Telescopic movable photovoltaic panel protection device for camping roof

Abstract

The utility model relates to the technical field of photovoltaic power generation equipment, in particular to a protection device for a telescopic movable photovoltaic panel on a standard camping roof of an oil field. The device comprises a base, a thrust adjusting assembly and a travel switch assembly, wherein the travel switch assembly and the thrust adjusting assembly are connected to the base; one end of the thrust adjusting assembly is connected with a direct-current push rod assembly, the other end of the thrust adjusting assembly is connected with the travel switch assembly, and the travel switch assembly is triggered to be disconnected when thrust reaches a set value; the thrust adjusting assembly and the travel switch assembly electrically control the direct-current push rod assembly to operate. And when the stretching of the photovoltaic panel is blocked and the thrust exceeds a set value, the protection device triggers a protection action to stop working, and the protection device recovers working after the fault is removed according to a designed procedure and a formulated operation program. According to the utility model, the photovoltaic panel is prevented from being damaged due to overlarge thrust of the direct-current push rod assembly, and the electric push rod motor is prevented from being burnt due to over-current when the electric push telescopic rod is blocked to extend and the current of the electric push rod motor is overlarge.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power generation equipment technology, specifically to a protective device for a retractable and movable photovoltaic panel on the roof of a camping house. Background Technology

[0002] In oil and gas field development, field teams performing well repair and oil testing typically have standard campsites, with electricity for production and daily life supplied by diesel generator sets. These teams consume large amounts of electricity, and the diesel generator sets require high maintenance, incur high operating costs, and generate significant noise and exhaust pollution. Installing photovoltaic solar panels on the roofs of these campsites integrates photovoltaic power generation and energy storage, allowing the photovoltaic power to meet the team's electricity needs for most of the time, reducing or eliminating the need for diesel generators. This approach is energy-saving, low-carbon, and environmentally friendly. However, mobile photovoltaic installations for field teams that frequently relocate face numerous limitations, requiring high power generation, ease of relocation and installation, and independence from the field camp environment. Attaching photovoltaic panels to the roof of the campsite is a feasible method, but directly laying them flat on the roof limits the number of panels and the installed capacity, making it difficult to guarantee the team's electricity needs. Extending the installation to include double-layer photovoltaic panels on the roof is a viable alternative. The specific method involves a fixed upper photovoltaic panel and an extendable lower photovoltaic panel. After the campsite is in place at the work site, the lower photovoltaic panel extends via an electric push rod. During relocation, the lower panel retracts to accommodate road transport. This double-layer photovoltaic panel installation on the campsite roof doubles the panel area, effectively doubling the power generation. This is a feasible installation method, and the power generation can basically meet the production and living electricity needs of the oilfield testing team. In the double-layer photovoltaic panel installation scheme, the upper photovoltaic panel is fixedly installed on the roof base, while the lower photovoltaic panel is installed on a sliding rail on the base. The extension and retraction of the lower photovoltaic panel are controlled by an electric push rod. After the campsite arrives at the construction site, the lower photovoltaic panel extends to maximize photovoltaic power generation; during relocation, the lower photovoltaic panel retracts to accommodate road transport. In the design of operating the photovoltaic panel extension via the electric push rod, considering the height restrictions of standard campsite road transport, the roof photovoltaic structure is required to be compact, with the overall structural height not exceeding 20cm. Standard photovoltaic (PV) panels only undergo localized strength reinforcement. Strengthening the entire structure of a standard PV panel is costly and difficult to control in terms of height. The common practice is to locally reinforce the stress points of the electric extension rod in the middle of the standard PV panel to prevent damage from the rod reaching its rated thrust or tension. In outdoor environments, if sand accumulates in the rails causing the extension rod to jam, or if the placement of individual PV panels in a restricted area prevents them from fully extending, or if the PV panels encounter obstacles during extension, the following two situations may occur: 1. The extension rod continues to operate at its rated thrust, damaging the PV panel; 2. The motor of the extension rod burns out due to excessive current. For this purpose, a retractable and movable photovoltaic panel protection device for camping roof was designed: (1) the photovoltaic panel can automatically stop when it is obstructed due to the position of the camping house, and will not be damaged due to excessive thrust; (2) the retractable and movable photovoltaic panel protection device for camping roof can automatically stop when the photovoltaic panel is extended due to overload of the electric push rod, and the photovoltaic panel can be retracted and extended and retracted multiple times by operating the electric push rod to gradually release the sand and soil blockage. Utility Model Content

