A sandstorm protection system and method for desert areas

Abstract

The present invention discloses a wind and sand protection system and method for desert areas. The protection system includes a photovoltaic device array, a one-way sand-blocking fence and a semicircular grass grid; the photovoltaic device array includes a plurality of anti-sand burial photovoltaic devices arranged in an array in a photovoltaic field area, and the one-way sand-blocking fence and the semicircular grass grid are both multiple, and are arranged in the upwind area of ​​the photovoltaic field area, and are perpendicular to the main wind direction; wherein the multiple one-way sand-blocking fences and the multiple semicircular grass grids are alternately arranged along the main wind direction, and blank strips are distributed between adjacent one-way sand-blocking fences and semicircular grass grids, thereby forming a strip-shaped wind and sand protection unit. The wind and sand protection system and protection method for desert areas provided by the present invention can effectively reduce the sand burial and wind erosion hazards encountered in photovoltaic construction in desert areas, and provide technical guarantees for the safe operation of photovoltaic power fields in such areas.

Description

Technical Field

[0001] The invention belongs to the field of ecological environment governance and photovoltaic sand control technology, and specifically relates to a sandstorm protection system and a protection method for desertified areas. Background Art

[0002] "Shagohuang" is a general term for deserts, Gobi and wastelands. It covers a vast area and is distributed in the northwest, north China and northeast China in an arc-shaped belt. This type of area has strong sunlight, strong wind, little precipitation, sparse vegetation, sparse population, flying sand and harsh climate. It is a region rich in wind and solar energy resources in my country. It has a large area of ​​unused land outside the ecological red line area, and the land space resources are rich. It is estimated that if 1% of my country's desertified area is used for new energy power generation, its installed capacity will exceed the current total installed capacity of power generation in my country. Many large photovoltaic bases in northwest my country are mostly built in the "Shagohuang" area, and most of them are suffering from serious wind and sand hazards. Therefore, when carrying out photovoltaic construction in these areas, whether it is the photovoltaic sand control measures themselves or the maintenance of the photovoltaic field, an important issue is the wind and sand protection after the construction of the field.

[0003] Different from the wind and sand protection in general areas, the construction of photovoltaic or photovoltaic sand control projects in desertified areas will face serious sand burial and wind erosion hazards (such as Figure 1 ), there are three main reasons. First, in desert areas, quicksand activities are frequent and the terrain is undulating. In Gobi desert areas, there are abundant sand sources, dry and windy, and quicksand has the characteristics of accumulation when encountering obstacles. Secondly, the photovoltaic array's own strong wind-blocking and sand-fixing effects will damage the original balanced and stable wind and sand flow field, and then cause sand accumulation on the underlying surface, raising the sand surface elevation, which will directly cause the risk of sand burial of the photovoltaic array, or cause wind erosion of the foundation piles, or even collapse. In addition, northwest winds generally prevail in desert areas, and under the premise that photovoltaic panels are set facing south, the air supply channel formed by the panels and the ground will inevitably intensify the transmission process of wind and sand into the field area. Therefore, it is very difficult to control the sand damage of photovoltaic power fields in desert areas. Finding effective control measures will provide guarantees for the normal operation of photovoltaic power fields in these areas, and improve the comprehensive utilization efficiency of various resources such as land and solar energy, which is of great practical significance for the development of my country's photovoltaic industry and the response to the energy crisis.

[0004] We have no specific countermeasures for the sand burial and wind erosion hazards in the Shagohuang photovoltaic array area. When burial or erosion occurs, temporary treatment such as sand removal or pile foundation reinforcement is often carried out by manual and mechanical means. The photovoltaic array changes the flow field and topography, and the changes in topography and flow field aggravate the sand burial or erosion of photovoltaic facilities. At present, we are still unclear about the long-term and complex mutual feedback process and its internal mechanism between the photovoltaic array and the wind and sand transmission, and we cannot fundamentally solve the long-term damage caused by sand accumulation to the photovoltaic array.

[0005] Based on the above-mentioned sand damage status and the shortcomings of the control methods, the photovoltaic base carried out systematic field flow field observations for photovoltaic modules in the in-situ utilization mode of sand dunes (such as Figure 2 ). The results show that the wind speed near the surface increases when the airflow passes under the photovoltaic panel array, especially at the front of the array, where the wind speed increases by 1.5 times (e.g. Figure 3 ). The airflow acceleration effect will enhance the wind and sand transmission on the surface, and move the quicksand entering the site from the periphery into the array, causing large-scale sand accumulation inside the array, threatening the safe operation of the photovoltaic field. According to field observations, when the lower edge height is low, obvious wind erosion often occurs, accompanied by a strong under-board sand transport process, causing the quicksand entering the site to continuously move into the array, thereby causing sand accumulation. Raising the ground clearance of the photovoltaic module so that the front edge of the photovoltaic panel is 2m above the ground surface can effectively slow down the acceleration of the airflow under the panel and the disturbance of the wind on the surface in the array area, reduce the quicksand entering the site from the periphery, and reduce its migration and deposition into the array, thereby suppressing the damage of sand accumulation to the photovoltaic array.

[0006] In view of the current status of sand burial hazards in the photovoltaic array area, technical deficiencies and field observation results, we found that after the flow field is disturbed, sand accumulates on the surface, causing the micro-topography to fluctuate (such as Figure 1 ), the height of the panel from the ground will also change over time. Therefore, a photovoltaic array bracket with adjustable height and inclination is needed to adjust the erosion intensity and wind and sand transmission intensity of the surface under the panel. The distribution position of the sand accumulation belt can also be changed by moving the bracket to prevent the sand from accumulating higher and higher in one place. Summary of the invention

[0007] The main purpose of the present invention is to provide a sandstorm protection system and a sandstorm protection method in desert areas to overcome the shortcomings of the prior art.

[0008] To achieve the purpose of the aforementioned invention, the technical solution adopted by the embodiment of the present invention includes:

[0009] The present invention provides a sandstorm protection system for desert areas, comprising a photovoltaic device array, a one-way sand barrier and a semicircular grass grid;

[0010] The photovoltaic device array includes a plurality of anti-sand burial photovoltaic devices arranged in an array in a photovoltaic field area, and the anti-sand burial photovoltaic device includes a mobile photovoltaic bracket and a photovoltaic panel arranged on the mobile photovoltaic bracket, and the mobile photovoltaic bracket is at least used to adjust the distance between the photovoltaic panel and the ground surface and the angle between the photovoltaic panel and the ground surface, so as to adjust the shape and / or size of the air supply channel formed between the photovoltaic panel and the ground surface, thereby increasing or reducing the intensity of the sweeping wind passing through the air supply channel; the one-way sand-blocking fence and the semicircular grass grid are both multi-channel and arranged in the The one-way sand-blocking fence is located in the upwind area of ​​the photovoltaic area and is perpendicular to the main wind direction. The one-way sand-blocking fence is used to block the quicksand migrating into the photovoltaic area and form sand accumulation in the gap inside the fence; and under the action of the reverse wind, the quicksand in the photovoltaic area is transported to the periphery; the semicircular grass grid is used to fix the mobile sand surface in the upwind direction of the periphery of the photovoltaic area, wherein a plurality of the one-way sand-blocking fences and a plurality of the semicircular grass grids are alternately arranged along the main wind direction, and blank strips are distributed between adjacent one-way sand-blocking fences and semicircular grass grids, thereby forming a strip-shaped wind and sand protection unit.

