Fence lifting method and photovoltaic construction safety liftable fence

Abstract

The invention discloses a fence lifting method and a safe liftable fence for photovoltaic construction, and the fence lifting method comprises the following steps: mounting and fixing: a fixed beam is fixedly mounted on one side of a photovoltaic module of a roof; after installation and fixation, after a constructor enters a maintenance area of the photovoltaic module, the driving assembly drives the movable beam to move upwards to the position above the fixed beam so as to protect the constructor; and storage: after the photovoltaic module is unfolded for use, when a constructor leaves the maintenance area of the photovoltaic module, the driving assembly drives the moving beam to move downwards and is stored in the fixed beam, so that the shielding of the photovoltaic module is reduced. Through the three processes of installation and fixation, unfolding and use and storage, the fence is lifted for protection when people enter and stored for avoiding when people leave, high-place operation safety and low shielding of photovoltaic modules are considered, protection reliability and power generation efficiency are improved, and the fence is suitable for various roof photovoltaic projects and has both safety and economical efficiency.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic construction safety protection equipment technology, and in particular to a fence lifting method, and a photovoltaic construction safety liftable fence that performs the fence lifting method. Background Technology

[0002] With the acceleration of the global energy transition, solar photovoltaic power generation has become an indispensable part of the energy structure due to its advantages of being clean, renewable, and widely distributed. Among them, rooftop photovoltaic systems have been widely promoted and applied in residential and commercial distributed photovoltaic fields because they can effectively utilize idle roof space and achieve local power consumption. The construction and operation and maintenance of rooftop photovoltaic systems usually involve working at heights. Construction and maintenance personnel face multiple safety risks such as falls, slips, or collisions with equipment when working on roof edges, gaps between photovoltaic arrays, or sloping roof surfaces. Therefore, setting up reliable protective fences in the work area is a basic prerequisite for ensuring personnel safety and an important part of on-site safety management.

[0003] Currently, protective fencing for rooftop photovoltaic (PV) construction mainly follows two traditional solutions: The first is fixed metal fencing, often using steel pipes, aluminum alloy profiles, or reinforced concrete structures. These fencings are characterized by high strength, good stability, and long-term resistance to wind and rain erosion. They are typically poured directly into the roof or bolted to the perimeter of the PV modules during the roof construction phase. However, the height of this type of fencing is fixed after the design is completed and cannot be adjusted according to the work stage or the range of personnel activity. This not only creates large-area long-term shading between PV arrays, reducing system power generation efficiency, but may also cause hot spot effects on the modules due to insufficient local sunlight, accelerating module aging. Furthermore, fixed fencing requires integrated construction with the roof structure, resulting in long installation cycles, high modification costs, and poor adaptability to different roof shapes and PV layouts. The second type is temporary assembled fencing, commonly made of plastic or lightweight metal mesh. It has the advantages of being lightweight and easy to assemble and disassemble, allowing for rapid on-site deployment to meet short-term construction needs. However, the structural strength of this type of fence is limited, and it is prone to tipping over or breaking under the action of external forces such as strong winds, collisions or people leaning on it, making it difficult to provide continuous and reliable protection. At the same time, its height is also fixed, which cannot take into account both the effectiveness of protection and the light-receiving requirements of photovoltaic modules. Furthermore, during frequent disassembly and assembly, problems such as loosening of connectors and increased gaps in protection are likely to occur, further weakening the tightness of safety protection.

[0004] Therefore, developing a fence lifting method and supporting equipment that can automatically or manually switch between lifting and lowering based on the entry and exit status of construction personnel, and maintain reliable protection and low obstruction characteristics in all states, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a fence lifting method, which achieves the fence rising for protection when personnel enter and retracting to avoid obstruction when leaving through a three-step process of installation, deployment, and storage. This balances the safety of working at heights with low shading of photovoltaic modules. In addition, by combining transmission, locking, detection, and mesh design, it can be switched automatically or manually, improving the reliability of protection and power generation efficiency. It is suitable for various rooftop photovoltaic projects, combining safety and economy.

[0006] The present invention also proposes a photovoltaic construction safety liftable fence that implements the above-described fence lifting method.

