JP3186319U - Base for installing photovoltaic module and its basic structure - Google Patents

Abstract

Provided are a solar power generation module installation base and a foundation structure thereof that can easily maintain and inspect the base after installation and can effectively use a lower space of the base.
A gantry 10 supports a photovoltaic power generation module at a predetermined inclination angle, and the gantry 10 is formed of a truss-like structural material. The truss-like structural material is composed of column members 10A, 10A ', diagonal members 11, and horizontal members, and the front and rear front column members 10A and rear column members 10A' in the truss-like structural member are connected to the gantry foundation. In the lower part of the module 12 formed between the front column member 10A and the rear column member 10A ′, the beam member for connecting the column members is not provided for a portion of 2.2 m or less. The lower space is used as a space for moving, working, or storing materials.
[Selection] Figure 1

Description

  The present invention relates to a solar power generation module installation base and its basic structure, and in particular, an installation base that can be used when installing a solar power generation device such as a solar panel outdoors, and the basic structure of the installation base About.

Recently, diversification of electric energy sources has been sought, but in particular, solar power generation has the advantage that it is inexhaustible and has little impact on the environment, and is a large-scale mega solar class (1000 kW class) solar power generation facility However, the problem is how to reduce the installation cost.
In particular, the cost required for the installation of a large-scale photovoltaic power generation facility is a solar module, a DC / AC converter, a mounting base and a base for supporting the module body.

  Among these, the installation cost of the solar module is coupled with mass production effects in overseas markets, and its manufacturing cost has been reduced. Especially in snowy areas, the cost of the module installation stand is around 60% of the module cost, It has come to occupy a considerable weight. Along with this, it is essential to reduce the installation cost of the gantry and the gantry foundation in order to reduce the cost of installing the photovoltaic power generation facility. For this reason, various efforts have been made to reduce the cost of the installation base and the foundation structure, but the installation location is outdoors. The weight of the module body, the weight of the base itself, and the typhoon are used for the installation base and the foundation. Sufficient durability and strength are required even for wind and seismic forces.

As a conventional installation stand, a device described in Japanese Utility Model Registration No. 3176859 (Patent Document 1) is known. The idea described in the publication is a support for installing a solar module inserted into the ground, and the support is provided with a plurality of stopper members, and the stopper members are formed in a truncated cone shape. In this device, when wind that causes lift to the solar module is blown out of the wind load, resistance is generated by the stopper member, so it is possible to prevent the column from coming out from the ground. At the same time, it is said that the installation work can be speeded up and the cost can be reduced.

In addition, the photovoltaic power generation array gantry described in Japanese Patent Application Laid-Open No. 2011-91166 forms a ventilation slit between the lower surface of the solar cell panel and airflow control by using an oblique member attached to a column of the gantry. A plate is provided, wind force is guided to the ventilation slit by the air flow control plate, and the lift generated in the solar cell panel is reduced by the downward component force generated in the air flow control plate. According to the present invention, since the lift generated in the gantry foundation can be a downward component force, it is possible to prevent the gantry from being blown up by wind pressure, and at the same time, the gantry weight is reduced and the foundation work is simplified. It can be achieved.

  Further, in the photovoltaic power generation module installation stand, the wind pressure load applied to the power generation module, which is a horizontal load, is about 10 times the vertical load compared to the weight of the power generation module and the weight of the stand. For this reason, the foundation foundation in consideration of this point is required for the foundation foundation because the upwind force of the foundation due to the overturning moment of the foundation due to the wind pressure load is dominant over the foundation shape rather than the pressure load against the earth strength. ing.

Utility Model Registration No. 3176859 JP 2011-911166 A

However, the device described in Patent Document 1 described above is suitable for a relatively light-weight solar power generation module, and is not suitable for a large-scale facility such as a mega-solar-class large-scale solar power generation facility. Moreover, although the photovoltaic power generation array mount described in Patent Document 2 leads to a reduction in the weight of the mount, the structure of the mount itself is complicated because an airflow control plate is installed between the bottom of the mount and the ground surface. There is a problem of deteriorating workability during inspection and maintenance of the lower part of the gantry.