[0011] Furthermore, the backlight surface of the photovoltaic panel is arranged upwind of the light-receiving surface, and the photovoltaic panel is arranged at an angle, so as to cooperate with the ground to form the air supply channel.

[0012] Furthermore, the mobile photovoltaic support comprises a slide rail, a height-adjustable support and a plurality of foundation piles, the plurality of foundation piles are arranged in a straight line along the main wind direction, the slide rail is fixedly connected to the foundation piles, and the slide rails are arranged along the main wind direction;

[0013] The height-angle adjustable bracket includes a vertical bracket, an inclined bracket and an inclined keel, the inclined keel is oriented in the leeward direction, and the photovoltaic panel is arranged on the inclined keel; the inclined bracket is arranged between the vertical bracket and the inclined keel through a sliding connection, and the inclined bracket is oriented in the main wind direction; the bottom of the vertical bracket is connected to the slide rail through a sliding connection, the top of the vertical bracket is connected to the inclined keel through a rotatable fixed connection, and the vertical bracket is also transmission-connected to a vertical bracket lifting mechanism, so that the height of the vertical bracket can be adjusted under the drive of the vertical bracket lifting mechanism.

[0014] Furthermore, the vertical support comprises an outer tube and an inner tube, the inner tube is sleeved inside the outer tube, and an opening is provided on one side of the outer tube in the main wind direction, and a convex tooth is provided on one side of the inner tube in the main wind direction;

[0015] The vertical bracket lifting mechanism includes a gear, which is fixedly connected to the outer tube of the vertical bracket through a fixing assembly, and the gear is arranged on the side of the opening portion. A rocker for driving the gear to rotate is also provided on the gear. Under the drive of the rocker, the gear is engaged with the convex tooth to realize the up and down movement of the inner tube in the outer tube.

[0016] Furthermore, the one-way sand-blocking fence includes multiple channel side panels, guide plates and connecting rods, and both ends of the channel side panels and guide plates are tied and fixed on vertical poles inserted into the ground; multiple channel side panels are along the main wind direction and are arranged in multiple rows in parallel; between two adjacent channel side panels, multiple pairs of guide plates are arranged in pairs through the connecting rods, and each pair of guide plates is opposite to each other at an acute angle of 20-40 degrees, and maintains an opening of 30-50 cm at one end close to each other, and the narrow opening direction of each pair of guide plates is toward the outer upwind direction of the photovoltaic array, and the wide opening direction is toward the inner downwind direction of the photovoltaic array.

[0017] Furthermore, the semicircular grass grid includes a grass rope and a plurality of plant straw bundles, wherein the plurality of plant straw bundles are sequentially distributed along the length direction of the grass rope, wherein the plant straw bundle has a semicircular structure formed by wrapping a plurality of plant straws in the middle with the grass rope.

[0018] The present invention also provides a sandstorm protection method for a desert area, which is implemented based on the aforementioned sandstorm protection system for desert areas, and includes:

[0019] The photovoltaic device array is arranged in the photovoltaic field area, and the position of at least one anti-sand burial photovoltaic device in the photovoltaic device array and / or the distance and / or angle between the photovoltaic panel and the ground in at least one anti-sand burial photovoltaic device are adjusted to adjust the intensity of the sweeping wind passing through the air supply channel, thereby suppressing the damage of sand accumulation and wind erosion to the photovoltaic device array, wherein the air supply channel is formed between the photovoltaic panel and the ground surface;

[0020] A plurality of one-way sand-blocking fences and a plurality of semicircular grass grids are alternately arranged along the main wind direction in the upwind area of ​​the photovoltaic field, and the plurality of one-way sand-blocking fences and the plurality of semicircular grass grids are all perpendicular to the main wind direction, and blank strips are arranged between adjacent one-way sand-blocking fences and semicircular grass grids to form a strip-shaped wind and sand protection unit, thereby reducing the amount of sand entering the photovoltaic field.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The wind and sand protection system and method for desertified areas of the present invention utilizes a mobile photovoltaic support to adjust the height, angle, and position of the photovoltaic array inside the photovoltaic field, and then utilizes the photovoltaic panel itself to control the intensity of the sweeping wind, thereby effectively slowing down the airflow acceleration effect and wind and sand transmission intensity under the panel, and reducing the migration and deposition of peripheral quicksand into the photovoltaic field, thereby suppressing the damage of sand accumulation and wind erosion to the photovoltaic device array; secondly, in the upwind area outside the photovoltaic array field, a plurality of one-way sand-blocking fences and strip-shaped wind and sand protection units with semicircular grass grids at intervals are established, which prevents quicksand from being transmitted into the field while promoting quicksand to continuously migrate to the periphery of the field, thereby reducing the amount of sand entering the array area; in summary, the present invention can effectively reduce the sand burial and wind erosion hazards encountered in photovoltaic construction in desertified areas, and provide technical guarantee for the normal operation of photovoltaic fields in such areas.

[0023] (2) The anti-sand burial photovoltaic device provided in the present invention utilizes the narrow tube effect formed by the inclined structure of the photovoltaic panel itself and the surface, as well as the sweeping wind formed thereby, and integrates the functions of one-way sand blocking and one-way sand transport. The height, angle and position of the photovoltaic array on the windward slope can be adjusted, and then the intensity of the sweeping wind can be controlled by the photovoltaic panel itself, so as to effectively reduce the airflow acceleration effect under the panel, the intensity of wind and sand transmission, and the disturbance of the wind force on the surface of the photovoltaic field, reduce the quicksand entering the field from the periphery, and reduce the migration and deposition of the inside of the photovoltaic field, thereby inhibiting the harm of sand accumulation and wind erosion to the photovoltaic field. By moving the bracket, the distribution position of the sand accumulation belt can also be changed, so that the sand accumulation will not accumulate higher and higher in one place. There is no need for manual or mechanical sand cleaning, or the deployment of separate sand fixation measures, to achieve effective control of sand accumulation in the field. In addition, the bracket is strong and stable, and the components are connected to each other by connectors, which is convenient for disassembly, maintenance and reuse.

[0024] (3) The one-way sand-blocking fence provided in the present invention applies the Tesla one-way valve principle to the field of wind and sand control for the first time. It has the functional advantages of both one-sided sand blocking and one-sided sand transport, and is resistant to sand burial. It does not need to rely on controlling any active components to achieve an open or closed state. It is a one-way valve structure that does not contain any active components and does not have any moving parts. Therefore, it does not require any maintenance and has the advantages of cost savings and a long service life. In addition, the one-way sand-blocking fence is liftable. When quicksand accumulates in the fence, the fence can be lifted without affecting the function of the one-way valve.

[0025] (4) The semicircular grass grid provided in the present invention simulates the radial branching structure of the above-ground straw of the traditional grass grid, which can sway with the wind to reduce wind energy. There is no need to bury straw underground. It has the advantages of large wind-blocking surface, high sand-fixing efficiency, straw saving, convenient construction, natural degradation, and promotion of crusting and native vegetation growth. It makes up for the shortcomings of the brush-like grass grid that is easy to roll and the bottom is easy to pass sand. The addition of branches with leaves improves the wind-blocking and sand-fixing efficiency of the grass grid and makes the structure more stable. This technology also overcomes the problem of the traditional grass grid's straw lodging that reduces the sand-fixing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is the sand burial and wind erosion damage status of photovoltaic components in photovoltaic bases.

