Wind-proof and sand-proof barrier prepared from retired fan blade and manufacturing method of wind-proof and sand-proof barrier

Abstract

The barrier is formed by splicing a plurality of wind blocking units, each unit comprises an H-shaped steel stand column and a sand blocking plate cut by the retired fan blade, the sand blocking plate is inserted into a stand column flange gap and is provided with a rubber cushion layer, and long-strip-shaped flow guide holes are formed in the surface of the sand blocking plate. The new section is coated with epoxy resin for sealing, and the original protective paint layer faces the windward side; a sand stabilization structure containing a waste steel plate tensioning plate is arranged on the buried portion of the stand column, the tensioning plate automatically opens to be meshed with sandy soil when the stand column is pressed into a foundation, and a condensation water collecting and guiding structure is arranged at the bottom of the sand blocking plate and can condense water vapor and guide water to the sandy soil around the tensioning plate. The manufacturing method comprises the steps of blade cutting and punching, new section sealing, sand stabilization and water collection structure assembling, stand column burying, sand baffle mounting and unit splicing. Cooperative high-value utilization of the retired fan blades and the waste steel plates is achieved, the structure is stable, installation and maintenance are convenient and fast, and the wind-proof and sand-proof and ecological improvement effects are achieved.

Description

Technical Field

[0001] This invention relates to the fields of wind and sand control engineering and solid waste resource utilization technology, and in particular to a method for preparing wind and sand barriers using retired wind turbine blades. Background Technology

[0002] Desertification and sandstorms are prominent problems in northern my country. Strong sandstorms can damage the regional ecological environment and pose a continuous threat to the structural safety of infrastructure such as railways and highways. Therefore, there is an urgent need for efficient and reliable sand control technologies to address this problem.

[0003] At the same time, the renewable energy industry is developing rapidly, and the wind turbines put into operation in the early stages have entered the decommissioning phase, generating a large number of decommissioned wind turbine blades. The core materials of these blades are composite materials such as glass fiber and epoxy resin, which are difficult to degrade naturally. If they are disposed of by traditional landfill methods, they will occupy land resources for a long time and may also pollute the soil and groundwater. If they are disposed of by incineration, they will produce harmful gases, causing irreversible damage to the ecological environment, and this is also a huge waste of resources.

[0004] Currently, there are many bottlenecks in the resource utilization of retired wind turbine blades: if they are simply crushed and used as building materials, it is a low-value-added utilization and cannot absorb the ever-increasing amount of scrapped blades; if the fibers are recovered through high-temperature pyrolysis or chemical solvent dissolution, although higher-value materials can be obtained, there are problems such as high energy consumption, harsh process conditions, high equipment requirements, and easy generation of secondary pollution, making industrial application difficult and costly. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a method for preparing windbreak and sand-blocking barriers using retired wind turbine blades. On the one hand, it provides a new way for high-value and large-scale recycling of retired wind turbine blades, alleviating the environmental pressure they bring; on the other hand, it provides a structurally stable and weather-resistant windbreak and sand-blocking facility that effectively blocks wind and sand, protecting the regional ecological environment and infrastructure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A windbreak and sand-blocking barrier made from retired wind turbine blades includes multiple parallel windbreak units. Each windbreak unit includes an H-shaped steel column and a sand-blocking plate. The sand-blocking plate is cut from retired wind turbine blades and inserted into the flange gaps of adjacent H-shaped steel columns. An EPDM rubber pad is provided on the contact surface between the sand-blocking plate and the H-shaped steel column. The top edge of the sand-blocking plate is fastened to the top of the H-shaped steel column with angle steel and filler plates and bolts. Multiple elongated guide holes are opened on the surface of the sand-blocking plate. The cut and drilled surfaces of the sand-blocking plate are coated with a sealed protective film formed by the curing of epoxy resin. The side of the sand-blocking plate with the original outer protective coating layer facing the windward side.