On the other hand, the installation base for the solar concentrator increases the weight of the entire base when the span of the base becomes large, so the cost per kW of the solar power generation module rises, but the foundation work that supports the base The number of man-hours required for the construction can be reduced, and as a result, the construction cost of the entire construction can be reduced. In other words, the cost of the gantry and the installation cost of the foundation are in a trade-off relationship with the interval between the foundation diameters. Therefore, in order to improve the cost performance of the photovoltaic power generation facility, how to optimize the size of the gantry and the basic span of the gantry becomes a problem.

  In particular, in mega solar-class facilities, the total length of the gantry reaches 1000-1500 m / 1000 kW, so it is desirable that the structure be easy to maintain and maintain, such as wiring inspection work and weed removal work at the bottom of the gantry. . In addition, the foundation work in which concrete is placed on site has a problem that it causes an increase in construction time and labor, such as installation of a formwork, resulting in an increase in cost.

The present invention has been proposed to deal with the above-mentioned circumstances, and it is easy to maintain and inspect the frame after installation, and can effectively use the space below the frame. The purpose is to provide an installation stand.
In addition, when constructing a platform for installing a photovoltaic power generation module, it is possible to perform the foundation work quickly and easily, and it has excellent work efficiency in the field and has sufficient resistance to wind pressure load. The purpose is to provide a foundation structure for a power generation module installation base.

In order to achieve the above object, the device according to claim 1 is a pedestal supported by a foundation case having a foundation columnar portion and supporting a photovoltaic power generation module at a predetermined inclination angle, The truss-like structural material is composed of a pillar material, a diagonal material, and a horizontal material, and the front and rear front pillar materials and the rear pillar material in the truss-like structural material are the foundation frame. The beam material connecting between the front pillar material and the rear pillar material is not installed in a portion having a height of 2.2 m or less above the ground, and the module lower space is used for movement. It is characterized by being used as a space for work or material storage.

Invention of Claim 2 is the range between 4 m-6 m in said 1st, between the said front side pillar materials which adjoin in the said truss-like structure material, and between rear side pillar materials. It is characterized by being.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the foundation frame to which the truss-like structural material is connected and supported includes a divided foundation columnar portion and a foundation bottom plate, and the foundation columnar portion is a column body. A bottom surface of the column body portion having a larger area than the column body is provided at the lower end thereof, and an insertion hole through which the column body can be inserted is provided in the center portion of the foundation bottom plate. When burying the part and the foundation bottom slab in the soil, the foundation bottom slab is installed from above so that the pillar is fitted from the insertion hole, and the foundation bottom slab is placed on the bottom of the pillar part It is characterized by being comprised.

  The invention described in claim 4 is the device according to any one of the above items 1, 2, 2, 1 and 3, or 2 and 3, wherein a hook-shaped fixing member is attached to the foundation frame, and a lifting force is provided. It is characterized by the addition of resistance to resistance.

As described above, according to the invention described in each claim, maintenance / inspection work in the lower part of the photovoltaic power generation module mount is facilitated. In addition, since the foundation work at the installation site is minimized, it is possible to reduce the construction time and the number of work steps, thereby contributing to the reduction of the construction cost of the photovoltaic power generation facility.

