WO2019209097A1

WO2019209097A1 - Container device for equipment used to supply electricity by means of alternative energy generation

Info

Publication number: WO2019209097A1
Application number: PCT/MX2018/000042
Authority: WO
Inventors: Rubén RECIO GUERRA
Original assignee: Recio Guerra Ruben
Priority date: 2018-04-25
Filing date: 2018-04-25
Publication date: 2019-10-31

Abstract

The invention relates to a container for equipment used to supply electricity generated from alternative energies, with battery storage and network interconnection, said container housing the energy sources and the rest of the components, which are secured for transport and subsequent use by means of devices suitable for supporting said equipment during operation. The container, which is in the shape of a rectangular parallelepiped, comprises a plurality of photovoltaic cells, a plurality of wind turbines, a fuel generator set, a battery bank, a system for raising the photovoltaic panels, a system for cooling the batteries and a plurality of inverters, as well as the electronics and other means for generating, storing and transferring electric energy. The structures supporting the solar panels can be oriented towards the outside of the container using reinforced wedges or hinges mounted on the top plates of the walls of the container, which are moved and placed in the desired position by actuator arms.

Description

DEVICE CONTAINER OF EQUIPMENT FOR SUPPLY OF

ELECTRICITY THROUGH GENERATION OF ALTERNATIVE ENERGIES

TECHNICAL FIELD OF THE INVENTION

The present invention relates in general to the generation of electric energy by alternative methods, particularly, this invention is directed to containers adapted as electricity supply stations.

BACKGROUND OF THE INVENTION

Until a few decades ago worldwide it was assumed that energy resources were virtually unlimited to meet all the energy needs of consumers, the only restriction being the coverage or level of expansion of transmission and distribution networks, this situation gradually begins to change in the wake of the oil crisis that occurred in the 1970s when fuel prices increased markedly, it is at this point that both governments and consumers perceived that the energy supply was vulnerable. Although the oil crisis of the 1970s was a geopolitical situation, the crisis that is gradually glimpsing on the horizon is even more disturbing for everyone, the imminent depletion of fossil fuel resources added to global warming a challenge for humanity, and in this context the generation of electrical energy plays a fundamental role if it is considered that a significant percentage of electricity is generated from petroleum-derived fuels.

The problem is that fossil fuel consumption has an adverse environmental impact and human health because it generates harmful substances such as C02 resulting in Global warming (Ristinen R., Kraushaar J. 2006).

The transition of fossil fuels to new energy sources is very important, not only because of the uncertainty of obtaining more reserves of fossil fuels, but because of the environmental damage that fossil fuels generate in the environment.

On the other hand, the most vulnerable agent in the event of an energy crisis is the concessionaire of the distribution service which is exposed to the volatility of market prices that at certain times of the day can have a cost well above the regulated rate What the customer has. Within this described scenario, the convenience of the company to implement energy efficient plans and programs among its clients is seen, in order to achieve an efficient use of the available technical and economic resources.

Incentivizing the efficiency of consumption, in addition to the direct benefit to the users themselves, results in the saving of important economic resources destined for the use of energy, deferring investments in new generation capacity to meet demand, the possibility to provide the electric service to new customers with the same resources, as well as to manage supply crisis scenarios in a better way avoiding the general rations of the electricity supply.

In the context of the operation of an electric power system, the activities of generation, transport and distribution fulfill the function of supplying the energy requirements of the demand, however addressing it constitutes a technological challenge that has no comparison with other industrial goods or products, This is because the physical laws that govern the behavior of an electrical system require that at all times there is a balance between production and demand, otherwise the entire system would collapse.

This characteristic forces that the production has to adjust every moment to the requirements of the demand, having to propose blocks of generation. Depending on the generation technology of the different plants, it will be necessary to have a certain percentage of reserve in standby conditions for when necessary, these units in reserve synchronize with the system and take charge. The cost of this generation “standby” or also called “spining reserve” or rolling reserve, it is high and depending on the organization of the sector, its costs must be covered by all the agents that benefit from this service. When electricity is produced through coal plants, nuclear power plants and others, certain by-products harmful to the environment are usually released.