[0007] Furthermore, the thickness of the sand baffle is 5 to 10 centimeters, its length is 2 meters, its height is 1 meter, and the depth of the insertion into the flange of the H-shaped steel column on both sides is 7 centimeters; the size of the long strip-shaped guide hole is 30 centimeters long and 12 centimeters wide, the spacing between adjacent guide holes is 8 centimeters, and the porosity of the sand baffle is controlled between 30% and 50%.

[0008] Furthermore, the total height of the H-beam steel column is 1.6 meters to 2.5 meters, and its lower end is buried in the foundation at a depth of 0.5 meters to 0.9 meters; the new cross-section covered by the epoxy resin sealant protective film includes the leeward side of the sand baffle, the four edges of the plate, and the inner wall of the guide hole.

[0009] Furthermore, the portion of the H-shaped steel column embedded in the foundation is equipped with a sand-stabilizing structure. This structure includes a fixed sleeve, a sliding sleeve, a top block, and several tension plates. The fixed sleeve is fixedly connected to the H-shaped steel column, while the sliding sleeve and top block are slidably connected to it. The tension plates are made from scrap steel plates, with hooks at their ends, and are fixed in a ring shape to the sliding sleeve. A conical blocking part is fixedly connected to the bottom of the top block. As the H-shaped steel column moves downward, the blocking part, under the reverse action of the foundation, pushes the top block upward, causing it to open the tension plates and insert them into the nearby sand. The fixed sleeve limits the upward movement of the sliding sleeve, preventing it from detaching from the H-shaped steel column. The hooks on the tension plates increase the contact area with the sand, enhancing the connection strength between the sand-stabilizing structure and the foundation sand, further strengthening the installation stability of the H-shaped steel column and preventing it from tilting or collapsing under strong winds and sandstorms.

[0010] Furthermore, a condensation plate and a guide plate are fixedly connected to the bottom of the sand-blocking plate. The guide plate directs the water condensed on the condensation plate to the H-shaped steel columns at both ends. A water collection trough is fixedly connected to the H-shaped steel columns, and a water guide pipe corresponding to the tensioning plate is fixedly connected to the water collection trough. A water guide groove is formed on the tensioning plate, located at the end of the water guide pipe, to introduce water from the water guide pipe into the sand near the tensioning plate, thereby increasing the moisture content of the sand and the tension on the tensioning plate. The condensation plate can utilize the diurnal temperature difference in the windy and sandy area to condense water vapor in the air into liquid water, achieving natural water collection. The condensed water is collected in the water collection trough by the guide plate and then seeps into the sand around the tensioning plate through the water guide pipe and the water guide groove. This not only improves the cohesion and density of the sand, enhancing the sand-fixing effect, but also increases the wrapping tension of the sand on the tensioning plate through water infiltration, further improving the stability of the columns.

[0011] The present invention also provides a method for manufacturing the above-mentioned wind and sand barrier, comprising the following steps: Step S1: Select a section of the retired wind turbine blade with an intact structure and a good outer protective coating, and cut it into rectangular plates using a high-pressure water jet. Step S2: Use a high-pressure water jet to create multiple elongated guide holes on the rectangular plate; Step S3: Apply epoxy resin to the cut and drilled surfaces of the rectangular plate and cure it to form a sealing protective film to obtain the sand baffle. Step S4: Position the H-shaped steel columns according to the designed spacing and bury their lower ends in the foundation; Step S5: Insert the sand baffle vertically into the flange gap of the adjacent H-shaped steel column with the original outer protective coating layer facing the windward side, and pre-install an EPDM rubber pad layer on the contact surface between the sand baffle and the H-shaped steel column. Step S6: Install angle steel and filler plate on the upper edge of the sand barrier plate, and use bolts to fasten the angle steel to the H-shaped steel column to complete the installation of a single windbreak unit; multiple windbreak units are spliced ​​together to form a windproof and sand-blocking barrier.