[0028] Figure 2 This is a schematic diagram of the flow field observation of photovoltaic modules under the in-situ utilization mode of sand dunes in the photovoltaic base.

[0029] Figure 3 yes Figure 2 Variation of average wind speed at different observation points at 0.4m and 1.0m above the ground surface during the observation period.

[0030] Figure 4 It is a structural schematic diagram of a sandstorm protection system in a Shagohuang area in one embodiment of the present application.

[0031] Figure 5 yes Figure 4 Schematic diagram of the structure of the medium-defense sand-buried photovoltaic device.

[0032] Figure 6 yes Figure 5 Schematic diagram of the C-shaped square steel structure of the middle slide rail.

[0033] Figure 7 yes Figure 5 Schematic diagram of the structure of the vertical support lifting mechanism.

[0034] Figure 8 yes Figure 5 Schematic diagram of the structure of the sliding connection.

[0035] Fig. 9 yes Figure 4 Schematic diagram of the structure of the one-way sand barrier.

[0036] Fig.10 yes Figure 4 Schematic diagram of the cross section of a medium semicircular grass grid.

[0037] Explanation of reference numerals: 1. Anti-sand burial photovoltaic device, 11. Slide rail, 12. Vertical bracket, 121. Outer tube, 122. Inner tube, 13. Inclined keel, 14. Inclined bracket, 15. Rotatable fixed connector, 16. Sliding connector, 161. Casing connecting section, 162. Rotating connecting section, 163. Fixed plate, 164. Screw, 17. Vertical bracket lifting mechanism, 171. Gear, 172. Fixed plate, 173. Rocker, 174. Tightening fixed plate, 18. Galvanized steel pipe connecting section, 19. Foundation pile, 2. One-way sand-blocking fence, 21. Channel side panel, 22. Guide plate, 23. Connecting rod, 24. Vertical pole, 3. Semicircular grass grid, 31. Straw such as wheat straw and reed, 32. Straw rope, 33. Branches with leaves, 4. Main wind direction. DETAILED DESCRIPTION

[0038] The present invention will be more fully understood through the following detailed description, which should be read in conjunction with the accompanying drawings. Detailed embodiments of the present invention are disclosed herein; however, it should be understood that the disclosed embodiments are only exemplary of the present invention, which can be embodied in various forms. Therefore, the specific functional details disclosed herein should not be interpreted as limiting, but only as the basis of the claims and as a representative basis for teaching those skilled in the art to adopt the present invention in different ways in virtually any appropriate detailed embodiment.

[0039] In view of the shortcomings of the prior art, the inventor of this case, after long-term research and practice, proposed a wind and sand protection system and method for desertified areas. Inside the photovoltaic field, a mobile photovoltaic bracket is used to adjust the height, angle, and position of the photovoltaic array, and then the photovoltaic panel is used to control the intensity of the sweeping wind, effectively slowing down the airflow acceleration effect and wind and sand transmission intensity under the panel, reducing the migration and deposition of peripheral quicksand to the inside of the photovoltaic field, thereby inhibiting the damage of sand accumulation and wind erosion to the photovoltaic device array; secondly, in the upwind area outside the photovoltaic field, a plurality of one-way sand-blocking fences and strip-shaped wind and sand protection units with semicircular grass grids are established to prevent quicksand from being transmitted to the inside of the field, while promoting quicksand to continuously migrate to the periphery of the field, reducing the amount of sand coming to the array area. The technical solution of the present invention will be explained in more detail as follows.

[0040] One aspect of an embodiment of the present invention provides a sandstorm protection system for desert areas, including a photovoltaic device array, a one-way sand barrier fence, and a semicircular grass grid;

[0041] The photovoltaic device array includes a plurality of anti-sand burial photovoltaic devices arranged in an array in a photovoltaic field area, and the anti-sand burial photovoltaic device includes a mobile photovoltaic bracket and a photovoltaic panel arranged on the mobile photovoltaic bracket, and the mobile photovoltaic bracket is at least used to adjust the distance between the photovoltaic panel and the ground surface and the angle between the photovoltaic panel and the ground surface, so as to adjust the shape and / or size of the air supply channel formed between the photovoltaic panel and the ground surface, thereby increasing or reducing the intensity of the sweeping wind passing through the air supply channel; the one-way sand-blocking fence and the semicircular grass grid are both multi-channel and arranged in the The one-way sand-blocking fence is located in the upwind area of ​​the photovoltaic area and is perpendicular to the main wind direction. The one-way sand-blocking fence is used to block the quicksand migrating into the photovoltaic area and form sand accumulation in the gap inside the fence; and under the action of the reverse wind, the quicksand in the photovoltaic area is transported to the periphery; the semicircular grass grid is used to fix the mobile sand surface in the upwind direction of the periphery of the photovoltaic area, wherein a plurality of the one-way sand-blocking fences and a plurality of the semicircular grass grids are alternately arranged along the main wind direction, and blank strips are distributed between adjacent one-way sand-blocking fences and semicircular grass grids, thereby forming a strip-shaped wind and sand protection unit.

[0042] In some preferred embodiments, the backlight surface of the photovoltaic panel is arranged upwind of the light-receiving surface, and the photovoltaic panel is arranged at an angle to form the air supply channel in cooperation with the ground.

[0043] In some preferred embodiments, the mobile photovoltaic support comprises a slide rail, a height-adjustable support and a plurality of foundation piles, the plurality of foundation piles are arranged in a straight line along the main wind direction, the slide rail is fixedly connected to the foundation piles, and the slide rails are arranged along the main wind direction;

[0044] The height-angle adjustable bracket includes a vertical bracket, an inclined bracket and an inclined keel, the inclined keel is oriented in the leeward direction, and the photovoltaic panel is arranged on the inclined keel; the inclined bracket is arranged between the vertical bracket and the inclined keel through a sliding connection, and the inclined bracket is oriented in the main wind direction; the bottom of the vertical bracket is connected to the slide rail through a sliding connection, the top of the vertical bracket is connected to the inclined keel through a rotatable fixed connection, and the vertical bracket is also transmission-connected to a vertical bracket lifting mechanism, so that the height of the vertical bracket can be adjusted under the drive of the vertical bracket lifting mechanism.

[0045] In some preferred embodiments, the vertical support comprises an outer tube and an inner tube, the inner tube is sleeved inside the outer tube, and the outer tube is provided with an opening on one side in the main wind direction, and the inner tube is provided with a convex tooth on one side in the main wind direction;

[0046] The vertical bracket lifting mechanism includes a gear, which is fixedly connected to the outer tube of the vertical bracket through a fixing assembly, and the gear is arranged on the side of the opening portion. A rocker for driving the gear to rotate is also provided on the gear. Under the drive of the rocker, the gear is engaged with the convex tooth to realize the up and down movement of the inner tube in the outer tube.