It is a side view which shows the outline of the stand for photovoltaic power generation module installation based on one Embodiment of this invention. Similarly, it is the front view which looked at the platform for photovoltaic power generation module installation concerning one embodiment of the present invention from the front side. Similarly, it is the rear view which looked at the stand for photovoltaic power generation module installation concerning one embodiment of the present invention from the back side. Similarly, it is a graph which shows the relationship between the base diameter of the base for photovoltaic power generation module installation based on one Embodiment of this invention, and the base and foundation construction cost per kw. Similarly, it is explanatory drawing which shows embodiment of the foundation structure of the stand for photovoltaic power generation module installation based on this invention. Similarly, it is the figure which showed the foundation bottom slab which is a main structural member of the foundation structure of the stand for photovoltaic power generation module installation based on one Embodiment. It is sectional explanatory drawing which shows other embodiment of the foundation structure of the stand for photovoltaic power generation module installation based on this invention, and shows the foundation structure at the time of attaching the branch anchor as a hook-shaped fixing member to a foundation columnar part. Similarly, other embodiment of the foundation structure which supports the stand for photovoltaic power generation module installation of this invention is shown, and for the photovoltaic module installation which has the foundation structure installed using the bowl-shaped member shown in FIG. It is the side view which showed the mount.

  Hereinafter, a photovoltaic power generation module installation stand and a basic structure thereof according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a side view schematically showing a solar power module installation stand according to an embodiment of the present invention, FIG. 2 is a front view of the solar power module installation base 10 viewed from the front side, and FIG. It is the rear view which looked at the mount frame 10 for module installation from the back side.
As shown in FIGS. 1 to 3, an installation stand (galvanized steel stand) 10 is a truss-like structure including a column member 10A, a front diagonal member 10B, a rear diagonal member 10C, a front horizontal member 10D, and a rear horizontal member 10E. It is configured by combining structural materials (K-shaped truss).

  In the snowy area, the minimum ground height L1 of the solar power generation module 12 is preferably about 1.0 m or more, and the solar power generation module 12 is preferably set at an inclination angle of 30 to 40 degrees in consideration of natural snowfall. In the module installation stand 10, the front column member 10 </ b> A and the rear column member 10 </ b> A ′ are connected to a mount foundation described later.

As shown in FIG. 1, a triangular module lower space 14 surrounded by diagonal members 11 is formed below the module 12 between the front column member 10A and the rear column member 10A '. A horizontal member serving as a beam member is not connected between portions below the ground height dimension L2, that is, the front column member 10A and the rear column member 10A ′.
Thereby, the module lower space 14 can be used as a space for maintenance / inspection work of the power generation equipment. Further, the module lower space 14 can be used as a moving space for a small work vehicle used for a worker to walk in a standing posture or for weeding work, or as a space for storing materials. .

The optimum span for the installation cost of the photovoltaic power generation module installation base 10 and the foundation construction cost to be minimized was examined. FIG. 4 is a graph showing the relationship between the span diameter and the base / foundation cost per kW. As shown in the graph of FIG. 4, the installation platform 10 increases the weight of the platform (increased material cost) as the span between the foundations supporting the platform increases, leading to an increase in cost. In addition, the foundation construction cost of the pedestal also increases as the foundation span becomes shorter.
From the above, the total cost required for the gantry and foundation work can be improved cost-effectively by optimizing the foundation span. As a result of the examination, the span L3 between the front-side pillar material adjacent to the ground-mounted solar power generation module 10 and the rear-side pillar material is within a range of 4 m to 8 m, more preferably 5 m to It is economical to be within a range of 6 m.

Next, the basic structure of the photovoltaic power generation module installation stand according to the present invention will be described.
FIG. 5 is an explanatory view showing the basic structure of the installation stand buried in the ground. The foundation frame X that forms the main part of the foundation structure in the embodiment of FIG. 5 is configured to include a concrete foundation columnar portion 20 and a foundation bottom slab portion 30, and the foundation frame X is manufactured in advance in a factory. It is a so-called prefabricated member, and is carried into the installation site of the photovoltaic power generation module to perform installation work. The base columnar portion 20 has a column body 21 formed in a rectangular plane, and an anchor bolt 22 for fixing a solar power generation module installation base is provided on the upper portion. A column body bottom surface (footing) 24 is provided in the lower part, and the column body bottom surface 24 is installed on a basic soil 26 made of a rolled cobblestone or the like.