[0012] Furthermore, in the fabrication of the windbreak and sand-blocking barrier with a sand-fixing structure, the sand-fixing structure assembly step S0 is included before step S4: Step S01, several tension plates are cut from waste steel plates and hooks are machined at the ends of the tension plates. Fixed sleeves are fixedly connected to the H-shaped steel column in a predetermined section embedded in the foundation. At the same time, the sliding sleeve and the top block are slidably connected to the predetermined section, with the top block located below the sliding sleeve; Step S02, several tension plates are fixedly fixed in a ring on the sliding sleeve, and a conical blocking part is fixedly connected to the bottom of the top block, completing the assembly of the sand-fixing structure on the H-shaped steel column; In step S4, when the H-shaped steel column with the sand-fixing structure is pressed down into the foundation, the sand in the foundation forms a reverse force on the conical blocking part, pushing the top block to move upward along the H-shaped steel column. The top block pushes the sliding sleeve upward, causing the tension plates to open, so that the tension plates are inserted into the sand near the H-shaped steel column until the sliding sleeve abuts against the fixed sleeve, completing the tensioning and fixing of the sand-fixing structure.

[0013] Furthermore, the fabrication of the windbreak and sand-blocking barrier with a condensate collection and water guiding structure also includes an assembly step for the condensate collection and water guiding structure, specifically: Step A1, a condensate plate and a guide plate are fixedly connected to the bottom of the sand-blocking plate obtained in Step S3, with the water outlet of the guide plate facing the installation positions of the H-shaped steel columns at both ends of the sand-blocking plate. The guide plate is inclined to ensure that the condensate can flow smoothly towards the H-shaped steel columns; Step A2, a water collection trough is fixedly connected to the H-shaped steel columns obtained in Step S01, with the position of the water collection trough corresponding to the water outlet of the guide plate. A water guide pipe is fixedly connected to the water collection trough, with the end of the water guide pipe corresponding to the position of the tensioning plate, and the water outlet of the water guide pipe extending above the water guide trough of the tensioning plate; Step A3, a water guide trough is opened on the tensioning plate obtained in Step S01, with the water guide trough located below the end of the corresponding water guide pipe, completing the assembly of the condensate collection and water guiding structure.

[0014] Regarding equipment selection, the high-pressure water jet used in steps (1) and (2) can be a CNC high-pressure water jet cutting machine of model ABWJ-4020, whose working pressure can be adjusted to 300MPa to 400MPa, which can achieve precise cutting of wind turbine blade composite materials; the bolts used in step (6) can be M16 hot-dip galvanized high-strength bolts, whose tensile strength grade is 8.8, which can adapt to harsh outdoor wind and sand and corrosion environment; the connection between the fixing sleeve of the sand-fixing structure and the H-shaped steel column can be done by welding, and the welded area should be treated with anti-rust and anti-corrosion after welding; the tension plate and the sliding sleeve can be fixed by welding, and the elasticity and plasticity of the tension plate can be used to ensure that the tension plate can be opened smoothly.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Achieve high-value utilization of solid waste: Decommissioned wind turbine blades that are difficult to process are applied to the field of wind and sand control. At the same time, the tensioning plate is made from the cutting of waste steel plates, realizing the synergistic disposal of various solid wastes and forming a new model of "treating harm with waste". This not only disposes of solid waste, but also reduces the raw material cost of windbreak and sand barrier.

[0016] 2. Excellent structural performance: It fully utilizes the high strength, weather resistance, wind erosion resistance and aging resistance of the original composite materials of retired wind turbine blades. At the same time, the design of the flow guide hole reduces wind pressure and the sealing process enhances durability. The newly added sand-fixing structure greatly improves the connection strength between the H-shaped steel column and the foundation, effectively preventing the column from tilting or falling. The condensate collection and water guiding structure realizes natural water collection and wets the surrounding sand, further enhancing the sand-fixing effect and the stability of the column fixation, and comprehensively ensuring the long-term stable operation of the barrier.