[0007] The fence raising and lowering method according to the present invention includes the following steps: Installation and fixing: The fixing beam is fixedly installed on one side of the photovoltaic modules on the roof; Usage: After installation and fixing, when construction personnel enter the maintenance area of ​​the photovoltaic module, the drive module will move the movable beam upwards to above the fixed beam to protect the construction personnel. Storage: After being deployed and used, when the construction personnel leave the maintenance area of ​​the photovoltaic module, the drive component drives the moving beam to move downward and be stored in the fixed beam to reduce shading of the photovoltaic module.

[0008] The fence lifting method according to the present invention has at least the following beneficial effects: It constructs a complete and cyclically executable protection and avoidance control process, realizing dynamic management of the fence status during photovoltaic construction and maintenance, and has significant advantages in safety, economy, and on-site adaptability. Firstly, in the installation and fixing stage, the fixed beam is securely installed on one side of the photovoltaic modules on the roof, providing a reliable installation base and structural support for the entire fence system. This ensures that the fence has sufficient wind resistance, vibration resistance, and anti-displacement capabilities in high-altitude working environments such as rooftops, avoiding protection failure or equipment damage due to unstable foundations, thus laying a solid foundation for subsequent lifting actions. Subsequently, in the deployment and use stage, when construction personnel enter the maintenance area of ​​the photovoltaic modules, the drive component immediately responds and drives the moving beam upwards to above the fixed beam, allowing the fence to quickly form a continuous and complete physical isolation barrier. This barrier can effectively prevent construction personnel from approaching the roof edge, unprotected danger zones, or gaps between photovoltaic arrays, preventing accidents such as falls, slippage, and accidental entry into live equipment. Furthermore, since the upward movement of the moving beam is executed immediately after personnel enter, it achieves timely and proactive protection, significantly improving the protection at high altitudes. The system prioritizes inherent safety during operation. Finally, during the storage phase, when workers leave the maintenance area, the drive components reverse, causing the moving beam to move downwards and be stored within or close to the fixed beam. This minimizes the overall height of the fence, reducing the shading area on the photovoltaic modules and preventing power generation efficiency degradation, uneven local illumination, and hot spot effects caused by long-term or frequent shading. This helps maintain the continuous, efficient operation and lifespan of the photovoltaic system. Overall, it forms an intelligent safety logic of "protection when people are present, avoidance when no one is present." This overcomes the drawbacks of traditional fixed fences sacrificing power generation efficiency due to their non-adjustable height, and also compensates for the untimely and unreliable protection of temporary fences. The process is clear and the steps are well-defined, facilitating understanding and execution by on-site personnel. It can flexibly combine automatic control or manual operation to adapt to different management models and site conditions. While ensuring the safety of construction personnel throughout the process, it maximizes the usable light-receiving area and power generation revenue of the photovoltaic modules, achieving synergistic optimization of safety protection and economic benefits. It is particularly suitable for rooftop photovoltaic projects with high requirements for refined safety management and power generation efficiency, demonstrating outstanding practical value and promising prospects for promotion.

[0009] According to some embodiments of the fence lifting method of the present invention, one end of the transmission beam is rotatably connected to the fixed beam, and the other end is rotatably connected to the movable beam; When unfolded for use and stored, the drive component is used to drive the transmission beam to rotate by a preset angle, thereby causing the moving beam to rise and fall by a preset displacement.

[0010] According to some embodiments of the fence lifting method of the present invention, when the fence is unfolded for use, the transmission beam is in a vertical state; when it is stored, the transmission beam is in a horizontal state.

[0011] According to some embodiments of the fence lifting method of the present invention, a locking mechanism is provided between the moving beam and the transmission beam; When deployed, the locking mechanism keeps the moving beam and the transmission beam in their current positions.

[0012] According to some embodiments of the fence lifting method of the present invention, the driving component includes a drive motor, and the locking mechanism includes an electromagnet; When in use, the drive motor rotates in the first direction, causing the transmission beam and the moving beam to move upward together into position. Then, the electromagnet is de-energized to lock the transmission beam and the moving beam. When stored and used, after the electromagnet is energized to unlock the transmission beam and the moving beam, the drive motor rotates in a direction away from the first direction, causing the transmission beam and the moving beam to move down into place together.

