Flexible shielding protection device for photovoltaic module

Abstract

The utility model discloses a flexible shielding protection device for a photovoltaic module, and belongs to the field of photovoltaic technology. Comprising inhaul cables arranged on the two transverse sides of a photovoltaic module, fixed pulleys for guiding the inhaul cables to slide longitudinally, a roller shutter connected with the inhaul cables on the two sides and moving along with the inhaul cables, a roller shutter storage box arranged on the longitudinal lower side of the photovoltaic module and a winch box arranged on the longitudinal upper side of the photovoltaic module, and a winch connected with the inhaul cables is arranged in the winch box. A rolling shaft for rolling the roller shutter is arranged in the roller shutter storage box; the roller shutter has a rolling state and an unfolding state, during rolling, the winch releases force, the roller shutter is automatically rolled in the roller shutter storage box through the reel, and during unfolding, the winch pulls the inhaul cable, and the inhaul cable drives the roller shutter to unfold and cover the photovoltaic module. According to the utility model, the photovoltaic assembly can be conveniently and economically protected, risks under extreme conditions of strong wind, hail falling objects and the like can be reduced, and damages under environments of accumulated snow, raised dust and the like can also be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a protection technology for photovoltaic components. Background Art

[0002] Photovoltaic modules are placed in open air all year round for power generation. The crystalline silicon units in the modules are relatively fragile, so the surface of the crystalline silicon is covered with glass bonded by colloidal materials to protect the product safety of the photovoltaic modules. In recent years, with the saturation of the photovoltaic market in the high-latitude areas in the north, the photovoltaic market has tended to shift to the low-latitude areas in the south. Due to the influence of climate, the south is prone to strong convective weather, and frequent climate disasters such as strong winds, heavy rains, and hail occur. Glass that is in close contact with the crystalline silicon units can no longer provide corresponding protection. In extreme climate environments, photovoltaic modules are prone to bending and deformation, and surface glass is damaged, which can lead to hidden cracks in the power generation silicon crystals, reduce product reliability, bring irreversible damage, and cause property losses.

[0003] Photovoltaic modules are usually installed at a high position and are difficult to protect by manual covering. Existing photovoltaic shielding protection devices are difficult to promote in the market due to the complexity of the equipment, difficulty in installation or high cost, and even the fact that some products themselves block the power generation of photovoltaic modules.

[0004] Reference authorization announcement number CN 218734090 U Chinese utility model patent discloses a photovoltaic module with a protective structure, including: pulleys, provided with four groups, respectively installed on the left and right sides of the upper and lower ends of a mounting plate; a shielding block, located between two of the pulley groups, the side walls of the front and rear ends of the shielding block are fixedly connected with flexible connecting cloths, the left and right ends of the flexible connecting cloths are connected with traction ropes, the traction ropes and the pulleys are connected in a transmission connection, when it is necessary to protect the photovoltaic module, the pulley is rotated, the pulley drives the traction rope to move, and the traction rope moves synchronously with the flexible connecting cloth and the shielding block, and the flexible connecting cloth and the shielding block are moved to the upper end of the photovoltaic module through the pulley, so as to shield and protect the photovoltaic module, and when no protection is needed, the shielding block is located at the lower end of the mounting plate, which will not affect the power generation of the photovoltaic module, nor will it cause the photovoltaic module to be in high temperature. Although the patent claims that it will not cause the photovoltaic modules to be exposed to high temperatures, when the photovoltaic modules are generating electricity normally, the flexible connecting cloth and the shielding blocks move to the bottom side of the photovoltaic modules, forming an insulation layer on the bottom side of the photovoltaic modules. In areas with high temperatures and high light intensity, during the hot summer, the surface temperature of the modules is too high, and the back of the modules cannot effectively dissipate heat, posing a risk of combustion. Utility Model Content

[0005] In view of the defects existing in the prior art, the technical problem to be solved by the present invention is to provide a flexible shielding and protection device for photovoltaic components, so as to solve the problem of poor heat dissipation of photovoltaic components caused by installing the photovoltaic shielding and protection device in the prior art.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions: A flexible shielding protection device for a photovoltaic module, comprising guy wires arranged on the lateral sides of the photovoltaic module and fixed pulleys for guiding the longitudinal sliding of the guy wires, a rolling curtain connected to the guy wires on both sides and moving along with the guy wires, a rolling curtain storage box arranged on the longitudinal lower side of the photovoltaic module, and a winch box arranged on the longitudinal upper side of the photovoltaic module. A winch connected to the guy wires is arranged in the winch box, and a reel for winding the rolling curtain is arranged in the rolling curtain storage box; the rolling curtain has two states of winding and unfolding. When winding, the winch releases the force, and the rolling curtain is automatically wound into the rolling curtain storage box by the reel. When unfolding, the winch pulls the guy wires, and the rolling curtain is driven by the guy wires to unfold and cover above the photovoltaic module.