[0003] This utility model aims to provide a protective device for a retractable and movable photovoltaic panel on the roof of a camping house. It effectively prevents damage to the photovoltaic panel or burnout of the electric push rod motor due to obstruction or slide rail jamming when the electric push rod pushes the photovoltaic panel out, ensuring the safe and stable operation of the photovoltaic panel and the electric push rod, and improving the reliability and service life of the equipment in the field environment.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a retractable and movable photovoltaic panel protection device for camping roofs, comprising a base, a thrust adjustment assembly, and a limit switch assembly, wherein the limit switch assembly and the thrust adjustment assembly are connected to the base; one end of the thrust adjustment assembly is connected to a DC electric actuator assembly, and the other end is connected to the limit switch assembly, wherein the limit switch assembly is triggered to disconnect when the thrust reaches a set value; the thrust adjustment assembly and the limit switch assembly electrically control the operation of the DC electric actuator assembly.

[0005] The limit switch assembly includes a limit switch wire, a limit switch, and a limit switch mounting base. The limit switch wire connects the limit switch and the lead-out power line of the DC electric actuator assembly in series in the positive conduction circuit of the DC electric actuator assembly, realizing unidirectional on / off control of the DC electric actuator assembly circuit. The limit switch is fixed on the base by the limit switch mounting base. When the thrust adjustment assembly is subjected to a large thrust and reaches the set value, the limit switch is triggered. After the limit switch is triggered and disconnected, the power supply to the DC electric actuator assembly is cut off.

[0006] The thrust adjustment assembly adjustment device for adjusting the maximum allowable thrust includes a thrust adjustment rod flange, a thrust adjustment rod fixed wing plate, a thrust adjustment spring, a thrust adjustment rod body, a thrust rod adjustment nut, and a thrust adjustment rod groove.

[0007] The thrust adjusting rod fixed wing plate is mounted on the base. One end of the thrust adjusting rod body is provided with a thrust adjusting rod flange, which is positioned and connected in the thrust adjusting rod fixed wing plate, allowing for limited movement within the fixed wing plate. The other end of the thrust adjusting rod body is provided with a thrust adjusting rod groove, and the DC electric actuator assembly is connected to the thrust adjusting rod groove, enabling the thrust of the DC electric actuator assembly to be accurately transmitted to the thrust adjusting rod body. One end of the thrust adjusting rod body connected to the DC electric actuator assembly is threadedly connected with a thrust rod adjusting nut. A thrust adjusting spring is provided on the thrust adjusting rod body between the thrust adjusting rod fixed wing plate and the thrust rod adjusting nut. The thrust rod adjusting nut adjusts the pre-compression of the thrust adjusting spring, thereby setting the maximum allowable thrust of the DC electric actuator assembly.

[0008] The outer diameter of the thrust adjustment rod body matches the diameter of the DC electric push rod assembly, serving to transmit thrust and trigger the protection mechanism.

[0009] The inner diameter of the thrust adjusting spring matches the outer diameter of the adjusting rod body.

[0010] The DC electric actuator assembly includes an electric actuator motor, which is a general-purpose DC motor. A fixed boss is connected to the front end of the electric actuator motor, and the front end of the fixed boss is connected to a thrust adjustment assembly. The other end of the electric actuator motor is sequentially connected to an electric actuator cylinder and an electric actuator telescopic rod. The electric actuator telescopic rod slides and extends within the electric actuator cylinder. A telescopic end boss is provided at the free end of the electric actuator telescopic rod, and a lower photovoltaic panel is connected to the end of the telescopic end boss. The electric actuator telescopic rod controls the extension and retraction of the lower photovoltaic panel.

[0011] Beneficial effects:

[0012] 1. Protect the photovoltaic panels

[0013] When the extension of the photovoltaic panel is obstructed, the electric push rod stops when the thrust reaches the set value, thus avoiding damage to the photovoltaic panel due to excessive thrust, such as cracking or deformation, and extending the service life of the photovoltaic panel.