[0013] According to some embodiments of the fence lifting method of the present invention, the entrance and exit of the roof are provided with detection sensors; the fence lifting method further includes the following steps: Automatic switching: After installation and fixation, the detection sensor is used to detect the entry of construction personnel to run the unfolding and use steps, and / or to detect the exit of construction personnel to run the storage and retrieval steps.

[0014] According to some embodiments of the fence lifting method described in this invention, the fence lifting method further includes the following steps: Manual switching: After installation and fixing, and after the construction personnel leave the roof, use the manual switch to run the storage step.

[0015] According to some embodiments of the fence lifting method described in this invention, multiple nylon ropes are provided between the fixed beam and the movable beam; When deployed, the nylon rope can be extended vertically to protect construction workers.

[0016] The photovoltaic construction safety liftable fence according to the present invention implements the fence lifting method of the present invention; the photovoltaic construction safety liftable fence includes: Fixed beams are fixedly installed on the roof. Moving beam; A transmission beam, one end of which is rotatably connected to the fixed beam and the other end of which is rotatably connected to the movable beam; A drive assembly is used to drive the transmission beam to rotate by a preset angle, so as to drive the moving beam to rise and fall by a preset displacement.

[0017] The photovoltaic construction safety liftable fence according to the present invention has at least the following beneficial effects: the fence can not only provide physical isolation in actual construction, but also automatically or manually switch states according to personnel entry and exit or manual commands, taking into account safety, intelligence and photovoltaic module power generation efficiency. It is particularly suitable for rooftop photovoltaic projects with high requirements for timely protection and continuous power generation, and has good on-site adaptability and promotion value.

[0018] According to the photovoltaic construction safety liftable fence of the present invention, the photovoltaic construction safety liftable fence further includes an electromagnet, a pin and a slot, the electromagnet and the pin are disposed on the movable beam, the slot is disposed on the transmission beam, and the electromagnet can drive the pin to insert into or disengage from the slot.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram illustrating the movement state of a photovoltaic construction safety liftable fence according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a photovoltaic construction safety liftable fence in its retracted state, according to an embodiment of the present invention. Figure 3 This is a schematic diagram of a photovoltaic construction safety liftable fence in use, according to an embodiment of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of a photovoltaic construction safety liftable fence in use, according to an embodiment of the present invention. Figure 2 ; Figure 5 This is a flowchart illustrating a method for raising and lowering a photovoltaic construction safety liftable fence, applicable to an embodiment of the present invention.

[0021] Explanation of icon numbers: Fixed beam 100; Transmission mechanism 200; drive assembly 210; rotating shaft 211; transmission beam 220; 300 moving beams; Locking mechanism 400; electromagnet 410; pin 420; slot 430. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0024] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0025] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0026] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] Therefore, such as Figures 1 to 4As shown, this invention proposes a photovoltaic construction safety liftable fence, which includes a fixed beam 100, a transmission mechanism 200, and a movable beam 300. One end of the transmission mechanism 200 is connected to the fixed beam 100, and the movable beam 300 is connected to the other end of the transmission mechanism 200. Driven by the transmission mechanism 200, the movable beam 300 can move upward above the fixed beam 100 to protect construction personnel; or, the movable beam 300 can move downward to be stored in the fixed beam 100. It should be noted that through the coordinated operation of the fixed beam 100, the transmission mechanism 200, and the movable beam 300, the height of the fence is adjustable in both construction and non-construction states. This ensures the safety of construction workers while minimizing adverse effects on the photovoltaic modules. The fixed beam 100, as a stable mounting base, provides a reliable support foundation for the entire fence, ensuring that the structure is not prone to swaying or instability in high-altitude environments such as rooftops. Furthermore, the transmission mechanism 200, connected at one end to the fixed beam 100 and at the other to the movable beam 300, converts driving power into the lifting and lowering displacement of the movable beam 300. During construction, the movable beam 300 can move upwards under the drive of the transmission mechanism 200 to above the fixed beam 100, forming a continuous physical barrier that effectively prevents construction workers or unauthorized personnel from entering the danger zone, preventing falls from heights and other construction safety accidents. In addition, since the rising position and posture of the movable beam 300 are precisely controlled by the transmission mechanism 200, it can be adjusted for different roof structures and... The photovoltaic array layout forms a protective range that fits the site requirements, significantly improving the targeting and reliability of the protection. In addition, during non-construction periods, the transmission mechanism 200 can reverse the direction to move the moving beam 300 downwards, allowing it to be housed within or close to the fixed beam 100. At this time, the vertical space occupied by the fence is greatly reduced, and it will hardly obstruct the photovoltaic modules. This avoids problems such as reduced power generation efficiency, uneven local illumination, and hot spots on the modules caused by long-term or frequent shading by the fence, ensuring the continuous and efficient operation and service life of the photovoltaic system. By organically integrating the protective function and the space avoidance function, it overcomes the photovoltaic efficiency loss caused by the non-adjustable height of traditional fixed fences and makes up for the safety hazards of insufficient protection capabilities of temporary fences. It achieves a dual improvement in safety and economy. Moreover, the overall structural logic is clear and the transmission path is direct, which helps to simplify the installation and commissioning process, reduce maintenance difficulty, and can be flexibly adapted to rooftop photovoltaic projects of different scales and forms, with significant practical value and promotion prospects.