The wind pressure load of the platform for installing the solar power generation module is determined in accordance with the Building Standards Act, but when the elevation angle of the power generation module is 30 degrees or more, the wind pressure load is larger than the seismic load, Lifting capacity may exceed the ground bearing capacity of the foundation. That is, the wind pressure load applied to the module, which is a horizontal load, may be about 10 times the vertical load as compared to the vertical load that includes the module weight and the gantry weight. For this reason, in the gantry foundation, the windward lifting force generated by the tumbling moment of the gantry due to the wind pressure load is more dominant than the foundation shape, rather than the pressure load against the ground strength.

In order to prefabricate the foundation structure, in addition to the soil weight at the place where the foundation is installed, the size of the bottom 24 of the column (the width of the foundation bottom) and the depth of the foundation are problems. It is desirable to reduce the weight for transportation and installation work. However, when the weight is reduced, sufficient strength may not be ensured depending on the location due to restrictions such as wind strength and soil properties. In other words, if the gantry foundation is prefabricated, it becomes difficult to arbitrarily select the foundation bottom face width (footing width) and foundation depth in the column body bottom face 24, and both must be selected under certain restrictions. . Therefore, in this embodiment, the foundation frame X is obtained by using the foundation bottom plate 30 in addition to the foundation columnar portion 20 and appropriately combining the both to obtain a degree of freedom in selecting the foundation width and the foundation depth.

FIG. 6 is a view showing the foundation bottom slab 30. As shown in FIG. 6, the foundation bottom slab 30 is made of concrete having a predetermined thickness and a larger surface area than the bottom surface 24 of the column body portion. An insertion hole 32 that can be inserted by fitting the column 21 into the center is formed. As shown in FIG. 5, the foundation bottom plate 30 fitted to the column 21 is placed on the column body bottom 24 and by injecting mortar around the insertion hole 32, the column bottom 24. To prevent misalignment due to earthquakes.

As specific dimensions of the foundation columnar part 20 and the foundation bottom slab part 30, as shown in FIGS. 5 and 6, the vertical dimension of the portion embedded in the ground of the foundation columnar part 20 is 1200 mm, and the columnar part bottom surface 24. The base bottom width (footing width) is 500 mm, the thickness of the base bottom plate 30 is 100 mm, and the width is 1000 mm. The foundation frame X shown in these drawings is suitable when the gap between the foundations is 5 to 6 m.
In the present embodiment, the planar shapes of the foundation columnar portion 20 and the foundation bottom slab portion 30 are rectangular planes. However, the planar shape is not limited to this, and may be a circular plane.

Thus, according to the foundation structure of the installation stand according to the present embodiment, since the foundation bottom slab 30 is placed on the column body bottom surface 24, the weight of the entire foundation frame X can be increased. It becomes possible to increase the value of the falling moment. That is, as shown in FIG. 4, when the foundation lifting reaction force is insufficient after the foundation columnar portion 20 is installed, the foundation bottom plate 30 and the column body are inserted by inserting the foundation bottom plate 30 from the top of the column body 21. The loaded soil weight on the bottom surface 24 can be increased. For this reason, it becomes possible to select whether or not to install the foundation bottom slab 30 in consideration of the soil characteristics (rest angle θ, unit weight ρ (t / m ³ )) of the installation location. The degree of freedom during conversion is improved.

In addition, if the foundation columnar part 20 and the foundation bottom slab part 30 having different sizes and weights are prefabricated and prepared in advance, they can be carried into the installation site with different installation conditions and installed. The number of work steps can be reduced, and the cost of foundation work when installing the photovoltaic power generation module can be reduced.

FIG. 7-1 is a cross-sectional explanatory view showing a foundation structure in the case where a branch anchor as a hook-like fixing member is attached to the foundation columnar portion and resistance force is added to the lifting force acting on the foundation, FIG. [FIG. 7] It is the side view which showed the mount stand for solar module installation which has the basic structure installed using the bowl-shaped member of FIG.
As shown in FIGS. 7A and 7B, in the basic structure in the present embodiment, a branch anchor 40 is provided as a flange-like member on the basic columnar portion 20 to add resistance. The branch anchor 40 includes a resistance plate 41 that is driven into the ground, a stabilization plate 42, a rod 44, and the like. The rod 44 is connected to the base columnar portion 20 directly or via a wire (not shown). ing.

