Wind and sand prevention and control system suitable for periphery of photovoltaic power station in desert area

Abstract

The utility model relates to the field of wind-sand prevention and control, in particular to a wind-sand prevention and control system suitable for the periphery of a photovoltaic power station in a desert area. The wind and sand prevention device comprises a windward side wind and sand prevention module and a leeward side wind and sand prevention module, the windward side sand-proof module is arranged on the windward side of the photovoltaic power station; the windward side sand-proof module comprises a first sand blocking area, a first sand fixing area and a first sand conveying area which are sequentially arranged at intervals from outside to inside; the leeward-side sand-proof module is arranged on the leeward side of the photovoltaic power station; the leeward side sand-proof module comprises a second sand blocking area, a second sand fixing area and a second sand conveying area which are sequentially arranged at intervals from outside to inside; a good desertification control effect is achieved by arranging the sand blocking area, the sand fixing area and the sand conveying area, selecting mature desertification control measures and matching with different measure material attributes and specifications, the system adapts to different photovoltaic power station environments in the desert area by increasing and decreasing the number and volume of all measures in the system, and good plasticity is achieved; and the sand prevention effect can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of wind and sand prevention, and in particular to a wind and sand prevention system suitable for the periphery of a photovoltaic power station in a desert area. Background Art

[0002] The construction of photovoltaic power stations in desert areas is mostly in the form of a planar layout. Compared with the wind and sand control system of linear projects such as roads and railways, the periphery of photovoltaic power stations requires multilateral and differentiated control. At present, the wind and sand control measures that are widely used in photovoltaic power stations in desert areas mainly include grass grid sand barriers, high vertical sand barriers, windbreaks, etc., and the functions of each measure are different. In the actual application of wind and sand control projects, a single measure is rarely used for protection, and there are many shortcomings: first, the adaptability of the technology is insufficient, and it is difficult to be effective in the harsh desert environment; second, the high cost and difficulty of technical implementation limit its widespread application in desert areas; third, the effect of the technology is often not lasting, and there is a lack of systematic and comprehensive solutions; finally, the lack of a long-term monitoring and evaluation mechanism makes it impossible to continuously monitor and improve the effect of ecological restoration. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the utility model provides a wind and sand prevention system suitable for the periphery of a photovoltaic power station in desert areas, which can effectively improve the sand prevention effect.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The utility model provides a wind and sand prevention system suitable for the periphery of a photovoltaic power station in a desert area, which is characterized by comprising a windward side wind and sand prevention module and a leeward side wind and sand prevention module.

[0006] The windward side sand-proof module is arranged on the windward side of the photovoltaic power station; the windward side sand-proof module comprises a first sand-blocking area, a first sand-fixing area and a first sand-transporting area which are arranged in sequence from the outside to the inside.

[0007] The leeward side sand-proof module is arranged on the leeward side of the photovoltaic power station; the leeward side sand-proof module comprises a second sand-blocking area, a second sand-fixing area and a second sand-transporting area which are arranged in sequence from the outside to the inside.

[0008] Preferably, the first sand transport area includes a first sand retaining embankment and a first sand transport ditch arranged on a side thereof.

[0009] Preferably, the second sand transport area includes a second sand retaining embankment and a second sand transport ditch arranged on the side thereof.

[0010] Preferably, the surface layer of the sand retaining embankment is covered with gravel.

[0011] Preferably, the sand-blocking area includes a plurality of sand-blocking fences arranged at intervals and arranged in sequence from high to low; the sand-blocking fences include a first sand-fixing net and columns penetrating the first sand-fixing net.

[0012] Preferably, the number of sand-blocking fences in the first sand-blocking zone is greater than the number of sand-blocking fences in the second sand-blocking zone.

[0013] Preferably, the first sand-fixing net is made of metal mesh or high-density polyethylene; the porosity of the first sand-fixing net is gradually increased from high to low.

[0014] Preferably, the sand fixation area includes a plurality of square sand barriers, which are arranged from dense to sparse from the outside to the inside.

[0015] Preferably, a photovoltaic power station protection net is provided between the sand transport ditch and the photovoltaic power station.