[0028] Specifically, refer to Figure 1The transmission mechanism 200 includes a drive assembly 210 and transmission beams 220. Multiple transmission beams 220 are arranged at intervals along the length of the fixed beam 100. One end of each transmission beam 220 is rotatably connected to the fixed beam 100, and the other end is rotatably connected to the moving beam 300. The drive assembly 210 drives the transmission beams 220 to rotate by a preset angle, thereby causing the moving beam 300 to rise or fall by a preset displacement. The structure employing multiple transmission beams 220 arranged at intervals evenly distributes the weight of the moving beam 300 and the load during the lifting process across different positions of the fixed beam 100, effectively preventing structural deformation or damage caused by excessive stress at a single point, thus significantly improving the overall load-bearing stability and durability of the fence. Furthermore, the rotational connection of the transmission beam 220 directly converts the rotational power of the drive component 210 into the vertical lifting displacement of the moving beam 300. The transmission path is simple and the energy loss is small, making the lifting action more stable and controllable. In addition, the coordinated work of multiple transmission beams 220 can ensure that the moving beam 300 maintains a consistent displacement along the length of the fixed beam 100 during the lifting process, preventing the moving beam 300 from tilting or getting stuck due to differences in the rotation angle of local transmission beams 220. This ensures that the protective barrier is continuous and intact when raised and neat and compact when stored, thus better adapting to different roof spans and photovoltaic array arrangements, improving the versatility of the fence and the flexibility of on-site layout, and meeting the diverse needs for protection range and height in photovoltaic construction. Furthermore, a rotating shaft 211 is provided at the connection between the transmission beam 220 and the fixed beam 100. The drive assembly 210 includes a drive motor, which drives the rotating shaft 211 and the transmission beam 220 to rotate together. This makes the rotating pair structure between the transmission beam 220 and the fixed beam 100 clearer, reduces frictional resistance and wear at the connection point, and improves transmission accuracy and long-term reliability. Understandably, the introduction of the drive motor gives the lifting process automated and programmable control characteristics. The rotation angle of the rotating shaft 211 can be controlled by precisely adjusting the motor speed and direction, thereby achieving precise positioning of the lifting height of the moving beam 300. This avoids uneven force or positional deviations that may occur during manual operation. Moreover, the linkage design between the drive motor and the rotating shaft 211 shortens the power transmission chain, reduces transmission lag, and makes the movement of the moving beam 300 smooth and continuous during startup, operation, and shutdown, reducing the damage to the structure caused by impact loads.