In order to obtain a vast capacity of electrical energy, hundreds of natural habitats can be destroyed due to the space needed to produce it. There are millions of people who use electricity in an exaggerated way. This can be a great environmental waste especially if they are obtained from non-renewable sources. A third of the world's population lives without electricity (Gipe 2004), with third-world countries being the most affected, particularly rural areas far from cities. This lack of electricity has serious implications for the development, health and education of the inhabitants of these places, which is why organizations such as the World Bank are interested in combating this problem. As a possible solution, distributed generation has been proposed, which consists of generating electric power in the vicinity of the consumption centers, for this reason the electricity generation will be in small or medium scale (100 KW-10MW). Wind, Solar and mini-hydraulic systems, as well as hybrids between them, are suitable for this purpose, since they can generate the small amounts of energy that these regions require at a low maintenance cost and avoiding transmission losses that could present connecting the big power generation centers.

Due to the aforementioned, the importance of knowing the behavior of the demand can be appreciated, however the behavior referred to depends on many factors, such as the type of segment, whether residential, commercial, industrial, among others, the geographical area or region where it is located, the time of year, etc.

In the state of the art, there are methods and systems used to reduce energy consumption in electrical consumption devices that are described, for example, in patent applications US-2008293426-A1, US-2008293426-A1 and WO-2007102689 -A1 which, however, are focused on reducing consumption, so they do not involve solutions to the previously described drawbacks.

Before the drawbacks of the prior art, it was desirable to develop a system that would overcome the unfavorable phenomena described above. In the prior art, mobile electrical power generation systems using at least one renewable energy source are known.

Document ES 2 380 848 describes a power generating equipment by means of photovoltaic solar collection, transportable and applicable for power supply of communication systems in remote installations. Document CA 2 610 506 describes a mobile power generation equipment for use in remote areas, comprising a wind turbine, photovoltaic solar cell panels, a diesel generator and a rechargeable battery.

EP 2 727 253 describes a solar and wind power generation system that provides an ecological and portable system for generating electricity. The system includes a portable housing that has a roof along with solar modules.

US 7 821 147 describes a floating and towable portable platform for producing and storing electrical energy using wind, water and solar energy, or a combination of these methods. It also includes a diesel backup generator.

None of the aforementioned systems have a full capacity to replace diesel generators that are commonly used to meet the demands of Electric power supply such as those that arise in locations where conventional electric power supply systems using exclusively renewable energy sources have failed. The invention US 7469541 B1 relates to a remote and portable hybrid power system comprising one or more of the following components: a solar system, batteries, a backup generator, a wind power system and a communications system. The components are arranged on a platform that is portable and transportable to the remote location by a truck or other transport vehicle.

The invention US 0146751 A1 relates to a portable and self-sustaining power station that can be moved by land, air or sea to an area that does not have public services. The station is provided with arrays of solar panels in communication with at least one electrical distribution and storage media. Derived electricity is used to power several systems, including, but not limited to, a communications system, a water filtration system, a water distribution system to allow the public to extract drinking water and provide basic hygiene. Derived electricity can also be used to run external systems, such as schools, hospitals or the like. The arrays of solar panels are mounted on roller assemblies that can easily slide between a folded and unfolded condition. Solar panels include a plurality of solar panels that are supported by one or more hydraulic actuators to counteract the weight of the solar panel, whereby the solar panel can easily be placed in the desired inclined orientation.

The invention US 0176256 A1 relates to a mobile electricity generator comprising a telescopic boom, a first retractable support leg and a base. The telescopic arm comprises a first end and a second end. A wind turbine is attached to the second end of the telescopic boom and the wind turbine is capable of transforming wind into electricity. The first end of the telescopic boom and the first retractable support leg are attached to the base. The mobile electricity generator may also comprise a first solar panel that is capable of transforming light into electricity, the base can also comprise an external surface, and the first solar panel can be attached to the external surface of the base. The mobile electricity generator may further comprise a battery in electrical communication with the wind turbine and the first solar panel and the battery may be able to store at least temporarily the electricity.

The invention US 0300321 A1 relates to a power unit capable of being configured in a transport configuration and in an operational configuration. The unit comprises a container having first and second ends opposite a longitudinally extending central section. In the transport configuration, the central section of the container is generally placed parallel to a support floor surface. In the operational configuration, the container is configured to be placed with the first end on the support ground surface so that the second end separates in an upward direction from the support ground surface. The energy unit additionally comprises a wind turbine to generate electrical energy. In the operational configuration, the wind turbine is configured to be received within the interior space of the container, while in the transport configuration the wind turbine is configured to extend from the outer surface of the container.