[0047] In some preferred embodiments, the spacing between two adjacent rows of anti-sand burial photovoltaic devices in the photovoltaic field is 6-10 m, and the spacing between two adjacent anti-sand burial photovoltaic devices in each row of anti-sand burial photovoltaic devices is 2-4 m.

[0048] In some preferred embodiments, the spacing between the foundation piles is 2-4m, the buried depth of the foundation piles is 1.5-3m, and the height above the surface is 0.3-1m. In some preferred embodiments, the foundation piles include cylindrical cement piles with a diameter of 15-30cm, and the top of the cylindrical cement column is pre-buried with a galvanized steel pipe connection section with a diameter of 10cm; or, the foundation piles include galvanized steel pipe spiral piles with a diameter of 10cm.

[0049] In some preferred embodiments, the slide rail comprises a C-shaped square steel with an opening facing upward, a cross-sectional width of 10-15 cm, a height of 4-10 cm, and a length of 4-7 m, which is basically equal to the spacing between two adjacent rows of anti-sand burial photovoltaic devices (6-10 m) minus the width of the maintenance channel (2-3 m).

[0050] In some preferred embodiments, the outer tube and the inner tube of the vertical support include galvanized square steel, with a cross-sectional width of 10-15 cm and a height of 4-10 cm;

[0051] In some preferred embodiments, the tilting bracket comprises galvanized square steel with a cross-sectional width of 10-15 cm and a height of 4-10 cm.

[0052] In some preferred embodiments, the inclined keel comprises a C-shaped square steel with an opening facing downward, a cross-sectional width of 10-15 cm, and a height of 4-10 cm.

[0053] In some preferred embodiments, the inner tube of the vertical support is 2-4 mm thinner than the outer tube.

[0054] The anti-sand burial photovoltaic device provided by the embodiment of the present invention utilizes the narrow tube effect formed by the inclined structure of the photovoltaic panel itself and the surface, and the cleaning wind formed thereby, and integrates the one-way sand blocking and one-way sand transport functions; the position, height, angle and position of the photovoltaic array on the windward slope can be adjusted, and then the photovoltaic panel can be used to control the intensity of the cleaning wind, effectively reducing the airflow acceleration effect under the panel, the wind and sand transmission intensity, and the disturbance of the wind force on the surface in the array area, reducing the quicksand entering the site from the periphery, and the migration and deposition to the inside of the array, thereby inhibiting the damage of sand accumulation and wind erosion to the photovoltaic device array; by moving the bracket, the distribution position of the sand accumulation belt can also be changed, so that the sand accumulation will not accumulate higher and higher in one position; there is no need for manual or mechanical sand cleaning, or the deployment of separate sand fixation measures, to achieve effective control of sand accumulation in the site; in addition, the bracket is high in strength, stable and reliable, and the components are connected to each other by connectors, which is convenient for disassembly, maintenance and reuse.

[0055] In some preferred embodiments, the one-way sand-blocking fence includes a plurality of channel side panels, guide plates and connecting rods, and both ends of the channel side panels and guide plates are tied and fixed on vertical poles inserted into the ground; a plurality of channel side panels are arranged along the main wind direction and in multiple rows in parallel; between two adjacent channel side panels, a plurality of pairs of guide plates are arranged in pairs through the connecting rods, and each pair of guide plates are opposite to each other at an acute angle of 20-40 degrees, and maintain an opening of 30-50 cm at one end close to each other, and the narrow opening direction of each pair of guide plates is toward the outer upwind direction of the photovoltaic array, and the wide opening direction is toward the inner downwind direction of the photovoltaic array.

[0056] In some preferred embodiments, the channel side plates and guide plates are rectangular frame structures welded from round steel, and a HDPE mesh with a porosity of 30-45% is bound and fixed thereon.

[0057] In some preferred embodiments, the four corners of each guide plate and the channel side plates are welded and fixed to each other using connecting rods.

[0058] In some preferred embodiments, the one-way sand barrier is arranged in the upwind area of ​​the outer periphery of the photovoltaic field, and is within a range of 50-300m from the edge of the photovoltaic field. In some preferred embodiments, the width of the channel side plate along the main wind direction is 3-6m, the height is 1-1.5m, and the spacing between two adjacent channel side plates is 1.5-2.5m.

[0059] In some preferred embodiments, the guide plate has a length of 1-2 m and a height of 1-1.5 m.

[0060] In some preferred embodiments, the connecting rod is a round steel with a diameter of 2-4 cm, and the two ends of the connecting rod are welded and fixed to the four corners of the channel side plates and the guide plates, so as to fix multiple channel side plates and the guide plates therebetween to form an integral structure.

[0061] In some preferred embodiments, the vertical pole is a round steel with a diameter of 3-4 cm, which is inserted into the ground, wherein the underground burial depth is 50-100 cm and the above-ground leakage height is 2.0-2.5 m.

[0062] In some preferred embodiments, multiple vertical poles are bundled with the sides of the channel side plates and the guide plates to fix the channel side plates and the guide plates; when the channel side plates and the guide plates are seriously buried in sand, the bundles between the vertical poles and the channel side plates and the guide plates can be untied, and the channel side plates and the guide plates can be lifted to achieve the purpose of long-term use.

[0063] The one-way sand-blocking fence provided by the embodiment of the present invention applies the Tesla one-way valve principle to the field of wind and sand prevention for the first time. It has the functional advantages of both one-sided sand blocking and one-sided sand transport, and is resistant to sand burial. It allows fluid to flow in one direction, and there is huge resistance in the opposite direction. With its unique structure and natural wind force, it can prevent quicksand from being transported to the inside of the site for a long time, and can also allow quicksand to be continuously transported to the periphery of the site. Even if a certain height of accumulated sand has formed inside the fence, it will not affect the blocking and acceleration effects of the fence on the airflow under the action of two opposite wind forces. There is no need to rely on controlling any active components to achieve the opening and closing state. It is a one-way valve structure without active components and has no active parts. Therefore, it does not require any maintenance and has the advantages of cost saving and long engineering service life. In addition, the one-way sand-blocking fence is liftable. When quicksand accumulates in the fence, the fence can be lifted without affecting the function of the one-way valve.

[0064] In some preferred embodiments, the semicircular grass grid includes a straw rope and a plurality of plant straw bundles, wherein the plurality of plant straw bundles are sequentially distributed along the length direction of the straw rope, wherein the plant straw bundle has a semicircular structure formed by wrapping a plurality of plant straws in the middle with the straw rope.

[0065] In some preferred embodiments, the semicircular grass grids are arranged in a size of 1m×1m or 1.5m×1.5m.

[0066] In some preferred embodiments, the plant straw bundle is fixed on the flowing sand surface in the upwind direction at the periphery of the photovoltaic array area via branches with leaves, and the semicircular surface of the plant straw bundle is arranged perpendicular to the sand surface.

[0067] The semicircular grass grid provided in the embodiment of the present invention simulates the radial branching structure of the above-ground straw of the traditional grass grid, can sway with the wind to reduce wind energy, and does not need to bury straw underground. It has the advantages of large wind-blocking surface, high sand-fixing efficiency, straw saving, convenient construction, natural degradation, promotion of crusting and native vegetation growth, etc., and makes up for the shortcomings of the brush-like grass grid that is easy to roll and easy to pass sand at the bottom. The addition of branches with leaves improves the wind-blocking and sand-fixing efficiency of the grass grid and makes the structure more stable. The technology also overcomes the problem of the traditional grass grid's straw lodging reducing the sand-fixing efficiency.