[0029] Refer to Figure 2 and Figure 3In some embodiments of the present invention, the drive component 210 is used to drive the transmission beam 220 to switch between a horizontal state and a vertical state. When the transmission beam 220 is in a horizontal state, the moving beam 300 descends to be close to or housed within the fixed beam 100, minimizing the overall height of the fence and causing almost no obstruction to the photovoltaic modules, thus ensuring power generation efficiency and module safety during non-operational periods. When the transmission beam 220 switches to a vertical state, the accumulated rotation angle raises the moving beam 300 above the fixed beam 100, forming a continuous high-level protective surface, effectively preventing construction personnel or objects from crossing the fence into the danger zone. This dual-state switching mechanism realizes the on-demand switching of the fence's "protection-avoidance" function, fundamentally solving the problem of traditional fixed-height fences obstructing photovoltaic modules for extended periods. Simultaneously, the state boundaries are clearly defined, allowing operators to intuitively judge the fence's operating condition and reducing the probability of misoperation. Furthermore, the switching between horizontal and vertical states is accomplished by the same drive component 210, which is compact in structure and easy to control, facilitating rapid deployment and dismantling on site, and improving construction efficiency and on-site management convenience.

[0030] Refer to Figure 3 and Figure 4In some embodiments of the present invention, a locking mechanism 400 is provided between the moving beam 300 and the transmission beam 220 to keep the moving beam 300 and the transmission beam 220 in their current positions. That is, the locking mechanism 400 stabilizes the moving beam 300 and the transmission beam 220 at their current height during construction, or stabilizes the moving beam and the transmission beam in their storage position (not shown in the figure) after construction is completed. This can prevent the barrier from falling or shifting due to wind, vibration, collision, or accidental loss of force of the drive component 210, ensuring that the protective barrier remains effective throughout the entire operation cycle. Specifically, for scenarios requiring sustained operation under a particular condition, such as high-altitude installation or maintenance work lasting several hours, the locking mechanism 400 can release the continuous load on the drive component 210, reducing energy consumption and mechanical wear, and extending equipment life. Simultaneously, this locking action prevents gaps from forming between the moving beam 300 and the transmission beam 220 due to positional slippage, maintaining the overall enclosure and continuity of the fence, thereby improving the tightness and reliability of construction safety protection. It is particularly suitable for use in windy or uneven rooftop environments, ensuring that construction personnel are always reliably protected. Specifically, the locking mechanism 400 can keep the transmission beam 220 in a vertical position. Understandably, when the transmission beam 220 is in a vertical position, the moving beam 300 has been raised to its highest protective position. At this time, the locking mechanism 400's fixation of the transmission beam 220 directly ensures the height and posture stability of the moving beam 300, effectively resisting changes in the angle of the transmission beam 220 caused by gravity swing, wind propulsion, or construction disturbances, preventing accidental descent of the moving beam 300 and resulting in protective failure. Furthermore, the vertical locking mechanism creates a stable spatial support structure between the transmission beam 220, the fixed beam 100, and the moving beam 300, enhancing overall rigidity and resistance to tilting. This ensures the flatness and continuity of the protective surface even under strong winds or external impacts. By locking at the transmission beam 220 level, the position of the moving beam 300 is ensured to remain unchanged from the source of power transmission. Even if the moving beam 300 is subjected to lateral forces, the stability of the transmission beam 220 limits its displacement, further improving the safety redundancy and protective continuity of the fence under complex working conditions, providing a more robust guarantee for operations at height.