[0007] Preferably, pulley storage boxes extending longitudinally are correspondingly arranged on the lateral sides of the photovoltaic module, and a storage structure for realizing the storage of the fixed pulleys is installed in the pulley storage boxes.

[0008] Preferably, the storage structure comprises an electromagnet and a spring. When the electromagnet is energized, it drives the fixed pulley to retract and compress the spring. After the electromagnet loses power, the spring drives the fixed pulley to reset upward.

[0009] Preferably, a locking structure is arranged between the fixed pulley and the pulley storage box. When the fixed pulley retracts to a specified position, the locking structure automatically locks the fixed pulley.

[0010] Preferably, a longitudinal drainage groove is arranged in the pulley storage box.

[0011] Preferably, the reel is provided with a spring with a self - shrinking function or the reel is driven by a reel motor, so as to drive the reel to automatically wind the rolling curtain when the winch releases the force.

[0012] Preferably, a cleaning brush for cleaning the outer surface of the rolling curtain is arranged in the rolling curtain storage box.

[0013] Preferably, a water drainage hole is arranged at the bottom of the rolling curtain storage box.

[0014] Preferably, purlins are arranged below the longitudinal sides of the photovoltaic module, and the rolling curtain storage box and the winch box are respectively installed on the longitudinal lower purlin and the longitudinal upper purlin.

[0015] The technical solution adopted by the utility model has the following beneficial effects:

[0016] 1. Compared with the prior art, the rolling curtain has two states of winding and unfolding:

[0017] When unfolded, the winch starts to work, pulling the cable, driving the roller blind that was originally retracted in the roller blind storage box to cover the photovoltaic module from bottom to top, and gradually completely covering the photovoltaic module in this row. After covering, due to the support of the fixed pulleys on both sides, there is a certain overhead space between the roller blind and the photovoltaic module. The impact from the outside is borne by the roller blinds tightened on both sides, and the impact force is reduced through deformation and rebound buffering. At the same time, the force is dissipated through the vibration of the cable, and part of the force is transmitted to the fixed pulley, playing a role in protecting the photovoltaic module.

[0018] In the retracted state, since the roller blind does not need to move to the lower side of the photovoltaic module, the roller blind will neither block the surface of the photovoltaic module nor block the back of the photovoltaic module, solving the problem that the existing photovoltaic shielding protection device causes poor heat dissipation of the photovoltaic module.

[0019] Moreover, fixed pulleys for guiding the longitudinal sliding of the cable are provided on both lateral sides of the photovoltaic module, simultaneously forming support for the cable and the roller blind. In this way, there is no need to set up blocking blocks as in the prior art, simplifying the structure of the roller blind and reducing the strength requirements for the roller blind.

[0020] When retracting, the winch releases the force, and the roller blind is automatically retracted into the roller blind storage box by the reel. When unfolding, the winch pulls the cable, and the cable drives the roller blind to unfold and cover above the photovoltaic module. The cable follows the roller blind for retraction and unfolding. Compared with the prior art, the length of the cable can be shortened, reducing the cost.

[0021] Therefore, the flexible shielding protection device for photovoltaic modules of the present utility model can protect the photovoltaic modules conveniently and economically, reducing the risks under extreme conditions such as strong winds, hailstones, and high-altitude falling objects. And due to the product characteristics, it can also avoid damage in environments such as snow accumulation and dust. After being automatically or manually opened in specific scenarios such as at night, in rainy and snowy days, and under intense sunlight, it can effectively avoid surface dust accumulation, snow accumulation, or reduce the high temperature on the surface of the module.

[0022] Furthermore, for the photovoltaic module configured with this flexible shielding protection device, since the main shielding is borne by this device, the glass on the surface of the module can reduce the thickness or hardness requirements, thereby saving the total cost.