[0016] Preferably, the photovoltaic power station protection net includes a second sand-fixing net and pillars passing through the second sand-fixing net.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The sand-blocking area of ​​the utility model uses multi-layer sand-blocking fences to dissolve and break up the accumulated sand, slow down the speed and volume of the sand dunes, and maintain the ecological stability and ecological environment integrity of the project area; a sustainable sand prevention system is formed by setting up a sand-fixing area; the sand transporting area allows the wind and sand flow to carry away the sand more smoothly, and it cannot accumulate to form an accumulated sand body, effectively preventing the accumulated sand body from gathering and invading the interior of the photovoltaic power station; the use of a coordinated and comprehensive management method of sand blocking, sand fixing and sand transport to prevent and control wind and sand on the periphery of the photovoltaic power station can effectively improve the sand prevention effect; and the utility model does not need to clean up a large amount of accumulated sand during use, has a low maintenance cost in the middle and late stages, has strong sustainable protection, and has a long service life, and will not cause fragmented damage to the environment. It is a sand control solution based on nature. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the plan view of the wind and sand control system on the windward side of the photovoltaic power station;

[0021] Figure 2 It is a schematic diagram of the side cross-sectional structure of the windward side sand control system of the photovoltaic power station;

[0022] Figure 3This is a schematic diagram of the plan view of the wind and sand control system on the leeward side of the photovoltaic power station;

[0023] Figure 4 It is a schematic diagram of the side cross-sectional structure of the wind and sand prevention system on the leeward side of the photovoltaic power station;

[0024] Figure 5 This is a schematic diagram of the sand barrier structure;

[0025] Figure 6 This is a schematic diagram of the protective net structure of a photovoltaic power station;

[0026] Figure 7 This is the plan of the wind and sand prevention system outside the photovoltaic power station;

[0027] In the figure, 1, the first sand-blocking area; 1-1, the first sand-blocking fence; 1-2, the second sand-blocking fence; 1-3, the third sand-blocking fence; 2, the first sand-fixing area; 2-1, the first grid sand barrier; 2-2, the second grid sand barrier; 3, sand-loving plants; 4, the first sand-blocking embankment; 5, the first sand-transporting ditch; 6, the photovoltaic power station protection net; 7, the photovoltaic panels; 8, the gravel; 9, the sand-blocking area; 10, the sand-fixing area; 11, the sand-transporting area; 12, the second sand-blocking area; 13, the second sand-fixing area; 14, the second sand-blocking embankment; 15, the second sand-transporting ditch; 16, the first sand-fixing net; 17, the pillars. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 should fall within the scope of protection of the present invention.

[0029] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0030] The utility model provides a wind and sand prevention system suitable for the periphery of a photovoltaic power station in a desert area, characterized in that it comprises a windward side wind and sand prevention module and a leeward side wind and sand prevention module; the windward side wind and sand prevention module is arranged on the windward side of the photovoltaic power station; the windward side wind and sand prevention module comprises a first sand blocking area 1, a first sand fixing area 2 and a first sand transporting area which are sequentially arranged from the outside to the inside; the leeward side wind and sand prevention module is arranged on the leeward side of the photovoltaic power station; the leeward side wind and sand prevention module comprises a second sand blocking area 12, a second sand fixing area 13 and a second sand transporting area which are sequentially arranged from the outside to the inside.

[0031] The first sand transport area includes a first sand retaining embankment 4 and a first sand transport ditch 5 arranged on the side thereof; the second sand transport area includes a second sand retaining embankment 14 and a second sand transport ditch 15 on the side thereof. The sand retaining embankment uses local sand collection to form a sand pile with a height of ≥0.5m, and the surface is covered with block gravel 8 to increase the surface roughness and reduce the surface wind speed near the photovoltaic power station area; the depth of the sand transport ditch is ≥0.5m and the width is ≥2m. When the wind and sand flow passes through the sand transport ditch, the sand transport ditch changes the wind and sand movement characteristics outside the photovoltaic power station, so that the wind and sand flow with lower energy potential characteristics flows along the cross section of the sand transport ditch, achieving the effect of sand transport and diversion; the sand transport area 11 is arranged in a "well" shape around the photovoltaic power station, so as to facilitate the diversion of the accumulated sand body in accordance with the wind direction.

[0032] The sand-blocking area 9 includes a plurality of sand-blocking fences; the sand-blocking fences include a first sand-fixing net 16 and a column 17 penetrating the first sand-fixing net 16. The material of the first sand-fixing net is a metal mesh or a high-density polyethylene (HDPE). The porosity of the first sand-fixing net gradually increases from high to low, forming a mesh structure that is sparse on top and dense on the bottom. The number of sand-blocking fences in the first sand-blocking area 1 is greater than the number of sand-blocking fences in the second sand-blocking area 12. The sand-blocking fence group is arranged from high to low around the periphery of the photovoltaic power station. One to more sand-blocking fences are arranged for areas with different degrees of wind and sand hazards. On the windward side of the photovoltaic power station, the number of sand-blocking fences is greater than the number of sand-blocking fences on the leeward side of the photovoltaic power station.