[0017] 3. Convenient installation and maintenance: The modular windbreak unit design allows for quick plug-in installation, and each damaged sand baffle can be replaced independently without disassembling the overall structure; the sand-fixing structure automatically opens and fixes itself as the column is pressed into the foundation, eliminating the need for additional tensioning equipment; the condensate collection and water guiding structure is prefabricated, making installation and operation simple and significantly reducing the difficulty and cost of later maintenance.

[0018] 4. Significant ecological benefits: The condensation and water collection structure utilizes natural temperature differences to achieve water vapor condensation and water collection without the need for an external water source. It can increase the moisture content of sand and soil, improve the surrounding micro-ecological environment, and enhance the sand fixation capacity of sand and soil, achieving the dual effects of windbreak and sand blocking and ecological water replenishment and improvement. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the main structure of the windproof and sand-blocking barrier of the present invention; Figure 2 This is a cross-sectional view of the side panel of the windproof and sand-blocking barrier of the present invention; Figure 3 This is a schematic diagram of the sand-fixing structure of the present invention.

[0020] In the diagram: 1. Column; 2. Sand baffle; 3. Cushion layer; 4. Angle steel; 5. Bolt; 6. Drainage hole; 7. Surface layer; 8. Core layer; 9. Epoxy resin adhesive; 10. Filler plate; 11. Underground layer; 12. Fixing sleeve; 13. Sliding sleeve; 14. Top block; 15. Tensioning plate; 16. Hook part; 17. Blocking part; 18. Condensation plate; 19. Drainage plate; 20. Water collection trough; 21. Water guide pipe; 22. Water guide channel. Detailed Implementation

[0021] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 ,2 As shown, the windbreak and sand-blocking barrier of the present invention consists of multiple parallel windbreak units, each windbreak unit including an H-shaped steel column 1 and a sand-blocking plate 2; as Figure 2 As shown, the contact surface between the sand baffle 2 and the H-shaped steel column 1 is provided with an EPDM rubber pad 3. The top of the H-shaped steel column 1 is fastened to the upper edge of the sand baffle 2 by angle steel 4, filler plate 10 and bolts 5. The surface of the sand baffle 2 is provided with a long strip-shaped guide hole 6. The cut surface is coated with a sealing film formed by epoxy resin glue 9. The structure of the internal core layer 8 is exposed after cutting, while the original dense surface layer 7 and the outer protective paint are retained and face the windward side. The lower end of the H-shaped steel column 1 is buried underground 11.

[0023] like Figure 3 As shown, the portion of the H-shaped steel column 1 buried underground 11 is equipped with a sand-stabilizing structure. The sand-stabilizing structure includes a fixed sleeve 12, a sliding sleeve 13, a top block 14, and several tension plates 15. The fixed sleeve 12 is welded to the H-shaped steel column 1. The sliding sleeve 13 and the top block 14 are slidably fitted onto the H-shaped steel column 1. The top block 14 is located below the sliding sleeve 13. The tension plates 15 are made by cutting scrap steel plates, with a bent hook 16 at the tail end. The tension plates 15 are annularly hinged to the sliding sleeve 13. A conical blocking part 17 is welded to the bottom of the top block 14. The conical surface of the blocking part 17 faces downward. When the H-shaped steel column 1 is pressed downward into the underground 11, the reverse force of the sand on the blocking part 17 pushes the top block 14 upward. The top block 14 pushes the sliding sleeve 13 upward and causes the tension plates 15 to open, so that the tension plates 15 are inserted into the surrounding sand until the sliding sleeve 13 abuts against the fixed sleeve 12, completing the tensioning and fixing.