[0023] 2. Since pulley storage boxes extending longitudinally are provided correspondingly on the lateral sides of the photovoltaic module, and a storage structure for storing the fixed pulleys is installed inside the pulley storage boxes, during storage, the fixed pulleys are lowered by a certain height, and at the same time the cable also descends, so that the uppermost end of the cable is flush with the upper surface of the photovoltaic module, avoiding forming a shadow on the photovoltaic module and affecting the power generation efficiency. When unfolding, the fixed pulleys originally retracted in the pulley storage boxes rise, driving the cable stuck in the pulley grooves of the fixed pulleys to lift. The winch starts to work, pulling the cable, driving the rolling curtain originally retracted in the rolling curtain storage box to cover the photovoltaic module from bottom to top, and gradually completely covering the photovoltaic module. After covering, the cable and the rolling curtain are supported by the fixed pulleys on both sides, and the external impact is finally transmitted to the pulley storage box by the fixed pulleys, playing a role in protecting the photovoltaic module.

[0024] 3. When the electromagnet is energized, it drives the fixed pulley to retract and compress the spring. After the electromagnet loses power, the spring drives the fixed pulley to reset upward, facilitating the storage and rising of the fixed pulley.

[0025] Since a locking structure is provided between the fixed pulley and the pulley storage box, when the fixed pulley retracts to the designated position, the locking structure automatically locks the fixed pulley. In this way, when the photovoltaic module is generating electricity normally, the liftable fixed pulley is retracted to the bottom of the storage box and locked. When the electromagnet loses power, the spring drives the fixed pulley to reset upward, and the locking structure is unlocked.

[0026] 4. Since longitudinal drainage grooves are provided inside the pulley storage boxes, they can also serve as longitudinal drainage grooves, eliminating the need for a separate longitudinal drainage groove, serving two purposes with one object and reducing costs.

[0027] 5. The reel can be equipped with a spring with a self - contracting function, so that when the winch releases the force, it drives the reel to automatically wind up the rolling curtain without external power, and the winch does not need to do work, reducing energy consumption.

[0028] 6. The rolling curtain storage box and the winch box are respectively installed on the longitudinal lower purlin and the longitudinal upper purlin, and the installation of the flexible shielding protection device for the photovoltaic module is realized by means of the original structure of the photovoltaic system, which is convenient for installation and reduces the installation cost.

[0029] 7. The reel automatically winds up the rolling curtain in the rolling curtain storage box and passes through a cleaning brush. The cleaning brush can sweep away rainwater, dust, and snow on the outer surface of the rolling curtain and discharge them through the drain holes provided at the bottom of the rolling curtain storage box to avoid internal blockage.

[0030] 8. Light sensors and / or temperature sensors and / or pressure sensors are installed on the surface of the frame of the photovoltaic module to sense the external environment. When the outdoor environment affects the normal operation of the photovoltaic module, continuing to expose the photovoltaic module is meaningless and there is a risk of damage, and the automatic opening of the flexible shielding protection device can be controlled.

[0031] The specific technical solutions adopted by the present utility model and the beneficial effects brought thereby will be disclosed in detail in the following specific embodiments in combination with the accompanying drawings. Brief Description of the Drawings

[0032] The present utility model will be further described below in combination with the accompanying drawings and specific embodiments:

[0033] Figure 1 Isometric schematic diagram of the flexible shielding protection device for photovoltaic modules of the present utility model;

[0034] Figure 2 Top view of the flexible shielding protection device for photovoltaic modules of the present utility model;

[0035] Figure 3 Side view of the flexible shielding protection device for photovoltaic modules of the present utility model;

[0036] Figure 4 Schematic diagram of the connection structure between the fixed pulley and the pulley storage box;

[0037] Figure 5 Schematic diagram of the structure after the combination of the flexible shielding protection device for photovoltaic modules and the high-pressure air blowing device;

[0038] In the figure: reel 1, rolling curtain storage box 2, pulley storage box 3, mounting plate 31, electromagnet 32, spring 33, card slot 34, rolling curtain 4, cable 5, fixed pulley 6, pulley seat 61, limiting plate 62, guide rod 63, chuck 64, winch box 7, purlin 8, photovoltaic module 9, drain hole 10, winch 11, cleaning brush 12, high-pressure air blowing device 13. Specific Embodiments

[0039] The technical solutions of the embodiments of the present utility model will be explained and described below in combination with the accompanying drawings of the embodiments of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model and not all of them. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present utility model.