[0033] The sand fixation area 10 includes a number of square sand barriers, which are arranged from dense to sparse around the periphery of the photovoltaic power station, and are laid with a width of 10m-50m for areas with different degrees of wind and sand hazard. On the windward side of the photovoltaic power station, the number of square sand barriers is greater than the number of square sand barriers on the leeward side of the photovoltaic power station, and the specifications of the square sand barriers are greater than or equal to the specifications of the square sand barriers on the leeward side of the photovoltaic power station; the square sand barrier group on the windward side uses two specifications of length and width 0.5m×0.5m, height 0.2m and length and width 1m×1m, height 0.3m; the square sand barrier on the leeward side uses two specifications of length and width 1m×1m, height 0.3m or 1.5m×1.5m, height 0.3m; sand plants 3 such as Haloxylon ammodendron are arranged in the square sand barriers.

[0034] A photovoltaic power station protection net 6 is arranged between the sand transport ditch and the photovoltaic power station. The mesh density of the photovoltaic power station protection net 6 increases from sparse to dense from top to bottom, and the photovoltaic power station protection net 6 is close to the ground surface.

[0035] The utility model is a composite sand control system, which uses the principle of "blocking, consolidating and transporting" sand control, selects mature sand control measures, and matches the material properties and specifications of different measures to achieve a good sand control effect of 1+1>2. By increasing and decreasing the number and volume of various measures within the system, it adapts to different photovoltaic power station environments in desert areas and has good plasticity. According to different types and degrees of sand damage, based on the composite action mechanism of different sand control measures, a sand control model with multiple superimposed measures is constructed.

[0036] like Figure 1 and Figure 2 As shown, the first sand blocking area 1 uses three sand blocking fences as a group, which are arranged perpendicular to the main wind direction. A first blank strip with a width of H1 is set between the first sand blocking fence 1-1 and the second sand blocking fence 1-2, a second blank strip with a width of H2 is set between the second sand blocking fence 1-2 and the third sand blocking fence 1-3, and a third blank strip with a width of H3 is set between the third sand blocking fence 1-3 and the first square sand barrier 2-1. The width of the blank strip is H1<H2<H3, and the heights of the first sand blocking fence 1-1, the second sand blocking fence 1-2 and the third sand blocking fence 1-3 are arranged from high to low within the range of 2.5m-1m. Specifically, the first sand-blocking fence 1-1 is set at 50m-100m of the photovoltaic power station, with a height of 2m-2.5m; the second sand-blocking fence 1-2 is set at 25m-50m of the photovoltaic power station, with a height of 1.5m-2m; the third sand-blocking fence 1-3 is set at 10m-25m of the photovoltaic power station, with a height of 1m-1.5m.

[0037] The first sand fixation area 2 uses two different specifications of square sand barriers as a group. The first square sand barrier 2-1 has a size combination of 0.5m×0.5m and 1m×1m. The second square sand barrier 2-2 has a size of 1m×1m and 1.5m×1.5m. The first square sand barrier 2-1 and the second square sand barrier 2-2 form an arrangement from dense to sparse perpendicular to the windward side.

[0038] In the second grid sand barrier 2-2, sand-loving plants 3 such as Haloxylon ammodendron are planted in combination with biological sand control measures, and artificial irrigation and other measures are used to form biological sand control. As the plants grow, the comprehensive wind and sand protection effect of the wind and sand control system will become better and better, and ultimately the plants and sand control measures will form a benign and sustainable sand control system.

[0039] The first sand transport area is composed of the first sand barrier 4 and the first sand transport ditch 5. The width of the first sand transport ditch 5 is ≥2m and the depth is ≥0.5m. The earth excavated from the first sand transport ditch 5 is accumulated on the windward side, and the surface of the sand embankment formed is covered with gravel 8, forming a sand barrier with a height of ≥0.5m. Under continuous movement, the wind and sand flow has passed through the first half of the sand barrier area 9 and the sand fixation area 10. The wind speed is reduced, the volume of the accumulated sand body is reduced, and it is constantly approaching the first sand barrier 4. The surface gravel 8 increases the surface roughness and raises the terrain at the same time, so that when the wind and sand flow crosses the first sand barrier 4, a certain projection angle is generated, further aggregating more energy and falling into the first sand transport ditch 5. The first sand transport ditch 5 surrounds the periphery of the photovoltaic power station, so that the wind and sand flow with lower potential energy characteristics flows along the sand transport ditch and is finally exported downwind.