[0024] like Figure 1 As shown, a condensation plate 18 and a guide plate 19 are welded to the bottom of the sand baffle 2. The guide plate 19 is inclined and its outlet faces the H-shaped steel column 1. A water collection trough 20 is welded on the H-shaped steel column 1. The opening of the water collection trough 20 is connected to the outlet of the guide plate 19. A water guide pipe 21 is connected to the water collection trough 20. The water guide pipe 21 corresponds to the tension plate 15. A water guide groove 22 is opened on the tension plate 15 along its length. The outlet of the water guide pipe 21 extends to the top of the water guide groove 22. The water condensed on the condensation plate 18 flows into the water collection trough 20 through the guide plate 19, and then into the water guide groove 22 through the water guide pipe 21, and finally seeps into the sand around the tension plate 15.

[0025] In this embodiment, the specific parameters of the windbreak and sand-blocking barrier are as follows: the sand-blocking plate 2 is made by cutting retired wind turbine blades using an ABWJ-4020 CNC high-pressure water jet cutting machine. Its thickness is 5 cm, its length is 2 m, and its height is 1 m; the dimensions of the elongated guide hole 6 are 30 cm long and 12 cm wide, with an 8 cm spacing between adjacent guide holes, and the porosity of the sand-blocking plate 2 is 40%; the total height of the H-shaped steel column 1 is 2 m, its underground depth is 0.7 m, and its above-ground height is 1.3 m; the bolt 5 is an M16 grade 8.8 hot-dip galvanized high-strength bolt; the tensioning plate 15 of the sand-fixing structure is provided with 4 pieces, which are arranged in a cross-shaped ring on the sliding sleeve 13. The length of the tensioning plate 15 is 0.4 m, and the bending angle of the hook part 16 is 90°; the condensation plate 18 is a metal heat-conducting plate, and the contact area with the bottom of the sand-blocking plate 2 is 1.8 m × 0.2 m, and the tilt angle of the guide plate 19 is 30°.

[0026] The specific steps for manufacturing the aforementioned windbreak and sand-blocking barrier are as follows: (1) Select sections of retired wind turbine blades with intact structure and undamaged outer protective coating, and use ABWJ-4020 CNC high-pressure water jet cutting machine to cut them into rectangular plates with a length of 2 meters, a height of 1 meter, and a thickness of 5 centimeters. During the cutting process, the core layer 8 structure inside the blade is exposed.

[0027] (2) Using the same high-pressure water jet cutting machine, multiple elongated guide holes 6 are opened on the rectangular plate according to the design drawings. The size of the guide holes is 30 cm × 12 cm, and the distance between adjacent guide holes is 8 cm to ensure that the porosity of the plate is 40%.

[0028] (3) Prepare epoxy resin adhesive and apply it evenly to the leeward side, the four edges and the inner wall of the guide hole 6 of the rectangular plate to ensure that the adhesive fully penetrates each new section. After standing and curing for 24 hours, a continuous sealing protective film is formed to obtain the finished sand baffle 2. Weld a condensation plate 18 and an inclined guide plate 19 to the bottom of the sand baffle 2 so that the water outlet end of the guide plate 19 faces the column installation position at both ends of the sand baffle 2 to complete the prefabrication of the sand baffle.

[0029] (4) Prefabrication and assembly of sand-fixing structure and condensate collection and water-conducting structure: 4.1 Four tension plates 15 are made by cutting and bending waste steel plates. A 90° hook part 16 is processed at the tail end of each tension plate 15. Fixed sleeve 12 and sliding sleeve 13 matching H-shaped steel column 1 are selected. Fixed sleeve 12 is welded to the upper part of the preset section where H-shaped steel column 1 is buried underground. Sliding sleeve 13 and top block 14 are slidably fitted into the preset section in sequence, so that top block 14 is located below sliding sleeve 13. A conical blocking part 17 is welded to the bottom of top block 14. The four tension plates 15 are hinged in a cross shape to the outer wall of sliding sleeve 13 to complete the assembly of sand-fixing structure. 4.2 Weld a water collection trough 20 onto the H-shaped steel column 1 equipped with the sand-fixing structure, so that the position of the water collection trough 20 corresponds to the water outlet end of the guide plate 19 on the sand baffle 2; connect four water guide pipes 21 to the bottom of the water collection trough 20, so that the water guide pipes 21 correspond one-to-one with the tension plate 15, and the water outlet end of the water guide pipe 21 faces the tension plate 15; open a water guide groove 22 along the length direction on each tension plate 15, so that the water guide groove 22 is located below the water outlet end of the corresponding water guide pipe 21, and complete the assembly of the condensate collection and water guide structure.