[0040] Those skilled in the art can understand that, without conflict, the features in the following embodiments and embodiments can be combined with each other.

[0041] The terms used in the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. For example, the terms indicating orientation or positional relationship such as "upper", "lower", "longitudinal", "transverse", etc. are only based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0042] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] Referring to the prior art, the photovoltaic modules are installed obliquely on the photovoltaic support. The photovoltaic modules can be set individually or arranged in a rectangular array, and the flexible shielding protection device for the photovoltaic modules involved in this embodiment can be set in both cases. Here, the inclined direction of the photovoltaic module is set as the longitudinal direction, and the direction perpendicular to the longitudinal direction is the transverse direction.

[0044] As Figures 1 to 3 shown, a flexible shielding protection device for a photovoltaic module includes cables 5 arranged on the transverse sides of the photovoltaic module 9, fixed pulleys 6 for guiding the longitudinal sliding of the cables 5, a rolling curtain 4 connected to the cables on both sides and moving with the cables, a rolling curtain storage box 2 arranged on the lower side of the longitudinal direction of the photovoltaic module, and a winch box 7 arranged on the upper side of the longitudinal direction of the photovoltaic module. A winch 11 connected to the cable is arranged in the winch box 7, and a reel 1 for winding the rolling curtain is arranged in the rolling curtain storage box 2. Among them, the rolling curtain 4 has two states: winding and unfolding. When winding, the winch 11 releases the force, and the rolling curtain 4 is automatically wound into the rolling curtain storage box 2 by the reel 1. When unfolding, the winch 11 pulls the cable 5, and the cable 5 drives the rolling curtain 4 to unfold and cover above the photovoltaic module 9.

[0045] Compared with the prior art, the rolling curtain has two states: winding and unfolding:

[0046] When unfolding, the winch starts to work, pulls the cable, drives the rolling curtain that was originally retracted in the rolling curtain storage box to cover above the photovoltaic module from bottom to top, and gradually completely covers the photovoltaic modules in this row. After covering, due to the support of the fixed pulleys on both sides, there is a certain overhead space between the rolling curtain and the photovoltaic module. The impact on the outside is borne by the rolling curtains tightened on both sides. The impact force is reduced through deformation and rebound buffering, and at the same time, the force is dissipated through the vibration of the cable and part of the force is conducted to the fixed pulley, playing a role in protecting the photovoltaic module.

[0047] In the retracted state, since the rolling curtain does not need to be moved to the lower side of the photovoltaic module, the rolling curtain will neither block the surface of the photovoltaic module nor block the back of the photovoltaic module, solving the problem that the existing photovoltaic shielding protection device causes poor heat dissipation of the photovoltaic module.

[0048] Moreover, fixed pulleys for guiding the longitudinal sliding of the cable are provided on both lateral sides of the photovoltaic module, simultaneously forming support for the cable and the rolling curtain. In this way, there is no need to set up a shielding block as in the prior art, simplifying the structure of the rolling curtain and reducing the strength requirement for the rolling curtain.

[0049] During retraction, the winch releases the force, and the rolling curtain is automatically retracted into the rolling curtain storage box by the reel. During deployment, the winch pulls the cable, and the cable drives the rolling curtain to unfold and cover above the photovoltaic module. The cable follows the rolling curtain for retraction and deployment. Compared with the prior art, the length of the cable can be shortened, reducing the cost.

[0050] Therefore, the flexible shielding protection device for the photovoltaic module of the present utility model can protect the photovoltaic module conveniently and economically, reduce the risks under extreme conditions such as strong winds, hailstones, and high-altitude falling objects, and also avoid damages in environments such as snow accumulation and dust. After being automatically or manually opened in specific scenarios such as at night, in rainy or snowy days, and under intense sunlight, it can effectively avoid surface dust accumulation, snow accumulation, or reduce the high temperature on the surface of the module.

[0051] Furthermore, for the photovoltaic module configured with this flexible shielding protection device, since the main shielding is borne by this device, the glass on the surface of the module can reduce the thickness or hardness requirements, thereby saving the total cost.