[0014] 2. Protect the electric actuator motor

[0015] This invention can automatically stop working before the thrust of the electric push rod exceeds the rated value, preventing the electric push rod motor from burning out due to excessive current and reducing motor maintenance and replacement costs.

[0016] 3. Adapt to field relocation environment

[0017] This invention addresses the issue of slide rail jamming caused by wind and sand in the field. By operating the electric push rod, the photovoltaic panels can be repeatedly retracted and extended. Utilizing the buffering effect of the thrust adjustment spring and the control of the limit switch, the sand jamming is gradually released. Under severe road conditions with strong bumps during relocation and transportation, the buffering effect of the thrust adjustment spring can prevent the lower photovoltaic panels installed on the slide rail from exerting a strong impact on the electric push rod's motion control structure, thereby improving the reliability and stability of the equipment in the field environment.

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure and partial cross-sectional view of the present invention;

[0021] Figure 2 This is a schematic diagram showing the connection between the present invention and the electric actuator;

[0022] Figure 3 This is a schematic diagram showing the connection between the present invention and the electric actuator in field use;

[0023] Figure 4 This is a schematic diagram of the principle of the limit switch that allows the DC push rod to conduct in the reverse direction after the limit switch is disconnected, which is a matching limit switch for this utility model.

[0024] In the diagram: 1. Limit switch wire; 2. Base; 3. Limit switch; 4. Limit switch mounting base; 5. Thrust adjusting rod flange; 6. Thrust adjusting rod fixing wing plate; 7. Thrust adjusting spring; 8. Thrust adjusting rod body; 9. Thrust rod adjusting nut; 10. Thrust adjusting rod groove; 11. Electric actuator fixing boss; 12. Electric actuator motor; 13. Electric actuator cylinder; 14. Electric actuator telescopic end boss; 15. Electric actuator telescopic rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example:

[0027] according to Figures 1-4 The illustrated retractable and movable photovoltaic panel protection device for a camping roof includes a base 2, a thrust adjustment assembly, and a limit switch assembly. The limit switch assembly and the thrust adjustment assembly are connected to the base 2, which serves as the mounting foundation for the entire device and provides a stable support platform for other components. The thrust adjustment assembly adjusts the maximum allowable thrust, with one end connected to a DC electric actuator assembly and the other end connected to the limit switch assembly. When the thrust reaches a set value, the limit switch assembly is triggered to disconnect. The thrust adjustment assembly and the limit switch assembly electrically control the operation of the DC electric actuator assembly.

[0028] like Figure 1 As shown, the limit switch assembly includes a limit switch wire 1, a limit switch 3, and a switch mounting base 4. The limit switch wire 1 connects the limit switch 3 in series with the lead-out power line of the DC electric actuator assembly in the positive conduction circuit of the DC electric actuator assembly, realizing unidirectional on / off control of the DC electric actuator assembly circuit. The limit switch 3 is fixed on the base 2 by the limit switch mounting base 4 to ensure that the position of the limit switch 3 is accurate and stable. When the thrust adjustment assembly is subjected to a large thrust and reaches the set value, the limit switch 3 is triggered. After the limit switch 3 is triggered and disconnected, the power supply to the DC electric actuator assembly can be cut off in time, so that the electric actuator motor 12 stops running, protecting the photovoltaic panel and the electric actuator motor 12.

[0029] like Figure 4 As shown, the limit switch 3 and the DC electric actuator assembly are used in conjunction with a DC motor. The extension and retraction of the electric actuator 15 are achieved by reversing the positive and negative terminals of the DC power supply. The limit switch 3 has a bypass circuit connected in parallel with a diode for unidirectional conduction. Its function is that when the limit switch is on, the electric actuator 15 can be extended. If the extension of the lower photovoltaic panel is blocked, the limit switch is triggered to open. The electric actuator motor 12 can be reversed by reversing the positive and negative terminals of the DC electric actuator assembly power supply. At this time, the diode bypass connected in parallel with the limit switch 3 is turned on, the DC electric actuator 15 is retracted, and the limit switch 3 is reset.