[0030] (5) The H-shaped steel columns 1, which are positioned and assembled in the sand-prevention area at intervals of 2 meters, are driven into the ground 0.7 meters down using a pile driver. During the driving process, the underground sand forms a reverse force on the conical blocking part 17, pushing the top block 14 to move upward along the H-shaped steel column 1. The top block 14 pushes the sliding sleeve 13 upward, causing the four tensioning plates 15 to open simultaneously, so that the tensioning plates 15 are inserted into the sand near the H-shaped steel column 1 until the sliding sleeve 13 abuts against the fixed sleeve 12, thus completing the tensioning and fixing of the sand-fixing structure. This ensures that the height of the above-ground part of the H-shaped steel column 1 is 1.3 meters, which meets the installation height requirements of the sand-blocking plate 2.

[0031] (6) Insert the finished sand baffle 2 vertically into the flange gap of the two fixed H-shaped steel columns 1 with the original outer protective coating layer facing the windward side, ensuring that the insertion depth on both sides is 7 cm, and pre-lay a rubber pad layer 3 on the contact surface between the sand baffle 2 and the H-shaped steel column 1. At this time, the water outlet end of the guide plate 19 is connected to the groove of the water collection tank 20.

[0032] (7) Install angle steel 4 on the upper edge of sand baffle 2, fill the gap between angle steel 4 and sand baffle 2 with filler plate 10 and ensure tight fit, use M16 8.8 grade hot-dip galvanized high strength bolts 5 to fasten angle steel 4 to H-shaped steel column 1 to complete the installation of a single wind baffle unit; splice multiple wind baffle units in sequence to form a continuous wind and sand barrier.

[0033] The working principle of this wind and sand protection barrier is as follows: When the wind and sand airflow approaches, the original factory external protective paint and the dense surface layer 7 on the windward side can resist the direct erosion of wind and sand; part of the airflow passes through the long strip-shaped diversion holes 6 and passes through the sand retaining plate 2, greatly reducing the wind pressure load on the sand retaining plate 2 and preventing the structure from deforming or overturning due to strong wind; the rubber cushion layer 3 can buffer the vibration stress brought by the wind load and ensure the stability of the connection part; and the epoxy resin glue sealing film can prevent moisture from invading the inner core layer 8 of the blade, avoid the aging or corrosion of the core layer material, and extend the service life of the sand retaining plate.