[0052] Furthermore, pulley storage boxes 3 extending longitudinally are correspondingly provided on both lateral sides of the photovoltaic module 9. A storage structure for realizing the storage of the fixed pulleys is installed in the pulley storage boxes 3. Here, the storage means that the fixed pulleys are lowered by a certain height, and at the same time, the cable is also lowered, so that the uppermost end of the cable is flush with the upper surface of the photovoltaic module, avoiding forming a shadow block on the photovoltaic module and affecting the power generation efficiency. In order to make the fixed pulleys and the cable lift and lower synchronously, the fixed pulleys are provided with pulley grooves, and a groove cover is arranged above to close the pulley grooves, so that the cable is always located in the pulley grooves. When the rolling curtain unfolds, the fixed pulleys originally retracted in the pulley storage boxes rise, driving the cable stuck in the pulley grooves of the fixed pulleys to lift. The winch starts to work, pulling the cable, driving the rolling curtain originally retracted in the rolling curtain storage box to cover the photovoltaic module from bottom to top, gradually completely covering the photovoltaic module. After covering, the cable and the rolling curtain are supported by the fixed pulleys on both sides, and the external impact is finally conducted by the fixed pulleys to the pulley storage boxes, playing a role in protecting the photovoltaic module.

[0053] Such as Figure 4As shown, as an implementation manner, the storage structure includes an electromagnet 32 and a spring 33. The fixed pulley 6 is rotatably installed on the pulley seat 61. The pulley seat is provided with a limiting plate 62. The upper part of the pulley storage box 3 is provided with a limiting opening. For example, the pulley storage box is a C-shaped steel, and the two sides of the opening are provided with inner flanges to form the limiting opening. The limiting plate 62 is located inside the pulley storage box, below the limiting opening, and is limited by the limiting opening. In addition, a guide rod 63 is connected to the lower side of the limiting plate. The pulley storage box is provided with a mounting plate 31 below the limiting plate. The mounting plate is provided with a guide hole. The guide rod 63 is matched with the guide hole. The spring 33 is installed on the guide rod 63, with the upper end abutting against the limiting plate and the lower end abutting against the mounting plate. The limiting plate is made of iron or a magnet and can be adsorbed after the electromagnet is energized. For example, an electromagnet is installed on the mounting plate. When the electromagnet is energized, it drives the fixed pulley to retract downward and compress the spring. After the electromagnet loses power, the spring drives the fixed pulley to reset upward. Whether it is retracting or resetting, the guide rod and the guide hole play a guiding role.

[0054] Furthermore, a locking structure is provided between the fixed pulley 6 and the pulley storage box 3. When the fixed pulley retracts to a specified position, the locking structure automatically locks the fixed pulley. In this way, when the photovoltaic module is generating electricity normally, the liftable fixed pulley is retracted into the storage box and locked. As an implementation manner, the locking structure is a clamping structure. For example, one of the bottom plate of the pulley storage box 3 and the bottom of the guide rod is provided with a clamping groove 34, and the other is provided with a clamping head 64. The clamping head can be deformed so as to be clamped into the clamping groove under the action of the electromagnet. After the electromagnet loses power, the spring drives the fixed pulley to reset upward, and the clamping head is disengaged from the clamping groove. As a deformation of the locking structure, a locking groove can be provided at the bottom of the guide rod, and a locking pin controlled by another electromagnet is provided on the bottom plate of the pulley storage box 3. In the state where the electromagnet loses power, the locking pin is clamped into the locking groove, and after being powered on, it drives the locking pin to disengage from the locking groove.

[0055] In addition, a longitudinal drainage groove is provided inside the pulley storage box 3. Taking the pulley storage box as a U-shaped steel as an example, a longitudinal drainage groove is formed on its inner side. Of course, at this time, the storage structure needs to avoid hindering the drainage of the longitudinal drainage groove. It can be understood that the pulley storage box can also be used as the snap-fixing track of the photovoltaic module, as long as the specifications of the pulley storage box and the spacing between the photovoltaic modules on both sides are controlled, and the cable and the liftable fixed pulley will have no interference with the photovoltaic module.

[0056] In order to realize the automatic winding of the reel, the reel 1 is provided with a spring with a self-retracting function or the reel is driven by a reel motor, so that when the hoist releases the force, it drives the reel to automatically wind the rolling curtain. Preferably, the reel is provided with a spring with a self-retracting function. In this way, when the hoist releases the force, it drives the reel to automatically wind the rolling curtain without external power, and the hoist does not need to do work, reducing the energy consumption.