[0068] Another aspect of the embodiments of the present invention provides a sandstorm protection method for a desert area. The protection method is implemented based on the aforementioned sandstorm protection system for a desert area, and the protection method includes:

[0069] The photovoltaic device array is arranged in the photovoltaic field area, and the position of at least one anti-sand burial photovoltaic device in the photovoltaic device array and / or the distance and / or angle between the photovoltaic panel and the ground in at least one anti-sand burial photovoltaic device are adjusted to adjust the intensity of the sweeping wind passing through the air supply channel, thereby suppressing the damage of sand accumulation and wind erosion to the photovoltaic device array, wherein the air supply channel is formed between the photovoltaic panel and the ground surface;

[0070] A plurality of one-way sand-blocking fences and a plurality of semicircular grass grids are alternately arranged along the main wind direction in the upwind area of ​​the photovoltaic field, and the plurality of one-way sand-blocking fences and the plurality of semicircular grass grids are all perpendicular to the main wind direction, and blank strips are arranged between adjacent one-way sand-blocking fences and semicircular grass grids to form a strip-shaped wind and sand protection unit, thereby reducing the amount of sand entering the photovoltaic field.

[0071] In some preferred embodiments, the wind and sand protection method in desert areas specifically includes: in the vertical direction, by adjusting the height of the vertical bracket, the height of the lowest end of the inclined keel from the ground can be continuously adjusted between 0.5m-3m, and the angle between the inclined keel and the ground can be continuously adjusted between 35-50 degrees.

[0072] In some preferred embodiments, the method for protecting desert areas from wind and sand specifically includes: when serious sand accumulation occurs, the height-adjustable bracket on the slide rail is moved upward in the wind direction to change the position of the photovoltaic panel.

[0073] Among them, in the above-mentioned anti-sand burying photovoltaic device layout method, since the photovoltaic panels in the photovoltaic device array face south and the back of the photovoltaic panels face north, that is, upwind, or the direction of the wind, the sand source first invades the edge area of ​​the photovoltaic device array upwind, and the sand accumulation hazard first begins in this area. In fact, once the edge area on the north side of the array begins to accumulate sand, unless removal operations are taken, the large-area photovoltaic device array itself has a strong sand blocking and sand fixing effect, which will cause the sand accumulation to continue to develop.

[0074] During this process, when obvious sand accumulation appears in the upwind edge area of ​​the photovoltaic array area, based on field observation results, it is necessary to increase the height of the lower edge of the photovoltaic panel in this area to about 2m, and adjust the angle of the photovoltaic panel to 30-35 degrees, so as to suppress the airflow acceleration effect under the panel, slow down the disturbance of the wind on the ground surface, and reduce the speed of sand migration into the array, thereby alleviating the harm of wind-blown sand inside the array.

[0075] The specific method for adjusting the height and angle is to manually turn the winch to adjust the height of the vertical brackets on both sides. When the lower edge of the board reaches a predetermined height and the board reaches a predetermined angle, tighten the fixing plate on the vertical bracket lifting mechanism and the movable connecting bolts at both ends of the inclined bracket at the same time to complete the adjustment of the board height and angle.

[0076] If the sand accumulation continues to develop towards the inside of the array, when serious sand accumulation occurs, the liftable and angle-adjustable bracket on the slide rail can be moved upwind (to the north) to change the position of the photovoltaic panel, and then change the development position of the sand accumulation belt, so that the sand accumulation continues to develop on the north side of the original sand accumulation belt, so that the sand accumulation belt will not develop too high at a fixed position and bury the lower edge of the photovoltaic panel.

[0077] During the specific implementation process, in the upwind area outside the photovoltaic array area, perpendicular to the main wind direction, a multi-strip plus blank strip layout mode is applied to establish a strip-shaped wind and sand protection unit with 2-4 one-way sand-blocking fences and semicircular grass grids spaced apart, and a 5-10m blank strip is reserved between the multiple one-way sand-blocking fences and the semicircular grass grids; among them, the one-way sand-blocking fence is set with a width of 3-6m, and the semicircular grass grid is set with a width of 20-50m.

[0078] The one-way sand-blocking fence has both sand-blocking and sand-transporting functions, which can block the quicksand migrating into the array area and form sand accumulation in the gaps inside the fence. When there is reverse wind, the airflow acceleration effect of the one-way sand-blocking fence will increase the sand transport intensity, causing the quicksand in the array area to be transported to the periphery. Semicircular grass grids are used in combination with plant measures to fix the quicksand belts between multiple one-way sand-blocking fences, and a combination of blocking and consolidation measures are used on the periphery to reduce the amount of sand entering the photovoltaic array area.

[0079] The following will describe the technical solutions in the embodiments of the present invention in detail in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0080] Example 1

[0081] This embodiment provides a sandstorm protection system for desert areas. Figure 4 As shown, it includes a photovoltaic device array, a one-way sand-blocking fence 2 and a semicircular grass grid 3.

[0082] The photovoltaic device array includes a plurality of anti-sand burial photovoltaic devices 1 arranged in an array in a photovoltaic field area, the anti-sand burial photovoltaic device 1 includes a mobile photovoltaic support and a photovoltaic panel arranged on the mobile photovoltaic support, the mobile photovoltaic support is at least used to adjust the distance between the photovoltaic panel and the ground surface and the angle between the photovoltaic panel and the ground surface, so as to adjust the shape and / or size of the air supply channel formed between the photovoltaic panel and the ground surface, thereby increasing or reducing the intensity of the sweeping wind passing through the air supply channel;

[0083] Both the one-way sand-blocking fence 2 and the semicircular grass grid 3 are multiple and are arranged in the upwind area of ​​the photovoltaic field area and are perpendicular to the main wind direction. The one-way sand-blocking fence 2 is used to block the quicksand migrating into the photovoltaic field area and form sand accumulation in the gap inside the fence; and under the action of the reverse wind, the quicksand in the photovoltaic field area is transported to the periphery; the semicircular grass grid 3 is used to fix the flowing sand surface in the upwind direction of the photovoltaic field periphery, wherein the multiple one-way sand-blocking fences 2 and the multiple semicircular grass grids 3 are alternately arranged along the main wind direction, and a blank strip of 5-10m is distributed between adjacent one-way sand-blocking fences 2 and semicircular grass grids 3, thereby forming a strip-shaped wind and sand protection unit.

[0084] Specifically, the sandstorm protection system in the desert area of ​​this embodiment is deployed by the following method:

[0085] In the Shagohuang area, a plurality of anti-sand burial photovoltaic devices 1 are arranged to form a photovoltaic device array in the photovoltaic field area;

[0086] In the upwind area outside the photovoltaic array area, perpendicular to the main wind direction 4, a multi-strip plus blank strip layout mode is applied to establish a belt-shaped sand protection system with 2-4 one-way sand-blocking fences 2 and semicircular grass grids 3 spaced apart, and a 5-10m blank strip is reserved between the multiple one-way sand-blocking fences 2 and the semicircular grass grids 4;

[0087] Among them, the spacing between two adjacent rows of anti-sand burial photovoltaic devices 1 in the photovoltaic device array is 6-10m, and the spacing between two adjacent anti-sand burial photovoltaic devices 1 in each row is 2-4m, the setting width of the one-way sand-blocking fence 2 is 3-6m, and the setting width of the semicircular grass grid 3 is 20-50m.