[0034] The sand fixation structure supporting the H-shaped steel column 1 is fixed by the engagement of the tensioning plate 15 and the sandy soil, greatly increasing the contact area and connection strength between the column and the foundation. The hook part 16 further enhances the engagement effect of the tensioning plate 15 and the sandy soil, effectively preventing the H-shaped steel column 1 from tilting, toppling or floating under the lateral pressure of strong wind and sand; the temperature difference between day and night in the wind and sand area is relatively large. The condensation plate 18 uses its own heat conduction characteristics to condense the water vapor in the air into liquid water. The condensed water flows along the condensation plate 18 to the inclined diversion plate 19 under the action of gravity, and then is collected into the water collection tank 20 by the diversion plate 19. The water in the water collection tank 20 flows into the water diversion tank 22 of the tensioning plate 15 through the water diversion pipe 21, and finally slowly infiltrates into the sandy soil around the tensioning plate 15. On the one hand, it increases the water content and density of the sandy soil, enhances the cohesive sand fixation ability of the sandy soil, and improves the surrounding micro-ecological environment. On the other hand, it increases the wrapping tension and friction force of the sandy soil on the tensioning plate 15, further improving the fixing effect of the sand fixation structure and realizing the synergistic effect of wind and sand protection, sand fixation and column stability, and ecological improvement.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A method for preparing a windbreak and sand-blocking barrier using retired wind turbine blades, characterized in that, It includes multiple parallel windbreak units; each windbreak unit includes an H-shaped steel column and a sand baffle plate; the sand baffle plate is cut from the blades of a decommissioned wind turbine and is inserted into the flange gap of the adjacent H-shaped steel column. A rubber pad is provided on the contact surface between the sand baffle plate and the H-shaped steel column. The top edge of the sand baffle plate is fastened to the top of the H-shaped steel column with angle steel and filler plate and bolts; multiple elongated guide holes are opened on the surface of the sand baffle plate. The cut and drilled new cross-sections of the sand baffle plate are coated with a sealing protective film formed by epoxy resin adhesive curing. The side of the sand baffle plate with the original outer protective coating layer facing the windward side.

2. The method for preparing a windbreak and sand-blocking barrier using decommissioned wind turbine blades as described in claim 1, characterized in that, The portion of the H-shaped steel column embedded in the foundation is equipped with a sand-stabilizing structure. The sand-stabilizing structure includes a fixed sleeve, a sliding sleeve, a top block, and several tension plates. The fixed sleeve is fixedly connected to the H-shaped steel column, and the sliding sleeve and the top block are slidably connected to the H-shaped steel column. The tension plates are cut from scrap steel plates and have hooks at their tail ends. The tension plates are fixedly fixed to the sliding sleeve in a ring shape. The bottom of the top block is fixedly connected to a conical blocking part. As the H-shaped steel column moves downward, the blocking part pushes the top block upward under the reverse action of the foundation, causing the top block to push the tension plates open so that the tension plates can be inserted into the nearby sand.

3. The method for preparing a windbreak and sand-blocking barrier using decommissioned wind turbine blades as described in claim 2, characterized in that, The bottom of the sand baffle is fixedly connected to a condensation plate and a guide plate. The guide plate is used to direct the water condensed on the condensation plate to the H-shaped steel columns at both ends. A water collection trough is fixedly connected to the H-shaped steel columns. A water guide pipe corresponding to the tensioning plate is fixedly connected to the water collection trough. A water guide groove is opened on the tensioning plate. The water guide groove is located at the end of the water guide pipe and is used to introduce the water from the water guide pipe into the sand near the tensioning plate to increase the water content of the sand and the tension on the tensioning plate.

4. The method for preparing a windbreak and sand-blocking barrier using decommissioned wind turbine blades as described in claim 1, characterized in that, The sand-blocking plate has a cutting thickness of 5 to 10 centimeters, a length of 2 meters, a height of 1 meter, and the sand-blocking plate is inserted into the flange gap of the H-shaped steel column on both sides to a depth of 7 centimeters.

5. A method for preparing a windbreak and sand-blocking barrier using decommissioned wind turbine blades as described in claim 1, characterized in that, The elongated guide hole is 30 cm long and 12 cm wide, with an 8 cm spacing between adjacent elongated guide holes, and the porosity of the sand baffle is 30% to 50%.

6. The method for preparing a windbreak and sand-blocking barrier using decommissioned wind turbine blades as described in claim 1, characterized in that, The total height of the H-shaped steel column is 1.6 meters to 2.5 meters, and the depth of the lower end of the column buried in the foundation is 0.5 meters to 0.9 meters.