[0057] Furthermore, a cleaning brush 12 for cleaning the outer surface of the rolling curtain 4 is provided inside the rolling curtain storage box 2. The cleaning brush 12 is arranged corresponding to the winding path of the rolling curtain, that is, the rolling curtain will pass through the position corresponding to the cleaning brush during winding. A water drainage hole 10 is provided at the bottom of the rolling curtain storage box 2. The reel automatically winds the rolling curtain into the rolling curtain storage box and passes through the cleaning brush. The cleaning brush can sweep away rainwater, dust, and snow on the outer surface of the rolling curtain and discharge them through the water drainage hole with a large aperture at the bottom of the rolling curtain storage box, avoiding internal blockage.

[0058] Referring to the prior art, purlins 8 are provided below the longitudinal sides of the photovoltaic module. The rolling curtain storage box 2 and the hoist box 7 are installed on the purlins 8, wherein the rolling curtain storage box 2 and the hoist box 7 are respectively installed on the lower longitudinal purlin and the upper longitudinal purlin. Thus, the installation of the flexible shielding protection device for the photovoltaic module is realized by means of the original structure of the photovoltaic system, which is convenient for installation and reduces the installation cost.

[0059] Furthermore, a light sensor and / or a temperature sensor and / or a pressure sensor are installed on the surface of the photovoltaic module frame. The light sensor senses the light intensity of the sun, the temperature sensor detects the surface temperature of the photovoltaic module, and the pressure sensor senses the snow accumulation and dust accumulation on the surface of the photovoltaic module. The above sensors and weather information are connected to the network information system. In addition, the flexible shielding protection device for the photovoltaic module is controlled by a control module, and the control module is also connected to the network information system. Combining with the network information system, it can receive the information fed back by the sensors and the weather information. When the network information system feeds back the following situations in the external environment, the control module controls the flexible shielding protection device for the photovoltaic module to start working:

[0060] 1. When the meteorological station warns that extreme weather such as strong wind, heavy snow, sandstorm, hail, etc. is expected to occur in the installation area of the photovoltaic module;

[0061] 2. When the light is insufficient to support the power generation of the photovoltaic module;

[0062] 3. When it is hot and sunny in summer, the surface temperature of the module is too high and there is a risk of combustion;

[0063] 4. When the pressure sensor detects that there is serious snow accumulation and dust accumulation on the surface of the module.

[0064] In the above situation, the open air environment has affected the normal operation of the photovoltaic modules. It is meaningless to continue to expose the photovoltaic modules, and there is a risk of damage. The control module controls the flexible shielding protection device to open automatically, and the fixed pulley originally retracted in the pulley storage box rises, and drives the cable stuck in the fixed pulley groove to lift. The winch starts to work, pulls the cable, and drives the roller shutter originally retracted in the roller shutter storage box to cover the photovoltaic modules from bottom to top, gradually covering the photovoltaic modules in this row. After covering, due to the support of the fixed pulleys on both sides, there is a certain overhead space between the roller shutter and the photovoltaic modules. The impact on the outside is borne by the tensioned roller shutters on both sides, which reduce the impact force through deformation and rebound buffering, and release the force through the vibration of the cable, and at the same time transmit part of the force to the fixed pulley, and then transmit it to the pulley storage box by the fixed pulley, which plays a role in protecting the photovoltaic modules.

[0065] In this embodiment, the components involved in the photovoltaic module flexible shielding protection device are all common equipment on the market. Among them, the flexible roller blind as a shielding component can be composed of materials such as fabric, rubber, and thin steel plate. The material is light, the degree of integration is high, the construction is convenient, and the cost is low. When there are multiple columns of components, a winch can be used with a widened fabric to cover multiple columns of components at the same time, which further reduces the cost. The cable can be made of steel wire rope.

[0066] When the external environment is suitable, the control module automatically works to retract the cable and fixed pulley and lower the roller blind. This process can also be used to clear the snow on the roller blind to prevent the snow from falling and injuring people.