[0030] Furthermore, the thrust adjustment assembly includes a thrust adjustment rod flange 5, a thrust adjustment rod fixing wing plate 6, a thrust adjustment rod body 8, a thrust adjustment spring 7, a thrust rod adjustment nut 9, and a thrust adjustment rod groove 10;

[0031] The thrust adjusting rod fixed wing plate 6 is mounted on the base 2. One end of the thrust adjusting rod body 8 is provided with a thrust adjusting rod flange 5, which is positioned and connected in the thrust adjusting rod fixed wing plate 6, serving as a one-way limiting function. It can limit and guide movement within the thrust adjusting rod fixed wing plate 6, and the thrust adjusting rod body 8 can move axially within the fixed wing plate 6. The other end of the thrust adjusting rod body 8 is provided with a thrust adjusting rod groove 10, and the DC electric push rod assembly is connected to the thrust adjusting rod groove 10, so that the thrust of the DC electric push rod assembly can be accurately transmitted to the thrust adjusting rod body 8. The thrust adjusting rod body 8 is connected to the DC electric push rod assembly and the thrust adjusting spring 7, accurately transmitting the thrust and triggering the limit switch 3 when the maximum allowable thrust is reached. One end of the thrust adjusting rod body 8 connected to the DC electric push rod assembly is threadedly connected with a thrust rod adjusting nut 9. A thrust adjusting spring 7 is installed on the thrust adjusting rod body 8 between the thrust adjusting rod fixed wing plate 6 and the thrust rod adjusting nut 9. The thrust adjusting spring 7 is the core buffer and force adjusting component, which is achieved through compression deformation. The protection mechanism is triggered according to the amount of compression. The thrust adjusting spring 7 changes the pre-compression amount through the thrust rod adjusting nut 9, thereby adjusting the maximum thrust that the DC electric push rod assembly can output. According to the structural strength of the photovoltaic panel and the actual use requirements, the maximum thrust value is precisely set, and the position of the thrust rod adjusting nut 9 is adjusted. The maximum allowable thrust is slightly less than the maximum thrust that the photovoltaic panel structure can withstand. When the thrust of the electric push telescopic rod 15 exceeds the set value, the thrust adjusting spring 7 is compressed, triggering the subsequent protection mechanism. It also plays a buffering role in road transportation under harsh road conditions, reducing the impact on the electric push telescopic rod 15 and the photovoltaic panel.

[0032] The outer diameter of the thrust adjusting rod body 8 is similar to the diameter of the electric thrust telescopic rod 15, playing a key role in transmitting thrust and triggering the protection mechanism.

[0033] The inner diameter of the thrust adjusting spring 7 is matched with the outer diameter of the adjusting rod body 8. The spring wire material, middle diameter, and number of turns n are calculated based on the structural strength of the photovoltaic panel.

[0034] Furthermore, such as Figure 2 and Figure 3 As shown, the DC electric actuator assembly includes an electric actuator motor 12, which is a general-purpose DC motor. The front end of the electric actuator motor 12 is connected to an electric actuator fixing boss 11, and the front end of the electric actuator fixing boss 11 is connected to a thrust adjustment assembly. The other end of the electric actuator motor 12 is sequentially connected to an electric actuator cylinder 13 and an electric actuator telescopic rod 15. The electric actuator telescopic rod 15 slides and extends within the electric actuator cylinder 13. The free end of the electric actuator telescopic rod 15 is provided with an electric actuator telescopic end boss 14, and the end of the electric actuator telescopic end boss 14 is connected to a lower photovoltaic panel. The telescopic rod 15 controls the extension and retraction of the lower photovoltaic panel.

[0035] After the limit switch 3 is triggered, the DC electric actuator assembly can respond to the stop command in a timely manner, and can restart operation according to the preset program and safety requirements during the subsequent recovery process.

[0036] The electric actuator motor 12 is a general-purpose DC motor, which can control the extension or retraction of the electric actuator telescopic rod 15 by connecting the positive and negative terminals of the power supply.