The branch anchor 40 is used to prevent the inclination and collapse of the electric pole from strong winds and snow, etc., and is driven by the influence of wind force and the like by driving the resistance plate 41 and the stabilization plate 42 into the ground. With respect to the lifting force acting on the housing X, the resistance force can be greatly increased. Further, when the above-described foundation bottom plate 30 is installed in the foundation casing X, it is possible to further increase the resistance. As shown in FIG. 7-2, the branch anchors 40 are installed one by one with respect to one foundation frame X, but the number can be increased according to the ground conditions and the conditions of the installation location. is there.

As described above, according to the photovoltaic power generation module installation stand of the present embodiment, it becomes possible to use the module lower space as a space for movement or work, storage of materials, etc. Can be used effectively.
In addition, according to the foundation structure of the photovoltaic power generation module installation stand of the present embodiment, it is possible to reduce the construction cost required for the foundation work, and it is possible to reduce the construction cost of a large-scale photovoltaic power generation facility It is.

According to the present invention, since the space and height of the module lower space are sufficiently secured, maintenance and inspection of the mount after installation is easy, and the lower space of the mount can be used effectively. . In addition, when constructing the solar power generation module installation stand, it is possible to prefabricate the foundation part, which is excellent in work efficiency at the construction site, with sufficient resistance against wind pressure load, construction cost, Contributes to reduction of construction time.

10 Photovoltaic module installation stand 10A 10A 'Column material (front column material, rear column material)
10B Side diagonal material 10C Front diagonal material 10C 'Back diagonal material 11 diagonal material 12 Photovoltaic power generation module X foundation frame 20 foundation columnar part 21 pillar body 22 anchor bolt 24 pillar body bottom face 26 foundation soil 30 foundation bottom plate 32 insertion hole 40 branch line Anchor 41 Resistance plate 42 Stabilization plate 44 Rod

The invention described in claim 4 is characterized in that , in any one of the above-mentioned items 1 to 3 , a hook-shaped fixing member is attached to the foundation casing, and resistance to lifting force is added.

Claims (4)

A pedestal supported by a foundation housing having a foundation columnar part and supporting a photovoltaic power generation module at a predetermined inclination angle,
The gantry is formed of a truss-like structural material, and the truss-like structural material includes a pillar material, a diagonal material, and a horizontal material, and front and rear front pillar materials and a rear pillar material in the truss-like structural material. Are connected to the foundation frame, and the beam members that connect the front and rear column members are not installed in the area where the ground height is 2.2 m or less. A stand for installing a solar power generation module, characterized by being used as a space for moving, working, or storing materials.   2. The sun according to claim 1, wherein a span between the adjacent front pillars and a rear pillar in the truss-like structural member is within a range of 4 m to 6 m. A stand for installing photovoltaic modules. The foundation frame to which the truss-like structural material is connected and supported includes a divided foundation columnar portion and a foundation bottom plate,
The foundation columnar portion has a column body, and a bottom surface of the column body portion having a larger area than the column body is provided at the lower end thereof, and an insertion hole through which the column body can be inserted into the center portion of the foundation bottom plate Is provided,
When the foundation columnar part and the foundation bottom slab are embedded in the soil, the foundation bottom slab is installed from above so that the pillar body is fitted from the insertion hole, and the foundation bottom slab is placed on the bottom of the column body part. The foundation structure of the mount for installing a solar power generation module according to claim 1 or 2, wherein A hook-shaped fixing member is attached to the foundation frame, and a resistance against a lifting force is added to the base frame. The claim 1, the claim 1, the claims 1 and 3, or the claims 2 and 3 The foundation structure of the installation stand for solar power generation modules described.

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