The invention WO2017182691A1 provides an autonomous mobile electric power generation system comprising a renewable energy production subsystem, an electrical energy storage subsystem, an electrical energy distribution subsystem and an instrumentation and control subsystem.

OBJECT OF THE INVENTION

An object of the present invention is to provide a compact power station within a container, which supplies electricity, battery storage and network interconnection. Another object of the invention is to provide an energy station that includes a mechanism so that a plurality of solar panels disposed on the walls of the container can move towards the sun. Other objects, belonging to new and improved components and arrangements thereof, will be described in detail in the following description and in the accompanying drawings.

The detailed embodiments of the present invention are described herein, however, it should be understood that the described embodiments are merely exemplary of the invention, which can be incorporated in various forms. Therefore, the specific functional and structural details described herein should not be construed as limiting, but simply as a basis for the claims and as a basis for representation to teach a person skilled in the art to variously employ the present invention virtually in Any properly detailed structure.

BRIEF DESCRIPTION OF THE FIGURES

These and other objects of the present invention will be apparent from the following detailed description of a preferred embodiment, taken together with the accompanying drawings in which:

Figure 1 is a perspective view of an energy station incorporating the present invention and shows a top side perspective view showing the deployment of all the components that are inside the container.

Figure 2 shows a plan view of the container with the devices inside the container. Figure 3 is a perspective view incorporating the present invention partially in section and showing the closed container, the wind turbine support and total deployment of the photovoltaic cells. Figure 4 is a perspective view incorporating the present invention partially in section and showing the wind turbines on the container in storage configurations for full deployment of the components.

Figure 5 is a perspective view incorporating the present invention partially in section, showing the supports of said container (a) and the supports of the wind generators (b).

Figure 6 is a side perspective view that partially incorporates the present invention in section with lifting mechanisms of photovoltaic cells in the preferred version.

Figure 7 is a side perspective view that partially incorporates the present invention in section with lifting mechanisms of photovoltaic cells in the alternative version.

Figure 8 is the side perspective view of Figure 7 with the cell holder separated from the container wall.

Figure 9 is a view incorporating a section of the container with the lifting mechanism of the supports that hold the photovoltaic cells.

DESCRIPTION OF THE INVENTION

The present invention provides a container adapted as a power supply station and battery storage and interconnection to the network, characterized mainly by an adapted commercial container where the energy sources and other components have been strategically accommodated. Therefore, it is the objective of the present invention to overcome disadvantages of other containers, and to propose a container for electricity supply, which on the one hand presents wind use in wind turbines and sun use in photovoltaic cells, and that its assembly structure requires minimum structural resistive requirements, that its assembly is favored by having a certain degree of tolerance, and that allows a better use of the space of said container to provide greater installed power per square meter. In accordance with the foregoing, the present invention is mainly comprised of the following: An adapted container (1), a plurality of photovoltaic cells (2), a plurality of wind turbines (3), an energy generating plant (4), by fuel medium, a battery bank (5), a system for lifting (6) the plurality of photovoltaic cells and a system for cooling (7) of the batteries and a plurality of inverters (8), electronics and other means for generate, store and transfer electrical energy.

Referring now to Figures 1-4, in which the similar elements are consistently numbered throughout, Figure 1 illustrates an embodiment of the container (1) of the invention, preferably of the type used for goods transportation. in ships or railways, where said containers have a rectangular parallelepiped shape with metal walls adapted for movement. In which said transportable container is approximately 6 to 12 meters long, 2.5 meters wide and 2.6 meters high.

The most common material of the container of the invention is corrugated steel in a corrugated form, characteristic for its adhesion and robustness, although other materials are worked according to the inclemency that can be faced, such as aluminum or plywood, for which is also often used as an anticorrosive steel. As for the lining of the internal walls, these are covered with special anti-humidity materials, since this is the main threat to which electricity generation equipment with all its accessories is exposed.

On the one hand, in general, the present invention is advantageous by virtue of ensuring that the wind resistance is very large, which makes it necessary to oversize the structure of the container in order to provide it with the necessary resistance that supports not only the force of the wind, but also the turning moments that result from the asymmetries in the distribution of pressures, which also forces an oversize of the actuators to be able to control the positioning of the walls that support the photocells.

The arrangement of panels in elevated structures at different heights allows the impact of shadows cast by nearby structures to be reduced, which implies a greater uptake between solar cells.