[0088] In this embodiment, the specific structure of the anti-sand burial photovoltaic device 1 is as follows: Figure 5As shown, it includes a mobile photovoltaic support and a photovoltaic panel arranged on the mobile photovoltaic support, and the mobile photovoltaic support is at least used to adjust the distance between the photovoltaic panel and the ground surface and the angle between the photovoltaic panel and the ground surface, so as to adjust the shape and / or size of the air supply channel formed between the photovoltaic panel and the ground surface, thereby increasing or weakening the intensity of the cleaning wind passing through the air supply channel; specifically, the mobile photovoltaic support includes a slide rail 11, a height-adjustable support and a plurality of foundation piles 19, and the foundation piles 19 are cylindrical cement piles with a diameter of 20 cm, and the top is pre-buried The galvanized steel pipe connecting section 18 with a diameter of 10 cm is buried at a depth of 1.5-3m and at a height of 0.3-1m above the surface. In specific implementation, each row of foundation piles 19 is arranged along the main wind direction, 3-5 piles are arranged in a straight line, and the spacing is 2-4m. The specific number of piles 19 arranged in each row is determined according to the spacing between two adjacent rows of anti-sand buried photovoltaic devices 1. In the direction perpendicular to the main wind direction, the spacing between each row of foundation piles 19 is 2-4m, and the specific number of rows is determined according to the length of each row of anti-sand buried photovoltaic devices 1. The slide rail 11 adopts the following method: Figure 6 The C-shaped square steel with the opening facing upward has a cross-sectional width of 10 cm and a height of 4 cm, and is fixedly connected to the galvanized steel pipe connecting section 18 with a diameter of 10 cm pre-buried on the top of the foundation pile 19, so that the slide rails 11 are all arranged along the main wind direction 4. The length of the slide rails 11 is 4-7m, which is basically equal to the distance between two adjacent rows of anti-sand burial photovoltaic devices 1 (6-10m) minus the width of the maintenance channel (2-3m).

[0089] Among them, the height-adjustable bracket includes a vertical bracket 12, an inclined bracket 14 and an inclined keel 13, the inclined keel 13 is oriented in the leeward direction, and the photovoltaic panel (not shown in the figure) is arranged on the inclined keel 13; the inclined bracket 14 is arranged between the vertical bracket 12 and the inclined keel 13 through a sliding connection 16, and the direction of the inclined bracket 14 is the main wind direction 4; the bottom of the vertical bracket 12 is connected to the slide rail 11 through the sliding connection 16, the top of the vertical bracket 12 is connected to the inclined keel 13 through a rotatable fixed connection 15, and the vertical bracket 12 is also connected to the vertical bracket lifting mechanism 17 in a transmission connection, so that the vertical bracket 12 can adjust the height under the drive of the vertical bracket lifting mechanism 17.

[0090] In this embodiment, if Figure 7As shown, the vertical bracket 12 includes an outer tube 121 and an inner tube 122, the inner tube 122 is sleeved inside the outer tube 121, the inner tube 122 is 2-4 mm thinner than the outer tube 121, and the outer tube 121 is provided with an opening on one side of the main wind direction 4, and the inner tube 122 is provided with a convex tooth on one side of the main wind direction 4; the vertical bracket lifting mechanism 17 includes a gear 171, the gear 171 is fixedly connected to the outer tube 121 of the vertical bracket 12 through a fixing plate 172, and the end of the fixing plate 172 connected to the outer tube 121 is also fixed by a tightening fixing plate 174, and the gear 171 is arranged on the side of the opening, and the gear 171 is also provided with a rocker 173 for driving the gear 171 to rotate, and the gear 171 is meshed with the convex tooth under the drive of the rocker 173, so that the inner tube 122 can move up and down in the outer tube 121, thereby realizing the height and angle adjustment of the photovoltaic panel.

[0091] In the specific implementation process, the inclined bracket 14 is made of galvanized square steel with a cross-sectional width of 10 cm and a height of 4 cm. The inclined keel 13 is made of C-shaped square steel with an opening facing downward, a cross-sectional width of 10 cm and a height of 4 cm. In this embodiment, the sliding connector 16 can be made of Figure 8 The structure shown includes a sleeve connecting section 161 and a rotating connecting section 162. The rotating connecting section 162 is fixedly connected to the slope slide rail 11 or the vertical bracket 12 or the inclined keel 13 through a fixing plate 163, and the sleeve connecting section 161 is locked with the vertical bracket 12 or the inclined bracket 14 through a screw 164.

[0092] In this embodiment, the one-way sand-blocking fence 2 is at least used to block the quicksand moving into the photovoltaic device array area and form sand accumulation in the gap inside the fence; and under the action of reverse wind, the quicksand in the photovoltaic device array area is transported to the periphery; the one-way sand-blocking fence 2 is arranged in the upwind area of ​​the outer periphery of the photovoltaic field area and is within the range of 50-300m from the edge of the photovoltaic field area, and the specific structure of the one-way sand-blocking fence 2 is as follows: Fig. 9 As shown, it includes multiple channel side panels 21, guide plates 22 and connecting rods 23, and both ends of the channel side panels 21 and the guide plates 22 are tied and fixed on the vertical poles 24 inserted into the ground; multiple channel side panels 21 are arranged in parallel in multiple rows along the main wind direction 4; between two adjacent channel side panels 21, 2-4 pairs of guide plates 22 are arranged in pairs through connecting rods 23, each pair of guide plates 22 is opposite to each other at an acute angle of 20-40 degrees, and an opening of 30-50 cm is maintained at one end close to each other, and the narrow opening direction of each pair of guide plates 22 faces the outer upwind direction of the photovoltaic device array, and the wide opening direction faces the inner downwind direction of the photovoltaic device array; the channel side panels 21 and the guide plates 22 are both rectangular frame structures welded from round steel, on which a HDPE mesh with a porosity of 30-45% is tied and fixed, and the four corners of each guide plate 22 and the channel side panel 21 are welded and fixed to each other using connecting rods 23.

[0093] In the specific implementation process, the width of the channel side plate 21 along the main wind direction 4 is 3-6m, the height is 1-1.5m, and the spacing between two adjacent channel side plates 21 is 1.5-2.5m; the length of the guide plate 22 is 1-2m, the height is 1-1.5m, the connecting rod 23 is a round steel with a diameter of 2-4cm, and the two ends of the connecting rod 23 are respectively welded and fixed to the four corners of the channel side plate 21 and the guide plate 22, so as to fix and connect multiple channel side plates 21 and the guide plates 22 therebetween to form an integral structure. The vertical poles 24 are round steel with a diameter of 3-4 cm and are inserted into the ground. The underground burial depth is 50-100 cm and the above-ground leakage height is 2.0-2.5 m. Multiple vertical poles 24 are tied to the sides of the channel side plates 21 and the guide plates 22 to fix the channel side plates 21 and the guide plates 22. When the channel side plates 21 and the guide plates 22 are seriously buried in sand, the binding between the vertical poles 24 and the channel side plates 21 and the guide plates 22 can be untied, and the channel side plates 21 and the guide plates 22 can be lifted to achieve the purpose of long-term use.