[0031] In some embodiments of the present invention, such as Figures 1 to 3As shown, the locking mechanism 400 includes an electromagnet 410, a pin 420, and a slot 430. The electromagnet 410 and pin 420 are disposed on the moving beam 300, and the slot 430 is disposed on the transmission beam 220. When the transmission beam 220 is in a vertical state, the electromagnet 410 can drive the pin 420 to move outward to insert into the slot 430 and lock the transmission beam 220. The electromagnet 410's electrical control characteristics allow the locking and unlocking actions to be seamlessly integrated with the control system, achieving automated response. For example, the pin 420 is triggered to extend and complete the locking the instant the moving beam 300 reaches the vertical position or 2 seconds later, without manual intervention, improving operational efficiency and reliability. In this regard, the mechanical engagement of the pin 420 and the slot 430 provides a strong holding force, ensuring that the transmission beam 220 does not experience any angular displacement in the vertical state, and can stably maintain the protective height of the moving beam 300 even in strong winds or human impact. By integrating the electromagnet 410 and the pin 420 into the moving beam 300 and placing the slot 430 on the transmission beam 220, the locking component rises and falls synchronously with the moving beam 300. This avoids the need for a separate, complex locking structure on the fixed beam 100, simplifying the overall construction. Furthermore, the insertion of the pin 420 into the slot 430 is accompanied by a clear sense of arrival or signal feedback, facilitating confirmation of successful locking by operators or the system. This further enhances safety and controllability, ensuring that the protective state is not accidentally released under any operating condition. Optionally, refer to... Figure 3 and Figure 4 When the electromagnet 410 is de-energized, the pin 420 moves downwards and inserts into the slot 430. When the electromagnet 410 is energized, the solenoid valve magnetically attracts the pin 420 and drives it upwards to disengage from the slot 430. Utilizing a reset element after the electromagnet 410 is de-energized, such as a spring or gravity, the pin 420 automatically inserts into the slot 430, forming a power-off self-locking function. This ensures that in the event of a sudden power outage, control system failure, or other electrical anomalies, the transmission beam 220 remains vertical, and the moving beam 300 continues to provide protection, offering uninterrupted safety for construction personnel. Furthermore, the power-off self-locking feature significantly reduces reliance on continuous power supply, improving the reliability and safety of the equipment in field or temporary power environments. It ensures the locking function remains effective in emergencies, further enhancing the safety redundancy and robustness of the fence under unpredictable conditions, ensuring reliable maintenance of safety protection under any power condition.

[0032] In some embodiments of the present invention, a partition net (not shown in the figure) is provided between the fixed beam 100 and the movable beam 300. When the movable beam 300 can move upward above the fixed beam 100, the partition net can be vertically unfolded to protect construction personnel. In this way, the partition net fills any gaps that may form between the fixed beam 100 and the movable beam 300, creating a continuous, blind-spot-free protective surface, effectively preventing small tools or personnel body parts from accidentally crossing, and improving the overall tightness of the protection. For example, the partition net is made of a flexible material, which can naturally unfold or retract with the rise and fall of the movable beam 300. When unfolded, it forms a vertical protective curtain; when retracted, it folds tightly against the beam, without occupying additional space or hindering the low-obstruction characteristics of the fence in non-operational states. Furthermore, the partition net material can be selected from wear-resistant, weather-resistant, and UV-resistant synthetic fibers, which are not prone to aging and damage over long-term use, reducing maintenance frequency and costs. Furthermore, the flexible mesh can absorb some energy when impacted, reducing the direct force on the main body of the fence, thereby improving the overall structure's durability and safety under harsh conditions and providing more comprehensive protection for photovoltaic construction. Optionally, the mesh includes multiple nylon ropes, which are spaced apart along the length of the fixed beam 100. One end of each nylon rope is fixedly connected to the fixed beam 100, and the other end is fixedly connected to the movable beam 300. This spaced arrangement of nylon ropes ensures vertical protection continuity while effectively reducing wind resistance and weight, preventing entanglement, tearing, or overall instability due to excessive force in strong winds, thus improving the wind resistance of the mesh and fence. Moreover, the flexibility of the nylon ropes allows them to smoothly extend or retract with the movement of the movable beam 300, forming a uniform vertical protective curtain when extended and neatly fitting the beam when retracted, without interfering with the fence's raising and lowering movements. The fixed ends ensure that the mesh moves synchronously with the main fence body, preventing protective gaps caused by mesh lag or displacement. In addition, nylon rope itself has excellent wear resistance, weather resistance, corrosion resistance, and is lightweight and high-strength. It has stable performance over long-term use, is easy to maintain, and its lightweight nature helps to reduce the load on the transmission mechanism, making the lifting process more labor-saving and efficient, extending the overall service life of the equipment, and improving its adaptability and reliability in changing climatic environments.

[0033] Refer to Figure 5 The fence lifting method according to an embodiment of the present invention is applied to a photovoltaic construction safety liftable fence according to an embodiment of the present invention, wherein the fence lifting method includes the following steps: S100, Installation and Fixing: The fixing beam 100 is fixedly installed on one side of the photovoltaic module on the roof; S200, Deployment and Use: After installation and fixing, when construction personnel enter the maintenance area of ​​the photovoltaic modules, the drive component 210 drives the moving beam 300 to move upward above the fixed beam 100 to protect the construction personnel. S300 Storage: After deployment and use, when the construction personnel leave the maintenance area of ​​the photovoltaic modules, the drive component 210 drives the moving beam 300 to move downward and store it in the fixed beam 100 to reduce shading of the photovoltaic modules.