[0037] After the campsite is moved into place, operate the DC electric actuator assembly to extend the lower photovoltaic panel; (1) when the lower photovoltaic panel encounters an obstacle and is blocked, and the DC electric actuator assembly reaches the maximum allowable thrust, the limit switch 3 is triggered to be in the open state to protect the photovoltaic panel from damage; (2) the DC electric actuator assembly uses a DC motor to drive the electric telescopic rod 15. When the photovoltaic panel extension is blocked due to sand in the slide rail in the field environment, the selected schematic diagram is as follows. Figure 3 Limit switch 3 can operate the electric actuator motor 12 to reverse, and the electric actuator telescopic rod 15 can retract when limit switch 3 is activated. By repeatedly operating the electric actuator telescopic rod 15 to extend and retract, the sand stuck in the slide rail can be gradually released.

[0038] The working principle of this utility model is as follows:

[0039] In this invention, the maximum allowable thrust F is determined based on the structural strength of the photovoltaic panel. The maximum thrust of the electric actuator is selected to be slightly greater than or equal to F, and the parameters of the thrust adjusting spring 7 are calculated accordingly. The thrust rod adjusting nut 9 allows adjustment of the maximum allowable thrust of the electric actuator by adjusting the pre-compression L1 of the thrust adjusting spring 7. The outer diameter of the thrust adjusting rod body 8 is approximately the same as the diameter of the electric actuator telescopic rod 15. It has a thrust adjusting rod flange 5, which is installed in the thrust adjusting rod fixing wing plate 6 located on the base 2. The thrust adjusting rod groove 10 is connected to the DC electric actuator assembly. The maximum thrust of the electric actuator telescopic rod 15 is adjusted by adjusting the thrust adjusting spring 7 through the thrust rod adjusting nut 9.

[0040] During on-site implementation, the maximum allowable thrust is determined based on the structural strength of the photovoltaic panel. This determines the material and winding parameters of the thrust adjustment spring 7. The maximum allowable thrust is adjusted using the thrust rod adjustment nut 9. When the thrust exceeds the set value, the DC electric push rod assembly compresses the thrust adjustment spring 7, causing the tail end of the thrust adjustment rod body 8 to trigger the limit switch 3 to disconnect. The limit switch wire 1 of the limit switch 3 is connected in series to the extended power line of the DC electric push rod assembly. After the limit switch 3 disconnects, the DC electric push rod assembly is de-energized, and the electric push rod motor 12 stops running, protecting the photovoltaic panel and the electric push rod motor 12. At this time, the operable electric push telescopic rod 15 can reverse and begin to retract, and the limit switch resets.

[0041] The principle for determining the parameters of the thrust adjusting spring 7 is as follows: Based on the structural strength of the photovoltaic panel, the maximum allowable thrust F for the electric telescopic rod 15 to push the lower photovoltaic panel is determined. The pre-compression range of the thrust adjusting spring 7 is initially determined by adjusting the thrust rod adjusting nut 9. The design parameters of the thrust adjusting spring 7 are determined through calculation, including the spring stiffness K. Based on the spring stiffness, a material with a shear modulus G is selected. Further calculations determine the spring wire diameter Φ, mean diameter D, and number of turns n.

[0042] Calculation steps and formulas:

[0043] For example: Based on the structural strength of the photovoltaic panel, the maximum allowable thrust is determined to be F. The thrust rod adjusting nut 9 is used to pre-compress the thrust adjusting spring 7 to L1 (this pre-compression of the thrust adjusting spring 7 simultaneously achieves an elastic buffer connection between the lower photovoltaic panel and the electric actuator). L2 is the maximum stroke length of the limit switch triggered at the rod end. Therefore, the maximum stroke of the thrust adjusting rod body 8 is L2. If the spring stiffness is K, when the electric actuator reaches the maximum allowable thrust, then...

[0044] F= (1)

[0045] The determination of spring stiffness K is related to the shear modulus G of spring material, spring wire diameter d, mean diameter d2, and number of turns n.

[0046] The calculation formula is:

[0047] (2)

[0048] In the formula, K is the spring stiffness, N / m; G is the shear modulus of the spring material, which is usually taken as G=8×104MPa for steel; d is the spring wire diameter, in m; d2 is the spring mean diameter, in m; and n is the effective number of spring coils.