[0094] In this embodiment, the semicircular grass grid 3 is used at least to fix the flowing sand surface in the upwind direction of the outer periphery of the photovoltaic device array area, such as Fig.10 As shown, it includes a straw bundle with a semicircular cross-section and a branch 23 with leaves. Specifically, wheat straw, reed and other straws 21 are placed in rows, and straw ropes 22 and a straw weaving machine are used to wrap the straws in the middle to form a straw bundle with a semicircular cross-section. The semicircular bundle is laid flat so that the straws in the bundle face upward, and branches 23 with leaves are inserted into the straw ropes 22 at intervals of 20-30 cm, and fixed on the surface of the flowing sand to form a grid structure with a side length of 1 meter or 1.5 meters.

[0095] Example 2

[0096] This embodiment provides a sandstorm protection method for a desert area. The protection method is implemented based on the sandstorm protection system for desert areas in Embodiment 1, and the protection method includes:

[0097] The photovoltaic device array is set in the photovoltaic field area, and the position of at least one anti-sand burial photovoltaic device 1 in the photovoltaic device array and / or the distance and / or angle between the photovoltaic panel and the ground in at least one anti-sand burial photovoltaic device 1 are adjusted to adjust the intensity of the sweeping wind passing through the air supply channel, thereby suppressing the damage of sand accumulation and wind erosion to the photovoltaic device array, wherein the air supply channel is formed between the photovoltaic panel and the ground surface. Specifically, in the vertical direction, by adjusting the height of the vertical bracket 12, the height of the lowest end of the inclined keel 13 from the ground can be continuously adjusted between 0.5m and 3m, and the angle between the inclined keel 13 and the ground can be continuously adjusted between 35 and 50 degrees; when serious sand accumulation occurs, the height-adjustable bracket on the slide rail 11 is moved upward in the wind direction to change the position of the photovoltaic panel;

[0098] A plurality of one-way sand-blocking fences 2 and a plurality of semicircular grass grids 3 are alternately arranged along the main wind direction in the upwind area of ​​the photovoltaic field, and the plurality of one-way sand-blocking fences 2 and the plurality of semicircular grass grids 3 are all perpendicular to the main wind direction 4, and blank strips are arranged between adjacent one-way sand-blocking fences 2 and semicircular grass grids 3 to form a strip-shaped wind and sand protection unit, thereby reducing the amount of sand entering the photovoltaic field.

[0099] In addition, the inventors of this case also referred to the aforementioned embodiments and conducted experiments with other raw materials, process operations, and process conditions described in this specification, and obtained relatively ideal results.

[0100] Although the present invention has been described with reference to illustrative embodiments, it will be appreciated by those skilled in the art that various other changes, omissions and / or additions may be made without departing from the spirit and scope of the present invention and that the elements of the embodiments may be replaced by substantial equivalents. In addition, many modifications may be made without departing from the scope of the present invention to adapt specific circumstances or materials to the teachings of the present invention. Therefore, it is not intended herein to limit the present invention to the disclosed specific embodiments for performing the present invention, but it is intended that the present invention will include all embodiments within the scope of the appended claims. In addition, unless specifically stated, any use of the terms first, second, etc. does not indicate any order or importance, but rather uses the terms first, second, etc. to distinguish one element from another.

Claims

1. A sandstorm protection system for desert areas, characterized in that: It comprises a photovoltaic device array, a plurality of one-way sand-blocking fences and a plurality of semicircular grass grids; the photovoltaic device array comprises a plurality of anti-sand-buried photovoltaic devices arranged in an array in a photovoltaic field, wherein the spacing between two adjacent rows of anti-sand-buried photovoltaic devices is 6-10m, and the spacing between two adjacent anti-sand-buried photovoltaic devices in each row of anti-sand-buried photovoltaic devices is 2-4m; the one-way sand-blocking fences and the semicircular grass grids are both multiple, and are alternately arranged in the upwind area of ​​the photovoltaic field along the main wind direction, and are perpendicular to the main wind direction, and blank strips are distributed between adjacent one-way sand-blocking fences and semicircular grass grids, thereby forming a strip-shaped wind and sand protection unit, the one-way sand-blocking fence has a width of 3-6m, the semicircular grass grid has a width of 20-50m, and the blank strip has a width of 5-10m; The anti-sand burial photovoltaic device comprises a mobile photovoltaic support and a photovoltaic panel arranged on the mobile photovoltaic support, the backlight surface of the photovoltaic panel is arranged upwind of the light-receiving surface, and the photovoltaic panel is arranged obliquely and cooperates with the ground to form an air supply channel, and the mobile photovoltaic support is at least used to adjust the distance between the photovoltaic panel and the ground surface and the angle between the photovoltaic panel and the ground, so as to adjust the shape and / or size of the air supply channel, thereby increasing or reducing the intensity of the sweeping wind passing through the air supply channel; The one-way sand-blocking fence is used to block the quicksand moving into the photovoltaic field area, and to form sand accumulation in the gap inside the fence, and to transport the quicksand in the photovoltaic field area to the periphery under the action of reverse wind, and the one-way sand-blocking fence includes multiple channel side panels, guide plates and connecting rods, and both ends of the channel side panels and guide plates are tied and fixed on the vertical poles inserted in the ground; multiple channel side panels are arranged in parallel in multiple rows along the main wind direction; between two adjacent channel side panels, multiple pairs of guide plates are arranged in pairs through the connecting rods, each pair of guide plates is opposite to each other at an acute angle of 20-40 degrees, and maintains an opening of 30-50 cm at one end close to each other, and the narrow opening direction of each pair of guide plates is toward the upwind direction of the periphery of the photovoltaic array, and the wide opening direction is toward the downwind direction of the interior of the photovoltaic array; The semicircular grass grid is used to fix the flowing sand surface on the upwind side of the photovoltaic field area, and includes a grass rope and a plurality of plant straw bundles, wherein the plurality of plant straw bundles are distributed in sequence along the length direction of the grass rope, wherein the plant straw bundle has a semicircular structure formed by wrapping a plurality of plant straws in the middle with the grass rope, and the plant straw bundle is fixed on the flowing sand surface on the upwind side of the photovoltaic array area via branches with leaves, and the semicircular surface of the plant straw bundle is arranged perpendicular to the sand surface.

2. The sandstorm protection system for desert areas according to claim 1 is characterized by: The mobile photovoltaic support comprises a slide rail, a height-adjustable support and a plurality of foundation piles, wherein the plurality of foundation piles are arranged in a straight line along the main wind direction, and the slide rail is fixedly connected to the foundation piles so that the slide rails are arranged along the main wind direction; The height-angle adjustable bracket includes a vertical bracket, an inclined bracket and an inclined keel, the inclined keel is oriented in the leeward direction, and the photovoltaic panel is arranged on the inclined keel; the inclined bracket is arranged between the vertical bracket and the inclined keel through a sliding connection, and the inclined bracket is oriented in the main wind direction; the bottom of the vertical bracket is connected to the slide rail through a sliding connection, the top of the vertical bracket is connected to the inclined keel through a rotatable fixed connection, and the vertical bracket is also transmission-connected to a vertical bracket lifting mechanism, so that the height of the vertical bracket can be adjusted under the drive of the vertical bracket lifting mechanism.

