, and a flange connecting disc (21) is installed on the top end of the base column (5).

4. A wind power foundation according to claim 1, characterized in that: The bottom of the counterweight cylinder (13) is communicated with an electromagnetic drain valve (34).

5. A wind power foundation according to claim 1, characterized in that: Stress sensors (33) are embedded at the connection between the hydraulic column (3) and the concrete pile foundation (2) and the connection between the hydraulic push rod (11) and the base (1), and the data end of the stress sensor (33) is in data connection with the PLC controller.

6. A wind power foundation according to claim 5, characterized in that: The outer surfaces of the base column (5), the hydraulic column (3), the base (1), the double-shaft driving platform and the hydraulic push rod (11) are coated with an epoxy glass flake coating, the thickness of the epoxy glass flake coating is 150-200 microns, the counterweight cylinder (13) is a flexible cylinder shell made of fluororubber, a counterweight plate is arranged at the bottom end of the flexible cylinder shell, and the pump body (26) is arranged at the bottom surface center position of the counterweight plate.

7. A method of constructing a wind power foundation according to any of claims 1-6, characterized in that, The method comprises the following steps: SS01, four concrete pile foundations (2) are constructed, a hydraulic column (3) is installed at the top end of each concrete pile foundation (2), and an expansion support is arranged on each concrete pile foundation (2); SS02, the base (1) is hinged with the movable ends of the four hydraulic columns (3), and the installation of the base (1) is completed; SS03, a universal ball seat (4) is embedded at the center position of the base (1), a base column (5) with a limiting disc (6) is installed on the universal ball seat (4), and a group of limiting springs (7) are installed between the limiting disc (6) and the base (1); SS04, a universal sliding sleeve (8) is sleeved and slid on the base column (5), a turbulence device is arranged at the top and bottom of the universal sliding sleeve (8), a sleeve ring (9) is embedded on the universal sliding sleeve (8), and four universal hinges (10) are embedded on the sleeve ring (9); SS05, four hydraulic push rods (11) are hinged on the base (1), and the movable ends of the four hydraulic push rods (11) are fixedly connected with the four universal hinges (10) respectively; SS06, a double-shaft driving platform is installed on the bottom surface of the base (1), a double-shaft movable suspension seat (12) is connected on the double-shaft driving platform, and a counterweight cylinder (13) for dynamically adjusting the counterweight is arranged on the suspension seat (12). SS07, install the electric control system at the bottom of the base column (5), connect the anemorumbometer (31) and the tilt sensor (30) with the electric control system, so that the electric control system can control the hydraulic push rod (11) extension and retraction, the counterweight cylinder (13) weight adjustment and the double-shaft driving platform displacement according to the detection data of the two.

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