[0034] Furthermore, the fence enables dynamic protection and spatial avoidance during photovoltaic construction and maintenance. During the installation and fixing phase, the fixed beam 100 is securely installed on one side of the rooftop photovoltaic modules, providing a reliable base for subsequent lifting and lowering operations, ensuring the fence is not easily displaced or overturned in high-altitude work environments such as rooftops. During the deployment phase, after personnel enter the maintenance area, the drive component 210 drives the moving beam 300 to rise above the fixed beam 100, forming a protective barrier. This effectively isolates construction personnel from the roof edge or unprotected danger zones, significantly reducing the risk of falls and other accidents. Moreover, during the storage phase, after personnel leave, the drive component 210 reverses its movement, causing the moving beam 300 to descend and be stored within the fixed beam 100, minimizing the overall height of the fence and thus minimizing shading of the photovoltaic modules, preventing decreased power generation efficiency and localized hot spots on the modules. By closely linking protective actions with personnel entry and exit status, it achieves an intelligent safety logic of "protection when there are people, avoidance when there are no people," balancing construction safety and photovoltaic system operation benefits. The process is clear and the operation is controllable, making it suitable for standardized on-site management of various rooftop photovoltaic projects.

[0035] In both unfolding and storage, the drive assembly 210 drives the transmission beam 220 to rotate by a preset angle, thereby causing the moving beam 300 to rise or fall by a preset displacement. The amount of rotation at the preset angle corresponds to the displacement of the moving beam 300, allowing for precise adjustment of the fence height by controlling the rotation angle of the drive assembly 210, thus meeting the personalized needs of different roof conditions and protection ranges. Furthermore, during unfolding, the drive motor rotates in the first direction, causing the transmission beam 220 and the moving beam 300 to move upwards together into position. Then, the electromagnet 410 is de-energized to lock the transmission beam 220 and the moving beam 300. During storage, the electromagnet 410 is energized to unlock the transmission beam 220 and the moving beam 300, after which the drive motor rotates in a direction opposite to the first direction, causing the transmission beam 220 and the moving beam 300 to move downwards together into position. The specific control sequence for deployment and storage is clearly defined. This strategy, which combines electrical control and mechanical locking, automates the lifting and locking process. During the deployment phase, the electromagnet 410 is de-energized after the motor is precisely driven into position, thus achieving mechanical self-locking and ensuring that the protective state does not fail due to power fluctuations. During the storage phase, the motor is first energized to unlock the mechanism and then driven in the reverse direction to ensure that the moving beam 300 descends smoothly and is fully stored, avoiding structural impact or positional deviation caused by forced descent. This allows the entire process to be completed in a short time, improving on-site work efficiency.

[0036] In some embodiments, the roof entrances and exits are equipped with detection sensors, and correspondingly, the fence raising and lowering method includes the following steps: S110 Automatic Switching: After installation and fixation, the detection sensors are used to detect the entry of construction personnel to initiate the deployment and / or the exit of construction personnel to initiate the storage and retrieval step. In application, once personnel entry is detected, the deployment and retrieval step is triggered, and the moving beam 300 is raised in time to form protection. Active protection is achieved without manual intervention, significantly improving the timeliness and reliability of safety protection. Similarly, when all personnel are detected leaving the maintenance area, the storage and retrieval step is automatically triggered, and the moving beam 300 is lowered to reduce shading of the photovoltaic modules and ensure power generation efficiency. This automatic control logic based on personnel status achieves intelligent perception and response to the fence status, reducing human error and improving the precision and intelligence of on-site safety management. It is particularly suitable for large-scale rooftop photovoltaic projects or multi-person collaborative construction scenarios, effectively reducing management costs and improving operational safety.