Figure 1 shows a top side perspective view where (1) the deployment of all the components inside the container is shown, solar panels (2) are observed subject to movable structures, wind generators (3) in its position, (4) electric generator (4) with internal combustion engine in its location, location of the battery bank (5), the actuator arms (6) to move the structures that support the photovoltaic cells and fans (7) mounted on one of the walls of the container.

Figure 2 shows a plan view of the container with the control devices (8) that are inside the container, the actuator arms (6) holding the support structure of solar panels (2), the wind generators (3) in position, external fans (7) on the walls of the container, and (14, 15, 16) for the location of the batteries. Figure 3 shows the different accommodations of the container in configurations of storage to full deployment of the components. Figure (a) shows a side perspective view with the container (1) closed and the hidden elements, fans (7) on the wall. Figure (b) shows a section of the container with the supports (18) for wind turbines on beams (19) generally hidden under the top lid (20) of the container, where said beams (19) allow to withstand wind forces. Figure (c) shows the support structures (11) of the solar panels, oriented towards the outside of the container, which includes reinforced hinges or wedges (12) mounted on the walls that are embedded in the upper crossbars of the container for keep it together and in the desired position and moved by the actuator arms (6) that allow 180 ° rotation.

Figure 5 is a perspective view incorporating the present invention partially in section, showing the supports of said container (a) and the supports of the wind generators (b). In an embodiment of the invention, the supports of said container include a metal hearth in the form of "ele" (51) that involves holes (53) through which a concrete block (54) is screwed (52) that is generally buried. A view of the support (18) of the wind turbines is shown in Figure 5 (b), in a section that describes how the beam (19) is screwed (55), which is generally placed under the upper cover (20) of the container (1).

As can be seen through the various figures, said container (1) includes a plurality of assemblies to support a plurality of solar panels or photovoltaic cells.

In an embodiment of the present invention, said photovoltaic cells (2) are placed on fixed support structures on the sides of said container and are lifted by a system (6) that can include pistons (26) that are automatically operated with the Signal of an electronic sun follower system. Said photovoltaic cells (2) move between a transport position within said container, with means for selectively securing said solar panels in a storage position or in a position for generating solar energy when moved by said system to lift (6) the walls of the container and arranged in a way to maximize the surface of the cells exposed to the sun.

The operation is explained more simply in the following section of the document, where said photovoltaic cell support structures include means for their elevation that are the subject of the present invention. Referring now to Figures 6 to 9, in which similar elements are consistently numbered throughout, Figure 6 illustrates a preferred embodiment of the container lifting system (1) of the invention, wherein said actuator (6) is It shows by raising the support structure (21) of photovoltaic cells, at an angle greater than 45 degrees a bearing or hinge (12) as a rotating horizontal axis mechanical element, arranged in the upper part of the support structure (21) and allowing raising said support structure through the support point that has the articular joint (24) on the lateral sides of said wall and in the middle part of the actuator (6) there is provided a clamp (27) for fixing said limiting actuator of the displacement, however allowing a certain degree of tolerance in the axial direction.

The articular joint supports the upper part of said piston (26) by means of the pin (25) to said lateral wall in an intermediate part. Said piston (26) is attached to the front wall (42) of said container by means of the articular joint (28) and the pin (29) and the piston is actuated by a crank (32) that is rotated through a lever or sleeve (24) to drive the actuator (6) that is responsible for raising said support structure (21) of photovoltaic cells. Figures 7 to 9 illustrate an alternative embodiment of the container lifting system (1) of the invention, wherein said actuator (6) is shown by raising the support structure (21) of photovoltaic cells, at an angle greater than 45 degrees a bearing or special hinge (23) as rotating mechanical element of horizontal axis and with the possibility of separating from the upper part of said container, from means (22, 24 and 25) that allow said cell support to be folded to hide said photovoltaic cells. Unlike the previous single actuator through a crank, the alternative version includes a piston (36) that works with a hydraulic system (35).

In the container of the invention, in the preferred embodiment, a plurality of wind turbines (3) are placed on top of the walls of said container, at least 6 wind turbines are placed, four in each corner and two in the intermediate part of the upper part of the major side walls. The number and size of said wind turbines depends on the intended electricity supply capacity and mainly on the average wind speed, that is to say an alternative version can only consider a wind turbine placed next to said container

The present invention is particularly advantageous, since it includes a mechanism that allows wind turbines to be protected inside said container, when it is transported or in the case of wind speeds higher than those recommended by the mechanical resistance of the equipment.