[0049] Therefore, F= (3)

[0050] First based on and Figure 2The outer diameter of the thrust adjusting rod body 8, which matches the electric push telescopic rod 15, determines the spring parameters such as the spring's middle diameter d2. Based on the force required for the normal push of the lower photovoltaic panel, the pre-compression amount L1 of the thrust adjusting spring 7 is initially determined. Based on the maximum allowable thrust F of the lower photovoltaic panel's structural strength, the maximum stroke length L2 of the thrust adjusting rod body 8 triggering the limit switch 3 is determined. Then, based on formula (3) and the structural design of the thrust adjusting rod body 8, the spring stiffness K and other spring parameters can be calculated and determined by adjusting the different wire diameters of the spring 7. The principle is that when the compression amount is (L1+L2), the compression force of the compression spring (electric push rod thrust) is less than or equal to the maximum allowable thrust F. In this utility model, the maximum allowable thrust F is determined based on the structural strength of the photovoltaic panel, and the maximum thrust of the electric push telescopic rod 15 is selected to be slightly greater than or equal to F. Based on this, the parameters of the thrust adjusting spring 7 are calculated and determined. The thrust rod adjusting nut 9 is set so that the maximum allowable thrust of the electric push telescopic rod 15 can be adjusted by adjusting the pre-compression amount L1 of the thrust adjusting spring 7. The outer diameter of the thrust adjusting rod body 8 is similar to that of the electric thrust telescopic rod 15. It has a thrust adjusting rod flange 5 and is installed in the thrust adjusting rod fixing wing plate 6 located on the base 2. The thrust adjusting rod groove 10 is connected to the DC electric thrust rod assembly. The maximum allowable thrust of the electric thrust telescopic rod 15 is adjusted by adjusting the thrust adjusting spring 7 through the thrust rod adjusting nut 9. Compared with the prior art, the beneficial effects of this utility model are as follows: When the double-layer photovoltaic panel on the roof of the camping house is pushed out by the electric push rod at the field operation site: (1) When the photovoltaic panel is blocked by obstacles due to site restrictions, the electric push rod stops when the push force reaches the set value, and the photovoltaic panel will not be damaged due to excessive push force; (2) In the field environment, the slide rail for pushing out and retracting the lower photovoltaic panel on the roof of the camping house may be stuck due to sand accumulation. At this time, the photovoltaic panel can be repeatedly retracted and pushed out by operating the electric push rod to gradually remove the sand jamming; Under the severe road conditions of strong bumps at the relocation and transportation site, the pre-compressed push adjustment spring 7 plays a buffering role to avoid the strong impact of the lower photovoltaic panel installed on the slide rail on the electric push rod movement control structure; (3) The electric push rod usually comes with an overcurrent protection device. This utility model can automatically stop before the push force exceeds the rated value of the electric push rod, and play a timely protection role to prevent the electric push rod motor from burning out due to overcurrent.

[0051] Device installation:

[0052] First, fix base 2 in a suitable position on the roof of the campsite to ensure it is stable.

[0053] Next, the limit switch 3 is installed on the base 2 via the limit switch mounting base 4, and the limit switch wire 1 is connected in series in the DC positive circuit extending from the DC push rod assembly.

[0054] Then, the thrust adjusting rod body 8 is installed in the thrust adjusting rod fixed wing plate 6, so that the thrust adjusting rod flange 5 and the fixed wing plate 6 are well matched.

[0055] Furthermore, install the thrust adjustment spring 7, and adjust the spring pre-compression amount according to the calculated parameters through the thrust rod adjusting nut 9.

[0056] Finally, the thrust adjustment rod groove 10 is connected to the electric push rod fixed connection boss 11, and the electric push rod telescopic end boss 14 on the electric push telescopic rod 15 is connected to the lower photovoltaic panel.

[0057] Parameter settings and debugging:

[0058] Based on the actual structural strength of the photovoltaic panel, the parameters of the spring, such as stiffness, wire diameter, mean diameter, and number of turns, are calculated and determined, and a suitable spring material is selected accordingly.

[0059] After installation, conduct debugging to simulate a situation where the photovoltaic panel extension is obstructed. When the rated thrust F is reached, check whether the limit switch 3 can operate accurately and whether the electric telescopic rod 15 can stop in time. If necessary, readjust the thrust rod adjusting nut 9 to optimize the parameter settings.

[0060] The debugging is complete, and the device has entered normal working condition.