[0040] like Figure 3 and Figure 4 The leeward edge of the photovoltaic power station shown is a secondary location for photovoltaic power stations in desert areas to control sand damage. In addition to the single dominant wind direction, the wind direction in the desert area is changeable, and certain wind and sand control measures are also required in the secondary wind direction erosion area. The wind and sand control system in this area mainly includes the second sand blocking area 12, the second sand fixation area 13 and the second sand transport area. Among them, the specification area of ​​the second sand blocking area 12 and the second sand fixation area 13 is smaller than that of the windward area, and the number of measures is reduced.

[0041] The second sand-blocking area 12 is composed of one sand-blocking fence as a group, which is arranged perpendicular to the main wind direction. A blank zone with a width of H4 is arranged between the sand-blocking fence and the second sand-fixing area 13, and the height of the sand-blocking fence is set between 1m and 2.5m.

[0042] The second sand fixation area 13 uses a group of square sand barriers of different specifications, and the size of the square sand barriers can be any one of 1m×1m and 1.5m×1.5m. In the square sand barriers, the biological sand control measures are combined with the planting of sand plants such as Haloxylon ammodendron, and artificial irrigation and other measures are combined to form biological sand control. With the growth of plants, the comprehensive wind and sand protection effect of the wind and sand control system will become better and better, and finally the plants and sand control measures will form a benign and sustainable sand control system.

[0043] The second sand transport area is composed of the second sand retaining embankment 14 and the second sand transport ditch 15. The width of the second sand transport ditch is ≥2m and the depth is ≥0.5m. The earth excavated from the second sand transport ditch is piled up on the windward side, and the surface of the sand embankment formed is covered with gravel 8, forming the second sand retaining embankment 14 with a height of ≥0.5m. Under continuous movement, the wind and sand flow has passed through the first half of the sand blocking area 9 and the sand consolidation area 10. The wind speed is reduced, the volume of the accumulated sand body is reduced, and it is constantly approaching the second sand retaining embankment 14. The surface gravel 8 increases the surface roughness and raises the terrain at the same time, so that when the wind and sand flow crosses the second sand retaining embankment 14, a certain projection angle is generated, further aggregating more energy and falling into the set second sand transport ditch 15. The second sand transport ditch 15 surrounds the periphery of the photovoltaic power station, and each side is extended to the outermost circle, so that the wind and sand flow with lower potential energy characteristics flows along the sand transport ditch and is finally exported downwind.

[0044] like Figure 5 As shown, the sand-blocking fence is a mesh structure, and the mesh density is from sparse to dense from top to bottom. The top mesh is used to block the sand jumping in the air, and the dense mesh at the bottom is used to block the overall moving sand dunes. In order to reduce the impact on plant growth and animal activities in desert areas, the first sand-fixing net 16 leaves a gap with the ground.

[0045] like Figure 6 As shown, the photovoltaic power station protection net 6 also serves as a sand-blocking fence. As the last line of defense of the wind and sand prevention system outside the photovoltaic power station, it must protect the photovoltaic power station from interference from human factors while also taking into account the sand-blocking effect. The mesh density of the photovoltaic power station protection net 6 increases from sparse to dense from top to bottom. The top mesh is used to block the sand jumping in the air, and the lower dense mesh is used to block the overall moving sand dunes. The photovoltaic power station protection net 6 includes a second sand-fixing net 18 and a column 17 that runs through the first sand-fixing net 16. The second sand-fixing net 18 is close to the ground surface. Different from the sand-blocking fence in the sand-blocking area 9, there is no gap between the bottom of the structure and the ground. A larger mesh density is used instead. One is to prevent interference from human factors, and the other is to prevent the moving sand dunes from moving forward and causing the photovoltaic panels 7 to be buried in sand.