Figure 4 shows the deployment and storage of wind generators which consists of figure (a) wind generators in their position where wind generators (3) arranged on the beam (19), in figure (b) are protected inside the container where the anchoring system (17) and pole travel (19) which shows its movement for internal protection. In an alternative embodiment of the container of the invention, the wind turbine (3) is reversibly expanded from a stowed position to a deployed position through a rigid tube. When fully stowed, the wind turbine and the tube are inside the container. When deployed, the tube extends through means in the top panel of the container and ensures stability. The base of the tube can be secured to the floor of the container. The wind turbine includes separable blades for easy storage when the unit is being transported inside the inner chamber of the container.

The wind turbine uses wind energy for immediate use or deposits it in an electric storage medium (battery), as is known in the art and does not need to be explained in detail. Currently there are various designs and types of wind turbines, these can be from one blade to multiple blades, horizontal or vertical. In the market there are two types of wind turbines, vertical axis wind turbines and horizontal axis wind turbines, each with their respective variants, (wind direction, number of blades, blade shape, among others.

To select the appropriate wind turbine for the container of the invention, it is necessary to perform a wind analysis of the area in question, this study will indicate the winds in the area and how much energy can be obtained from the area. For example, in the present invention, the Savonius type generator can be used, which is considered efficient in the sense that it can operate at low wind speeds, is silent and does not generate vibrations. The energy stored in the batteries can be used when there is little sunlight or wind. In addition, the station is provided with at least one generator / engine and an associated fuel tank for storing fuel (eg diesel) for peak or supplementary power when solar panels, wind turbines and electrical storage means are not sufficient.

In the present invention, a battery bank (6) is placed inside the container in three sections, with a similar number of batteries for each section. The generating system of the invention uses the plurality of photocells (2) to generate the energy required for recharging one of the battery banks and also for driving the wind turbines when the wind speed is insufficient. Wind turbines (3) are normally used for recharging another battery bank of the container of the invention.

In the present invention, the energy generating system (4) by means of an internal combustion engine can be operated based on natural gas, diesel, gasoline, alcohol, biodiesel or other types of fuel.

Said generator system (4) is used for recharging a third battery bank.

The battery banks (6) of the present invention are preferably made up of 10 kwh and 50 volt lithium ion batteries, preferably with approximate dimensions of 60 cm x 16 cm x 236 cm and weighing approximately 50 kg.

The placement of the batteries inside the container (1) must allow the passage of air currents from the cooling system and the interconnection must be carried out with elements that favor safety inside the container of the invention. The invention is particularly advantageous if the functionality of said container (1) is considered, as can be seen in Figure 3, where it is observed that the support structures of photovoltaic cells (1 1) can remain closed as indicated by 3-a, or move angularly as indicated in Figure 3-ca through a pivot (12) that allows a rotation of up to 180 ° to the photovoltaic cells. The sun tracking system of the present invention is of the conventional type and is about electronic and solar cell positioning mechanism on both sides of the container.

The foregoing makes the present invention particularly advantageous in achieving the capture of solar radiation in a suitable percentage throughout the day to deal with the first battery bank (14) through photocells. At night, wind turbines can continue to generate energy for recharging the second battery bank (15). The third battery bank (16) is preferably recharged with the generator (4) with internal combustion engine.

The device of the present invention has main utility for providing energy during peak hours of greatest demand, when the energy has a higher cost.

Said battery bank (16) can also be charged from the mains electricity in the hours of minimum demand.

The container adapted as a station for supplying electricity and storage in batteries and interconnection to the network, of the present invention may include elements that make it possible to generate from 100 kw to SOOkw, or add containers to generate from 500 kw to 2000 kw.

Although not shown in the aforementioned figures, all electrical connectors, cables, control systems, transformers, have been provided and need not be discussed further here in the idea of making the text simpler. Most of the components of the container of the invention have been obtained from commercial catalogs; consequently, such articles need not be described. The operation of the set, as already mentioned, has a series of concepts that are very easy to understand, despite its complexity. Obviously, it will be understood that the set is part of a prototype and, once accepted, must finally be designed by calculating finite elements (structure / fatigue / electrical / thermal ...) and, consequently, the final geometry, in instead of the function, it may undergo changes.