[0037] In other embodiments, the fence raising and lowering method includes the following steps: S120, Manual Switching: After installation and fixing, construction personnel can manually operate the storage and retrieval procedure after leaving the roof. In application, this allows construction personnel to manually operate the storage and retrieval procedure after leaving the roof. Manual switching provides an important supplement and emergency measure to automatic control. In the event of network communication failure, sensor malfunction, or special operating conditions, personnel can still manually operate the system to ensure timely fence retrieval, preventing the fence from obstructing photovoltaic modules for extended periods due to lack of operation. Furthermore, manual switch operation is simple and direct, requiring no complex training, thus improving the equipment's adaptability and fault tolerance under different site conditions. Simultaneously, the coexistence of manual and automatic modes allows the fence to flexibly select the control method according to actual management needs. For example, automatic mode can be used to improve efficiency during routine operations, while manual mode can be used to ensure reliability during commissioning or special circumstances, thereby achieving the best balance between safety and convenience.

[0038] Other configurations and operations of the fence raising and lowering method according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0039] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A method of raising a fence, characterised by, The method comprises the following steps: mounting and fixing: fixing a fixed beam on one side of a photovoltaic module installed on a roof; unfolding and using: after the mounting and fixing, when a worker enters a maintenance area of the photovoltaic module, driving a component to drive a moving beam to move upwards above the fixed beam to protect the worker; storing and placing: after the unfolding and using, when the worker leaves the maintenance area of the photovoltaic module, the driving component drives the moving beam to move downwards and be stored in the fixed beam to reduce the obstruction to the photovoltaic module.

2. The method of claim 1, wherein: One end of a transmission beam is rotatably connected to the fixed beam, and the other end is rotatably connected to the moving beam; During the unfolding and using and the storing and placing, the driving component is used to drive the transmission beam to rotate by a preset angle to drive the moving beam to move up and down by a preset displacement.

3. The method of claim 2, wherein: During the unfolding and using, the transmission beam is in a vertical state; and during the storing and placing, the transmission beam is in a horizontal state.

4. A method according to claim 2 or 3, wherein: A locking mechanism is arranged between the moving beam and the transmission beam; During the unfolding and using, the locking mechanism drives the moving beam and the transmission beam to remain at a current position.

5. The method of claim 4, wherein: The driving component comprises a driving motor, and the locking mechanism comprises an electromagnet; During the unfolding and using, the driving motor rotates in a first direction to drive the transmission beam and the moving beam to move upwards together to a position, and then the electromagnet is powered off to lock the transmission beam and the moving beam; and during the storing and placing, the electromagnet is powered on to unlock the transmission beam and the moving beam, and then the driving motor rotates in a direction opposite to the first direction to drive the transmission beam and the moving beam to move downwards together to a position. An entrance of the roof is provided with a detection sensor; and the fence lifting method further comprises the following steps:

6. The method of claim 1, wherein: automatic switching: after the mounting and fixing, the detection sensor is used to detect whether a worker enters or leaves to run the unfolding and using step and / or the storing and placing step. The fence lifting method further comprises the following steps:

7. The method of claim 1 or 6, wherein: manual switching: after the mounting and fixing, a worker leaves the roof, and a manual switch is used to run the storing and placing step. A plurality of nylon ropes are arranged between the fixed beam and the moving beam; 8. The method of claim 1, wherein: During the unfolding and using, the nylon ropes can be vertically unfolded to protect the worker. The fence lifting method is executed according to any one of claims 1 to 8; 9. Photovoltaic construction safety liftable fence, characterized by: The photovoltaic construction safety liftable fence comprises: a fixed beam fixedly installed on a roof; a moving beam; a transmission beam, one end of the transmission beam is rotatably connected to the fixed beam, and the other end is rotatably connected to the moving beam; a driving component, the driving component is used to drive the transmission beam to rotate by a preset angle to drive the moving beam to move up and down by a preset displacement. The photovoltaic construction safety liftable fence further comprises an electromagnet, a bolt and a slot, the electromagnet and the bolt are arranged on the moving beam, the slot is arranged on the transmission beam, and the electromagnet can drive the bolt to be inserted into or separated from the slot.

10. The photovoltaic construction safety raisable fence according to claim 9, characterized in that: ​

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