3. The sandstorm protection system for desert areas according to claim 2 is characterized by: The vertical support comprises an outer tube and an inner tube, the inner tube is sleeved inside the outer tube, and an opening is provided on one side of the outer tube located in the main wind direction, and a convex tooth is provided on one side of the inner tube located in the main wind direction; The vertical bracket lifting mechanism includes a gear, which is fixedly connected to the outer tube of the vertical bracket through a fixing assembly, and the gear is arranged on the side of the opening portion. A rocker for driving the gear to rotate is also provided on the gear. Under the drive of the rocker, the gear is engaged with the convex tooth to realize the up and down movement of the inner tube in the outer tube.

4. The sandstorm protection system for desert areas according to claim 3 is characterized by: The outer tube and the inner tube of the vertical support are composed of galvanized square steel, with a cross-sectional width of 10-15 cm and a height of 4-10 cm.

5. The sandstorm protection system for desert areas according to claim 3 is characterized by: The inner tube of the vertical support is 2-4 mm thinner than the outer tube.

6. The sandstorm protection system for desert areas according to claim 2 is characterized by: The spacing between the foundation piles is 2-4m, the buried depth of the foundation piles is 1.5-3m, and the height above the ground surface is 0.3-1m.

7. The sandstorm protection system for desert areas according to claim 2 is characterized by: The foundation piles include cylindrical cement piles with a diameter of 15-30 cm, and a galvanized steel pipe connection section with a diameter of 10 cm is pre-buried on the top of the cylindrical cement piles.

8. The sandstorm protection system for desert areas according to claim 2 is characterized by: The foundation piles include galvanized steel pipe screw piles with a diameter of 10 cm.

9. The sandstorm protection system for desert areas according to claim 2 is characterized by: The slide rail comprises a C-shaped square steel with an opening facing upward, a cross-sectional width of 10-15 cm, a height of 4-10 cm, and a length of 4-7 m.

10. The sandstorm protection system for desert areas according to claim 2 is characterized by: The tilt bracket comprises galvanized square steel with a cross-sectional width of 10-15 cm and a height of 4-10 cm.

11. The sandstorm protection system for desert areas according to claim 2 is characterized by: The inclined keel comprises a C-shaped square steel with an opening facing downward, a cross-sectional width of 10-15 cm, and a height of 4-10 cm.

12. The sandstorm protection system for desert areas according to claim 1 is characterized by: The channel side plates and guide plates are both rectangular frame structures welded from round steel, on which a HDPE net with a porosity of 30% to 45% is bound and fixed.

13. The sandstorm protection system for desert areas according to claim 1 is characterized by: The one-way sand-blocking fence is arranged in the upwind area of ​​the outer periphery of the photovoltaic field and is within a range of 50-300m from the edge of the photovoltaic field.

14. The sandstorm protection system for desert areas according to claim 1 is characterized by: The four corners of each guide plate and the channel side plate are welded and fixed to each other using connecting rods.

15. The sandstorm protection system for desert areas according to claim 14 is characterized by: The connecting rod is a round steel with a diameter of 2-4 cm. The two ends of the connecting rod are respectively welded and fixed on the four corners of the channel side plates and the guide plates to fix multiple channel side plates and guide plates to each other to form an integral structure.

16. The sandstorm protection system for desert areas according to claim 1 is characterized by: The width of the channel side panels along the main wind direction is 3-6m, the height is 1-1.5m, and the spacing between two adjacent channel side panels is 1.5-2.5m.

17. The sandstorm protection system for desert areas according to claim 1 is characterized by: The guide plate has a length of 1-2 m and a height of 1-1.5 m.

18. The sandstorm protection system for desert areas according to claim 1 is characterized by: The vertical pole is a round steel with a diameter of 3-4 cm, which is inserted into the ground, wherein the underground burial depth is 50-100 cm and the above-ground leakage height is 2.0-2.5 m.

19. The sandstorm protection system for desert areas according to claim 1 is characterized by: A plurality of the vertical poles are bound together with the side edges of the channel side plates and the guide plates to fix the channel side plates and the guide plates.

20. The sandstorm protection system for desert areas according to claim 1 is characterized by: The semicircular grass grids are arranged according to specifications of 1m×1m or 1.5m×1.5m.

21. A method for protecting against sandstorms in desertified areas, characterized in that: The protection method is implemented based on the sandstorm protection system for desert areas according to any one of claims 1 to 20, and the protection method includes: The photovoltaic device array is arranged in the photovoltaic field area, and the position of at least one anti-sand burial photovoltaic device in the photovoltaic device array and / or the distance and / or angle between the photovoltaic panel and the ground in at least one anti-sand burial photovoltaic device are adjusted to adjust the intensity of the sweeping wind passing through the air supply channel, thereby suppressing the damage of sand accumulation and wind erosion to the photovoltaic device array, wherein the air supply channel is formed between the photovoltaic panel and the ground; Multiple one-way sand-blocking fences and multiple semicircular grass grids are alternately arranged along the main wind direction in the upwind area of ​​the photovoltaic field, and the multiple one-way sand-blocking fences and multiple semicircular grass grids are perpendicular to the main wind direction, and blank strips are arranged between adjacent one-way sand-blocking fences and semicircular grass grids to form a strip-shaped wind and sand protection unit, thereby reducing the amount of sand entering the photovoltaic field; The spacing between two adjacent rows of anti-sand burial photovoltaic devices is 6-10m, and the spacing between two adjacent anti-sand burial photovoltaic devices in each row is 2-4m; the width of the one-way sand barrier is 3-6m, the width of the semicircular grass grid is 20-50m, and the width of the blank strip is 5-10m; The backlight surface of the photovoltaic panel is arranged upwind of the light-receiving surface, and the photovoltaic panel is arranged obliquely and cooperates with the ground to form an air supply channel; The one-way sand-blocking fence includes a plurality of channel side panels, guide plates and connecting rods, and both ends of the channel side panels and the guide plates are tied and fixed on the vertical poles inserted into the ground; the plurality of channel side panels are arranged in parallel in multiple rows along the main wind direction; between two adjacent channel side panels, a plurality of pairs of guide plates are arranged in pairs through the connecting rods, each pair of guide plates is opposite to each other at an acute angle of 20-40 degrees, and an opening of 30-50 cm is maintained at one end close to each other, and the narrow opening direction of each pair of guide plates is toward the outer upwind direction of the photovoltaic array, and the wide opening direction is toward the inner downwind direction of the photovoltaic array; The semicircular grass grid includes a straw rope and a plurality of plant straw bundles, wherein the plurality of plant straw bundles are distributed in sequence along the length direction of the straw rope, wherein the plant straw bundle has a semicircular structure formed by wrapping a plurality of plant straws in the middle with the straw rope, and the plant straw bundle is fixed on the flowing sand surface in the upwind direction of the periphery of the photovoltaic array area through branches with leaves, and the semicircular surface of the plant straw bundle is arranged perpendicular to the sand surface.

Images