The steel of the components of the container of the invention is subject to the same treatment as the wind turbine towers and considering the size of the wind turbine towers, it is recommended to use concrete in the foundation to provide greater stability and rigidity. In this case, it has been made with precast concrete molds, with the clamping plates inserted or to integrate into the mold that are made with conventional prefabrication techniques.

All metal parts, once they have been forged, are subject to the corresponding paint scheme, after being dripped,

The present invention is particularly advantageous, since it can be used as an energy deposit, in all those processes where energy storage is required for subsequent reuse; both during peak hours and outside peak hours. It represents an increase in energy efficiency and the optimization of renewable resources, since it allows the use of power ranges below those currently required for food. The invention does not require special sites, water resources, large civil works or third processes and, therefore, is perfectly suitable for economies and locations of all types.

Claims

Having sufficiently described my invention, I consider as a novelty and therefore claim as my exclusive property, the content of the following clauses:

1- Container adapted as a station for supplying electricity and storage in batteries and interconnection to the network, characterized by containing means that can accommodate in a strategic way various energy generators and other components, secured for transfer and subsequent use through suitable accessory assemblies to support said generators during operation.

2.- The container adapted as an electricity supply station in accordance with clause 1, characterized in that said electricity supply container (1) can transport and support during operation: a plurality of photovoltaic cells (2), a plurality of wind turbines (3), a power generating plant (4), by means of fuel, a battery bank (5), a system for lifting (6) the plurality of photovoltaic cells and a system for cooling (7) of the batteries and a plurality of inverters (8), electronics and other means to generate, store and transfer electrical energy.

3.- The container adapted as an electricity supply station in accordance with the previous clauses, characterized in that said container has a rectangular parallelepiped shape with metal walls and structures adapted to have angular movement and support photovoltaic cells on them.

4.- The container adapted as an electricity supply station in accordance with the previous clauses, characterized in that said photovoltaic cells (2) are placed on movable support structures from the top of the sides of said container and are lifted by means of a system (6) of pistons that are automatically operated with the signal of an electronic sun-follower system, where said structures with photovoltaic cells (2) move angularly, with means for selectively securing said solar panels in a storage position or in a position for generating solar energy when moved by said system (6) and arranged in a way to maximize the surface of the cells exposed to the sun.

5.- The container adapted as an electricity supply station in accordance with the previous clauses, characterized by a lifting system of the container (1) of the invention, wherein said piston or actuator (26) is shown by raising the support structure (21 ) of photovoltaic cells, at an angle greater than 90 degrees, a bearing or hinge (23) as a rotating horizontal axis mechanical element, arranged at the top of said support structure (21) and which allows said support structure to be raised through of the support point that has the articular joint (24) on the lateral sides of said wall and in its middle part it has a clamp (27) for fixing said actuator limiting the displacement, nevertheless allowing a certain degree of tolerance in the axial direction .

6.- The container adapted as an electricity supply station in accordance with the previous clauses, characterized by supporting at least 6 wind turbines placed 4 in each corner and two in the upper part of the upper part of the major side walls .

7.- The container adapted as an electricity supply station in accordance with the previous clauses, characterized by supported wind turbines (18) on beams (19) generally hidden under the upper lid (20) of the container, where said beams (19) allow contain the forces of winds.

8.- The container adapted as an electricity supply station in accordance with the previous clauses, characterized by support structures (1 1) of the solar panels, oriented towards the outside of the container, which includes reinforced hinges or wedges (12) mounted on the walls that are embedded in the upper crossbars of the container to hold it together and in the desired position and moved by the actuator arms (6) that allow 180 ° rotation.

9.- The container adapted as an electricity supply station in accordance with the previous clauses, characterized by a lifting system of a support structure (21) of photovoltaic cells, which includes a bearing or hinge (12) as a rotating mechanical element of horizontal axis, arranged in the upper part of the support structure (21) and which allows said support structure to be raised through the support point that has the articular joint (24) on the lateral sides of said wall and in the middle part of the actuator (6) a clamp (27) for fixing said displacement limiting actuator is provided, nevertheless allowing a certain degree of tolerance in axial direction, said articular joint supports the upper part of said piston (26) by means of the pin (25) to said side wall in an intermediate part, said piston (26) is attached to the front wall (42) of said container by means of the articular joint (28) and the pin (29) and The piston is operated by a crank (32) that is rotated through a lever or sleeve (24) to drive the actuator (6) that is responsible for raising said support structure (21) of photovoltaic cells.