[0046] like Figure 7As shown, the utility model provides a wind and sand prevention and control system suitable for the periphery of photovoltaic power stations in desert areas. On the basis of fully understanding the laws of wind and sand activities, a long-term sustainable protection system is established in the quicksand area dominated by a single wind direction. Along the dominant direction of the wind and sand flow, a sand blocking area 9, a sand consolidation area 10 and a sand transport area 11 are sequentially arranged on the upwind side of the periphery of the photovoltaic power station. There are spacings between the sand blocking area 9 and the sand consolidation area 10, and between the sand consolidation area 10 and the sand transport area 11, so as to increase more sand accumulation space. The sand transport area 11 is close to the photovoltaic power station. The sand blocking fence group and the grid sand barrier group are arranged in sequence from high to low. With the help of the natural wind speed and wind conditions of the project area, the forward-moving sand dunes are prevented and controlled. The outermost sand blocking area 9 uses multiple layers of sand blocking fences to dissolve and break up the accumulated sand bodies, slow down the forward movement speed and volume of the sand dunes, and maintain the ecological stability and ecological environment integrity of the project area. The sand transport area 11 allows the wind and sand flow to carry away the sand more smoothly, and it cannot accumulate to form an accumulated sand body, effectively preventing the accumulated sand body from gathering and invading the interior of the photovoltaic power station.

[0047] The utility model sets up sand-blocking areas, sand-fixing areas and sand-transporting areas, utilizes the wind-sand prevention and control principle of "blocking, fixing and transporting", selects mature sand-control measures, and matches the material properties and specifications of different measures to achieve a good sand-control effect of 1+1>2. By increasing and decreasing the number and volume of various measures within the system, the utility model adapts to different photovoltaic power station environments in desert areas and has good plasticity; it can effectively improve the sand-control effect; and the utility model does not require a large amount of cleaning of accumulated sand during use, so the mid- and late-stage maintenance cost is low, the sustainable protection is strong, the service life is long, and it will not cause fragmented damage to the environment. It is a nature-based sand-control solution.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

Claims

1. A sandstorm prevention system suitable for the periphery of photovoltaic power stations in desert areas, characterized in that: It includes a windward side anti-sand module and a leeward side anti-sand module; The windward side sand-proof module is arranged on the windward side of the photovoltaic power station; the windward side sand-proof module comprises a first sand-blocking area (1), a first sand-fixing area (2) and a first sand-transporting area which are arranged in sequence from the outside to the inside; The leeward side sand-proof module is arranged on the leeward side of the photovoltaic power station; the leeward side sand-proof module comprises a second sand-blocking area (12), a second sand-fixing area (13) and a second sand-transporting area which are arranged in sequence from the outside to the inside.

2. The sandstorm prevention system suitable for the periphery of a photovoltaic power station in a desert area according to claim 1, characterized in that: The first sand transport area comprises a first sand retaining embankment (4) and a first sand transport ditch (5) arranged on the side thereof.

3. The sandstorm prevention system suitable for the periphery of a photovoltaic power station in a desert area according to claim 1, characterized in that: The second sand transport area comprises a second sand retaining embankment (14) and a second sand transport ditch (15) arranged on the side thereof.

4. A sandstorm prevention and control system suitable for the periphery of a photovoltaic power station in a desert area according to claim 2 or 3, characterized in that: The surface layer of the sand retaining embankment is covered with gravel (8).

5. The wind and sand control system suitable for the periphery of a photovoltaic power station in a desert area according to claim 1, characterized in that: The sand blocking area (9) comprises a plurality of sand blocking fences arranged at intervals and arranged in order from high to low; the sand blocking fences comprise a first sand fixing net (16) and a column (17) penetrating the first sand fixing net (16).

6. A sandstorm prevention and control system suitable for the periphery of a photovoltaic power station in a desert area according to claim 5, characterized in that: The number of sand-blocking fences in the first sand-blocking area (1) is greater than the number of sand-blocking fences in the second sand-blocking area (12).

7. The sandstorm prevention system suitable for the periphery of a photovoltaic power station in a desert area according to claim 5, characterized in that: The first sand-fixing net (16) is made of metal mesh or high-density polyethylene; the porosity of the first sand-fixing net (16) gradually increases from high to low.

8. The wind and sand control system suitable for the periphery of a photovoltaic power station in a desert area according to claim 1, characterized in that: The sand fixation area (10) comprises a plurality of square sand barriers, which are arranged from dense to sparse from the outside to the inside.

9. A sandstorm prevention and control system suitable for the periphery of a photovoltaic power station in a desert area according to claim 2 or 3, characterized in that: A photovoltaic power station protection net (6) is provided between the sand transport ditch and the photovoltaic power station.

10. A sandstorm prevention and control system suitable for the periphery of a photovoltaic power station in a desert area according to claim 9, characterized in that: The photovoltaic power station protection net (6) comprises a second sand-fixing net and a column (17) penetrating the second sand-fixing net (18).

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