7. A method for manufacturing a windbreak and sand-blocking barrier using retired wind turbine blades, used to prepare the windbreak and sand-blocking barrier as described in claims 1, 4, 5, and 6, characterized in that, Includes the following steps: Step S1: Select a section of the retired wind turbine blade that has an intact structure and a good outer protective coating, and cut it into rectangular plates with a length of 2 meters, a height of 1 meter, and a thickness of 5 to 10 centimeters. Step S2: Multiple elongated guide holes are formed on the rectangular plate. The elongated guide holes are 30 cm long and 12 cm wide, and the spacing between adjacent elongated guide holes is 8 cm, so that the porosity of the rectangular plate is 30% to 50%. Step S3: Apply epoxy resin adhesive to the cut and drilled new cross-section of the rectangular plate and cure it to form a sealing protective film to obtain the sand baffle. Step S4: Select H-shaped steel columns with a total height of 1.6 meters to 2.5 meters, locate them in the sand-proof area according to the designed spacing, and bury the lower end of the H-shaped steel columns into the foundation to a depth of 0.5 meters to 0.9 meters. Step S5: Insert the sand baffle vertically into the flange gap of the adjacent H-shaped steel column with the original outer protective coating layer facing the windward side, so that the insertion depth of the sand baffle into the flange gap on both sides is 7 cm, and a rubber pad layer is pre-placed on the contact surface between the sand baffle and the H-shaped steel column. Step S6: Install angle steel and filler plate on the upper edge of the sand-blocking plate, and fasten the angle steel to the H-shaped steel column with bolts to complete the installation of a single windbreak unit; multiple windbreak units are spliced ​​together to form a windproof and sand-blocking barrier.

8. A method for manufacturing a windbreak and sand-blocking barrier using decommissioned wind turbine blades as described in claim 7, characterized in that, In steps S1 and S2, high-pressure water jets are used for cutting and drilling, and in step S6, hot-dip galvanized high-strength bolts are used.

9. A method for manufacturing a windbreak and sand-blocking barrier using decommissioned wind turbine blades as described in claim 7, used to manufacture the windbreak and sand-blocking barrier as described in claim 2, characterized in that, Before step S4, a sand-stabilizing structure assembly step S0 is also included: Step S01: Several tensioning plates are cut from waste steel plates and hooks are processed at the tail ends of the tensioning plates. Fixing sleeves are fixedly connected to the H-shaped steel column in the preset section where it is buried in the foundation. At the same time, the sliding sleeve and the top block are slidably connected in the preset section, with the top block located below the sliding sleeve. Step S02: Fix several tension plates in a ring on the sliding sleeve, and fix a conical blocking part at the bottom of the top block to complete the assembly of the sand-fixing structure on the H-shaped steel column. In step S4, when the H-shaped steel column equipped with the sand-fixing structure is pressed downward into the foundation, the sand in the foundation forms a reverse force on the conical blocking part, pushing the top block to move upward along the H-shaped steel column. The top block pushes the sliding sleeve upward, causing the tensioning plate to open, so that the tensioning plate is inserted into the sand near the H-shaped steel column.

10. A method for manufacturing a windbreak and sand-blocking barrier using decommissioned wind turbine blades as described in claim 9, characterized in that, The method for preparing the windproof and sand-blocking barrier as described in claim 3 is characterized in that it further includes an assembly step of a condensate collection and water-conducting structure, specifically: Step A1: A condenser plate and a guide plate are fixedly connected to the bottom of the sand baffle plate obtained in step S3, so that the water outlet end of the guide plate faces the H-shaped steel column installation position at both ends of the sand baffle plate. Step A2: A water collection tank is fixedly connected to the H-shaped steel column in step S01. The position of the water collection tank corresponds to the water outlet end of the guide plate. A water guide pipe is fixedly connected to the water collection tank. The end of the water guide pipe corresponds to the position of the tension plate. Step A3: A water guide groove is opened on the tension plate in step S01, so that the water guide groove is located below the end of the corresponding water guide pipe, thus completing the assembly of the condensate collection and water guide structure.

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