[0061] Where there is no conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effects. Specific details of the various combinations will not be elaborated here.

[0062] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0063] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0064] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent variations, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. A retractable and movable photovoltaic panel protection device for camping roofs, characterized in that: It includes a base (2), a thrust adjustment assembly and a limit switch assembly, wherein the limit switch assembly and the thrust adjustment assembly are connected to the base (2); one end of the thrust adjustment assembly is connected to a DC electric push rod assembly and the other end is connected to the limit switch assembly, and the limit switch assembly is triggered to disconnect when the thrust reaches a set value; the thrust adjustment assembly and the limit switch assembly electrically control the operation of the DC electric push rod assembly.

2. The retractable and movable photovoltaic panel protection device for camping roofs as described in claim 1, characterized in that: The limit switch assembly includes a limit switch wire (1), a limit switch (3), and a limit switch mounting base (4). The limit switch wire (1) connects the limit switch (3) and the lead-out power line of the DC electric actuator assembly in series in the positive conduction circuit of the DC electric actuator assembly, thereby realizing unidirectional on / off control of the DC electric actuator assembly circuit. The limit switch (3) is fixed on the base (2) through the limit switch mounting base (4). When the thrust adjustment assembly is subjected to a large thrust and reaches the set value, the limit switch (3) is triggered. After the limit switch (3) is triggered to open, the power supply of the DC electric actuator assembly is cut off.

3. The retractable and movable photovoltaic panel protection device for camping roofs as described in claim 1, characterized in that: The thrust adjustment assembly adjustment device allows for the maximum thrust, including a thrust adjustment rod flange (5), a thrust adjustment rod fixing wing plate (6), a thrust adjustment spring (7), a thrust adjustment rod body (8), a thrust rod adjustment nut (9), and a thrust adjustment rod groove (10). The thrust adjusting rod fixed wing plate (6) is installed on the base (2). One end of the thrust adjusting rod body (8) is provided with a thrust adjusting rod flange (5). The thrust adjusting rod flange (5) is positioned and connected in the thrust adjusting rod fixed wing plate (6) and can be limited to move in the thrust adjusting rod fixed wing plate (6). The other end of the thrust adjusting rod body (8) is provided with a thrust adjusting rod groove (10). The DC electric push rod assembly is connected to the thrust adjusting rod groove (10) so that the thrust of the DC electric push rod assembly can be accurately transmitted to the thrust adjusting rod body (8). One end of the thrust adjusting rod body (8) connected to the DC electric push rod assembly is threaded with a thrust rod adjusting nut (9). A thrust adjusting spring (7) is provided on the thrust adjusting rod body (8) between the thrust adjusting rod fixed wing plate (6) and the thrust rod adjusting nut (9). The thrust rod adjusting nut (9) adjusts the pre-compression of the thrust adjusting spring (7) and thus sets the maximum allowable thrust of the DC electric push rod assembly.

4. The retractable and movable photovoltaic panel protection device for camping roofs as described in claim 3, characterized in that: The outer diameter of the thrust adjusting rod body (8) matches the diameter of the DC electric push rod assembly, which serves to transmit thrust and trigger the protection mechanism.

5. The retractable and movable photovoltaic panel protection device for camping roofs according to claim 3, characterized in that: The inner diameter of the thrust adjusting spring (7) matches the outer diameter of the adjusting rod body (8).

6. The retractable and movable photovoltaic panel protection device for camping roofs as described in claim 1, characterized in that: The DC electric actuator assembly includes an electric actuator motor (12), which is a general-purpose DC motor. The front end of the electric actuator motor (12) is connected to an electric actuator fixing boss (11), and the front end of the electric actuator fixing boss (11) is connected to a thrust adjustment assembly. The other end of the electric actuator motor (12) is sequentially connected to an electric actuator cylinder (13) and an electric actuator telescopic rod (15). The electric actuator telescopic rod (15) slides in the electric actuator cylinder (13). The free end of the electric actuator telescopic rod (15) is provided with an electric actuator telescopic end boss (14), and the end of the electric actuator telescopic end boss (14) is connected to a lower photovoltaic panel. The electric actuator telescopic rod (15) controls the pushing out and retracting of the lower photovoltaic panel.

Images