[0067] Since the photovoltaic modules are automatically covered in low-light scenes such as at night and in sandstorms, dust, bird droppings and other dirt can be reduced from landing directly on the surface of the photovoltaic modules during the covering period, and the system can clean them with its own cleaning brush, so the module cleaning cycle can be extended and maintenance costs can be reduced.

[0068] Of course, when necessary, the flexible shielding protection system can also be manually controlled to meet maintenance and inspection requirements.

[0069] Double or even multiple layers of flexible roller blinds can also be arranged on the cables to provide better protection.

[0070] Embodiment 2

[0071] like Figure 5 As shown, on the basis of the first embodiment, a high-pressure airflow purge device 13 is installed above the photovoltaic module. For example, a row of high-pressure gas nozzles are arranged horizontally on the longitudinal upper side of the photovoltaic module to blow high-pressure gas toward the surface of the photovoltaic module. The high-pressure gas channel can be controlled by the roller curtain covering the photovoltaic module to maintain the high-pressure gas pressure and improve the efficiency of high-pressure gas dust blowing. Therefore, the photovoltaic module flexible shielding protection device of the utility model combined with the high-pressure airflow purge device can conveniently remove surface dust, reduce the number and difficulty of cleaning, and reduce operation and maintenance costs.

[0072] In addition, an air pipe can be horizontally laid along the upper end of the rolling curtain. The air pipe is externally connected to an air source through a joint and a pipeline, and air holes are opened on the air pipe. In this way, during the contraction process of the rolling curtain, high-pressure gas is blown onto the surface of the photovoltaic module to synchronously purge the surface of the photovoltaic module. Of course, the air pipe is located between the two cables.

[0073] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A flexible shielding and protection device for photovoltaic modules, characterized in that: It includes cables arranged on both sides of the photovoltaic component in the horizontal direction and fixed pulleys guiding the cables to slide longitudinally, a roller blind connected to the cables on both sides and moving with the cables, a roller blind storage box arranged on the lower side of the photovoltaic component in the longitudinal direction, and a winch box arranged on the upper side of the photovoltaic component in the longitudinal direction. A winch connected to the cables is arranged in the winch box, and a reel for rolling up the roller blind is arranged in the roller blind storage box. The roller blind has two states: rolling up and unfolding. When rolling up, the winch releases force, and the reel automatically rolls up the roller blind in the roller blind storage box. When unfolding, the winch pulls the cables, and the cables drive the roller blind to unfold and cover the photovoltaic component.

2. A photovoltaic module flexible shielding protection device according to claim 1, characterized in that: Pulley storage boxes extending in the longitudinal direction are correspondingly provided on both lateral sides of the photovoltaic assembly, and a storage structure for storing a fixed pulley is installed in the pulley storage box.

3. A photovoltaic module flexible shielding protection device according to claim 2, characterized in that: The storage structure includes an electromagnet and a spring. When the electromagnet is energized, it drives the fixed pulley to recover and compress the spring. After the electromagnet loses power, the spring drives the fixed pulley to return upward.

4. A photovoltaic module flexible shielding protection device according to claim 2, characterized in that: A locking structure is provided between the fixed pulley and the pulley storage box. When the fixed pulley is recovered to a specified position, the locking structure automatically locks the fixed pulley.

5. A photovoltaic module flexible shielding protection device according to claim 2, characterized in that: A longitudinal drainage groove is provided in the pulley storage box.

6. A photovoltaic module flexible shielding protection device according to claim 1, characterized in that: The reel has a spring with a self-contraction function or the reel is driven by a reel motor, so that when the winch loses power, the reel is driven to automatically reel in the rolling curtain.

7. A photovoltaic module flexible shielding protection device according to claim 1, characterized in that: A cleaning brush for cleaning the outer surface of the rolling blind is arranged in the rolling blind storage box.

8. A photovoltaic module flexible shielding protection device according to claim 7, characterized in that: A drainage hole is provided at the bottom of the rolling curtain storage box.

9. A photovoltaic assembly flexible shielding protection device according to claim 1, characterized in that: Purlins are arranged below the longitudinal sides of the photovoltaic assembly, and the rolling shutter storage box and the hoist box are respectively installed on the longitudinal lower purlin and the longitudinal upper purlin.

10. A photovoltaic module flexible shielding protection device according to claim 1, characterized in that: A light sensor and / or a temperature sensor and / or a pressure sensor is installed on the surface of the photovoltaic component frame.

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